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;
}

canvas.landscape {
    max-height: 100vh;
    max-width: 100vh;
}

canvas.portrait {
    max-height: 100vw;
    max-width: 100vw;
}

#bg-img-container {
    background-size: cover;
    left: 0;
    position: fixed;
    top: 0vh;
    z-index: -1;
    height: 100vh;
    width: 100vw;
}