/* Theme-aware mobile-first */
#top-menu-list .mobile-megamenu,
#top-menu-list li.dropdown > ul {
    max-height: 0;
    opacity: 0;
    visibility: hidden;
    overflow: hidden;
    padding: 0;
    background: var(--surface-color);
    color: var(--default-color);
    box-shadow: none;
    transition: max-height 320ms ease, opacity 200ms ease, visibility 200ms;
}

/* Mobile open state */
@media (max-width: 991px) {
    #top-menu-list li.open > .mobile-megamenu,
    #top-menu-list li.open > ul,
    #top-menu-list li.open > ul.mobile-megamenu,
    #top-menu-list li.dropdown.open > ul {
        max-height: 60vh;
        opacity: 1;
        visibility: visible;
        overflow: auto;
        padding: 0.25rem 0;
        box-shadow: var(--shadow-md);
    }

    #top-menu-list > li {
        display: block;
    }

        #top-menu-list > li > a {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0.75rem 1rem;
            min-height: 44px;
            color: var(--default-color);
        }

    #top-menu-list li.open > .mobile-megamenu {
        max-height: calc(60vh - 2rem);
        overflow-y: auto;
    }
}

/* Desktop */
@media (min-width: 992px) {
    #top-menu-list .mobile-megamenu {
        max-height: 0;
        opacity: 0;
        visibility: hidden;
        overflow: hidden;
        transition: none;
    }

    #top-menu-list li.open > .desktop-megamenu {
        display: block;
        background: var(--surface-color);
        color: var(--default-color);
        box-shadow: var(--shadow-md);
    }

    .desktop-megamenu {
        position: absolute;
        left: 0;
        top: 100%;
        z-index: 1000;
        display: none;
    }
}

#top-menu-list a:hover {
    color: var(--accent-color);
}


/* Mobile only fix */
@media (max-width: 991px) {
    #top-menu-list .mobile-megamenu,
    #top-menu-list li.dropdown > ul {
        max-height: 0;
        opacity: 0;
        visibility: hidden;
        overflow: hidden;
        padding: 0;
        margin: 0;
        list-style: none;
        background: var(--surface-color);
        color: var(--default-color);
        box-shadow: none;
        transition: max-height 320ms ease, opacity 200ms ease, visibility 200ms ease, padding 200ms ease;
        display: block;
    }

        #top-menu-list > li,
        #top-menu-list li.dropdown,
        #top-menu-list .mobile-megamenu li {
            display: block;
            width: 100%;
        }

            #top-menu-list > li > a,
            #top-menu-list li.dropdown > a,
            #top-menu-list .mobile-megamenu li > a,
            #top-menu-list li.dropdown > ul li > a {
                display: flex;
                align-items: center;
                justify-content: space-between;
                width: 100%;
                min-height: 44px;
                padding: 0.75rem 1rem;
                color: var(--default-color);
            }

    #top-menu-list .toggle-dropdown,
    #top-menu-list .bi-chevron-down {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-width: 36px;
        min-height: 36px;
        cursor: pointer;
        flex-shrink: 0;
    }

    #top-menu-list li.open > .mobile-megamenu,
    #top-menu-list li.open > ul,
    #top-menu-list li.open > ul.mobile-megamenu,
    #top-menu-list li.dropdown.open > ul {
        max-height: 60vh;
        opacity: 1;
        visibility: visible;
        overflow-y: auto;
        overflow-x: hidden;
        padding: 0.25rem 0;
        box-shadow: var(--shadow-md);
    }

    #top-menu-list li.open > .mobile-megamenu {
        max-height: calc(60vh - 2rem);
    }

    #top-menu-list li.open > a .toggle-dropdown,
    #top-menu-list li.open > a .bi-chevron-down {
        transform: rotate(180deg);
        transition: transform 0.25s ease;
    }
}