> ## Documentation Index
> Fetch the complete documentation index at: https://hyperframes-feat-ad94-tune-scroll-cue.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Variable Font Flex

> A word lands while its variable-font weight and width axes flex from hairline-condensed to black-wide with per-character stagger; font-size eases inversely so the letterforms gain mass while the box holds.

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-wrap { position: relative; flex: 1; min-height: 0; display: flex; }
.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-more {
  position: absolute;
  left: 50%;
  bottom: 6px;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 9999px;
  background: var(--ve-hover);
  color: var(--ve-muted);
  pointer-events: none;
  animation: hf-ve-tune-more-pulse 1.6s ease-in-out infinite;
}
@keyframes hf-ve-tune-more-pulse {
  0%, 100% { opacity: 1; transform: translateX(-50%) scale(1); }
  50% { opacity: 0.55; transform: translateX(-50%) scale(1.15); }
}
@media (prefers-reduced-motion: reduce) {
  .hf-ve-tune-more { animation: none; }
}
.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>
                <TuneList variables={variables} values={values} notes={notes} onValues={setValues} onNotes={setNotes} onTyping={setTyping} control={control} readout={readout} />
                <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/components/variable-font-flex.json" compositionId="variable-font-flex" compositionSrc="compositions/components/variable-font-flex.html" title="Variable Font Flex" description="A word lands while its variable-font weight and width axes flex from hairline-condensed to black-wide with per-character stagger; font-size eases inversely so the letterforms gain mass while the box holds." variables={[{"id":"text","type":"string","role":"content","label":"Text","description":"The word whose variable-font axes flex.","default":"FLEX"},{"id":"axis","type":"enum","role":"style","label":"Axis","description":"Which variable-font axes animate: weight, width, or both.","default":"both","options":[{"value":"weight","label":"Weight"},{"value":"width","label":"Width"},{"value":"both","label":"Both"}]},{"id":"stagger","type":"number","role":"timing","label":"Stagger","description":"Seconds between per-character flex starts, clamped 0 to 0.25.","default":0.06},{"id":"accent","type":"enum","role":"style","label":"Accent","description":"Word color: green rides --brand, blue rides --accent, violet rides --accent-2.","default":"green","options":[{"value":"green","label":"Green"},{"value":"blue","label":"Blue"},{"value":"violet","label":"Violet"}]},{"id":"exit","type":"enum","role":"timing","label":"Exit","description":"Optional departure. Default none: the carved word holds until the frame cuts.","default":"none","options":[{"value":"none","label":"None"},{"value":"fade","label":"Fade"},{"value":"up","label":"Up"}]}]} meta={{"category":"Motion Scenes","badge":"Stable","codeLines":304}} attribution={{"path":"registry/components/variable-font-flex","tags":["motion-primitive","experiment","type","variable-font","deterministic"]}} hasCode rawUrl="https://raw.githubusercontent.com/heygen-com/hyperframes/main/registry/components/variable-font-flex/variable-font-flex.html">
  <CatalogSlot slot="code">
    ```html variable-font-flex.html theme={null}
    <!doctype html>
    <!--
      variable-font-flex: HyperFrames video primitive (type / Wave M experiment M5)

      A word lands while its variable-font axes flex: each character rises from
      hairline-condensed to black-wide (weight 120 to 840, width 40 to 128) with
      a per-character stagger and a small carve-in overshoot, then settles. The
      word's font-size eases INVERSELY to the mean axis progress (optical
      compensation), so the letterforms gain mass while the word's box barely
      grows: ink swells, layout holds.

      Font: Roboto Flex Variable, pinned via the Fontsource CDN build
      (@fontsource-variable/roboto-flex@5.2.8, latin "standard" subset:
      wght 100..1000 and wdth 25%..151% in one woff2). Inter var was considered
      per the spec but Inter carries NO wdth axis, and this unit's width mode
      needs a real one; Roboto Flex has both. The @font-face below pins the
      exact file. The pinned font IS the mechanic, so this unit deliberately
      does not ride --font-display: a theme font without matching axes would
      kill the effect. The landing weight (840) is the animated mechanic, not
      static register styling.

      Variables (declared in data-composition-variables below):
        - text (string, default "FLEX"): the word.
        - axis ("weight" | "width" | "both", default "both"): which axes flex.
          weight holds wdth at 100; width holds wght at 620.
        - stagger (number seconds, default 0.06, clamped 0 to 0.25): per-char
          offset between axis flex starts.
        - accent ("green" | "blue" | "violet", default "green"): green rides
          --brand, blue rides --accent, violet rides --accent-2.
        - exit ("none" | "fade" | "up", default "none").

