Shimmer Sweep

<!--
  Shimmer Sweep — animated light pass across text or elements.

  Usage: place this snippet AFTER your .shimmer-sweep-target elements.
  Wrap your text element with class="shimmer-sweep-target" and
  paste this snippet into your composition. The GSAP timeline drives
  the sweep position for deterministic frame-by-frame rendering.

  Customize:
  - --shimmer-color: highlight color (default rgba(255,255,255,0.6))
  - --shimmer-width: highlight band width as % (default 20%)
  - --shimmer-angle: sweep angle (default 120deg)
  - Timeline duration/ease: adjust in the script below
-->

<style>
  .shimmer-sweep-target {
    position: relative;
    display: inline-block;
  }

  .shimmer-sweep-target .shimmer-mask {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    background: linear-gradient(
      var(--shimmer-angle, 120deg),
      transparent 0%,
      transparent calc(var(--shimmer-pos, -20%) - var(--shimmer-width, 20%) / 2),
      var(--shimmer-color, rgba(255, 255, 255, 0.6)) var(--shimmer-pos, -20%),
      transparent calc(var(--shimmer-pos, -20%) + var(--shimmer-width, 20%) / 2),
      transparent 100%
    );
    mix-blend-mode: overlay;
  }
</style>

<script>
  (function () {
    // Auto-inject .shimmer-mask into every .shimmer-sweep-target
    document.querySelectorAll(".shimmer-sweep-target").forEach((el) => {
      if (!el.querySelector(".shimmer-mask")) {
        const mask = document.createElement("div");
        mask.className = "shimmer-mask";
        el.appendChild(mask);
      }
    });
  })();
</script>

<!--
  Timeline integration example (add to your composition's GSAP timeline):

  // Single sweep from left to right
  tl.fromTo(".shimmer-sweep-target", {
    "--shimmer-pos": "-20%",
  }, {
    "--shimmer-pos": "120%",
    duration: 1.2,
    ease: "power2.inOut",
    stagger: 0.15,
  }, startTime);
-->