/**
 * ShopViet - Main Stylesheet
 * @author THIETBISO
 * @version 1.0.0
 * Color: Red #DC2626 + White
 * Font: Be Vietnam Pro
 */

/* ========== CSS Variables ========== */
:root {
    --primary: #DC2626;
    --primary-dark: #B91C1C;
    --primary-light: #FEE2E2;
    --secondary: #1F2937;
    --text: #374151;
    --text-light: #6B7280;
    --text-dark: #111827;
    --bg: #FFFFFF;
    --bg-light: #F9FAFB;
    --bg-gray: #F3F4F6;
    --border: #E5E7EB;
    --border-light: #F3F4F6;
    --success: #059669;
    --warning: #D97706;
    --info: #2563EB;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --radius: 8px;
    --radius-sm: 4px;
    --radius-lg: 12px;
    --font: 'Be Vietnam Pro', sans-serif;
    --container: 1280px;
    --header-h: 60px;
    --transition: 0.2s ease;
}

/* ========== Reset ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { font-family: var(--font); font-size: 15px; line-height: 1.6; color: var(--text); background: var(--bg); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary); }
img { max-width: 100%; height: auto; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul, ol { list-style: none; }
input, textarea, select { font-family: inherit; font-size: inherit; }

/* ========== Utilities ========== */
.container { max-width: var(--container); margin: 0 auto; padding: 0 16px; }
.section { padding: 32px 0; }
.section-title { font-size: 1.4rem; font-weight: 700; color: var(--text-dark); margin-bottom: 10px; }
.section-subtitle { color: var(--text-light); margin-bottom: 24px; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 24px; border-radius: var(--radius); font-weight: 600; font-size: 14px; transition: all var(--transition); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-outline { border: 2px solid var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-sm { padding: 6px 16px; font-size: 13px; }
.btn-lg { padding: 14px 32px; font-size: 16px; }
.text-primary { color: var(--primary); }
.text-center { text-align: center; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 99px; font-size: 11px; font-weight: 600; }
.badge-sale { background: var(--primary); color: #fff; }
.badge-new { background: var(--success); color: #fff; }

/* ========== Header ========== */
.header { position: sticky; top: 0; z-index: 1000; background: var(--bg); box-shadow: var(--shadow); }
.header-top { background: var(--secondary); color: #fff; font-size: 13px; padding: 6px 0; }
.header-top-inner { display: flex; justify-content: space-between; align-items: center; }
.header-contact { display: flex; gap: 20px; }
.header-contact a { display: flex; align-items: center; gap: 6px; color: #fff; opacity: 0.9; }
.header-contact a:hover { opacity: 1; color: #fff; }
.header-social { display: flex; align-items: center; gap: 12px; }
.header-social a { color: #fff; opacity: 0.8; }
.header-social a:hover { opacity: 1; }
.header-hours { display: flex; align-items: center; gap: 5px; color: #fff; opacity: 0.9; font-size: 13px; }

.header-main { padding: 12px 0; }
.header-main-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; }

/* Logo */
.logo { font-size: 1.6rem; font-weight: 700; white-space: nowrap; }
.logo-accent { color: var(--primary); }

/* Search */
.header-search { flex: 1; max-width: 600px; margin: 0 auto; }
.search-wrapper { position: relative; }
.search-wrapper input { width: 100%; padding: 10px 48px 10px 16px; border: 2px solid var(--border); border-radius: var(--radius); font-size: 14px; transition: border-color var(--transition); }
.search-wrapper input:focus { outline: none; border-color: var(--primary); }
.search-btn { position: absolute; right: 4px; top: 50%; transform: translateY(-50%); width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; background: var(--primary); color: #fff; border-radius: var(--radius-sm); }
.search-dropdown { position: absolute; top: calc(100% + 4px); left: 0; right: 0; background: var(--bg); border-radius: var(--radius); box-shadow: var(--shadow-lg); border: 1px solid var(--border); max-height: 480px; overflow-y: auto; display: none; z-index: 100; }
.search-dropdown.active { display: block; }
.search-section { padding: 8px 0; border-bottom: 1px solid var(--border-light); }
.search-section:last-child { border-bottom: none; }
.search-section-title { padding: 4px 16px; font-size: 11px; font-weight: 700; text-transform: uppercase; color: var(--text-light); letter-spacing: 0.5px; }
.search-item { display: flex; align-items: center; gap: 12px; padding: 8px 16px; transition: background var(--transition); }
.search-item:hover, .search-item-active { background: var(--bg-light); }
.search-item-img { width: 40px; height: 40px; border-radius: var(--radius-sm); overflow: hidden; background: var(--bg-gray); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.search-item-img img { width: 100%; height: 100%; object-fit: cover; }
.search-item-name { font-size: 14px; font-weight: 500; }
.search-item-name mark { background: var(--primary-light); color: var(--primary); padding: 0 2px; border-radius: 2px; }
.search-item-price { font-size: 13px; color: var(--primary); font-weight: 600; }
.search-item-count { font-size: 12px; color: var(--text-light); margin-left: auto; }
.search-news-icon, .search-cat-icon { font-size: 18px; }
.search-view-all { display: block; padding: 12px 16px; text-align: center; font-size: 14px; font-weight: 600; color: var(--primary); border-top: 1px solid var(--border-light); }
.search-view-all:hover { background: var(--primary-light); }
.search-empty { padding: 32px 16px; text-align: center; color: var(--text-light); }
.search-empty span { font-size: 32px; display: block; margin-bottom: 8px; }

/* Header Actions */
.header-actions { display: flex; align-items: center; gap: 16px; }
.header-cart { position: relative; padding: 8px; }
.cart-count { position: absolute; top: 0; right: 0; width: 18px; height: 18px; background: var(--primary); color: #fff; border-radius: 50%; font-size: 11px; font-weight: 700; display: flex; align-items: center; justify-content: center; }

/* Mobile Menu Toggle */
.mobile-menu-toggle { display: none; width: 32px; height: 24px; flex-direction: column; justify-content: space-between; padding: 2px 0; }
.mobile-menu-toggle span { display: block; width: 100%; height: 3px; background: var(--text-dark); border-radius: 2px; transition: all var(--transition); }
.mobile-menu-toggle.active span:nth-child(1) { transform: translateY(10px) rotate(45deg); }
.mobile-menu-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-menu-toggle.active span:nth-child(3) { transform: translateY(-10px) rotate(-45deg); }

