/* ==========================================================================
   NỘI THẤT ĐỨC NGỌC - CATALOG ENGINE (B2B TENDER & PRODUCT SPEC SHEET)
   Tham khảo tiêu chuẩn: Nội Thất The One, Đồ Gỗ Cường Nga, Bemos
   ========================================================================== */

:root {
  --c-primary: #d4af37;
  --c-primary-dark: #b89327;
  --c-primary-light: #f7e7a9;
  --c-bg: #0f1115;
  --c-surface: #181b22;
  --c-surface-card: #20242e;
  --c-surface-hover: #292e3b;
  --c-border: rgba(212, 175, 55, 0.2);
  --c-border-subtle: rgba(255, 255, 255, 0.08);
  --c-text: #f0f2f5;
  --c-text-muted: #9ba3af;
  --c-text-dim: #6c7585;
  --c-accent: #25d366; /* Zalo/Chat green */
  --c-zalo: #0068ff;
  --c-danger: #ef4444;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.6);
  --shadow-gold: 0 4px 20px rgba(212, 175, 55, 0.25);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --font-body: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

/* ==================== 1. TOP NOTICE & HEADER ==================== */
.top-notice-bar {
  background: linear-gradient(90deg, #12141a 0%, #1e1b12 50%, #12141a 100%);
  border-bottom: 1px solid var(--c-border);
  font-size: 0.82rem;
  color: var(--c-primary-light);
  padding: 8px 16px;
  text-align: center;
  font-weight: 500;
  letter-spacing: 0.5px;
}
.top-notice-bar .highlight {
  color: #fff;
  font-weight: 700;
  text-transform: uppercase;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(18, 20, 26, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-border-subtle);
  padding: 12px 0;
  box-shadow: var(--shadow-sm);
}

.header-container {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}
.brand-logo {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-primary);
  object-fit: cover;
}
.brand-text h1 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  line-height: 1.2;
}
.brand-text h1 span {
  color: var(--c-primary);
}
.brand-text p {
  font-size: 0.72rem;
  color: var(--c-text-muted);
  letter-spacing: 0.3px;
}

/* Search bar center (The One & Bemos style) */
.header-search-wrap {
  flex: 1;
  max-width: 580px;
  position: relative;
}
.header-search-wrap .search-input {
  width: 100%;
  background: var(--c-surface-card);
  border: 1px solid var(--c-border-subtle);
  border-radius: var(--radius-full);
  padding: 10px 48px 10px 20px;
  font-size: 0.92rem;
  color: #fff;
  font-family: inherit;
  transition: var(--transition);
}
.header-search-wrap .search-input:focus {
  outline: none;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.2);
  background: var(--c-surface);
}
.header-search-wrap .search-icon {
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--c-primary);
  pointer-events: none;
  font-size: 1.1rem;
}

/* Header actions right */
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.btn-nav-home {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  color: var(--c-text);
  border: 1px solid var(--c-border-subtle);
  border-radius: var(--radius-full);
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  transition: var(--transition);
}
.btn-nav-home:hover {
  border-color: var(--c-primary);
  color: var(--c-primary);
  background: rgba(212, 175, 55, 0.08);
}

.btn-tray-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-dark) 100%);
  color: #0f1115;
  border: none;
  border-radius: var(--radius-full);
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: var(--shadow-gold);
  transition: var(--transition);
}
.btn-tray-toggle:hover {
  transform: translateY(-2px);
  filter: brightness(1.1);
}
.tray-badge-count {
  background: #0f1115;
  color: var(--c-primary);
  border-radius: var(--radius-full);
  padding: 2px 7px;
  font-size: 0.75rem;
  font-weight: 800;
}

/* ==================== 2. CLEAN HERO BANNER ==================== */
.clean-hero-banner {
  background: radial-gradient(circle at 50% 0%, #1e2430 0%, #101217 100%);
  border-bottom: 1px solid var(--c-border-subtle);
  padding: 30px 20px 22px;
  text-align: center;
}
.clean-hero-inner {
  max-width: 900px;
  margin: 0 auto;
}
.clean-hero-eyebrow {
  display: inline-block;
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--c-primary);
  margin-bottom: 8px;
}
.clean-hero-title {
  font-family: var(--font-serif);
  font-size: 2.1rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.25;
  margin-bottom: 10px;
}
.clean-hero-title span {
  color: var(--c-primary);
}
.clean-hero-desc {
  color: var(--c-text-muted);
  font-size: 0.92rem;
  line-height: 1.6;
}
.clean-hero-desc strong {
  color: #fff;
}

