* {padding:0; margin:0}
.dropdown {display:block; position:relative}
.dropdown dd {position:absolute; top:0; overflow:hidden;  display:none;  opacity:0}
.dropdown ul { list-style:none}
.dropdown li {display:inline;}
.dropdown a, .dropdown a:active, .dropdown a:visited {display:block; padding:5px;  width:140px; text-decoration:none;}
.dropdown a:hover {}
.dropdown .underline {}