/* Navigation */
.header-nav { background: var(--bg); border-top: 1px solid var(--border-light); }
.nav-inner { display: flex; align-items: center; gap: 0; }
.nav-categories { position: relative; }
.nav-cat-btn { display: flex; align-items: center; gap: 8px; padding: 12px 20px; background: var(--primary); color: #fff; font-weight: 600; font-size: 14px; border-radius: var(--radius) var(--radius) 0 0; white-space: nowrap; }
.nav-cat-btn:hover { background: var(--primary-dark); }

/* Mega Menu */
.mega-menu { position: absolute; top: 100%; left: 0; width: 280px; background: var(--bg); border: 1px solid var(--border); border-top: 3px solid var(--primary); border-radius: 0 0 var(--radius) var(--radius); box-shadow: var(--shadow-lg); z-index: 100; }

/* Nav Links */
.nav-links { display: flex; align-items: center; gap: 0; flex: 1; }
.nav-links li a { display: block; padding: 12px 16px; font-size: 14px; font-weight: 500; color: var(--text); transition: color var(--transition); }
.nav-links li a:hover, .nav-links li a.active { color: var(--primary); }

/* Submenu (mobile category dropdown) */
.nav-submenu-trigger { display: flex; align-items: center; }
.nav-submenu-trigger a { flex: 1; }
.nav-submenu-toggle { display: none; }
.nav-submenu { list-style: none; padding: 0; margin: 0; }
.nav-hotline { display: flex; align-items: center; gap: 6px; font-weight: 700; color: var(--primary); font-size: 15px; margin-left: auto; white-space: nowrap; }

/* ========== Vertical Menu ========== */
.vmenu-list { padding: 8px 0; }
.vmenu-item { position: relative; }
.vmenu-link { display: flex; align-items: center; gap: 10px; padding: 10px 16px; font-size: 14px; color: var(--text); transition: all var(--transition); }
.vmenu-link:hover { background: var(--bg-light); color: var(--primary); }
.vmenu-icon { font-size: 18px; width: 24px; text-align: center; }
.vmenu-name { flex: 1; font-weight: 500; }
.vmenu-count { font-size: 12px; color: var(--text-light); }
.vmenu-arrow { margin-left: auto; opacity: 0.5; }

/* Submenu */
.vmenu-sub { position: absolute; top: 0; left: 100%; width: 300px; background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow-lg); padding: 16px; display: none; z-index: 10; }
.vmenu-item:hover .vmenu-sub { display: block; }
.vmenu-sub-title { font-size: 14px; font-weight: 700; color: var(--primary); margin-bottom: 12px; padding-bottom: 8px; border-bottom: 1px solid var(--border-light); }
.vmenu-sub-list li a { display: block; padding: 6px 0; font-size: 13px; color: var(--text); }
.vmenu-sub-list li a:hover { color: var(--primary); }

/* ========== Flash Message ========== */
.flash-message { padding: 12px 0; font-size: 14px; font-weight: 500; }
.flash-message .container { display: flex; align-items: center; justify-content: space-between; }
.flash-success { background: #D1FAE5; color: #065F46; }
.flash-error { background: #FEE2E2; color: #991B1B; }
.flash-warning { background: #FEF3C7; color: #92400E; }
.flash-close { font-size: 20px; opacity: 0.6; }

/* ========== Breadcrumb ========== */
.breadcrumb { padding: 12px 0; background: var(--bg-light); border-bottom: 1px solid var(--border-light); }
.breadcrumb-list { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; font-size: 13px; }
.breadcrumb-item + .breadcrumb-item::before { content: '/'; margin-right: 4px; color: var(--text-light); }
.breadcrumb-item a { color: var(--text-light); }
.breadcrumb-item a:hover { color: var(--primary); }
.breadcrumb-item:last-child { color: var(--text-dark); font-weight: 500; }

/* ========== Product Grid ========== */
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.product-grid-5 { grid-template-columns: repeat(5, 1fr); }
.product-card { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: all var(--transition); position: relative; }
.product-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); border-color: var(--primary); }
.product-card-img { aspect-ratio: 1; overflow: hidden; background: var(--bg-gray); }
.product-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.3s; }
.product-card:hover .product-card-img img { transform: scale(1.05); }
.product-card-badge { position: absolute; top: 10px; left: 10px; z-index: 2; }
.product-card-body { padding: 12px; }
.product-card-cat { font-size: 12px; color: var(--text-light); margin-bottom: 4px; }
.product-card-name { font-size: 14px; font-weight: 600; color: var(--text-dark); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; min-height: 42px; margin-bottom: 8px; }
.product-card-name:hover { color: var(--primary); }
.product-card-price { display: flex; align-items: center; gap: 8px; }
.price-current { font-size: 16px; font-weight: 700; color: var(--primary); }
.price-old { font-size: 13px; color: var(--text-light); text-decoration: line-through; }
.price-percent { font-size: 12px; font-weight: 600; color: #fff; background: var(--primary); padding: 1px 6px; border-radius: 3px; }
.product-card-footer { padding: 8px 12px; border-top: 1px solid var(--border-light); display: flex; align-items: center; justify-content: space-between; }
.product-card-rating { display: flex; gap: 2px; color: #F59E0B; font-size: 12px; }
.product-card-btn { padding: 6px 12px; background: var(--primary); color: #fff; border-radius: var(--radius-sm); font-size: 12px; font-weight: 600; }
.product-card-btn:hover { background: var(--primary-dark); color: #fff; }

/* ========== News Grid ========== */
.news-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 24px; }
.news-card { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: all var(--transition); }
.news-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.news-card-img { aspect-ratio: 16/9; overflow: hidden; background: var(--bg-gray); }
.news-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.3s; }
.news-card:hover .news-card-img img { transform: scale(1.05); }
.news-card-body { padding: 16px; }
.news-card-meta { display: flex; align-items: center; gap: 12px; font-size: 12px; color: var(--text-light); margin-bottom: 8px; }
.news-card-title { font-size: 16px; font-weight: 600; color: var(--text-dark); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 8px; }
.news-card-title:hover { color: var(--primary); }
.news-card-excerpt { font-size: 13px; color: var(--text-light); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }

