Success Check

<!--
  Success Check - transitions.dev-inspired primitive for HyperFrames.

  Paste the markup, CSS and script into a composition. Use the timeline
  integration note at the bottom as the starting point for deterministic GSAP
  animation.

  Variables. The script reads each one, falls back to the declared default on
  anything missing or unrecognised, and writes the result as a custom property
  the CSS below consumes. The timeline recipe at the bottom is untouched by
  them: it keeps popping the mark in and drawing the tick, and these decide how
  big it is, what colour it wears and how far the pop swings.

    - tint (green | blue | violet | amber, default green): the colour pair, a
      pale halo behind a saturated mark. green and amber are literal state
      colours and stay legible whatever the surrounding theme tokens hold; blue
      and violet name no state, so their mark rides the composition's own accent
      and accent-2 tokens over a neutral halo and falls back to ink when the
      composition declares none.
    - size (small | standard | large, default standard): diameter of the halo
      and of the mark inside it, 60px, 82px or 110px. The stroke is in viewBox
      units, so it thickens with the mark instead of staying pinned.
    - ring (subtle | standard | bold, default standard): opacity of the circle
      the tick sits in, 0.12, 0.28 or 0.6.
    - spin (subtle | standard | bold, default standard): multiplies the rotation
      the timeline drives, so the mark swings a quarter as far or twice as far
      into place. It scales what is already there rather than replacing it, so
      it still lands square at the end of the pop, and at rest, with no rotation
      driven, all three settle identically.

  On every default the result is identical to the original: an 82px pale green
  halo, a green tick, a 0.28 ring, and the authored -18deg pop.
-->

<div
  class="hf-transition-success-check"
  aria-label="Success"
  data-composition-variables='[
    { "id": "tint", "type": "enum", "role": "style", "label": "Tint", "description": "Colour pair, a pale halo behind a saturated mark. green and amber are literal state colours; blue and violet ride the composition theme tokens.", "default": "green", "options": [{ "value": "green", "label": "Green" }, { "value": "blue", "label": "Blue" }, { "value": "violet", "label": "Violet" }, { "value": "amber", "label": "Amber" }] },
    { "id": "size", "type": "enum", "role": "layout", "label": "Size", "description": "Diameter of the halo and of the mark inside it.", "default": "standard", "options": [{ "value": "small", "label": "Small" }, { "value": "standard", "label": "Standard" }, { "value": "large", "label": "Large" }] },
    { "id": "ring", "type": "enum", "role": "style", "label": "Ring", "description": "Opacity of the circle the tick sits in.", "default": "standard", "options": [{ "value": "subtle", "label": "Subtle" }, { "value": "standard", "label": "Standard" }, { "value": "bold", "label": "Bold" }] },
    { "id": "spin", "type": "enum", "role": "motion", "label": "Spin", "description": "Multiplies the rotation the timeline drives, so the mark swings less or more into place.", "default": "standard", "options": [{ "value": "subtle", "label": "Subtle" }, { "value": "standard", "label": "Standard" }, { "value": "bold", "label": "Bold" }] }
  ]'
>
  <svg viewBox="0 0 64 64">
    <circle cx="32" cy="32" r="27" />
    <path d="M20 33.5l8 8L45 23" />
  </svg>
</div>

<style>
  .hf-transition-success-check {
    display: grid;
    place-items: center;
    width: var(--hf-check-size, 82px);
    height: var(--hf-check-size, 82px);
    border-radius: 999px;
    background: var(--hf-check-halo, #dcfce7);
    color: var(--hf-check-ink, #16a34a);
  }
  .hf-transition-success-check svg {
    width: var(--hf-check-mark-size, 64px);
    height: var(--hf-check-mark-size, 64px);
    fill: none;
    stroke: currentColor;
    stroke-width: 5;
    stroke-linecap: round;
    stroke-linejoin: round;
    filter: blur(var(--hf-check-blur, 0px));
    transform: rotate(calc(var(--hf-check-rotate, 0deg) * var(--hf-check-spin, 1)))
      scale(var(--hf-check-scale, 1));
  }
  .hf-transition-success-check circle {
    opacity: var(--hf-check-ring-opacity, 0.28);
  }
  .hf-transition-success-check path {
    stroke-dasharray: 36;
    stroke-dashoffset: var(--hf-check-dash, 0);
  }
</style>

<script>
  (function () {
    "use strict";

    var vars =
      window.__hyperframes && window.__hyperframes.getVariables
        ? window.__hyperframes.getVariables()
        : {};

    // Unrecognised overrides return to their declared defaults.
    // The mark is the whole composition and its colour is its meaning, so this
    // is the one place an accent belongs. green and amber are the literal
    // success and caution conventions; blue and violet named no state, so they
    // ride the composition's own tokens over a neutral halo and fall back to
    // ink when the composition declares none.
    var tints = {
      green: { halo: "#dcfce7", ink: "#16a34a" },
      blue: { halo: "#f4f4f5", ink: "var(--accent, #18181b)" },
      violet: { halo: "#f4f4f5", ink: "var(--accent-2, #18181b)" },
      amber: { halo: "#fef3c7", ink: "#d97706" },
    };
    var sizes = {
      small: { box: "60px", mark: "47px" },
      standard: { box: "82px", mark: "64px" },
      large: { box: "110px", mark: "86px" },
    };
    var rings = { subtle: "0.12", standard: "0.28", bold: "0.6" };
    var spins = { subtle: "0.4", standard: "1", bold: "2" };

    function pick(table, value, fallback) {
      return Object.prototype.hasOwnProperty.call(table, value) ? value : fallback;
    }

    var tint = tints[pick(tints, vars.tint, "green")];
    var size = sizes[pick(sizes, vars.size, "standard")];
    var ring = rings[pick(rings, vars.ring, "standard")];
    var spin = spins[pick(spins, vars.spin, "standard")];

    var roots = document.querySelectorAll(".hf-transition-success-check");
    for (var i = 0; i < roots.length; i += 1) {
      roots[i].style.setProperty("--hf-check-halo", tint.halo);
      roots[i].style.setProperty("--hf-check-ink", tint.ink);
      roots[i].style.setProperty("--hf-check-size", size.box);
      roots[i].style.setProperty("--hf-check-mark-size", size.mark);
      roots[i].style.setProperty("--hf-check-ring-opacity", ring);
      roots[i].style.setProperty("--hf-check-spin", spin);
    }
  })();
</script>

<!--
  Timeline integration:
  tl.fromTo('.hf-transition-success-check svg', { opacity: 0, '--hf-check-scale': 0.72, '--hf-check-rotate': '-18deg', '--hf-check-blur': '7px' }, { opacity: 1, '--hf-check-scale': 1, '--hf-check-rotate': '0deg', '--hf-check-blur': '0px', duration: 0.34, ease: 'back.out(1.8)' }, startTime); tl.fromTo('.hf-transition-success-check path', { '--hf-check-dash': 36 }, { '--hf-check-dash': 0, duration: 0.42, ease: 'power2.out' }, startTime + 0.12);
-->