/* ==================== 3. CATEGORY TABS & FILTER BAR ==================== */
.filter-sticky-section {
  position: sticky;
  top: 70px;
  z-index: 90;
  background: rgba(15, 17, 21, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--c-border-subtle);
  padding: 14px 0 10px;
}
.filter-container {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Category Tab Pills */
.category-tab-row {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: thin;
  scrollbar-color: var(--c-primary) transparent;
}
.category-tab-row::-webkit-scrollbar {
  height: 4px;
}
.category-tab-row::-webkit-scrollbar-thumb {
  background: var(--c-border);
  border-radius: var(--radius-full);
}

.cat-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  background: var(--c-surface-card);
  color: var(--c-text-muted);
  border: 1px solid var(--c-border-subtle);
  border-radius: var(--radius-full);
  padding: 7px 15px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}
.cat-btn:hover {
  color: #fff;
  border-color: var(--c-primary);
  background: var(--c-surface-hover);
}
.cat-btn.active {
  background: var(--c-primary);
  color: #0f1115;
  border-color: var(--c-primary);
  font-weight: 700;
  box-shadow: var(--shadow-gold);
}
.cat-btn .count {
  font-size: 0.72rem;
  background: rgba(0, 0, 0, 0.25);
  padding: 1px 6px;
  border-radius: var(--radius-full);
}
.cat-btn.active .count {
  background: rgba(0, 0, 0, 0.4);
  color: #fff;
}

/* Secondary filter row (Style, Room, Sorting) */
.sub-filter-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed rgba(255, 255, 255, 0.07);
}

.sub-filter-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.filter-label {
  font-size: 0.78rem;
  color: var(--c-text-dim);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.5px;
}
.filter-select {
  background: var(--c-surface-card);
  color: var(--c-text);
  border: 1px solid var(--c-border-subtle);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  font-size: 0.82rem;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
}
.filter-select:focus {
  outline: none;
  border-color: var(--c-primary);
}

.result-count-text {
  font-size: 0.85rem;
  color: var(--c-text-muted);
}
.result-count-text strong {
  color: var(--c-primary);
}

/* ==================== 4. PRODUCT CATALOG GRID ==================== */
.catalog-content-section {
  max-width: 1320px;
  margin: 0 auto;
  padding: 30px 20px 80px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

/* Product Card (Clean Image-First Luxury Showcase) */
.product-card {
  background: var(--c-surface-card);
  border: 1px solid var(--c-border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  cursor: pointer;
  position: relative;
}
.product-card:hover {
  transform: translateY(-5px);
  border-color: var(--c-primary);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.55), 0 0 16px rgba(212, 175, 55, 0.15);
}

.card-img-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 4/3;
  overflow: hidden;
  background: #14171f;
}
.card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}
.product-card:hover .card-img {
  transform: scale(1.06);
}

/* Minimal SKU Badge on Image */
.sku-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(15, 17, 21, 0.88);
  border: 1px solid var(--c-border);
  backdrop-filter: blur(6px);
  color: var(--c-primary);
  font-weight: 800;
  font-size: 0.76rem;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.5px;
  z-index: 2;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

/* Float Discount Badge on Card Image (Top Right) */
.discount-badge-float {
  position: absolute;
  top: 10px;
  right: 10px;
  background: linear-gradient(135deg, #e53935 0%, #d32f2f 100%);
  color: #ffffff;
  font-weight: 800;
  font-size: 0.72rem;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.3px;
  z-index: 2;
  box-shadow: 0 2px 8px rgba(229, 57, 53, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.25);
}

/* Hover overlay */
.card-hover-mask {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.1) 0%, rgba(0, 0, 0, 0.75) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.25s ease;
  z-index: 1;
}
.product-card:hover .card-hover-mask {
  opacity: 1;
}
.view-detail-hint {
  background: rgba(212, 175, 55, 0.95);
  color: #0f1115;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 7px 16px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);
  transform: translateY(10px);
  transition: transform 0.25s ease;
}
.product-card:hover .view-detail-hint {
  transform: translateY(0);
}

/* Clean Minimal Caption */
.card-clean-caption {
  padding: 12px 14px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.card-clean-title {
  font-size: 0.94rem;
  font-weight: 600;
  color: #fff;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: var(--transition);
}
.product-card:hover .card-clean-title {
  color: var(--c-primary);
}

