.header {
    height: 100px;
}

.header>.nav .black {
    display: block;
}
.header>.nav .white {
    display: none;
}
.header>.nav a {
    color: black !important;
}

.header>.nav {
    background-color: white;
    -webkit-box-shadow: 0px 13px 74px -15px rgba(0,0,0,0.14);
	-moz-box-shadow: 0px 13px 74px -15px rgba(0,0,0,0.14);
	box-shadow: 0px 13px 74px -15px rgba(0,0,0,0.14);
}