iframe {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

#fullScreenButton {
    position: fixed;
    bottom: 5px;
    left: 5px;
    z-index: 12;
    width: 30px;
    border: none;
    outline: none;
    background: #525F7F;
}

#fullScreenButton:focus-visible {
    border: none;
    outline: none;
}

#fullScreenButton img {
    width: 100%;
    display: block;
}