@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:ital,wght@0,400;0,500;0,600;0,700;1,400&family=Inter:wght@400;500;600;700&family=Playfair+Display:ital,wght@0,500;0,600;0,700;1,400;1,600&display=swap');

:root {
  /* Extracted Design Tokens from Reference Board (Bang mau & Font chu) */
  --color-crimson: #8B1E1E;
  --color-crimson-hover: #701616;
  --color-crimson-active: #5A1111;
  --color-crimson-soft: #F7ECEB;
  --color-crimson-border: rgba(139, 30, 30, 0.35);

  --color-ink: #1A1A1A;
  --color-ink-secondary: #4A443E;
  --color-ink-muted: #787067;

  --color-rice-paper: #FAF7F2;
  --color-rice-paper-alt: #F4EFE6;
  --color-sand: #EADCCB;
  --color-gold: #C8A96A;
  --color-gold-bright: #D69E2E;

  --color-surface: #FFFFFF;
  --color-border: #E6DFD3;
  --color-border-strong: #D5CBB8;

  --color-zalo: #0068FF;
  --color-success: #2B6CB0;
  --color-in-stock: #387648;

  --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-sans: 'Inter', 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, sans-serif;

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

  --shadow-card: 0 4px 20px -4px rgba(26, 20, 16, 0.05), 0 1px 3px rgba(26, 20, 16, 0.03);
  --shadow-card-hover: 0 12px 28px -6px rgba(26, 20, 16, 0.10), 0 2px 6px rgba(139, 30, 30, 0.06);
  --shadow-elevated: 0 20px 44px -12px rgba(20, 14, 10, 0.16);

  --ease-out-expo: cubic-bezier(0.22, 1, 0.36, 1);
  --container-max: 1180px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-rice-paper);
  color: var(--color-ink);
  line-height: 1.55;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
}

/* Subtle fixed rice-paper texture overlay (GPU-safe fixed pseudo-element) */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 40;
  pointer-events: none;
  opacity: 0.022;
  background-image: radial-gradient(rgba(26, 20, 16, 0.7) 0.65px, transparent 0.65px);
  background-size: 14px 14px;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.22s var(--ease-out-expo);
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

/* Layout Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: 24px;
}

/* Typography Utilities */
h1, h2, h3, h4, .font-serif {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--color-ink);
}

.tabular-nums {
  font-variant-numeric: tabular-nums;
}

/* ==========================================================================
   1. GLOBAL HEADER & NAVIGATION
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background-color: rgba(250, 247, 242, 0.96);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  height: 74px;
  display: flex;
  align-items: center;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

/* Brand Seal Logo */
.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-logo__seal {
  width: 38px;
  height: 38px;
  background-color: var(--color-crimson);
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FAF7F2;
  box-shadow: inset 0 0 0 2px rgba(250, 247, 242, 0.22), 0 2px 6px rgba(139, 30, 30, 0.22);
  flex-shrink: 0;
}

.brand-logo__seal svg {
  width: 24px;
  height: 24px;
}

.brand-logo__text {
  display: flex;
  flex-direction: column;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.12;
  letter-spacing: 0.03em;
  color: var(--color-ink);
  text-transform: uppercase;
}

.brand-logo__text span:first-child {
  font-size: 0.88rem;
}

/* Primary Nav */
.primary-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.primary-nav__link {
  position: relative;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-ink-secondary);
  padding: 8px 0;
  transition: color 0.2s var(--ease-out-expo);
}

.primary-nav__link:hover,
.primary-nav__link.is-active {
  color: var(--color-crimson);
  font-weight: 600;
}

.primary-nav__link.is-active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background-color: var(--color-crimson);
  border-radius: 2px;
}

/* Header Action Icons */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header-action-btn {
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-ink);
  transition: background-color 0.2s var(--ease-out-expo), color 0.2s var(--ease-out-expo);
}

.header-action-btn:hover {
  background-color: var(--color-rice-paper-alt);
  color: var(--color-crimson);
}

.header-action-btn svg {
  width: 20px;
  height: 20px;
  stroke-width: 1.75;
}

.cart-badge {
  position: absolute;
  top: 4px;
  right: 3px;
  min-width: 17px;
  height: 17px;
  padding: 0 4px;
  border-radius: 999px;
  background-color: var(--color-crimson);
  color: #FFFFFF;
  font-size: 0.6875rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.mobile-menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-ink);
}

