/* ================================
   SoftStore - Main Stylesheet
   Dark Theme with Purple-Blue Accent
   ================================ */

/* CSS Variables */
:root {
    --bg-primary: #0a0a1a;
    --bg-secondary: #111128;
    --bg-card: #16163a;
    --bg-card-hover: #1c1c4a;
    --bg-glass: rgba(22, 22, 58, 0.7);
    --bg-input: #1a1a3e;
    --text-primary: #e8e8f0;
    --text-secondary: #9595b5;
    --text-muted: #6a6a8a;
    --accent-1: #7c3aed;
    --accent-2: #3b82f6;
    --accent-gradient: linear-gradient(135deg, #7c3aed 0%, #3b82f6 100%);
    --accent-gradient-hover: linear-gradient(135deg, #6d28d9 0%, #2563eb 100%);
    --accent-glow: 0 0 30px rgba(124, 58, 237, 0.3);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --border-color: rgba(124, 58, 237, 0.15);
    --border-glow: rgba(124, 58, 237, 0.4);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Be Vietnam Pro', sans-serif;
}

/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ====================== HEADER ====================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 26, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    transition: var(--transition);
}

.logo-icon {
    font-size: 1.6rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo:hover { transform: scale(1.02); }

.main-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(124, 58, 237, 0.1);
}

.nav-link.active {
    color: #fff;
    background: var(--accent-gradient);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
    border-radius: 2px;
}

/* ====================== HERO SECTION ====================== */
.hero {
    padding: 140px 0 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(124, 58, 237, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 70% 50%, rgba(59, 130, 246, 0.08) 0%, transparent 50%);
    animation: heroFloat 15s ease-in-out infinite;
}

@keyframes heroFloat {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(30px, -30px) rotate(1deg); }
    66% { transform: translate(-20px, 20px) rotate(-1deg); }
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}

.hero-badge i { color: var(--accent-1); }

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero h1 .gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ====================== BUTTONS ====================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: #fff;
    box-shadow: var(--accent-glow);
}

.btn-primary:hover {
    background: var(--accent-gradient-hover);
    transform: translateY(-2px);
    box-shadow: 0 0 40px rgba(124, 58, 237, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--accent-1);
    background: rgba(124, 58, 237, 0.1);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 8px 18px;
    font-size: 0.85rem;
}

.btn-lg {
    padding: 14px 36px;
    font-size: 1.05rem;
}

.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-warning { background: var(--warning); color: #000; }

/* ====================== STATS ====================== */
.stats-section {
    padding: 40px 0 80px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
}

.stat-card {
    text-align: center;
    padding: 32px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.stat-card:hover {
    border-color: var(--border-glow);
    transform: translateY(-4px);
    box-shadow: var(--accent-glow);
}

.stat-card .stat-icon {
    font-size: 2rem;
    margin-bottom: 12px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-card .stat-number {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 4px;
}

.stat-card .stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ====================== SECTION ====================== */
.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

/* ====================== PRODUCT CARDS ====================== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.product-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    border-color: var(--border-glow);
    transform: translateY(-6px);
    box-shadow: var(--accent-glow);
}

.product-card .card-thumb {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
    background: var(--bg-secondary);
}

.product-card .card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.product-card:hover .card-thumb img {
    transform: scale(1.05);
}

.product-card .card-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 4px 12px;
    background: var(--accent-gradient);
    color: #fff;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
}

.product-card .card-body {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-card .card-category {
    font-size: 0.8rem;
    color: var(--accent-1);
    font-weight: 500;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.product-card .card-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 8px;
    line-height: 1.3;
}

.product-card .card-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 16px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-card .card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.product-card .card-price {
    font-size: 1.2rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.product-card .card-price .old-price {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-decoration: line-through;
    -webkit-text-fill-color: var(--text-muted);
    font-weight: 400;
    margin-left: 6px;
}

.card-no-thumb {
    aspect-ratio: 16/10;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--text-muted);
}

/* ====================== PRODUCT DETAIL ====================== */
.product-detail {
    padding: 100px 0 60px;
}

.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.product-gallery {
    position: sticky;
    top: 90px;
}

.product-gallery .main-image {
    width: 100%;
    aspect-ratio: 16/10;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    margin-bottom: 12px;
}

.product-gallery .main-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-gallery .thumbs {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.product-gallery .thumbs img {
    width: 80px;
    height: 50px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    opacity: 0.6;
}

.product-gallery .thumbs img:hover,
.product-gallery .thumbs img.active {
    border-color: var(--accent-1);
    opacity: 1;
}

.product-info h1 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.product-info .product-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.product-info .product-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.product-info .product-price-big {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 24px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.product-info .product-price-big .old-price-big {
    font-size: 1.2rem;
    text-decoration: line-through;
    color: var(--text-muted);
    -webkit-text-fill-color: var(--text-muted);
    font-weight: 400;
    margin-left: 10px;
}

.product-info .product-desc {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.8;
}

.product-info .product-desc img {
    border-radius: var(--radius-md);
    margin: 12px 0;
}

.features-list {
    list-style: none;
    margin-bottom: 32px;
}

.features-list li {
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
}

.features-list li i {
    color: var(--success);
    font-size: 0.85rem;
}

.buy-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* ====================== PRODUCTS PAGE ====================== */
.products-page {
    padding: 100px 0 60px;
}

