html, body {
    width: 100%;
    height: 100%;
    margin: 0;
    overflow: hidden;
    background-color: #000000;
    touch-action: none;
    -ms-touch-action: none;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    font-family: Arial;
}