body {
	background-color: #131313;
}

.background-wrapper {
	width: 100%;
	height: 100%;
	position: fixed;
}

.background {
	position: fixed;
	margin: auto;
	left: 0;
	right: 0;
	top: 0;
	bottom: 0;
}

.passive {
	opacity: 0;
	-webkit-transition: opacity 250ms ease-in;
	-o-transition: opacity 250ms ease-in;
	transition: opacity 250ms ease-in;
}

.passive:hover {
	opacity: 1;
}