> ## Documentation Index
> Fetch the complete documentation index at: https://hyperframes.heygen.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Cuboid Carousel

> A chain of bevelled cuboids rides a travelling wave as a content carousel.

export const InstallCommand = ({command, item}) => {
  const [copied, setCopied] = React.useState(false);
  const [tuned, setTuned] = React.useState("");
  React.useEffect(() => {
    if (!item) return;
    const read = () => {
      try {
        const raw = new URLSearchParams(window.location.search).get(`vars-${item}`);
        if (!raw) return setTuned("");
        const parsed = JSON.parse(raw);
        if (!parsed || typeof parsed !== "object" || Array.isArray(parsed)) return setTuned("");
        if (Object.keys(parsed).length === 0) return setTuned("");
        setTuned(` --vars '${JSON.stringify(parsed)}'`);
      } catch {
        setTuned("");
      }
    };
    read();
    window.addEventListener("hf-vars-changed", read);
    window.addEventListener("popstate", read);
    return () => {
      window.removeEventListener("hf-vars-changed", read);
      window.removeEventListener("popstate", read);
    };
  }, [item]);
  const fullCommand = `${command}${tuned}`;
  const copy = async () => {
    try {
      if (navigator.clipboard && window.isSecureContext) {
        await navigator.clipboard.writeText(fullCommand);
      } else {
        const previous = document.activeElement;
        const scratch = document.createElement("textarea");
        scratch.value = fullCommand;
        scratch.setAttribute("readonly", "");
        scratch.style.position = "fixed";
        scratch.style.opacity = "0";
        document.body.appendChild(scratch);
        scratch.select();
        document.execCommand("copy");
        document.body.removeChild(scratch);
        previous?.focus?.();
      }
      setCopied(true);
      setTimeout(() => setCopied(false), 2000);
    } catch {}
  };
  return <div className="hf-install-command not-prose my-4 flex items-stretch overflow-hidden rounded-xl border border-zinc-200 bg-zinc-50 dark:border-zinc-800 dark:bg-zinc-900">
      <code className="flex-1 overflow-x-auto whitespace-nowrap border-r border-zinc-200 px-4 py-3 font-mono text-sm text-zinc-800 dark:border-zinc-800 dark:text-zinc-100">
        {fullCommand}
      </code>
      <button type="button" onClick={copy} data-copied={copied ? "true" : "false"} aria-label={`Copy ${command} to the clipboard`} className="hf-install-copy">
        <svg className="hf-install-copy-clipboard" xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 18 18" fill="none" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" strokeLinejoin="round" aria-hidden="true">
          <path d="M14.25 5.25H7.25C6.14543 5.25 5.25 6.14543 5.25 7.25V14.25C5.25 15.3546 6.14543 16.25 7.25 16.25H14.25C15.3546 16.25 16.25 15.3546 16.25 14.25V7.25C16.25 6.14543 15.3546 5.25 14.25 5.25Z" />
          <path d="M2.80103 11.998L1.77203 5.07397C1.61003 3.98097 2.36403 2.96397 3.45603 2.80197L10.38 1.77297C11.313 1.63397 12.19 2.16297 12.528 3.00097" />
        </svg>
        <svg className="hf-install-copy-check" xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 18 18" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" aria-hidden="true">
          <path d="M2.75 9.5L6.5 13.25L15.25 4.5" />
        </svg>
      </button>
      <span className="hf-install-copy-status" role="status" aria-live="polite">
        {copied ? "Copied" : ""}
      </span>
    </div>;
};

export const CatalogSlot = ({slot, children}) => <div data-slot={slot} className="prose prose-gray dark:prose-invert">
    {children}
  </div>;

export const CatalogDetail = ({previewSrc, compositionId, compositionSrc, variables = [], title, description, meta = {}, about, attribution, rawUrl, video, poster, webgpu, needsFlag, hasCode, children}) => {
  const SHIKI = {
    punct: {
      color: "rgb(31, 35, 40)",
      "--shiki-dark": "#808080"
    },
    tag: {
      color: "rgb(17, 99, 41)",
      "--shiki-dark": "#569CD6"
    },
    attr: {
      color: "rgb(5, 80, 174)",
      "--shiki-dark": "#9CDCFE"
    },
    equals: {
      color: "rgb(31, 35, 40)",
      "--shiki-dark": "#D4D4D4"
    },
    value: {
      color: "rgb(10, 48, 105)",
      "--shiki-dark": "#CE9178"
    }
  };
  const CSS = `
.hf-ve {
  --ve-fg: #18181b;
  --ve-muted: #71717a;
  --ve-line: #e4e4e7;
  --ve-surface: #ffffff;
  --ve-sunken: #fafafa;
  --ve-hover: #f4f4f5;
  --ve-on-bg: #18181b;
  --ve-on-fg: #ffffff;
  --ve-ring: rgba(24, 24, 27, 0.14);
  --ve-danger: #b42318;
}
:where(html.dark) .hf-ve {
  --ve-fg: #f4f4f5;
  --ve-muted: #a1a1aa;
  --ve-line: #27272a;
  --ve-surface: #18181b;
  --ve-sunken: #131316;
  --ve-hover: #27272a;
  --ve-on-bg: #f4f4f5;
  --ve-on-fg: #18181b;
  --ve-ring: rgba(244, 244, 245, 0.2);
  --ve-danger: #ff9d95;
}

.hf-ve-tabs {
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--ve-line);
  border-radius: 9999px;
  background: var(--ve-sunken);
}
.hf-ve-tab {
  padding: 4px 12px;
  border-radius: 9999px;
  font-size: 12px;
  font-weight: 500;
  color: var(--ve-muted);
  background: transparent;
}
.hf-ve-tab[data-on="true"] {
  color: var(--ve-fg);
  background: var(--ve-hover);
}
.hf-ve-tab:focus:not(:focus-visible) { outline: none; box-shadow: none; }
.hf-ve-tab:hover:not([data-on="true"]) { color: var(--ve-fg); }

/* Not a grid. A grid row is as tall as its tallest cell, so a five-line snippet
   sat in the preview's 16:9 box with 300px of dead area under it. The inactive
   pane is taken out of flow instead — and stretches left/right rather than to
   inset 0, so the iframe keeps its own height. An iframe resized on every tab
   switch reflows the composition running inside it. */
.hf-ve-frame { position: relative; }
.hf-ve-cell { min-width: 0; }
.hf-ve-cell[data-on="false"] {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  visibility: hidden;
  pointer-events: none;
}
.hf-ve-preview {
  overflow: hidden;
  border: 1px solid var(--ve-line);
  border-radius: 12px;
}
/* CodeBlock carries the page margins (mt-5 mb-8) that separate it from prose,
   which is dead space inside a tab. Element plus two classes out-specifies a
   Tailwind utility without !important. */
.hf-ve-cell > div.code-block { margin: 0; }
/* The snippet wraps; the source does not.
   A value the reader has to read in full should not hide half of itself off the
   right edge, so the snippet pane wraps — what \`\`\`html wrap does for a fence.
   The width reset is the half that matters: the block's own <code> is sized to
   max-content, and content that never meets an edge never wraps.
   Source is left to scroll sideways like every other code block on the site.
   Wrapping it breaks its indentation, and a comment paragraph re-flowed to a
   narrow column reads worse than one the reader can scroll. */
.hf-ve-snippet .shiki,
.hf-ve-snippet .shiki code {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
/* A composition source runs to several hundred lines, and an un-capped tab
   pushes the Customize panel off the screen. The cap goes on the scroll box
   rather than the block, so the filename and its copy button stay put; and it
   is a max-height, so a short source still hugs its own content and the dead
   area under it stays gone. */
.hf-ve-cell .code-block pre {
  max-height: 460px;
  overflow: auto;
}
/* Four classes deep because the rule being answered is three
   (\`html:not(.dark) .codeblock-light pre.shiki code\`), and a shorter selector
   silently loses to it. */
.hf-ve .hf-ve-snippet .code-block pre.shiki code {
  width: auto;
  min-width: 0;
}

.hf-ve-panel {
  margin-top: 12px;
  border: 1px solid var(--ve-line);
  border-radius: 12px;
}
.hf-ve-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  border-bottom: 1px solid var(--ve-line);
}
.hf-ve-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ve-muted);
}
.hf-ve-grid {
  display: grid;
  gap: 16px 28px;
  padding: 16px;
}
@media (min-width: 640px) {
  .hf-ve-grid { grid-template-columns: 1fr 1fr; }
}
.hf-ve-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
}
.hf-ve-label { font-size: 14px; font-weight: 500; color: var(--ve-fg); }
.hf-ve-value {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--ve-muted);
}
.hf-ve-desc {
  margin: 6px 0 0;
  font-size: 12px;
  line-height: 1.45;
  color: var(--ve-muted);
}

.hf-ve-btn {
  padding: 4px 10px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 500;
  color: var(--ve-muted);
  background: transparent;
}
.hf-ve-btn:hover:not(:disabled) { color: var(--ve-fg); background: var(--ve-hover); }
.hf-ve-btn:disabled { opacity: 0.4; cursor: default; }

.hf-ve-field {
  width: 100%;
  height: 36px;
  padding: 0 12px;
  border: 1px solid var(--ve-line);
  border-radius: 8px;
  font-size: 14px;
  line-height: 1.4;
  color: var(--ve-fg);
  background: var(--ve-surface);
}
.hf-ve-field::placeholder { color: var(--ve-muted); }
.hf-ve-mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; }

/* Focus, once, for every control here. A ring outside the border rather than a
   border colour alone: the border already carries the resting state, so
   recolouring it is a change a reader can miss. Nothing shifts, because the
   ring is a shadow. :focus-visible, so a pointer click does not light it up. */
.hf-ve-field:focus-visible,
.hf-ve-seg-btn:focus-visible,
.hf-ve-tab:focus-visible,
.hf-ve-btn:focus-visible,
.hf-ve-switch:focus-visible,
.hf-ve-swatch:focus-visible {
  outline: none;
  border-color: var(--ve-on-bg);
  box-shadow: 0 0 0 3px var(--ve-ring);
}
/* A range is a track, and ringing the track rings a pill the width of the
   panel. The thumb is the part that has focus, so the thumb is what says so. */
.hf-ve-range:focus-visible { outline: none; }
.hf-ve-range:focus-visible::-webkit-slider-thumb { box-shadow: 0 0 0 4px var(--ve-ring); }
.hf-ve-range:focus-visible::-moz-range-thumb { box-shadow: 0 0 0 4px var(--ve-ring); }
/* Safari still fires :focus for a click on a button, so the pair is kept. */
.hf-ve-field:focus { outline: none; border-color: var(--ve-on-bg); }

/* The enum branch above sends anything past four options here. No shipped item
   does today (every enum in the registry has two to four), so this is styled to
   the point of not looking foreign and no further — the chevron is one neutral
   grey rather than a per-theme pair, because a data URI cannot read a token. */
.hf-ve-select {
  appearance: none;
  -webkit-appearance: none;
  padding-right: 34px;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' stroke='%2389898f' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m4 6 4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  cursor: pointer;
}

.hf-ve-seg {
  display: flex;
  padding: 2px;
  border: 1px solid var(--ve-line);
  border-radius: 8px;
}
.hf-ve-seg-btn {
  flex: 1;
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  color: var(--ve-muted);
  background: transparent;
}
.hf-ve-seg-btn:hover:not([data-on="true"]) { color: var(--ve-fg); background: var(--ve-hover); }
.hf-ve-seg-btn[data-on="true"] { color: var(--ve-on-fg); background: var(--ve-on-bg); }

/* A range, rebuilt. \`accent-color\` alone leaves the platform's hairline track,
   which reads as an unstyled browser part next to everything else here. Each
   engine names its parts differently and shares none of them, so the same
   track and thumb are written twice; a selector either engine cannot parse
   drops the whole rule, which is why they are never grouped. */
.hf-ve-range {
  width: 100%;
  height: 20px;
  appearance: none;
  -webkit-appearance: none;
  border: 0;
  border-radius: 9999px;
  background: transparent;
  cursor: pointer;
}
/* --ve-fill is set per render: painting progress on a native track means a
   two-stop gradient, and only the component knows where the value sits. */
.hf-ve-range::-webkit-slider-runnable-track {
  height: 6px;
  border-radius: 9999px;
  background: linear-gradient(
    to right,
    var(--ve-on-bg) var(--ve-fill, 0%),
    var(--ve-line) var(--ve-fill, 0%)
  );
}
.hf-ve-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  margin-top: -5px;
  border: 2px solid var(--ve-on-bg);
  border-radius: 9999px;
  background: var(--ve-surface);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.14);
}
.hf-ve-range::-moz-range-track { height: 6px; border-radius: 9999px; background: var(--ve-line); }
.hf-ve-range::-moz-range-progress { height: 6px; border-radius: 9999px; background: var(--ve-on-bg); }
.hf-ve-range::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border: 2px solid var(--ve-on-bg);
  border-radius: 9999px;
  background: var(--ve-surface);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.14);
}
/* Hover reads on the part being aimed at rather than on the whole strip: a
   track that darkens under the pointer says "click me and the thumb comes
   here", which is what a native range actually does. */
.hf-ve-range:hover::-webkit-slider-thumb { border-color: var(--ve-fg); }
.hf-ve-range:hover::-moz-range-thumb { border-color: var(--ve-fg); }

