.mattblacktabs{
width: 100%; 
overflow: hidden;
border-bottom: 4px solid #3A5896; /*bottom horizontal line that runs beneath tabs*/
}

.mattblacktabs ul{
margin: 0;
padding: 0;
padding-left: 5px; /*offset of tabs relative to browser left edge*/
font:  13px Trebuchet MS;
font-weight:bold;
list-style-type: none;
}

.mattblacktabs li{
display: inline;
margin: 0;
}

.mattblacktabs li a{
float: left;
display: block;
text-decoration: none;
margin: 0;
padding: 5px 10px; /*padding inside each tab*/
border-right: 1px solid white; /*right divider between tabs*/
color: white;
background: #758ebb; /*background of tabs (default state)*/ 
}

.mattblacktabs li a:visited{
color: white;
}

.mattblacktabs li a:hover, .mattblacktabs li.selected a{
color:#FFFFFF;
background: #3A5896; /*background of tabs for hover state, plus tab with "selected" class assigned to its LI */
}