Editing Template:Infobox settlement/styles.css

/* Settlement infobox styling */

.ib-settlement {
	border-collapse: collapse;
	line-height: 1.2em;
	box-sizing: border-box;
}

/* Do not force mobile full-width. The main table width is set by bodystyle in Template:Infobox settlement. */

.ib-settlement td,
.ib-settlement th {
	border-top: 1px solid var(--border-color-base, #a2a9b1);
	padding: 0.4em 0.6em;
	box-sizing: border-box;
}

.ib-settlement .mergedtoprow .infobox-full-data,
.ib-settlement .mergedtoprow .infobox-header,
.ib-settlement .mergedtoprow .infobox-data,
.ib-settlement .mergedtoprow .infobox-label,
.ib-settlement .mergedtoprow .infobox-below {
	border-top: 1px solid var(--border-color-base, #a2a9b1);
	padding: 0.4em 0.6em 0.2em;
}

.ib-settlement .mergedrow .infobox-full-data,
.ib-settlement .mergedrow .infobox-data,
.ib-settlement .mergedrow .infobox-label {
	border: 0;
	padding: 0 0.6em 0.2em;
}

.ib-settlement .mergedbottomrow .infobox-full-data,
.ib-settlement .mergedbottomrow .infobox-data,
.ib-settlement .mergedbottomrow .infobox-label {
	border-top: 0;
	border-bottom: 1px solid var(--border-color-base, #a2a9b1);
	padding: 0 0.6em 0.4em;
}

.ib-settlement .maptable {
	border: 0;
	padding: 0;
}

.ib-settlement .infobox-above {
	font-size: 125%;
	line-height: 1.3em;
	text-align: center;
}

.ib-settlement .infobox-subheader {
	font-weight: bold;
	text-align: center;
}

.ib-settlement .infobox-header,
.ib-settlement .infobox-below {
	text-align: left;
}

.ib-settlement-native {
	font-weight: normal;
	padding-top: 0.2em;
}

.ib-settlement-other-name {
	font-size: 78%;
}

.ib-settlement-official {
	font-weight: bold;
}

.ib-settlement-caption {
	padding: 0.3em 0 0;
}

.ib-settlement-caption-link {
	padding: 0.2em 0;
}

.ib-settlement-nickname {
	display: inline;
}

.ib-settlement-fn {
	font-weight: normal;
	display: inline;
}