/* =====================================================
   Mega menu cho danh mục Sản phẩm
   ===================================================== */

/* ---------- DESKTOP (>= 992px) ---------- */
@media all and (min-width: 992px) {

    .navbar .nav-item.mega-menu-item {
        position: static;
    }

    .navbar .nav-item.mega-menu-item .dropdown-menu.mega-menu {
        display: block;
        opacity: 0;
        visibility: hidden;
        transition: .25s;
        left: 0;
        right: 0;
        width: 100%;
        max-width: 1320px;
        margin: 0 auto;
        padding: 0;
        border: none;
        border-radius: 14px;
        background: #fff;
        box-shadow: 0 18px 45px rgba(13, 71, 161, .16);
        overflow: hidden;
    }

    .navbar .nav-item.mega-menu-item:hover .dropdown-menu.mega-menu,
    .navbar .nav-item.mega-menu-item .dropdown-menu.mega-menu.show {
        opacity: 1;
        visibility: visible;
        top: 100%;
        transform: rotateX(0deg);
    }

    .mega-menu-inner {
        display: flex;
        align-items: stretch;
        min-height: 380px;
    }

    /* cột trái: danh mục cấp 2 */
    .mega-cats {
        list-style: none;
        margin: 0;
        padding: 10px 0;
        width: 275px;
        min-width: 275px;
        background: #f5f8fc;
        border-right: 1px solid #e6ecf4;
        max-height: 520px;
        overflow-y: auto;
    }

    .mega-cat {
        position: relative;
        display: flex;
        align-items: center;
    }

    .mega-cat>a {
        flex: 1;
        display: block;
        padding: 10px 8px 10px 20px;
        font-size: 14.5px;
        font-weight: 600;
        color: #22364d;
        text-decoration: none;
        line-height: 1.35;
        transition: .2s;
    }

    .mega-cat>.mega-cat-toggle {
        border: none;
        background: transparent;
        color: #9bacc0;
        padding: 0 16px 0 4px;
        font-size: 14px;
    }

    .mega-cat.active {
        background: #fff;
    }

    .mega-cat.active>a,
    .mega-cat:hover>a {
        color: var(--theme-color, #1a73e8);
    }

    .mega-cat.active::before {
        content: '';
        position: absolute;
        left: 0;
        top: 6px;
        bottom: 6px;
        width: 3px;
        border-radius: 0 3px 3px 0;
        background: var(--theme-color, #1a73e8);
    }

    /* cột phải: các panel */
    .mega-panels {
        flex: 1;
        padding: 22px 26px;
        max-height: 520px;
        overflow-y: auto;
    }

    .mega-panel {
        display: none;
    }

    .mega-panel.active {
        display: block;
    }

    .mega-cols {
        column-count: 4;
        column-gap: 26px;
    }

    .mega-col {
        break-inside: avoid;
        page-break-inside: avoid;
        margin-bottom: 20px;
    }

    .mega-col-title {
        display: block;
        font-size: 14.5px;
        font-weight: 700;
        color: #0d47a1;
        text-decoration: none;
        margin-bottom: 6px;
        line-height: 1.35;
    }

    .mega-col-title:hover {
        color: var(--theme-color, #1a73e8);
        text-decoration: underline;
    }

    .mega-col ul {
        list-style: none;
        margin: 0;
        padding: 0;
    }

    .mega-col ul li a {
        display: block;
        font-size: 13.5px;
        font-weight: 400;
        color: #5b6b7f;
        text-decoration: none;
        padding: 2px 0;
        line-height: 1.45;
        transition: .15s;
    }

    .mega-col ul li a:hover {
        color: var(--theme-color, #1a73e8);
        padding-left: 5px;
    }

    .mega-col ul li.mega-more a {
        font-size: 13px;
        font-weight: 600;
        color: var(--theme-color, #1a73e8);
    }

    .mega-panel-empty {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-size: 15px;
        color: #22364d;
        text-decoration: none;
        padding: 10px 0;
    }

    .mega-panel-empty i {
        font-size: 12px;
        color: var(--theme-color, #1a73e8);
    }

    /* thanh cuộn mảnh */
    .mega-cats::-webkit-scrollbar,
    .mega-panels::-webkit-scrollbar {
        width: 6px;
    }

    .mega-cats::-webkit-scrollbar-thumb,
    .mega-panels::-webkit-scrollbar-thumb {
        background: #cdd8e6;
        border-radius: 6px;
    }
}

@media all and (min-width: 992px) and (max-width: 1399px) {
    .navbar .nav-item.mega-menu-item .dropdown-menu.mega-menu {
        max-width: calc(100vw - 40px);
    }

    .mega-cols {
        column-count: 3;
    }

    .mega-cats {
        width: 240px;
        min-width: 240px;
    }
}

/* ---------- MOBILE (< 992px): accordion ---------- */
@media all and (max-width: 991px) {

    .navbar .nav-item.mega-menu-item .dropdown-menu.mega-menu {
        padding: 6px 0;
        border-radius: 15px;
        border: 1px solid var(--border-info-color, #e6ecf4);
        box-shadow: none;
    }

    .mega-menu-inner {
        display: block;
    }

    .mega-cats {
        list-style: none;
        margin: 0;
        padding: 0;
    }

    .mega-cat {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        border-bottom: 1px solid #f0f3f7;
    }

    .mega-cat:last-child {
        border-bottom: none;
    }

    .mega-cat>a {
        flex: 1;
        padding: 10px 6px 10px 16px;
        font-size: 15px;
        font-weight: 600;
        color: #22364d;
        text-decoration: none;
    }

    .mega-cat>.mega-cat-toggle {
        width: 42px;
        min-width: 42px;
        height: 42px;
        border: none;
        background: transparent;
        color: #22364d;
        font-size: 16px;
    }

    .mega-cat>.mega-cat-toggle i {
        transition: transform .3s ease;
    }

    .mega-cat.open>.mega-cat-toggle i {
        transform: rotate(90deg);
    }

    /* panel được JS chèn ngay sau mục cấp 2 tương ứng */
    .mega-panels {
        display: block;
    }

    .mega-panel {
        display: none;
        width: 100%;
        padding: 4px 16px 12px 26px;
        background: #f8fafd;
    }

    .mega-panel.open {
        display: block;
    }

    .mega-cols {
        display: block;
    }

    .mega-col {
        margin-bottom: 12px;
    }

    .mega-col-title {
        display: block;
        font-size: 14.5px;
        font-weight: 700;
        color: #0d47a1;
        text-decoration: none;
        padding: 4px 0;
    }

    .mega-col ul {
        list-style: none;
        margin: 0 0 0 12px;
        padding: 0;
    }

    .mega-col ul li a {
        display: block;
        font-size: 14px;
        color: #5b6b7f;
        text-decoration: none;
        padding: 3px 0;
    }

    .mega-col ul li.mega-more a {
        font-weight: 600;
        color: var(--theme-color, #1a73e8);
    }

    .mega-panel-empty {
        display: block;
        padding: 6px 0;
        font-size: 14px;
        color: var(--theme-color, #1a73e8);
        text-decoration: none;
    }
}