/* ==========================================================================
   Noi That Fami - Design System tokens (xem docs/DESIGN_SYSTEM.md)
   ========================================================================== */
@font-face {
    font-family: 'Inter';
    src: url('../fonts/inter-var.woff2') format('woff2');
    font-weight: 100 900;
    font-style: normal;
    font-display: swap;
}

:root {
    /* Color */
    --color-primary: #16324F;
    --color-primary-dark: #0E2138;
    --color-secondary: #2B2F36;
    --color-accent: #A8672E;
    --color-accent-dark: #8B5525;
    --color-bg: #FFFFFF;
    --color-bg-alt: #F5F6F8;
    --color-border: #E3E6EA;
    --color-text: #1F2328;
    --color-text-muted: #5B6470;
    --color-success: #2E7D52;
    --color-danger: #B3382C;

    /* Spacing */
    --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px;
    --space-5: 24px; --space-6: 32px; --space-7: 48px; --space-8: 64px; --space-9: 96px;

    /* Radius */
    --radius-sm: 4px; --radius-md: 6px; --radius-lg: 8px; --radius-xl: 12px;

    /* Shadow */
    --shadow-sm: 0 1px 2px rgba(0,0,0,.04);
    --shadow-md: 0 4px 12px rgba(0,0,0,.06);

    --container-width: 1280px;
}

/* Reset tối giản */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    font-size: 16px;
    line-height: 1.6;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 { margin: 0; font-weight: 600; color: var(--color-secondary); }
p { margin: 0; }
button { font-family: inherit; cursor: pointer; }

h1 { font-size: 2.25rem; font-weight: 700; line-height: 1.2; }
h2 { font-size: 1.75rem; line-height: 1.25; }
h3 { font-size: 1.375rem; line-height: 1.3; }
h4 { font-size: 1.125rem; line-height: 1.4; }

@media (min-width: 768px) {
    h1 { font-size: 3rem; line-height: 1.15; }
    h2 { font-size: 2rem; }
}

.container {
    max-width: var(--container-width);
    margin-inline: auto;
    padding-inline: 24px;
}
@media (min-width: 1024px) {
    .container { padding-inline: 40px; }
}

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 60;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
}
.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-5);
    height: 72px;
}
.site-logo__text {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-primary);
    letter-spacing: -0.01em;
}
.primary-nav { display: none; }
.primary-menu { display: flex; align-items: center; gap: var(--space-6); }
.primary-menu > li > a {
    font-weight: 500;
    font-size: 0.9375rem;
    color: var(--color-text);
    padding: var(--space-2) 0;
    transition: color .15s ease;
}
.primary-menu > li > a:hover { color: var(--color-primary); }
.site-header__actions { display: flex; align-items: center; gap: var(--space-3); }
.icon-btn {
    background: none; border: none; padding: var(--space-2);
    color: var(--color-text-muted); display: flex;
}
.icon-btn:hover { color: var(--color-primary); }

.mobile-menu-toggle {
    display: flex; flex-direction: column; gap: 4px;
    background: none; border: none; padding: var(--space-2);
}
.mobile-menu-toggle span { width: 22px; height: 2px; background: var(--color-secondary); border-radius: 2px; }

.search-panel { border-top: 1px solid var(--color-border); background: var(--color-bg-alt); }
.search-panel[hidden] { display: none; }
.search-form { max-width: var(--container-width); margin: 0 auto; padding: var(--space-4) 24px; display: flex; gap: var(--space-2); position: relative; }
.search-form input { flex: 1; padding: var(--space-3); border: 1px solid var(--color-border); border-radius: var(--radius-md); }
.search-form button { padding: var(--space-3) var(--space-5); background: var(--color-primary); color: #fff; border: none; border-radius: var(--radius-md); }

