div.csslessonhead {
   margin-top:20px;
   width:80%;
   border-top:solid 1px #88bbee;
   border-bottom:solid 1px #88bbee;
   font:normal 24px verdana,sans-serif;
   padding-top:4px;
   padding-bottom:6px;
}

span.css_exercise {
   font-weight:bold;
   color:#bb0000;
}