Editing Template:Reflist/styles.css

/* {{pp|small=yes}} */
/* columns-2 and columns-3 are legacy for "2 or more" column view from when the
 * template was implemented with column-count.
 */
.reflist-columns-2 {
	column-width: 30em;
}
.reflist-columns-3 {
	column-width: 25em;
}
/* Match Vector 2022 after [[gerrit:1185300]]. */
body.skin-vector-2022 .reflist-columns-2 {
	column-width: 27em;
}
body.skin-vector-2022 .reflist-columns-3 {
	column-width: 22.5em;
}

/* These should probably be moved to MediaWiki:Common.css to work with <references> as well. */
.references[data-mw-group=upper-alpha] {
	list-style-type: upper-alpha;
}

.references[data-mw-group=upper-roman] {
	list-style-type: upper-roman;
}

.references[data-mw-group=lower-alpha] {
	list-style-type: lower-alpha;
}

.references[data-mw-group=lower-greek] {
	list-style-type: lower-greek;
}

.references[data-mw-group=lower-roman] {
	list-style-type: lower-roman;
}

/* Liststyle param. */
div.reflist-liststyle-upper-alpha .references {
	list-style-type: upper-alpha;
}

div.reflist-liststyle-upper-roman .references {
	list-style-type: upper-roman;
}

div.reflist-liststyle-lower-alpha .references {
	list-style-type: lower-alpha;
}

div.reflist-liststyle-lower-greek .references {
	list-style-type: lower-greek;
}

div.reflist-liststyle-lower-roman .references {
	list-style-type: lower-roman;
}