/* The number control, and the three things it used to leave unsaid.
 *
 * It could not say where the range ends, so a reader dragging \`stroke_width\`
 * had no idea whether 12 was nearly nothing or nearly everything: the ends now
 * carry min and max.
 *
 * It could not say where the author left the knob, which is the one reference
 * point a panel built around deviating from the author's choice needs: a mark
 * on the track is the default, and a double click puts the value back on it.
 *
 * And it printed the value in the label row, a fixed distance from a thumb that
 * moves, so reading a drag meant looking in two places at once. The value rides
 * the thumb instead.
 *
 * Still a real <input type="range">. Every custom slider on the web reimplements
 * keyboard stepping, touch, and the screen-reader contract, and most of them do
 * one of the three badly; none of what is added here needed the element
 * replaced. Nothing moves that a finger is not moving: the value tracks the
 * pointer because it is the pointer's own readout, and the only transition is
 * the colour one every other control here shares. */
.hf-ve-slider {
  display: grid;
  gap: 1px;
}
.hf-ve-ruler {
  position: relative;
  height: 17px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  line-height: 17px;
  color: var(--ve-muted);
}
.hf-ve-bound {
  position: absolute;
  top: 0;
}
.hf-ve-bound[data-end="min"] { left: 0; }
.hf-ve-bound[data-end="max"] { right: 0; }
/* An end steps aside rather than being overprinted by the value arriving on
   top of it. Visibility, not opacity: there is no fade here, the label is
   either the thing being read or it is out of the way. */
.hf-ve-ruler[data-near="min"] .hf-ve-bound[data-end="min"],
.hf-ve-ruler[data-near="max"] .hf-ve-bound[data-end="max"] {
  visibility: hidden;
}
/* translateX is centring, not motion: the readout is as wide as its own digits
   and has to hang half of that either side of the thumb. */
.hf-ve-readout {
  position: absolute;
  top: 0;
  left: calc(var(--ve-fill, 0%) + var(--ve-fill-nudge, 0px));
  transform: translateX(-50%);
  color: var(--ve-fg);
  font-weight: 600;
  white-space: nowrap;
}
.hf-ve-track {
  position: relative;
  display: block;
}
.hf-ve-range { display: block; }
.hf-ve-default {
  position: absolute;
  top: 5px;
  left: calc(var(--ve-default, 50%) + var(--ve-default-nudge, 0px));
  width: 2px;
  height: 10px;
  margin-left: -1px;
  border-radius: 1px;
  background: var(--ve-muted);
  pointer-events: none;
}

/* A switch, for the boolean type. It used to fall through to the text input at
   the end of control(), which asked the reader to type the word "true". */
.hf-ve-switch {
  display: inline-flex;
  align-items: center;
  width: 40px;
  height: 24px;
  padding: 2px;
  border: 1px solid var(--ve-line);
  border-radius: 9999px;
  background: var(--ve-sunken);
  cursor: pointer;
}
.hf-ve-switch[data-on="true"] { border-color: var(--ve-on-bg); background: var(--ve-on-bg); }
.hf-ve-switch-dot {
  width: 18px;
  height: 18px;
  border-radius: 9999px;
  background: var(--ve-surface);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.18);
}
.hf-ve-switch[data-on="true"] .hf-ve-switch-dot {
  background: var(--ve-on-fg);
  transform: translateX(16px);
}

/* The SVG import control: the same text field, with a way to fill it.
 *
 * The whole block is the drop target, not just the field, so a file let go over
 * the button lands too. It says so by taking the same border colour a focused
 * field takes, which is the one feedback channel this panel has left.
 *
 * A bare <input type="file"> is unlabelled, unstyleable and reads as "No file
 * chosen" next to controls that carry their own value, so the real input is
 * taken out of the layout and the tab order and a button in front of it is what
 * a reader sees and what a keyboard reaches. Hidden with size and opacity
 * rather than display:none, because an input that is not rendered at all is one
 * some browsers decline to open a picker for. */
.hf-ve-drop {
  display: grid;
  gap: 8px;
}
.hf-ve-drop[data-over="true"] .hf-ve-dropzone {
  border-color: var(--ve-on-bg);
  border-style: solid;
}

/* The import is the action almost everyone wants: a reader arrives with a
   shape, not with path data. A dashed target reads as "put a file here" on
   sight, where a button beneath a field of coordinates read as an afterthought
   to the coordinates. */
.hf-ve-dropzone {
  display: grid;
  justify-items: center;
  gap: 6px;
  padding: 18px 12px;
  border: 1px dashed var(--ve-line);
  border-radius: 10px;
  background: var(--ve-surface);
  text-align: center;
}
.hf-ve-dropzone .hf-ve-btn {
  padding: 7px 16px;
  font-size: 13px;
  color: var(--ve-fg);
  border-color: var(--ve-line);
  background: var(--ve-bg);
}
.hf-ve-dropzone .hf-ve-btn:hover:not(:disabled) { background: var(--ve-hover); }

/* Path data stays reachable, but a reader has to ask for it. A native details
   element rather than our own toggle, so it opens with the keyboard and is
   announced as expandable without any wiring. */
.hf-ve-advanced > summary {
  font-size: 12px;
  color: var(--ve-muted);
  cursor: pointer;
  list-style: none;
  padding: 2px 0;
}
.hf-ve-advanced > summary::-webkit-details-marker { display: none; }
.hf-ve-advanced > summary::before { content: "▸ "; }
.hf-ve-advanced[open] > summary::before { content: "▾ "; }
.hf-ve-advanced > summary:hover { color: var(--ve-fg); }
.hf-ve-advanced .hf-ve-field { margin-top: 6px; }
.hf-ve-file {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}
.hf-ve-note {
  margin: 0;
  min-width: 0;
  font-size: 12px;
  line-height: 1.4;
  color: var(--ve-muted);
}
.hf-ve-note[data-tone="error"] { color: var(--ve-danger); }
.hf-ve-note[data-tone="ok"] { color: var(--ve-fg); }

.hf-ve-swatch {
  width: 40px;
  height: 32px;
  flex-shrink: 0;
  padding: 2px;
  border: 1px solid var(--ve-line);
  border-radius: 8px;
  background: var(--ve-surface);
  cursor: pointer;
}

/* Nothing here moves.
 *
 * A press-down scale on every button and field, a scale-in on the tab panes, a
 * springing switch knob and a growing slider thumb were all flourish: the
 * control had already told you what it did by changing colour, and the motion
 * was a second, slower answer to a question already settled. What is left is
 * one colour transition, short enough to read as immediate and long enough not
 * to flicker. A control here may change colour; it does not move.
 *
 * Which is also why there is no prefers-reduced-motion block any more. There is
 * no motion left to reduce. */
.hf-ve-tint {
  transition:
    background-color 100ms ease,
    border-color 100ms ease,
    color 100ms ease;
}

.hf-ve-head-title { margin: 8px 0 28px; }
.hf-ve-head-title h1 { margin: 0; font-size: 44px; line-height: 1.1; font-weight: 700; letter-spacing: -0.02em; color: var(--ve-fg); }
.hf-ve-head-title p { margin: 12px 0 0; font-size: 18px; line-height: 1.5; color: var(--ve-muted); max-width: 70ch; }
@media (max-width: 640px) { .hf-ve-head-title h1 { font-size: 32px; } }
/* Item page anatomy: bar, stage beside Tune, tabs, tab body. */
.hf-ve-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 20px;
  margin-bottom: 16px;
}
.hf-ve-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 18px;
  font-size: 14px;
  color: var(--ve-muted);
}
.hf-ve-meta b { color: var(--ve-fg); font-weight: 600; }
.hf-ve-badge {
  padding: 2px 10px;
  border-radius: 9999px;
  font-size: 12px;
  background: var(--ve-hover);
}
.hf-ve-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.hf-ve-action {
  display: inline-grid;
  align-items: center;
  justify-items: center;
  padding: 8px 14px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ve-fg);
  background: var(--ve-hover);
  text-decoration: none;
  border: 0;
  cursor: pointer;
}
.hf-ve-action-label { grid-area: 1 / 1; }
.hf-ve-action-label[data-shown="false"] { visibility: hidden; }
.hf-ve-action:hover:not(:disabled) { background: var(--ve-line); }
.hf-ve-action:disabled { opacity: 0.4; cursor: default; }
.hf-ve-tune-foot .hf-ve-action { justify-content: center; white-space: nowrap; }
.hf-ve-action[data-primary="true"] { color: var(--ve-on-fg); background: var(--ve-on-bg); }
.hf-ve-action[data-primary="true"]:hover:not(:disabled) { background: var(--ve-on-bg); opacity: 0.88; }
.hf-ve-main { display: grid; gap: 16px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 1024px) {
  .hf-ve-main[data-tune="true"] { grid-template-columns: minmax(0, 1fr) 340px; }
}
.hf-ve-stage {
  overflow: hidden;
  border: 1px solid var(--ve-line);
  border-radius: 14px;
  background: var(--ve-surface);
}
.hf-ve-stage .hf-ve-preview { border: 0; border-radius: 0; }
.hf-ve-caption { padding: 10px 16px; font-size: 13px; color: var(--ve-muted); }
.hf-ve-caption span + span { margin-left: 16px; }
.hf-ve-tune {
  position: relative;
  min-height: 320px;
  border: 1px solid var(--ve-line);
  border-radius: 14px;
  background: var(--ve-surface);
}
.hf-ve-tune-inner { display: flex; flex-direction: column; max-height: 520px; }
@media (min-width: 1024px) {
  .hf-ve-tune-inner { position: absolute; inset: 0; max-height: none; }
}
.hf-ve-tune-head {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--ve-line);
  font-weight: 600;
}
.hf-ve-tune-head small { font-weight: 400; font-size: 13px; color: var(--ve-muted); }
.hf-ve-tune-list {
  flex: 1;
  min-height: 0;
  overflow: auto;
  overscroll-behavior: contain;
  display: grid;
  gap: 16px;
  padding: 16px;
  align-content: start;
  mask-image: linear-gradient(to bottom, transparent 0, #000 12px, #000 calc(100% - 12px), transparent 100%);
}
.hf-ve-tune-foot {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 8px;
  padding: 16px;
  border-top: 1px solid var(--ve-line);
}
.hf-ve-tabs-row { margin: 20px 0 0 16px; }
.hf-ve-tabs-row .hf-ve-tab { padding: 6px 16px; font-size: 14px; }
.hf-ve-tabs-row .hf-ve-tab small { margin-left: 6px; font-weight: 400; opacity: 0.7; }
.hf-ve-body { padding: 2rem 0 0 16px; }
.hf-ve-install { margin: 0 0 28px; }
.hf-ve-install-title { margin: 0 0 12px; font-size: 24px; line-height: 1.3; font-weight: 600; letter-spacing: -0.01em; color: var(--ve-fg); }
.hf-ve-about h3 { margin: 0 0 8px; font-size: 16px; font-weight: 600; }
.hf-ve-about p { margin: 0 0 12px; line-height: 1.6; max-width: 72ch; }
.hf-ve-about .hf-ve-attr { font-size: 14px; color: var(--ve-muted); }
.hf-ve-about .hf-ve-attr a { color: var(--ve-fg); text-decoration: underline; }
.hf-ve-body-pane[hidden] { display: none; }
.hf-ve-slots > [data-slot] { display: none; }
.hf-ve-slots[data-tab="code"] > [data-slot="code"],
.hf-ve-slots[data-tab="docs"] > [data-slot="docs"] { display: block; }
.hf-ve-body-pane .code-block pre,
.hf-ve-slots [data-slot="code"] pre { max-height: 560px; overflow: auto; }
@media (max-width: 640px) {
  .hf-ve-actions { width: 100%; }
  .hf-ve-action { flex: 1 1 calc(50% - 8px); justify-content: center; }
}

