* {
    margin: 0;
    padding: 0;
}

html {
    height: 100%;
}

body {
    background: #222;
    /*border: 10px solid orange;*/
    height: 100%;
}

canvas {
    position: absolute;
    left: 0;
    top: 0;
    box-shadow: inset 0 0 100px #4162a9;
    transform: translateZ(0);
}