/* Exam Concepts - Design Tokens */
/* Steel Blue + Gold Premium Theme */

:root {
  /* Primary Colors - Steel Blue Family */
  --color-steel-900: #0a1628;
  --color-steel-800: #0f1d33;
  --color-steel-700: #162544;
  --color-steel-600: #1e3055;
  --color-steel-500: #2a4066;
  --color-steel-400: #3d5a80;
  --color-steel-300: #5a7aa3;
  --color-steel-200: #8fa4c4;
  --color-steel-100: #c5d4e8;
  --color-steel-50: #e8eef7;
  
  /* Gold/Bronze Family */
  --color-gold-900: #4a3418;
  --color-gold-800: #6b4a1f;
  --color-gold-700: #8c6126;
  --color-gold-600: #b07d2e;
  --color-gold-500: #d49a3a;
  --color-gold-400: #e8b54a;
  --color-gold-300: #f0c96b;
  --color-gold-200: #f5db8f;
  --color-gold-100: #faedb8;
  --color-gold-50: #fdf8e8;
  
  /* Paper/Off-White Backgrounds */
  --color-paper-100: #fefefe;
  --color-paper-200: #faf8f5;
  --color-paper-300: #f5f2ed;
  --color-paper-400: #ebe6de;
  
  /* Semantic Colors */
  --color-primary: var(--color-steel-600);
  --color-primary-dark: var(--color-steel-800);
  --color-primary-light: var(--color-steel-400);
  
  --color-accent: var(--color-gold-500);
  --color-accent-dark: var(--color-gold-600);
  --color-accent-light: var(--color-gold-400);
  
  --color-bg-primary: var(--color-paper-100);
  --color-bg-secondary: var(--color-paper-200);
  --color-bg-tertiary: var(--color-paper-300);
  
  --color-text-primary: var(--color-steel-900);
  --color-text-secondary: var(--color-steel-600);
  --color-text-muted: var(--color-steel-400);
  --color-text-inverse: var(--color-paper-100);
  
  /* Gradients */
  --gradient-hero: linear-gradient(135deg, var(--color-steel-900) 0%, var(--color-steel-700) 50%, var(--color-steel-600) 100%);
  --gradient-gold: linear-gradient(135deg, var(--color-gold-600) 0%, var(--color-gold-400) 50%, var(--color-gold-300) 100%);
  --gradient-card: linear-gradient(180deg, var(--color-paper-100) 0%, var(--color-paper-200) 100%);
  --gradient-shine: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.1) 50%, transparent 100%);
  
  /* Typography */
  --font-display: 'Playfair Display', 'Times New Roman', serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 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;
  --text-6xl: 3.75rem;
  --text-7xl: 4.5rem;
  
  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  
  /* Line Heights */
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(10, 22, 40, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(10, 22, 40, 0.1), 0 2px 4px -2px rgba(10, 22, 40, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(10, 22, 40, 0.1), 0 4px 6px -4px rgba(10, 22, 40, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(10, 22, 40, 0.1), 0 8px 10px -6px rgba(10, 22, 40, 0.1);
  --shadow-gold: 0 4px 14px 0 rgba(212, 154, 58, 0.25);
  --shadow-gold-lg: 0 8px 28px 0 rgba(212, 154, 58, 0.3);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
  
  /* Z-Index Scale */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
}

/* Dark mode overrides for hero/footer sections */
.dark-section {
  --color-text-primary: var(--color-paper-100);
  --color-text-secondary: var(--color-steel-200);
  --color-text-muted: var(--color-steel-300);
  --color-bg-primary: var(--color-steel-900);
  --color-bg-secondary: var(--color-steel-800);
}

/* Utility classes for common patterns */
.text-gradient-gold {
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.bg-pattern-paper {
  background-color: var(--color-paper-200);
  background-image: 
    radial-gradient(circle at 25% 25%, rgba(212, 154, 58, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 75% 75%, rgba(30, 48, 85, 0.03) 0%, transparent 50%);
}

.border-gold {
  border-color: var(--color-gold-400);
}

.border-steel {
  border-color: var(--color-steel-300);
}