/* ========== Category Cards ========== */
.category-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 20px; }
.category-card { text-align: center; padding: 20px 12px; background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); transition: all var(--transition); }
.category-card:hover { border-color: var(--primary); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.category-card-icon { font-size: 36px; margin-bottom: 8px; }
.category-card-name { font-size: 13px; font-weight: 600; color: var(--text-dark); }
.category-card-count { font-size: 12px; color: var(--text-light); }

/* ========== Hero Section ========== */
.hero { padding: 20px 0 12px; }
.hero img { transition: transform 0.3s; }
.hero a:hover img { transform: scale(1.01); }

/* ========== Trust Badges ========== */
.trust-badges-section { padding: 28px 0; }
.trust-badges-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}
.trust-badge-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 20px 24px;
    position: relative;
    transition: background 0.2s;
}
.trust-badge-item:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 20%;
    height: 60%;
    width: 1px;
    background: var(--border);
}
.trust-badge-item:hover { background: var(--bg-light); }
.trust-badge-icon {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, #FEF2F2 0%, #FEE2E2 100%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    flex-shrink: 0;
}
.trust-badge-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1.3;
}
.trust-badge-subtitle {
    font-size: 12px;
    color: var(--text-light);
    margin-top: 2px;
}
@media (max-width: 1024px) {
    .trust-badges-bar { grid-template-columns: repeat(2, 1fr); }
    .trust-badge-item:nth-child(2)::after { display: none; }
    .trust-badge-item:nth-child(1),
    .trust-badge-item:nth-child(2) { border-bottom: 1px solid var(--border); }
}
@media (max-width: 640px) {
    .trust-badges-bar { grid-template-columns: 1fr; }
    .trust-badge-item::after { display: none !important; }
    .trust-badge-item:not(:last-child) { border-bottom: 1px solid var(--border); }
    .trust-badge-item { padding: 14px 20px; }
}

/* ========== Services ========== */
.service-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 24px; }
.service-card { padding: 24px; background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); transition: all var(--transition); }
.service-card:hover { border-color: var(--primary); box-shadow: var(--shadow-md); }
.service-card-icon { width: 48px; height: 48px; background: var(--primary-light); color: var(--primary); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; font-size: 24px; margin-bottom: 16px; }
.service-card-title { font-size: 16px; font-weight: 700; color: var(--text-dark); margin-bottom: 8px; }
.service-card-desc { font-size: 14px; color: var(--text-light); }
.service-card-price { margin-top: 12px; font-size: 15px; font-weight: 700; color: var(--primary); }

/* ========== Projects ========== */
.project-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 24px; }
.project-card { position: relative; border-radius: var(--radius); overflow: hidden; }
.project-card-img { aspect-ratio: 4/3; }
.project-card-img img { width: 100%; height: 100%; object-fit: cover; }
.project-card-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 60%); display: flex; align-items: flex-end; padding: 20px; opacity: 0; transition: opacity 0.3s; }
.project-card:hover .project-card-overlay { opacity: 1; }
.project-card-info { color: #fff; }
.project-card-title { font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.project-card-client { font-size: 13px; opacity: 0.8; }

/* ========== Product Detail ========== */
.product-detail { padding: 32px 0; }
.product-detail-grid { display: grid; grid-template-columns: 5fr 7fr; gap: 40px; align-items: start; }
.product-gallery { position: sticky; top: 100px; max-width: 460px; }
.product-gallery-main { aspect-ratio: 1; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border); margin-bottom: 12px; background: var(--bg-gray); }
.product-gallery-main img { width: 100%; height: 100%; object-fit: contain; }
.product-gallery-thumbs { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; }
.product-gallery-thumb { aspect-ratio: 1; border-radius: var(--radius-sm); overflow: hidden; border: 2px solid var(--border); cursor: pointer; transition: all var(--transition); background: var(--bg-gray); }
.product-gallery-thumb.active, .product-gallery-thumb:hover { border-color: var(--primary); box-shadow: 0 0 0 1px var(--primary); }
.product-gallery-thumb img { width: 100%; height: 100%; object-fit: contain; }

/* Lightbox */
.lightbox-overlay { position: fixed; inset: 0; z-index: 9999; display: flex; align-items: center; justify-content: center; }
.lightbox-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,.92); }
.lightbox-content { position: relative; width: 90vw; max-width: 900px; max-height: 90vh; display: flex; align-items: center; justify-content: center; }
.lightbox-image { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; }
.lightbox-image img { max-width: 100%; max-height: 85vh; object-fit: contain; border-radius: 8px; user-select: none; }
.lightbox-close { position: absolute; top: -40px; right: 0; width: 36px; height: 36px; background: rgba(255,255,255,.15); border: none; border-radius: 50%; color: #fff; font-size: 24px; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: background .2s; }
.lightbox-close:hover { background: rgba(255,255,255,.3); }
.lightbox-prev, .lightbox-next { position: absolute; top: 50%; transform: translateY(-50%); width: 44px; height: 44px; background: rgba(255,255,255,.15); border: none; border-radius: 50%; color: #fff; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: background .2s; backdrop-filter: blur(4px); }
.lightbox-prev:hover, .lightbox-next:hover { background: rgba(255,255,255,.3); }
.lightbox-prev { left: -60px; }
.lightbox-next { right: -60px; }
.lightbox-counter { position: absolute; bottom: -36px; left: 50%; transform: translateX(-50%); color: rgba(255,255,255,.8); font-size: 14px; font-weight: 500; }
@media (max-width: 768px) {
    .lightbox-prev { left: 8px; }
    .lightbox-next { right: 8px; }
    .lightbox-close { top: 8px; right: 8px; }
    .lightbox-counter { bottom: 12px; }
}

