Silk — spline cursor

<!-- Original layout, SVG/CSS artwork and JavaScript © 2026 XXC Templates. MIT License.
Illustrative sample content and data; no real accounts, purchases or bookings. -->
<main>
  <header class="intro">
    <div>
      <div class="kicker">INTERACTIVE / CREATIVE CODING</div>
      <h1>Silk — spline cursor</h1>
      <p>
        Layered Bézier ribbons drift toward your cursor, creating an elegant study in light, tension
        and movement.
      </p>
    </div>
  </header>
  <div class="stage">
    <canvas
      tabindex="0"
      aria-label="Silk — spline cursor. Move your pointer or use arrow keys to interact."
    ></canvas
    ><span class="canvas-label">MOVE YOUR POINTER · ARROW KEYS ALSO WORK</span>
  </div>
  <div class="toolbar">
    <button id="effect">Change atmosphere ↗</button><button id="pause">Pause motion</button>
  </div>
  <output id="status" class="status" aria-live="polite"></output>
</main>

:root {
  --bg: #191429;
  --panel: #28203e;
  --text: #f0e7ff;
  --muted: #b6a6cf;
  --line: #483a62;
  --accent: #c5a4ff;
}
/* Original XXC Templates Studio collection. MIT; sample data only. */
* {
  box-sizing: border-box;
}
html {
  color-scheme: dark;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font:
    14px/1.6 system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  padding: clamp(18px, 4vw, 40px);
  min-height: 100vh;
}
h1,
h2,
h3,
p {
  margin: 0;
}
h1 {
  font-size: clamp(27px, 4.8vw, 46px);
  line-height: 1.07;
  letter-spacing: -0.055em;
  font-weight: 650;
}
h2 {
  font-size: 22px;
  letter-spacing: -0.025em;
  line-height: 1.2;
}
h3 {
  font-size: 15px;
}
p {
  color: var(--muted);
}
button,
input,
select {
  font: inherit;
}
button,
a,
input,
select,
summary {
  touch-action: manipulation;
}
button {
  cursor: pointer;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 9px 14px;
  font-size: 12px;
}
button:hover {
  border-color: var(--accent);
}
button[aria-pressed="true"],
button.active {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
button:disabled {
  opacity: 0.5;
  cursor: default;
}
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}
a {
  color: inherit;
  text-underline-offset: 4px;
}
input,
select {
  min-width: 0;
  max-width: 100%;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px;
}
input[type="range"] {
  accent-color: var(--accent);
  padding: 0;
}
input[type="checkbox"] {
  accent-color: var(--accent);
}
label {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 12px;
  color: var(--muted);
}
svg {
  max-width: 100%;
  display: block;
}
img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
main {
  max-width: 1120px;
  margin: auto;
  min-width: 0;
}
.kicker {
  text-transform: uppercase;
  letter-spacing: 0.17em;
  font:
    10px/1.6 ui-monospace,
    monospace;
  color: var(--accent);
}
.intro {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  margin-bottom: 25px;
}
.intro h1 {
  margin: 8px 0 10px;
}
.intro p {
  max-width: 470px;
  font-size: 13px;
}
.badge {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 50px;
  padding: 5px 10px;
  font:
    10px ui-monospace,
    monospace;
  color: var(--muted);
}
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px;
  min-width: 0;
}
.toolbar {
  display: flex;
  gap: 9px;
  flex-wrap: wrap;
  align-items: center;
  margin: 16px 0;
}
.primary {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 15px;
}
.muted {
  color: var(--muted);
}
.metric {
  font-size: 36px;
  letter-spacing: -0.05em;
  font-weight: 600;
}
.mono {
  font-family: ui-monospace, monospace;
