/* ============================================
   SignHall - Online Signage Exhibition Hall
   Global Stylesheet
   ============================================ */

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

:root {
  /* Brand Colors */
  --brand-primary: #1a3a5c;
  --brand-primary-light: #2c5282;
  --brand-accent: #f0a500;
  --brand-dark: #0f1c2e;
  --brand-bg: #f8fafc;
  --brand-white: #ffffff;

  /* Category Colors */
  --cat-a: #2563eb;
  --cat-a-bg: #dbeafe;
  --cat-a-border: #3b82f6;
  --cat-b: #059669;
  --cat-b-bg: #d1fae5;
  --cat-b-border: #10b981;
  --cat-c: #d97706;
  --cat-c-bg: #fef3c7;
  --cat-c-border: #f59e0b;

  /* Neutral */
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;

  /* Effects */
  --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);

  /* Layout */
  --radius: 12px;
  --radius-sm: 8px;
  --max-width: 1200px;
  --header-height: 64px;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--brand-bg);
  color: var(--gray-800);
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--brand-primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--cat-a); }

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

/* ---------- Header / Navigation ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  height: var(--header-height);
  background: var(--brand-primary);
  box-shadow: var(--shadow-md);
}
.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.5rem; font-weight: 800;
  color: var(--brand-white);
  letter-spacing: -0.5px;
}
.nav-logo .logo-icon {
  width: 36px; height: 36px;
  background: var(--brand-accent);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; color: var(--brand-primary);
}
.nav-menu { display: flex; align-items: center; gap: 28px; list-style: none; }
.nav-menu a {
  color: rgba(255,255,255,0.85);
  font-size: 0.95rem; font-weight: 500;
  padding: 8px 0;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
}
.nav-menu a:hover, .nav-menu a.active {
  color: var(--brand-white);
  border-bottom-color: var(--brand-accent);
}
.nav-search-mini {
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 20px;
  padding: 6px 16px;
  color: var(--brand-white);
  font-size: 0.85rem;
  width: 200px;
  outline: none;
  transition: all 0.2s;
}
.nav-search-mini::placeholder { color: rgba(255,255,255,0.6); }
.nav-search-mini:focus { background: rgba(255,255,255,0.25); width: 260px; }

/* ---------- Hero Section (Homepage) ---------- */
.hero {
  background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-dark) 100%);
  color: var(--brand-white);
  padding: 80px 24px 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(circle at 30% 50%, rgba(240,165,0,0.08), transparent 50%),
              radial-gradient(circle at 70% 80%, rgba(37,99,235,0.1), transparent 50%);
}
.hero-content { position: relative; max-width: var(--max-width); margin: 0 auto; }
.hero h1 { font-size: 2.8rem; font-weight: 800; margin-bottom: 16px; letter-spacing: -1px; }
.hero p { font-size: 1.15rem; color: rgba(255,255,255,0.8); max-width: 700px; margin: 0 auto 32px; }
.hero-search-bar {
  display: flex; max-width: 640px; margin: 0 auto;
  background: var(--brand-white);
  border-radius: 28px;
  padding: 6px;
  box-shadow: var(--shadow-xl);
}
.hero-search-bar input {
  flex: 1; border: none; outline: none;
  padding: 14px 24px; font-size: 1rem;
  background: transparent; color: var(--gray-800);
  border-radius: 24px;
}
.hero-search-bar button {
  background: var(--brand-accent); color: var(--brand-primary);
  border: none; border-radius: 24px;
  padding: 14px 32px; font-size: 1rem; font-weight: 600;
  cursor: pointer; transition: all 0.2s;
}
.hero-search-bar button:hover { background: #ffb730; transform: scale(1.02); }
.hero-quick-tags { margin-top: 24px; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero-quick-tags span { color: rgba(255,255,255,0.6); font-size: 0.85rem; }
.hero-quick-tags a {
  color: rgba(255,255,255,0.9);
  font-size: 0.85rem;
  background: rgba(255,255,255,0.1);
  padding: 4px 12px; border-radius: 14px;
  transition: all 0.2s;
}
.hero-quick-tags a:hover { background: rgba(255,255,255,0.2); }

/* ---------- Section Layout ---------- */
.section { max-width: var(--max-width); margin: 0 auto; padding: 56px 24px; }
.section-title {
  font-size: 1.8rem; font-weight: 700; color: var(--gray-900);
  text-align: center; margin-bottom: 8px;
}
.section-subtitle {
  text-align: center; color: var(--gray-500); font-size: 1rem; margin-bottom: 40px;
}

