chore: import upstream snapshot with attribution

skills/hyperframes-creative/frame-presets/blue-professional/FRAME.md

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+---
+version: alpha
+name: Blue Professional — Frame (video / frame layer)
+description: >
+  Video-first companion to Blue Professional's design.md. The unit is the frame (1920×1080). Atoms
+  are identical and sacred — the warm cream canvas, a single saturated cobalt (#1e2bfa) as the only
+  accent, the three-step gray text ladder, Space Grotesk (display/numerals/chrome) + Inter (body),
+  soft cobalt-tinted cards (4% fill / 20% border / 10–14px radius) with NO shadows, pill chrome, and
+  the cobalt progress bar. Composition + frame scale rewritten. 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:
+  bg: "#fdfae7"
+  primary: "#1e2bfa"
+  text: "#111111"
+  text-muted: "#6b6b6b"
+  text-light: "#9a9a9a"
+  accent-light: "rgba(30,43,250,0.08)"
+  accent-medium: "rgba(30,43,250,0.15)"
+  border: "rgba(30,43,250,0.2)"
+  card-bg: "rgba(30,43,250,0.04)"
+  positive: "#059669"
+  negative: "#dc2626"
+
+radii:
+  pill: "100px"
+  card-lg: "14px"
+  card-md: "12px"
+  card-sm: "10px"
+  bar: "6px"
+  circle: "50%"
+
+typography:
+  # — reading ramp (Inter body + Space Grotesk chrome) —
+  body:    { fontFamily: "Inter", cqw: 0.85, weight: 400, lineHeight: 1.6, color: "text-muted" }
+  h4-eyebrow:{ fontFamily: "Space Grotesk", cqw: 0.8, weight: 600, tracking: "0.08em", upper: true, color: "primary" }
+  tag:     { fontFamily: "Space Grotesk", px: 12, weight: 500, color: "primary" }
+  counter: { fontFamily: "Space Grotesk", px: 13, weight: 500, tracking: "0.05em", color: "text-muted" }
+  # — display / numerical ramp (Space Grotesk, near-black headings / cobalt numerals) —
+  h3:      { fontFamily: "Space Grotesk", cqw: 1.25, weight: 500, lineHeight: 1.3, tracking: "-0.02em", color: "text" }
+  stat-num:{ fontFamily: "Space Grotesk", cqw: 1.9, weight: 700, lineHeight: 1.0, color: "primary" }
+  blockquote:{ fontFamily: "Space Grotesk", cqw: 2.4, weight: 500, lineHeight: 1.35, color: "text" }
+  h2:      { fontFamily: "Space Grotesk", cqw: 2.6, weight: 600, lineHeight: 1.1, tracking: "-0.02em", color: "text" }
+  metric-value:{ fontFamily: "Space Grotesk", cqw: 3.0, weight: 700, lineHeight: 1.0, color: "primary" }
+  h1:      { fontFamily: "Space Grotesk", cqw: 4.2, weight: 700, lineHeight: 1.08, tracking: "-0.02em", color: "text" }
+  quote-mark:{ fontFamily: "Space Grotesk", cqw: 8.0, weight: 700, lineHeight: 0.5, color: "primary", opacity: 0.15 }
+
+spacing:
+  pad-x: "5cqw"
+  pad-y-top: "5cqw"
+  gap-cards: "1.4cqw"
+  accent-line: "60px × 4px"
+
+components:
+  card-tinted:
+    backgroundColor: "{colors.card-bg}"
+    border: "1.5px solid {colors.border}"
+    rounded: "{radii.card-lg}"
+    shadow: "none"
+    description: "Universal content card. Never solid-colored, never opaque-bordered, NO shadow."
+  metric-card:
+    backgroundColor: "{colors.card-bg}"
+    border: "1.5px solid {colors.border}"
+    rounded: "{radii.card-lg}"
+    typography: "{typography.metric-value} ({colors.primary}) + {typography.metric-label} + {typography.metric-desc}"
+    description: "+ optional inline ↑/↓ change chip ({colors.positive}/{colors.negative} text, no fill)."
+  tag-pill:
+    backgroundColor: "{colors.accent-light}"
+    textColor: "{colors.primary}"
+    rounded: "{radii.pill}"
+    typography: "{typography.tag}"
+    description: "Top-right of the slide-header."
+  cta-button:
+    backgroundColor: "{colors.primary}"
+    textColor: "{colors.bg}"
+    rounded: "{radii.pill}"
+    typography: "Space Grotesk 600"
+    shadow: "soft cobalt on hover only — the system's only shadow"
+    description: "The one solid element."
