/* =========================================
 * 0. RESET & BIẾN TOÀN CỤC
 * =======================================*/

:root {
    --color-bg: #f5f5f7;
    --color-text: #111827;
    --color-text-muted: #6b7280;
    --color-border: #e5e7eb;
    --color-border-soft: #d1d5db;
    --color-primary: #e11b22;
    --color-primary-dark: #b91c1c;
    --color-primary-deep: #7f1d1d;
    --color-primary-soft: #fee2e2;
    --color-primary-shadow: rgba(248,113,113,0.45);
    --color-card: #ffffff;
    --radius-pill: 999px;
    --radius-lg: 18px;
    --shadow-soft: 0 10px 26px rgba(15,23,42,0.08);
    --shadow-card: 0 12px 30px rgba(15,23,42,0.08);
    --shadow-strong: 0 16px 40px rgba(15,23,42,0.12);
    --transition-fast: 0.15s ease;
    --transition-normal: 0.2s ease;
    --header-height: auto;
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

button {
    font-family: inherit;
}

/* Focus cho accessibility */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* =========================================
 * 1. LAYOUT CHUNG & UTILITIES
 * =======================================*/

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 12px;
}

.site-main {
    padding: 16px 0 40px;
}

.section {
    margin-top: 20px;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

.section-header h2 {
    font-size: 1.1rem;
}

.section-header a {
    font-size: 0.85rem;
    color: var(--color-primary);
}

/* Store locator */
.store-filter {
    margin-bottom: 12px;
}

.store-filter__note {
    font-size: 0.85rem;
    color: #6b7280;
    margin-bottom: 6px;
}

.store-filter__controls {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.store-filter__select {
    border-radius: var(--radius-pill);
    border: 1px solid var(--color-border);
    padding: 6px 10px;
    font-size: 0.9rem;
    background: #fff;
    min-width: 200px;
}

.store-empty {
    margin-top: 10px;
    padding: 12px;
    border-radius: 12px;
    background: #fff;
    border: 1px solid var(--color-border);
    color: #6b7280;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.store-empty[hidden] {
    display: none !important;
}

/* Lab listing */
.lab-group {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 12px 14px;
    margin-bottom: 12px;
    box-shadow: var(--shadow-soft);
}

.lab-group__title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1rem;
    margin: 0 0 8px;
}

.lab-count {
    font-size: 0.85rem;
    color: #6b7280;
}

.lab-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 6px 12px;
}

.lab-list a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    border-radius: 10px;
    border: 1px solid var(--color-border);
    background: #f9fafb;
    transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.lab-list a:hover {
    background: #fff;
    border-color: var(--color-primary);
    transform: translateY(-1px);
    color: var(--color-primary-dark);
}

.lab-empty {
    padding: 10px 12px;
    border-radius: 10px;
    background: #f9fafb;
    border: 1px dashed var(--color-border);
    color: #6b7280;
}

/* Screen reader only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* =========================================
 * 2. BUTTONS, BADGES & LINK INLINE
 * =======================================*/

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-pill);
    padding: 7px 16px;
    font-size: 0.85rem;
    font-weight: 600;
    border-width: 1px;
    border-style: solid;
    border-color: transparent;
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: all var(--transition-normal);
    white-space: nowrap;
}

/* Nút chính: đỏ gradient */
.btn--primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    border-color: #f97373;
    color: #fff;
    box-shadow: 0 8px 18px var(--color-primary-shadow);
}

.btn--primary:hover {
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary-deep));
    transform: translateY(-1px);
    box-shadow: 0 12px 26px rgba(248,113,113,0.65);
}

.btn--primary:active {
    transform: translateY(0);
    box-shadow: 0 6px 14px rgba(185,28,28,0.7);
}

/* Nút viền (ghost) */
.btn--ghost {
    background: #ffffff;
    border-color: var(--color-border-soft);
    color: var(--color-text);
    box-shadow: 0 2px 6px rgba(15,23,42,0.05);
}

.btn--ghost:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: #fef2f2;
    box-shadow: 0 6px 14px rgba(15,23,42,0.12);
}

.btn--full {
    width: 100%;
}

/* Icon button: giỏ / menu / đóng... */
.icon-btn {
    border-radius: var(--radius-pill);
    width: 34px;
    height: 34px;
    border: 1px solid transparent;
    background: transparent;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--color-text);
    transition: background var(--transition-normal), border-color var(--transition-normal), transform var(--transition-fast);
}

.icon-btn:hover {
    background: #f3f4f6;
    border-color: var(--color-border);
}