.product-info-title { font-size: 1.6rem; font-weight: 700; color: var(--text-dark); margin-bottom: 8px; line-height: 1.3; }
.product-info-sku { font-size: 13px; color: var(--text-light); margin-bottom: 16px; }
.product-info-price { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; padding: 16px; background: var(--primary-light); border-radius: var(--radius); }
.product-info-price .price-current { font-size: 1.75rem; }
.product-info-desc { font-size: 14px; color: var(--text); margin-bottom: 24px; padding-bottom: 24px; border-bottom: 1px solid var(--border-light); }
.product-info-attrs { margin-bottom: 24px; }
.product-attr-row { display: flex; padding: 8px 0; border-bottom: 1px solid var(--border-light); font-size: 14px; }
.product-attr-label { width: 140px; color: var(--text-light); flex-shrink: 0; }
.product-attr-value { font-weight: 500; color: var(--text-dark); }
.product-quantity { display: flex; align-items: center; gap: 16px; margin-bottom: 20px; }
.qty-control { display: flex; align-items: center; border: 2px solid var(--border); border-radius: var(--radius-sm); }
.qty-control button { width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; font-size: 18px; font-weight: 700; color: var(--text-dark); transition: background var(--transition); }
.qty-control button:hover { background: var(--bg-light); }
.qty-control input { width: 56px; height: 40px; text-align: center; border: none; border-left: 2px solid var(--border); border-right: 2px solid var(--border); font-weight: 700; font-size: 15px; }
.product-actions { display: flex; gap: 12px; margin-bottom: 24px; }

/* Product Tabs */
.product-tabs { margin-top: 48px; }
.tabs-nav { display: flex; border-bottom: 2px solid var(--border); gap: 0; }
.tabs-nav button { padding: 12px 24px; font-size: 14px; font-weight: 600; color: var(--text-light); border-bottom: 2px solid transparent; margin-bottom: -2px; transition: all var(--transition); }
.tabs-nav button.active, .tabs-nav button:hover { color: var(--primary); border-bottom-color: var(--primary); }
.tab-content { padding: 24px 0; }
.tab-content.active { display: block; }
.tab-content h2, .tab-content h3 { color: var(--text-dark); margin: 16px 0 8px; }
.tab-content p { margin-bottom: 12px; }
.tab-content ul, .tab-content ol { margin-bottom: 12px; padding-left: 20px; }
.tab-content li { margin-bottom: 6px; }

/* ========== Table of Contents ========== */
.toc { background: var(--bg-light); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 24px; margin-bottom: 32px; }
.toc-title { font-size: 16px; font-weight: 700; color: var(--text-dark); margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.toc-list { counter-reset: toc; }
.toc-list li { counter-increment: toc; margin-bottom: 6px; }
.toc-list li::before { content: counter(toc) "."; font-weight: 600; color: var(--primary); margin-right: 6px; }
.toc-list li a { font-size: 14px; color: var(--text); }
.toc-list li a:hover { color: var(--primary); }
.toc-list .toc-h3 { margin-left: 20px; }
.toc-list .toc-h4 { margin-left: 40px; }

/* ========== Article Content ========== */
.article-content { font-size: 15px; line-height: 1.8; color: var(--text); }
.article-content h2 { font-size: 1.4rem; font-weight: 700; color: var(--text-dark); margin: 32px 0 12px; padding-top: 16px; border-top: 1px solid var(--border-light); }
.article-content h3 { font-size: 1.2rem; font-weight: 600; color: var(--text-dark); margin: 24px 0 8px; }
.article-content h4 { font-size: 1.05rem; font-weight: 600; color: var(--text-dark); margin: 16px 0 8px; }
.article-content p { margin-bottom: 16px; }
.article-content img { border-radius: var(--radius); margin: 16px 0; }
.article-content ul, .article-content ol { margin-bottom: 16px; padding-left: 24px; }
.article-content li { margin-bottom: 8px; }
.article-content blockquote { margin: 16px 0; padding: 16px 20px; border-left: 4px solid var(--primary); background: var(--bg-light); border-radius: 0 var(--radius) var(--radius) 0; font-style: italic; }
.article-content code { background: var(--bg-gray); padding: 2px 6px; border-radius: 3px; font-size: 13px; }
.article-content pre { background: var(--secondary); color: #fff; padding: 16px; border-radius: var(--radius); overflow-x: auto; margin: 16px 0; }
.article-content table { width: 100%; border-collapse: collapse; margin: 16px 0; }
.article-content th, .article-content td { padding: 10px 12px; border: 1px solid var(--border); text-align: left; }
.article-content th { background: var(--bg-light); font-weight: 600; }

/* ========== Reviews ========== */
.review-item { padding: 16px 0; border-bottom: 1px solid var(--border-light); }
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.review-avatar { width: 40px; height: 40px; background: var(--primary-light); color: var(--primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 16px; }
.review-name { font-weight: 600; color: var(--text-dark); }
.review-date { font-size: 12px; color: var(--text-light); }
.review-stars { color: #F59E0B; font-size: 14px; margin-bottom: 8px; }
.review-content { font-size: 14px; color: var(--text); }
.review-reply { margin-top: 12px; padding: 12px; background: var(--bg-light); border-radius: var(--radius-sm); border-left: 3px solid var(--primary); }
.review-reply-label { font-size: 12px; font-weight: 700; color: var(--primary); margin-bottom: 4px; }

/* ========== Pagination ========== */
.pagination { display: flex; align-items: center; justify-content: center; gap: 12px; margin-top: 32px; flex-wrap: wrap; }
.pagination-info { font-size: 13px; color: var(--text-light); font-weight: 500; white-space: nowrap; }
.pagination-btns { display: flex; align-items: center; gap: 4px; }
.page-btn { display: flex; align-items: center; justify-content: center; min-width: 36px; height: 36px; padding: 0 4px; border-radius: var(--radius-sm); font-size: 14px; font-weight: 500; border: 1px solid var(--border); color: var(--text); transition: all var(--transition); text-decoration: none; }
.page-btn:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
.page-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.page-btn.active:hover { color: #fff; }
/* Old pagination compat */
.pagination a, .pagination span { display: flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: var(--radius-sm); font-size: 14px; font-weight: 500; border: 1px solid var(--border); color: var(--text); transition: all var(--transition); }
.pagination a:hover { border-color: var(--primary); color: var(--primary); }
.pagination .active { background: var(--primary); color: #fff; border-color: var(--primary); }
.pagination .dots { border: none; }

/* ========== Forms ========== */
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 14px; font-weight: 500; color: var(--text-dark); margin-bottom: 6px; }
.form-control { width: 100%; padding: 10px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm); font-size: 14px; transition: border-color var(--transition); }
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); }
textarea.form-control { min-height: 120px; resize: vertical; }
.form-error { font-size: 12px; color: var(--primary); margin-top: 4px; }

