body {
	max-width: 800px;
	margin: auto;
	background: grey;
	border: 30%;
}

img {
	max-width: 100%;
}

figure {
	text-align: center;
}

[data-tooltip]:hover::after {
	display: block;
	position: absolute;
	content: attr(data-tooltip);
	border: 1px solid black;
	background: #eee;
	padding: .25em;
  }