/* Hiện ở mobile mặc định, ẩn ở desktop (override trong media) */
.icon-btn--menu {
    display: none;
    font-size: 1.2rem;
    transition: transform var(--transition-normal), color var(--transition-normal);
}

.icon-btn--menu:hover {
    transform: scale(1.1);
    color: var(--color-primary);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 3px 8px;
    border-radius: var(--radius-pill);
    font-size: 0.7rem;
    background: #e5e7eb;
    color: var(--color-text);
}

.badge--cart {
    position: absolute;
    top: -4px;
    right: -4px;
    background: var(--color-primary);
    color: #fff;
}

.badge--role {
    background: var(--color-primary);
    color: #fff;
}

/* Link inline */
.link-inline {
    font-size: 0.8rem;
    color: var(--color-text);
}

.link-inline:hover {
    color: var(--color-primary);
}

.link-inline--danger {
    color: #dc2626;
}

/* =========================================
 * 3. HEADER & TOP BAR
 * =======================================*/

.site-header {
    background: #ffffff;
    box-shadow: 0 1px 0 rgba(15, 23, 42, 0.06);
    position: sticky;
    top: 0;
    z-index: 40;
}

.top-bar {
    border-bottom: 1px solid var(--color-border);
}

.top-bar__inner {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
}

/* Logo */
.logo {
    display: inline-flex;
    align-items: center;
}

.logo__text {
    font-weight: 800;
    font-size: 1.3rem;
    letter-spacing: 0.02em;
}

.logo__text span {
    color: var(--color-primary);
}

/* Search bar */
.search-bar {
    display: flex;
    align-items: stretch;
    border-radius: var(--radius-pill);
    background: #f3f4f6;
    padding: 2px;
    box-shadow: inset 0 0 0 1px var(--color-border);
}

.search-bar__input {
    flex: 1;
    border: none;
    padding: 8px 12px;
    font-size: 0.9rem;
    background: transparent;
    outline: none;
}

.search-bar__input::placeholder {
    color: #9ca3af;
}

.search-bar__btn {
    border: none;
    border-radius: var(--radius-pill);
    background: var(--color-primary);
    color: #fff;
    width: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background var(--transition-normal), transform var(--transition-fast);
}

.search-bar__btn:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
}

/* Top actions */
.top-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
}

.top-actions__item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    padding: 6px 8px;
    border-radius: var(--radius-pill);
    transition: background var(--transition-normal), color var(--transition-normal), transform var(--transition-fast);
    color: #4b5563;
    white-space: nowrap;
}

.top-actions__item i {
    font-size: 0.95rem;
}

.top-actions__item:hover {
    background: #f3f4f6;
    color: var(--color-text);
    transform: translateY(-1px);
}

.top-actions__item--hotline {
    background: var(--color-text);
    color: #f9fafb;
    padding: 6px 10px;
}

.top-actions__item--hotline:hover {
    background: #020617;
}

.top-actions__label {
    font-size: 0.65rem;
    opacity: 0.8;
}

.top-actions__hotline {
    font-weight: 600;
    font-size: 0.8rem;
}

/* User area */
.user-area {
    display: flex;
    align-items: center;
    gap: 8px;
}

.user-area__info {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    background: #f3f4f6;
    padding: 6px 10px;
    border-radius: var(--radius-pill);
}

.user-area__info i {
    color: var(--color-primary);
    font-size: 1rem;
}

.user-area__info span {
    white-space: nowrap;
}

.user-area__links {
    display: flex;
    flex-direction: column;
    gap: 4px;
    align-items: flex-start;
}

/* =========================================
 * 4. MAIN NAV
 * =======================================*/

.main-nav {
    background: #111827;
}

.main-nav__inner {
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

.main-nav__list {
    display: flex;
    align-items: center;
    gap: 18px;
}

.main-nav__list li a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 0;
    font-size: 0.9rem;
    color: #e5e7eb;
    position: relative;
    transition: color var(--transition-normal);
}

.main-nav__list li a::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -4px;
    height: 2px;
    background: var(--color-primary);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform var(--transition-normal);
}

.main-nav__list li a:hover {
    color: #ffffff;
}

.main-nav__list li a:hover::after {
    transform: scaleX(1);
}

/* =========================================
 * 5. MOBILE DRAWER (MENU TRƯỢT TỪ TRÁI)
 * =======================================*/

.mobile-drawer {
    position: fixed;
    inset: 0;
    z-index: 50;
    display: none;
}

.mobile-drawer.is-open {
    display: block;
}

.mobile-drawer.is-open .mobile-drawer__panel {
    transform: translateX(0);
}

.mobile-drawer__overlay {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(2px);
}

