body, html {
    margin: 0;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}
body {
    display: flex;
    background-color: gray;
    align-items: center;
    justify-content: center;
}
#canvas {
    /* width: 100%; */
    /* height: 100%; */
    max-height: 100vh;
    max-width: 100vw;
    position: absolute;
    /* left: 50%; */
    /* transform: translateX(-50%); */
    margin: 0 auto;
    background-color: black;
}