body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: white;
    margin: 0;
    padding: 0;
    -webkit-user-select: none;
}

canvas {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    height: auto;
    width: auto;
    max-width: 100%;
    max-height: 100%;
    -webkit-user-select: none;
}