.search-suggest {
    position: absolute; top: 100%; left: 24px; right: 24px; margin-top: var(--space-2);
    background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md); max-height: 400px; overflow-y: auto; z-index: 60;
}
.search-suggest__item {
    display: flex; align-items: center; gap: var(--space-3); padding: var(--space-3);
    border-bottom: 1px solid var(--color-border);
}
.search-suggest__item:last-child { border-bottom: none; }
.search-suggest__item:hover { background: var(--color-bg-alt); }
.search-suggest__thumb { width: 48px; height: 48px; flex-shrink: 0; border-radius: var(--radius-sm); overflow: hidden; }
.search-suggest__thumb img { width: 100%; height: 100%; object-fit: cover; }
.search-suggest__info { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.search-suggest__name { font-size: 0.9375rem; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.search-suggest__price { font-size: 0.8125rem; color: var(--color-text-muted); }
.search-suggest__empty { padding: var(--space-4); text-align: center; color: var(--color-text-muted); font-size: 0.875rem; }

/* ==========================================================================
   Mega menu (danh mục sản phẩm) - đóng mặc định, click để sổ ra
   ========================================================================== */
.menu-item-megamenu > a {
    display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
    background: var(--color-primary); color: #fff !important;
    padding: 10px 16px; border-radius: var(--radius-md);
    font-weight: 600; transition: background-color .15s ease;
}
.menu-item-megamenu > a::before {
    content: ''; width: 16px; height: 16px; flex-shrink: 0;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round'%3E%3Cline x1='4' y1='6' x2='20' y2='6'/%3E%3Cline x1='4' y1='12' x2='20' y2='12'/%3E%3Cline x1='4' y1='18' x2='20' y2='18'/%3E%3C/svg%3E");
    background-size: contain; background-repeat: no-repeat;
}
.menu-item-megamenu > a::after {
    content: ''; width: 7px; height: 7px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor;
    transform: rotate(45deg); margin-top: -3px; transition: transform .15s ease;
}
.menu-item-megamenu:hover > a,
.menu-item-megamenu.is-open > a { background: var(--color-primary-dark); }
.menu-item-megamenu.is-open > a::after { transform: rotate(-135deg); margin-top: 3px; }

.mega-menu {
    position: absolute; top: 100%; left: 0; right: 0;
    background: #fff; border-top: 3px solid var(--color-accent); box-shadow: 0 16px 32px rgba(15,25,40,.12);
    z-index: 55; max-height: 75vh; overflow-y: auto;
    animation: ntf-fade-down .18s ease;
}
.mega-menu[hidden] { display: none; }
@keyframes ntf-fade-down {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
}

.mega-menu__head { padding-top: var(--space-5); }
.mega-menu__head h4 { margin-top: 2px; }

.mega-menu__grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-2);
    padding-block: var(--space-5);
}
.mega-menu__item {
    display: flex; align-items: center; gap: var(--space-3); padding: var(--space-3);
    border-radius: var(--radius-md); border: 1px solid transparent;
    transition: background-color .15s ease, border-color .15s ease, transform .15s ease;
}
.mega-menu__item:hover {
    background: var(--color-bg-alt); border-color: var(--color-border); transform: translateX(2px);
}
.mega-menu__item-icon {
    flex-shrink: 0; width: 40px; height: 40px; border-radius: 50%;
    background: var(--color-bg-alt); color: var(--color-primary);
    display: flex; align-items: center; justify-content: center;
    transition: background-color .15s ease, color .15s ease;
}
.mega-menu__item:hover .mega-menu__item-icon { background: var(--color-accent); color: #fff; }
.mega-menu__item-text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.mega-menu__item-name { font-weight: 600; font-size: 0.9375rem; color: var(--color-text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mega-menu__item-count { font-size: 0.75rem; color: var(--color-text-muted); }
.mega-menu__footer { border-top: 1px solid var(--color-border); background: var(--color-bg-alt); padding-block: var(--space-4); text-align: center; }

@media (min-width: 1280px) {
    .mega-menu__grid { grid-template-columns: repeat(5, 1fr); }
}

.mobile-nav[hidden] { display: none; }
.mobile-nav { padding: var(--space-4) 24px var(--space-6); border-top: 1px solid var(--color-border); }
.mobile-menu li { border-bottom: 1px solid var(--color-border); }
.mobile-menu a { display: block; padding: var(--space-4) 0; font-weight: 500; }
.mobile-nav__cta { display: block; text-align: center; margin-top: var(--space-4); }

