html,body{height:100%;width:100%;margin:0;background:#0d0f1a;overflow:hidden}#game{image-rendering:pixelated;height:100%;width:100%;margin:0;overflow:hidden}canvas{display:block;margin:0 auto;outline:none}.btn{font-family:monospace;padding:8px 12px;border:1px solid #fff;background:transparent;color:#fff;cursor:pointer}.panel{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center}