@media (min-width: 992px){
    .navbar li {
        margin-left : 3em;
        margin-right : 3em;
    }
}

.nav-tabs .nav-item.show .nav-link, .nav-tabs .nav-link.active {
    border-top: none;
    border-right: none;
    border-left: none;
    border-bottom: 3px solid #006CAE;
    background-color: #343A40;
    color:#fff;
    outline: none;
    box-shadow: none;
}

.nav-tabs > li.active > a, .nav-tabs > li.active > a:focus, .nav-tabs > li.active > a:hover { 
    border-top: none;
    border-right: none;
    border-left: none;
    border-bottom: 3px solid #006CAE;
    background-color: #343A40;
    color:#fff;
    outline: none;
    box-shadow: none;
}

.nav-tabs .nav-item.show .nav-link, .nav-tabs .nav-link {
    border-top: none;
    border-right: none;
    border-left: none;
    border-bottom: none;
    background-color: #000;
    color:#343A40;
    outline: none;
    box-shadow: none;
}

.nav li:hover a {
    border: none;
    background: none;
    color: #00adee;
}

.nav li:focus a {
    border: none;
    background: none;
    color: #00adee;
}

footer {
    padding-top:0px !important;
    position: fixed;
    height: 40px;
    bottom: 0;
    width: 100%;
}

.btn-outline:hover {
    color: #fff !important;
    background-color: #006CAE !important;
    border-color: #006CAE !important;
  }

  .btn-outline:active {
    color: #fff !important;
    background-color: #006CAE !important;
    border-color: #006CAE !important;
  }

  .btn-outline:hover {
    color: #fff !important;
    background-color: #006CAE !important;
    border-color: #006CAE !important;
  }

  .bg-dark {
        background-color: #000 !important;
  }

  .nav_center {
    display: block;
    margin-left: auto;
    margin-right: auto;
    width: 28%;
  }

  .nav_center2 {
    display: block;
    margin-left: auto;
    margin-right: auto;
    width: 50%;
  }