/* ==========================================================================
   2. MOBILE NAVIGATION DRAWER (Matches "Menu (mobile)" Reference Screen)
   ========================================================================== */
.mobile-drawer-backdrop {
  position: fixed;
  inset: 0;
  z-index: 48;
  background: rgba(20, 15, 12, 0.52);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s var(--ease-out-expo);
}

.mobile-drawer {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: min(340px, 88vw);
  z-index: 49;
  background-color: var(--color-rice-paper);
  border-right: 1px solid var(--color-border);
  box-shadow: var(--shadow-elevated);
  display: flex;
  flex-direction: column;
  transform: translateX(-102%);
  transition: transform 0.35s var(--ease-out-expo);
}

body.drawer-open .mobile-drawer-backdrop {
  opacity: 1;
  pointer-events: auto;
}

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

.mobile-drawer__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--color-border);
}

.mobile-drawer__close {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-ink-secondary);
}

.mobile-drawer__nav {
  flex: 1;
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
}

.mobile-drawer__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 12px;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-ink);
}

.mobile-drawer__link.is-active {
  color: var(--color-crimson);
  font-weight: 600;
}

.mobile-drawer__link-inner {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.mobile-drawer__dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background-color: var(--color-crimson);
}

.mobile-drawer__footer {
  padding: 16px 20px 24px;
  border-top: 1px solid var(--color-border);
  background-color: var(--color-rice-paper-alt);
}

.mobile-drawer__account {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-ink-secondary);
}

/* ==========================================================================
   3. BUTTON SYSTEM (Consistent Tactile States & Contrast)
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  line-height: 1.2;
  padding: 12px 22px;
  border-radius: var(--radius-md);
  white-space: nowrap;
  transition: background-color 0.22s var(--ease-out-expo),
              color 0.22s var(--ease-out-expo),
              border-color 0.22s var(--ease-out-expo),
              transform 0.15s var(--ease-out-expo),
              box-shadow 0.22s var(--ease-out-expo);
}

.btn:active {
  transform: translateY(1px) scale(0.99);
}

.btn--primary {
  background-color: var(--color-crimson);
  color: #FFFFFF;
  border: 1px solid var(--color-crimson);
  box-shadow: 0 2px 8px rgba(139, 30, 30, 0.22);
}

.btn--primary:hover {
  background-color: var(--color-crimson-hover);
  border-color: var(--color-crimson-hover);
  box-shadow: 0 6px 16px rgba(139, 30, 30, 0.30);
}

.btn--outline-crimson {
  background-color: transparent;
  color: var(--color-crimson);
  border: 1px solid rgba(139, 30, 30, 0.42);
}

.btn--outline-crimson:hover {
  background-color: var(--color-crimson);
  color: #FFFFFF;
  border-color: var(--color-crimson);
}

.btn--outline-dark {
  background-color: #FFFFFF;
  color: var(--color-ink);
  border: 1px solid var(--color-border-strong);
}

.btn--outline-dark:hover {
  border-color: var(--color-ink);
  background-color: var(--color-rice-paper-alt);
}

.btn--ghost-light {
  background-color: rgba(139, 30, 30, 0.78);
  color: #FFFFFF;
  border: 1px solid rgba(200, 169, 106, 0.45);
}

.btn--ghost-light:hover {
  background-color: var(--color-crimson);
  border-color: var(--color-gold);
}

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

.btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* ==========================================================================
   4. HERO & PAGE BANNERS
   ========================================================================== */
.hero-home {
  position: relative;
  background-color: #160E0B;
  background-image: url('../assets/images/hero-home.jpg');
  background-size: cover;
  background-position: center right;
  min-height: 440px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-home::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(16, 10, 8, 0.92) 0%, rgba(20, 12, 9, 0.78) 38%, rgba(20, 12, 9, 0.15) 68%, transparent 100%);
  pointer-events: none;
}

.hero-home__content {
  position: relative;
  z-index: 2;
  max-width: 500px;
  padding-block: 56px;
  color: #FAF7F2;
}

.hero-home__title {
  font-family: var(--font-display);
  font-size: clamp(2.15rem, 4vw, 3.1rem);
  font-weight: 700;
  line-height: 1.16;
  color: #FAF7F2;
  margin-bottom: 16px;
}