/* ---------- Pavilion Cards (Homepage) ---------- */
.pavilion-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}
.pavilion-card {
  background: var(--brand-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all 0.3s;
  border-top: 4px solid var(--gray-300);
  cursor: pointer;
}
.pavilion-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-xl); }
.pavilion-card.cat-a { border-top-color: var(--cat-a); }
.pavilion-card.cat-b { border-top-color: var(--cat-b); }
.pavilion-card.cat-c { border-top-color: var(--cat-c); }
.pavilion-card-header {
  padding: 32px 28px 20px;
  position: relative;
}
.pavilion-badge {
  display: inline-block;
  font-size: 0.75rem; font-weight: 700;
  padding: 4px 10px; border-radius: 4px;
  margin-bottom: 12px;
  text-transform: uppercase; letter-spacing: 0.5px;
}
.cat-a .pavilion-badge { background: var(--cat-a-bg); color: var(--cat-a); }
.cat-b .pavilion-badge { background: var(--cat-b-bg); color: var(--cat-b); }
.cat-c .pavilion-badge { background: var(--cat-c-bg); color: var(--cat-c); }
.pavilion-card-header h3 { font-size: 1.3rem; font-weight: 700; color: var(--gray-900); margin-bottom: 8px; }
.pavilion-card-header p { color: var(--gray-500); font-size: 0.9rem; }
.pavilion-card-body { padding: 0 28px 28px; }
.pavilion-card-body ul { list-style: none; margin-bottom: 20px; }
.pavilion-card-body li {
  padding: 8px 0; font-size: 0.9rem; color: var(--gray-600);
  border-bottom: 1px solid var(--gray-100);
  display: flex; align-items: center; gap: 8px;
}
.pavilion-card-body li::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: currentColor; opacity: 0.4;
}
.pavilion-card-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.9rem; font-weight: 600;
  padding: 8px 0;
}
.cat-a .pavilion-card-link { color: var(--cat-a); }
.cat-b .pavilion-card-link { color: var(--cat-b); }
.cat-c .pavilion-card-link { color: var(--cat-c); }

/* ---------- Exhibit Cards (Listing & Detail) ---------- */
.exhibit-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.exhibit-card {
  background: var(--brand-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s;
  border: 1px solid var(--gray-200);
}
.exhibit-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: var(--gray-300); }
.exhibit-card-thumb {
  width: 100%; height: 180px;
  background: linear-gradient(135deg, var(--gray-100), var(--gray-200));
  display: flex; align-items: center; justify-content: center;
  position: relative;
  overflow: hidden;
}
.exhibit-card-thumb .thumb-icon { font-size: 3rem; opacity: 0.3; }
.exhibit-card-thumb .export-badge {
  position: absolute; top: 10px; right: 10px;
  background: var(--cat-b); color: white;
  font-size: 0.7rem; font-weight: 600;
  padding: 3px 8px; border-radius: 4px;
}
.exhibit-card-body { padding: 16px 20px; }
.exhibit-card-meta { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.cat-tag {
  font-size: 0.7rem; font-weight: 700;
  padding: 3px 8px; border-radius: 4px;
  text-transform: uppercase;
}
.cat-tag.a { background: var(--cat-a-bg); color: var(--cat-a); }
.cat-tag.b { background: var(--cat-b-bg); color: var(--cat-b); }
.cat-tag.c { background: var(--cat-c-bg); color: var(--cat-c); }
.exhibit-card-body h4 { font-size: 1rem; font-weight: 600; color: var(--gray-900); margin-bottom: 8px; line-height: 1.4; }
.exhibit-card-body p { font-size: 0.85rem; color: var(--gray-500); line-height: 1.5;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.exhibit-card-footer { padding: 0 20px 16px; display: flex; align-items: center; justify-content: space-between; }
.exhibit-card-footer .sub-cat { font-size: 0.8rem; color: var(--gray-400); }