      Envelope, fixed IN and OUT with elastic HOLD only (never timeScale):
        IN_BASE  = 0.12 lead + (chars - 1) * stagger + 1.15 flex + 0.15 margin
        HOLD     = max(0, D - IN - OUT), truly still
        OUT_BASE = 0.45s only when exit != none
        If D < IN_BASE + OUT_BASE the whole envelope compresses together.

      Determinism and seek-safety: NO tween ever touches the
      font-variation-settings string. One inert anchor tween spans [0, D]; on
      every update a painter recomputes each character's axis numbers as a pure
      function of tl.time() (a number proxy per char) and composes the
      '"wght" W, "wdth" D' string from those numbers, plus the word-level
      compensated font-size. Writes are idempotent; eventful seeks
      (suppressEvents=false) land identical frames in any order and direction.

      Mount contract: the runtime clones only this template. #root fills the
      host box (no data-width/data-height, container-type: size, cqmin units),
      is styled via #root only, and registers one paused timeline under the
      LITERAL "variable-font-flex" key.
    -->
    <html
      lang="en"
      data-composition-id="variable-font-flex"
      data-composition-duration="3.5"
      data-composition-variables='[
        { "id": "text", "type": "string", "role": "content", "label": "Text", "description": "The word whose variable-font axes flex.", "default": "FLEX" },
        { "id": "axis", "type": "enum", "role": "style", "label": "Axis", "description": "Which variable-font axes animate: weight, width, or both.", "default": "both", "options": [{ "value": "weight", "label": "Weight" }, { "value": "width", "label": "Width" }, { "value": "both", "label": "Both" }] },
        { "id": "stagger", "type": "number", "role": "timing", "label": "Stagger", "description": "Seconds between per-character flex starts, clamped 0 to 0.25.", "default": 0.06 },
        { "id": "accent", "type": "enum", "role": "style", "label": "Accent", "description": "Word color: green rides --brand, blue rides --accent, violet rides --accent-2.", "default": "green", "options": [{ "value": "green", "label": "Green" }, { "value": "blue", "label": "Blue" }, { "value": "violet", "label": "Violet" }] },
        { "id": "exit", "type": "enum", "role": "timing", "label": "Exit", "description": "Optional departure. Default none: the carved word holds until the frame cuts.", "default": "none", "options": [{ "value": "none", "label": "None" }, { "value": "fade", "label": "Fade" }, { "value": "up", "label": "Up" }] }
      ]'
    >
      <head>
        <meta charset="UTF-8" />
        <title>Variable Font Flex</title>
      </head>
      <body>
        <template>
          <div id="root" data-composition-id="variable-font-flex" data-duration="3.5" data-fps="30">
            <style>
              /* Pinned variable font: Fontsource build of Roboto Flex, latin
                 standard subset, wght 100..1000 + wdth 25%..151% in one file.
                 @fontsource-variable/roboto-flex@5.2.8 on jsdelivr. */
              @font-face {
                font-family: "Roboto Flex Variable";
                font-style: normal;
                font-display: block;
                font-weight: 100 1000;
                font-stretch: 25% 151%;
                src: url(https://cdn.jsdelivr.net/npm/@fontsource-variable/roboto-flex@5.2.8/files/roboto-flex-latin-standard-normal.woff2)
                  format("woff2-variations");
              }

              *,
              *::before,
              *::after {
                box-sizing: border-box;
              }

              #root {
                position: absolute;
                inset: 0;
                overflow: hidden;
                container-type: size;
                isolation: isolate;
                color: var(--fg, #f8fafc);
                font-family: "Roboto Flex Variable", system-ui, sans-serif;
                pointer-events: none;
              }

              .vff-clip {
                position: absolute;
                inset: 0;
                display: grid;
                place-items: center;
                overflow: hidden;
                background: var(--bg, transparent);
              }

              .vff-stage {
                display: block;
                max-width: 94cqw;
                will-change: transform, opacity;
              }

              .vff-word {
                display: flex;
                align-items: baseline;
                justify-content: center;
                color: var(--vff-accent);
                line-height: 1;
                white-space: pre;
              }

              .vff-char {
                position: relative;
                display: inline-block;
                white-space: pre;
                /* No will-change and no transform on chars: per-char compositor
                   layer promotion makes glyph antialiasing depend on seek
                   history (paint-level nondeterminism); the rise rides
                   relative top instead. */
              }
            </style>

            <div
              id="variable-font-flex-clip"
              class="vff-clip clip"
              data-start="0"
              data-duration="3.5"
              data-track-index="0"
            >
              <div class="vff-stage" role="img">
                <div class="vff-word" aria-hidden="true"></div>
              </div>
            </div>