+  accent-line:
+    backgroundColor: "{colors.primary}"
+    size: "60×4, 2px radius"
+    description: "Above cover titles / eyebrow separators."
+  bar-track:
+    backgroundColor: "{colors.accent-light}"
+    fill: "{colors.primary} (display:block so width resolves)"
+    rounded: "{radii.bar}"
+    description: "28px track; fill carries the value."
+  step-circle:
+    backgroundColor: "{colors.primary}"
+    textColor: "{colors.bg}"
+    rounded: "50%"
+    size: "56px"
+    description: "Sequential steps fade opacity 1.0→0.85→0.7→0.55."
+  split-highlight:
+    backgroundColor: "{colors.accent-light}"
+    borderLeft: "4px solid {colors.primary}"
+    rounded: "{radii.card-md}"
+    description: "Inline pull-quote callout."
+  slide-header:
+    typography: "{typography.h4-eyebrow} (cobalt) left, tag-pill right; {typography.h2} below"
+    description: "Top band of every content frame."
+  atmosphere:
+    elements: "clipped diagonal cobalt-tint panel, 3×3 cobalt dot grid, concentric closing rings"
+    description: "Cover/closing only. Never on content frames."
+  progress-bar:
+    backgroundColor: "{colors.primary}"
+    size: "3px tall, bottom edge, width grows with index"
+    description: "Persistent progress strip."
+---
+
+# Blue Professional — Frame (video / frame layer)
+
+## Overview
+
+Blue Professional at frame scale is a **consulting-grade system: restraint with one strong
+commitment.** A warm cream canvas and a single saturated cobalt that carries every accent —
+eyebrow, metric, CTA, chart fill, progress bar. No secondary brand color, no pastels, just cream,
+cobalt, and a tight ladder of grays. The register is investment-research / McKinsey briefing:
+measured, data-dense without crowding, executive-readable at distance.
+
+The voice is two faces in fixed roles: **Space Grotesk** (display, every numeral, all chrome —
+eyebrows uppercase 0.08em) and **Inter** (body, muted gray, line 1.6). Headlines are near-black;
+cobalt is reserved for accent moments. Depth is **soft and tinted** — 4% cobalt card fills with 20%
+cobalt borders and 10–14px radii — never shadowed. The lack of harsh shadows is the premium signal.
+
+**Key characteristics at frame scale:**
+
+- **Warm cream ground** on every frame; **single cobalt** as the only accent.
+- **Space Grotesk** (display/numerals/chrome) + **Inter** (body) — near-black headlines, cobalt numerals.
+- **Tinted cards** — cobalt 4% fill, cobalt 20% 1.5px border, 10–14px radius, **no shadow**.
+- **Pill chrome** (100px) — tag pills + the one solid cobalt CTA; cobalt **progress bar**.
+- **Soft rounded corners everywhere** (no square corners save the progress bar).
+- **Atmosphere** (diagonal panel, dot grid, concentric rings) on cover/closing only.
+
+## The Frame
+
+### Frame Craft Bar
+
+Three eyeball tests gate every frame before any structural check:
+
+- **Squint** — one **near-black headline or cobalt numeral** dominates at 3–6× its neighbor.
+- **Silence** — content frames read **balanced, not crowded**; the **dashboard is the one dense exception**.
+- **Restraint** — a **single cobalt accent** carries everything; headlines stay near-black (never cobalt); no shadows (tinted cards do the lift); positive/negative inline-text only.
+- **Reference** — aim at an **investment-research / McKinsey quarterly briefing**; failure looks like a **heavy-outlined, multi-color dashboard**.
+
+- **Primary:** 1920×1080 (16:9). Display authored in **`cqw`** (`px ÷ 1920 × 100 = cqw`).
+- **Vertical:** 1080×1920 (9:16). **Square:** 1080×1080 (1:1).
+- **Safe area:** `pad-x` 5cqw; bottom reserves room for the counter + progress bar.
+
+**The container law (load-bearing).** Every frame ground sets `container-type: size`; ALL
+frame-relative units are `cqw`/`cqh` against it — never `vw`. Card radii stay px (10–14px); the
+pill radius stays 100px; borders stay 1–1.5px.