/* ---------- Filter Bar ---------- */
.filter-bar {
  background: var(--brand-white);
  border-radius: var(--radius);
  padding: 20px 24px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: flex-end;
}
.filter-group { display: flex; flex-direction: column; gap: 6px; }
.filter-group label { font-size: 0.75rem; font-weight: 600; color: var(--gray-500); text-transform: uppercase; letter-spacing: 0.5px; }
.filter-group select, .filter-group input {
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 0.9rem;
  color: var(--gray-700);
  background: var(--brand-white);
  outline: none;
  transition: border-color 0.2s;
  min-width: 140px;
}
.filter-group select:focus, .filter-group input:focus { border-color: var(--cat-a); }
.filter-actions { display: flex; gap: 8px; margin-left: auto; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 20px; font-size: 0.9rem; font-weight: 600;
  border: none; border-radius: var(--radius-sm);
  cursor: pointer; transition: all 0.2s;
}
.btn-primary { background: var(--cat-a); color: white; }
.btn-primary:hover { background: #1d4ed8; }
.btn-secondary { background: var(--gray-100); color: var(--gray-700); }
.btn-secondary:hover { background: var(--gray-200); }
.btn-danger { background: #ef4444; color: white; }
.btn-danger:hover { background: #dc2626; }
.btn-success { background: var(--cat-b); color: white; }
.btn-success:hover { background: #047857; }
.btn-sm { padding: 6px 14px; font-size: 0.8rem; }
.btn-lg { padding: 14px 32px; font-size: 1rem; }
.btn-outline { background: transparent; border: 1px solid var(--gray-300); color: var(--gray-600); }
.btn-outline:hover { border-color: var(--cat-a); color: var(--cat-a); background: var(--cat-a-bg); }

/* ---------- Detail Page ---------- */
.detail-container { max-width: var(--max-width); margin: 0 auto; padding: 40px 24px; }
.breadcrumb { display: flex; align-items: center; gap: 8px; margin-bottom: 24px; font-size: 0.85rem; color: var(--gray-400); }
.breadcrumb a { color: var(--gray-500); }
.breadcrumb span { color: var(--gray-300); }
.detail-layout { display: grid; grid-template-columns: 1fr 380px; gap: 32px; }
.detail-main { background: var(--brand-white); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow-sm); }
.detail-thumb {
  width: 100%; height: 360px;
  background: linear-gradient(135deg, var(--gray-100), var(--gray-200));
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 24px;
}
.detail-thumb .thumb-icon { font-size: 6rem; opacity: 0.2; }
.detail-header { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 16px; }
.detail-header h1 { font-size: 1.6rem; font-weight: 700; color: var(--gray-900); }
.detail-header .detail-id { font-size: 0.85rem; color: var(--gray-400); margin-top: 4px; }
.detail-desc { font-size: 0.95rem; color: var(--gray-600); margin-bottom: 32px; line-height: 1.7; }
.detail-section { margin-bottom: 28px; }
.detail-section h3 { font-size: 1rem; font-weight: 600; color: var(--gray-900); margin-bottom: 12px; padding-bottom: 8px; border-bottom: 2px solid var(--gray-100); }
.detail-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.detail-tag {
  font-size: 0.8rem; padding: 4px 12px;
  background: var(--gray-100); color: var(--gray-600);
  border-radius: 14px;
}
.detail-list { list-style: none; }
.detail-list li { padding: 6px 0; font-size: 0.9rem; color: var(--gray-600); display: flex; align-items: center; gap: 8px; }
.detail-list li::before { content: '\2022'; color: var(--cat-a); font-weight: bold; }
.detail-advantage {
  background: var(--cat-a-bg); padding: 16px 20px;
  border-radius: var(--radius-sm); border-left: 4px solid var(--cat-a);
  font-size: 0.9rem; color: var(--gray-700); line-height: 1.6;
}
.detail-sidebar { display: flex; flex-direction: column; gap: 24px; }
.sidebar-card {
  background: var(--brand-white); border-radius: var(--radius);
  padding: 20px; box-shadow: var(--shadow-sm);
}
.sidebar-card h3 { font-size: 0.9rem; font-weight: 600; color: var(--gray-900); margin-bottom: 16px; text-transform: uppercase; letter-spacing: 0.5px; }
.related-item {
  display: flex; align-items: center; gap: 12px;
  padding: 12px; border-radius: var(--radius-sm);
  transition: all 0.2s; cursor: pointer;
}
.related-item:hover { background: var(--gray-50); }
.related-item .related-icon {
  width: 40px; height: 40px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; flex-shrink: 0;
}
.related-icon.cat-a { background: var(--cat-a-bg); color: var(--cat-a); }
.related-icon.cat-b { background: var(--cat-b-bg); color: var(--cat-b); }
.related-icon.cat-c { background: var(--cat-c-bg); color: var(--cat-c); }
.related-item .related-info { flex: 1; min-width: 0; }
.related-item .related-info h4 { font-size: 0.85rem; font-weight: 600; color: var(--gray-800); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.related-item .related-info p { font-size: 0.75rem; color: var(--gray-400); }

