@media (max-width: 991.98px) {
    #mainNav.navbar-collapse.show {
        max-height: calc(100dvh - 70px);
        overflow-x: hidden;
        overflow-y: auto;
        overscroll-behavior: contain;
    }

    #mainNav .dropdown-menu {
        position: static !important;
        inset: auto !important;
        width: 100% !important;
        min-width: 0;
        margin: 4px 0 8px !important;
        transform: none !important;
        box-shadow: none;
    }

    #mainNav .dropdown-menu:not(.show) {
        display: none;
    }

    #mainNav .dropdown-menu.show {
        display: block;
    }

    #mainNav .mega-menu.show {
        display: block;
    }

    #mainNav .dropdown-toggle {
        position: relative;
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
    }

    #mainNav .dropdown-toggle::after {
        display: inline-block !important;
        position: static;
        margin-left: auto;
        transition: transform .2s ease;
    }

    #mainNav .dropdown-toggle.show::after {
        transform: rotate(180deg);
    }

    #mainNav .mail-menu-promo,
    #mainNav .mega-links {
        width: 100%;
    }

    #mainNav .solutions-menu {
        padding: 7px;
    }
}