+
+## Colors
+
+Tokens identical to the source. `{colors.bg}` cream is the universal ground; `{colors.primary}`
+cobalt is the **only** accent — every eyebrow, numeral, CTA, chart fill, progress bar, and the 4px
+highlight left-rule. Headlines are `{colors.text}` near-black (never cobalt); body is
+`{colors.text-muted}`; tertiary is `{colors.text-light}`. Cards fill `{colors.card-bg}` (4%) with
+`{colors.border}` (20%) borders. `{colors.positive}`/`{colors.negative}` appear **only inline** on
+directional change chips — never as fills. **No second accent color.**
+
+## Typography
+
+Two ramps. The **reading ramp** (Inter body 0.85cqw muted; Space Grotesk eyebrow uppercase 0.08em
+cobalt) carries copy + chrome; the **display/numerical ramp** (Space Grotesk `h3` 1.25cqw → `h1`
+4.2cqw near-black; numerals `stat-num`/`metric-value` in cobalt) carries headings and figures.
+
+- **Legibility floor:** any load-bearing line ≥ **1.4cqw**; px chrome (tag/counter) is colophon only.
+- **Fit-to-measure:** size the headline to its length. Cap the block at **≤ 78cqw**; ≤3 words → `h1`; 4–6 → `h2`; 7+ → `h3`. Cobalt numerals scale `metric-value`→`stat-num` by card size.
+- **Headlines near-black, −0.02em**; **eyebrows cobalt, uppercase, 0.08em**; **numerals cobalt 600–700**; **body Inter 400 muted, line 1.6**. No italic, no uppercase body, no cobalt headline.
+
+## Depth & Surface
+
+Soft and tinted — never offset. Depth from:
+
+- **Tinted cards** — 4% cobalt fill + 20% cobalt 1.5px border + 10–14px radius reads as lifted without offset.
+- **Border-left accent** — the 4px cobalt rule on split-highlight blocks pulls a callout forward.
+- **Rounded corners** — the 10–14px radius is part of the softness; square corners break it.
+
+**Ceiling:** zero box-shadow on content (the only shadow is a soft cobalt CTA _hover_); no opaque cobalt borders; no harsh outlines.
+
+## Shapes
+
+- **100px** — tag pills, CTA, nav buttons (pill chrome).
+- **14/12/10px** — cards by size (large metric / standard stat / detail + mini).
+- **6px** — bar tracks + fills. **50%** — step circles, nav circles, dots, closing rings.
+- **0** — only the progress bar. No square-cornered content.
+
+## Components
+
+- **card-tinted / metric-card** — the universal soft-tint content cards (no shadow).
+- **tag-pill / cta-button / accent-line** — the cobalt pill chrome + the one solid CTA + the 60×4 rule.
+- **bar-track / step-circle / split-highlight** — cobalt data + sequence + callout patterns.
+- **slide-header** (eyebrow + tag pill) — the structural rhythm; **atmosphere** (diagonal/dots/rings) on cover/closing only; **progress-bar** on every frame.
+
+## Frame Treatments
+
+> Recipe: ground · container · composes · focal · chrome · accent · silence · Fixed/Free · density.
+> Atmosphere only on cover/closing; content frames carry the slide-header rhythm.
+
+### 1 · Cover (identity · move: diagonal accent · left)
+
+**Ground** cream + the clipped diagonal cobalt-tint panel (right ~36%) + a 3×3 cobalt dot grid.
+**Composes** accent-line, meta, h1, body sub. **Focal** a 2-line Space Grotesk `h1` near-black, left,
+under a cobalt accent-line + meta. **Chrome** counter + progress bar. **Accent** the cobalt line +
+diagonal panel. **Silence** the diagonal panel holds the right third. **Fixed** near-black h1, cobalt
+accents, atmosphere here only. **Free** title, meta. **Density** low.
+
+### 2 · Dashboard (data · move: 3-up metric grid · the dense frame)
+
+**Ground** cream, `pad-x`. **Composes** slide-header (eyebrow + tag-pill), h2, 3× metric/tinted card.
+**Focal** a row of tinted cards — cobalt `metric-value` + Inter label + muted desc + optional
+green/red change chip. **Chrome** eyebrow left, tag-pill right; progress bar. **Accent** the cobalt
+numerals. **Silence** tight — the density exception. **Fixed** 4% tint cards, 20% borders, no shadow,
+cobalt numerals. **Free** figures (from script), labels. **Density** dense-exception.
+
+### 3 · Bar Ranking (data · move: cobalt bars · left)
+
+**Ground** cream, `pad-x`. **Composes** eyebrow, h2, bar-track rows. **Focal** 3–5 labeled
+cobalt-fill bars on cobalt-8% tracks with cobalt percentages. **Chrome** eyebrow; progress bar.
+**Accent** the cobalt fills + figures. **Silence** moderate. **Fixed** 6px tracks, cobalt fills.
