header.header {
    background-color: #000;
}

header.header nav > ul > li > a {
    text-decoration: none;
    color: #fff;
    font-weight: 600;
}

@media (max-width: 575px) {
    header.header nav > ul > li > a {
        text-decoration: none;
        color: #000;
        font-weight: 600;
    }
}