/* ---------- AI Search Page ---------- */
.ai-search-container { max-width: 800px; margin: 0 auto; padding: 48px 24px; }
.ai-search-box {
  background: var(--brand-white); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow-md); margin-bottom: 24px;
}
.ai-search-box h2 { font-size: 1.4rem; font-weight: 700; margin-bottom: 8px; color: var(--gray-900); }
.ai-search-box p { color: var(--gray-500); font-size: 0.9rem; margin-bottom: 20px; }
.ai-input-group { display: flex; gap: 12px; }
.ai-input-group input {
  flex: 1; border: 2px solid var(--gray-200); border-radius: var(--radius-sm);
  padding: 14px 18px; font-size: 1rem; outline: none; transition: border-color 0.2s;
}
.ai-input-group input:focus { border-color: var(--cat-a); }
.ai-suggestions { margin-top: 20px; }
.ai-suggestions p { font-size: 0.8rem; color: var(--gray-400); margin-bottom: 10px; }
.ai-suggestion-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.ai-chip {
  font-size: 0.8rem; padding: 6px 14px;
  background: var(--gray-100); color: var(--gray-600);
  border-radius: 16px; cursor: pointer; transition: all 0.2s;
}
.ai-chip:hover { background: var(--cat-a-bg); color: var(--cat-a); }
.ai-result { background: var(--brand-white); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow-sm); margin-bottom: 16px; }
.ai-result-header { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.ai-result-header h3 { font-size: 1rem; font-weight: 600; }
.ai-answer { font-size: 0.9rem; color: var(--gray-600); line-height: 1.7; margin-bottom: 16px; }
.ai-matched-exhibits { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }

/* ---------- Admin Panel ---------- */
.admin-container { max-width: var(--max-width); margin: 0 auto; padding: 32px 24px; }
.admin-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.admin-header h1 { font-size: 1.5rem; font-weight: 700; color: var(--gray-900); }
.admin-toolbar { display: flex; gap: 12px; margin-bottom: 20px; flex-wrap: wrap; align-items: center; }
.admin-stats { display: flex; gap: 16px; margin-bottom: 24px; }
.stat-card {
  flex: 1; background: var(--brand-white); border-radius: var(--radius);
  padding: 16px 20px; box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--gray-300);
}
.stat-card.cat-a { border-left-color: var(--cat-a); }
.stat-card.cat-b { border-left-color: var(--cat-b); }
.stat-card.cat-c { border-left-color: var(--cat-c); }
.stat-card .stat-label { font-size: 0.75rem; color: var(--gray-400); text-transform: uppercase; }
.stat-card .stat-value { font-size: 1.8rem; font-weight: 700; color: var(--gray-900); }
.admin-table { width: 100%; background: var(--brand-white); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); }
.admin-table table { width: 100%; border-collapse: collapse; }
.admin-table th { background: var(--gray-50); padding: 12px 16px; text-align: left; font-size: 0.75rem; text-transform: uppercase; color: var(--gray-500); font-weight: 600; letter-spacing: 0.5px; border-bottom: 1px solid var(--gray-200); }
.admin-table td { padding: 12px 16px; font-size: 0.85rem; color: var(--gray-700); border-bottom: 1px solid var(--gray-100); }
.admin-table tr:hover { background: var(--gray-50); }
.admin-table .action-btns { display: flex; gap: 6px; }
.admin-pagination { display: flex; justify-content: center; gap: 8px; margin-top: 20px; }

/* ---------- Modal ---------- */
.modal-overlay {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000; padding: 24px;
}
.modal {
  background: var(--brand-white); border-radius: var(--radius);
  max-width: 700px; width: 100%; max-height: 90vh; overflow-y: auto;
  box-shadow: var(--shadow-xl);
}
.modal-header { display: flex; justify-content: space-between; align-items: center; padding: 20px 24px; border-bottom: 1px solid var(--gray-200); }
.modal-header h2 { font-size: 1.2rem; font-weight: 700; }
.modal-close { background: none; border: none; font-size: 1.5rem; color: var(--gray-400); cursor: pointer; }
.modal-body { padding: 24px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 0.85rem; font-weight: 600; color: var(--gray-700); margin-bottom: 6px; }
.form-group label .req { color: #ef4444; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; border: 1px solid var(--gray-300); border-radius: var(--radius-sm);
  padding: 10px 14px; font-size: 0.9rem; outline: none; transition: border-color 0.2s;
  font-family: inherit;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--cat-a); }
.form-group .hint { font-size: 0.75rem; color: var(--gray-400); margin-top: 4px; }
.form-group .error { font-size: 0.75rem; color: #ef4444; margin-top: 4px; }
.form-error-box {
  background: #fef2f2; border: 1px solid #fecaca; border-radius: var(--radius-sm);
  padding: 12px 16px; margin-bottom: 16px; font-size: 0.85rem; color: #dc2626;
}
.modal-footer { display: flex; justify-content: flex-end; gap: 12px; padding: 16px 24px; border-top: 1px solid var(--gray-200); }

