.nav-tabs > li{}
.nav-tabs{}
.nav-tabs > li > a{
    color: rgba(0, 0, 0, 0.47);
    border: none;
}
.nav-tabs > li.active > a, .nav-tabs > li.active > a:hover, .nav-tabs > li.active > a:focus{
    color: black;
    font-weight: bold;
    border: none;
    border-bottom: 2px solid;
    background: transparent;
}