`;
  const isSvgPathData = value => typeof value === "string" && (/^\s*[Mm]\s*-?[\d.]/).test(value);
  const parsePathData = d => {
    const source = String(d);
    const arity = {
      M: 2,
      L: 2,
      H: 1,
      V: 1,
      C: 6,
      S: 4,
      Q: 4,
      T: 2,
      A: 7,
      Z: 0
    };
    const commands = [];
    let at = 0;
    let code = "";
    const separator = () => {
      while (at < source.length && (/[\s,]/).test(source[at])) at += 1;
    };
    const digits = () => {
      while (at < source.length && source[at] >= "0" && source[at] <= "9") at += 1;
    };
    const number = () => {
      separator();
      const start = at;
      if (source[at] === "+" || source[at] === "-") at += 1;
      digits();
      if (source[at] === ".") {
        at += 1;
        digits();
      }
      if (source[at] === "e" || source[at] === "E") {
        at += 1;
        if (source[at] === "+" || source[at] === "-") at += 1;
        digits();
      }
      const text = source.slice(start, at);
      const value = Number(text);
      if (text === "" || !Number.isFinite(value)) {
        throw new Error(`expected a number at character ${start + 1}`);
      }
      return value;
    };
    const flag = () => {
      separator();
      const character = source[at];
      if (character !== "0" && character !== "1") {
        throw new Error(`expected an arc flag at character ${at + 1}`);
      }
      at += 1;
      return Number(character);
    };
    separator();
    while (at < source.length) {
      const character = source[at];
      if ((/[a-zA-Z]/).test(character)) {
        if (arity[character.toUpperCase()] === undefined) {
          throw new Error(`unknown command "${character}"`);
        }
        code = character;
        at += 1;
      } else if (code === "") {
        throw new Error("path data must open with a command");
      } else if (code === "M" || code === "m") {
        code = code === "M" ? "L" : "l";
      } else if (code === "Z" || code === "z") {
        throw new Error(`expected a command at character ${at + 1}`);
      }
      const letter = code.toUpperCase();
      const args = [];
      if (letter === "A") {
        args.push(number(), number(), number(), flag(), flag(), number(), number());
      } else {
        for (let taken = 0; taken < arity[letter]; taken += 1) args.push(number());
      }
      commands.push({
        code,
        args
      });
      separator();
    }
    if (commands.length === 0) throw new Error("path data is empty");
    return commands;
  };
  const normalisePathData = commands => {
    const out = [];
    let x = 0;
    let y = 0;
    let startX = 0;
    let startY = 0;
    let cubicControl = null;
    let quadraticControl = null;
    for (const {code, args} of commands) {
      const letter = code.toUpperCase();
      const relative = code !== letter;
      const dx = relative ? x : 0;
      const dy = relative ? y : 0;
      const pairs = values => {
        const mapped = [];
        for (let index = 0; index + 1 < values.length; index += 2) {
          mapped.push(values[index] + dx, values[index + 1] + dy);
        }
        return mapped;
      };
      let nextCubic = null;
      let nextQuadratic = null;
      if (letter === "M") {
        const [px, py] = pairs(args);
        out.push({
          code: "M",
          args: [px, py]
        });
        x = px;
        y = py;
        startX = px;
        startY = py;
      } else if (letter === "L") {
        const [px, py] = pairs(args);
        out.push({
          code: "L",
          args: [px, py]
        });
        x = px;
        y = py;
      } else if (letter === "H") {
        x = args[0] + dx;
        out.push({
          code: "L",
          args: [x, y]
        });
      } else if (letter === "V") {
        y = args[0] + dy;
        out.push({
          code: "L",
          args: [x, y]
        });
      } else if (letter === "C") {
        const points = pairs(args);
        out.push({
          code: "C",
          args: points
        });
        nextCubic = [points[2], points[3]];
        x = points[4];
        y = points[5];
      } else if (letter === "S") {
        const points = pairs(args);
        const first = cubicControl ? [2 * x - cubicControl[0], 2 * y - cubicControl[1]] : [x, y];
        out.push({
          code: "C",
          args: [...first, ...points]
        });
        nextCubic = [points[0], points[1]];
        x = points[2];
        y = points[3];
      } else if (letter === "Q") {
        const points = pairs(args);
        out.push({
          code: "Q",
          args: points
        });
        nextQuadratic = [points[0], points[1]];
        x = points[2];
        y = points[3];
      } else if (letter === "T") {
        const points = pairs(args);
        const control = quadraticControl ? [2 * x - quadraticControl[0], 2 * y - quadraticControl[1]] : [x, y];
        out.push({
          code: "Q",
          args: [...control, ...points]
        });
        nextQuadratic = control;
        x = points[0];
        y = points[1];
      } else if (letter === "A") {
        const endX = args[5] + dx;
        const endY = args[6] + dy;
        out.push(...arcToCubics(x, y, args[0], args[1], args[2], args[3], args[4], endX, endY));
        x = endX;
        y = endY;
      } else if (letter === "Z") {
        out.push({
          code: "Z",
          args: []
        });
        x = startX;
        y = startY;
      }
      cubicControl = nextCubic;
      quadraticControl = nextQuadratic;
    }
    return out;
  };
  const arcToCubics = (x1, y1, rx, ry, rotation, largeArc, sweep, x2, y2) => {
    if (x1 === x2 && y1 === y2) return [];
    let radiusX = Math.abs(rx);
    let radiusY = Math.abs(ry);
    if (radiusX === 0 || radiusY === 0) return [{
      code: "L",
      args: [x2, y2]
    }];
    const phi = rotation * Math.PI / 180;
    const cosPhi = Math.cos(phi);
    const sinPhi = Math.sin(phi);
    const midX = (x1 - x2) / 2;
    const midY = (y1 - y2) / 2;
    const primeX = cosPhi * midX + sinPhi * midY;
    const primeY = -sinPhi * midX + cosPhi * midY;
    const oversize = primeX * primeX / (radiusX * radiusX) + primeY * primeY / (radiusY * radiusY);
    if (oversize > 1) {
      const grow = Math.sqrt(oversize);
      radiusX *= grow;
      radiusY *= grow;
    }
    const denominator = radiusX * radiusX * primeY * primeY + radiusY * radiusY * primeX * primeX;
    const numerator = radiusX * radiusX * radiusY * radiusY - radiusX * radiusX * primeY * primeY - radiusY * radiusY * primeX * primeX;
    const factor = (largeArc === sweep ? -1 : 1) * Math.sqrt(Math.max(0, numerator) / denominator);
    const centrePrimeX = factor * radiusX * primeY / radiusY;
    const centrePrimeY = -factor * radiusY * primeX / radiusX;
    const centreX = cosPhi * centrePrimeX - sinPhi * centrePrimeY + (x1 + x2) / 2;
    const centreY = sinPhi * centrePrimeX + cosPhi * centrePrimeY + (y1 + y2) / 2;
    const angle = (ux, uy, vx, vy) => {
      const length = Math.hypot(ux, uy) * Math.hypot(vx, vy);
      const cosine = length === 0 ? 1 : Math.min(1, Math.max(-1, (ux * vx + uy * vy) / length));
      return (ux * vy - uy * vx < 0 ? -1 : 1) * Math.acos(cosine);
    };
    const fromX = (primeX - centrePrimeX) / radiusX;
    const fromY = (primeY - centrePrimeY) / radiusY;
    const toX = (-primeX - centrePrimeX) / radiusX;
    const toY = (-primeY - centrePrimeY) / radiusY;
    const start = angle(1, 0, fromX, fromY);
    let sweptAngle = angle(fromX, fromY, toX, toY);
    if (!sweep && sweptAngle > 0) sweptAngle -= 2 * Math.PI;
    if (sweep && sweptAngle < 0) sweptAngle += 2 * Math.PI;
    const steps = Math.max(1, Math.ceil(Math.abs(sweptAngle) / (Math.PI / 2)));
    const step = sweptAngle / steps;
    const handle = 4 / 3 * Math.tan(step / 4);
    const at = t => [centreX + radiusX * Math.cos(t) * cosPhi - radiusY * Math.sin(t) * sinPhi, centreY + radiusX * Math.cos(t) * sinPhi + radiusY * Math.sin(t) * cosPhi];
    const slope = t => [-radiusX * Math.sin(t) * cosPhi - radiusY * Math.cos(t) * sinPhi, -radiusX * Math.sin(t) * sinPhi + radiusY * Math.cos(t) * cosPhi];
    const out = [];
    for (let index = 0; index < steps; index += 1) {
      const from = start + index * step;
      const to = from + step;
      const [ax, ay] = at(from);
      const [bx, by] = at(to);
      const [aSlopeX, aSlopeY] = slope(from);
      const [bSlopeX, bSlopeY] = slope(to);
      out.push({
        code: "C",
        args: [ax + handle * aSlopeX, ay + handle * aSlopeY, bx - handle * bSlopeX, by - handle * bSlopeY, bx, by]
      });
    }
    const last = out[out.length - 1];
    last.args[4] = x2;
    last.args[5] = y2;
    return out;
  };
  const transformPathData = (segments, matrix) => segments.map(({code, args}) => {
    const moved = [];
    for (let index = 0; index + 1 < args.length; index += 2) {
      const x = args[index];
      const y = args[index + 1];
      moved.push(matrix.a * x + matrix.c * y + matrix.e, matrix.b * x + matrix.d * y + matrix.f);
    }
    return {
      code,
      args: moved
    };
  });
  const fitMatrix = (source, target) => {
    const chosen = Math.min(target.width / source.width, target.height / source.height);
    const scale = Number.isFinite(chosen) && chosen > 0 ? chosen : 1;
    return {
      a: scale,
      b: 0,
      c: 0,
      d: scale,
      e: target.x + target.width / 2 - (source.x + source.width / 2) * scale,
      f: target.y + target.height / 2 - (source.y + source.height / 2) * scale
    };
  };
  const printPathData = segments => segments.map(({code, args}) => {
    if (args.length === 0) return code;
    const numbers = args.map(value => {
      const rounded = Math.round(value * 100) / 100;
      return String(Object.is(rounded, -0) ? 0 : rounded);
    });
    return `${code} ${numbers.join(" ")}`;
  }).join(" ");
  const shapePathData = (tag, attrs) => {
    const number = (name, fallback = 0) => {
      const value = parseFloat(attrs[name]);
      return Number.isFinite(value) ? value : fallback;
    };
    if (tag === "path") {
      const d = typeof attrs.d === "string" ? attrs.d.trim() : "";
      return d === "" ? null : d;
    }
    if (tag === "rect") {
      const width = number("width");
      const height = number("height");
      if (!(width > 0) || !(height > 0)) return null;
      const x = number("x");
      const y = number("y");
      const declaredX = parseFloat(attrs.rx);
      const declaredY = parseFloat(attrs.ry);
      const rawX = Number.isFinite(declaredX) ? declaredX : declaredY;
      const rawY = Number.isFinite(declaredY) ? declaredY : declaredX;
      const rx = Math.min(Math.max(Number.isFinite(rawX) ? rawX : 0, 0), width / 2);
      const ry = Math.min(Math.max(Number.isFinite(rawY) ? rawY : 0, 0), height / 2);
      if (rx === 0 || ry === 0) {
        return `M ${x} ${y} H ${x + width} V ${y + height} H ${x} Z`;
      }
      return [`M ${x + rx} ${y}`, `H ${x + width - rx}`, `A ${rx} ${ry} 0 0 1 ${x + width} ${y + ry}`, `V ${y + height - ry}`, `A ${rx} ${ry} 0 0 1 ${x + width - rx} ${y + height}`, `H ${x + rx}`, `A ${rx} ${ry} 0 0 1 ${x} ${y + height - ry}`, `V ${y + ry}`, `A ${rx} ${ry} 0 0 1 ${x + rx} ${y}`, "Z"].join(" ");
    }
    if (tag === "circle" || tag === "ellipse") {
      const rx = tag === "circle" ? number("r") : number("rx");
      const ry = tag === "circle" ? number("r") : number("ry");
      if (!(rx > 0) || !(ry > 0)) return null;
      const cx = number("cx");
      const cy = number("cy");
      return [`M ${cx - rx} ${cy}`, `A ${rx} ${ry} 0 1 0 ${cx + rx} ${cy}`, `A ${rx} ${ry} 0 1 0 ${cx - rx} ${cy}`, "Z"].join(" ");
    }
    if (tag === "line") {
      const x1 = number("x1");
      const y1 = number("y1");
      const x2 = number("x2");
      const y2 = number("y2");
      if (x1 === x2 && y1 === y2) return null;
      return `M ${x1} ${y1} L ${x2} ${y2}`;
    }
    if (tag === "polyline" || tag === "polygon") {
      const values = String(attrs.points ?? "").trim().split(/[\s,]+/).map(Number).filter(value => Number.isFinite(value));
      if (values.length < 4) return null;
      const steps = [`M ${values[0]} ${values[1]}`];
      for (let index = 2; index + 1 < values.length; index += 2) {
        steps.push(`L ${values[index]} ${values[index + 1]}`);
      }
      if (tag === "polygon") steps.push("Z");
      return steps.join(" ");
    }
    return null;
  };
  const svgToPathData = (svgText, targetPathData, doc = document) => {
    const NS = "http://www.w3.org/2000/svg";
    const parsed = new DOMParser().parseFromString(String(svgText), "image/svg+xml");
    if (parsed.getElementsByTagName("parsererror").length > 0 || !parsed.documentElement || parsed.documentElement.localName !== "svg") {
      throw new Error("That file is not an SVG, or its markup is malformed.");
    }
    const host = doc.createElement("div");
    host.setAttribute("aria-hidden", "true");
    host.style.cssText = "position:fixed;left:-99999px;top:0;width:600px;height:600px;overflow:hidden;";
    const svg = doc.importNode(parsed.documentElement, true);
    host.appendChild(svg);
    doc.body.appendChild(host);
    try {
      const reference = doc.createElementNS(NS, "g");
      svg.appendChild(reference);
      const rootMatrix = reference.getScreenCTM();
      const defining = ["defs", "clipPath", "mask", "symbol", "marker", "pattern"];
      const isDefinition = element => {
        for (let node = element.parentNode; node && node !== svg; node = node.parentNode) {
          if (defining.includes(node.localName)) return true;
        }
        return false;
      };
      const shapes = [...svg.querySelectorAll("path,rect,circle,ellipse,line,polyline,polygon")];
      const segments = [];
      let shapesUsed = 0;
      let firstProblem = null;
      for (const element of shapes) {
        if (isDefinition(element)) continue;
        if (doc.defaultView.getComputedStyle(element).display === "none") continue;
        const attrs = {};
        for (const attribute of element.attributes) attrs[attribute.localName] = attribute.value;
        const d = shapePathData(element.localName, attrs);
        if (d === null) continue;
        let own;
        try {
          own = normalisePathData(parsePathData(d));
        } catch (error) {
          firstProblem = firstProblem ?? error.message;
          continue;
        }
        const matrix = element.getScreenCTM();
        segments.push(...rootMatrix && matrix ? transformPathData(own, rootMatrix.inverse().multiply(matrix)) : own);
        shapesUsed += 1;
      }
      if (segments.length === 0) {
        if (firstProblem) throw new Error(`This SVG has unreadable path data: ${firstProblem}.`);
        const untraceable = ["text", "image", "use"].find(tag => svg.getElementsByTagName(tag).length > 0);
        throw new Error(untraceable ? `This SVG draws with <${untraceable}>, which has no outline to trace. Convert it to paths and try again.` : "This SVG has no shapes to import.");
      }
      const probe = doc.createElementNS(NS, "path");
      svg.appendChild(probe);
      probe.setAttribute("d", printPathData(segments));
      const source = probe.getBBox();
      if (!(source.width > 0) || !(source.height > 0)) {
        if (!(source.width > 0) && !(source.height > 0)) {
          throw new Error("This SVG's shapes have no size.");
        }
      }
      probe.setAttribute("d", String(targetPathData));
      const target = probe.getBBox();
      return {
        d: printPathData(transformPathData(segments, fitMatrix(source, target))),
        shapes: shapesUsed
      };
    } finally {
      host.remove();
    }
  };
  const granularity = value => {
    const decimals = String(value).split(".")[1];
    return decimals ? Number(`1e-${decimals.length}`) : 1;
  };
  const readout = (variable, value) => {
    if (variable.type === "number") return "";
    if (variable.type === "color") return String(value);
    if (variable.type === "enum") {
      const hit = (variable.options ?? []).find(o => o.value === value);
      return hit ? hit.label ?? hit.value : String(value);
    }
    return "";
  };
  const control = (variable, value, onChange, note, onNote, onTyping) => {
    const options = variable.options ?? [];
    if (variable.type === "enum" && options.length > 0 && options.length <= 4) {
      return <div className="hf-ve-seg">
          {options.map(o => <button key={o.value} type="button" data-on={value === o.value} aria-pressed={value === o.value} onClick={() => onChange(o.value)} className="hf-ve-seg-btn hf-ve-tint">
              {o.label ?? o.value}
            </button>)}
        </div>;
    }
    if (variable.type === "enum") {
      return <select className="hf-ve-field hf-ve-select hf-ve-tint" value={value} aria-label={variable.label ?? variable.id} onChange={e => onChange(e.target.value)}>
          {options.map(o => <option key={o.value} value={o.value}>
              {o.label ?? o.value}
            </option>)}
        </select>;
