:root{color-scheme:dark;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;min-height:100vh;background:radial-gradient(1100px 700px at 12% -10%,rgba(0,210,255,.14),transparent 60%),radial-gradient(900px 600px at 95% 0%,rgba(155,93,229,.14),transparent 55%),#0b0d16;background-attachment:fixed}.board{position:relative;display:grid;grid-template-columns:repeat(var(--cols),1fr);gap:1px;padding:1px;background:#05060b;border:1px solid rgba(255,255,255,.12);border-radius:8px;overflow:hidden;aspect-ratio:var(--cols) / var(--rows);touch-action:manipulation}.board__cell{aspect-ratio:1;border-radius:2px;background:#0e1018}.board__cell--clearing{animation:cell-clear .16s ease-out forwards}@keyframes cell-clear{0%{transform:scale(1);filter:brightness(1)}50%{transform:scale(1.12);filter:brightness(2.4)}to{transform:scale(.2);filter:brightness(2.4);opacity:.2}}.board__particle{position:absolute;width:2.2%;aspect-ratio:1;border-radius:2px;transform:translate(-50%,-50%);pointer-events:none}.board__overlay{position:absolute;inset:0;display:flex;flex-direction:column;gap:4px;align-items:center;justify-content:center;background:#05060bb8;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);text-align:center}@media(prefers-reduced-motion:reduce){.board__cell--clearing{animation-duration:1ms}}