Both .topic-post:before { .. } and .topic-post > article:before { .. } work for me. Additional classes depend on how or for whom you want to restrict that view. Not sure on which element you have the .mod-highlight class.
Both .topic-post:before { .. } and .topic-post > article:before { .. } work for me. Additional classes depend on how or for whom you want to restrict that view. Not sure on which element you have the .mod-highlight class.