.mobile-drawer__panel {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 85%;
    max-width: 340px;
    background: #ffffff;
    box-shadow: 4px 0 20px rgba(15, 23, 42, 0.3);
    transform: translateX(-100%);
    transition: transform 0.25s ease-out;
    display: flex;
    flex-direction: column;
    padding: 0;
    overflow: hidden;
}

@keyframes slideIn {
    to {
        transform: translateX(0);
    }
}

.mobile-drawer__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 14px;
    border-bottom: 1px solid #e5e7eb;
    background: #f9fafb;
    flex-shrink: 0;
}

.mobile-drawer__logo span {
    font-weight: 800;
    font-size: 1.15rem;
    letter-spacing: 0.02em;
}

.mobile-drawer__logo span span {
    color: var(--color-primary);
}

.mobile-drawer__body {
    flex: 1;
    overflow-y: auto;
    padding: 12px 10px;
    -webkit-overflow-scrolling: touch;
}

.mobile-drawer__footer {
    padding: 10px;
    border-top: 1px solid #e5e7eb;
    background: #f9fafb;
    flex-shrink: 0;
}

.mobile-drawer__footer .link-inline {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
}

/* mobile user */
.mobile-user {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    padding: 12px 10px;
    background: linear-gradient(135deg, #f3f4f6 0%, #e5e7eb 100%);
    border-radius: 12px;
    margin-bottom: 12px;
    border: 1px solid #d1d5db;
}

.mobile-user i {
    font-size: 1.6rem;
    color: var(--color-primary);
    flex-shrink: 0;
}

.mobile-user--guest {
    background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
    border: 1px dashed var(--color-primary);
}

.mobile-user--guest i {
    color: #dc2626;
}

.mobile-user__actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 12px;
    width: 100%;
}

.mobile-user__actions .btn {
    width: 100%;
    padding: 12px 10px;
    font-size: 0.95rem;
    font-weight: 600;
}

.mobile-links {
    background: #f9fafb;
    border-radius: 12px;
    padding: 8px 6px;
    margin-bottom: 10px;
}

.mobile-links a,
.mobile-nav a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 10px;
    font-size: 0.95rem;
    color: #374151;
    border-radius: 8px;
    transition: background var(--transition-normal), color var(--transition-normal);
}

.mobile-links a:hover,
.mobile-nav a:hover {
    background: #e5e7eb;
    color: var(--color-primary);
}

.mobile-links a i,
.mobile-nav a i {
    width: 20px;
    text-align: center;
    font-size: 1rem;
}

.mobile-nav h4 {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    margin: 12px 8px 8px;
    color: #9ca3af;
    letter-spacing: 0.05em;
}

.divider {
    border: none;
    border-bottom: 1px solid #e5e7eb;
    margin: 10px 0;
}

.mobile-drawer__body .mobile-user {
    order: -1;
}

.mobile-drawer__body .mobile-links {
    order: 0;
}

.mobile-drawer__body .mobile-nav {
    order: 1;
}

/* =========================================
 * 6. MINI-CART OVERLAY
 * =======================================*/

.mini-cart {
    position: fixed;
    inset: 0;
    z-index: 60;
    display: none;
}

.mini-cart.is-open {
    display: block;
}

.mini-cart__overlay {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(2px);
}

.mini-cart__panel {
    position: absolute;
    top: 0;
    bottom: 0;
    right: 0;
    width: min(380px, 92vw);
    max-width: 100%;
    background: #ffffff;
    box-shadow: -4px 0 20px rgba(15, 23, 42, 0.3);
    display: flex;
    flex-direction: column;
    animation: slideInRight 0.25s forwards ease-out;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
    }
    to {
        transform: translateX(0);
    }
}

.mini-cart__header {
    padding: 12px 14px;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.mini-cart__header h3 {
    font-size: 1rem;
}

.mini-cart__body {
    flex: 1;
    padding: 10px 14px;
    overflow-y: auto;
}

.mini-cart__empty {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.mini-cart__list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mini-cart__item {
    display: grid;
    grid-template-columns: 64px 1fr;
    gap: 8px;
    padding: 8px;
    border-radius: 12px;
    background: #f9fafb;
}

.mini-cart__thumb img {
    border-radius: 8px;
    background: var(--color-border);
}

.mini-cart__name {
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 2px;
}

.mini-cart__name:hover {
    color: var(--color-primary);
}

.mini-cart__meta {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.mini-cart__price {
    font-weight: 600;
    color: var(--color-primary);
}

