Wikipedia:WikiProject Guild of Copy Editors/Section header/styles.css

.wp-goce-section-header h3,
.wp-goce-section-header .mw-heading3,
.wp-goce-section-header h4,
.wp-goce-section-header .mw-heading4 {
	margin: 0.5em 0;
	border: 1px silver solid;
	background-color: lightsteelblue;
	padding: 1em 0.5em 0.5em;
}