.hero-home__subtitle {
  font-size: 1.05rem;
  color: rgba(250, 247, 242, 0.86);
  line-height: 1.55;
  margin-bottom: 28px;
}

/* Subpage Hero Banners (Baijiu, Moutai, Contact, Knowledge) */
.page-hero {
  position: relative;
  background-color: #170F0C;
  background-size: cover;
  background-position: center right;
  min-height: 210px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(18, 11, 9, 0.90) 0%, rgba(18, 11, 9, 0.68) 45%, rgba(18, 11, 9, 0.12) 78%, transparent 100%);
  pointer-events: none;
}

.page-hero--baijiu {
  background-image: url('../assets/images/hero-baijiu.jpg');
}

.page-hero--moutai {
  background-image: url('../assets/images/hero-moutai.jpg');
  min-height: 250px;
}

.page-hero--contact {
  background-image: url('../assets/images/hero-contact.jpg');
  min-height: 220px;
}

.page-hero__content {
  position: relative;
  z-index: 2;
  max-width: 540px;
  padding-block: 36px;
  color: #FAF7F2;
}

.page-hero__title {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 3.2vw, 2.5rem);
  color: #FAF7F2;
  margin-bottom: 10px;
}

.page-hero__subtitle {
  font-size: 0.98rem;
  color: rgba(250, 247, 242, 0.85);
  line-height: 1.5;
}

/* Breadcrumbs */
.breadcrumb-bar {
  padding: 16px 0;
  font-size: 0.85rem;
  color: var(--color-ink-muted);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.breadcrumb-list a:hover {
  color: var(--color-crimson);
}

.breadcrumb-list .current {
  color: var(--color-ink);
  font-weight: 500;
}

/* ==========================================================================
   5. HOME: 5-CATEGORY ICON STRIP
   ========================================================================== */
.category-strip-section {
  padding-block: 26px 12px;
}

.category-strip {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.category-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 22px 14px;
  border-right: 1px solid var(--color-border);
  transition: background-color 0.22s var(--ease-out-expo), transform 0.22s var(--ease-out-expo);
}

.category-item:last-child {
  border-right: none;
}

.category-item:hover,
.category-item.is-active {
  background-color: var(--color-crimson-soft);
}

.category-item__icon {
  width: 42px;
  height: 42px;
  margin-bottom: 10px;
  color: var(--color-crimson);
  display: flex;
  align-items: center;
  justify-content: center;
}

.category-item__icon svg {
  width: 32px;
  height: 32px;
  stroke-width: 1.5;
}

.category-item__title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-ink);
  line-height: 1.25;
}

.category-item__sub {
  font-size: 0.78rem;
  color: var(--color-ink-muted);
  margin-top: 2px;
}

/* ==========================================================================
   6. PRODUCT CARDS & GRIDS
   ========================================================================== */
.section-block {
  padding-block: 32px;
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 22px;
  gap: 16px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 2.4vw, 1.85rem);
  color: var(--color-ink);
}

.section-link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-crimson);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.section-link:hover {
  text-decoration: underline;
}

.product-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.product-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.product-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.product-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 12px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-card);
  transition: transform 0.28s var(--ease-out-expo), box-shadow 0.28s var(--ease-out-expo), border-color 0.28s var(--ease-out-expo);
}

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

.product-card__media {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: #1B120E;
  aspect-ratio: 1.08 / 1;
  margin-bottom: 12px;
}

.product-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s var(--ease-out-expo);
}

.product-card:hover .product-card__media img {
  transform: scale(1.04);
}

.product-card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
}

.product-card__title {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 4px;
  line-height: 1.3;
}

.product-card__title a:hover {
  color: var(--color-crimson);
}

.product-card__meta {
  font-size: 0.78rem;
  color: var(--color-ink-muted);
  margin-bottom: 6px;
}

.rating-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
}

.stars {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  color: var(--color-gold-bright);
}

.stars svg {
  width: 13px;
  height: 13px;
  fill: currentColor;
}

.rating-count {
  font-size: 0.76rem;
  color: var(--color-ink-muted);
}

.product-card__price-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-top: auto;
  margin-bottom: 12px;
}

.price-current {
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--color-crimson);
  font-variant-numeric: tabular-nums;
}

