#mainTabs .nav-link {
    font-size: 14px;
    padding: 4px 12px;
    color: #6c757d;
    background: none;
    border-radius: 0;
    border-bottom: 2px solid transparent;
}

#mainTabs .nav-link.active {
    color: #0d6efd;
    background: none;
    border-bottom-color: #0d6efd;
}

#mainTabs .nav-link:hover:not(.active) {
    color: #343a40;
    background: none;
}