@media (min-width: 1024px) {
    .primary-nav { display: block; }
    .mobile-menu-toggle, .mobile-nav { display: none; }
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 12px 24px; border-radius: var(--radius-md);
    font-weight: 600; font-size: 0.9375rem;
    border: 1px solid transparent;
    transition: background-color .15s ease, color .15s ease, border-color .15s ease;
    white-space: nowrap;
}
.btn--primary { background: var(--color-accent); color: #fff; }
.btn--primary:hover { background: var(--color-accent-dark); }
.btn--secondary { background: #fff; color: var(--color-primary); border-color: var(--color-primary); }
.btn--secondary:hover { background: var(--color-primary); color: #fff; }
.btn--dark { background: var(--color-primary); color: #fff; }
.btn--dark:hover { background: var(--color-primary-dark); }

/* ==========================================================================
   Sections & headings
   ========================================================================== */
.section { padding-block: var(--space-7); }
.section--bg-alt { background: var(--color-bg-alt); }
@media (min-width: 1024px) { .section { padding-block: var(--space-8); } }

.section-heading { margin-bottom: var(--space-6); max-width: 640px; }
.section-heading--left { margin-inline: 0; }
.eyebrow {
    display: inline-block; font-size: 0.75rem; font-weight: 600;
    text-transform: uppercase; letter-spacing: 0.04em;
    color: var(--color-accent); margin-bottom: var(--space-2);
}
.section-desc { color: var(--color-text-muted); margin-top: var(--space-2); font-size: 1.0625rem; }
.section-footer-cta { margin-top: var(--space-6); display: flex; justify-content: center; }

/* ==========================================================================
   Grid
   ========================================================================== */
.grid { display: grid; gap: var(--space-5); grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(2, 1fr); }
.grid--4 { grid-template-columns: repeat(2, 1fr); }
@media (min-width: 768px) {
    .grid--3 { grid-template-columns: repeat(3, 1fr); }
    .grid--4 { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1200px) {
    .grid--4 { grid-template-columns: repeat(4, 1fr); }
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero { padding-block: var(--space-8); background: var(--color-bg-alt); }
.hero__inner { display: grid; gap: var(--space-7); align-items: center; }
.hero__desc { color: var(--color-text-muted); font-size: 1.125rem; margin-top: var(--space-4); max-width: 52ch; }
.hero__actions { display: flex; gap: var(--space-4); margin-top: var(--space-6); flex-wrap: wrap; }
.hero__media-placeholder {
    aspect-ratio: 4/3; border-radius: var(--radius-xl);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
}
@media (min-width: 1024px) {
    .hero__inner { grid-template-columns: 1.1fr 1fr; }
    .hero__media-placeholder { aspect-ratio: 21/9; }
}

/* ==========================================================================
   Trust bar
   ========================================================================== */
.trust-bar { background: var(--color-primary); color: #fff; padding-block: var(--space-6); }
.trust-bar__inner { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-5); text-align: center; }
.trust-stat strong { display: block; font-size: 1.75rem; font-weight: 700; }
.trust-stat span { font-size: 0.875rem; color: rgba(255,255,255,.75); }
@media (min-width: 768px) { .trust-bar__inner { grid-template-columns: repeat(4, 1fr); } }

/* ==========================================================================
   Cards: product / category / post / solution / why-us / showcase
   ========================================================================== */
.product-card, .category-card, .post-card {
    display: block; background: #fff; border: 1px solid var(--color-border);
    border-radius: var(--radius-lg); overflow: hidden; transition: box-shadow .15s ease;
}
.product-card:hover, .category-card:hover, .post-card:hover { box-shadow: var(--shadow-md); }

.product-card__image { position: relative; aspect-ratio: 1/1; background: var(--color-bg-alt); }
.product-card__image img { width: 100%; height: 100%; object-fit: cover; }
.product-card__badge { position: absolute; top: var(--space-3); left: var(--space-3); }
.product-card__body { padding: var(--space-4); }
.product-card__title {
    font-size: 1rem; font-weight: 600; margin-bottom: var(--space-2);
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
    min-height: 2.6em;
}
.price { font-weight: 700; color: var(--color-secondary); }
.price--sale { color: var(--color-accent); margin-right: var(--space-2); }
.price--old { font-weight: 400; text-decoration: line-through; color: var(--color-text-muted); font-size: 0.875rem; }
.price--contact { color: var(--color-primary); font-size: 0.9375rem; }

