/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --primary: #2d6a4f;
    --primary-dark: #1b4332;
    --primary-light: #d8f3dc;
    --header-bg: #ffffff;
    --header-text: #222222;
    --bg: #f8f8f8;
    --white: #ffffff;
    --gray-100: #f5f5f5;
    --gray-200: #eeeeee;
    --gray-400: #aaaaaa;
    --gray-600: #666666;
    --gray-800: #333333;
    --danger: #dc3545;
    --success: #28a745;
    --shadow: 0 2px 12px rgba(0,0,0,.07);
    --shadow-lg: 0 8px 32px rgba(0,0,0,.12);
    --radius: 10px;
    --radius-sm: 6px;
    --transition: .2s ease;
}

body {
    font-family: 'Inter', sans-serif;
    font-size: 15px;
    line-height: 1.6;
    color: var(--gray-800);
    background: var(--bg);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

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

/* ===== HEADER ===== */
.site-header {
    background: var(--header-bg);
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 8px rgba(0,0,0,.06);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
    gap: 24px;
}

.logo-link { display: flex; align-items: center; }
.logo-img { height: 42px; width: auto; }
.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -.5px;
}

.main-nav ul {
    display: flex;
    gap: 4px;
    align-items: center;
}

.main-nav a {
    color: var(--header-text);
    font-size: .9rem;
    font-weight: 500;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    transition: background var(--transition), color var(--transition);
}

.main-nav a:hover {
    background: var(--primary-light);
    color: var(--primary);
}

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

.cart-btn {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--gray-100);
    color: var(--gray-800);
    font-size: 1.1rem;
    transition: background var(--transition), color var(--transition);
}

.cart-btn:hover { background: var(--primary); color: #fff; }

.cart-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    background: var(--danger);
    color: #fff;
    font-size: .65rem;
    font-weight: 700;
    min-width: 18px;
    height: 18px;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
}

.mobile-menu-btn {
    display: none;
    width: 42px;
    height: 42px;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: var(--gray-100);
    font-size: 1.1rem;
    color: var(--gray-800);
}

.mobile-nav {
    display: none;
    border-top: 1px solid var(--gray-200);
    background: var(--header-bg);
    padding: 12px 0;
}

.mobile-nav ul { padding: 0 16px; }
.mobile-nav a {
    display: block;
    padding: 12px 16px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    color: var(--header-text);
    transition: background var(--transition);
}
.mobile-nav a:hover { background: var(--primary-light); color: var(--primary); }
.mobile-nav.open { display: block; }

/* ===== HERO BANNER ===== */
.hero-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #fff;
    padding: 56px 0 44px;
    text-align: center;
}

.hero-section h1 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.hero-section p {
    font-size: 1.05rem;
    opacity: .85;
    max-width: 500px;
    margin: 0 auto;
}

/* ===== CATEGORY FILTER ===== */
.filter-bar {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: 14px 0;
}

.filter-inner {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 7px 18px;
    border-radius: 20px;
    background: var(--gray-100);
    color: var(--gray-600);
    font-size: .85rem;
    font-weight: 500;
    transition: all var(--transition);
    border: 2px solid transparent;
}

.filter-btn:hover, .filter-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* ===== PRODUCTS GRID ===== */
.products-section { padding: 40px 0 60px; }

.products-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}

.products-count { color: var(--gray-600); font-size: .9rem; }

.sort-select {
    padding: 8px 14px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    background: var(--white);
    font-size: .85rem;
    color: var(--gray-800);
    cursor: pointer;
    outline: none;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 22px;
}

/* ===== PRODUCT CARD ===== */
.product-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.product-img-wrap {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
    background: var(--gray-100);
}

.product-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .3s ease;
}

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

.no-image {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
    font-size: 2.5rem;
}

.badge-featured {
    position: absolute;
    top: 10px;
    left: 10px;
    background: var(--primary);
    color: #fff;
    font-size: .7rem;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: .5px;
}

.badge-out {
    position: absolute;
    top: 10px;
    right: 10px;
    background: var(--danger);
    color: #fff;
    font-size: .7rem;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 20px;
}

.product-info {
    padding: 16px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.product-category {
    font-size: .75rem;
    color: var(--primary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .5px;
    margin-bottom: 6px;
}

.product-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 6px;
    line-height: 1.4;
}