}
.rule {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 20px 0;
}
footer,
.footnote {
  font-size: 10px;
  color: var(--muted);
  margin-top: 18px;
}
.status {
  display: block;
  min-height: 20px;
  margin-top: 10px;
  color: var(--accent);
  font-size: 12px;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}
[hidden] {
  display: none !important;
}
.data-table {
  margin-top: 16px;
  font-size: 11px;
  color: var(--muted);
}
.data-table summary {
  cursor: pointer;
}
.table-scroll {
  overflow: auto;
  max-width: 100%;
}
table {
  border-collapse: collapse;
  width: 100%;
  font-size: 11px;
}
th,
td {
  text-align: left;
  border-bottom: 1px solid var(--line);
  padding: 9px;
  white-space: nowrap;
}
caption {
  text-align: left;
  color: var(--muted);
  padding: 8px 0;
}
.legend {
  display: flex;
  gap: 17px;
  flex-wrap: wrap;
  font-size: 11px;
  color: var(--muted);
}
.legend i {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c);
  margin-right: 6px;
}
dialog {
  max-width: calc(100vw - 36px);
  width: 460px;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 25px;
}
dialog::backdrop {
  background: #000a;
}
dialog p {
  margin: 12px 0;
}
.media-credit {
  font-size: 9px;
  margin-top: 16px;
  color: var(--muted);
}
.stage {
  position: relative;
  min-height: 290px;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
}
@media (max-width: 520px) {
  .intro {
    align-items: flex-start;
    flex-direction: column;
  }
  .grid {
    grid-template-columns: 1fr;
  }
  .panel {
    padding: 17px;
  }
  .toolbar label {
    flex-wrap: wrap;
  }
  .stage {
    min-height: 270px;
  }
  h1 {
    font-size: 32px;
  }
  .intro p {
    font-size: 12px;
  }
}
@media (prefers-reduced-motion: reduce) {
  *,
  *:before,
  *:after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}
html {
  color-scheme: dark;
}
.stage {
  height: 330px;
  background: #080f1c;
}
.stage canvas {
  width: 100%;
  height: 100%;
  display: block;
  touch-action: pan-y;
}
.canvas-label {
  position: absolute;
  left: 24px;
  bottom: 22px;
  pointer-events: none;
  color: #c0d7eb;
  font:
    10px ui-monospace,
    monospace;
  letter-spacing: 2px;
}
.stage:after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  box-shadow: inset 0 0 80px #0003;
}
.intro h1 {
  font-weight: 500;
}
.toolbar {
  justify-content: space-between;
}
.stage canvas:focus-visible {
  outline-offset: -5px;
}

(() => {
  "use strict";
  const $ = (s) => document.querySelector(s),
    $$ = (s) => [...document.querySelectorAll(s)],
    status = (t) => {
      const el = $("#status");
      if (el) el.textContent = t;
    },
    clamp = (n, a, b) => Math.max(a, Math.min(b, n));
  const reduced = matchMedia("(prefers-reduced-motion: reduce)").matches;
  const ns = "http://www.w3.org/2000/svg";
  function svg(tag, attrs = {}, text) {
    const el = document.createElementNS(ns, tag);
    for (const [k, v] of Object.entries(attrs)) el.setAttribute(k, String(v));
    if (text !== undefined) el.textContent = text;
    return el;
  }
  function table(headers, rows) {
    const t = $("#data-table");
    if (!t) return;
    t.replaceChildren();
    const caption = document.createElement("caption");
    caption.textContent = "Illustrative sample data";
    t.append(caption);
    const head = t.createTHead().insertRow();
    headers.forEach((v) => {
      const th = document.createElement("th");
      th.scope = "col";
      th.textContent = v;
      head.append(th);
    });
    const body = t.createTBody();
    rows.forEach((row) => {