.price-old {
  font-size: 0.82rem;
  color: var(--color-ink-muted);
  text-decoration: line-through;
  font-variant-numeric: tabular-nums;
}

.product-card .btn {
  padding: 9px 14px;
  font-size: 0.84rem;
}

/* ==========================================================================
   7. HOME: HERITAGE CULTURE BANNER & 3-USP TRUST BAR
   ========================================================================== */
.culture-banner {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: #1A130F;
  background-image: url('../assets/images/banner-culture.jpg');
  background-size: cover;
  background-position: center right;
  min-height: 245px;
  display: flex;
  align-items: center;
  padding: 36px 44px;
  box-shadow: var(--shadow-card);
}

.culture-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(18, 12, 9, 0.90) 0%, rgba(18, 12, 9, 0.72) 46%, rgba(18, 12, 9, 0.10) 78%, transparent 100%);
  pointer-events: none;
}

.culture-banner__content {
  position: relative;
  z-index: 2;
  max-width: 460px;
  color: #FAF7F2;
}

.culture-banner__title {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 2.6vw, 2.05rem);
  color: #FAF7F2;
  margin-bottom: 12px;
}

.culture-banner__desc {
  font-size: 0.95rem;
  color: rgba(250, 247, 242, 0.86);
  line-height: 1.6;
  margin-bottom: 22px;
}

/* 3-Column USP Trust Bar */
.usp-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding: 28px 0 36px;
  border-top: 1px solid var(--color-border);
  margin-top: 16px;
}

.usp-item {
  display: flex;
  align-items: center;
  gap: 14px;
}

.usp-item__icon {
  width: 46px;
  height: 46px;
  border-radius: 999px;
  background-color: var(--color-crimson-soft);
  border: 1px solid rgba(139, 30, 30, 0.18);
  color: var(--color-crimson);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.usp-item__icon svg {
  width: 22px;
  height: 22px;
}

.usp-item__title {
  font-family: var(--font-display);
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 2px;
}

.usp-item__desc {
  font-size: 0.82rem;
  color: var(--color-ink-muted);
}

/* ==========================================================================
   8. SCREEN 2: CATEGORY ARCHIVE (SAN-PHAM.HTML)
   ========================================================================== */
.catalog-layout {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 28px;
  align-items: start;
  padding-bottom: 48px;
}

.filter-sidebar {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-card);
}

.filter-sidebar__heading {
  font-family: var(--font-display);
  font-size: 1.2rem;
  padding-bottom: 14px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.filter-group {
  padding-bottom: 18px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--color-border);
}

.filter-group:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.filter-group__title {
  font-family: var(--font-display);
  font-size: 0.96rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-ink);
}

.filter-option {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--color-ink-secondary);
  margin-bottom: 9px;
  cursor: pointer;
}

.filter-option:last-child {
  margin-bottom: 0;
}

.filter-option input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--color-crimson);
  border-radius: 3px;
  cursor: pointer;
}

.catalog-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 16px;
  flex-wrap: wrap;
}

.catalog-toolbar__title {
  font-family: var(--font-display);
  font-size: 1.35rem;
}

.catalog-sort {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--color-ink-secondary);
}

.catalog-sort select {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  padding: 8px 32px 8px 12px;
  font-weight: 500;
  color: var(--color-ink);
  cursor: pointer;
}

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 32px;
}

.page-btn {
  min-width: 36px;
  height: 36px;
  padding: 0 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  color: var(--color-ink-secondary);
  font-size: 0.875rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s var(--ease-out-expo);
}

.page-btn:hover {
  border-color: var(--color-crimson);
  color: var(--color-crimson);
}

.page-btn.is-active {
  background-color: var(--color-crimson);
  border-color: var(--color-crimson);
  color: #FFFFFF;
}

/* ==========================================================================
   9. SCREEN 3: SINGLE PRODUCT DETAIL (CHI-TIET-SAN-PHAM.HTML)
   ========================================================================== */
.product-detail-section {
  padding-bottom: 56px;
}

.product-detail-top {
  display: grid;
  grid-template-columns: 460px 1fr;
  gap: 40px;
  align-items: start;
  margin-bottom: 32px;
}

.product-gallery__main {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: #1B120E;
  border: 1px solid var(--color-border);
  aspect-ratio: 1 / 1;
  margin-bottom: 12px;
  box-shadow: var(--shadow-card);
}

