.nav
{
    text-align: left;
    list-style: none;
    margin: 20px 0 0 20px;
    padding: 0;
    padding-left:10px;
    line-height: 34px;
    height: 36px;
    overflow: hidden;
    font-size: 14px;
    font-family: verdana;
    position: relative;
}
.nav li
{
    border: 1px solid #AAA;
    background: #D1D1D1;
    background: -o-linear-gradient(top, #ECECEC 50%, #D1D1D1 100%);
    background: -ms-linear-gradient(top, #ECECEC 50%, #D1D1D1 100%);
    background: -moz-linear-gradient(top, #ECECEC 50%, #D1D1D1 100%);
    background: -webkit-linear-gradient(top, #ECECEC 50%, #D1D1D1 100%);
    background: linear-gradient(top, #ECECEC 50%, #D1D1D1 100%);
    display: inline-block;
    position: relative;
    z-index: 0;
    border-top-left-radius: 6px;
    border-top-right-radius: 6px;
    box-shadow: 0 3px 3px rgba(0, 0, 0, 0.4), inset 0 1px 0 #FFF;
    text-shadow: 0 1px #FFF;
    margin: 0 -5px;
    padding: 0 20px;
}
.nav a
{
    color: #555;
    text-decoration: none;
}
.nav li.selected
{
    background: #FFF;
    color: #333;
    z-index: 2;
    border-bottom-color: #FFF;
}
.nav:before
{
    position: absolute;
    content: " ";
    width: 100%;
    bottom: 0;
    left: 0;
    border-bottom: 1px solid #AAA;
    z-index: 1;
}
.nav li:before, .nav li:after
{
    border: 1px solid #AAA;
    position: absolute;
    bottom: -1px;
    width: 5px;
    height: 5px;
    content: " ";
}
.nav li:before
{
    left: -6px;
    border-bottom-right-radius: 6px;
    border-width: 0 1px 1px 0;
    box-shadow: 2px 2px 0 #D1D1D1;
}
.nav li:after
{
    right: -6px;
    border-bottom-left-radius: 6px;
    border-width: 0 0 1px 1px;
    box-shadow: -2px 2px 0 #D1D1D1;
}
.nav li.selected:before
{
    box-shadow: 2px 2px 0 #FFF;
}
.nav li.selected:after
{
    box-shadow: -2px 2px 0 #FFF;
}