.mini-cart__line-total {
    font-size: 0.85rem;
    margin-top: 4px;
}

.mini-cart__footer {
    border-top: 1px solid var(--color-border);
    padding: 10px 14px 14px;
}

.mini-cart__summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.mini-cart__summary strong {
    color: var(--color-primary);
}

.mini-cart__actions {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

/* =========================================
 * 7. HERO BANNER & PROMO CARDS
 * =======================================*/

.hero {
    margin-top: 12px;
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
    gap: 12px;
}

/* Slider */
.hero-slider {
    background: linear-gradient(135deg, #020617, #111827);
    border-radius: 20px;
    padding: 18px 16px;
    color: #f9fafb;
    position: relative;
    overflow: hidden;
    box-shadow: 0 16px 40px rgba(15, 23, 42, 0.45);
}

.hero-slide {
    display: none;
}

.hero-slide.is-active {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 10px;
    align-items: center;
}

.hero-slide__headline {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.hero-slide__sub {
    font-size: 0.95rem;
    opacity: 0.9;
    margin-bottom: 12px;
}

.hero-slide__badges {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 12px;
}

.hero-slide__badge {
    background: rgba(15, 23, 42, 0.6);
    border-radius: var(--radius-pill);
    padding: 4px 10px;
    font-size: 0.75rem;
}

.hero-slide__image {
    justify-self: center;
}

.hero-slider__dots {
    position: absolute;
    right: 14px;
    bottom: 12px;
    display: flex;
    gap: 6px;
}

.hero-slider__dot {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-pill);
    background: rgba(148, 163, 184, 0.8);
    cursor: pointer;
    transition: transform var(--transition-fast), background var(--transition-normal);
}

.hero-slider__dot.is-active {
    background: var(--color-primary);
    transform: scale(1.1);
}

/* Promo cards */
.promo-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
}

.promo-card {
    background: var(--color-card);
    border-radius: 18px;
    padding: 10px 12px;
    box-shadow: var(--shadow-card);
    display: flex;
    align-items: flex-start;
    gap: 8px;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.promo-card i {
    font-size: 1.2rem;
    color: var(--color-primary);
    margin-top: 2px;
}

.promo-card__title {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 2px;
}

.promo-card__desc {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.promo-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-strong);
}

/* =========================================
 * 8. DANH MỤC NỔI BẬT
 * =======================================*/

.featured-cats {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.featured-cat {
    background: var(--color-card);
    border-radius: 16px;
    padding: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 8px 20px rgba(15, 23, 42, 0.08);
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.featured-cat__icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: var(--color-primary-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
}

.featured-cat__info h3 {
    font-size: 0.95rem;
    margin-bottom: 2px;
}

.featured-cat__info p {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.featured-cat:hover {
    transform: translateY(-2px) scale(1.01);
    box-shadow: var(--shadow-strong);
}

/* =========================================
 * 9. PRODUCT GRID & CARD
 * =======================================*/

.product-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.product-card {
    background: var(--color-card);
    border-radius: 18px;
    padding: 10px 11px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-border);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    height: 100%;
}

.product-card__thumb {
    border-radius: 14px;
    overflow: hidden;
    background: #f3f4f6;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-card__thumb img {
    transition: transform var(--transition-fast);
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.product-card__name {
    font-size: 0.9rem;
    font-weight: 500;
    min-height: 38px;
    max-height: 38px;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.product-card__prices {
    display: flex;
    align-items: baseline;
    gap: 6px;
    min-height: 24px;
}

.product-card__price {
    font-weight: 700;
    font-size: 1rem;
    color: var(--color-primary);
}

.product-card__old {
    font-size: 0.8rem;
    color: #9ca3af;
    text-decoration: line-through;
}

.product-card__badge-row {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-bottom: 4px;
    min-height: 24px;
}

/* Badges nhỏ */
.badge-sale,
.badge-0p,
.badge-online {
    font-size: 0.7rem;
    padding: 3px 6px;
    border-radius: var(--radius-pill);
}

.badge-sale {
    background: var(--color-primary-soft);
    color: #b91c1c;
}

.badge-0p {
    background: #e0f2fe;
    color: #0369a1;
}

.badge-online {
    background: #dcfce7;
    color: #15803d;
}

.product-card__actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
    margin-top: auto;
}

.product-card__link {
    font-size: 0.8rem;
    color: var(--color-text);
}

.product-card__link:hover {
    color: var(--color-primary);
}

.product-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-strong);
}

.product-card:hover .product-card__thumb img {
    transform: scale(1.03);
}

/* =========================================
 * 10. FOOTER
 * =======================================*/

.site-footer {
    background: #111827;
    color: #e5e7eb;
    padding-top: 20px;
    margin-top: 24px;
}

