szurubooru/public_html/media/css/tabs.css

.tabs ul {
	list-style-type: none;
	margin: -4px 0 1em 0;
	padding: 0;
	border-bottom: 1px solid #ccc;
}
.tabs li {
	display: inline-block;
}

.tabs li a {
	display: inline-block;
	padding: 0.5em 1em;
	margin: 5px 0 -1px 0;
	vertical-align: middle;
	border: 1px none;
	border-bottom: 1px solid #ccc;
	color: silver;
}
.tabs li.selected a {
	border: 1px solid #ccc;
	border-bottom: none;
	color: inherit;
	background: white;
}

.tabs li a:focus {
	color: firebrick;
}