.product-gallery__main img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-gallery__thumbs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.gallery-thumb {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 2px solid transparent;
  background-color: #1B120E;
  aspect-ratio: 1.05 / 1;
  opacity: 0.72;
  transition: opacity 0.2s, border-color 0.2s;
}

.gallery-thumb.is-active,
.gallery-thumb:hover {
  border-color: var(--color-crimson);
  opacity: 1;
}

.gallery-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-summary__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 2.8vw, 2.25rem);
  margin-bottom: 10px;
}

.product-summary__price-box {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 14px 0 20px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--color-border);
}

.product-summary__price {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-crimson);
  font-variant-numeric: tabular-nums;
}

.product-summary__old-price {
  font-size: 1.05rem;
  color: var(--color-ink-muted);
  text-decoration: line-through;
  font-variant-numeric: tabular-nums;
}

.discount-badge {
  background-color: var(--color-crimson);
  color: #FFFFFF;
  font-size: 0.76rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
}

.spec-list {
  display: grid;
  grid-template-columns: 130px 1fr;
  row-gap: 10px;
  font-size: 0.92rem;
  margin-bottom: 22px;
}

.spec-list dt {
  color: var(--color-ink-muted);
}

.spec-list dd {
  font-weight: 600;
  color: var(--color-ink);
}

.qty-block {
  margin-bottom: 20px;
}

.qty-block__label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.qty-stepper {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  overflow: hidden;
}

.qty-stepper__btn {
  width: 38px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--color-ink-secondary);
  transition: background-color 0.15s;
}

.qty-stepper__btn:hover {
  background-color: var(--color-rice-paper-alt);
  color: var(--color-crimson);
}

.qty-stepper__input {
  width: 48px;
  height: 36px;
  text-align: center;
  border: none;
  border-inline: 1px solid var(--color-border);
  font-weight: 600;
  font-size: 0.92rem;
  background: transparent;
}

.product-summary__actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.product-summary__actions .btn {
  padding: 14px 24px;
  font-size: 0.96rem;
}

/* Product Tabs */
.product-tabs-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px 32px;
  box-shadow: var(--shadow-card);
  margin-top: 12px;
}

.tabs-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 24px;
}

.tab-btn {
  position: relative;
  padding: 10px 0 14px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-ink-muted);
}

.tab-btn.is-active {
  color: var(--color-crimson);
  font-weight: 600;
}

.tab-btn.is-active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background-color: var(--color-crimson);
}

.tab-panel {
  display: none;
}

.tab-panel.is-active {
  display: block;
}

.tab-panel h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.tab-panel p {
  color: var(--color-ink-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
  max-width: 72ch;
}

.bullet-specs {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.bullet-specs li {
  position: relative;
  padding-left: 18px;
  color: var(--color-ink-secondary);
}

.bullet-specs li::before {
  content: "•";
  position: absolute;
  left: 2px;
  color: var(--color-crimson);
  font-weight: 700;
}

/* ==========================================================================
   10. SCREEN 4: CART PAGE (GIO-HANG.HTML)
   ========================================================================== */
.cart-page-wrap {
  max-width: 820px;
  margin-inline: auto;
  padding-block: 32px 64px;
}

.cart-page-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 2.8vw, 2.1rem);
  margin-bottom: 22px;
}

.cart-items-box {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  margin-bottom: 24px;
}

.cart-item {
  display: grid;
  grid-template-columns: 108px 1fr auto;
  gap: 20px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--color-border);
  align-items: center;
  position: relative;
}

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

.cart-item__thumb {
  width: 108px;
  height: 98px;
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: #1B120E;
}

.cart-item__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cart-item__info h3 {
  font-family: var(--font-display);
  font-size: 1.08rem;
  margin-bottom: 6px;
}

.cart-item__unit-price {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-crimson);
  margin-bottom: 10px;
  font-variant-numeric: tabular-nums;
}

.cart-item__controls {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.stock-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.8rem;
  color: var(--color-ink-muted);
}

.stock-pill svg {
  width: 14px;
  height: 14px;
  color: var(--color-in-stock);
}

.cart-item__right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: space-between;
  align-self: stretch;
}

.cart-item__remove {
  color: var(--color-ink-muted);
  font-size: 1.2rem;
  line-height: 1;
  padding: 4px;
}

