/* Airport Guide (page-local) - adapted from archived/v3/Airport Guide/v2/style.css
   - No external font imports
   - Kept class names and layout structure similar
*/

:root {
  --primary-blue: var(--ntu-blue);
  --primary-blue-dark: #002f61;
  --primary-blue-light: #2a6496;
  --primary-blue-lighter: #e0f2fe;

  --accent-purple: #7c3aed;
  --accent-green: #10b981;
  --accent-orange: #f59e0b;
  --accent-red: #ef4444;

  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;

  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

.header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: var(--spacing-lg) 0;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-md);
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  text-decoration: none;
}

.logo-icon { font-size: 2.2rem; }

.logo-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--gray-900);
  line-height: 1.2;
  margin: 0;
}
.logo-subtitle { font-size: 0.9rem; color: var(--gray-500); margin: 0; }

.nav-actions{margin-left:auto;display:flex;gap:12px;align-items:center;}
.lang-toggle-btn{background:var(--primary-blue);color:#fff;border:none;border-radius:10px;padding:8px 12px;font-weight:600;cursor:pointer;}
.lang-toggle-btn:focus{outline:2px solid var(--primary-blue);outline-offset:2px;}

.nav-menu { display: flex; gap: var(--spacing-md); flex-wrap: wrap; }
.nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  color: var(--gray-600);
  font-weight: 600;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  position: relative;
}
.nav-link:hover { color: var(--primary-blue); background-color: var(--primary-blue-lighter); }
.nav-link.active { color: var(--primary-blue); background-color: var(--primary-blue-lighter); }

.main-content { min-height: 100vh; }

.section { padding: var(--spacing-3xl) 0; }
.section.alternate-bg { background-color: var(--gray-50); }
.section-container { max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-md); }
.section-header { text-align: center; margin-bottom: var(--spacing-3xl); }
.section-badge {
  display: inline-block;
  background: rgba(0, 61, 124, 0.1);
  color: var(--primary-blue);
  padding: 6px 12px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: var(--spacing-md);
}
.section-title { font-size: 2rem; font-weight: 900; margin-bottom: var(--spacing-sm); color: var(--gray-900); }
.section-description { color: var(--gray-600); max-width: 900px; margin: 0 auto; }

.hero-section { padding: var(--spacing-3xl) 0; }
.hero-container { max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-md); display: grid; grid-template-columns: 1.3fr 0.7fr; gap: var(--spacing-2xl); align-items: center; }
.hero-badge { display: inline-block; background: rgba(0, 61, 124, 0.1); color: var(--primary-blue); padding: 6px 12px; border-radius: 999px; font-weight: 800; font-size: 0.85rem; margin-bottom: var(--spacing-md); }
.hero-title { font-size: 2.5rem; font-weight: 900; color: var(--gray-900); line-height: 1.1; }
.gradient-text { background: linear-gradient(135deg, var(--primary-blue), var(--ntu-red)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-description { margin-top: var(--spacing-md); color: var(--gray-600); }
.hero-stats { display: flex; gap: var(--spacing-md); margin: var(--spacing-lg) 0; flex-wrap: wrap; }
.stat-item { text-align: center; min-width: 100px; }
.stat-number { font-size: 2rem; font-weight: 900; color: var(--primary-blue); }
.stat-label { color: var(--gray-600); font-size: 0.9rem; }
.stat-divider { width: 1px; background: var(--gray-200); }
.hero-actions { display: flex; gap: var(--spacing-md); flex-wrap: wrap; margin-top: var(--spacing-md); }
.btn-primary { display: inline-flex; align-items: center; justify-content: center; padding: 10px 14px; border-radius: 10px; background: var(--ntu-red); color: #fff; font-weight: 700; text-decoration: none; }
.btn-primary:hover { background: #b31225; }
.btn-secondary { display: inline-flex; align-items: center; gap: 8px; padding: 10px 14px; border-radius: 10px; background: var(--primary-blue); color: #fff; font-weight: 700; text-decoration: none; }
.btn-secondary:hover { background: var(--primary-blue-dark); }

.hero-image .image-placeholder { border-radius: var(--radius-xl); background: var(--gray-50); border: 1px solid var(--gray-200); padding: var(--spacing-2xl); min-height: 220px; display:flex; align-items:center; justify-content:center; box-shadow: var(--shadow-sm); }

.prep-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--spacing-lg); }
.prep-card { background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius-xl); padding: var(--spacing-lg); box-shadow: var(--shadow-sm); transition: transform var(--transition-normal), box-shadow var(--transition-normal); }
.prep-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.featured-card { border-color: rgba(199, 22, 43, 0.25); background: rgba(199, 22, 43, 0.03); }
.card-icon { font-size: 2rem; width: 46px; height: 46px; display:flex; align-items:center; justify-content:center; border-radius: 12px; margin-bottom: var(--spacing-md); background: rgba(0, 61, 124, 0.1); }
.card-title { font-weight: 800; color: var(--gray-900); margin-bottom: var(--spacing-sm); }
.card-subtitle { margin: 0 0 var(--spacing-sm); color: var(--gray-500); }
.requirement-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.requirement-item { display:flex; gap: 10px; color: var(--gray-700); }
.check-icon { color: var(--accent-green); font-weight: 900; }
.warning-icon { color: var(--accent-orange); }
.card-link { display:inline-flex; margin-top: var(--spacing-sm); font-weight: 800; color: var(--primary-blue); }
.card-link:hover { text-decoration: underline; }

.terminal-section { margin-top: var(--spacing-2xl); }
.subsection-title { font-size: 1.4rem; font-weight: 900; color: var(--gray-900); margin-bottom: var(--spacing-sm); }
.subsection-description { color: var(--gray-600); margin-bottom: var(--spacing-lg); }

.main-terminal-tabs { display:flex; gap: 8px; flex-wrap: wrap; }
.main-tab-btn { border: 1px solid var(--gray-200); background: #fff; padding: 10px 12px; border-radius: 10px; font-weight: 800; cursor: pointer; }
.main-tab-btn.active { border-color: var(--primary-blue); background: var(--primary-blue-lighter); color: var(--primary-blue); }

.zone-tabs { display:flex; gap: 8px; margin: var(--spacing-md) 0; flex-wrap: wrap; }
.zone-tab-btn { border: 1px solid var(--gray-200); background: #fff; padding: 8px 10px; border-radius: 10px; font-weight: 800; cursor: pointer; }
.zone-tab-btn.active { border-color: var(--primary-blue); background: var(--primary-blue-lighter); color: var(--primary-blue); }

.main-terminal-content { display: none; }
.main-terminal-content.active { display: block; }
.zone-content { display: none; }
.zone-content.active { display: block; }

.terminal-card { background:#fff; border: 1px solid var(--gray-200); border-radius: var(--radius-xl); padding: var(--spacing-lg); box-shadow: var(--shadow-sm); }
.terminal-header { display:flex; gap: 12px; align-items:center; margin-bottom: var(--spacing-md); }
.terminal-badge { background: var(--primary-blue); color: #fff; border-radius: 999px; padding: 4px 10px; font-weight: 900; }
.map-link-inside { margin-left: auto; text-decoration: none; font-size: 1.1rem; }
.navigation-guide .guide-box { display:flex; gap: 12px; align-items:flex-start; padding: var(--spacing-md); background: var(--gray-50); border-radius: var(--radius-lg); border: 1px solid var(--gray-200); }
.guide-icon { font-size: 1.4rem; }

@media (max-width: 1024px) {
  .hero-container { grid-template-columns: 1fr; }
  .prep-grid { grid-template-columns: 1fr; }
  .stat-divider { display: none; }
}