Module:Authority control/styles.css

@media screen and (max-width: 719px) {
	.authority-control tbody,
	.authority-control tr,
	.authority-control th,
	.authority-control td,
	.authority-control .navbox-row > th + td {
		display: block;
		text-align: center;
	}
	.authority-control th {
		width: auto !important; /* override [[Module:Navbox]]’s inline width:1% */
	}
}