.category-card__image { aspect-ratio: 16/9; background: var(--color-bg-alt); }
.category-card__image img { width: 100%; height: 100%; object-fit: cover; }
.category-card__placeholder { width: 100%; height: 100%; background: var(--color-bg-alt); }
.category-card__body { padding: var(--space-4); }
.category-card__title { font-size: 1.0625rem; margin-bottom: var(--space-1); }
.category-card__count { font-size: 0.8125rem; color: var(--color-text-muted); }

.post-card__media { aspect-ratio: 16/9; }
.post-card__media img { width: 100%; height: 100%; object-fit: cover; }
.post-card__body { padding: var(--space-4); }
.post-card__date { font-size: 0.8125rem; color: var(--color-text-muted); }
.post-card__title { margin-top: var(--space-2); font-size: 1.0625rem; }

.solution-card, .why-us-card, .showcase-card {
    background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-lg);
    padding: var(--space-5); display: block;
}
.solution-card h3, .why-us-card h3 { margin-bottom: var(--space-2); font-size: 1.125rem; }
.solution-card p, .why-us-card p { color: var(--color-text-muted); font-size: 0.9375rem; }
.solution-card__link { display: inline-block; margin-top: var(--space-4); color: var(--color-primary); font-weight: 600; font-size: 0.875rem; }
.showcase-card img { border-radius: var(--radius-md); margin-bottom: var(--space-3); aspect-ratio: 16/9; object-fit: cover; }
.showcase-card h3 { font-size: 1rem; }

/* ==========================================================================
   Badges
   ========================================================================== */
.badge {
    display: inline-block; font-size: 0.75rem; font-weight: 600;
    padding: 4px 10px; border-radius: var(--radius-sm); letter-spacing: 0.02em;
}
.badge--accent { background: var(--color-accent); color: #fff; }

/* ==========================================================================
   CTA band
   ========================================================================== */
.cta-band { background: var(--color-secondary); color: #fff; padding-block: var(--space-8); text-align: center; }
.cta-band__inner { max-width: 640px; margin-inline: auto; }
.cta-band h2 { color: #fff; margin-bottom: var(--space-3); }
.cta-band p { color: rgba(255,255,255,.75); margin-bottom: var(--space-6); }

/* ==========================================================================
   Breadcrumb
   ========================================================================== */
.breadcrumb { font-size: 0.8125rem; color: var(--color-text-muted); margin-bottom: var(--space-5); }
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.breadcrumb li:not(:last-child)::after { content: '/'; margin-left: var(--space-2); color: var(--color-border); }
.breadcrumb a:hover { color: var(--color-primary); }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer { background: var(--color-secondary); color: rgba(255,255,255,.85); padding-block: var(--space-8) var(--space-5); }
.footer__grid { display: grid; gap: var(--space-6); grid-template-columns: 1fr; }
.footer__brand .site-logo__text--footer { color: #fff; font-size: 1.25rem; }
.footer__desc { margin-top: var(--space-3); color: rgba(255,255,255,.6); font-size: 0.9375rem; max-width: 40ch; }
.footer__col .footer-heading { color: #fff; font-size: 0.9375rem; font-weight: 600; margin: 0 0 var(--space-4); }
.footer__col li { margin-bottom: var(--space-2); }
.footer__col a { color: rgba(255,255,255,.7); font-size: 0.9375rem; }
.footer__col a:hover { color: #fff; }
.footer__bottom {
    margin-top: var(--space-7); padding-top: var(--space-5); border-top: 1px solid rgba(255,255,255,.12);
    display: flex; flex-direction: column; gap: var(--space-3); font-size: 0.8125rem; color: rgba(255,255,255,.55);
}
.footer-menu { display: flex; gap: var(--space-4); }

@media (min-width: 768px) {
    .footer__grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
    .footer__bottom { flex-direction: row; justify-content: space-between; }
}

