/**
 * VN header menu — dynamic dropdowns, mega brands, mobile accordion.
 * Namespace: .vn-site-nav, .vn-dropdown, .vn-mega-menu, .vn-mobile-nav
 */

:root {
    --vn-menu-accent: #23652d;
    --vn-menu-accent-soft: rgba(35, 101, 45, 0.08);
    --vn-header-bottom: 84px;
}

/* Row: link + mobile toggle (toggle is sibling of anchor, not inside it) */
.vn-site-nav .vn-menu-item__row,
.vn-site-nav .vn-mobile-menu-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.vn-site-nav .vn-menu-item__row > a,
.vn-site-nav .vn-mobile-menu-row > a {
    flex: 1 1 auto;
    min-width: 0;
}

.vn-mobile-submenu-toggle {
    display: none;
    flex: 0 0 auto;
    width: 36px;
    height: 36px;
    border: 1px solid rgba(0, 0, 0, 0.12);
    border-radius: 8px;
    background: #fff;
    color: #111;
    cursor: pointer;
    padding: 0;
    align-items: center;
    justify-content: center;
}

.vn-mobile-submenu-toggle__icon {
    position: relative;
    width: 12px;
    height: 12px;
    display: block;
}

.vn-mobile-submenu-toggle__icon::before,
.vn-mobile-submenu-toggle__icon::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 12px;
    height: 2px;
    background: currentColor;
    transform: translate(-50%, -50%);
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.vn-mobile-submenu-toggle__icon::after {
    transform: translate(-50%, -50%) rotate(90deg);
}

.vn-menu-item.is-open .vn-mobile-submenu-toggle__icon::after {
    transform: translate(-50%, -50%) rotate(0deg);
    opacity: 0;
}

/* Desktop hover / focus colors — system green */
.vn-site-header__nav .vn-primary-menu > li > .vn-menu-item__row > a:hover,
.vn-site-header__nav .vn-primary-menu > li.current-menu-item > .vn-menu-item__row > a,
.vn-site-header__nav .vn-primary-menu > li.current-menu-ancestor > .vn-menu-item__row > a,
.vn-site-header__nav .vn-main-menu > li > .vn-menu-item__row > a:hover {
    color: var(--vn-menu-accent);
}

/* Shared dropdown panel — desktop */
@media (min-width: 992px) {
    .vn-site-header__nav .vn-dropdown,
    .vn-site-header__nav .vn-mega-menu {
        position: fixed;
        top: var(--vn-header-bottom, 84px);
        left: 50%;
        background: #fff;
        border: 1px solid rgba(0, 0, 0, 0.08);
        border-radius: 0 0 12px 12px;
        box-shadow: 0 20px 44px rgba(0, 0, 0, 0.12);
        padding: 24px 28px;
        opacity: 0;
        visibility: hidden;
        transform: translateX(-50%) translateY(8px);
        transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s ease;
        z-index: 410;
        pointer-events: none;
        max-height: calc(100vh - var(--vn-header-bottom, 84px) - 16px);
        overflow-y: auto;
        overflow-x: hidden;
    }

    .vn-site-header__nav .vn-menu-item--products > .vn-dropdown--products {
        position: absolute;
        top: 100%;
        left: 50%;
        width: auto;
        min-width: 220px;
        max-width: min(480px, calc(100vw - 48px));
        padding: 24px 28px;
    }

    .vn-site-header__nav .vn-menu-item--products.is-open > .vn-dropdown--products,
    .vn-site-header__nav .vn-menu-item--products:focus-within > .vn-dropdown--products {
        transform: translateX(-50%) translateY(0);
    }

    .vn-site-header__nav .vn-menu-item--posts > .vn-dropdown--posts {
        position: absolute;
        top: 100%;
        left: 50%;
        width: auto;
        min-width: 220px;
        max-width: min(480px, calc(100vw - 48px));
        padding: 24px 28px;
    }

