chore: import upstream snapshot with attribution

skills/hyperframes-creative/frame-presets/broadside/FRAME.md

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+---
+version: alpha
+name: Broadside — Frame (video / frame layer)
+description: >
+  Video-first companion to Broadside's design.md. The unit is the frame (1920×1080). Atoms are
+  identical and sacred — the two-register surface system (dark ink-black / fire-orange), massive
+  Barlow in lowercase weight 900 treated as graphic primitive, IBM Plex Mono chrome (uppercase,
+  0.14em), the single fire-orange accent, the flat plane, and 1px hairline dividers. Composition +
+  frame scale rewritten for the frame. Motion out of scope.
+unit: the frame — 1920×1080 primary; 9:16 and 1:1 documented
+principle: atoms are sacred · composition is free · numbers come from the script
+
+colors:
+  ink-black: "#111111"
+  ink-black-alt: "#1A1A18"
+  fire-orange: "#E85D26"
+  cream: "#F0ECE5"
+  cream-muted: "#888880"
+  cream-hint: "#505048"
+  border-dark: "#282826"
+  ink-on-orange-muted: "rgba(17,17,17,0.75)"
+  ink-on-orange-hint: "rgba(17,17,17,0.55)"
+  ink-on-orange-faint: "rgba(17,17,17,0.40)"
+  ink-on-orange-border: "rgba(17,17,17,0.20)"
+
+typography:
+  # — reading ramp —
+  body:    { fontFamily: "Barlow", cqw: 1.2, weight: 400, lineHeight: 1.6 }
+  lead:    { fontFamily: "Barlow", cqw: 1.6, weight: 400, lineHeight: 1.5 }
+  caption: { fontFamily: "Barlow", cqw: 0.9, weight: 400, lineHeight: 1.5 }
+  label:   { fontFamily: "IBM Plex Mono", cqw: 0.72, weight: 500, tracking: "0.14em", upper: true }
+  # — display / hero ramp (Barlow, lowercase, negative tracking) —
+  h3:      { fontFamily: "Barlow", cqw: 2.8, weight: 600, lineHeight: 1.2, lower: true }
+  quote-text:{ fontFamily: "Barlow", cqw: 3.8, weight: 700, lineHeight: 1.15, tracking: "-0.02em", lower: true }
+  h2:      { fontFamily: "Barlow", cqw: 4.5, weight: 700, lineHeight: 1.1, tracking: "-0.02em", lower: true }
+  stat-value:{ fontFamily: "Barlow", cqw: 5.5, weight: 900, lineHeight: 1.0, tracking: "-0.04em" }
+  h1:      { fontFamily: "Barlow", cqw: 7.5, weight: 800, lineHeight: 0.9, tracking: "-0.03em", lower: true }
+  fadelist-item:{ fontFamily: "Barlow", cqw: 7.5, weight: 900, lineHeight: 1.0, tracking: "-0.03em", lower: true }
+  quote-mark:{ fontFamily: "Barlow", cqw: 10.0, weight: 900, lineHeight: 0.6 }
+  fadelist-title:{ fontFamily: "Barlow", cqw: 10.5, weight: 900, lineHeight: 0.9, tracking: "-0.04em", lower: true }
+  display: { fontFamily: "Barlow", cqw: 13.0, weight: 900, lineHeight: 0.88, tracking: "-0.04em", lower: true }
+
+spacing:
+  pad-x: "5.5cqw"
+  pad-y: "5.5cqw"
+  gap-lg: "3.5cqw"
+  gap-md: "2cqw"
+  gap-sm: "1cqw"
+
+components:
+  registers:
+    dark: "ground {colors.ink-black}, text {colors.cream}, accent {colors.fire-orange}"
+    orange: "ground {colors.fire-orange}, text {colors.ink-black}"
+    description: "Two surfaces only — no cream/paper register. One register per frame."