/* ---------- Toast Notification ---------- */
.toast {
  position: fixed; bottom: 24px; right: 24px;
  background: var(--gray-900); color: white;
  padding: 12px 20px; border-radius: var(--radius-sm);
  font-size: 0.9rem; z-index: 2000;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.3s ease;
}
.toast.success { background: var(--cat-b); }
.toast.error { background: #ef4444; }
@keyframes slideUp { from { transform: translateY(100px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--brand-dark); color: rgba(255,255,255,0.6);
  padding: 40px 24px 24px; margin-top: 60px;
}
.footer-container { max-width: var(--max-width); margin: 0 auto; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; margin-bottom: 24px; }
.footer-brand h3 { color: white; font-size: 1.2rem; margin-bottom: 8px; }
.footer-brand p { font-size: 0.85rem; line-height: 1.6; }
.footer-col h4 { color: rgba(255,255,255,0.9); font-size: 0.9rem; margin-bottom: 12px; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 6px; }
.footer-col a { color: rgba(255,255,255,0.6); font-size: 0.85rem; }
.footer-col a:hover { color: white; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 16px; text-align: center; font-size: 0.8rem; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .nav-menu { display: none; }
  .nav-search-mini { display: none; }
  .detail-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 1rem; }
  .section { padding: 40px 16px; }
  .admin-stats { flex-direction: column; }
}
@media (max-width: 600px) {
  .footer-grid { grid-template-columns: 1fr; }
  .hero-search-bar { flex-direction: column; border-radius: var(--radius); }
  .hero-search-bar input { border-radius: var(--radius-sm); }
  .hero-search-bar button { border-radius: var(--radius-sm); }
  .filter-bar { flex-direction: column; }
  .filter-actions { margin-left: 0; }
  .exhibit-grid { grid-template-columns: 1fr; }
}

/* ---------- Utility Classes ---------- */
.text-center { text-align: center; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.hidden { display: none !important; }
.flex { display: flex; }
.items-center { align-items: center; }
.gap-2 { gap: 8px; }
.gap-4 { gap: 16px; }
.w-full { width: 100%; }

/* ============================================
   IMPROVEMENTS - v2 Enhancements
   ============================================ */

/* ---------- Navigation Improvements ---------- */
.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav-lang-toggle {
  font-size: 0.85rem !important;
  font-weight: 600 !important;
  padding: 4px 10px !important;
  background: rgba(255,255,255,0.15) !important;
  border-radius: 16px !important;
  border: 1px solid rgba(255,255,255,0.2) !important;
  color: rgba(255,255,255,0.9) !important;
  transition: all 0.2s;
}
.nav-lang-toggle:hover {
  background: rgba(255,255,255,0.25) !important;
  color: white !important;
  border-bottom-color: rgba(255,255,255,0.2) !important;
}

/* Mobile hamburger menu */
.nav-mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 22px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
}
.nav-mobile-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: white;
  border-radius: 2px;
  transition: all 0.3s;
}
.nav-mobile-toggle.active span:nth-child(1) {
  transform: translateY(10px) rotate(45deg);
}
.nav-mobile-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-mobile-toggle.active span:nth-child(3) {
  transform: translateY(-10px) rotate(-45deg);
}

@media (max-width: 900px) {
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--brand-primary);
    flex-direction: column;
    padding: 16px 0;
    gap: 0 !important;
    box-shadow: var(--shadow-md);
    transform: translateY(-120%);
    transition: transform 0.3s ease;
    z-index: 99;
  }
  .nav-menu.mobile-open {
    transform: translateY(0);
  }
  .nav-menu li {
    width: 100%;
  }
  .nav-menu a {
    display: block;
    padding: 14px 24px !important;
    border-bottom: 1px solid rgba(255,255,255,0.1);
  }
  .nav-menu a.active {
    border-bottom-color: var(--brand-accent);
    background: rgba(255,255,255,0.05);
  }
  .nav-lang-toggle {
    margin: 12px 24px !important;
    display: inline-block !important;
  }
  .nav-mobile-toggle {
    display: flex;
  }
  .nav-search-mini {
    width: 150px !important;
  }
}

@media (max-width: 600px) {
  .nav-search-mini {
    display: none !important;
  }
}

/* ---------- Exhibit Card SVG Thumbnails ---------- */
.exhibit-card-thumb svg {
  width: 100%;
  height: 100%;
  display: block;
}
.exhibit-card-thumb {
  overflow: hidden;
  position: relative;
  background: var(--gray-50) !important;
}
.exhibit-card-thumb .exhibit-svg {
  transition: transform 0.4s ease;
}
.exhibit-card:hover .exhibit-card-thumb .exhibit-svg {
  transform: scale(1.05);
}
.exhibit-card-thumb .thumb-icon { display: none; }

