* {
    padding: 0;
    margin: 0;
}

html, body {
    overflow: hidden;
    touch-action: none;
    -ms-touch-action: none;
}

div#viewport {
    position: fixed;
    width: 100%;
    height: 100%;
}

div#viewport>canvas {
    display: block;
    width: 100%;
    height: 100%;
    border: none;
    touch-action: none;
    -ms-touch-action: none;
    touch-action-delay: none;
}