.site-footer__top {
    display: grid;
    grid-template-columns: repeat(1, minmax(0, 1fr));
    gap: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid #1f2937;
}

.footer-col h4 {
    font-size: 0.95rem;
    margin-bottom: 8px;
}

.footer-col ul li {
    margin-bottom: 4px;
}

.footer-col a {
    font-size: 0.85rem;
    color: #e5e7eb;
    opacity: 0.9;
}

.footer-col a:hover {
    color: #ffffff;
    opacity: 1;
}

.footer-socials {
    display: flex;
    gap: 8px;
    margin-bottom: 8px;
}

.footer-socials a {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-pill);
    border: 1px solid #374151;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-normal), transform var(--transition-fast), border-color var(--transition-normal);
}

.footer-socials a:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.footer-contact p {
    font-size: 0.8rem;
    margin-bottom: 3px;
    color: #9ca3af;
}

.footer-contact a {
    color: #e5e7eb;
}

.site-footer__bottom {
    padding: 10px 0 14px;
    text-align: center;
    font-size: 0.8rem;
    color: #9ca3af;
}

/* =========================================
 * 11. FORM CHUNG
 * =======================================*/

.form-group {
    margin-bottom: 10px;
}

.form-group label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-muted);
    margin-bottom: 4px;
}

.form-group label::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: var(--radius-pill);
    background: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(248,113,113,0.35);
}

/* Input / select / textarea */
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    border-radius: 10px;
    border: 1px solid var(--color-border-soft);
    padding: 7px 10px;
    font-size: 0.9rem;
    outline: none;
    background: #ffffff;
    transition: border-color 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #9ca3af;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 1px rgba(248,113,113,0.35);
    background-color: #ffffff;
}

/* Input lỗi validation (được JS thêm class input-error) */
.input-error {
    border-color: #dc2626 !important;
    box-shadow: 0 0 0 1px rgba(220,38,38,0.35);
    background-color: #fff5f5;
}

/* =========================================
 * 12. PRODUCT LIST PAGE (FILTER + SORT)
 * =======================================*/

.page-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
}

/* Sidebar bộ lọc */
.filter-sidebar {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    padding: 14px 12px;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-border);
}

.filter-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.filter-group {
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 8px;
    margin-bottom: 4px;
}

.filter-group:last-child {
    border-bottom: none;
}

.filter-label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #6b7280;
    margin-bottom: 4px;
}

.filter-input {
    width: 100%;
    border-radius: 10px;
    border: 1px solid var(--color-border-soft);
    padding: 6px 10px;
    font-size: 0.9rem;
    outline: none;
}

.filter-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 1px #fecaca;
}

.filter-options {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-top: 2px;
}

.filter-options--multi {
    flex-wrap: wrap;
    flex-direction: row;
}

.filter-option {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.8rem;
    color: #4b5563;
}

.filter-option input {
    accent-color: var(--color-primary);
}

.filter-actions {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-top: 4px;
}

/* Chips hãng */
.filter-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 4px;
}

.chip {
    border-radius: var(--radius-pill);
    border: 1px solid var(--color-border);
    padding: 4px 8px;
    font-size: 0.75rem;
    color: var(--color-text);
    background: #ffffff;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 500;
}

.chip:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.chip--active {
    background: var(--color-primary-soft);
    border-color: var(--color-primary);
    color: #b91c1c;
    box-shadow: 0 6px 16px rgba(248,113,113,0.25);
}

/* Kết quả list */
.product-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* Thanh sắp xếp */
.sort-bar {
    background: var(--color-card);
    border-radius: 16px;
    padding: 8px 10px;
    box-shadow: 0 8px 20px rgba(15, 23, 42, 0.06);
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 0.85rem;
    border: 1px solid var(--color-border);
}

.sort-bar__left {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.sort-chip {
    border-radius: var(--radius-pill);
    background: #f3f4f6;
    padding: 3px 8px;
}

.sort-bar__right {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    justify-content: flex-start;
}

.sort-bar__label {
    color: var(--color-text-muted);
}

.sort-link {
    font-size: 0.8rem;
    padding: 4px 8px;
    border-radius: var(--radius-pill);
    border: 1px solid transparent;
    color: #374151;
    background: #f9fafb;
    transition: all var(--transition-fast);
}

.sort-link:hover {
    border-color: var(--color-border);
}

.sort-link--active {
    background: var(--color-primary-soft);
    border-color: var(--color-primary);
    color: #b91c1c;
    box-shadow: 0 6px 16px rgba(248,113,113,0.25);
}