/* ========== Cart ========== */
.cart-grid { display: grid; grid-template-columns: 1fr 360px; gap: 32px; }
.cart-table { width: 100%; border-collapse: collapse; }
.cart-table th { padding: 12px; font-size: 13px; font-weight: 600; text-align: left; border-bottom: 2px solid var(--border); color: var(--text-light); text-transform: uppercase; }
.cart-table td { padding: 16px 12px; border-bottom: 1px solid var(--border-light); vertical-align: middle; }
.cart-product { display: flex; align-items: center; gap: 12px; }
.cart-product-img { width: 60px; height: 60px; border-radius: var(--radius-sm); overflow: hidden; }
.cart-product-img img { width: 100%; height: 100%; object-fit: cover; }
.cart-product-name { font-size: 14px; font-weight: 500; }
.cart-summary { background: var(--bg-light); border-radius: var(--radius); padding: 24px; }
.cart-summary-row { display: flex; justify-content: space-between; padding: 8px 0; font-size: 14px; }
.cart-summary-total { font-size: 18px; font-weight: 700; color: var(--primary); border-top: 2px solid var(--border); padding-top: 12px; margin-top: 8px; }

/* ========== Contact ========== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info-item { display: flex; gap: 12px; margin-bottom: 20px; }
.contact-info-icon { width: 40px; height: 40px; background: var(--primary-light); color: var(--primary); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.contact-info-label { font-size: 13px; color: var(--text-light); }
.contact-info-value { font-weight: 600; color: var(--text-dark); }

/* ========== Newsletter ========== */
.newsletter { background: var(--primary); padding: 20px 0; color: #fff; text-align: center; }
.newsletter-title { font-size: 1rem; font-weight: 700; margin-bottom: 4px; }
.newsletter-subtitle { opacity: 0.9; margin-bottom: 12px; font-size: 13px; }
.newsletter-form { display: flex; max-width: 420px; margin: 0 auto; gap: 6px; }
.newsletter-form input { flex: 1; padding: 9px 14px; border-radius: var(--radius); border: none; font-size: 13px; }
.newsletter-form button { padding: 9px 20px; background: var(--secondary); color: #fff; border-radius: var(--radius); font-weight: 600; font-size: 13px; white-space: nowrap; }

/* ========== Footer ========== */
.footer { background: var(--secondary); color: #D1D5DB; }
.footer-main { padding: 48px 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 32px; }
.footer-logo { font-size: 1.4rem; font-weight: 700; color: #fff; display: inline-block; margin-bottom: 12px; }
.footer-logo span { color: var(--primary); }
.footer-desc { font-size: 14px; margin-bottom: 16px; opacity: 0.8; }
.footer-address { display: flex; gap: 8px; font-size: 13px; opacity: 0.7; }
.footer-company-name { font-size: 13px; font-weight: 700; color: #fff; text-transform: uppercase; margin-bottom: 10px; letter-spacing: 0.3px; line-height: 1.4; }
.footer-company-info { list-style: none; padding: 0; margin: 0; }
.footer-company-info li { display: flex; align-items: flex-start; gap: 8px; font-size: 12.5px; margin-bottom: 7px; opacity: 0.75; line-height: 1.5; }
.footer-company-info li svg { flex-shrink: 0; margin-top: 2px; opacity: 0.7; }
.footer-company-info li a:hover { color: var(--primary); opacity: 1; }
.footer-col-company { max-width: 320px; }
.footer-title { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer-links li { margin-bottom: 8px; }
.footer-links li a { font-size: 14px; opacity: 0.8; transition: opacity var(--transition); }
.footer-links li a:hover { opacity: 1; color: var(--primary); }
.footer-contact li { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; font-size: 14px; }
.footer-contact li a { opacity: 0.8; }
.footer-contact li a:hover { opacity: 1; color: var(--primary); }
.footer-social { display: flex; gap: 10px; margin-top: 16px; }
.social-link { width: 36px; height: 36px; background: rgba(255,255,255,0.1); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 13px; font-weight: 600; transition: background var(--transition); }
.social-link:hover { background: var(--primary); color: #fff; }
.footer-bottom { padding: 16px 0; border-top: 1px solid rgba(255,255,255,0.1); text-align: center; font-size: 13px; opacity: 0.7; }

/* ========== Floating Buttons ========== */
.floating-buttons { position: fixed; bottom: 24px; right: 24px; display: flex; flex-direction: column; gap: 10px; z-index: 999; }
.float-btn { width: 48px; height: 48px; border-radius: 50%; display: flex; align-items: center; justify-content: center; color: #fff; box-shadow: var(--shadow-lg); transition: transform var(--transition); }
.float-btn:hover { transform: scale(1.1); color: #fff; }
.float-phone { background: var(--primary); }
.float-zalo { background: #0068FF; }
.float-top { background: var(--secondary); }

/* ========== Sidebar ========== */
.layout-sidebar { display: grid; grid-template-columns: 280px 1fr; gap: 32px; }
.sidebar { position: sticky; top: 80px; align-self: start; max-height: calc(100vh - 100px); overflow-y: auto; scrollbar-width: thin; }
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-thumb { background: #cbd5e0; border-radius: 4px; }
.sidebar-toggle { display: none; align-items: center; gap: 6px; padding: 8px 16px; background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-sm); font-size: 14px; font-weight: 600; color: var(--text-dark); cursor: pointer; margin-bottom: 16px; }
.sidebar-toggle.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.sidebar-widget { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; margin-bottom: 20px; }
.sidebar-title { font-size: 15px; font-weight: 700; color: var(--text-dark); margin-bottom: 12px; padding-bottom: 8px; border-bottom: 2px solid var(--primary); }
.sidebar-filter label { display: flex; align-items: center; gap: 8px; padding: 6px 0; font-size: 14px; cursor: pointer; }
.sidebar-filter input[type="checkbox"] { accent-color: var(--primary); }

