* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

#container {
    position: absolute;
    top: 0;
    left: 0;
    background: #000;
    width: 100%;
    height: 100%;
}

#canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}