.products-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 32px;
    flex-wrap: wrap;
    gap: 16px;
}

.products-toolbar h1 {
    font-size: 1.6rem;
    font-weight: 700;
}

.toolbar-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.search-box {
    position: relative;
}

.search-box input {
    padding: 10px 16px 10px 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.9rem;
    width: 250px;
    transition: var(--transition);
}

.search-box input:focus {
    outline: none;
    border-color: var(--accent-1);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
}

.search-box i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.filter-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 8px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.filter-tab:hover {
    border-color: var(--accent-1);
    color: var(--text-primary);
}

.filter-tab.active {
    background: var(--accent-gradient);
    border-color: transparent;
    color: #fff;
}

/* ====================== CHECKOUT ====================== */
.checkout-page {
    padding: 100px 0 60px;
}

.checkout-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 40px;
    align-items: start;
}

.checkout-form-card, .checkout-summary {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.checkout-form-card h2, .checkout-summary h2 {
    font-size: 1.3rem;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--text-secondary);
}

.form-group label .required {
    color: var(--danger);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.95rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-1);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
}

textarea.form-control { resize: vertical; min-height: 100px; }

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='%239595b5' viewBox='0 0 24 24'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 20px;
    padding-right: 40px;
}

.summary-product {
    display: flex;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid var(--border-color);
}

.summary-product img {
    width: 80px;
    height: 50px;
    border-radius: var(--radius-sm);
    object-fit: cover;
}

.summary-product .sp-info h4 {
    font-size: 1rem;
    margin-bottom: 4px;
}

.summary-product .sp-info p {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.summary-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    font-size: 1.2rem;
    font-weight: 700;
}

.summary-total .total-price {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 1.5rem;
}

.momo-qr-section {
    text-align: center;
    margin-top: 20px;
    padding: 24px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.momo-qr-section img {
    max-width: 250px;
    border-radius: var(--radius-md);
    margin: 12px 0;
}

.momo-qr-section p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ====================== CONTACT ====================== */
.contact-page {
    padding: 100px 0 60px;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact-info-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.contact-info-card h2 {
    font-size: 1.4rem;
    margin-bottom: 24px;
}

.contact-info-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid var(--border-color);
}

.contact-info-item:last-child { border-bottom: none; }

.contact-info-item .cii-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1rem;
    flex-shrink: 0;
}

.contact-info-item .cii-text h4 {
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.contact-info-item .cii-text p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.contact-form-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.contact-form-card h2 {
    font-size: 1.4rem;
    margin-bottom: 24px;
}

/* ====================== PAGINATION ====================== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
}

.page-link {
    padding: 8px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: var(--transition);
    text-decoration: none;
}

.page-link:hover, .page-link.active {
    background: var(--accent-gradient);
    border-color: transparent;
    color: #fff;
}

/* ====================== ALERTS ====================== */
.alert {
    padding: 14px 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--success);
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--danger);
}

.alert-info {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: var(--accent-2);
}

/* ====================== FOOTER ====================== */
.site-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 0;
    margin-top: 80px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-logo i {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 1.5rem;
}

.footer-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 10px;
}

.footer-social a {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--accent-gradient);
    border-color: transparent;
    color: #fff;
    transform: translateY(-2px);
}

.footer-col h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.footer-col ul { list-style: none; }

.footer-col ul li { margin-bottom: 10px; }

.footer-col ul li a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--accent-1);
    padding-left: 4px;
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-contact li i {
    color: var(--accent-1);
    width: 16px;
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding: 20px 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ====================== PAYMENT RESULT ====================== */
.result-page {
    padding: 120px 0 60px;
    text-align: center;
}

.result-card {
    max-width: 500px;
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 48px 32px;
}

.result-icon {
    font-size: 4rem;
    margin-bottom: 20px;
}

.result-icon.success { color: var(--success); }
.result-icon.pending { color: var(--warning); }
.result-icon.error { color: var(--danger); }

.result-card h1 {
    font-size: 1.6rem;
    margin-bottom: 12px;
}

.result-card p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

/* ====================== EMPTY STATE ====================== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 16px;
    opacity: 0.3;
}

.empty-state h3 { margin-bottom: 8px; color: var(--text-secondary); }
.empty-state p { font-size: 0.9rem; }

/* ====================== RESPONSIVE ====================== */
@media (max-width: 768px) {
    .mobile-menu-btn { display: flex; }

    .main-nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        border-bottom: 1px solid var(--border-color);
        flex-direction: column;
        padding: 16px;
        gap: 4px;
        transform: translateY(-120%);
        transition: var(--transition);
        z-index: 999;
    }

    .main-nav.open { transform: translateY(0); }

    .nav-link {
        width: 100%;
        padding: 12px 16px;
    }

    .hero h1 { font-size: 1.8rem; }

    .product-detail-grid { grid-template-columns: 1fr; }
    .product-gallery { position: static; }

    .checkout-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }

    .products-toolbar { flex-direction: column; align-items: flex-start; }
    .search-box input { width: 100%; }

    .hero-buttons { flex-direction: column; align-items: center; }
}

@media (max-width: 480px) {
    .products-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
}