body {
    margin: 0;
    overflow: hidden;
    background-color: #111;
}

canvas {
    display: block;
    width: 100vw;
    height: 100vh;
    position: absolute;
    top: 0;
    left: 0;
}

.controls {
    position: absolute;
    bottom: 2%;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
}