+**Free** rows, values (from script). **Density** standard.
+
+### 4 · Pull Quote (quote · move: concentric rings · centered)
+
+**Ground** cream, centered, with faint concentric closing-rings behind. **Composes** quote-mark,
+blockquote, cite. **Focal** a Space Grotesk `blockquote` near-black under a 15%-opacity cobalt
+quote-mark; an uppercase cobalt-muted cite beneath. **Accent** the faint rings + quote-mark. **Silence**
+~55%. **Fixed** near-black quote, soft rings. **Free** quote, cite. **Density** low.
+
+### 5 · Split + Highlight (content · move: asymmetric split · left)
+
+**Ground** cream, two columns. **Composes** eyebrow, h2, body, split-highlight block. **Focal** an
+Inter body column beside a cobalt-8% highlight block (4px cobalt left rule) carrying an inline pull
+quote. **Accent** the highlight's left rule. **Silence** generous gutter. **Fixed** tinted highlight,
+4px cobalt rule. **Free** body, callout. **Density** standard.
+
+### 6 · Closing / CTA (closer · move: centered rings + CTA)
+
+**Ground** cream + concentric closing-rings. **Composes** accent-line, h1, body, cta-button. **Focal**
+a Space Grotesk `h1` near-black, centered, with the one solid cobalt `cta-button` pill below. **Accent**
+the CTA + rings. **Silence** ~60%. **Fixed** one CTA, near-black h1, soft rings. **Free** sign-off, CTA
+label. **Density** low.
+
+## Composition Rules
+
+### Do
+
+- Start every frame on **warm cream**; let **cobalt carry every accent** (eyebrow, numeral, CTA, bar, progress).
+- Set headlines **near-black, −0.02em**; eyebrows **cobalt uppercase 0.08em**; numerals **cobalt 600–700**.
+- Use **tinted cards** (4% fill, 20% border, 10–14px radius, no shadow); body Inter 400 muted, line 1.6.
+- Keep all chrome **pill-shaped (100px)**; one solid cobalt CTA per closing frame.
+- Reserve **atmosphere** (diagonal panel, dots, rings) for cover/closing; content frames keep the slide-header rhythm.
+- Lean left on cover/dashboard/split, centered on quote/closer.
+
+### Don't
+
+- No second accent color; no cobalt headlines.
+- No drop shadows on content (only the soft cobalt CTA hover); no opaque cobalt borders.
+- No square corners (save the progress bar); no font substitutes; no uppercase body.
+- Don't use the green/red change chips as general accents — directional comparisons only.
+- Don't fill space with heavier borders — add substance; don't blow a headline edge-to-edge.
+
+## Aspect-Ratio Behavior
+
+| Treatment         | 16:9                       | 9:16                           | 1:1                      |
+| ----------------- | -------------------------- | ------------------------------ | ------------------------ |
+| Cover             | title left, diagonal right | title top, diagonal band below | title upper, dots corner |
+| Dashboard         | 3 cards across             | 3 stacked                      | 2×2                      |
+| Bar Ranking       | 3–5 bars                   | 3–5 bars (tighter)             | 3 bars                   |
+| Pull Quote        | centered, rings behind     | centered, taller               | centered                 |
+| Split + Highlight | side-by-side               | stacked                        | stacked                  |
+| Closing / CTA     | centered + CTA             | centered + CTA                 | centered + CTA           |
+
+`pad-x` holds on the short edge; re-step display above the 1.4cqw floor. The diagonal cover panel
+becomes a top/bottom band on 9:16. Numerals stay Latin Arabic digits in CJK builds.
+
+## Approved Entities
+
+No real customers, logos, or vendors are defined in the source — render any such mark as a
+placeholder. Figures, metrics, and quotes are content; the system supplies cream + cobalt + grays.
+
+## Numerals & Claims (hard rule)
+
+Never invent figures, financials, percentages, or dates at frame scale. Render slots as `— figure —`,
+`{metric}`, `+NN%`, `↑ —`. Metric cards, bar values, and stat cells especially carry placeholders
+until the script supplies them. Directional chips require a real comparison from the script.
+
+## Pre-Render Self-Audit
+
+- **Squint** — one near-black headline or cobalt numeral dominates per frame.
+- **Silence** — content frames balanced, not crowded; only the dashboard runs dense.
+- **Single accent** — cobalt only; headlines near-black; positive/negative inline only.
+- **Type** — Space Grotesk headings −0.02em near-black, cobalt eyebrows 0.08em + numerals; Inter body muted line 1.6; ≥1.4cqw floor.
