"

From 2013.igem.org

.tabs li {

 float: left;
 position: relative;

} .tabs a {

 float: left;
 padding: 10px 40px;
 text-decoration: none;

 color: black;
 background: #ddc385;

 border-top-left-radius: 15px;
 border-top-right-radius: 15px;

}