    .vn-site-header__nav .vn-menu-item--posts.is-open > .vn-dropdown--posts,
    .vn-site-header__nav .vn-menu-item--posts:focus-within > .vn-dropdown--posts {
        transform: translateX(-50%) translateY(0);
    }

    .vn-site-header__nav .vn-mega-menu--brands-compact {
        width: min(360px, calc(100vw - 40px));
        max-width: 400px;
    }

    .vn-site-header__nav .vn-menu-item.has-dropdown.is-open > .vn-dropdown,
    .vn-site-header__nav .vn-menu-item.has-dropdown.is-open > .vn-mega-menu,
    .vn-site-header__nav .vn-menu-item.has-dropdown:focus-within > .vn-dropdown,
    .vn-site-header__nav .vn-menu-item.has-dropdown:focus-within > .vn-mega-menu {
        opacity: 1;
        visibility: visible;
        transform: translateX(-50%) translateY(0);
        pointer-events: auto;
    }

    .vn-site-header__nav .vn-menu-item.has-dropdown--normal.is-open > .sub-menu,
    .vn-site-header__nav .vn-menu-item.has-dropdown--normal:focus-within > .sub-menu {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
        pointer-events: auto;
    }

    .vn-site-header__nav .vn-menu-item.has-dropdown--normal > .sub-menu {
        position: absolute;
        top: 100%;
        left: 0;
        min-width: 220px;
        background: #fff;
        list-style: none;
        padding: 10px 0;
        margin: 0;
        border: 1px solid rgba(0, 0, 0, 0.08);
        border-radius: 0 0 10px 10px;
        box-shadow: 0 18px 40px rgba(0, 0, 0, 0.12);
        opacity: 0;
        visibility: hidden;
        transform: translateY(8px);
        transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
        z-index: 410;
        pointer-events: none;
    }
}

/* Product dropdown — single column like Góc tư vấn */
.vn-site-header__nav .vn-dropdown--products {
    min-width: 220px;
    max-width: min(480px, calc(100vw - 48px));
}

.vn-product-menu {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
    list-style: none;
    margin: 0;
    padding: 0;
}

.vn-product-menu--cols-1,
.vn-product-menu--cols-2,
.vn-product-menu--cols-3,
.vn-product-menu--cols-4 {
    grid-template-columns: 1fr;
}

.vn-product-menu__col {
    padding: 0;
}

.vn-product-menu__heading {
    display: block;
    margin: 0;
    font-family: "Be Vietnam Pro", system-ui, sans-serif;
    font-size: 14px;
    font-weight: 600;
    line-height: 1.35;
    text-transform: none;
}

.vn-product-menu__heading a {
    display: block;
    padding: 8px 0;
    color: #222;
    text-decoration: none;
}

.vn-product-menu__heading a:hover {
    color: var(--vn-menu-accent);
}

.vn-product-menu__solo {
    display: block;
    padding: 8px 0;
    font-family: "Be Vietnam Pro", system-ui, sans-serif;
    font-size: 14px;
    font-weight: 600;
    color: #222;
    text-decoration: none;
    text-transform: none;
}

.vn-product-menu__solo:hover {
    color: var(--vn-menu-accent);
}

.vn-product-menu__children {
    list-style: none;
    margin: 0;
    padding: 0 0 0 12px;
}

.vn-product-menu__children a {
    display: block;
    padding: 8px 0;
    font-family: "Be Vietnam Pro", system-ui, sans-serif;
    font-size: 14px;
    font-weight: 600;
    color: #222;
    text-decoration: none;
}

.vn-product-menu__children a:hover {
    color: var(--vn-menu-accent);
}

/* Post categories dropdown */
.vn-site-header__nav .vn-dropdown--posts {
    min-width: 220px;
    max-width: min(480px, calc(100vw - 48px));
}

.vn-post-menu {
    display: grid;
    gap: 4px 20px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.vn-post-menu--cols-1 {
    grid-template-columns: 1fr;
}

