html, body {
    padding:0;
    margin:0;
    background:#221727;
    color: #fff;
    width:100%;
    height: 100%;
}
.wrapper {
    width:100%;
    height: 100%;
    display:flex;
    align-items: center;
    justify-content: center;
}
canvas {
    max-width: 100%;
}