html, body {
margin: 0;
padding: 0;
width: 100%;
height: 100%;
overflow: hidden;
background: #000;
}

body {
display: flex;
align-items: center;
justify-content: center;
touch-action: none;
-webkit-tap-highlight-color: transparent;
-webkit-user-select: none;
user-select: none;
}

#canvas {
display: block;
position: fixed;
left: 50%;
top: 50%;
transform: translate(-50%, -50%);
transform-origin: center center;
background: #000;
}