html {
    height: 100% !important;
    background: #000;
}
#js-od-hidden-for-mobile {
    position: fixed;
    background: #000;
    z-index: 99999;
    width: 100%;
    height: 100%;
    left: 0;
    right: 0;
    bottom: 0;
    top: 0;
    color: #fff;
    padding: 20px 40px;
}