.navbar-nav .nav-item .nav-link,
.navbar-nav .nav-item form .nav-link.btn-link {
    transition: background 0.2s, color 0.2s;
    border-radius: 20px;
}

.navbar-nav .nav-item .nav-link:hover,
.navbar-nav .nav-item form .nav-link.btn-link:hover {
    background: #000;
    color: #fff8dc !important;
    border-radius: 20px;
}