.iframe-container{
    position:relative;
}
body.iframe-fullscreen{
    overflow:hidden;
}

body.iframe-fullscreen .iframe-container{
    position:fixed;
    z-index:99999999;
    top:0;
    left:0;
    width:100% !important;
    height:100% !important;
    background:rgba(0,0,0,0.75);
    padding: 30px;
    box-sizing: border-box;
}

body.iframe-fullscreen .iframe-container > iframe#iframe {
    background: #fff;
}

.iframe-container .iframe-fullscreen-control {
    position: absolute;
    top: auto;
    left: auto;
    right: 25px;
    bottom: 10px;
}
body.iframe-fullscreen .iframe-container .iframe-fullscreen-control {
    right: 55px;
    bottom: 40px;
}

.iframe-container .iframe-fullscreen-control > a {
    display: block;
    background-position: 0 -450px;
}
body.iframe-fullscreen .iframe-container .iframe-fullscreen-control > a {
    background-position: -40px -450px;
}
.iframe-container .iframe-fullscreen-control > a {
    display: block;
    width: 40px;
    height: 40px;
    text-decoration: none;
    background-color: #000;
    background-image: url(https://content.cdntwrk.com/img/hubs/sprite-1x.png);
    border-radius: 8px;
    transition: opacity .15s ease-in-out;
    opacity: .25;
}
.iframe-container .iframe-fullscreen-control > a:hover {
    opacity: .75;
}