.cart-item__remove:hover {
  color: var(--color-crimson);
}

.cart-item__subtotal {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-ink);
  font-variant-numeric: tabular-nums;
}

.cart-totals-box {
  padding: 8px 4px 20px;
}

.totals-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 0;
  font-size: 0.95rem;
  color: var(--color-ink-secondary);
}

.totals-row--grand {
  margin-top: 10px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border-strong);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-ink);
}

.totals-row--grand .grand-amount {
  font-size: 1.5rem;
  color: var(--color-crimson);
  font-variant-numeric: tabular-nums;
}

.cart-cta-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.cart-cta-grid .btn {
  padding: 14px 20px;
  font-size: 0.95rem;
}

.shipping-perk-banner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 24px;
  border-radius: var(--radius-lg);
  background: linear-gradient(90deg, #F8EFEA 0%, #F5EAE2 100%);
  border: 1px solid #E8D5C8;
  overflow: hidden;
}

.shipping-perk-banner__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: rgba(139, 30, 30, 0.1);
  color: var(--color-crimson);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.shipping-perk-banner__art {
  position: absolute;
  right: 12px;
  bottom: -4px;
  width: 140px;
  height: 70px;
  opacity: 0.25;
  pointer-events: none;
}

/* ==========================================================================
   11. SCREEN 5: CHECKOUT PAGE (THANH-TOAN.HTML)
   ========================================================================== */
.checkout-layout {
  display: grid;
  grid-template-columns: 1.25fr 0.95fr;
  gap: 28px;
  align-items: start;
  padding-bottom: 64px;
}

.checkout-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 26px 28px;
  box-shadow: var(--shadow-card);
}

.checkout-step-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin-bottom: 18px;
  color: var(--color-ink);
}

.form-group {
  margin-bottom: 16px;
}

.form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-ink-secondary);
  margin-bottom: 6px;
}

.form-label .req {
  color: var(--color-crimson);
}

.form-control {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  font-size: 0.92rem;
  color: var(--color-ink);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
  outline: none;
  border-color: var(--color-crimson);
  box-shadow: 0 0 0 3px rgba(139, 30, 30, 0.12);
}

textarea.form-control {
  min-height: 88px;
  resize: vertical;
}

.checkout-divider {
  height: 1px;
  background-color: var(--color-border);
  margin: 24px 0;
}

.radio-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.radio-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.92rem;
  cursor: pointer;
  padding: 6px 0;
}

.radio-row__left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.radio-row input[type="radio"] {
  width: 17px;
  height: 17px;
  accent-color: var(--color-crimson);
  cursor: pointer;
}

.radio-row__price {
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* Order Summary Right Column */
.mini-order-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-bottom: 18px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.mini-order-item {
  display: flex;
  align-items: center;
  gap: 14px;
}

.mini-order-item__img {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background-color: #1B120E;
  flex-shrink: 0;
}

.mini-order-item__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.mini-order-item__title {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.mini-order-item__price {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--color-ink);
  font-variant-numeric: tabular-nums;
}

.mini-order-item__price span {
  font-weight: 400;
  color: var(--color-ink-muted);
  margin-left: 4px;
}

.security-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--color-border);
  font-size: 0.8rem;
  color: var(--color-ink-muted);
}

.security-note svg {
  width: 18px;
  height: 18px;
  color: var(--color-ink-secondary);
  flex-shrink: 0;
}

/* ==========================================================================
   12. SCREEN 6: BRAND / COLLECTION PAGE (THUONG-HIEU.HTML)
   ========================================================================== */
.brand-layout {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 28px;
  align-items: start;
  padding-block: 28px 56px;
}

.brand-nav-list {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.brand-nav-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.92rem;
  color: var(--color-ink-secondary);
  transition: all 0.2s var(--ease-out-expo);
}

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

.brand-nav-item:hover,
.brand-nav-item.is-active {
  background-color: var(--color-crimson-soft);
  color: var(--color-crimson);
  font-weight: 600;
  border-left: 3px solid var(--color-crimson);
}

.moutai-story-banner {
  position: relative;
  margin-top: 26px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: #220D0B;
  background-image: url('../assets/images/banner-moutai-story.jpg');
  background-size: cover;
  background-position: center right;
  padding: 32px 36px;
  min-height: 185px;
  display: flex;
  align-items: center;
  box-shadow: var(--shadow-card);
}