+  slide-chrome:
+    rule: "1px solid {colors.border-dark} (dark) / 20% ink (orange)"
+    placement: "top + bottom bars (label left, number right)"
+    description: "SUPPRESSED on cover/chapter/statement/quote/end — declarative frames let type fill the field."
+  kicker:
+    typography: "{typography.label}"
+    color: "{colors.fire-orange} (dark) / 55% ink (orange)"
+    description: "Uppercase mono eyebrow."
+  rule:
+    backgroundColor: "{colors.fire-orange} (dark) / {colors.ink-black} (orange)"
+    size: "36×2px"
+    description: "Stub accent bar — the system's only ornament."
+  broadside-num:
+    typography: "{typography.label}"
+    placement: "top-left of orange cover/chapter, low opacity"
+    description: "Mono catalogue numeral."
+  stat-card:
+    borderTop: "1px solid {colors.border-dark}"
+    typography: "{typography.stat-value} (orange on dark / ink on orange) + {typography.body} + {typography.label}"
+    description: "Top-border-only block, no other borders."
+  bullet:
+    marker: "orange `/` mono via ::before"
+    typography: "{typography.lead}"
+    description: "Capped at THREE items."
+  bar-track:
+    borderLeft: "1px solid {colors.border-dark}"
+    bars: "{colors.cream-hint}, one .accent {colors.fire-orange}"
+    typography: "{typography.label} axis"
+    description: "Vertical bar chart, left axis only."
+  compare-panel:
+    layout: "two equal panels split by a 1px vertical rule"
+    payoff: "right panel may fill {colors.fire-orange}"
+    description: "Before/after."
+  fadelist:
+    typography: "{typography.fadelist-item} ×3 at opacity 1.0/0.5/0.22 + {typography.fadelist-title}"
+    description: "Three stacked words + one oversized title opposite."
+---
+
+# Broadside — Frame (video / frame layer)
+
+## Overview
+
+Broadside at frame scale is a **protest-poster system where type is so large it stops reading as
+text and becomes graphic primitive.** Barlow `display` at 13cqw puts a single lowercase word
+nearly across the frame. The system runs in **two registers**: a dark ink-black ground with cream
+text for documentation, and a fire-orange ground with dark ink for declaration. Fire-orange is the
+_only_ color — accent on dark, environment on orange. The plane is flat; hierarchy is weight, size,
+and 1px hairlines.
+
+**Barlow** carries every text role from display to body — expressive range from weight (400–900)
+and size, not face contrast. **IBM Plex Mono** is chrome only (numbers, kickers, tags, axis labels,
+the `/` bullet marker), always uppercase and tracked. Display is **lowercase** — the system's most
+distinctive single decision, a deliberate inversion of the brutalist norm.
+
+**Key characteristics at frame scale:**
+
+- **Two registers** — dark (cream text) / orange (ink text). No cream/paper register.
+- **Massive lowercase Barlow 900**, negative-tracked, as graphic primitive (display 13cqw).
+- **Fire-orange is the only color** — accent on dark, full environment on orange.
+- **IBM Plex Mono chrome** — uppercase, 0.14em; the `/` bullet marker; mono catalogue numbers.
+- **Flat plane** — no shadow, no radius (save nav dots), no gradient; 1px hairlines carry structure.
+- **Low density** — one statement per frame, bullets capped at three, chrome suppressed on declarative frames.
+
+## The Frame
+
+### Frame Craft Bar
+
+Three eyeball tests gate every frame before any structural check:
+
+- **Squint** — exactly **one display moment dominates** at 3–6× everything else; nothing competes.
+- **Silence** — declarative frames read **45–55% empty**; the **stat grid is the one dense exception**.
+- **Restraint** — **one register per frame**; **fire-orange is the only color** (accent on dark, environment on orange); one display moment; bullets capped at three.
+- **Reference** — aim at **broadside printing / a SPACE10 report / a Wim Crouwel grid with one loud color**; failure looks like a **multi-accent corporate slide deck**.
