.iframe-container {
    position: relative;
    width: 100%;
}

.iframe-container > iframe {
    display: block;
    width: 100%;
    position: relative;
    z-index: 1;
}

.iframe-container > .iframe-fullscreen-button {
    position: absolute;
    top: 10px;
    right: 10px;
    left: auto;

    z-index: 1000;

    margin: 0;
    padding: 8px 12px;

    border: 0;
    border-radius: 4px;

    background: rgba(0, 0, 0, 0.75);
    color: white;

    cursor: pointer;
}

.iframe-container > .iframe-fullscreen-button:hover,
.iframe-container > .iframe-fullscreen-button:focus {
    z-index: 1000;
}

.iframe-container:fullscreen {
    background: white;
}

.iframe-container:fullscreen > iframe {
    width: 100vw;
    height: 100vh !important;
    border: 0;
}

.iframe-container:fullscreen > .iframe-fullscreen-button {
    position: absolute;
    top: 10px;
    right: 10px;
    left: auto;
    z-index: 1000;
}