.product-desc {
    font-size: .83rem;
    color: var(--gray-600);
    margin-bottom: 14px;
    flex: 1;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.product-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-top: auto;
}

.product-price {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary);
}

.product-price .unit {
    font-size: .75rem;
    font-weight: 400;
    color: var(--gray-400);
}

.btn-add-cart {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--primary);
    color: #fff;
    border-radius: var(--radius-sm);
    font-size: .85rem;
    font-weight: 600;
    transition: background var(--transition);
}

.btn-add-cart:hover { background: var(--primary-dark); }
.btn-add-cart:disabled { background: var(--gray-400); cursor: not-allowed; }

/* ===== PRODUCT DETAIL ===== */
.product-detail-section { padding: 40px 0 60px; }

.detail-breadcrumb {
    font-size: .85rem;
    color: var(--gray-600);
    margin-bottom: 24px;
}
.detail-breadcrumb a { color: var(--primary); }
.detail-breadcrumb a:hover { text-decoration: underline; }

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

.detail-images .main-img {
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--gray-100);
    aspect-ratio: 4/3;
}

.detail-images .main-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.thumb-strip {
    display: flex;
    gap: 8px;
    margin-top: 10px;
    flex-wrap: wrap;
}

.thumb-strip img {
    width: 72px;
    height: 72px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: 2px solid transparent;
    transition: border-color var(--transition);
}

.thumb-strip img:hover, .thumb-strip img.active { border-color: var(--primary); }

.detail-info .product-category { margin-bottom: 8px; }

.detail-info h1 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 14px;
    line-height: 1.3;
}

.detail-price {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
}

.detail-desc {
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 24px;
}

.stock-info {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: .85rem;
    padding: 6px 14px;
    border-radius: 20px;
    margin-bottom: 24px;
}

.in-stock { background: #d4edda; color: #155724; }
.out-stock { background: #f8d7da; color: #721c24; }

.qty-add-row {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
}

.qty-control {
    display: flex;
    align-items: center;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.qty-control button {
    width: 36px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
    font-size: 1rem;
    transition: background var(--transition);
}

.qty-control button:hover { background: var(--gray-200); }

.qty-control input {
    width: 52px;
    height: 40px;
    text-align: center;
    border: none;
    font-size: .95rem;
    font-weight: 600;
    outline: none;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    background: var(--primary);
    color: #fff;
    border-radius: var(--radius-sm);
    font-size: .95rem;
    font-weight: 600;
    transition: background var(--transition);
}

.btn-primary:hover { background: var(--primary-dark); }

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 11px 24px;
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
    border-radius: var(--radius-sm);
    font-size: .9rem;
    font-weight: 600;
    transition: all var(--transition);
}

.btn-outline:hover { background: var(--primary); color: #fff; }

.btn-danger {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 18px;
    background: var(--danger);
    color: #fff;
    border-radius: var(--radius-sm);
    font-size: .85rem;
    font-weight: 600;
    transition: background var(--transition);
}

.btn-danger:hover { background: #c82333; }

/* ===== CART ===== */
.cart-section { padding: 40px 0 60px; }

.cart-grid {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 32px;
    align-items: start;
}

.cart-table {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.cart-table table {
    width: 100%;
    border-collapse: collapse;
}

.cart-table th {
    background: var(--gray-100);
    padding: 14px 18px;
    text-align: left;
    font-size: .8rem;
    font-weight: 700;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: .5px;
}

.cart-table td {
    padding: 16px 18px;
    border-top: 1px solid var(--gray-100);
    vertical-align: middle;
}

.cart-product {
    display: flex;
    align-items: center;
    gap: 14px;
}

.cart-product img {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    background: var(--gray-100);
}

.cart-product-name { font-weight: 600; font-size: .9rem; }

.cart-summary {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
    position: sticky;
    top: 90px;
}

.cart-summary h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 20px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--gray-200);
}

.summary-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    font-size: .9rem;
}

.summary-row.total {
    font-size: 1.05rem;
    font-weight: 700;
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--gray-200);
    color: var(--primary);
}

.summary-row.free-shipping { color: var(--success); font-size: .85rem; }

.checkout-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px;
    background: var(--primary);
    color: #fff;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 700;
    margin-top: 20px;
    transition: background var(--transition);
}

.checkout-btn:hover { background: var(--primary-dark); }

/* ===== CHECKOUT ===== */
.checkout-section { padding: 40px 0 60px; }

.checkout-grid {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 32px;
    align-items: start;
}

