.dropdown-submenu {
    position: relative;
}

.dropdown-submenu > .dropdown-menu {
    top: 0;
    left: 100%;
    margin-top: -0.5rem;
}

.dropdown-submenu > .dropdown-toggle::after {
    float: right;
    margin-top: 0.5rem;
    transform: rotate(-90deg);
}

.navbar-nav .nav-link.active,
.dropdown-item.active {
    font-weight: 600;
}

@media (max-width: 991.98px) {
    .dropdown-submenu > .dropdown-menu {
        position: static;
        margin-left: 1rem;
    }

    .dropdown-submenu > .dropdown-toggle::after {
        transform: none;
    }
}