.moutai-story-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(28, 10, 8, 0.92) 0%, rgba(28, 10, 8, 0.75) 55%, rgba(28, 10, 8, 0.15) 82%, transparent 100%);
  pointer-events: none;
}

.moutai-story-banner__content {
  position: relative;
  z-index: 2;
  max-width: 430px;
  color: #FAF7F2;
}

.moutai-story-banner__title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: #FAF7F2;
  margin-bottom: 16px;
  line-height: 1.35;
}

/* ==========================================================================
   13. SCREEN 7: KNOWLEDGE / BLOG HUB & ARTICLE READER (KIEN-THUC.HTML)
   ========================================================================== */
.knowledge-split-layout {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 32px;
  align-items: start;
  padding-block: 24px 64px;
}

.knowledge-hub-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.knowledge-hero-box {
  position: relative;
  background-color: #16110E;
  background-image: url('../assets/images/hero-knowledge.jpg');
  background-size: cover;
  background-position: center right;
  padding: 36px 28px;
  min-height: 200px;
  display: flex;
  align-items: center;
}

.knowledge-hero-box::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(18, 13, 10, 0.88) 0%, rgba(18, 13, 10, 0.55) 60%, rgba(18, 13, 10, 0.15) 100%);
}

.knowledge-hero-box__content {
  position: relative;
  z-index: 2;
  max-width: 340px;
  color: #FAF7F2;
}

.knowledge-hero-box__title {
  font-family: var(--font-display);
  font-size: 1.85rem;
  color: #FAF7F2;
  margin-bottom: 8px;
}

.knowledge-hero-box__desc {
  font-size: 0.88rem;
  color: rgba(250, 247, 242, 0.85);
  line-height: 1.5;
}

.knowledge-hub-body {
  padding: 20px 24px 28px;
}

.article-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.article-list-item {
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 16px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--color-border);
  align-items: center;
  cursor: pointer;
  transition: background-color 0.2s;
}

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

.article-list-item__thumb {
  width: 112px;
  height: 84px;
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: #1B120E;
}

.article-list-item__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-list-item__title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 6px;
  line-height: 1.35;
}

.article-list-item:hover .article-list-item__title,
.article-list-item.is-active .article-list-item__title {
  color: var(--color-crimson);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.78rem;
  color: var(--color-ink-muted);
}

.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* Right Column: Full Article Reader */
.article-reader-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 26px 30px;
  box-shadow: var(--shadow-card);
}

.article-reader__title {
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 2.2vw, 1.8rem);
  margin-bottom: 12px;
  line-height: 1.28;
}

.article-reader__hero {
  border-radius: var(--radius-md);
  overflow: hidden;
  margin: 18px 0 20px;
  aspect-ratio: 1.25 / 1;
  background-color: #1B120E;
}

.article-reader__hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-reader__content p {
  font-size: 0.94rem;
  color: var(--color-ink-secondary);
  line-height: 1.72;
  margin-bottom: 16px;
}

.article-reader__content h2 {
  font-family: var(--font-display);
  font-size: 1.22rem;
  margin: 20px 0 10px;
}

/* ==========================================================================
   14. SCREEN 8: CONTACT & ZALO CONSULTATION (LIEN-HE.HTML)
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 32px;
  padding-block: 32px 28px;
  align-items: start;
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 22px;
  margin-top: 18px;
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.contact-info-item__icon {
  width: 38px;
  height: 38px;
  border-radius: 999px;
  background-color: var(--color-crimson-soft);
  color: var(--color-crimson);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.contact-info-item__icon svg {
  width: 18px;
  height: 18px;
}

.contact-info-item__title {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 3px;
}

.contact-info-item__text {
  font-size: 0.9rem;
  color: var(--color-ink-secondary);
  line-height: 1.5;
}

.zalo-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 22px 28px;
  margin-bottom: 48px;
  box-shadow: var(--shadow-card);
}

.zalo-card__left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.zalo-badge {
  width: 52px;
  height: 52px;
  border-radius: 999px;
  background-color: var(--color-zalo);
  color: #FFFFFF;
  font-weight: 800;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 104, 255, 0.25);
  flex-shrink: 0;
}