/* Clean 1-Line Price & Discount Row */
.card-price-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px;
  margin-top: 4px;
  padding-top: 5px;
  border-top: 1px dashed rgba(255, 255, 255, 0.08);
}
.price-val-wrap {
  display: flex;
  align-items: baseline;
  gap: 6px;
  overflow: hidden;
}
.price-current {
  color: #e5c05d;
  font-size: 0.96rem;
  font-weight: 800;
  white-space: nowrap;
  letter-spacing: 0.2px;
}
.price-old {
  color: var(--c-text-dim);
  font-size: 0.76rem;
  text-decoration: line-through;
  white-space: nowrap;
}
.discount-tag {
  background: rgba(229, 57, 53, 0.15);
  color: #ff6b6b;
  border: 1px solid rgba(229, 57, 53, 0.35);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 4px;
  white-space: nowrap;
  flex-shrink: 0;
}

.card-clean-sub {
  font-size: 0.74rem;
  color: var(--c-text-dim);
  letter-spacing: 0.3px;
  margin-top: 2px;
}

/* ==================== 5. SPEC SHEET MODAL (THE ONE / BEMOS DETAIL) ==================== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}
.modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.spec-modal-card,
.modal-box {
  background: var(--c-surface-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  max-width: 960px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  position: relative;
  transform: translateY(20px);
  transition: transform 0.25s ease;
}
.modal-backdrop.open .spec-modal-card,
.modal-backdrop.open .modal-box {
  transform: translateY(0);
}

.modal-close-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  transition: var(--transition);
}
.modal-close-btn:hover {
  background: var(--c-danger);
  border-color: var(--c-danger);
}

.modal-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  padding: 28px;
}

.modal-img-col {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.modal-img-large {
  width: 100%;
  border-radius: var(--radius-md);
  border: 1px solid var(--c-border-subtle);
  object-fit: cover;
  max-height: 420px;
}

.modal-share-link-box {
  background: var(--c-surface);
  border: 1px dashed var(--c-border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 0.8rem;
}
.modal-share-link-box code {
  color: var(--c-primary-light);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.modal-share-link-box button {
  background: var(--c-primary);
  color: #0f1115;
  border: none;
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.75rem;
  cursor: pointer;
  white-space: nowrap;
}

.modal-info-col h2 {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  color: #fff;
  line-height: 1.35;
  margin-top: 8px;
  margin-bottom: 14px;
}

/* Modal Price & Factory Discount Card */
.modal-price-card {
  background: linear-gradient(135deg, rgba(32, 36, 46, 0.95) 0%, rgba(20, 23, 30, 0.98) 100%);
  border: 1px solid rgba(212, 175, 55, 0.35);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  margin-bottom: 20px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
}
.modal-price-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.modal-price-label {
  display: block;
  font-size: 0.76rem;
  color: var(--c-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 2px;
}
.modal-price-figures {
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.modal-price-current {
  font-size: 1.55rem;
  font-weight: 800;
  color: #f7e7a9;
  letter-spacing: 0.3px;
  line-height: 1.2;
}
.modal-price-old {
  font-size: 0.95rem;
  color: var(--c-text-dim);
  text-decoration: line-through;
}
.modal-discount-tag {
  background: linear-gradient(135deg, #e53935 0%, #b71c1c 100%);
  color: #fff;
  font-weight: 800;
  font-size: 0.78rem;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  box-shadow: 0 2px 10px rgba(229, 57, 53, 0.4);
}
.modal-price-subtext {
  margin-top: 8px;
  font-size: 0.78rem;
  color: #a8d5ba;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Detail Table (Spec sheet like The One / Bemos) */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 20px;
  font-size: 0.86rem;
}
.spec-table th, .spec-table td {
  padding: 10px 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  text-align: left;
}
.spec-table th {
  width: 35%;
  color: var(--c-text-muted);
  font-weight: 600;
  background: rgba(0, 0, 0, 0.15);
}
.spec-table td {
  color: #e2e8f0;
}
.spec-table tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

.modal-actions-row {
  display: flex;
  gap: 12px;
  margin-top: 16px;
}
.modal-btn-zalo {
  flex: 1;
  background: linear-gradient(135deg, #0068ff 0%, #0051c9 100%);
  color: #fff;
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  text-decoration: none;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.9rem;
  box-shadow: 0 4px 16px rgba(0, 104, 255, 0.35);
  transition: var(--transition);
}
.modal-btn-zalo:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
}

