MediaWiki:Common.css

 /* Trying to introduce common.css - did I already see it here? */

 h2.sectionheader {
   margin-top: 30px;
   padding: 5px;
   clear: left;
   border: 1px solid #cedff2;
   background: #f5faff;
 }

 dt {
   float: left;
   width: 100px;
   background-color: green;
 }
 dd {
   margin: 3px 0 3px 100px;
   background-color: red;
 }

 div.param {
   margin: 0;
   padding: 0;
   background-color: #FAFAFA;
 }