/* Detail page thumb */
.detail-thumb .exhibit-svg {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.detail-thumb .exhibit-svg svg {
  max-width: 400px;
  max-height: 300px;
}
.detail-thumb .thumb-icon { display: none; }

/* ---------- Homepage Hero Improvements ---------- */
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 40px;
  flex-wrap: wrap;
}
.hero-stat {
  text-align: center;
}
.hero-stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--brand-accent);
  line-height: 1;
}
.hero-stat-label {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
  margin-top: 4px;
}

/* ---------- Pavilion Card Improvements ---------- */
.pavilion-card-header {
  position: relative;
  overflow: hidden;
}
.pavilion-icon-row {
  display: flex;
  gap: 8px;
  margin-top: 16px;
  opacity: 0.6;
}
.pavilion-icon-row svg {
  width: 48px;
  height: 36px;
}
.pavilion-stats-row {
  display: flex;
  gap: 16px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--gray-100);
}
.pavilion-stat-mini {
  flex: 1;
  text-align: center;
}
.pavilion-stat-mini .num {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--gray-800);
}
.pavilion-stat-mini .label {
  font-size: 0.7rem;
  color: var(--gray-400);
  text-transform: uppercase;
}

/* ---------- Category Page Sort/View Toggle ---------- */
.filter-toolbar-right {
  display: flex;
  gap: 8px;
  align-items: center;
}
.view-toggle {
  display: flex;
  background: var(--gray-100);
  border-radius: var(--radius-sm);
  padding: 3px;
}
.view-toggle button {
  border: none;
  background: transparent;
  padding: 6px 12px;
  font-size: 0.8rem;
  color: var(--gray-500);
  cursor: pointer;
  border-radius: 6px;
  transition: all 0.2s;
}
.view-toggle button.active {
  background: white;
  color: var(--gray-800);
  box-shadow: var(--shadow-sm);
}

/* List view for exhibits */
.exhibit-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.exhibit-list-item {
  display: flex;
  gap: 20px;
  background: white;
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  border: 1px solid var(--gray-200);
  transition: all 0.2s;
  cursor: pointer;
}
.exhibit-list-item:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--gray-300);
}
.exhibit-list-item .list-thumb {
  width: 120px;
  height: 80px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--gray-50);
}
.exhibit-list-item .list-thumb svg {
  width: 100%;
  height: 100%;
}
.exhibit-list-item .list-content {
  flex: 1;
  min-width: 0;
}
.exhibit-list-item .list-content h4 {
  font-size: 1rem;
  margin-bottom: 4px;
}
.exhibit-list-item .list-content p {
  font-size: 0.85rem;
  color: var(--gray-500);
  line-height: 1.5;
}
.exhibit-list-item .list-meta {
  display: flex;
  gap: 12px;
  margin-top: 8px;
  font-size: 0.75rem;
  color: var(--gray-400);
}

/* ---------- Detail Page Spec Table ---------- */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.spec-table th, .spec-table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--gray-100);
}
.spec-table th {
  width: 140px;
  background: var(--gray-50);
  color: var(--gray-500);
  font-weight: 500;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}
.spec-table td {
  color: var(--gray-700);
}

/* ---------- Loading Skeleton ---------- */
.skeleton {
  background: linear-gradient(90deg, var(--gray-100) 25%, var(--gray-200) 50%, var(--gray-100) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: 4px;
}
@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ---------- Feature Highlights on Homepage ---------- */
.features-section {
  background: var(--brand-white);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  margin-top: 32px;
}
.feature-item {
  text-align: center;
  padding: 24px 16px;
  border-radius: var(--radius-sm);
  transition: all 0.3s;
}
.feature-item:hover {
  background: var(--gray-50);
  transform: translateY(-4px);
}
.feature-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
}
.feature-item h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 8px;
}
.feature-item p {
  font-size: 0.85rem;
  color: var(--gray-500);
  line-height: 1.6;
}

/* ---------- Smooth Scroll Reveal Animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Improved Back to Top ---------- */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--brand-primary);
  color: white;
  border: none;
  cursor: pointer;
  font-size: 1.2rem;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
  z-index: 90;
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}
.back-to-top:hover {
  background: var(--brand-primary-light);
  transform: translateY(-2px);
}

/* ---------- Hover Effect for Cards ---------- */
.exhibit-card {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.exhibit-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