    }
    if (variable.type === "number") {
      const min = Number(variable.min);
      const max = Number(variable.max);
      const unit = variable.unit ?? "";
      const declaredStep = Number(variable.step);
      const step = declaredStep > 0 ? declaredStep : 1;
      const label = variable.label ?? variable.id;
      if (!(Number.isFinite(min) && Number.isFinite(max) && max > min)) {
        return <input type="number" className="hf-ve-field hf-ve-mono hf-ve-tint" value={value} min={Number.isFinite(min) ? min : undefined} max={Number.isFinite(max) ? max : undefined} step={declaredStep > 0 ? declaredStep : granularity(variable.default)} aria-label={label} onChange={e => {
          const next = Number(e.target.value);
          if (e.target.value !== "" && Number.isFinite(next)) onChange(next);
        }} />;
      }
      const at = n => Math.min(1, Math.max(0, (Number(n) - min) / (max - min)));
      const now = at(value);
      const authored = at(variable.default);
      const place = fraction => ({
        offset: `${fraction * 100}%`,
        nudge: `${(0.5 - fraction) * 16}px`
      });
      const value_ = place(now);
      const default_ = place(authored);
      const grain = event => {
        event.currentTarget.step = event.shiftKey ? step / 10 : step;
      };
      return <div className="hf-ve-slider" style={{
        "--ve-fill": value_.offset,
        "--ve-fill-nudge": value_.nudge,
        "--ve-default": default_.offset,
        "--ve-default-nudge": default_.nudge
      }}>
          {}
          <div className="hf-ve-ruler" data-near={now < 0.14 ? "min" : now > 0.86 ? "max" : ""} aria-hidden="true">
            <span className="hf-ve-bound" data-end="min">
              {min}
            </span>
            <span className="hf-ve-bound" data-end="max">
              {max}
            </span>
            <span className="hf-ve-readout">
              {value}
              {unit}
            </span>
          </div>
          <span className="hf-ve-track">
            <input type="range" className="hf-ve-range" min={min} max={max} step={step} value={value} aria-label={label} aria-valuetext={`${value}${unit}`} onChange={e => onChange(Number(e.target.value))} onPointerDown={grain} onKeyDown={grain} onDoubleClick={() => onChange(variable.default)} />
            {}
            {Math.abs(now - authored) > 0.04 && <span className="hf-ve-default" aria-hidden="true" />}
          </span>
        </div>;
    }
    if (variable.type === "boolean") {
      const on = value === true || value === "true";
      return <button type="button" role="switch" aria-checked={on} aria-label={variable.label ?? variable.id} data-on={on} onClick={() => onChange(!on)} className="hf-ve-switch">
          <span className="hf-ve-switch-dot" />
        </button>;
    }
    if (variable.type === "color") {
      return <div className="flex items-center gap-2">
          <input type="color" className="hf-ve-swatch hf-ve-tint" value={value} aria-label={variable.label ?? variable.id} onChange={e => onChange(e.target.value)} />
          <input type="text" className="hf-ve-field hf-ve-mono hf-ve-tint" value={value} onChange={e => onChange(e.target.value)} onFocus={() => onTyping(variable.id)} onBlur={() => onTyping(null)} onKeyDown={e => {
        if (e.key === "Enter") e.currentTarget.blur();
      }} />
        </div>;
    }
    if (isSvgPathData(variable.default)) {
      const fileId = `hf-ve-file-${variable.id}`;
      const noteId = `hf-ve-note-${variable.id}`;
      const receive = file => {
        if (!file) return;
        file.text().then(text => {
          const {d, shapes} = svgToPathData(text, variable.default);
          onChange(d);
          onNote({
            tone: "ok",
            message: `${file.name}: ${shapes} shape${shapes === 1 ? "" : "s"} scaled to fit.`
          });
        }).catch(error => onNote({
          tone: "error",
          message: error.message
        }));
      };
      return <div className="hf-ve-drop" onDragOver={event => {
        event.preventDefault();
        event.currentTarget.dataset.over = "true";
      }} onDragLeave={event => {
        event.currentTarget.dataset.over = "false";
      }} onDrop={event => {
        event.preventDefault();
        event.currentTarget.dataset.over = "false";
        receive(event.dataTransfer.files[0]);
      }}>
          {}
          <div className="hf-ve-dropzone">
            <button type="button" className="hf-ve-btn hf-ve-tint" onClick={() => document.getElementById(fileId).click()}>
              Import SVG
            </button>
            <input id={fileId} type="file" accept=".svg,image/svg+xml" className="hf-ve-file" tabIndex={-1} aria-hidden="true" onChange={event => {
        receive(event.target.files[0]);
        event.target.value = "";
      }} />
            {}
            <p id={noteId} role="status" className="hf-ve-note" data-tone={note ? note.tone : ""}>
              {note ? note.message : "Or drop one here. Scaled to fit and centred."}
            </p>
          </div>
          <details className="hf-ve-advanced">
            <summary>Path data</summary>
            <input type="text" className="hf-ve-field hf-ve-mono hf-ve-tint" value={value} aria-label={variable.label ?? variable.id} onChange={e => onChange(e.target.value)} onFocus={() => onTyping(variable.id)} onBlur={() => onTyping(null)} onKeyDown={e => {
        if (e.key === "Enter") e.currentTarget.blur();
      }} />
          </details>
        </div>;
    }
    return <input type="text" className="hf-ve-field hf-ve-tint" value={value} aria-label={variable.label ?? variable.id} onChange={e => onChange(e.target.value)} onFocus={() => onTyping(variable.id)} onBlur={() => onTyping(null)} onKeyDown={e => {
      if (e.key === "Enter") e.currentTarget.blur();
    }} />;
  };
  const variablesKey = JSON.stringify(variables);
  const defaults = useMemo(() => {
    const built = {};
    for (const v of variables) if (v.default !== undefined) built[v.id] = v.default;
    return built;
  }, [variablesKey]);
  const urlKey = `vars-${compositionId}`;
  const readFromUrl = () => {
    if (typeof window === "undefined") return {};
    try {
      const raw = new URLSearchParams(window.location.search).get(urlKey);
      if (!raw) return {};
      const parsed = JSON.parse(raw);
      if (!parsed || typeof parsed !== "object" || Array.isArray(parsed)) return {};
      const declared = new Set(variables.map(v => v.id));
      return Object.fromEntries(Object.entries(parsed).filter(([id]) => declared.has(id)));
    } catch {
      return {};
    }
  };
  const [values, setValues] = useState(() => ({
    ...defaults,
    ...readFromUrl()
  }));
  useEffect(() => {
    const fromUrl = readFromUrl();
    if (Object.keys(fromUrl).length > 0) setValues(current => ({
      ...current,
      ...fromUrl
    }));
  }, []);
  useEffect(() => {
    if (typeof window === "undefined") return;
    const changed = Object.fromEntries(Object.entries(values).filter(([id, value]) => JSON.stringify(value) !== JSON.stringify(defaults[id])));
    const url = new URL(window.location.href);
    if (Object.keys(changed).length === 0) url.searchParams.delete(urlKey); else url.searchParams.set(urlKey, JSON.stringify(changed));
    const next = url.toString();
    if (next !== window.location.href) {
      window.history.replaceState(null, "", next);
      window.dispatchEvent(new CustomEvent("hf-vars-changed"));
    }
  }, [values, defaults, urlKey]);
  const [notes, setNotes] = useState({});
  const [typing, setTyping] = useState(null);
  const posted = useRef(null);
  const frame = useRef(null);
  const bootstrap = ["<!doctype html><html><head><meta charset='utf-8'>", "<style>html,body{margin:0;height:100%;overflow:hidden;background:transparent}", "hyperframes-player{display:block;width:100%;height:100%}</style>", '<script src="https://cdn.jsdelivr.net/npm/@hyperframes/player@latest/dist/hyperframes-player.global.js"></' + "script>", "</head><body><script>", "(function(){", `  var PAYLOAD = ${JSON.stringify(previewSrc)};`, `  var INITIAL = ${JSON.stringify({
    ...defaults,
    ...readFromUrl()
  })};`, "  var html = null, player = null, poll = null;", "  function withValues(source, values) {", "    var json = JSON.stringify(values);", "    var attr = json.replace(/'/g, '&#39;');", "    var out = source.replace(/\\sdata-variable-values=(?:\"[^\"]*\"|'[^']*')/gi, '');", "    out = out.replace(/(data-composition-src=)/gi, \"data-variable-values='\" + attr + \"' $1\");", "    var tag = '<' + 'script>window.__hfVariables=' + json + ';<' + '/script>';", "    return /<head[^>]*>/i.test(out)", "      ? out.replace(/<head([^>]*)>/i, '<head$1>' + tag)", "      : tag + out;", "  }", "  function arm(resumeAt) {", "    clearInterval(poll);", "    var last = -1, tries = 0, seeked = false;", "    poll = setInterval(function () {", "      if (player.ready) {", "        if (!seeked) { seeked = true; if (resumeAt > 0) player.seek(resumeAt); }", "        player.play();", "      }", "      if (seeked && player.currentTime > 0 && player.currentTime !== last) {", "        clearInterval(poll); return;", "      }", "      last = player.currentTime;", "      if (++tries > 150) clearInterval(poll);", "    }, 100);", "  }", "  function mount(values, resumeAt) {", "    if (html === null) return;", "    player.setAttribute('srcdoc', withValues(html, values));", "    arm(resumeAt || 0);", "  }", "  player = document.createElement('hyperframes-player');", "  player.setAttribute('controls', ''); player.setAttribute('muted', '');", "  document.body.appendChild(player);", "  player.addEventListener('ended', function () { player.seek(0); player.play(); });", "  fetch(PAYLOAD).then(function (r) { return r.json(); }).then(function (d) {", "    html = d.html; mount(INITIAL, 0);", "  }).catch(function (e) {", "    document.body.innerHTML = '<pre style=\"color:#f66;font:12px monospace;padding:12px\">preview unavailable: ' + e + '</pre>';", "  });", "  addEventListener('message', function (event) {", "    var values = event.data && event.data.hfVariables;", "    if (!values) return;", "    mount(values, player.currentTime || 0);", "  });", "})();", "</" + "script></body></html>"].join("");
  useEffect(() => {
    if (typing !== null) return;
    const payload = JSON.stringify(values);
    if (payload === posted.current) return;
    const timer = setTimeout(() => {
      const target = frame.current && frame.current.contentWindow;
      if (!target) return;
      posted.current = payload;
      target.postMessage({
        hfVariables: values
      }, window.location.origin);
    }, 150);
    return () => clearTimeout(timer);
  }, [values, typing]);
  const printed = JSON.stringify(values, null, 2).split("\n").join("\n  ");
  const attributes = [["data-composition-id", `"${compositionId}"`], ["data-composition-src", `"${compositionSrc}"`], ["data-variable-values", `'${printed}'`]];
  const snippetLines = [[[SHIKI.punct, "<"], [SHIKI.tag, "div"]]];
  for (const [name, literal] of attributes) {
    const [head, ...rest] = literal.split("\n");
    snippetLines.push([[SHIKI.attr, `  ${name}`], [SHIKI.equals, "="], [SHIKI.value, head]]);
    for (const line of rest) snippetLines.push([[SHIKI.value, line]]);
  }
  snippetLines.push([[SHIKI.punct, "></"], [SHIKI.tag, "div"], [SHIKI.punct, ">"]]);
  const dirty = variables.some(v => values[v.id] !== defaults[v.id]);
  const hasTune = variables.length > 0;
  const [tab, setTab] = useState("preview");
  const lines = meta.codeLines;
  const TABS = [["preview", "Preview"], ...hasCode ? [["code", "Code", lines ? `${lines} ln` : ""]] : [], ["install", "Snippet"], ["docs", "Docs"]];
  const changedValues = () => {
    const changed = {};
    for (const v of variables) {
      if (JSON.stringify(values[v.id]) !== JSON.stringify(defaults[v.id])) changed[v.id] = values[v.id];
    }
    return changed;
  };
  const renderCommand = (() => {
    const changed = changedValues();
    const vars = Object.keys(changed).length ? ` --variables '${JSON.stringify(changed).replace(/'/g, "'\\''")}'` : "";
    return `# Run from the installed project's root.\nnpx hyperframes render --composition '${compositionSrc}'${vars}`;
  })();
  const agentRequest = (() => {
    const changed = changedValues();
    const base = `Install the HyperFrames catalog item "${compositionId}" (${title || compositionId}) into my project with \`npx hyperframes add ${compositionId}\`, mount it at the point of my composition where it should play, and verify with \`npx hyperframes check\`.`;
    const set = Object.entries(changed).map(([id, value]) => `${id} = ${JSON.stringify(value)}`);
    return set.length ? `${base} Set ${set.join(", ")}; keep the other variables at their defaults.` : `${base} Keep the default variables unless I say otherwise.`;
  })();
  const [copiedKey, setCopiedKey] = useState("");
  const copy = async (key, text) => {
    let ok = false;
    try {
      await navigator.clipboard.writeText(text);
      ok = true;
    } catch {
      const area = document.createElement("textarea");
      area.value = text;
      area.setAttribute("readonly", "");
      area.style.cssText = "position:fixed;opacity:0";
      document.body.appendChild(area);
      area.select();
      ok = document.execCommand("copy");
      area.remove();
    }
    if (!ok) return;
    setCopiedKey(key);
    setTimeout(() => setCopiedKey(current => current === key ? "" : current), 1400);
  };
  const CopyAction = ({id, label, text, primary}) => {
    const shown = copiedKey === id ? "Copied" : label;
    return <button type="button" className="hf-ve-action" data-primary={primary ? "true" : "false"} onClick={() => copy(id, typeof text === "function" ? text() : text)}>
        {[label, "Copied"].map(name => <span key={name} className="hf-ve-action-label" data-shown={String(name === shown)}>
            {name}
          </span>)}
      </button>;
  };
  const wiring = snippetLines.map(tokens => tokens.map(([, text]) => text).join("")).join("\n");
  const mountText = `${wiring}\n`;
  const flagNotice = needsFlag ? <div className="flex aspect-video w-full items-center justify-center text-sm text-zinc-500">
      Needs <code>chrome://flags/#{needsFlag}</code> to render live
    </div> : null;
  const player = <iframe ref={frame} srcDoc={bootstrap} className="hf-ve-preview block aspect-video w-full" title={`${compositionId} preview`} />;
  const recordedRef = useRef(null);
  const [reduced, setReduced] = useState(() => typeof window !== "undefined" && window.matchMedia("(prefers-reduced-motion: reduce)").matches);
  useEffect(() => {
    const query = window.matchMedia("(prefers-reduced-motion: reduce)");
    const onChange = event => setReduced(event.matches);
    query.addEventListener("change", onChange);
    return () => query.removeEventListener("change", onChange);
  }, []);
  useEffect(() => {
    const clip = recordedRef.current;
    if (!reduced || !clip) return;
    clip.pause();
    clip.removeAttribute("src");
    clip.load();
  }, [reduced]);
  const recorded = video ? <video ref={recordedRef} className="block aspect-video w-full object-cover" src={reduced ? undefined : video} poster={poster} autoPlay={!reduced} muted loop={!reduced} playsInline /> : null;
  const [hasAdapter, setHasAdapter] = useState(null);
  const hasWebgpuAdapter = (gpu, timeoutMs) => {
    const probe = new Promise(resolve => resolve(gpu?.requestAdapter())).then(adapter => Boolean(adapter), () => false);
    const timeout = new Promise(resolve => setTimeout(resolve, timeoutMs, false));
    return Promise.race([probe, timeout]);
  };
  useEffect(() => {
    if (webgpu) hasWebgpuAdapter(navigator.gpu, 3000).then(setHasAdapter);
  }, [webgpu]);
  const adapterMissing = webgpu && hasAdapter === false;
  const tunePanel = hasTune && !(webgpu && hasAdapter !== true);
  let webgpuStage = player;
  if (webgpu && hasAdapter === null) webgpuStage = <div className="aspect-video w-full" />;
  if (adapterMissing) webgpuStage = recorded;
  const stageNode = webgpu ? webgpuStage : (recorded ?? flagNotice) ?? player;
  let caption = "Live composition · HyperFrames Player";
  if (adapterMissing) caption = "Recorded preview · live playback needs WebGPU, which this browser does not offer"; else if (!webgpu && (video || needsFlag)) caption = "Recorded preview";
  const slotOf = node => {
    for (let cur = node; React.isValidElement(cur); cur = React.Children.toArray(cur.props.children)[0]) {
      if (cur.props.slot) return cur.props.slot;
    }
    return null;
  };
  const allSlots = React.Children.toArray(children);
  const installSlot = allSlots.find(child => slotOf(child) === "install") ?? null;
  const otherSlots = allSlots.filter(child => child !== installSlot);
  const seconds = meta.duration ? `${meta.duration} s` : null;
  const size = meta.width && meta.height ? `${meta.width}×${meta.height}` : null;
  return <div className="hf-ve my-4">
      <style dangerouslySetInnerHTML={{
    __html: CSS
  }} />

