html,
body {
    background-color: rgb(255, 255, 255);
    overflow: hidden;
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
}

canvas {
    width: 100%;
    height: 100%;
}

#gameContainer {
    position: relative;
    width: 100%;
    height: 100%;
}