body {
    align-items: center;
    background: #222;
    display: flex;
    height: 100vh;
    justify-content: center;
    margin: 0;
    width: 100vw;
}

main {
    align-items: center;
    display: flex;
    height: 100vh;
    justify-content: center;
    width: 100vw;
}

canvas {
    max-height: 100vh;
    opacity: 1;
    max-width: 100vw;
}