+
+- **Primary:** 1920×1080 (16:9). Type authored in **`cqw`** (`px ÷ 1920 × 100 = cqw`; or carry the source's `vw` 1:1).
+- **Vertical:** 1080×1920 (9:16). **Square:** 1080×1080 (1:1).
+- **Safe area:** `pad-x`/`pad-y` 5.5cqw — deliberately tight so the massive type crowds the frame edge.
+
+**The container law (load-bearing).** Every frame ground sets `container-type: size`; ALL
+frame-relative units are `cqw`/`cqh` against it — never `vw` (a `vw`-sized frame inflates when not
+full-screen). 1px hairlines stay 1px.
+
+## Colors
+
+Tokens identical to the source, in two registers. **Dark:** `{colors.ink-black}` ground,
+`{colors.cream}` text, `{colors.fire-orange}` accent (kickers, accent stat, bullet `/`, lead bar,
+quote mark, rule stub). **Orange:** `{colors.fire-orange}` ground, `{colors.ink-black}` headlines +
+body, with the dark-ink overlays (75/55/40/20%) as the muted tones. Choose one register per frame
+and commit. **No second accent color** — on orange, emphasis is weight/opacity on the ink, never a
+new hue. Cream text on orange does not exist (ink-on-fire is absolute).
+
+## Typography
+
+Two ramps. The **reading ramp** (Barlow body 1.2cqw, mono label 0.72cqw) carries copy + chrome; the
+**display ramp** (Barlow `h2` 4.5cqw → `display` 13cqw, weight 700–900) carries every statement.
+
+- **Legibility floor:** any load-bearing line ≥ **1.4cqw**; mono labels are chrome only.
+- **Fit-to-measure:** size the headline to its length. Cap the block at **≤ 78cqw**; ≤2 words → `display`; 3–4 → `h1`; 5+ → `h2`. Broadside packs only ONE display moment per frame.
+- **Barlow display is lowercase, weight 700–900, negative-tracked** (−0.04em largest, −0.02em h2). **Mono chrome is uppercase, 0.1em+.** No italic, no underline, no uppercase display.
+
+## Depth & Surface
+
+Flat plane, the only technique. Hierarchy from:
+
+- **Weight + size contrast** — the dominant signal (900 lowercase display).
+- **1px hairlines** — chrome bars, stat-card top, compare divider, bar-track left, chart baseline.
+- **Color shift** — orange on ink, ink on cream, cream-muted on cream.
+- **Negative space** — generous, intentional empty regions.
+
+**Ceiling:** no box-shadow, no elevation, no rounded surface (save nav dots), no gradient ground.
+
+## Shapes
+
+- **0 radius everywhere** except nav dots (50%). Cards, panels, tags, stat blocks, bars — sharp rectangles.
+
+## Components
+
+- **registers** — the two-surface system. **slide-chrome** — optional hairline bars, suppressed on declarative frames.
+- **kicker** (mono eyebrow) / **rule** (36×2 stub) / **broadside-num** (catalogue mark) — the chrome ornament set.
+- **stat-card** (top-border only) / **bullet** (orange `/`, max 3) / **bar-track** (one accent bar) / **compare-panel** (orange payoff) / **fadelist** (1.0/0.5/0.22 stack).
+
+## Frame Treatments
+
+> Recipe: ground · register · composes · focal · chrome · accent · silence · Fixed/Free · density.
+> One statement per frame; chrome suppressed on declarative frames.
+
+### 1 · Cover (identity · move: massive type · ORANGE register · left)
+
+**Ground** fire-orange. **Composes** broadside-num, rule, kicker, display, lead. **Focal** a 1–2 word
+Barlow `display` (13cqw) lowercase in ink, left-anchored, over a small ink rule stub + mono kicker; a
+Barlow lead line beneath in 75% ink. **Chrome** mono catalogue number top-left, mono meta top-right
+(no chrome bars). **Accent** the ink itself is the pop on orange. **Silence** ~45%. **Fixed** ink-on-fire,
+lowercase 900, flat. **Free** the word, kicker, lead. **Density** low.