      <div className="not-prose">
        <header className="hf-ve-head-title">
          <h1>{title}</h1>
          {description && <p>{description}</p>}
        </header>
      </div>

      {installSlot && <div className="hf-ve-install">
          <h2 className="hf-ve-install-title">Install</h2>
          {installSlot}
        </div>}

      <div className="not-prose">

        <div className="hf-ve-bar">
          <div className="hf-ve-meta">
            {seconds && <span>
                <b>{seconds}</b> duration
              </span>}
            {size && <b>{size}</b>}
            {hasTune && <span>
                <b>{variables.length}</b> {variables.length === 1 ? "variable" : "variables"}
              </span>}
            {meta.category && <b>{meta.category}</b>}
            {meta.badge && <span className="hf-ve-badge">{meta.badge}</span>}
          </div>
          <div className="hf-ve-actions">
            <CopyAction id="agent" label="Copy agent request" text={agentRequest} primary />
            <CopyAction id="wiring" label="Copy wiring" text={mountText} />
            <CopyAction id="link" label="Copy link" text={() => window.location.href} />
            {rawUrl && <a className="hf-ve-action" href={rawUrl} target="_blank" rel="noopener noreferrer">
                Raw
              </a>}
          </div>
        </div>

        <div className="hf-ve-main" data-tune={tunePanel ? "true" : "false"}>
          <div className="hf-ve-stage">
            {stageNode}
            <div className="hf-ve-caption">
              {(seconds || size) && <span>{[seconds, size && `${size} preview`].filter(Boolean).join(" · ")}</span>}
              <span>{caption}</span>
            </div>
          </div>

          {tunePanel && <aside className="hf-ve-tune" aria-label="Tune">
              <div className="hf-ve-tune-inner">
                <div className="hf-ve-tune-head">
                  Tune <small>{variables.length} {variables.length === 1 ? "variable" : "variables"}</small>
                </div>
                <div className="hf-ve-tune-list">
                  {variables.map(v => <div key={v.id}>
                      <div className="hf-ve-row">
                        <label className="hf-ve-label">{v.label ?? v.id}</label>
                        <span className="hf-ve-value">{readout(v, values[v.id])}</span>
                      </div>
                      {control(v, values[v.id], next => setValues(prev => ({
    ...prev,
    [v.id]: next
  })), notes[v.id], note => setNotes(prev => ({
    ...prev,
    [v.id]: note
  })), setTyping)}
                      {v.description && <p className="hf-ve-desc">{v.description}</p>}
                    </div>)}
                </div>
                <div className="hf-ve-tune-foot">
                  <button type="button" onClick={() => {
    setValues(defaults);
    setNotes({});
  }} disabled={!dirty} className="hf-ve-action">
                    Reset
                  </button>
                  <CopyAction id="json" label="Copy JSON" text={() => JSON.stringify(dirty ? changedValues() : defaults, null, 2)} />
                  <CopyAction id="render" label="Copy render cmd" text={renderCommand} />
                </div>
              </div>
            </aside>}
        </div>

        <div className="hf-ve-tabs hf-ve-tabs-row" role="tablist">
          {TABS.map(([id, label, note]) => <button key={id} type="button" role="tab" data-on={tab === id} aria-selected={tab === id} onClick={() => setTab(id)} className="hf-ve-tab hf-ve-tint">
              {label}
              {note ? <small>{note}</small> : null}
            </button>)}
        </div>
      </div>

      <div className="hf-ve-body">
        {}
        <div className="hf-ve-slots" data-tab={tab}>
          {otherSlots}
        </div>
        <div className="hf-ve-body-pane hf-ve-about not-prose" hidden={tab !== "preview"}>
          <h3>About</h3>
          {about && <p>{about}</p>}
          {attribution && <p className="hf-ve-attr">
              {attribution.author ? <>
                  Created by{" "}
                  {attribution.authorUrl ? <a href={attribution.authorUrl} target="_blank" rel="noopener noreferrer">
                      {attribution.author}
                    </a> : attribution.author}{" "}
                  ·{" "}
                </> : null}
              Registry item{" "}
              <a href={`https://github.com/heygen-com/hyperframes/tree/main/${attribution.path}`} target="_blank" rel="noopener noreferrer">
                heygen-com/hyperframes
              </a>{" "}
              · <code>{attribution.path}</code>
              {attribution.tags.length > 0 ? ` · ${attribution.tags.join(", ")}` : ""}
            </p>}
        </div>
        <div className="hf-ve-body-pane hf-ve-snippet not-prose" hidden={tab !== "install"}>
          {}
          <CodeBlock filename="index.html">
            <pre className="shiki shiki-themes github-light-default dark-plus" style={{
    backgroundColor: "rgb(255, 255, 255)",
    "--shiki-dark-bg": "#0B0C0E",
    color: "rgb(31, 35, 40)",
    "--shiki-dark": "#D4D4D4"
  }}>
              <code>
                {snippetLines.map((tokens, line) => <span key={line} className="line">
                    {tokens.map(([style, text], token) => <span key={token} style={style}>
                        {text}
                      </span>)}
                    {"\n"}
                  </span>)}
              </code>
            </pre>
          </CodeBlock>
        </div>
      </div>
    </div>;
};

<CatalogDetail previewSrc="/public/catalog/blocks/cuboid-carousel.json" compositionId="cuboid-carousel" compositionSrc="compositions/cuboid-carousel/cuboid-carousel.html" title="Cuboid Carousel" description="A chain of bevelled cuboids rides a travelling wave as a content carousel." variables={[{"id":"cardsJson","type":"string","label":"Content - Cards JSON (optional, see CARDS in source)","default":""},{"id":"heroCard","type":"number","label":"Content - Hero card (1-based)","default":4,"min":1,"max":12,"step":1},{"id":"count","type":"number","label":"Content - Repeating card count","default":8,"min":1,"max":12,"step":1},{"id":"gap","type":"number","label":"Layout - Extra gap between cuboids","default":0.01,"min":0,"max":1.5,"step":0.005},{"id":"cuboidWidth","type":"number","label":"Cuboid - Width","default":1.7,"min":0.3,"max":5,"step":0.01},{"id":"cuboidHeight","type":"number","label":"Cuboid - Height","default":2.4,"min":0.3,"max":6,"step":0.01},{"id":"cuboidDepth","type":"number","label":"Cuboid - Thickness (depth)","default":0.14,"min":0.02,"max":2,"step":0.01},{"id":"cornerRadius","type":"number","label":"Cuboid - Corner radius","default":0.105,"min":0,"max":0.6,"step":0.005},{"id":"bevelSize","type":"number","label":"Cuboid - Bevel size (edge chamfer)","default":0.03,"min":0,"max":0.3,"step":0.001},{"id":"bevelThickness","type":"number","label":"Cuboid - Bevel thickness","default":0.04,"min":0,"max":0.3,"step":0.001},{"id":"smoothness","type":"number","label":"Cuboid - Smoothness (segments)","default":32,"min":1,"max":32,"step":1},{"id":"bodyColor","type":"color","label":"Cuboid - Body colour","default":"#242424"},{"id":"roughness","type":"number","label":"Cuboid - Roughness","default":0.6,"min":0,"max":1,"step":0.01},{"id":"metalness","type":"number","label":"Cuboid - Metalness","default":0.4,"min":0,"max":1,"step":0.01},{"id":"heroScale","type":"number","label":"Hero - Isolated scale","default":1,"min":1,"max":1.6,"step":0.01},{"id":"heroFillIntensity","type":"number","label":"Hero - Face light intensity","default":0.55,"min":0,"max":2,"step":0.05,"description":"A soft fill on the detached face keeps its text readable without changing the original chain lighting."},{"id":"heroExitX","type":"number","label":"Hero - Exit X rotation degrees","default":288,"min":-720,"max":720,"step":1},{"id":"heroExitY","type":"number","label":"Hero - Exit Y rotation degrees","default":-234,"min":-720,"max":720,"step":1},{"id":"heroExitZ","type":"number","label":"Hero - Exit Z rotation degrees","default":198,"min":-720,"max":720,"step":1},{"id":"ambientIntensity","type":"number","label":"Lights - Ambient intensity","default":0.35,"min":0,"max":4,"step":0.01},{"id":"ambientColor","type":"color","label":"Lights - Ambient colour","default":"#ffffff"},{"id":"topIntensity","type":"number","label":"Lights - Top rig intensity","default":3.1,"min":0,"max":12,"step":0.05},{"id":"topColor","type":"color","label":"Lights - Top rig colour","default":"#ffffff"},{"id":"bottomIntensity","type":"number","label":"Lights - Bottom rig intensity","default":2.15,"min":0,"max":12,"step":0.05},{"id":"bottomColor","type":"color","label":"Lights - Bottom rig colour","default":"#ffcaad"},{"id":"keyIntensity","type":"number","label":"Lights - Key rig intensity","default":5,"min":0,"max":12,"step":0.05},{"id":"keyColor","type":"color","label":"Lights - Key rig colour","default":"#ffe9d6"},{"id":"shadowRadius","type":"number","label":"Shadows - Softness at map size 2048","default":44.5,"min":0,"max":50,"step":0.5},{"id":"shadowMapSize","type":"number","label":"Shadows - Map size","default":2048,"min":512,"max":4096,"step":256},{"id":"backdrop","type":"color","label":"Background - Colour","default":"#0b0d13"},{"id":"cameraFov","type":"number","label":"Camera - Initial Field of view","default":11,"min":10,"max":90,"step":0.5},{"id":"cameraX","type":"number","label":"Camera - Initial X","default":-1.65,"min":-20,"max":20,"step":0.05},{"id":"cameraY","type":"number","label":"Camera - Initial Y","default":8.5,"min":-20,"max":20,"step":0.05},{"id":"cameraZ","type":"number","label":"Camera - Initial Z (distance)","default":-8.508708,"min":-20,"max":50,"step":0.1},{"id":"cameraSettleFrame","type":"number","label":"Camera - Settle frame (30 fps)","default":70,"min":20,"max":90,"step":1,"description":"Fast-start ease-out along the saved route. Approved value: 70."},{"id":"handheldStrength","type":"number","label":"Camera - Handheld hold strength","default":1,"min":0,"max":1,"step":0.05,"description":"Camera-only motion during frames 90–150; 0 disables it, 1 matches Blender."},{"id":"cameraTargetFov","type":"number","label":"Camera target - Field of view","default":34,"min":10,"max":90,"step":0.5},{"id":"cameraTargetX","type":"number","label":"Camera target - X","default":-7.25,"min":-20,"max":20,"step":0.05},{"id":"cameraTargetY","type":"number","label":"Camera target - Y","default":1.15,"min":-20,"max":20,"step":0.05},{"id":"cameraTargetZ","type":"number","label":"Camera target - Z","default":6.2,"min":2,"max":50,"step":0.1}]} meta={{"duration":6.67,"width":1920,"height":1080,"category":"3D motion","badge":"Stable","codeLines":873}} attribution={{"path":"registry/blocks/cuboid-carousel","tags":["3d-motion","carousel","cards","travelling-wave","pbr","shadows","room-environment"]}} hasCode rawUrl="https://raw.githubusercontent.com/heygen-com/hyperframes/main/registry/blocks/cuboid-carousel/cuboid-carousel.html">
  <CatalogSlot slot="code">
    ```html cuboid-carousel.html theme={null}
    <!doctype html>
    <html
      lang="en"
      data-composition-variables='[{"id":"cardsJson","type":"string","label":"Content - Cards JSON (optional, see CARDS in source)","default":""},{"id":"heroCard","type":"number","label":"Content - Hero card (1-based)","default":4,"min":1,"max":12,"step":1},{"id":"count","type":"number","label":"Content - Repeating card count","default":8,"min":1,"max":12,"step":1},{"id":"gap","type":"number","label":"Layout - Extra gap between cuboids","default":0.01,"min":0,"max":1.5,"step":0.005},{"id":"cuboidWidth","type":"number","label":"Cuboid - Width","default":1.7,"min":0.3,"max":5,"step":0.01},{"id":"cuboidHeight","type":"number","label":"Cuboid - Height","default":2.4,"min":0.3,"max":6,"step":0.01},{"id":"cuboidDepth","type":"number","label":"Cuboid - Thickness (depth)","default":0.14,"min":0.02,"max":2,"step":0.01},{"id":"cornerRadius","type":"number","label":"Cuboid - Corner radius","default":0.105,"min":0,"max":0.6,"step":0.005},{"id":"bevelSize","type":"number","label":"Cuboid - Bevel size (edge chamfer)","default":0.03,"min":0,"max":0.3,"step":0.001},{"id":"bevelThickness","type":"number","label":"Cuboid - Bevel thickness","default":0.04,"min":0,"max":0.3,"step":0.001},{"id":"smoothness","type":"number","label":"Cuboid - Smoothness (segments)","default":32,"min":1,"max":32,"step":1},{"id":"bodyColor","type":"color","label":"Cuboid - Body colour","default":"#242424"},{"id":"roughness","type":"number","label":"Cuboid - Roughness","default":0.6,"min":0,"max":1,"step":0.01},{"id":"metalness","type":"number","label":"Cuboid - Metalness","default":0.4,"min":0,"max":1,"step":0.01},{"id":"heroScale","type":"number","label":"Hero - Isolated scale","default":1,"min":1,"max":1.6,"step":0.01},{"id":"heroFillIntensity","type":"number","label":"Hero - Face light intensity","default":0.55,"min":0,"max":2,"step":0.05,"description":"A soft fill on the detached face keeps its text readable without changing the original chain lighting."},{"id":"heroExitX","type":"number","label":"Hero - Exit X rotation degrees","default":288,"min":-720,"max":720,"step":1},{"id":"heroExitY","type":"number","label":"Hero - Exit Y rotation degrees","default":-234,"min":-720,"max":720,"step":1},{"id":"heroExitZ","type":"number","label":"Hero - Exit Z rotation degrees","default":198,"min":-720,"max":720,"step":1},{"id":"ambientIntensity","type":"number","label":"Lights - Ambient intensity","default":0.35,"min":0,"max":4,"step":0.01},{"id":"ambientColor","type":"color","label":"Lights - Ambient colour","default":"#ffffff"},{"id":"topIntensity","type":"number","label":"Lights - Top rig intensity","default":3.1,"min":0,"max":12,"step":0.05},{"id":"topColor","type":"color","label":"Lights - Top rig colour","default":"#ffffff"},{"id":"bottomIntensity","type":"number","label":"Lights - Bottom rig intensity","default":2.15,"min":0,"max":12,"step":0.05},{"id":"bottomColor","type":"color","label":"Lights - Bottom rig colour","default":"#ffcaad"},{"id":"keyIntensity","type":"number","label":"Lights - Key rig intensity","default":5,"min":0,"max":12,"step":0.05},{"id":"keyColor","type":"color","label":"Lights - Key rig colour","default":"#ffe9d6"},{"id":"shadowRadius","type":"number","label":"Shadows - Softness at map size 2048","default":44.5,"min":0,"max":50,"step":0.5},{"id":"shadowMapSize","type":"number","label":"Shadows - Map size","default":2048,"min":512,"max":4096,"step":256},{"id":"backdrop","type":"color","label":"Background - Colour","default":"#0b0d13"},{"id":"cameraFov","type":"number","label":"Camera - Initial Field of view","default":11,"min":10,"max":90,"step":0.5},{"id":"cameraX","type":"number","label":"Camera - Initial X","default":-1.65,"min":-20,"max":20,"step":0.05},{"id":"cameraY","type":"number","label":"Camera - Initial Y","default":8.5,"min":-20,"max":20,"step":0.05},{"id":"cameraZ","type":"number","label":"Camera - Initial Z (distance)","default":-8.508708,"min":-20,"max":50,"step":0.1},{"id":"cameraSettleFrame","type":"number","label":"Camera - Settle frame (30 fps)","default":70,"min":20,"max":90,"step":1,"description":"Fast-start ease-out along the saved route. Approved value: 70."},{"id":"handheldStrength","type":"number","label":"Camera - Handheld hold strength","default":1,"min":0,"max":1,"step":0.05,"description":"Camera-only motion during frames 90–150; 0 disables it, 1 matches Blender."},{"id":"cameraTargetFov","type":"number","label":"Camera target - Field of view","default":34,"min":10,"max":90,"step":0.5},{"id":"cameraTargetX","type":"number","label":"Camera target - X","default":-7.25,"min":-20,"max":20,"step":0.05},{"id":"cameraTargetY","type":"number","label":"Camera target - Y","default":1.15,"min":-20,"max":20,"step":0.05},{"id":"cameraTargetZ","type":"number","label":"Camera target - Z","default":6.2,"min":2,"max":50,"step":0.1}]'
    >
      <head>
        <meta charset="UTF-8" />
        <meta name="viewport" content="width=1920, height=1080" />
        <title>cuboid-carousel</title>
        <script src="assets/gsap-3.14.2.min.js"></script>
        <script type="importmap">
          {
            "imports": {
              "three": "./assets/three.module.min.js",
              "three/addons/": "./assets/addons/"
            }
          }
        </script>
        <link rel="preconnect" href="https://fonts.googleapis.com" />
        <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin="" />
        <link
          href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500&display=swap"
          rel="stylesheet"
        />
        <style>
          * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
          }
          #cc-root {
            position: relative;
            width: 1920px;
            height: 1080px;
            background: #0b0d13;
            overflow: hidden;
          }
          #cc-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            background: #0b0d13;
          }
          #cc-stage {
            position: relative;
            z-index: 1;
          }
          #cc-canvas {
            display: block;
            width: 1920px;
            height: 1080px;
          }
          #cc-fontload {
            position: absolute;
            opacity: 0;
            pointer-events: none;
            font-family: "Inter", sans-serif;
          }
        </style>
      </head>
      <body>
        <div
          data-hf-id="hf-im3h"
          id="cc-root"
          data-composition-id="cuboid-carousel"
          data-start="0"
          data-duration="6.666666666666667"
          data-width="1920"
          data-height="1080"
        >
          <div data-hf-id="hf-y4po" id="cc-bg" aria-hidden="true"></div>
          <section
            data-hf-id="hf-xpi6"
            id="cc-stage"
            class="clip"
            data-start="0"
            data-duration="6.666666666666667"
            data-track-index="1"
          ></section>
          <div data-hf-id="hf-0e46" id="cc-fontload" aria-hidden="true">
            <span data-hf-id="hf-kqtg" style="font-weight: 400">Aa</span
            ><span data-hf-id="hf-grhl" style="font-weight: 500">Aa</span>
          </div>
        </div>