/* ---------- Data Stats Badges ---------- */
.data-badge-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 8px;
}
.data-badge {
  font-size: 0.7rem;
  padding: 2px 8px;
  background: var(--gray-100);
  color: var(--gray-600);
  border-radius: 10px;
  font-weight: 500;
}

/* ============================================
   EXHIBITION HALL THEME - v3
   ============================================ */

/* ---------- Hero - Exhibition Hall Entrance ---------- */
.hero-exhibition {
  position: relative;
  overflow: hidden;
  padding: 100px 24px 120px;
  background: linear-gradient(180deg, #0a1628 0%, #132744 40%, #1a3a5c 100%);
}

/* Spotlights from ceiling */
.hero-spotlights {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
}
.spotlight {
  position: absolute;
  top: -20px;
  width: 300px;
  height: 500px;
  background: radial-gradient(ellipse at top, rgba(240, 165, 0, 0.18) 0%, rgba(240, 165, 0, 0.06) 40%, transparent 70%);
  transform-origin: top center;
  animation: spotlight-sway 8s ease-in-out infinite;
}
.spotlight.s1 { left: 15%; animation-delay: 0s; }
.spotlight.s2 { left: 45%; animation-delay: -2s; }
.spotlight.s3 { left: 75%; animation-delay: -4s; }

@keyframes spotlight-sway {
  0%, 100% { transform: rotate(-5deg) scaleY(1); opacity: 0.7; }
  50% { transform: rotate(5deg) scaleY(1.05); opacity: 1; }
}

/* Entrance badge */
.hero-entrance-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 4px;
  color: var(--brand-accent);
  border: 2px solid var(--brand-accent);
  padding: 6px 20px;
  margin-bottom: 24px;
  position: relative;
}
.hero-entrance-badge::before,
.hero-entrance-badge::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 30px;
  height: 1px;
  background: var(--brand-accent);
  opacity: 0.5;
}
.hero-entrance-badge::before { right: 100%; margin-right: 16px; }
.hero-entrance-badge::after { left: 100%; margin-left: 16px; }

.hero-title {
  font-size: 4rem !important;
  font-weight: 900 !important;
  letter-spacing: 6px !important;
  margin-bottom: 12px !important;
  text-shadow: 0 0 60px rgba(240, 165, 0, 0.3);
  position: relative;
  display: inline-block;
}

.hero-subtitle {
  font-size: 1.15rem !important;
  color: rgba(255, 255, 255, 0.75) !important;
  margin-bottom: 32px !important;
  font-weight: 300 !important;
  letter-spacing: 1px;
}

/* Hall tag row */
.hero-hall-tags {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-bottom: 36px;
  flex-wrap: wrap;
}
.hall-tag {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.85);
  padding: 8px 20px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
}
.hall-tag:nth-child(1) {
  border-radius: 20px 0 0 20px;
  border-right: none;
  color: #93c5fd;
}
.hall-tag:nth-child(3) {
  border-right: none;
  color: #6ee7b7;
}
.hall-tag:nth-child(5) {
  border-radius: 0 20px 20px 0;
  color: #fcd34d;
}
.hall-divider {
  width: 1px;
  height: 20px;
  background: rgba(255, 255, 255, 0.15);
}

/* Exhibition style search */
.hero-search-exhibition {
  border: 2px solid rgba(240, 165, 0, 0.3) !important;
  box-shadow: 0 0 40px rgba(240, 165, 0, 0.15), 0 20px 40px rgba(0, 0, 0, 0.3) !important;
  background: rgba(255, 255, 255, 0.98) !important;
  backdrop-filter: blur(10px);
}
.search-icon-hall {
  display: flex;
  align-items: center;
  padding-left: 20px;
  font-size: 1.1rem;
  opacity: 0.5;
}

/* Floor reflection */
.hero-floor {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: linear-gradient(180deg, transparent 0%, rgba(240, 165, 0, 0.03) 50%, rgba(0, 0, 0, 0.2) 100%);
  pointer-events: none;
}
.floor-reflection {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(240, 165, 0, 0.3), transparent);
}

/* Hero stats exhibition style */
.hero-stats-exhibition {
  margin-top: 48px !important;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
}
.hero-stats-exhibition::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 2px;
  background: var(--brand-accent);
}

/* ---------- Section Headers - Exhibition Style ---------- */
.section-header-exhibition {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-bottom: 12px;
}
.section-line {
  flex: 0 0 80px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--brand-accent), transparent);
}
.section-title-exhibition {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--gray-900);
  letter-spacing: 3px;
  text-transform: uppercase;
  position: relative;
}

