#backdrop {
	background: #000;
	z-index: 1;
}

#backdrop, #backdrop > span {
	height: 100%;
	left: 0px;
	position: fixed;
	top: 0px;
	width: 100%;
}

#backdrop > span {
	background-position: center;
	background-size: cover;
	display: block;
	opacity: 1;
}

#backdrop > span.previous {
	opacity: 1;
	z-index: 1;
}

#backdrop > span.current {
	animation: fadein 5000ms linear both;
	z-index: 2;
}

@keyframes fadein {
	0% {
		opacity: 0;
	}
	30% {
		opacity: 1;
	}
	100% {
		opacity: 1;
	}
}