*{box-sizing:border-box}
:root{
  --bg:#0c0d10; --panel:#121620; --line:#1e2a38;
  --ink:#d8e0ec; --muted:#8a90a8; --accent:#e8c464;
}
body{
  margin:0; min-height:100vh;
  background:radial-gradient(900px 500px at 30% 0%,rgba(232,196,100,.07),transparent 60%),linear-gradient(180deg,#0a0e14,var(--bg));
  color:var(--ink); font-family:ui-sans-system,system-ui,-apple-system,sans-serif;
  display:flex; flex-direction:column;
}
.back{margin:18px 24px 0;color:var(--muted);text-decoration:none;font-size:14px}
.back:hover{color:var(--ink)}
.head{max-width:960px;width:100%;margin:0 auto;padding:8px 24px 0}
.eyebrow{letter-spacing:.14em;text-transform:uppercase;font-size:12px;color:var(--accent);margin:0 0 6px}
h1{margin:0;font-size:42px;letter-spacing:-.02em;line-height:1}
.lede{color:var(--muted);max-width:56ch;line-height:1.5;margin:10px 0 0}
.layout{max-width:960px;width:100%;margin:0 auto;padding:20px 24px 28px;flex:1;display:grid;gap:16px}
.controls{
  background:var(--panel);border:1px solid var(--line);border-radius:14px;
  padding:12px;display:flex;gap:10px;align-items:center;flex-wrap:wrap;
  box-shadow:0 10px 30px rgba(0,0,0,.35);
}
.speed-btns{display:flex;gap:4px;flex-wrap:wrap}
button{
  border:1px solid var(--line);background:#151a25;color:var(--ink);
  padding:8px 12px;border-radius:8px;font:600 12px/1 system-ui;cursor:pointer;
}
button:hover{border-color:var(--accent)}
button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
button.active{background:var(--accent);color:#0d1018;border-color:transparent}
button:disabled{opacity:0.4;cursor:not-allowed}
button#snapshot{
  margin-left:auto;border:none;background:var(--accent);color:#0d1018;padding:8px 14px;border-radius:8px;font:600 12px/1 system-ui;
}
canvas{
  width:100%;height:460px;display:block;background:#0a0c10;
  border:1px solid var(--line);border-radius:14px;cursor:crosshair;touch-action:none;
}
.foot{
  display:flex;justify-content:space-between;gap:12px;
  padding:14px 24px 20px;color:var(--muted);font-size:13px;
  border-top:1px solid var(--line);max-width:960px;width:100%;margin:0 auto;
}
.foot a{color:var(--muted);text-decoration:none}
.foot a:hover{color:var(--ink)}
@media(max-width:700px){
  h1{font-size:32px}
  canvas{height:320px}
}
@media(prefers-reduced-motion:reduce){
  canvas{animation:none!important}
}