.game-container{display:flex;gap:24px;align-items:flex-start;-webkit-user-select:none;user-select:none}.board{display:grid;grid-template-columns:repeat(10,30px);grid-template-rows:repeat(20,30px);gap:1px;background:#0f0f23;border:3px solid #333;border-radius:4px;padding:2px}.cell{width:30px;height:30px;border-radius:2px;background:#16162a}.cell.I{background:#00f0f0;box-shadow:inset 0 0 8px #00f0f066}.cell.O{background:#f0f000;box-shadow:inset 0 0 8px #f0f00066}.cell.T{background:#a000f0;box-shadow:inset 0 0 8px #a000f066}.cell.S{background:#00f000;box-shadow:inset 0 0 8px #00f00066}.cell.Z{background:#f00000;box-shadow:inset 0 0 8px #f0000066}.cell.J{background:#0000f0;box-shadow:inset 0 0 8px #0000f066}.cell.L{background:#f0a000;box-shadow:inset 0 0 8px #f0a00066}.cell.ghost{opacity:.25}.sidebar{display:flex;flex-direction:column;gap:16px;min-width:140px}.panel{background:#0f0f23;border:2px solid #333;border-radius:4px;padding:12px}.panel h3{font-size:12px;text-transform:uppercase;letter-spacing:2px;color:#888;margin-bottom:8px}.panel .value{font-size:24px;font-weight:700;color:#fff;font-variant-numeric:tabular-nums}.next-piece{display:grid;grid-template-columns:repeat(4,22px);grid-template-rows:repeat(4,22px);gap:1px;margin-top:4px}.next-cell{width:22px;height:22px;border-radius:2px;background:transparent}.next-cell.I{background:#00f0f0}.next-cell.O{background:#f0f000}.next-cell.T{background:#a000f0}.next-cell.S{background:#00f000}.next-cell.Z{background:#f00000}.next-cell.J{background:#0000f0}.next-cell.L{background:#f0a000}.controls{font-size:11px;color:#666;line-height:1.8}.controls kbd{background:#222;border:1px solid #444;border-radius:3px;padding:1px 5px;font-family:inherit;color:#aaa}.overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:#000000b3;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:16px;border-radius:4px}.overlay h2{font-size:28px;color:#fff}.overlay button{padding:10px 28px;font-size:16px;border:2px solid #555;border-radius:4px;background:#222;color:#fff;cursor:pointer;transition:background .15s}.overlay button:hover{background:#333}.board-wrapper{position:relative}.clearing .cell.clearing-row{animation:flash .3s ease-in-out}@keyframes flash{0%,to{opacity:1}50%{opacity:0;background:#fff}}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{background:#1a1a2e;color:#e0e0e0;font-family:Segoe UI,system-ui,-apple-system,sans-serif;display:flex;justify-content:center;align-items:center;min-height:100vh;overflow:hidden}