.efsoverlay {
  height: 100%;
  width: 100%;
  position: fixed; 
  z-index: 99999; 
  left: 0;
  top: 0;
  background-color: rgb(0,0,0); 
  background-color: rgba(0,0,0, 0.5); 
  overflow-x: hidden; 
  transition: 0.5s; 
}

.efsoverlay-content {
	position: relative;
	top: 40%;
	width: 100%;
	text-align: center;
	margin-top: 30px;
	color: #ffffff;
	font-size: 3em;
}

.efsoverlay a {
  padding: 8px;
  text-decoration: none;
  font-size: 36px;
  color: #818181;
  display: block; 
  transition: 0.3s; 
}