/* =========================================
 * 13. PRODUCT DETAIL
 * =======================================*/

.product-detail {
    display: grid;
    grid-template-columns: minmax(0,1fr);
    gap: 16px;
}

.product-detail__image-main {
    position: relative;
    border-radius: 16px;
    background: var(--color-card);
    padding: 12px;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--color-border);
}

.product-detail__image-main img {
    border-radius: 12px;
    margin: 0 auto;
}

.product-detail__discount-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background: var(--color-primary);
    color: #fff;
    font-size: 0.8rem;
    padding: 4px 8px;
    border-radius: var(--radius-pill);
    box-shadow: 0 10px 24px rgba(248,113,113,0.4);
}

.product-detail__gallery {
    display: flex;
    gap: 8px;
    margin-top: 8px;
}

.product-detail__thumb {
    border-radius: 10px;
    border: 1px solid transparent;
    background: #ffffff;
    padding: 4px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.product-detail__thumb img {
    border-radius: 6px;
    max-height: 64px;
    object-fit: contain;
}

.product-detail__thumb.is-active,
.product-detail__thumb:hover {
    border-color: var(--color-primary);
    box-shadow: 0 6px 16px rgba(15, 23, 42, 0.12);
}

.product-detail__right {
    background: var(--color-card);
    border-radius: 16px;
    padding: 12px;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--color-border);
}

.product-detail__title {
    font-size: 1.2rem;
    margin-bottom: 4px;
    font-weight: 700;
}

.product-detail__meta {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 8px;
}

.product-detail__price-block {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

.product-detail__price {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-primary);
}

.product-detail__old {
    font-size: 0.85rem;
    color: #9ca3af;
    text-decoration: line-through;
}

.product-detail__badge-off {
    font-size: 0.8rem;
    background: var(--color-primary-soft);
    color: #b91c1c;
    padding: 4px 8px;
    border-radius: var(--radius-pill);
}

.product-detail__offers {
    margin-bottom: 10px;
    font-size: 0.85rem;
}

.product-detail__offers h3 {
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.product-detail__offers ul {
    margin-left: 18px;
}

.product-detail__offers li {
    margin-bottom: 3px;
}

.product-detail__offers i {
    color: #16a34a;
    margin-right: 4px;
}

.product-detail__options {
    margin-bottom: 10px;
}

.option-group {
    margin-bottom: 6px;
}

.option-label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: 4px;
}

.option-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.option-chip {
    border-radius: var(--radius-pill);
    border: 1px solid var(--color-border);
    padding: 4px 10px;
    font-size: 0.8rem;
    background: #fff;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 500;
}

.option-chip.is-active,
.option-chip:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: #fef2f2;
}

.product-detail__actions {
    margin-top: 8px;
}

.product-detail__cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 6px;
}

/* Tabs */
.product-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 8px;
}

.product-tab-btn {
    flex: 1;
    border-radius: var(--radius-pill);
    border: 1px solid var(--color-border);
    padding: 6px 10px;
    font-size: 0.85rem;
    background: #fff;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.product-tab-btn.is-active {
    border-color: var(--color-primary);
    background: var(--color-primary-soft);
    color: #b91c1c;
}

.product-tabs__content {
    background: var(--color-card);
    border-radius: 16px;
    padding: 10px 12px;
    box-shadow: 0 8px 20px rgba(15, 23, 42, 0.06);
    font-size: 0.9rem;
}

.product-tab-pane {
    display: none;
}

.product-tab-pane.is-active {
    display: block;
}

/* =========================================
 * 14. CART & CHECKOUT LAYOUT
 * =======================================*/

.page-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 16px;
}

/* Khi giỏ hàng trống */
.cart-empty {
    background: var(--color-card);
    border-radius: 16px;
    padding: 20px 18px;
    box-shadow: var(--shadow-soft);
    text-align: center;
    font-size: 0.95rem;
}

.cart-empty p {
    margin-bottom: 8px;
    color: #4b5563;
}

/* Layout 2 cột cho cart & checkout */
.cart-layout,
.checkout-layout {
    display: grid;
    grid-template-columns: minmax(0,1fr);
    gap: 16px;
}

/* Bảng giỏ hàng */
.cart-table-wrap {
    background: var(--color-card);
    border-radius: 18px;
    padding: 12px 12px 10px;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-border);
    overflow-x: auto;
}

