html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: #000000;
}
canvas {
    display: block;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: min(100vw, 100vh);
    height: min(100vw, 100vh);
    image-rendering: pixelated;
}