INPUT.iframe-trigger,
INPUT.iframe-trigger:checked + DIV.iframe-info
{
    DISPLAY: none;
}

DIV.iframe-info
{
    MAX-HEIGHT: calc(100vh - 35 * var(--cms-factor));
    OVERFLOW-X: clip;
    OVERFLOW-Y: auto;
}

DIV.iframe-info > LABEL
{
    LEFT: 50%;
    MARGIN: 0;
    TRANSFORM: translateX(-50%);
}

DIV.iframe > IFRAME
{
    DISPLAY: none;
    HEIGHT: calc(100vh - 35 * var(--cms-factor));
    WIDTH: 100%;
}

DIV.iframe > IFRAME:first-child,
INPUT.iframe-trigger:checked + DIV.iframe-info + IFRAME
{
    DISPLAY: block;
}