+
+### 2 · Statement (declarative · move: type IS composition · DARK register · left)
+
+**Ground** ink-black. **Composes** kicker, display. **Focal** a 2–4 word Barlow `display`/`h1`
+lowercase in cream, with ONE clause inked `{colors.fire-orange}`. **Chrome** mono kicker; no bars.
+**Accent** the orange clause. **Silence** ~55%. **Fixed** lowercase 900, one orange clause, flat.
+**Free** the statement, which clause is orange. **Density** low.
+
+### 3 · Stat Grid (data · move: top-border cards · DARK · the dense frame)
+
+**Ground** ink-black, chrome bars present. **Composes** slide-chrome, kicker, 3× stat-card. **Focal** a
+row of three top-border-only stat-cards — big Barlow-900 numeral in `{colors.fire-orange}`, Barlow
+label, mono note. **Chrome** top + bottom hairline bars (label + number). **Accent** the orange
+numerals. **Silence** moderate — the density exception. **Fixed** top-border-only cards, orange
+numerals, 1px hairlines. **Free** figures (from script), labels. **Density** dense-exception.
+
+### 4 · Fadelist (narrative · move: opacity stack · DARK)
+
+**Ground** ink-black. **Composes** fadelist (3 stacked Barlow-900 words at 1.0/0.5/0.22), fadelist-title.
+**Focal** the three-stage word stack opposite an oversized display title in `{colors.fire-orange}`
+(before/during/after). **Accent** the orange title. **Silence** moderate. **Fixed** the opacity
+ladder, lowercase 900. **Free** the three words, the title. **Density** low-moderate.
+
+### 5 · Pull Quote (quote · move: oversized mark · DARK · left)
+
+**Ground** ink-black, chrome suppressed. **Composes** quote-mark, quote-text, attribution. **Focal** a
+Barlow `quote-text` (700, lowercase) at ≤78cqw under an oversized fire-orange `quote-mark` (10cqw,
+line-height 0.6). **Chrome** mono attribution (name + role). **Accent** the orange quote mark. **Silence**
+~50%. **Fixed** orange mark, lowercase quote. **Free** quote, attribution. **Density** low.
+
+### 6 · Compare (argument · move: split + orange payoff · DARK→ORANGE)
+
+**Ground** ink-black left panel + fire-orange right (payoff) panel, 1px divider. **Composes**
+compare-panel pair, kicker, h3. **Focal** two panels — left documents (cream on dark), right declares
+(ink on orange). **Chrome** mono panel labels. **Accent** the orange payoff panel. **Silence** moderate.
+**Fixed** ink-on-fire right panel, 1px divider, flat. **Free** the before/after content. **Density** standard.
+
+## Composition Rules
+
+### Do
+
+- Set every Barlow display in **lowercase weight 900**, negative-tracked — the system's signature.
+- Use **fire-orange as full environment** on declarative frames, the **lone accent** on dark.
+- Keep chrome in **IBM Plex Mono uppercase, 0.14em**; use the `/` mono bullet marker.
+- **Cap bullets at three; one statement per frame**; build hierarchy from weight, size, 1px hairlines.
+- Suppress chrome bars on cover/chapter/statement/quote/end; let type fill the field.
+- Lean left on most frames; the type IS the composition.
+
+### Don't
+
+- Never uppercase Barlow display; never add a second accent color.
+- Never put cream text on orange (ink-on-fire is absolute); never a cream/paper register.
+- No drop shadow, no rounded surface (save nav dots), no gradient ground.
+- No serif companion; chrome is never Barlow.
+- Don't pack two display moments into one frame; don't blow a long line edge-to-edge — step down.
