#board {grid-template-columns:repeat(4,minmax(44px,1fr));grid-auto-rows:1fr;aspect-ratio:1;gap:4px;}
.light-tile {height:100%;min-width:44px;min-height:44px;padding:0;border:2px solid var(--line);border-radius:10px;font-size:2rem;line-height:1;touch-action:manipulation;}
.light-tile.on {background:#facc15;color:#422006;border-color:#b45309;}
.light-tile.off {background:var(--surface);color:var(--muted);}
.light-tile.selected {outline:3px solid #2563eb;outline-offset:-5px;}
.light-tile:disabled {opacity:1;}
.play-actions {grid-template-columns:repeat(3,minmax(0,1fr));}.play-actions button {min-height:44px;}