        <script>
          /* Studio's variables parser fails on any composition with a <canvas> in
             its MARKUP - created at runtime instead (identical for render). */
          (function () {
            var c = document.createElement("canvas");
            c.id = "cc-canvas";
            c.width = 1920;
            c.height = 1080;
            document.getElementById("cc-stage").appendChild(c);
          })();
        </script>
        <script type="module">
          /* Approved Blender choreography, 200 frames at 30 fps. Card geometry,
             content textures and lighting remain the existing live block. Motion
             uses saved native card curves and evaluated camera/handheld samples.
             Frame 31: breakaway; 90–150: locked hero; 150–190: camera fly-through. */
          import * as THREE from "three";
          import { RoomEnvironment } from "three/addons/environments/RoomEnvironment.js";
          import { mergeVertices } from "three/addons/utils/BufferGeometryUtils.js";

          import { MOTION } from "./assets/cuboid-motion.js";

          const DUR = MOTION.endFrame / MOTION.fps;
          const V =
            window.__hyperframes && window.__hyperframes.getVariables
              ? window.__hyperframes.getVariables()
              : {};

          // ---- variable readers (every one clamped to the DialKit range) ----
          const num = (v, d, lo, hi) => {
            const n = Number(v);
            return isFinite(n) ? Math.min(hi, Math.max(lo, n)) : d;
          };
          const col = (v, d) =>
            typeof v === "string" && /^#[0-9a-fA-F]{3,8}$/.test(v.trim()) ? v.trim() : d;
          const bool = (v, d) =>
            typeof v === "boolean" ? v : v === "true" ? true : v === "false" ? false : d;
          const pick = (v, opts, d) => (opts.indexOf(String(v)) >= 0 ? String(v) : d);

          // cuboid
          const WIDTH = num(V.cuboidWidth, 1.7, 0.3, 5);
          const HEIGHT = num(V.cuboidHeight, 2.4, 0.3, 6);
          const DEPTH = num(V.cuboidDepth, 0.16, 0.02, 2);
          const CORNER_R = num(V.cornerRadius, 0.105, 0, 0.6);
          const BEVEL_SIZE = num(V.bevelSize, 0.03, 0, 0.3);
          const BEVEL_THICK = num(V.bevelThickness, 0.04, 0, 0.3);
          const SMOOTH = Math.round(num(V.smoothness, 32, 1, 32));
          const ROUGH = num(V.roughness, 0.6, 0, 1);
          const METAL = num(V.metalness, 0.4, 0, 1);
          const BODY = col(V.bodyColor, "#242424");
          // layout
          const COUNT = Math.round(num(V.count, 8, 1, 12));
          const GAP = num(V.gap, 0.01, 0, 1.5);
          // rotation
          const AXIS = "x";
          // hero
          const HERO_SCALE = num(V.heroScale, 1, 1, 1.6);
          // lights
          const AMB_I = num(V.ambientIntensity, 0.35, 0, 4);
          const AMB_C = col(V.ambientColor, "#ffffff");
          const TOP_I = num(V.topIntensity, 3.1, 0, 12);
          const TOP_C = col(V.topColor, "#ffffff");
          const BOT_I = num(V.bottomIntensity, 2.15, 0, 12);
          const BOT_C = col(V.bottomColor, "#ffcaad");
          const KEY_I = num(V.keyIntensity, 5, 0, 12);
          const KEY_C = col(V.keyColor, "#ffe9d6");
          // shadows
          const SHADOW_RADIUS = num(V.shadowRadius, 44.5, 0, 50);
          const MAP_SIZE = Math.max(
            512,
            Math.min(4096, Math.round(num(V.shadowMapSize, 2048, 512, 4096) / 256) * 256),
          );
          // flat page background
          const BACKDROP = col(V.backdrop, "#0b0d13");
          // camera
          const FOV = num(V.cameraFov, 65, 10, 90);
          const CAM_X = num(V.cameraX, -0.010523080825805664, -20, 20);
          const CAM_Y = num(V.cameraY, 0.5195326805114746, -20, 20);
          const CAM_Z = num(V.cameraZ, -8.508708000183105, -20, 50);

          const TARGET_FOV = num(V.cameraTargetFov, 34, 10, 90);
          const TARGET_X = num(V.cameraTargetX, -7.25, -20, 20);
          const TARGET_Y = num(V.cameraTargetY, 1.15, -20, 20);
          const TARGET_Z = num(V.cameraTargetZ, 6.2, 2, 50);

          /* ---- derived spacing: the no-overlap floor (see header) ---- */
          const sweepHalf =
            AXIS === "x"
              ? WIDTH / 2
              : AXIS === "y"
                ? Math.hypot(WIDTH, DEPTH) / 2
                : Math.hypot(WIDTH, HEIGHT) / 2;
          const zSweepHalf =
            AXIS === "x"
              ? Math.hypot(HEIGHT, DEPTH) / 2
              : AXIS === "y"
                ? Math.hypot(WIDTH, DEPTH) / 2
                : DEPTH / 2;
          const SPACING = Math.max(WIDTH, 2 * sweepHalf + 0.02) + GAP;
          const HALF_EXTENT = sweepHalf * HERO_SCALE;

          /* ---- viewport maths (ported from viewportHalfWidth) ---- */
          const ASPECT = 1920 / 1080;
          const vFov = (FOV * Math.PI) / 180;
          const hFov = 2 * Math.atan(Math.tan(vFov / 2) * ASPECT);
          const VIEW_HALF = CAM_Z * Math.tan(hFov / 2);
          /* Off-screen test. A cuboid reaches back to z = -zSweepHalf*heroScale,
             where the frustum is WIDER than at z = 0, so culling on VIEW_HALF
             alone would clip a corner that is still in shot. Measure at the
             deepest point the geometry can reach. */
          const EDGE =
            (CAM_Z + zSweepHalf * HERO_SCALE) * Math.tan(hFov / 2) + Math.abs(CAM_X) + HALF_EXTENT; // |x| > EDGE = off-screen

          /* ================= CONTENT - edit here =================
             Each: { color, category, title, pills: [1-2 strings] }. The same array
             can be supplied at render/preview time as JSON via the `cardsJson`
             variable; anything invalid falls back to this list. */
          const CARDS = [
            {
              color: "#fe552e",
              category: "Creative requests",
              title: "Identify key resources",
              pills: ["In progress", "Jul 17, 2026"],
            },
            {
              color: "#d98a1f",
              category: "Creative requests",
              title: "Develop concept art",
              pills: ["In review", "Jul 20, 2026"],
            },
            {
              color: "#4f6ef0",
              category: "Product Development",
              title: "Create Design Prototypes",
              pills: ["In progress", "Aug 02, 2026"],
            },
            {
              color: "#1f9d57",
              category: "Project Management",
              title: "Draft Project Timeline",
              pills: ["Planned", "Aug 09, 2026"],
            },
            {
              color: "#c026d3",
              category: "Research",
              title: "Run user interviews",
              pills: ["Planned", "Aug 15, 2026"],
            },
            {
              color: "#0891b2",
              category: "Product Development",
              title: "Ship the beta",
              pills: ["Blocked", "Aug 22, 2026"],
            },
            {
              color: "#e11d48",
              category: "Creative requests",
              title: "Cut the launch film",
              pills: ["Planned", "Sep 01, 2026"],
            },
            {
              color: "#7c3aed",
              category: "Research",
              title: "Synthesise findings",
              pills: ["Planned", "Sep 08, 2026"],
            },
          ];
          const FALLBACK_COLORS = [
            "#fe552e",
            "#d98a1f",
            "#4f6ef0",
            "#1f9d57",
            "#c026d3",
            "#0891b2",
            "#e11d48",
            "#7c3aed",
          ];