/* === Price Range Slider === */
.price-filter { padding-top: 4px; }
.price-slider-container { position: relative; width: 100%; height: 40px; }
.price-slider-track { position: absolute; top: 50%; left: 0; right: 0; height: 6px; background: #e2e8f0; border-radius: 3px; transform: translateY(-50%); pointer-events: none; z-index: 1; }
.price-slider-range { position: absolute; top: 0; height: 100%; background: linear-gradient(135deg, var(--primary), var(--primary-dark, #c0392b)); border-radius: 3px; }
.price-slider-input { position: absolute; top: 50%; transform: translateY(-50%); width: 100%; appearance: none; -webkit-appearance: none; background: transparent; pointer-events: none; margin: 0; height: 0; z-index: 3; }
.price-slider-input:first-of-type { z-index: 4; }
.price-slider-input::-webkit-slider-thumb { -webkit-appearance: none; width: 24px; height: 24px; border-radius: 50%; background: #fff; border: 3px solid var(--primary); cursor: grab; pointer-events: auto; box-shadow: 0 2px 6px rgba(0,0,0,.15); transition: transform .15s, box-shadow .15s; position: relative; z-index: 5; }
.price-slider-input::-webkit-slider-thumb:hover { transform: scale(1.2); box-shadow: 0 2px 10px rgba(220,38,38,.3); }
.price-slider-input::-webkit-slider-thumb:active { cursor: grabbing; transform: scale(1.25); box-shadow: 0 2px 12px rgba(220,38,38,.4); }
.price-slider-input::-moz-range-thumb { width: 24px; height: 24px; border-radius: 50%; background: #fff; border: 3px solid var(--primary); cursor: grab; pointer-events: auto; box-shadow: 0 2px 6px rgba(0,0,0,.15); }
.price-slider-input::-moz-range-thumb:active { cursor: grabbing; }
.price-slider-input::-moz-range-thumb { width: 22px; height: 22px; border-radius: 50%; background: #fff; border: 3px solid var(--primary); cursor: pointer; pointer-events: auto; box-shadow: 0 2px 6px rgba(0,0,0,.15); }
.price-display { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: 4px; }
.price-label { font-size: 13px; font-weight: 600; color: var(--primary); background: rgba(231,76,60,.08); padding: 3px 8px; border-radius: var(--radius-sm); }
.price-sep { font-size: 12px; color: var(--text-light); }
.btn-filter-apply { display: block; width: 100%; margin-top: 12px; padding: 8px; background: var(--primary); color: #fff; border: none; border-radius: var(--radius-sm); font-size: 13px; font-weight: 600; cursor: pointer; transition: background .2s; }
.btn-filter-apply:hover { background: var(--primary-dark, #c0392b); }

/* === Attribute Filters === */
.sidebar-title-toggle { display: flex; justify-content: space-between; align-items: center; cursor: pointer; user-select: none; }
.sidebar-title-toggle svg { transition: transform .2s; flex-shrink: 0; }
.sidebar-title-toggle svg.rotated { transform: rotate(180deg); }
.attr-filter-list { padding-top: 4px; max-height: 260px; overflow-y: auto; }
.attr-filter-list::-webkit-scrollbar { width: 4px; }
.attr-filter-list::-webkit-scrollbar-thumb { background: #cbd5e0; border-radius: 4px; }
.attr-filter-item { display: flex; align-items: center; gap: 8px; padding: 5px 0; font-size: 13.5px; cursor: pointer; color: var(--text); transition: color .15s; }
.attr-filter-item:hover { color: var(--primary); }
.attr-filter-item input[type="checkbox"] { display: none; }
.attr-filter-check { width: 18px; height: 18px; border: 2px solid #cbd5e0; border-radius: 4px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; transition: all .15s; }
.attr-filter-item input:checked ~ .attr-filter-check { background: var(--primary); border-color: var(--primary); }
.attr-filter-item input:checked ~ .attr-filter-check::after { content: ''; display: block; width: 5px; height: 9px; border: solid #fff; border-width: 0 2px 2px 0; transform: rotate(45deg) translateY(-1px); }
.attr-filter-label { flex: 1; line-height: 1.3; }
.attr-filter-count { font-size: 12px; color: var(--text-light); }

/* === Active Filter Tags === */
.active-filters-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; font-size: 13px; font-weight: 600; color: var(--text-dark); }
.clear-all-filters { font-size: 12px; font-weight: 500; color: var(--primary); text-decoration: none; }
.clear-all-filters:hover { text-decoration: underline; }
.active-filters-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.filter-tag { display: inline-flex; align-items: center; gap: 4px; padding: 4px 10px; background: rgba(231,76,60,.08); color: var(--primary); border: 1px solid rgba(231,76,60,.2); border-radius: 20px; font-size: 12px; font-weight: 500; }
.filter-tag button { background: none; border: none; color: var(--primary); cursor: pointer; font-size: 15px; line-height: 1; padding: 0 0 0 2px; opacity: .7; }
.filter-tag button:hover { opacity: 1; }

/* === Products Toolbar & Empty === */
.products-toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; flex-wrap: wrap; gap: 12px; }
.products-count { font-size: 14px; color: var(--text-light); }
.sort-select { padding: 8px 12px; border: 1px solid var(--border); border-radius: var(--radius-sm); font-size: 14px; background: var(--bg); cursor: pointer; }
.products-empty { text-align: center; padding: 48px 0; color: var(--text-light); }
.btn-reset-filter { display: inline-block; margin-top: 16px; padding: 10px 24px; background: var(--primary); color: #fff; text-decoration: none; border-radius: var(--radius-sm); font-size: 14px; font-weight: 600; }
.btn-reset-filter:hover { background: var(--primary-dark, #c0392b); }
.vmenu-link.active { color: var(--primary); font-weight: 600; }

/* ========== Responsive ========== */
@media (max-width: 1280px) {
    .product-grid-5 { grid-template-columns: repeat(4, 1fr); }
    .product-grid { grid-template-columns: repeat(3, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 1024px) {
    .layout-sidebar { grid-template-columns: 1fr; }
    .sidebar { position: static; display: none; }
    .sidebar.active { display: block; }
    .sidebar-toggle { display: flex; }
    .hero { padding: 8px 0 4px; }
    .product-detail-grid { grid-template-columns: 1fr; gap: 24px; }
    .product-gallery { position: static; max-width: 100%; }
    .contact-grid { grid-template-columns: 1fr; }
    .nav-categories { display: none; }
    .service-grid { grid-template-columns: repeat(3, 1fr); }
    .project-grid { grid-template-columns: repeat(3, 1fr); }
    .news-grid { grid-template-columns: repeat(3, 1fr); }
}

/* Mobile Overlay */
.mobile-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 998;
    opacity: 0;
    transition: opacity 0.3s;
}

/* Mobile Menu Header - hidden on desktop */
.mobile-menu-header { display: none; }
.mobile-overlay.active {
    display: block;
    opacity: 1;
}

