body {
    background: #f8f9fa;
    font-family: Arial, Helvetica, sans-serif;
}
.navbar {
    box-shadow: 0 2px 10px rgba(0,0,0,.08);
}
footer {
    background: #0f172a;
    color: white;
    padding: 30px 0;
}
/* mega menu */
@media (min-width: 992px) {
    .navbar .dropdown {
        position: static;
    }
    .navbar .dropdown-menu {
        display: block;
        opacity: 0;
        visibility: hidden;
        transition: .3s;
        left: 0;
        right: 0;
        width: 100%;
        margin-top: 0;
        border: none;
        border-radius: 0;
    }
    .navbar .dropdown:hover .dropdown-menu {
        opacity: 1;
        visibility: visible;
    }
}