.overlay {
	height: 100%;
	width: 100%;
	display: none;
	position: fixed;
	z-index: 1;
	top: 0;
	left: 0;
	background-color: rgb(0,0,0);
	background-color: rgba(0,0,0, 0.9);
}

.overlay-content {
	overflow-y: auto;
	position: relative;
	top: 5%;
	width: 100%;
	height: 99%;
	text-align: center;
}

.overlay a {
	padding: 8px;
	text-decoration: none;
	font-size: 69px;
	color: #818181;
	display: block;
	transition: 0.3s;
}

.overlay a:hover, .overlay a:focus {
	color: #f1f1f1;
}

.overlay .closebtn {
	position: absolute;
	top: 20px;
	right: 45px;
	font-size: 60px;
	z-index: 2;
}

@media screen and (max-height: 450px) {
  .overlay a {font-size: 20px}
  .overlay .closebtn {
	font-size: 40px;
	top: 15px;
	right: 35px;
  }
}