+
+## Aspect-Ratio Behavior
+
+| Treatment  | 16:9                       | 9:16                       | 1:1              |
+| ---------- | -------------------------- | -------------------------- | ---------------- |
+| Cover      | word left, lead below      | word top, lead below       | centered word    |
+| Statement  | display left               | display stacked taller     | display centered |
+| Stat Grid  | 3 across                   | 3 stacked                  | 2+1              |
+| Fadelist   | stack + title side-by-side | stack over title           | stack over title |
+| Pull Quote | mark + quote left          | mark top, quote below      | centered         |
+| Compare    | side-by-side panels        | stacked (dark over orange) | stacked          |
+
+`pad-x` holds tight on the short edge; re-step display so the one big line stays ≤78cqw and above the
+1.4cqw floor. Mono chrome stays Latin/digit-only.
+
+## Approved Entities
+
+No real customers, logos, or vendors are defined in the source — render any such mark as a
+placeholder (the dashed `img-placeholder` at 55cqh). The system supplies type and one color, not brands.
+
+## Numerals & Claims (hard rule)
+
+Never invent figures, percentages, dates, or counts at frame scale. Render slots as `— figure —`,
+`{metric}`, `NN%`. Stat-card numerals and bar heights carry placeholders until the script supplies
+them. Catalogue numbers (No. 01) are decorative chrome and may be sequential.
+
+## Pre-Render Self-Audit
+
+- **Squint** — exactly one display moment dominates; nothing competes.
+- **Silence** — declarative frames ~45–55% empty; only the stat grid runs dense.
+- **Register** — one register per frame; ink-on-fire on orange, cream on dark; no second hue.
+- **Type** — Barlow lowercase 900 negative-tracked, fit-to-measure; mono chrome uppercase 0.14em; ≥1.4cqw floor.
+- **Depth** — 0 shadow, 0 radius (save nav dots); 1px hairlines only.
+- **Bullets** — capped at three, orange `/` marker.
+- **Fabrication** — every numeral traces to the script, else placeholder.
+
+## Known Gaps
+
+- **Motion intentionally out of scope.** frame.md specifies composition only; the source's 0.8s deck slide + per-element entry animations are deck mechanics.
+- **Barlow + IBM Plex Mono via Google Fonts**; Noto Sans SC is the CJK fallback (the lowercase-display signal has no CJK equivalent — the two-register color system carries the identity, per the source).
+- **9:16 / 1:1 are guidance**; verify the one big line stays ≤78cqw and above the floor per ratio.
+- Bars, compare panels, and the dashed image placeholder are CSS-only; no external imagery is required.

skills/hyperframes-creative/frame-presets/broadside/caption-skin.html

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+<!--
+  Broadside — caption skin (preset-local source).
+
+  This is the preset's own lower-third karaoke caption look. product-launch-video's
+  Step 2 copies it into the project as caption-skin.html; captions.mjs then fills the
+  three reserved holes, wraps the fragment in a <template>, and writes
+  compositions/captions.html:
+    · the empty GROUPS array            → the engine's scene-aware word groups
+    · the 0 duration + 0 width/height   → real total + canvas size
+    · the empty data-brand-tokens style → :root tokens derived from the project's frame.md
+
+  Token contract — reference ONLY this fixed vocab (captions.mjs injects it from
+  frame.md, so the Step-2 brand overlay flows through; each var has a broadside literal
+  fallback for standalone preview):
+    --cap-ink · --cap-canvas · --cap-accent · --cap-accent-2 · --font-display ·
+    --font-body · --cap-band-top · --cap-band-height
+  Hooks (do not rename): .caption-group / .caption-word + states .is-active / .is-spoken,
+  root data-composition-id="captions", timeline at window.__timelines["captions"].
+  State changes use gsap.set({className}) (applied on the engine's frame-by-frame seek);
+  never tl.call() callbacks (seek does not fire them → wrong state on render).
