html, body {
    margin: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: #000;
}

#frameWrap {
    position: absolute;
    inset: 0;
}

.contentIframeClass {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
    display: block;
}

.hiddenFrame {
    visibility: hidden;
    pointer-events: none;
}