#lightbox {
	display: block;
	position: fixed;
	background-color: rgba(0, 0, 0, .75);
	background-repeat: no-repeat;
	background-position: center;
	width: 100%;
	height: 100%;
	top: 0;
	left: 0;
	z-index: 3;
	opacity: 0;
	transition: opacity .25s;
}

#lightbox.open {
	opacity: 1;
}