/* Bảng giỏ hàng – table chung */
.cart-table {
    width: 100%;
    min-width: 560px;
    border-collapse: collapse;
    margin-bottom: 20px;
    font-size: 0.85rem;
}

.cart-table thead {
    background: #f9fafb;
}

.cart-table th,
.cart-table td {
    padding: 10px;
    border-bottom: 1px solid #f1f5f9;
    vertical-align: middle;
}

/* Giữ cột sản phẩm đủ rộng để ảnh không bị ép nhỏ */
.cart-table td:first-child {
    min-width: 180px;
}

.cart-table th {
    text-align: left;
    color: #6b7280;
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.cart-table tr:nth-child(even) td {
    background: #f9fafb;
}

.cart-table tr:nth-child(odd) td {
    background: #ffffff;
}

.cart-table tr:hover td {
    background: var(--color-primary-soft);
}

/* Ảnh trong cart */
.cart-thumb {
    width: 72px;
    height: 72px;
    border-radius: 10px;
    overflow: hidden;
    background: #f3f4f6;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.cart-thumb img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

/* Hàng giỏ hàng */
.cart-row:hover {
    background: #f9fafb;
}

/* Bộ tăng/giảm số lượng */
.qty-control {
    display: flex;
    align-items: center;
    gap: 6px;
}

.qty-btn {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 1px solid var(--color-border-soft);
    background: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-normal);
}

.qty-btn:hover {
    background: #e5e7eb;
}

.qty-input {
    width: 42px;
    border: 1px solid var(--color-border-soft);
    padding: 4px 0;
    text-align: center;
    border-radius: 6px;
    background: #fff;
}

/* Nút xóa */
.remove-btn {
    border: none;
    background: #fee2e2;
    color: #b91c1c;
    padding: 6px 10px;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition-normal);
    font-size: 0.85rem;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.remove-btn:hover {
    background: #fecaca;
}

/* Hành động update / clear */
.cart-table__actions {
    margin-top: 10px;
    display: flex;
    gap: 8px;
    justify-content: flex-end;
    flex-wrap: wrap;
}

/* Box tóm tắt giỏ hàng / checkout */
.cart-summary,
.checkout-summary {
    background: #ffffff;
    border-radius: 18px;
    border: 1px solid #e5e7eb;
    padding: 14px 14px 12px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 10px 24px rgba(15,23,42,0.08);
    font-size: 0.9rem;
}

.cart-summary h3,
.checkout-summary h3 {
    font-size: 1rem;
    margin-bottom: 8px;
    font-weight: 700;
}

/* Dòng tổng tiền */
.cart-summary__row,
.checkout-summary__row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 6px;
}

.cart-summary__row--total span:last-child,
.checkout-summary__row--total span:last-child {
    font-weight: 700;
    color: var(--color-primary);
    font-size: 1rem;
    text-transform: uppercase;
}

/* Giá tổng nổi bật */
.cart-total-value {
    font-weight: 700;
    color: var(--color-primary);
}

/* Form mã giảm giá */
.cart-coupon label {
    font-size: 0.8rem;
    margin-bottom: 2px;
    display: block;
}

.cart-coupon input {
    width: 100%;
    border-radius: var(--radius-pill);
    border: 1px solid var(--color-border-soft);
    padding: 6px 12px;
    font-size: 0.85rem;
}

/* Form checkout bên trái */
.checkout-form {
    background: #ffffff;
    border-radius: 18px;
    padding: 14px 14px 12px;
    box-shadow: var(--shadow-card);
    font-size: 0.9rem;
    border: 1px solid var(--color-border);
}

/* Alert */
.alert {
    border-radius: 12px;
    padding: 8px 10px;
    margin-bottom: 10px;
    font-size: 0.85rem;
}

.alert--error {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #b91c1c;
}

.alert--success {
    background: #ecfdf5;
    border: 1px solid #bbf7d0;
    color: #166534;
}

/* Danh sách sản phẩm trong tóm tắt checkout */
.checkout-summary__body {
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    padding: 6px 0 6px;
    max-height: 260px;
    overflow-y: auto;
    margin-bottom: 6px;
}

.checkout-item {
    display: flex;
    justify-content: space-between;
    gap: 8px;
    padding: 6px 0;
    border-bottom: 1px dashed var(--color-border);
}

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

.checkout-item__name {
    font-weight: 500;
    font-size: 0.9rem;
}

.checkout-item__meta {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-top: 2px;
}

.checkout-item__right {
    text-align: right;
    font-size: 0.8rem;
}

.checkout-item__price {
    font-weight: 600;
    color: var(--color-primary);
}

.checkout-item__total {
    margin-top: 2px;
}

.checkout-summary__footer {
    margin-top: 4px;
}

/* Header cart page */
.cart-page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

