.navbar {
    position: sticky;
    background: #fff;
    width: 100%;
    box-shadoww: 0 0 15px rgba(0, 0, 0, .5);
}

.navbar .container .navbar-brand {
    margin-left: 60px;
}

.navbar .container .nav-menu .navbar-nav li a {
    color: #000;
}

@media (max-width: 580px) {
    .navbar {
        position: sticky;
        top: 0;
        z-index: 3;
    }
}