.mattblacktabs{
 
width: 100%;
overflow: hidden;
border-bottom: 1px solid white; /*bottom horizontal line that runs beneath tabs*/
border-top: 1px solid white; /*bottom horizontal line that runs beneath tabs*/
}

.mattblacktabs ul{

margin: 0;
padding: 0;

font: bold 12px Verdana;
list-style-type: none;
}

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

.mattblacktabs li a{
float: left;
display: block;
text-decoration: none;
margin: 0;
padding: 7px 8px; /*padding inside each tab*/
border-left: 1px solid white; /*right divider between tabs*/
color: white;
background: #C725D9; /*background of tabs (default state)*/
width:148px;
}

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

.mattblacktabs li a:hover, .mattblacktabs li.selected a{
background: #CB51D8; /*background of tabs for hover state, plus tab with "selected" class assigned to its LI */
color: white;
}