/* NTU Info - CSS Variables
 * Centralized design tokens for consistent styling
 * PROMPT_VERIFICATION: yhs
 */

:root {
  /* Primary Colors - NTU Official */
  --ntu-blue: #003366;
  --ntu-red: #d61d2a;
  --ntu-red-light: #e63946;
  --ntu-blue-light: #004a99;

  /* Extended Palette */
  --ntu-blue-lighter: #e6f0ff;
  --ntu-red-lighter: rgba(214, 29, 42, 0.05);
  --ntu-gray: #f4f6fb;
  --page-tint: #f5f7fc;
  --page-tint-alt: #eef3fb;
  --ntu-gray-dark: #64748b;

  /* Neutral Colors */
  --white: #ffffff;
  --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 */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 20px -12px rgba(15, 23, 42, 0.25);
  --shadow-lg: 0 18px 35px -18px rgba(15, 23, 42, 0.32);
  --shadow-xl: 0 28px 52px -24px rgba(15, 23, 42, 0.38);

  /* Transitions */
  --transition: all 0.2s ease;
  --transition-slow: all 0.3s ease;

  /* Z-index layers */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal: 400;
  --z-tooltip: 500;

  /* Floating promo banner */
  --floating-promo-height: 72px;

  /* Container widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1200px;
  --container-2xl: 1400px;

  /* Font families */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Fira Code', Consolas, Monaco, 'Andale Mono', monospace;

  /* Font sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;

  /* Line heights */
  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;

  /* GPA color classes */
  --gpa-excellent: #28a745;
  --gpa-good: #17a2b8;
  --gpa-average: #ffc107;
  --gpa-poor: #dc3545;
}