+- **Depth** — tinted cards (no shadow), soft rounded corners, 20% cobalt borders; no square content corners.
+- **Anchor** — left on cover/dashboard/split, centered on quote/closer; atmosphere on cover/closing only.
+- **Fabrication** — every numeral traces to the script, else placeholder.
+
+## Known Gaps
+
+- **Motion intentionally out of scope.** frame.md specifies composition only; the source's 500ms translateX transitions + bar-fill animations are deck mechanics.
+- **Space Grotesk + Inter via Google Fonts.** CJK pairing (Noto Sans SC 700 display / Noto Serif SC 400 body) carries over; the eyebrow's uppercase+tracking signal weakens in CJK — pair it with the accent-line.
+- **9:16 / 1:1 are guidance**; verify the floor and that the diagonal panel reflows to a band.
+- Diagonal panel (clip-path), dot grid, concentric rings, and bars are CSS-only; no external imagery is required.

skills/hyperframes-creative/frame-presets/blue-professional/caption-skin.html

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+<!--
+  Blue Professional — 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 blue-professional
+  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 soft cobalt-tinted card on warm cream — a 4% cobalt fill inside a 1.5px
+  20%-cobalt border, soft 14px rounded corners, NO shadow (the system's premium signal
+  is the absence of cast depth; the tinted card does the lift). Space Grotesk, sentence
+  case, near-black glyphs. Upcoming words sit in muted gray; the current word becomes a
+  solid cobalt chip — the brand's signature single-accent gesture, a pill-rounded fill
+  with cream reading on top; spoken words settle to near-black ink, chip 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 tinted card — 4% cobalt fill, 1.5px 20%-cobalt border, soft 14px corners,
+     NO shadow (the tinted card does the lift; cast depth is forbidden) */
+  .caption-pill {
+    max-width: 78%;
+    padding: 20px 44px 24px;
+    background: color-mix(in srgb, var(--cap-accent, #1e2bfa) 4%, var(--cap-canvas, #fdfae7));
+    border: 1.5px solid color-mix(in srgb, var(--cap-accent, #1e2bfa) 20%, transparent);
+    border-radius: 14px;
+  }
+  .caption-line {
+    display: flex;
+    flex-wrap: wrap;
+    justify-content: center;
+    gap: 0.1em 0.34em;
+    font-family: var(--font-display, "Space Grotesk"), system-ui, sans-serif;
+    font-weight: 600;
+    font-size: clamp(40px, 4.4vw, 58px);
+    line-height: 1.16;
+    letter-spacing: -0.02em;
+  }
+
+  /* upcoming — muted gray, no chip */
+  .caption-word {
+    display: inline-block;
+    padding: 0 0.18em;
+    border-radius: 0.32em;
+    color: color-mix(in srgb, var(--cap-ink, #111111) 52%, var(--cap-canvas, #fdfae7));
+  }
+  /* current word — THE solid cobalt chip (the single-accent gesture; pill-rounded
+     fill, NO shadow), cream reading on top */
+  .caption-word.is-active {
+    color: var(--cap-canvas, #fdfae7);
+    background: var(--cap-accent, #1e2bfa);
+    box-shadow: none;
+  }
+  /* already spoken — solid near-black ink, chip cleared */
+  .caption-word.is-spoken {
+    color: var(--cap-ink, #111111);
+    background: transparent;
+    box-shadow: none;
+  }
+
+  /* optional per-word accents (dormant until a word-classer tags them) */
+  /* brand / key term — cobalt, the system's one accent on a key word */
+  .caption-word.cap-brand {
+    color: var(--cap-accent, #1e2bfa);
+  }
+  /* numerals / data — cobalt 700, the figure voice */
+  .caption-word.cap-num {
+    font-family: var(--font-display, "Space Grotesk"), system-ui, sans-serif;
+    font-weight: 700;
+    color: var(--cap-accent, #1e2bfa);
+  }
+  /* emphasis — a directional-red hairline underline (inline only, never a fill) */
+  .caption-word.cap-cta {
+    text-decoration: underline;
+    text-decoration-thickness: 2px;
+    text-decoration-color: var(--cap-accent-2, #dc2626);
+    text-underline-offset: 0.1em;
+  }
+
+  @media (max-aspect-ratio: 9/16) {
+    .caption-pill {
+      max-width: 92%;
+    }
+    .caption-line {
+      font-size: clamp(34px, 5.4vw, 48px);
+    }
+  }
+</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: 0.985 }, { scale: 1, duration: 0.18, ease: "power1.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>