@media (max-width: 768px) {
    :root { --header-h: 56px; }
    .header-top { display: block; }
    .header-search { max-width: none; }
    .mobile-menu-toggle { display: flex; }

    /* Slide-from-left panel */
    .header-nav {
        display: block !important;
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        width: 300px;
        max-width: 85vw;
        background: #fff;
        z-index: 999;
        transform: translateX(-100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        overflow-y: auto;
        box-shadow: 4px 0 20px rgba(0,0,0,0.15);
        padding-top: 0;
    }
    .header-nav.active {
        transform: translateX(0);
    }

    /* Mobile menu header with close button */
    .mobile-menu-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 14px 16px;
        background: linear-gradient(135deg, var(--primary), #b71c1c);
        color: #fff;
        position: sticky;
        top: 0;
        z-index: 10;
    }
    .mobile-menu-title {
        font-size: 16px;
        font-weight: 700;
        letter-spacing: 0.5px;
    }
    .mobile-menu-close {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 36px;
        height: 36px;
        background: rgba(255,255,255,0.2);
        border: none;
        border-radius: 50%;
        color: #fff;
        cursor: pointer;
        transition: background 0.2s;
    }
    .mobile-menu-close:active { background: rgba(255,255,255,0.35); }

    /* Menu content inside panel */
    .header-nav .container { padding: 0; }
    .nav-inner { flex-direction: column; align-items: stretch; padding: 0; }
    .nav-categories { display: none; }

    /* Nav links */
    .nav-links {
        flex-direction: column;
        padding: 0;
        margin: 0;
    }
    .nav-links > li > a,
    .nav-links > li > .nav-submenu-trigger > a {
        display: block;
        padding: 14px 18px;
        font-size: 15px;
        font-weight: 500;
        color: var(--text-dark);
        border-bottom: 1px solid #f0f0f0;
        text-decoration: none;
    }
    .nav-links > li > a.active,
    .nav-links > li > .nav-submenu-trigger > a.active {
        color: var(--primary);
    }

    /* Submenu toggle button - TO VÀ NỔI BẬT */
    .nav-submenu-trigger {
        display: flex;
        align-items: stretch;
        border-bottom: 1px solid #f0f0f0;
    }
    .nav-submenu-trigger > a {
        flex: 1;
        border-bottom: none !important;
    }
    .nav-submenu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 56px;
        min-height: 50px;
        background: linear-gradient(135deg, #e3f2fd, #bbdefb);
        border: none;
        border-left: 2px solid #90caf9;
        cursor: pointer;
        color: #1565c0;
        flex-shrink: 0;
        transition: all 0.25s;
        font-size: 0;
    }
    .nav-submenu-toggle svg {
        width: 20px;
        height: 20px;
    }
    .nav-submenu-toggle:active {
        background: linear-gradient(135deg, #90caf9, #64b5f6);
        color: #fff;
        transform: scale(0.93);
    }
    .nav-submenu-toggle svg { transition: transform 0.25s; }
    .nav-submenu-toggle svg.rotated { transform: rotate(180deg); }

    /* Submenu level 1 */
    .nav-submenu {
        list-style: none;
        padding: 0;
        margin: 0;
        background: #f8f9fa;
    }
    .nav-submenu > li { position: relative; }

    /* Child trigger wrapper */
    .nav-child-trigger {
        display: flex;
        align-items: stretch;
    }
    .nav-child-trigger > a {
        flex: 1;
        display: flex;
        align-items: center;
        gap: 10px;
        padding: 12px 16px 12px 24px;
        font-size: 14px;
        font-weight: 400;
        color: var(--text);
        border-bottom: 1px solid #eee;
        text-decoration: none;
        transition: color 0.2s, background 0.2s;
    }
    .nav-child-trigger > a:active {
        background: #e3f2fd;
        color: var(--primary);
    }
    .nav-submenu-icon { font-size: 16px; width: 22px; text-align: center; }

    /* Child toggle button - NÚT MỞ MENU CON CẤP 2 */
    .nav-child-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 48px;
        min-height: 44px;
        background: linear-gradient(135deg, #e8f5e9, #c8e6c9);
        border: none;
        border-left: 2px solid #a5d6a7;
        border-bottom: 1px solid #eee;
        cursor: pointer;
        color: #2e7d32;
        flex-shrink: 0;
        transition: all 0.25s;
    }
    .nav-child-toggle svg {
        width: 16px;
        height: 16px;
    }
    .nav-child-toggle:active {
        background: linear-gradient(135deg, #a5d6a7, #81c784);
        color: #fff;
        transform: scale(0.93);
    }
    .nav-child-toggle svg { transition: transform 0.25s; }
    .nav-child-toggle svg.rotated { transform: rotate(180deg); }

    /* Submenu level 2 (children) */
    .nav-submenu-child {
        list-style: none;
        padding: 0;
        margin: 0;
        background: #fff;
        border-left: 3px solid var(--primary);
    }
    .nav-submenu-child li a {
        display: block;
        padding: 10px 16px 10px 40px;
        font-size: 13px;
        color: #555;
        border-bottom: 1px solid #f5f5f5;
        text-decoration: none;
        transition: all 0.2s;
    }
    .nav-submenu-child li a:active {
        background: #e3f2fd;
        color: var(--primary);
    }

    /* "Xem tất cả" item */
    .nav-submenu-all a {
        font-weight: 600 !important;
        color: var(--primary) !important;
        font-size: 13px !important;
    }

    /* Hotline at bottom */
    .nav-hotline {
        padding: 16px 18px;
        border-top: 2px solid #f0f0f0;
        margin-top: 8px;
    }

    /* Grid layouts for mobile */
    .product-grid, .product-grid-5 { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .news-grid { grid-template-columns: repeat(2, 1fr); }
    .service-grid { grid-template-columns: repeat(2, 1fr); }
    .project-grid { grid-template-columns: repeat(2, 1fr); }
    .category-grid { grid-template-columns: repeat(3, 1fr); }
    .section { padding: 3px 0; }
    .section-title { font-size: 1.25rem; }
    .hero img { border-radius: var(--radius) !important; }
    .footer-grid { grid-template-columns: 1fr; }
    .cart-table { font-size: 13px; }
    .newsletter-form { flex-direction: column; }
}

