Template:Columns/styles.css

.columns {
	margin-top: .3em;
	column-width: 30em;
}

.columns-small {
	font-size: 90%;
}

.columns-rules {
	column-rule: thin solid var(--border-color-base);
}

/* Reset top margin for lists in div col */
.columns dl,
.columns ol,
.columns ul {
	margin-top: 0;
}

/* Avoid elements breaking between columns
   See also Template:No col break */
.columns li,
.columns dd {
	page-break-inside: avoid; /* Removed from CSS in favor of break-inside c. 2020 */
	break-inside: avoid-column;
}