html, body {
    width:  100%;
    height: 100%;
    margin: 0px;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    overflow: hidden;
}
#top-left {
    position: absolute;
    left: 10px;
    top: 10px;
}