#fullscreenToggle .icon {
  position: absolute;
  right: 8px;
  top: 8px;
  z-index: 1;
  display: none;
  width: 40px;
  height: 40px;
}

body.fullscreen-enabled #fullscreenToggle .icon.on {
  display: none;
}
body.fullscreen-enabled #fullscreenToggle .icon.off {
  display: block;
}
body.fullscreen-enabled #fullscreenToggle.enabled .icon.on {
  display: block;
}
body.fullscreen-enabled #fullscreenToggle.enabled .icon.off {
  display: none;
}