+
+  Visual: a protest-poster lower third — an ink-black plate on a single 1px fire-orange
+  hairline, SHARP corners, NO shadow (broadside's plane is flat, never cast). Massive
+  lowercase Barlow 900 as graphic primitive, cream glyphs on ink. Upcoming words sit in
+  faint cream; the current word flips register — a hard flat fire-orange block with ink
+  reading on top (broadside's signature two-register flip, no blur), the brand's lone
+  accent; spoken words settle to solid cream, the orange block cleared.
+-->
+<script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
+
+<!-- captions.mjs injects the project's :root tokens here -->
+<style data-brand-tokens></style>
+
+<style>
+  #captions-root {
+    position: absolute;
+    inset: 0;
+    pointer-events: none;
+  }
+  .caption-layer {
+    position: absolute;
+    inset: 0;
+    z-index: 20;
+    pointer-events: none;
+  }
+  /* the keep-out band, from captionBand(H) — frame content stays above it */
+  .caption-stage {
+    position: absolute;
+    left: 0;
+    right: 0;
+    top: var(--cap-band-top, 900px);
+    height: var(--cap-band-height, 180px);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+  }
+  .caption-group {
+    /* every group is absolutely stacked over the SAME band — exactly one shown at a
+       time via opacity. Must be absolute: in-flow groups would lay out side-by-side. */
+    position: absolute;
+    inset: 0;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    opacity: 0;
+  }
+
+  /* THE ink-black plate — single 1px fire-orange hairline (broadside's lone accent),
+     SHARP corners (0 radius), NO shadow (the plane is flat) */
+  .caption-pill {
+    max-width: 80%;
+    padding: 18px 44px 22px;
+    background: var(--cap-ink, #111111);
+    border: 1px solid var(--cap-accent, #e85d26);
+    border-radius: 0;
+  }
+  .caption-line {
+    display: flex;
+    flex-wrap: wrap;
+    justify-content: center;
+    gap: 0.04em 0.3em;
+    font-family: var(--font-display, "Barlow"), system-ui, sans-serif;
+    font-weight: 900;
+    font-size: clamp(38px, 4.2vw, 56px);
+    line-height: 1.02;
+    letter-spacing: -0.03em;
+    text-transform: lowercase;
+  }
+
+  /* upcoming — faint cream, no block (massive lowercase Barlow 900 as graphic primitive) */
+  .caption-word {
+    display: inline-block;
+    padding: 0 0.08em;
+    color: color-mix(in srgb, var(--cap-canvas, #f0ece5) 42%, var(--cap-ink, #111111));
+  }
+  /* current word — THE register flip: a hard flat fire-orange block (box-shadow spread =
+     a sharp rectangle w/o layout shift; no blur), ink reading on top — the lone accent */
+  .caption-word.is-active {
+    color: var(--cap-ink, #111111);
+    background: var(--cap-accent, #e85d26);
+    box-shadow: 0 0 0 0.06em var(--cap-accent, #e85d26);
+  }
+  /* already spoken — solid cream, the orange block cleared */
+  .caption-word.is-spoken {
+    color: var(--cap-canvas, #f0ece5);
+    background: transparent;
+    box-shadow: none;
+  }
+
+  /* optional per-word accents (dormant until a word-classer tags them) */
+  /* brand / key term — fire-orange ink, the cream-on-ink register's only inflection */
+  .caption-word.cap-brand {
+    color: var(--cap-accent, #e85d26);
+  }
+  /* numerals / data — the IBM Plex Mono chrome voice, uppercase + tracked, recessed */
+  .caption-word.cap-num {
+    font-family: var(--font-body, "IBM Plex Mono"), ui-monospace, monospace;
+    font-weight: 500;
+    text-transform: uppercase;
+    letter-spacing: 0.06em;
+    color: color-mix(in srgb, var(--cap-canvas, #f0ece5) 72%, var(--cap-ink, #111111));
+  }
+  /* emphasis — a fire-orange hairline underline (no second hue; the lone accent again) */
+  .caption-word.cap-cta {
+    text-decoration: underline;
+    text-decoration-thickness: 2px;
+    text-decoration-color: var(--cap-accent-2, #e85d26);
+    text-underline-offset: 0.1em;
+  }
+
+  @media (max-aspect-ratio: 9/16) {
+    .caption-pill {
+      max-width: 92%;
+    }
+    .caption-line {
+      font-size: clamp(32px, 5.2vw, 46px);
+    }
+  }
+</style>
+
+<div
+  id="captions-root"
+  data-composition-id="captions"
+  data-timeline-locked
+  data-start="0"
+  data-duration="0"
+  data-fps="30"
+  data-width="0"
+  data-height="0"
+>
+  <div class="caption-layer" aria-hidden="true">
+    <div id="caption-stage" class="caption-stage"></div>
+  </div>
+</div>
+
+<script>
+  // captions.mjs injects the engine's scene-aware groups + real duration here.