/* ==========================================================================
   Category archive
   ========================================================================== */
.category-header { max-width: 720px; margin-bottom: var(--space-5); }
.category-header__desc { color: var(--color-text-muted); margin-top: var(--space-3); }
.category-header__count { color: var(--color-text-muted); font-size: 0.875rem; margin-top: var(--space-2); }

.subcategory-row { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-6); }
.subcategory-pill {
    display: inline-block; padding: 8px 16px; border: 1px solid var(--color-border);
    border-radius: 999px; font-size: 0.875rem; font-weight: 500; transition: all .15s ease;
}
.subcategory-pill:hover { border-color: var(--color-primary); color: var(--color-primary); }

.category-toolbar {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: var(--space-5); padding-bottom: var(--space-4); border-bottom: 1px solid var(--color-border);
    flex-wrap: wrap; gap: var(--space-3);
}
.category-toolbar__result { font-size: 0.875rem; color: var(--color-text-muted); }
.category-toolbar__sort { display: flex; align-items: center; gap: var(--space-2); font-size: 0.875rem; }
.category-toolbar__sort select { padding: 8px 12px; border: 1px solid var(--color-border); border-radius: var(--radius-md); }

.category-empty { padding: var(--space-6); text-align: center; background: var(--color-bg-alt); border-radius: var(--radius-lg); color: var(--color-text-muted); }

.pagination { display: flex; gap: var(--space-2); justify-content: center; margin-top: var(--space-7); }
.pagination .page-numbers {
    display: inline-flex; align-items: center; justify-content: center;
    min-width: 40px; height: 40px; padding: 0 8px; border: 1px solid var(--color-border);
    border-radius: var(--radius-md); font-size: 0.875rem; font-weight: 500;
}
.pagination .page-numbers.current { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.pagination .page-numbers:hover:not(.current) { border-color: var(--color-primary); color: var(--color-primary); }

/* ==========================================================================
   Product detail
   ========================================================================== */
.product-detail { display: grid; gap: var(--space-6); margin-bottom: var(--space-8); }
.product-detail__main-image { aspect-ratio: 1/1; background: var(--color-bg-alt); border-radius: var(--radius-lg); overflow: hidden; }
.product-detail__main-image img { width: 100%; height: 100%; object-fit: cover; }
.product-detail__thumbs { display: flex; gap: var(--space-2); margin-top: var(--space-3); flex-wrap: wrap; }
.product-detail__thumb-btn {
    padding: 0; background: none; border: 2px solid var(--color-border); border-radius: var(--radius-md);
    cursor: pointer; line-height: 0; transition: border-color .15s ease;
}
.product-detail__thumb-btn:hover { border-color: var(--color-accent); }
.product-detail__thumb-btn.is-active { border-color: var(--color-primary); }
.product-detail__thumb { width: 72px; height: 72px; object-fit: cover; border-radius: calc(var(--radius-md) - 2px); display: block; }

.product-detail__sku { color: var(--color-text-muted); font-size: 0.875rem; margin-top: var(--space-2); }
.product-detail__price { margin-top: var(--space-4); }
.price--lg { font-size: 1.5rem; }
.product-detail__brief { color: var(--color-text-muted); margin-top: var(--space-4); }
.product-detail__actions { display: flex; gap: var(--space-3); margin-top: var(--space-6); flex-wrap: wrap; }

.spec-table { width: 100%; margin-top: var(--space-6); border-collapse: collapse; }
.spec-table th, .spec-table td { text-align: left; padding: var(--space-3) 0; border-bottom: 1px solid var(--color-border); font-size: 0.9375rem; }
.spec-table th { color: var(--color-text-muted); font-weight: 500; width: 40%; }
.spec-table td { font-weight: 500; }

.product-detail__description { max-width: 820px; margin-bottom: var(--space-8); }
.product-detail__description h2 { margin-bottom: var(--space-4); }

@media (min-width: 1024px) {
    .product-detail { grid-template-columns: 1.1fr 1fr; }
}

/* ==========================================================================
   Utility
   ========================================================================== */
.container { width: 100%; }