ul.list-inline:hover {
    background-color: #f8f9fa!important;    
}

ul.navbar-nav:hover {
    background-color: #212529;    
}

#mainNav .navbar-nav .nav-item .nav-link, h1.mb-5, h2.mb-5 {
    text-shadow: 1px 1px 0 #000
}