          /* cardsJson override: strict parse, silent fallback on any problem. */
          let ITEMS = CARDS;
          try {
            const raw = String(V.cardsJson || "").trim();
            if (raw) {
              const parsed = JSON.parse(raw);
              if (Array.isArray(parsed) && parsed.length >= 1 && parsed.length <= 24) {
                const clean = parsed.map((e, i) => ({
                  color: typeof e.color === "string" ? e.color : FALLBACK_COLORS[i % 8],
                  category: typeof e.category === "string" ? e.category : "",
                  title: typeof e.title === "string" ? e.title : "",
                  pills: Array.isArray(e.pills) ? e.pills.slice(0, 2).map((x) => String(x)) : [],
                }));
                if (clean.every((e) => e.title)) ITEMS = clean;
              }
            }
          } catch (e) {
            /* keep CARDS */
          }

          const HERO = Math.max(0, Math.min(COUNT - 1, Math.round(num(V.heroCard, 4, 1, 12)) - 1));

          const clamp01 = (x) => Math.max(0, Math.min(1, x));
          const smooth01 = (x) => x * x * (3 - 2 * x);
          const N = MOTION.tiles.length;
          const CAMERA_SETTLE = num(V.cameraSettleFrame, 70, 20, 90);
          const T_IN = CAMERA_SETTLE / 30,
            T_BREAK = 31 / 30,
            T_CENTER = 90 / 30;
          const T_CLEAR = MOTION.tiles.find((tile) => !tile.hero).hideFrame / 30;
          const T_OUT = 150 / 30,
            T_EMPTY = 190 / 30;

          const canvas = document.getElementById("cc-canvas");
          const renderer = new THREE.WebGLRenderer({ canvas, antialias: true });
          renderer.setPixelRatio(1);
          renderer.setSize(1920, 1080, false);
          renderer.shadowMap.enabled = true;
          renderer.shadowMap.type = THREE.PCFSoftShadowMap;
          renderer.outputColorSpace = THREE.SRGBColorSpace;

          const scene = new THREE.Scene();
          scene.background = new THREE.Color(BACKDROP);
          document.getElementById("cc-bg").style.background = BACKDROP;

          const camera = new THREE.PerspectiveCamera(FOV, ASPECT, 0.1, 200);
          camera.position.set(CAM_X, CAM_Y, CAM_Z);
          camera.lookAt(0, 0, 0);

          // environment (stand-in for the `city` preset)
          const pmrem = new THREE.PMREMGenerator(renderer);
          const envRT = pmrem.fromScene(new RoomEnvironment(), 0.04);
          const envMap = envRT.texture;

          // ---- lights, exactly the experiment's rig ----
          scene.add(new THREE.AmbientLight(new THREE.Color(AMB_C), AMB_I));

          const top = new THREE.DirectionalLight(new THREE.Color(TOP_C), TOP_I);
          top.position.set(20, 9, 3);
          top.castShadow = true;
          top.shadow.mapSize.set(MAP_SIZE, MAP_SIZE);
          // "softness at the reference map size (2048)" - stable across mapSize
          top.shadow.radius = SHADOW_RADIUS * (MAP_SIZE / 2048);
          top.shadow.bias = -0.0003;
          top.shadow.normalBias = 0.02;
          {
            const c = top.shadow.camera;
            const halfW = Math.max(14, VIEW_HALF + SPACING * 3);
            const halfH = Math.max(10, HEIGHT * 0.7 + 2);
            c.left = -halfW;
            c.right = halfW;
            c.top = halfH;
            c.bottom = -halfH;
            c.near = 0.5;
            c.far = 60;
            c.updateProjectionMatrix();
          }
          scene.add(top);

          const bottom = new THREE.DirectionalLight(new THREE.Color(BOT_C), BOT_I);
          bottom.position.set(0, -8, 3);
          scene.add(bottom);

          const keyLight = new THREE.DirectionalLight(new THREE.Color(KEY_C), KEY_I);
          keyLight.position.set(12, 9.2, 7);
          scene.add(keyLight);

          /* ---- rounded-rect shape + bevelled extrude, ported from
                 roundedRectShape() / buildCardGeometry() ---- */
          function roundedRectShape(w, h, r) {
            const s = new THREE.Shape();
            const x = -w / 2,
              y = -h / 2;
            s.moveTo(x + r, y);
            s.lineTo(x + w - r, y);
            s.quadraticCurveTo(x + w, y, x + w, y + r);
            s.lineTo(x + w, y + h - r);
            s.quadraticCurveTo(x + w, y + h, x + w - r, y + h);
            s.lineTo(x + r, y + h);
            s.quadraticCurveTo(x, y + h, x, y + h - r);
            s.lineTo(x, y + r);
            s.quadraticCurveTo(x, y, x + r, y);
            s.closePath();
            return s;
          }

          function buildCardGeometry() {
            const outerR = Math.min(CORNER_R, Math.min(WIDTH, HEIGHT) / 2 - 0.001);
            const r = Math.max(outerR, 0.002);
            const bSize = Math.max(
              0,
              Math.min(BEVEL_SIZE, r * 0.98, WIDTH / 2 - 0.005, HEIGHT / 2 - 0.005),
            );
            const maxThick = Math.max(DEPTH * 0.45, 0.0005);
            const bThick = Math.max(0, Math.min(BEVEL_THICK, maxThick));
            const sizeOn = bSize > 0.0005,
              thickOn = bThick > 0.0005;
            const bevelOn = sizeOn || thickOn;
            const innerW = sizeOn ? Math.max(WIDTH - 2 * bSize, 0.01) : WIDTH;
            const innerH = sizeOn ? Math.max(HEIGHT - 2 * bSize, 0.01) : HEIGHT;
            const innerR = sizeOn ? Math.max(r - bSize, 0.002) : r;
            const extrudeDepth = thickOn ? Math.max(DEPTH - 2 * bThick, DEPTH * 0.15, 0.002) : DEPTH;

            const shape = roundedRectShape(innerW, innerH, innerR);

            // Cap UVs span the full face so the text texture lands square on it;
            // side walls collapse to a single point, as in the source.
            const uvGenerator = {
              generateTopUV(_g, vertices, a, b, c) {
                const p = (i) =>
                  new THREE.Vector2(
                    (vertices[i * 3] + WIDTH / 2) / WIDTH,
                    (vertices[i * 3 + 1] + HEIGHT / 2) / HEIGHT,
                  );
                return [p(a), p(b), p(c)];
              },
              generateSideWallUV() {
                return [
                  new THREE.Vector2(0, 0),
                  new THREE.Vector2(0, 0),
                  new THREE.Vector2(0, 0),
                  new THREE.Vector2(0, 0),
                ];
              },
            };

            const geo = new THREE.ExtrudeGeometry(shape, {
              depth: extrudeDepth,
              bevelEnabled: bevelOn,
              bevelThickness: bThick,
              bevelSize: bSize,
              bevelSegments: Math.max(16, Math.round(SMOOTH * 2)),
              curveSegments: Math.max(16, Math.round(SMOOTH)),
              steps: 1,
              UVGenerator: uvGenerator,
            });
            geo.center();
            if (bevelOn) {
              const merged = mergeVertices(geo, 1e-4);
              geo.dispose();
              merged.computeVertexNormals();
              merged.computeBoundingSphere();
              return merged;
            }
            geo.computeVertexNormals();
            geo.computeBoundingSphere();
            return geo;
          }

          /* ---- face texture, ported from face-renderer.ts (540x756).
                 The source clears to transparent and lets the body colour show
                 through a masking shader; painting the body colour in first gives
                 the same result without the extra pass. ---- */
          const FACE_W = 540,
            FACE_H = 756;
          const FONT_STACK = '"Inter", -apple-system, system-ui, sans-serif';

          function lightTint(hex, amount = 0.55) {
            return new THREE.Color(hex).lerp(new THREE.Color("#ffffff"), amount).getStyle();
          }
          function roundedRectPath(ctx, x, y, w, h, r) {
            const radius = Math.min(r, w / 2, h / 2);
            ctx.beginPath();
            ctx.moveTo(x + radius, y);
            ctx.arcTo(x + w, y, x + w, y + h, radius);
            ctx.arcTo(x + w, y + h, x, y + h, radius);
            ctx.arcTo(x, y + h, x, y, radius);
            ctx.arcTo(x, y, x + w, y, radius);
            ctx.closePath();
          }
          function wrapLines(ctx, text, maxWidth) {
            const words = String(text).split(" ");
            const lines = [];
            let current = "";
            for (const word of words) {
              const candidate = current ? current + " " + word : word;
              if (ctx.measureText(candidate).width > maxWidth && current) {
                lines.push(current);
                current = word;
              } else current = candidate;
            }
            if (current) lines.push(current);
            return lines;
          }

          function faceTexture(item) {
            const c = document.createElement("canvas");
            c.width = FACE_W;
            c.height = FACE_H;
            const ctx = c.getContext("2d");
            ctx.fillStyle = BODY;
            ctx.fillRect(0, 0, FACE_W, FACE_H);

            const tint = lightTint(item.color);
            const pad = 45;
            const contentW = FACE_W - pad * 2;
            let y = pad + 8;

            ctx.textBaseline = "alphabetic";
            ctx.textAlign = "left";

            ctx.fillStyle = tint;
            ctx.font = "400 25px " + FONT_STACK;
            ctx.fillText(item.category, pad, y + 22);
            y += 22 + 34;

            ctx.fillStyle = "#ffffff";
            ctx.font = "500 38px " + FONT_STACK;
            for (const line of wrapLines(ctx, item.title, contentW)) {
              ctx.fillText(line, pad, y + 34);
              y += 47;
            }

            ctx.font = "400 19px " + FONT_STACK;
            const pillH = 50;
            const pillY = FACE_H - pad - pillH;
            let pillX = pad;
            for (const label of item.pills) {
              const pillW = ctx.measureText(label).width + 44;
              roundedRectPath(ctx, pillX, pillY, pillW, pillH, pillH / 2);
              ctx.strokeStyle = tint;
              ctx.lineWidth = 1.4;
              ctx.stroke();
              ctx.fillStyle = tint;
              ctx.textBaseline = "middle";
              ctx.fillText(label, pillX + 22, pillY + pillH / 2 + 1);
              ctx.textBaseline = "alphabetic";
              pillX += pillW + 15;
            }

            const tex = new THREE.CanvasTexture(c);
            tex.flipY = false;
            tex.colorSpace = THREE.SRGBColorSpace;
            tex.anisotropy = 8;
            tex.minFilter = THREE.LinearMipmapLinearFilter;
            tex.magFilter = THREE.LinearFilter;
            return tex;
          }

          // ---- build the chain ----
          const geometry = buildCardGeometry();
          const sideMat = new THREE.MeshStandardMaterial({
            color: new THREE.Color(BODY),
            roughness: ROUGH,
            metalness: METAL,
            envMap,
            envMapIntensity: 0.3,
          });
          const EULER_ORDER = AXIS === "x" ? "XYZ" : AXIS === "y" ? "YXZ" : "ZXY";

          let capMats = [];
          let heroMat = null;
          let cuboids = [];
          function buildChain() {
            if (heroMat) heroMat.dispose();
            capMats.forEach((m) => {
              if (m.map) m.map.dispose();
              m.dispose();
            });
            capMats = ITEMS.map((item) => {
              const capMat = new THREE.MeshStandardMaterial({
                map: faceTexture(item),
                roughness: ROUGH,
                metalness: METAL,
                envMap,
                envMapIntensity: 0,
              });
              /* The source masks content to the front cap with a smoothstep on
                 position.z (uHalfDepth / uCapBand). Same idea: the back cap drops
                 the map and shows plain body colour, so text never reads mirrored. */
              capMat.onBeforeCompile = (shader) => {
                shader.uniforms.uBody = { value: new THREE.Color(BODY) };
                shader.vertexShader = shader.vertexShader
                  .replace("#include <common>", "#include <common>\nvarying float vLocalZ;")
                  .replace("#include <begin_vertex>", "#include <begin_vertex>\nvLocalZ = position.z;");
                shader.fragmentShader = shader.fragmentShader
                  .replace(
                    "#include <common>",
                    "#include <common>\nvarying float vLocalZ;\nuniform vec3 uBody;",
                  )
                  .replace(
                    "#include <map_fragment>",
                    "#include <map_fragment>\nif (vLocalZ > 0.0) diffuseColor.rgb = uBody;",
                  )
                  .replace(
                    "#include <emissivemap_fragment>",
                    "#include <emissivemap_fragment>\nif (vLocalZ > 0.0) totalEmissiveRadiance = vec3(0.0);",
                  );
              };
              return capMat;
            });
            // A separate material avoids brightening repeated cards with the same
            // content. Emissive fill is masked off the unprinted back cap as well.
            const heroSource = capMats[HERO % ITEMS.length];
            heroMat = heroSource.clone();
            heroMat.onBeforeCompile = heroSource.onBeforeCompile;
            heroMat.emissive.set(0xffffff);
            heroMat.emissiveMap = heroSource.map;
            heroMat.emissiveIntensity = 0;
            if (cuboids.length === 0) {
              for (let j = 0; j < N; j++) {
                // ExtrudeGeometry group 0 = caps, group 1 = side walls
                const mesh = new THREE.Mesh(geometry, [capMats[0], sideMat]);
                mesh.rotation.order = EULER_ORDER;
                mesh.castShadow = true;
                mesh.receiveShadow = true;
                scene.add(mesh);
                cuboids.push(mesh);
              }
            }
          }
          buildChain();