@media (max-width: 480px) {
    .product-grid, .product-grid-5 { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .category-grid { grid-template-columns: repeat(2, 1fr); }
    .product-card-body { padding: 8px; }
    .product-card-name { font-size: 13px; min-height: 36px; }
    .price-current { font-size: 14px; }
    .container { padding: 0 12px; }
    .hero { padding: 24px 0; }
    .floating-buttons { bottom: 16px; right: 16px; }
    .float-btn { width: 42px; height: 42px; }
}

/* ========== Print ========== */
@media print {
    .header, .footer, .floating-buttons, .breadcrumb { display: none; }
    body { font-size: 12pt; color: #000; }
    .container { max-width: 100%; }
    a { color: #000; }
    .product-card { break-inside: avoid; }
}


/* ===== Mobile Header: 3-Row Layout ===== */
@media (max-width: 768px) {
  .header-phone-cta { display: none !important; }

  .header-main-inner {
    display: flex !important;
    flex-wrap: wrap !important;
    justify-content: center !important;
    align-items: center !important;
    position: relative !important;
    padding: 10px 40px !important;
    gap: 0 !important;
  }

  /* Logo centered as main flex item */
  .logo {
    order: 1 !important;
    flex: 0 0 auto !important;
    max-width: none !important;
  }
  .logo img, .logo svg {
    max-height: 60px !important;
    width: auto !important;
  }

  /* Actions wrapper: static so children position relative to .header-main-inner */
  .header-actions {
    position: static !important;
    order: 2 !important;
    flex: 0 0 0px !important;
    overflow: visible !important;
    min-width: 0 !important;
    padding: 0 !important;
    margin: 0 !important;
  }

  /* Hamburger: absolute LEFT */
  .mobile-menu-toggle {
    display: flex !important;
    position: absolute !important;
    left: 0 !important;
    top: 50% !important;
    transform: translateY(-50%) !important;
    background: none !important;
    border: none !important;
    padding: 6px !important;
    cursor: pointer;
    z-index: 5;
    margin-top: -14px !important;
  }

  /* Cart: absolute RIGHT */
  .header-cart {
    position: absolute !important;
    right: 0 !important;
    top: 50% !important;
    transform: translateY(-50%) !important;
    z-index: 5;
    margin-top: -14px !important;
  }

  /* Search bar: full width on row 3 */
  .header-search {
    order: 3 !important;
    flex: 0 0 100% !important;
    max-width: none !important;
    width: 100% !important;
    min-width: 0 !important;
    margin-top: 8px !important;
  }
  .search-wrapper { width: 100% !important; }
  .search-wrapper input {
    width: 100% !important;
    padding: 10px 44px 10px 14px !important;
    font-size: 14px !important;
    border-radius: 8px !important;
  }
}

@media (max-width: 480px) {
  .header-main-inner { padding: 8px 36px !important; }
  .logo img, .logo svg { max-height: 52px !important; }
  .search-wrapper input {
    padding: 9px 40px 9px 12px !important;
    font-size: 13px !important;
  }
}

/* ============================================
   CART PAGE - Mobile Responsive
   ============================================ */
@media (max-width: 768px) {
  /* Stack grid: cart items on top, summary below */
  
  .cart-grid {
    display: block !important;
    grid-template-columns: 1fr !important;
  }

  /* Cart table: hide thead, make each row a card */
  .cart-table thead { display: none; }
  .cart-table,
  .cart-table tbody,
  .cart-table tr,
  .cart-table td {
    display: block;
    width: 100%;
  }
  .cart-table tr {
    padding: 16px 0;
    border-bottom: 1px solid var(--border-light);
    position: relative;
  }
  .cart-table td {
    border: none;
    padding: 4px 0;
    text-align: left;
  }
  /* Product cell: full width */
  .cart-table td:first-child {
    padding-bottom: 8px;
  }
  .cart-product {
    flex-direction: row;
    align-items: center;
    gap: 12px;
  }
  .cart-product-img {
    width: 70px;
    height: 70px;
    flex-shrink: 0;
  }
  .cart-product-name {
    font-size: 14px;
    line-height: 1.4;
  }

  /* Price, qty, total: inline row below product */
  .cart-table td:nth-child(2),
  .cart-table td:nth-child(3),
  .cart-table td:nth-child(4) {
    display: inline-block;
    width: auto;
    padding: 4px 8px 4px 0;
    font-size: 14px;
  }
  .cart-table td:nth-child(2)::before { content: "Giá: "; color: var(--text-light); font-size: 12px; }
  .cart-table td:nth-child(4)::before { content: "= "; color: var(--text-light); font-size: 12px; }

  /* Qty control */
  .qty-control {
    display: inline-flex;
    align-items: center;
  }
  .qty-control button {
    width: 30px;
    height: 30px;
  }
  .qty-control input {
    width: 40px;
    height: 30px;
    text-align: center;
  }

  /* Delete button: top right */
  .cart-table td:last-child {
    position: absolute;
    top: 16px;
    right: 0;
    width: auto;
    padding: 0;
  }

  /* Summary section */
  .cart-summary {
    margin-top: 24px;
    position: static;
  }
}

@media (max-width: 480px) {
  .cart-product-img {
    width: 56px;
    height: 56px;
  }
  .cart-product-name {
    font-size: 13px;
  }
  .cart-summary {
    padding: 16px;
  }
}

/* ============================================
   CHECKOUT PAGE - Desktop + Mobile Responsive
   ============================================ */
.checkout-grid { display: grid; grid-template-columns: 1fr 400px; gap: 32px; }
.checkout-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

@media (max-width: 768px) {
  .checkout-grid {
    display: block;
  }
  .checkout-form-row {
    display: block;
  }
  .checkout-form-row > .form-group {
    margin-bottom: 12px;
  }
  /* Order summary on checkout */
  .checkout-grid > div:last-child {
    margin-top: 24px;
  }
  .checkout-grid .cart-summary {
    position: static !important;
  }
}

/* ============================================
   TOP BAR - Mobile: phone left, email right
   ============================================ */
@media (max-width: 768px) {
  .header-top {
    padding: 5px 0;
    font-size: 12px;
  }
  .header-top-inner {
    padding: 0 12px;
  }
  .header-top .header-social {
    display: none;
  }
  .header-top-inner > div:first-child {
    display: flex;
    justify-content: space-between;
    width: 100%;
    gap: 8px;
  }
  .header-top-inner > div:first-child a {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
  }
  .header-top-inner > div:first-child a svg {
    width: 13px;
    height: 13px;
  }
}