.ui.module.panel .tab-nav{
    padding-top:5px;
    border-bottom:none;
    position:relative;
    box-shadow:inset 0 -3px 3px rgba(0,0,0,.1)
}
.ui.module.panel .tab-nav:before{
    content:"";
    width:100%;
    height:100%;
    position:absolute;
    top:0;
    left:0;
    background:rgba(0,0,0,.1)
}
.ui.module.panel .tab-nav{
    border:solid 1px rgba(0,0,0,.05)
}