/* ==========================================================================
   15. GLOBAL DARK FOOTER
   ========================================================================== */
.site-footer {
  margin-top: auto;
  background-color: #161413;
  color: rgba(250, 247, 242, 0.78);
  padding: 48px 0 28px;
  border-top: 1px solid rgba(200, 169, 106, 0.2);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-footer .brand-logo__text {
  color: #FAF7F2;
}

.site-footer__tagline {
  font-size: 0.875rem;
  color: rgba(250, 247, 242, 0.68);
  margin: 14px 0 18px;
  line-height: 1.6;
}

.footer-socials {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-social-link {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: rgba(250, 247, 242, 0.8);
  transition: all 0.2s;
}

.footer-social-link:hover {
  background-color: var(--color-crimson);
  border-color: var(--color-crimson);
  color: #FFFFFF;
}

.footer-col__title {
  font-family: var(--font-display);
  font-size: 1rem;
  color: #FAF7F2;
  margin-bottom: 14px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 9px;
  font-size: 0.875rem;
}

.footer-links a:hover {
  color: var(--color-gold);
}

.site-footer__bottom {
  padding-top: 20px;
  text-align: center;
  font-size: 0.8rem;
  color: rgba(250, 247, 242, 0.5);
}

/* ==========================================================================
   16. FLOATING DEV BAR & TOAST NOTIFICATION
   ========================================================================== */
.dev-switcher {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 45;
  background: rgba(22, 20, 19, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(200, 169, 106, 0.35);
  border-radius: 999px;
  padding: 6px 10px;
  display: flex;
  align-items: center;
  gap: 4px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
  max-width: 96vw;
  overflow-x: auto;
}

.dev-switcher__link {
  padding: 6px 11px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 500;
  color: rgba(250, 247, 242, 0.78);
  white-space: nowrap;
  transition: all 0.18s;
}

.dev-switcher__link:hover {
  color: #FFFFFF;
  background: rgba(255, 255, 255, 0.08);
}

.dev-switcher__link.is-active {
  background-color: var(--color-crimson);
  color: #FFFFFF;
  font-weight: 600;
}

.dev-switcher__link--board {
  background-color: rgba(200, 169, 106, 0.18);
  color: var(--color-gold);
  border: 1px solid rgba(200, 169, 106, 0.4);
}

.toast-notification {
  position: fixed;
  top: 88px;
  right: 24px;
  z-index: 50;
  background-color: #1A1A1A;
  color: #FAF7F2;
  border-left: 4px solid var(--color-crimson);
  padding: 14px 20px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-elevated);
  font-size: 0.88rem;
  font-weight: 500;
  transform: translateY(-16px);
  opacity: 0;
  pointer-events: none;
  transition: all 0.28s var(--ease-out-expo);
}

.toast-notification.is-visible {
  transform: translateY(0);
  opacity: 1;
}

/* Mobile Sticky Bottom Action Bar (Product Detail) */
.mobile-sticky-bar {
  display: none;
}

/* ==========================================================================
   17. RESPONSIVE BREAKPOINTS (< 1024px & < 768px Mobile Screens)
   ========================================================================== */
@media (max-width: 1024px) {
  .product-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .product-detail-top {
    grid-template-columns: 1fr;
  }
  .knowledge-split-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .container {
    padding-inline: 16px;
  }
  .primary-nav {
    display: none;
  }
  .mobile-menu-toggle {
    display: inline-flex;
  }
  .hero-home {
    min-height: 360px;
    background-position: 70% center;
  }
  .category-strip {
    grid-template-columns: repeat(5, minmax(92px, 1fr));
    overflow-x: auto;
  }
  .product-grid-4,
  .product-grid-3,
  .product-grid-2 {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  .usp-strip {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .catalog-layout,
  .brand-layout,
  .checkout-layout,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .cart-item {
    grid-template-columns: 80px 1fr;
  }
  .cart-item__right {
    grid-column: 1 / -1;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding-top: 8px;
    border-top: 1px dashed var(--color-border);
  }
  .cart-cta-grid,
  .form-row-2 {
    grid-template-columns: 1fr;
  }
  .zalo-card {
    flex-direction: column;
    align-items: flex-start;
  }
  .zalo-card .btn {
    width: 100%;
  }
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
  }
  .mobile-sticky-bar {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 38;
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: 10px 16px;
    gap: 12px;
    box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.08);
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}