          // Blender frame 0 maps to web time 0. Every pose is reconstructed on seek.
          const basis = new THREE.Quaternion().setFromAxisAngle(
            new THREE.Vector3(1, 0, 0),
            -Math.PI / 2,
          );
          const inverseBasis = basis.clone().invert();
          const sourceRoot = new THREE.Matrix4().set(...MOTION.rootMatrix);
          const convertedRoot = new THREE.Matrix4()
            .makeRotationFromQuaternion(basis)
            .multiply(sourceRoot)
            .multiply(new THREE.Matrix4().makeRotationFromQuaternion(inverseBasis));
          const motionRoot = new THREE.Group();
          motionRoot.name = "Blender approved Cuboid chain";
          motionRoot.matrixAutoUpdate = false;
          motionRoot.matrix.copy(convertedRoot);
          scene.add(motionRoot);
          for (const mesh of cuboids) motionRoot.add(mesh);
          const heroSlot = MOTION.tiles.findIndex((tile) => tile.hero);
          const sourceStart = new THREE.Vector3(...MOTION.cameraStart).applyQuaternion(basis);
          const sourceEnd = new THREE.Vector3(...MOTION.cameraEnd).applyQuaternion(basis);
          const startOffset = new THREE.Vector3(CAM_X, CAM_Y, CAM_Z).sub(sourceStart);
          const endOffset = new THREE.Vector3(TARGET_X, TARGET_Y, TARGET_Z).sub(sourceEnd);
          const hasCameraOffset = startOffset.lengthSq() + endOffset.lengthSq() > 1e-14;
          const targetCamera = new THREE.Vector3(TARGET_X, TARGET_Y, TARGET_Z);
          const samplePosition = new THREE.Vector3(),
            basePosition = new THREE.Vector3();
          const sampleQuaternion = new THREE.Quaternion(),
            baseQuaternion = new THREE.Quaternion();
          const qA = new THREE.Quaternion(),
            qB = new THREE.Quaternion(),
            qDelta = new THREE.Quaternion();
          const poseEuler = new THREE.Euler(0, 0, 0, "ZYX");
          const lookCamera = new THREE.PerspectiveCamera();
          const zero = new THREE.Vector3();
          const S = { t: 0 };
          const HERO_FILL = num(V.heroFillIntensity, 0.55, 0, 2);
          const HANDHELD = num(V.handheldStrength, 1, 0, 1);
          const EXIT_ANGLES = [
            num(V.heroExitX, 288, -720, 720),
            num(V.heroExitY, -234, -720, 720),
            num(V.heroExitZ, 198, -720, 720),
          ];
          const sourceExitAngles = [288, -234, 198];

          function channelAt(keys, frame) {
            if (!keys || !keys.length) return 0;
            if (frame <= keys[0][0]) return keys[0][1];
            let lo = 0,
              hi = keys.length - 1;
            if (frame >= keys[hi][0]) return keys[hi][1];
            while (hi - lo > 1) {
              const mid = (lo + hi) >> 1;
              if (keys[mid][0] <= frame) lo = mid;
              else hi = mid;
            }
            const a = keys[lo],
              b = keys[hi],
              u = (frame - a[0]) / (b[0] - a[0]);
            return a[1] + (b[1] - a[1]) * u;
          }
          function readCamera(frame, position, quaternion) {
            const f = Math.max(0, Math.min(MOTION.endFrame, frame));
            const i = Math.floor(f),
              j = Math.min(MOTION.endFrame, i + 1),
              u = f - i;
            const a = MOTION.camera[i],
              b = MOTION.camera[j];
            position
              .set(a[0] + (b[0] - a[0]) * u, a[1] + (b[1] - a[1]) * u, a[2] + (b[2] - a[2]) * u)
              .applyQuaternion(basis);
            qA.set(a[3], a[4], a[5], a[6]);
            qB.set(b[3], b[4], b[5], b[6]);
            // Camera optical axes are already -Z forward / +Y up: convert world basis only.
            quaternion.slerpQuaternions(qA, qB, u).premultiply(basis).normalize();
            return a[7] + (b[7] - a[7]) * u;
          }
          function cameraAt(frame) {
            const cameraFrame =
              frame < CAMERA_SETTLE ? (frame * 70) / CAMERA_SETTLE : Math.max(70, frame);
            const sourceFov = readCamera(cameraFrame, samplePosition, sampleQuaternion);
            const inHandheld = frame > 90 && frame < 150;
            if (inHandheld) {
              readCamera(90, basePosition, baseQuaternion);
              if (HANDHELD !== 1) {
                samplePosition.lerpVectors(basePosition, samplePosition, HANDHELD);
                sampleQuaternion.slerpQuaternions(baseQuaternion, sampleQuaternion, HANDHELD);
              }
            } else {
              basePosition.copy(samplePosition);
              baseQuaternion.copy(sampleQuaternion);
            }
            const u = clamp01(
              (MOTION.cameraControls["Start FOV degrees"] - sourceFov) /
                (MOTION.cameraControls["Start FOV degrees"] - MOTION.cameraControls["End FOV degrees"]),
            );
            // A changed start must not recompute the approved settled/handheld pose.
            if (hasCameraOffset && (u < 1 || endOffset.lengthSq() > 1e-14)) {
              qDelta.copy(baseQuaternion).invert().multiply(sampleQuaternion);
              const offset = startOffset.clone().lerp(endOffset, u);
              lookCamera.position.copy(basePosition).add(offset);
              lookCamera.lookAt(zero);
              sampleQuaternion.copy(lookCamera.quaternion).multiply(qDelta);
              samplePosition.add(offset);
            }
            camera.position.copy(samplePosition);
            camera.quaternion.copy(sampleQuaternion);
            camera.fov = FOV === 65 && TARGET_FOV === 34 ? sourceFov : FOV + (TARGET_FOV - FOV) * u;
            camera.updateProjectionMatrix();
            camera.updateMatrixWorld();
          }
          const heroInitialX = MOTION.tiles[heroSlot].channels.location[0][0][1];
          const slotOffsets = MOTION.tiles.map(
            (tile) => (tile.channels.location[0][0][1] - heroInitialX) / 1.73,
          );
          // One mesh owns the hero slot before and after separation. Its arrival
          // must use the same transport as the constant-rate chain, not the old
          // slower Blender arrival curve. Keep that transport while it first lifts
          // clear, then rejoin the approved absolute path without a position jump.
          const heroXKeys = MOTION.tiles[heroSlot].channels.location[0];
          const chainXKeys = MOTION.tiles.find((tile) => !tile.hero).channels.location[0];
          const HERO_SLOT_RELEASE = 36,
            HERO_PATH_REJOIN = 70;
          const heroSlotXAt = (frame) => heroInitialX + channelAt(chainXKeys, frame) - chainXKeys[0][1];
          const heroSlotDelta =
            heroSlotXAt(HERO_SLOT_RELEASE) - channelAt(heroXKeys, HERO_SLOT_RELEASE);
          const heroSlotVelocityDelta =
            (heroSlotXAt(HERO_SLOT_RELEASE) -
              heroSlotXAt(HERO_SLOT_RELEASE - 0.25) -
              channelAt(heroXKeys, HERO_SLOT_RELEASE) +
              channelAt(heroXKeys, HERO_SLOT_RELEASE - 0.25)) /
            0.25;
          function heroSlotCorrection(frame) {
            if (frame <= HERO_SLOT_RELEASE) return heroSlotXAt(frame) - channelAt(heroXKeys, frame);
            if (frame >= HERO_PATH_REJOIN) return 0;
            const duration = HERO_PATH_REJOIN - HERO_SLOT_RELEASE;
            const u = (frame - HERO_SLOT_RELEASE) / duration,
              u2 = u * u,
              u3 = u2 * u;
            return (
              (2 * u3 - 3 * u2 + 1) * heroSlotDelta +
              (u3 - 2 * u2 + u) * duration * heroSlotVelocityDelta
            );
          }
          const heroExitBase = MOTION.tiles[heroSlot].channels.rotation_euler.map((keys) =>
            channelAt(keys, 150),
          );
          const actualPose = { frame: 0, camera: [], hero: [], heroRotation: [], visibleTiles: 0 };
          function renderAt(time) {
            S.t = Math.max(0, Math.min(DUR, time));
            const frame = S.t * MOTION.fps;
            cameraAt(frame);
            const heroProgress = smooth01(clamp01((frame - 31) / 59));
            heroMat.emissiveIntensity = HERO_FILL * heroProgress;
            let visibleTiles = 0;
            for (let j = 0; j < cuboids.length; j++) {
              const mesh = cuboids[j],
                tile = MOTION.tiles[j],
                c = tile.channels;
              const p = c.location.map((keys) => channelAt(keys, frame));
              if (tile.hero) p[0] += heroSlotCorrection(frame);
              const r = c.rotation_euler.map((keys) => channelAt(keys, frame));
              if (tile.hero && frame > 150) {
                for (let axis = 0; axis < 3; axis++)
                  r[axis] =
                    heroExitBase[axis] +
                    ((r[axis] - heroExitBase[axis]) * EXIT_ANGLES[axis]) / sourceExitAngles[axis];
              }
              mesh.position.set(p[0], p[2], -p[1]);
              if (!tile.hero) mesh.position.x += slotOffsets[j] * (SPACING - 1.73);
              // Blender XYZ is extrinsic X→Y→Z; Three's matching Euler order is ZYX.
              poseEuler.set(r[0], r[1], r[2], "ZYX");
              mesh.quaternion.setFromEuler(poseEuler).premultiply(basis).multiply(inverseBasis);
              const scale = c.scale.map((keys) => channelAt(keys, frame));
              mesh.scale.set(scale[0], scale[2], scale[1]);
              if (tile.hero) mesh.scale.multiplyScalar(1 + (HERO_SCALE - 1) * heroProgress);
              const item = ((((tile.itemIndex + HERO - 3) % COUNT) + COUNT) % COUNT) % ITEMS.length;
              mesh.material[0] = tile.hero && frame >= 31 ? heroMat : capMats[item];
              mesh.visible = frame < tile.hideFrame;
              if (mesh.visible) visibleTiles++;
              if (tile.hero) {
                actualPose.hero = mesh.position.toArray();
                actualPose.heroRotation = r;
              }
            }
            actualPose.frame = frame;
            actualPose.camera = camera.position.toArray();
            actualPose.visibleTiles = visibleTiles;
            renderer.toneMappingExposure = 1;
            renderer.render(scene, camera);
          }
          window.__cuboidMotion = {
            source: MOTION.sourceFile,
            sha256: MOTION.sourceSha256,
            fps: MOTION.fps,
            endFrame: MOTION.endFrame,
            phases: {
              breakaway: 31,
              directApproach: 40,
              centered: 90,
              exit: 150,
              clear: 190,
              end: 200,
            },
            get pose() {
              return { ...actualPose };
            },
          };

          /* ---- timeline: paused, seek-safe, no rAF ---- */
          window.__timelines = window.__timelines || {};
          const tl = gsap.timeline({ paused: true });
          tl.addLabel("arrival", 0);
          tl.addLabel("alternate-camera", T_IN);
          tl.addLabel("hero-breakaway", T_BREAK);
          tl.addLabel("hero-centered", T_CENTER);
          tl.addLabel("solo-hold", T_CLEAR);
          tl.addLabel("hero-exit", T_OUT);
          tl.addLabel("empty", T_EMPTY);
          tl.to(S, { t: DUR, duration: DUR, ease: "none" }, 0);
          tl.eventCallback("onUpdate", () => renderAt(S.t));

          /* Studio's player seeks with GSAP events suppressed and dispatches an
             hf-seek CustomEvent instead - re-sync and repaint so the stage follows. */
          window.addEventListener("hf-seek", function (event) {
            const d = event && event.detail;
            if (d && typeof d.time === "number")
              tl.totalTime(Math.min(d.time, tl.totalDuration()), true);
            const fn = tl.eventCallback("onUpdate");
            if (fn) fn();
          });
          window.__timelines["cuboid-carousel"] = tl;

          renderAt(0);
          /* Draw across the timeline and flush the GPU before ready, so shader links
             and texture uploads land in the readiness gate, not the first visible frames. */
          async function warmGpu() {
            for (const f of [0.25, 0.5, 0.75]) {
              await new Promise((resolve) => setTimeout(resolve, 0));
              renderAt(DUR * f);
            }
            renderAt(S.t);
            renderer.getContext().finish();
          }
          window.__hf = window.__hf || {};
          window.__hf.buildReady = window.__hf.buildReady || {};
          window.__hf.buildReady["cuboid-carousel"] = (
            document.fonts && document.fonts.ready ? document.fonts.ready : Promise.resolve()
          )
            .then(() => {
              buildChain();
              renderAt(S.t);
              return warmGpu();
            })
            .catch(() => {});
        </script>
        <script>
          /* Standalone playback: open this file with ?play (add &loop to repeat).
             Inert without the param — Studio and the renderer never add it, so
             editing and deterministic renders are unaffected. */
          (function () {
            var q = new URLSearchParams(location.search);
            if (!q.has("play")) return;
            var tick = setInterval(function () {
              var map = window.__timelines || {};
              var ids = Object.keys(map);
              if (!ids.length) return;
              clearInterval(tick);
              for (var i = 0; i < ids.length; i++) {
                var tl = map[ids[i]];
                if (q.has("loop")) tl.repeat(-1);
                tl.play(0);
              }
            }, 100);
          })();
        </script>
      </body>
    </html>
    ```
  </CatalogSlot>

  <CatalogSlot slot="install">
    <InstallCommand command="npx hyperframes add cuboid-carousel" item="cuboid-carousel" />

    That writes `compositions/cuboid-carousel/cuboid-carousel.html`, plus 9 supporting files under `compositions/cuboid-carousel/assets/`, `compositions/cuboid-carousel/assets/addons/environments/`, `compositions/cuboid-carousel/assets/addons/utils/`, and `compositions/cuboid-carousel/`.
  </CatalogSlot>

  <CatalogSlot slot="docs">
    ## Add it to your video

    It runs for 6.67 seconds at 1920×1080. Paste this into your composition:

    ```html index.html theme={null}
    <div
      data-composition-id="cuboid-carousel"
      data-composition-src="compositions/cuboid-carousel/cuboid-carousel.html"
      data-start="0"
      data-duration="6.67"
      data-track-index="1"
      data-width="1920"
      data-height="1080"
    ></div>
    ```

    Move it in time with `data-start`. Put it on a different timeline row with
    `data-track-index`. See [data attributes](/concepts/data-attributes) for the rest.

    Tagged `3d-motion` `carousel` `cards` `travelling-wave` `pbr` `shadows` `room-environment`.

    ## Related topics

    * [Browse the complete Catalog](/catalog)
    * [Add assets and Catalog items in Studio](/studio/assets-and-blocks)
    * [Build a richer composition](/go-further)
  </CatalogSlot>
</CatalogDetail>


## Related topics

- [Orbit Carousel 3](/catalog/blocks/carousel-orbit-3.md)
- [Orbit Carousel 4](/catalog/blocks/carousel-orbit-4.md)
- [Orbit Carousel 5](/catalog/blocks/carousel-orbit-5.md)