html,body{margin:0;overflow:hidden;background:#000;color:#dfe8ff;font-family:ui-monospace,Consolas,monospace}.game-canvas{display:block;cursor:crosshair;image-rendering:pixelated}.hud{position:fixed;top:12px;left:12px;font-size:14px;line-height:1.5;pointer-events:none;text-shadow:0 1px 2px #000}.hud .hint{margin-top:6px;opacity:.6;font-size:12px}.hud .warn{margin-top:8px;color:#ff9ad5;font-size:12px}.panel{position:fixed;padding:20px 28px;background:#080a16d9;border:1px solid #2c5a9e;text-align:center}.center{top:50%;left:50%;transform:translate(-50%,-50%)}.panel h1{margin:0 0 12px;font-size:22px}.panel button{margin-top:8px;padding:6px 14px;font:inherit;color:inherit;background:#2c5a9e;border:none;cursor:pointer}