.modal-btn-tray {
  background: var(--c-surface);
  color: var(--c-primary);
  border: 1px solid var(--c-border);
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  transition: var(--transition);
}
.modal-btn-tray:hover {
  background: var(--c-primary);
  color: #0f1115;
}

/* ==================== 6. FLOATING BIDDING TRAY DRAWER ==================== */
.tray-drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 300;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}
.tray-drawer-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.tray-drawer {
  position: fixed;
  top: 0;
  right: -480px;
  width: 480px;
  max-width: 100vw;
  height: 100vh;
  background: var(--c-surface-card);
  border-left: 1px solid var(--c-border);
  box-shadow: var(--shadow-lg);
  z-index: 310;
  display: flex;
  flex-direction: column;
  transition: right 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}
.tray-drawer.open {
  right: 0;
}

.drawer-header {
  padding: 20px;
  border-bottom: 1px solid var(--c-border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.drawer-header h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 8px;
}
.drawer-header h3 span {
  color: var(--c-primary);
}

.drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tray-empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--c-text-muted);
}
.tray-empty-icon {
  font-size: 3rem;
  margin-bottom: 12px;
  opacity: 0.6;
}

.tray-item {
  background: var(--c-surface);
  border: 1px solid var(--c-border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.tray-item-thumb {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
}
.tray-item-info {
  flex: 1;
  min-width: 0;
}
.tray-item-sku {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--c-primary);
}
.tray-item-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.tray-item-specs {
  font-size: 0.75rem;
  color: var(--c-text-dim);
}
.tray-item-price {
  font-size: 0.78rem;
  font-weight: 700;
  color: #e5c05d;
  margin-top: 2px;
}
.tray-item-del {
  background: transparent;
  border: none;
  color: var(--c-text-dim);
  cursor: pointer;
  padding: 6px;
  font-size: 1.1rem;
  transition: var(--transition);
}
.tray-item-del:hover {
  color: var(--c-danger);
}

.drawer-footer {
  padding: 20px;
  border-top: 1px solid var(--c-border-subtle);
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: rgba(18, 20, 26, 0.95);
}
.btn-export-excel {
  background: #107c41; /* Excel green */
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 12px;
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: var(--transition);
}
.btn-export-excel:hover {
  background: #0b5a2f;
}

.btn-send-tray-zalo {
  background: linear-gradient(135deg, #0068ff 0%, #0051c9 100%);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 12px;
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  transition: var(--transition);
}
.btn-send-tray-zalo:hover {
  filter: brightness(1.1);
}

.btn-clear-tray {
  background: transparent;
  color: var(--c-text-dim);
  border: none;
  font-size: 0.78rem;
  cursor: pointer;
  text-align: center;
  padding: 4px;
}
.btn-clear-tray:hover {
  color: var(--c-danger);
}

/* ==================== 7. TOAST NOTIFICATION ==================== */
.toast-notice {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: rgba(20, 24, 33, 0.95);
  border: 1px solid var(--c-primary);
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  font-size: 0.88rem;
  font-weight: 600;
  z-index: 500;
  display: flex;
  align-items: center;
  gap: 10px;
  pointer-events: none;
  opacity: 0;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
}
.toast-notice.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ==================== 8. FOOTER ==================== */
.catalog-footer {
  background: #090a0d;
  border-top: 1px solid var(--c-border-subtle);
  padding: 40px 20px 20px;
  color: var(--c-text-muted);
  font-size: 0.85rem;
}
.catalog-footer-inner {
  max-width: 1320px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 30px;
}
.catalog-footer h4 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 12px;
  font-weight: 700;
}
.catalog-footer p {
  line-height: 1.6;
  margin-bottom: 8px;
}
.catalog-footer a {
  color: var(--c-primary);
  text-decoration: none;
}
.footer-bottom-copy {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 16px;
  text-align: center;
  font-size: 0.78rem;
  color: var(--c-text-dim);
}

/* ==================== RESPONSIVE BREAKPOINTS ==================== */
@media (max-width: 1100px) {
  .product-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 820px) {
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }
  .modal-grid {
    grid-template-columns: 1fr;
  }
  .catalog-footer-inner {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .header-search-wrap {
    order: 3;
    max-width: 100%;
    width: 100%;
    margin-top: 10px;
  }
  .header-container {
    flex-wrap: wrap;
  }
  .tray-drawer {
    width: 100vw;
  }
}

@media (max-width: 480px) {
  .product-grid {
    grid-template-columns: 1fr;
  }
  .b2b-title {
    font-size: 1.6rem;
  }
}