body{
 font: 12px Verdana,sans-serif;
}
ul,li{
 margin: 0;
 padding: 0;
}
#menu li{
 height: 30px;
 line-height: 30px;
 text-align: center;
 float: left;
 overflow: hidden;
}
#menu a{
 width: 90px;
 background: #363636;
 color: #fff;
 text-decoration: none;
 display: block;
}
#menu a:hover{
 background: #a2a2a2;
 color: red;
 margin-top: -30px;
}