#header {
  position: fixed !important;
  display: block;
  opacity: 0;
  line-height: 0;
  z-index: 1;
  pointer-events: none;
  width: 100%;
}


#header:hover {
  position: initial !important;
  display: initial;
  opacity: 1;
  line-height: initial;
  z-index: initial;
  pointer-events: initial;
  width: 100%;
  height: initial;
}