/* =========================================
 * 15. RESPONSIVE
 * =======================================*/

/* >= 768px (Tablet trở lên) */
@media (min-width: 768px) {
    .top-bar__inner {
        grid-template-columns: auto 1fr auto;
    }

    .product-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .promo-cards {
        grid-template-columns: 1fr;
    }

    .site-footer__top {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    /* Ẩn nút 3 gạch ở tablet & desktop */
    .icon-btn--menu {
        display: none;
    }
}

/* >= 992px (Desktop / grid 2 cột) */
@media (min-width: 992px) {
    .page-grid {
        grid-template-columns: 260px minmax(0, 1fr);
        align-items: flex-start;
    }

    .sort-bar {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }

    .cart-layout,
    .checkout-layout {
        grid-template-columns: minmax(0,1.5fr) minmax(0,0.9fr);
    }

    .product-detail {
        grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
        align-items: start;
    }
}

/* >= 1024px (Desktop lớn) */
@media (min-width: 1024px) {
    .top-bar__inner {
        gap: 16px;
    }

    .product-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .featured-cats {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

/* Tablet & small desktop: 768px - 1023px */
@media (max-width: 1023.98px) {
    .top-bar__inner {
        grid-template-columns: auto 1fr auto;
        gap: 10px;
    }

    /* Ẩn top-actions và user area, dùng menu 3 gạch */
    .top-actions,
    .top-actions__item,
    .top-actions__item--hotline,
    .user-area,
    .user-area__info,
    .user-area__links,
    .top-bar .btn.btn--ghost,
    .top-bar .btn.btn--primary {
        display: none !important;
    }

    .icon-btn--menu {
        display: inline-flex !important;
    }

    /* Thu gọn hero trên tablet */
    .hero-grid {
        grid-template-columns: minmax(0, 1fr);
    }
}

/* Mobile-specific: < 768px */
@media (max-width: 767.98px) {
    .cart-table td:first-child {
        min-width: 140px;
    }

    .top-bar__inner {
        grid-template-columns: auto 1fr auto auto;
        gap: 8px;
    }

    /* Ẩn các mục top actions trên mobile (sẽ hiện trong menu 3 gạch) */
    .top-actions {
        display: none !important;
    }

    .top-actions__item {
        display: none !important;
    }

    .top-actions__item--hotline {
        display: none !important;
    }

    /* Ẩn user area buttons trên mobile (sẽ hiện trong menu 3 gạch) */
    .user-area {
        display: none !important;
    }

    .user-area__info {
        display: none !important;
    }

    .user-area__links {
        display: none !important;
    }

    .top-bar .btn.btn--ghost,
    .top-bar .btn.btn--primary {
        display: none !important;
    }

    /* Hiện nút menu 3 gạch trên mobile */
    .icon-btn--menu {
        display: inline-flex !important;
        transition: all 0.3s ease;
    }

    .icon-btn--menu:active {
        transform: scale(0.9);
    }

    /* Logo compress */
    .logo__text {
        font-size: 1.05rem;
    }

    /* Search bar compact */
    .search-bar {
        padding: 2px;
        margin: 0 4px;
    }

    .search-bar__input {
        padding: 8px 10px;
        font-size: 0.85rem;
        min-width: 100px;
    }

    .search-bar__btn {
        width: 36px;
        min-width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }

    /* Hero grid */
    .hero-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .hero-slide.is-active {
        grid-template-columns: 1fr;
    }

    .hero-slide__image {
        order: -1;
    }

    .site-footer {
        text-align: left;
    }

    /* Mobile drawer animations */
    .mobile-drawer__overlay {
        animation: fadeIn 0.3s ease-out;
    }

    .mobile-drawer__panel {
        animation: slideInFromLeft 0.3s ease-out;
    }

    @keyframes fadeIn {
        from {
            opacity: 0;
        }
        to {
            opacity: 1;
        }
    }

    @keyframes slideInFromLeft {
        from {
            transform: translateX(-100%);
        }
        to {
            transform: translateX(0);
        }
    }

    /* Mobile nav links */
    .mobile-links a,
    .mobile-nav a {
        transition: all 0.15s ease;
    }

    .mobile-links a:active,
    .mobile-nav a:active,
    .mobile-user__actions .btn:active {
        opacity: 0.8;
        transform: scale(0.98);
    }

    /* Cart image thu nhỏ nhưng vẫn hiển thị */
    .cart-thumb {
        width: 60px;
        height: 60px;
    }
}