            <script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
            <script>
              (function () {
                "use strict";

                var root = document.getElementById("root");
                var stage = root.querySelector(".vff-stage");
                var word = root.querySelector(".vff-word");
                var vars =
                  window.__hyperframes && window.__hyperframes.getVariables
                    ? window.__hyperframes.getVariables()
                    : {};

                var text = vars.text == null || vars.text === "" ? "FLEX" : String(vars.text);
                var axis = vars.axis === "weight" || vars.axis === "width" ? vars.axis : "both";
                var staggerRaw = parseFloat(vars.stagger);
                var stagger = isFinite(staggerRaw) ? Math.min(0.25, Math.max(0, staggerRaw)) : 0.06;
                // Each enum choice routes to a DIFFERENT contract token so the
                // variable stays meaningful under a theme.
                var accentColors = {
                  green: "var(--brand, #52525b)",
                  blue: "var(--accent, #52525b)",
                  violet: "var(--accent-2, #52525b)",
                };
                var accent = Object.prototype.hasOwnProperty.call(accentColors, vars.accent)
                  ? vars.accent
                  : "green";
                var exit = vars.exit === "fade" || vars.exit === "up" ? vars.exit : "none";

                root.style.setProperty("--vff-accent", accentColors[accent]);
                stage.setAttribute("aria-label", text);

                // Axis endpoints. Non-animated axes hold a fixed value so the
                // composed string is always complete and orderable.
                var WGHT_FROM = axis === "width" ? 620 : 120;
                var WGHT_TO = axis === "width" ? 620 : 840;
                var WDTH_FROM = axis === "weight" ? 100 : 40;
                var WDTH_TO = axis === "weight" ? 100 : 128;
                // Optical compensation strength per mode: how much of the mass
                // gain the font-size gives back so the box barely grows.
                var COMP = axis === "both" ? 0.16 : axis === "width" ? 0.12 : 0.08;

                // Build one span per character; spaces stay in flow (white-space:
                // pre) but never animate.
                var characters = Array.from(text);
                var hostDoc = root.ownerDocument;
                var chars = [];
                var fragment = hostDoc.createDocumentFragment();
                for (var i = 0; i < characters.length; i += 1) {
                  var span = hostDoc.createElement("span");
                  span.className = "vff-char";
                  span.textContent = characters[i];
                  fragment.appendChild(span);
                  if (!/\s/.test(characters[i])) chars.push({ el: span, index: i });
                }
                word.appendChild(fragment);

                // Fit for the FINAL (wide, black) state; compensation only ever
                // shrinks below this. cqw base capped by cqh so short words on
                // wide hosts stay inside the frame.
                var fitted = Math.min(21, 118 / Math.max(3, characters.length));
                var BASE_SIZE = "min(" + fitted.toFixed(3) + "cqw, 30cqh)";
                root.style.setProperty("--vff-size", BASE_SIZE);
                word.style.fontSize = "var(--vff-size)";

                // Envelope: fixed IN/OUT, elastic HOLD, never time-scaled.
                var LEAD = 0.12;
                var FLEX = 1.15;
                var MARGIN = 0.15;
                var IN_BASE = LEAD + Math.max(0, chars.length - 1) * stagger + FLEX + MARGIN;
                var OUT_BASE = exit === "none" ? 0 : 0.45;
                var duration = Math.max(0.001, parseFloat(root.dataset.duration || "3.5"));
                var totalBase = Math.max(0.001, IN_BASE + OUT_BASE);
                var scale = duration < totalBase ? duration / totalBase : 1;
                var lead = LEAD * scale;
                var flex = FLEX * scale;
                var staggerEff = stagger * scale;
                var IN = IN_BASE * scale;
                var OUT = OUT_BASE * scale;
                var HOLD = Math.max(0, duration - (IN + OUT));
                var OUT_START = IN + HOLD;

                function clamp01(v) {
                  return v < 0 ? 0 : v > 1 ? 1 : v;
                }
                // Carve ease: overshoots ~6% past the target, then settles. The
                // painter clamps composed axis values to the font's real ranges.
                function carve(u) {
                  var c1 = 0.9;
                  var c3 = c1 + 1;
                  var x = u - 1;
                  return 1 + c3 * x * x * x + c1 * x * x;
                }
                function clampAxis(v, lo, hi) {
                  return v < lo ? lo : v > hi ? hi : v;
                }

