.lettera_inactive{
    border:1px solid #000033;
    background-color:#6262FF;
    width:18px;
    line-height:18px;
    font-family:Arial, Helvetica, sans-serif;
    font-size:11px;
    font-weight:700;
    color:#ffffff;
    text-align:center;
    display:block;
}

.lettere a{
    width:18px;
    height:18px;
    border:1px solid #000033;
    background-color:#D0D0D0;/*#E0E0E0*/
    line-height:18px;
    font-family:Arial, Helvetica, sans-serif;
    font-size:11px;
    font-weight:700;
    text-decoration:none;
    color:#3366FF;
    text-align:center;
    display:block;
}
    .lettere a:hover{
    width:18px;
    height:18px;
    border:1px solid #000033;
    background-color:#ffffff;
    line-height:18px;
    font-family:Arial, Helvetica, sans-serif;
    font-size:11px;
    font-weight:700;
    text-decoration:none;
    color:#3366FF;
    text-align:center;
    display:block;
    }