ul.tabnav
{
    /* general settings */
    text-align: left; /* set to left, right or center */
    margin: 1em 0 1em 0; /* set margins as desired */
    font: bold 13px verdana, arial, sans-serif; /* set font as desired */
    border-bottom: 1px solid #486291; /* set border COLOR as desired */
    list-style-type: none;
    padding: 3px 10px 3px 10px; /* THIRD number must change with respect to padding-top (X) below */
}
ul.tabnav li
{
    /* do not change */
    display: inline;
}
ul.tabnav li a
{
    /* settings for all tab links */
    padding: 3px 4px; /* set padding (tab size) as desired; FIRST number must change with respect to padding-top (X) above */
    border: 1px solid #486291; /* set border COLOR as desired; usually matches border color specified in #tabnav */
    background-color: #F0F2F7; /* set unselected tab background color as desired */
    color: #666; /* set unselected tab link color as desired */
    margin-right: 0px; /* set additional spacing between tabs as desired */
    text-decoration: none;
    border-bottom: none;
}
ul.tabnav a:hover
{
    /* settings for hover effect */
    background: #fff; /* set desired hover color */
}
ul.tabnav .selected
{
    /* settings for selected tab */
    border-bottom: 1px solid #fff; /* set border color to page background color */
    background-color: #fff; /* set background color to match above border color */
}
ul.tabnav .selected a
{
    /* settings for selected tab link */
    background-color: #fff; /* set selected tab background color as desired */
    color: #000; /* set selected tab link color as desired */
    position: relative;
    top: 1px;
    padding-top: 3px; /* must change with respect to padding (X) above and below */
}