+  var GROUPS = [];
+  var DURATION = 0;
+
+  (function () {
+    var stage = document.getElementById("caption-stage");
+
+    // build DOM: one .caption-group per group, .caption-word per word
+    GROUPS.forEach(function (group, g) {
+      var groupEl = document.createElement("div");
+      groupEl.className = "caption-group";
+      groupEl.id = "caption-group-" + g;
+      var pill = document.createElement("div");
+      pill.className = "caption-pill";
+      var line = document.createElement("div");
+      line.className = "caption-line";
+      (group.words || []).forEach(function (w, i) {
+        var span = document.createElement("span");
+        span.className = "caption-word";
+        span.id = "caption-word-" + g + "-" + i;
+        span.textContent = String(w.text);
+        line.appendChild(span);
+      });
+      pill.appendChild(line);
+      groupEl.appendChild(pill);
+      stage.appendChild(groupEl);
+    });
+
+    window.__timelines = window.__timelines || {};
+    var tl = gsap.timeline({ paused: true });
+
+    GROUPS.forEach(function (group, g) {
+      var groupEl = document.getElementById("caption-group-" + g);
+      var words = group.words || [];
+      var next = GROUPS[g + 1];
+      var isLast = g === GROUPS.length - 1;
+      var start = Math.max(0, Number(group.start));
+      var end = isLast ? DURATION : Math.min(Number(next.start), Number(group.end) + 0.3);
+      if (end <= start) end = start + 0.01;
+
+      // group on/off — exactly one group visible at a time
+      tl.set(groupEl, { opacity: 1 }, start);
+      tl.set(groupEl, { opacity: 0 }, end);
+
+      // 3-state karaoke via className SETS — seek-safe (gsap.set applies on the
+      // engine's frame-by-frame seek; .call callbacks would NOT fire).
+      words.forEach(function (w, i) {
+        var el = document.getElementById("caption-word-" + g + "-" + i);
+        var at = Math.max(start, Number(w.start));
+        tl.set(el, { className: "caption-word" }, start); // upcoming (also resets on reverse-seek)
+        tl.set(el, { className: "caption-word is-active" }, at); // current
+        tl.fromTo(el, { scale: 0.92 }, { scale: 1, duration: 0.1, ease: "power3.out" }, at);
+        if (i + 1 < words.length) {
+          var nextAt = Math.max(start, Number(words[i + 1].start));
+          tl.set(el, { className: "caption-word is-spoken" }, nextAt); // demote when next activates
+        }
+      });
+      if (words.length) {
+        var lastEl = document.getElementById("caption-word-" + g + "-" + (words.length - 1));
+        var lastSpoken = Math.min(end, Number(words[words.length - 1].end) + 0.1);
+        tl.set(lastEl, { className: "caption-word is-spoken" }, lastSpoken);
+      }
+    });
+
+    // full-span anchor so the sub-comp timeline spans the whole video
+    tl.to({}, { duration: DURATION }, 0);
+    window.__timelines["captions"] = tl;
+  })();
+</script>