                // Pure per-update painter: every character's axis NUMBERS are a
                // function of tl.time() alone; the font-variation-settings
                // string is composed from those numbers (the number proxy; the
                // string itself is never tweened). The word-level font-size
                // eases inversely to the mean settled progress: optical
                // compensation, mass grows while the box holds.
                function applyTime(timeSeconds) {
                  var settledSum = 0;
                  for (var c = 0; c < chars.length; c += 1) {
                    var start = lead + c * staggerEff;
                    var u = clamp01(flex > 0 ? (timeSeconds - start) / flex : 1);
                    var e = u <= 0 ? 0 : u >= 1 ? 1 : carve(u);
                    var settled = e > 1 ? 1 : e;
                    settledSum += settled;
                    var wght = clampAxis(WGHT_FROM + (WGHT_TO - WGHT_FROM) * e, 100, 1000);
                    var wdth = clampAxis(WDTH_FROM + (WDTH_TO - WDTH_FROM) * e, 25, 151);
                    var el = chars[c].el;
                    el.style.fontVariationSettings =
                      '"wght" ' + wght.toFixed(1) + ', "wdth" ' + wdth.toFixed(2);
                    var oIn = clamp01(flex > 0 ? (timeSeconds - start) / (flex * 0.22) : 1);
                    el.style.opacity = (oIn * oIn * (3 - 2 * oIn)).toFixed(4);
                    el.style.top = ((1 - settled) * 0.14).toFixed(4) + "em";
                  }
                  var mean = chars.length > 0 ? settledSum / chars.length : 1;
                  word.style.fontSize = "calc(var(--vff-size) * " + (1 - COMP * mean).toFixed(4) + ")";
                }

                gsap.set(stage, { opacity: 1, y: "0cqh" });

                var tl = gsap.timeline({
                  paused: true,
                  onUpdate: function () {
                    applyTime(tl.time());
                  },
                });

                // Anchor tween: an inert plain-object tween spanning [0, D] so
                // onUpdate fires for every eventful seek and holds never clamp.
                tl.to({ p: 0 }, { p: 1, duration: duration, ease: "none" }, 0);

                // HOLD: truly still; repeated repaints write identical values.

                // OUT: optional departure; exit none holds until the frame cuts.
                if (exit === "up") {
                  tl.to(stage, { y: "-4cqh", duration: OUT, ease: "power2.in" }, OUT_START);
                  tl.to(stage, { opacity: 0, duration: OUT, ease: "power2.in" }, OUT_START);
                } else if (exit === "fade") {
                  tl.to(stage, { opacity: 0, duration: OUT, ease: "power2.in" }, OUT_START);
                }

                tl.seek(0);
                applyTime(0);
                window.__timelines = window.__timelines || {};
                window.__timelines["variable-font-flex"] = tl;
              })();
            </script>
          </div>
        </template>
      </body>
    </html>
    ```
  </CatalogSlot>

  <CatalogSlot slot="install">
    <InstallCommand command="npx hyperframes add variable-font-flex" item="variable-font-flex" />

    That writes one file: `compositions/components/variable-font-flex.html`.
  </CatalogSlot>

  <CatalogSlot slot="docs">
    ## Paste it into your composition

    Open `compositions/components/variable-font-flex.html` and copy what is inside into your own composition.

    A component has no size or duration of its own. It takes both from the composition
    you paste it into.

    ## Variables

    Every one of these has a default, so the piece works untouched. Set the ones you
    want to change on the element:

    | Variable  | Default | Accepts                   | What it does                                                                   |
    | --------- | ------- | ------------------------- | ------------------------------------------------------------------------------ |
    | `text`    | `FLEX`  | string                    | The word whose variable-font axes flex.                                        |
    | `axis`    | `both`  | `weight`, `width`, `both` | Which variable-font axes animate: weight, width, or both.                      |
    | `stagger` | `0.06`  | number                    | Seconds between per-character flex starts, clamped 0 to 0.25.                  |
    | `accent`  | `green` | `green`, `blue`, `violet` | Word color: green rides --brand, blue rides --accent, violet rides --accent-2. |
    | `exit`    | `none`  | `none`, `fade`, `up`      | Optional departure. Default none: the carved word holds until the frame cuts.  |

    Set them with `data-variable-values` on the element that mounts it. These are the
    defaults, so this behaves exactly like the preview above until you change one:

    ```html wrap theme={null}
    <div
      data-composition-id="variable-font-flex"
      data-composition-src="compositions/components/variable-font-flex.html"
      data-variable-values='{"text":"FLEX","axis":"both","stagger":0.06,"accent":"green","exit":"none"}'
    ></div>
    ```

    Tagged `motion-primitive` `experiment` `type` `variable-font` `deterministic`.

    ## 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>