html {
    height: 100%;
    margin: 0;
    padding: 0;
}
body {
    margin: 0;
    padding: 0;
    min-height: 100%;
    width: 100%;
}
#bg-canvas, #bg-fallback {
    position: fixed;
    top: 0;
    left: 0;
    margin: 0;
    padding: 0;
    z-index: -1;
    background-color: black;
}
#bg-fallback {
    width: 100%;
    height: 100vh;
}