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; }