Sombra de cajas de Navbar
box-shadow: 0 2px 5px 0 rgba(0,0,0,0.16);
Doubtful Dog
box-shadow: 0 2px 5px 0 rgba(0,0,0,0.16);// How to give shadow to navbar
.main-navigation {
box-shadow: 0 2px 2px -2px rgba(0,0,0,.2);
}