/* ---------- Pavilion Cards - Exhibition Hall Style ---------- */
.pavilions-exhibition {
  background: linear-gradient(180deg, #f8fafc 0%, #eef2f7 100%);
  position: relative;
}
.pavilions-exhibition::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 100%;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(37, 99, 235, 0.04) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(5, 150, 105, 0.04) 0%, transparent 50%);
  pointer-events: none;
}

.pavilion-grid-exhibition {
  gap: 0;
  position: relative;
}

.pavilion-grid-exhibition .pavilion-card {
  position: relative;
  border: none;
  border-radius: 0;
  background: white;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
  overflow: visible;
  margin: 10px;
}

/* Pavilion entrance frame */
.pavilion-grid-exhibition .pavilion-card::before {
  content: '';
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 14px;
  background: var(--gray-800);
  border-radius: 6px 6px 0 0;
  z-index: 2;
}
.pavilion-grid-exhibition .pavilion-card.cat-a::before { background: linear-gradient(180deg, #1e40af, #2563eb); }
.pavilion-grid-exhibition .pavilion-card.cat-b::before { background: linear-gradient(180deg, #047857, #059669); }
.pavilion-grid-exhibition .pavilion-card.cat-c::before { background: linear-gradient(180deg, #b45309, #d97706); }

.pavilion-grid-exhibition .pavilion-card::after {
  content: '';
  position: absolute;
  top: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 8px;
  height: 8px;
  background: var(--brand-accent);
  border-radius: 50%;
  box-shadow: -20px 0 0 var(--brand-accent), 20px 0 0 var(--brand-accent);
  z-index: 3;
}

.pavilion-grid-exhibition .pavilion-card-header {
  padding: 40px 28px 24px;
  border-bottom: 3px solid var(--gray-100);
  position: relative;
}
.pavilion-grid-exhibition .cat-a .pavilion-card-header { border-bottom-color: var(--cat-a); }
.pavilion-grid-exhibition .cat-b .pavilion-card-header { border-bottom-color: var(--cat-b); }
.pavilion-grid-exhibition .cat-c .pavilion-card-header { border-bottom-color: var(--cat-c); }

.pavilion-grid-exhibition .pavilion-icon-row {
  margin-top: 20px;
  opacity: 1;
  justify-content: center;
}
.pavilion-grid-exhibition .pavilion-icon-row .exhibit-svg {
  width: 80px !important;
  height: 60px !important;
}

.pavilion-grid-exhibition .pavilion-badge {
  font-size: 0.7rem;
  letter-spacing: 2px;
  padding: 6px 14px;
}

.pavilion-grid-exhibition .pavilion-card-body {
  padding: 20px 28px 28px;
}

/* ---------- Featured Booths - Exhibition Floor ---------- */
.exhibition-floor-section {
  background: var(--brand-bg);
  position: relative;
}
.booth-grid .exhibit-card {
  position: relative;
  border: 2px solid var(--gray-100);
  background: white;
}
.booth-grid .exhibit-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gray-300);
  border-radius: var(--radius) var(--radius) 0 0;
  z-index: 2;
}
.booth-grid .exhibit-card:hover::before {
  background: var(--brand-accent);
}
.booth-grid .exhibit-card-thumb {
  background: linear-gradient(135deg, #f1f5f9, #e2e8f0) !important;
  border-bottom: 1px solid var(--gray-100);
}

/* Booth number badge */
.booth-grid .exhibit-card .booth-number {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(0, 0, 0, 0.6);
  color: white;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  z-index: 3;
  letter-spacing: 1px;
}

/* ---------- Industry Intro - Gallery Style ---------- */
.industry-gallery-text {
  max-width: 900px;
  margin: 0 auto;
  color: var(--gray-600);
  font-size: 0.95rem;
  line-height: 1.9;
  position: relative;
  padding: 0 24px;
}
.industry-gallery-text p {
  position: relative;
  padding-left: 20px;
  margin-bottom: 16px;
}
.industry-gallery-text p::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 4px;
  height: 4px;
  background: var(--brand-accent);
  border-radius: 50%;
}

/* ---------- AI CTA - Booth Style ---------- */
.ai-cta-exhibition {
  position: relative;
  background: linear-gradient(135deg, #0f1c2e, #1a3a5c) !important;
  border: none !important;
  overflow: hidden;
}
.ai-cta-exhibition::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(240, 165, 0, 0.08), transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(37, 99, 235, 0.08), transparent 40%);
  pointer-events: none;
}
.ai-cta-exhibition .ai-booth-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

/* ---------- Print Styles ---------- */
@media print {
  .site-header, .site-footer, .back-to-top, .nav-mobile-toggle {
    display: none !important;
  }
  .exhibit-card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid var(--gray-200);
  }
}