.checkout-form-box {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 32px;
}

.checkout-form-box h2 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 24px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--gray-200);
}

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-row.single { grid-template-columns: 1fr; }

.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: .85rem; font-weight: 600; margin-bottom: 7px; color: var(--gray-800); }

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    font-size: .9rem;
    font-family: inherit;
    outline: none;
    transition: border-color var(--transition);
    background: var(--white);
    color: var(--gray-800);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--primary); }

.form-group textarea { resize: vertical; min-height: 90px; }

/* ===== ORDER SUMMARY ASIDE ===== */
.order-aside {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
    position: sticky;
    top: 90px;
}

.order-aside h3 { font-size: 1rem; font-weight: 700; margin-bottom: 18px; }

.order-items { margin-bottom: 16px; }

.order-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid var(--gray-100);
}

.order-item img {
    width: 48px;
    height: 48px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    background: var(--gray-100);
}

.order-item-name { font-size: .85rem; font-weight: 600; flex: 1; }
.order-item-price { font-size: .85rem; font-weight: 700; color: var(--primary); }

/* ===== ALERTS ===== */
.alert {
    padding: 12px 18px;
    border-radius: var(--radius-sm);
    margin-bottom: 18px;
    font-size: .9rem;
    font-weight: 500;
}

.alert-success { background: #d4edda; color: #155724; border-left: 4px solid var(--success); }
.alert-error { background: #f8d7da; color: #721c24; border-left: 4px solid var(--danger); }
.alert-info { background: #d1ecf1; color: #0c5460; border-left: 4px solid #17a2b8; }

/* ===== EMPTY STATE ===== */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: var(--gray-400);
}

.empty-state i { font-size: 3.5rem; margin-bottom: 16px; display: block; }
.empty-state h3 { font-size: 1.2rem; color: var(--gray-600); margin-bottom: 8px; }
.empty-state p { margin-bottom: 20px; }

/* ===== FOOTER ===== */
.site-footer {
    background: var(--gray-800);
    color: #ccc;
    padding: 48px 0 24px;
    margin-top: auto;
}

.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 36px;
}

.footer-brand .logo-text { color: #fff; font-size: 1.2rem; font-weight: 700; }
.footer-shipping { font-size: .83rem; margin-top: 12px; color: #aaa; }

.footer-contact { display: flex; flex-direction: column; gap: 10px; }
.footer-contact a { font-size: .85rem; color: #ccc; display: flex; align-items: center; gap: 8px; transition: color var(--transition); }
.footer-contact a:hover { color: #fff; }

.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-links a { font-size: .85rem; color: #ccc; transition: color var(--transition); }
.footer-links a:hover { color: #fff; }

.footer-bottom {
    border-top: 1px solid #444;
    padding-top: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-bottom p { font-size: .82rem; color: #888; }

/* ===== PAGE TITLE ===== */
.page-title-bar {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: 20px 0;
}

.page-title-bar h1 { font-size: 1.5rem; font-weight: 700; }
.page-title-bar p { color: var(--gray-600); font-size: .9rem; margin-top: 4px; }

/* ===== SECTION TITLE ===== */
.section-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--gray-800);
}

/* ===== NOTIFICATION TOAST ===== */
#toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--gray-800);
    color: #fff;
    padding: 14px 22px;
    border-radius: var(--radius);
    font-size: .9rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 9999;
    display: none;
    animation: slideIn .3s ease;
}

#toast.show { display: block; }
#toast.success { background: var(--success); }
#toast.error { background: var(--danger); }

@keyframes slideIn {
    from { transform: translateX(100px); opacity: 0; }
    to   { transform: translateX(0); opacity: 1; }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
    .main-nav { display: none; }
    .mobile-menu-btn { display: flex; }
    .detail-grid { grid-template-columns: 1fr; gap: 28px; }
    .cart-grid { grid-template-columns: 1fr; }
    .checkout-grid { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
    .hero-section h1 { font-size: 1.6rem; }
    .products-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 14px; }
    .product-info { padding: 12px; }
    .footer-inner { grid-template-columns: 1fr; gap: 24px; }
    .form-row { grid-template-columns: 1fr; }
    .cart-table th:nth-child(3),
    .cart-table td:nth-child(3) { display: none; }
}