body {
    background: black none;
}

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

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