      const r = body.insertRow();
      row.forEach((v) => (r.insertCell().textContent = String(v)));
    });
  }
  function selectButtons(selector, callback) {
    $$(selector).forEach((b) =>
      b.addEventListener("click", () => {
        $$(selector).forEach((x) => x.setAttribute("aria-pressed", String(x === b)));
        callback(b);
      }),
    );
  }

  function draw() {
    ctx.fillStyle = "#111222";
    ctx.fillRect(0, 0, w, h);
    for (let i = 0; i < 28; i++) {
      const y = h * 0.5 + Math.sin(t * 0.45 + i * 0.16) * 42,
        px = pointer.x * w,
        py = pointer.y * h;
      ctx.strokeStyle =
        "hsla(" + (variant ? 27 + i : 220 + i * 3) + ",80%,72%," + (0.13 + i * 0.009) + ")";
      ctx.lineWidth = 1;
      ctx.beginPath();
      ctx.moveTo(-20, y + i * 3 - 42);
      ctx.bezierCurveTo(
        w * 0.25,
        py - 160 + i * 7,
        px,
        py + 120 - i * 4,
        w + 20,
        h * 0.5 + Math.cos(i * 0.11 + t) * 50,
      );
      ctx.stroke();
    }
    ctx.fillStyle = "#f6ecff";
    ctx.beginPath();
    ctx.arc(pointer.x * w, pointer.y * h, 3, 0, Math.PI * 2);
    ctx.fill();
  }
  const canvas = $("canvas"),
    ctx = canvas.getContext("2d");
  let w = 1,
    h = 1,
    t = 0,
    paused = reduced,
    variant = 0,
    raf = 0;
  const pointer = { x: 0.5, y: 0.5, active: false };
  let seed = 71;
  const random = () => ((seed = (seed * 16807) % 2147483647) - 1) / 2147483646;
  const points = Array.from({ length: 85 }, () => ({
    x: random(),
    y: random(),
    r: random(),
    phase: random() * 6.28,
  }));
  function size() {
    const r = canvas.getBoundingClientRect();
    w = r.width;
    h = r.height;
    const d = Math.min(devicePixelRatio || 1, 2);
    canvas.width = Math.round(w * d);
    canvas.height = Math.round(h * d);
    ctx.setTransform(d, 0, 0, d, 0, 0);
    draw();
  }
  canvas.addEventListener("pointermove", (e) => {
    const r = canvas.getBoundingClientRect();
    pointer.x = clamp((e.clientX - r.left) / w, 0, 1);
    pointer.y = clamp((e.clientY - r.top) / h, 0, 1);
    pointer.active = true;
    if (paused) draw();
  });
  canvas.addEventListener("pointerleave", () => (pointer.active = false));
  canvas.addEventListener("keydown", (e) => {
    const d = {
      ArrowLeft: [-0.04, 0],
      ArrowRight: [0.04, 0],
      ArrowUp: [0, -0.04],
      ArrowDown: [0, 0.04],
    }[e.key];
    if (d) {
      e.preventDefault();
      pointer.x = clamp(pointer.x + d[0], 0, 1);
      pointer.y = clamp(pointer.y + d[1], 0, 1);
      pointer.active = true;
      draw();
    }
  });
  $("#effect").addEventListener("click", () => {
    variant = 1 - variant;
    draw();
    status(variant ? "Alternate effect enabled." : "Original effect restored.");
  });
  $("#pause").textContent = paused ? "Play motion" : "Pause motion";
  $("#pause").addEventListener("click", () => {
    paused = !paused;
    $("#pause").textContent = paused ? "Play motion" : "Pause motion";
    if (!paused) loop();
    else cancelAnimationFrame(raf);
    status(paused ? "Motion paused." : "Motion playing.");
  });
  matchMedia("(prefers-reduced-motion: reduce)").addEventListener("change", (e) => {
    if (e.matches) {
      paused = true;
      cancelAnimationFrame(raf);
      $("#pause").textContent = "Play motion";
      draw();
    }
  });
  function loop() {
    if (paused) return;
    t += 0.016;
    if (!document.hidden) draw();
    raf = requestAnimationFrame(loop);
  }
  new ResizeObserver(size).observe(canvas);
  size();
  if (!paused) loop();
})();