.vn-post-menu--cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.vn-post-menu a {
    display: block;
    padding: 8px 0;
    font-family: "Be Vietnam Pro", system-ui, sans-serif;
    font-size: 14px;
    font-weight: 600;
    color: #222;
    text-decoration: none;
}

.vn-post-menu a:hover {
    color: var(--vn-menu-accent);
}

/* Brand mega menu — 2 logos per row, wrap downward */
.vn-site-header__nav .vn-mega-menu--brands {
    width: min(400px, calc(100vw - 48px));
    padding: 24px 28px 28px;
}

.vn-brand-menu-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 16px;
    justify-items: stretch;
    align-items: stretch;
}

.vn-brand-menu-grid--count-1 {
    grid-template-columns: minmax(120px, 200px);
    justify-content: flex-start;
}

.vn-brand-menu-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 88px;
    height: 100%;
    padding: 14px 12px;
    border-radius: 10px;
    border: 1px solid rgba(0, 0, 0, 0.06);
    background: #fff;
    text-decoration: none;
    color: #111;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.vn-brand-menu-card:hover {
    transform: scale(1.03);
    border-color: rgba(35, 101, 45, 0.25);
    box-shadow: 0 8px 24px rgba(35, 101, 45, 0.1);
}

.vn-brand-menu-card img {
    width: auto;
    height: auto;
    max-width: 130px;
    max-height: 52px;
    object-fit: contain;
    display: block;
}

.vn-brand-menu-card__name {
    font-family: "Be Vietnam Pro", system-ui, sans-serif;
    font-size: 13px;
    font-weight: 700;
    text-align: center;
    line-height: 1.35;
}

/* Normal submenu — green accent */
.vn-site-header__nav .vn-primary-menu .sub-menu a:hover {
    color: var(--vn-menu-accent);
    background: var(--vn-menu-accent-soft);
}

/* Mobile accordion */
@media (max-width: 991px) {
    .vn-mobile-nav .vn-mobile-submenu-toggle {
        display: inline-flex;
    }

    .vn-mobile-nav .vn-menu-item__row > a,
    .vn-mobile-nav .vn-mobile-menu-row > a {
        padding-right: 0;
    }

    .vn-mobile-nav .vn-dropdown,
    .vn-mobile-nav .vn-mega-menu,
    .vn-mobile-nav .sub-menu {
        display: none;
        position: static;
        width: 100%;
        max-width: 100%;
        min-width: 0;
        transform: none;
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        border: 0;
        border-radius: 0;
        box-shadow: none;
        padding: 0 0 12px 12px;
        margin: 0;
        max-height: none;
        overflow: visible;
    }

    .vn-mobile-nav .vn-menu-item.is-open > .vn-dropdown,
    .vn-mobile-nav .vn-menu-item.is-open > .vn-mega-menu,
    .vn-mobile-nav .vn-menu-item.is-open > .sub-menu {
        display: block;
    }

    .vn-mobile-nav .vn-menu-caret {
        display: none;
    }

    .vn-mobile-nav .vn-product-menu,
    .vn-mobile-nav .vn-post-menu {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .vn-mobile-nav .vn-product-menu__children {
        padding-left: 12px;
    }

    .vn-mobile-nav .vn-product-menu__children a,
    .vn-mobile-nav .vn-post-menu a {
        padding: 9px 0;
        font-size: 14px;
    }

    .vn-mobile-nav .vn-brand-menu-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 10px;
        justify-content: stretch;
    }

    .vn-mobile-nav .vn-brand-menu-card {
        min-height: 72px;
        padding: 10px 8px;
    }

    .vn-mobile-nav .vn-brand-menu-card img {
        max-width: 96px;
        max-height: 40px;
    }
}

@media (max-width: 1024px) {
    .vn-product-menu--cols-4 {
        grid-template-columns: 1fr;
    }
}