.cell{overflow:visible;position:relative;width:var(--cell-size);height:var(--cell-size);background:#222;border-radius:6px;transition:background .2s ease}.cell.player{background:#b6ff44}.cell.enemy{background:#ff9c7e}.cell.signal{background:#0df}.cell.signal:after{content:"";position:absolute;top:0;left:0;width:var(--cell-size);height:var(--cell-size);pointer-events:none;outline:1px inset #b6ff44;border-radius:6px;will-change:transform,opacity;animation:pulse 1s cubic-bezier(.4,0,.2,1) infinite}.board-wrapper{position:relative}.board-wrapper .board{display:grid;grid-template-columns:repeat(var(--grid-size, 10),var(--cell-size));margin:20px auto;justify-content:center;gap:var(--gap-size);overflow:hidden;opacity:var(--opacity);transition:all .5s ease-out}.board-wrapper .game-over{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.hud{display:grid;justify-content:space-between;max-width:600px;margin:16px auto 24px;gap:16px;padding:16px;border-radius:4px;border:1px solid #333;text-align:left;grid-template-columns:repeat(1,1fr)}@media(min-width:561px){.hud{grid-template-columns:repeat(2,1fr)}}.hud span{display:inline-block;padding:0 8px}:root{--cell-size: 44px;--gap-size: 6px;--opacity: 1}button{font-family:"Press Start 2P",system-ui,sans-serif;font-size:8px;font-weight:400;font-style:normal}button.btn{appearance:none;display:inline-block;padding:9px 10px 7px;text-transform:uppercase;border-radius:4px;background:#222;color:#f4f4f6;border:1px solid #333;cursor:pointer;transition:border-color .15s linear}button.btn:hover{border-color:#f4f4f6}button.inline{opacity:.6;appearance:none;text-decoration:underline;background:transparent;border:none;color:#f4f4f6;cursor:pointer}input{background:#333;color:#f4f4f6;border:1px solid #333;padding:4px;margin-right:4px;max-width:125px}body{line-height:1.2;font-family:"Press Start 2P",system-ui,sans-serif;font-size:10px;font-weight:400;font-style:normal}h1{margin-bottom:24px}p{margin-bottom:16px}@keyframes pulse{0%{transform:scale(1);opacity:.75}to{transform:scale(1.2);opacity:.1}}*{box-sizing:border-box}.app{text-align:center;max-width:600px}body{background:#111;color:#f4f4f6;display:flex;justify-content:center;padding:40px;margin:0}