.back {
	display: block;
	margin-left: auto;
	margin-right: auto;
}

.back > * {
}

.back > img {
	width: 4rem;
	height: 4rem;
	margin: 1rem;
	filter: drop-shadow(.125rem .125rem 0 black);
	position: relative;
	bottom: .125rem;
	right: .125rem;
	vertical-align: middle;
	display: inline;
}

.back > img:hover {
	filter: drop-shadow(.20rem .20rem 0 black);
	bottom: .20rem;
	right: .20rem;
}