/**
 * Design Tokens - Project 1: Axioms of Strategy Games
 * 
 * A sophisticated dark theme with amber/gold accents evoking
 * the strategic depth and timeless nature of classic games.
 */

:root {
  /* ============================================================================
   * COLOR TOKENS
   * ============================================================================ */
  
  /* Primary Brand - Amber Gold */
  --color-primary: #F59E0B;
  --color-primary-light: #FBBF24;
  --color-primary-dark: #D97706;
  --color-primary-glow: rgba(245, 158, 11, 0.3);
  
  /* Secondary - Deep Slate */
  --color-secondary: #64748B;
  --color-secondary-light: #94A3B8;
  --color-secondary-dark: #475569;

  /* Theme Category Colors */
  --color-theme-termination: #EF4444;      /* Red - endings, inevitability */
  --color-theme-information: #3B82F6;      /* Blue - knowledge, clarity */
  --color-theme-agency: #10B981;           /* Emerald - choice, skill */
  --color-theme-balance: #8B5CF6;          /* Purple - symmetry, fairness */
  --color-theme-progression: #F97316;      /* Orange - movement, compression */
  --color-theme-cognitive: #EC4899;        /* Pink - mind, understanding */

  /* Background Colors - Dark Mode */
  --color-bg-deep: #0A0C10;
  --color-bg-primary: #0F1419;
  --color-bg-surface: #161B22;
  --color-bg-surface-elevated: #1C2128;
  --color-bg-surface-hover: #21262D;

  /* Background Colors - Light Mode */
  --color-bg-light-deep: #F1F5F9;
  --color-bg-light-primary: #F8FAFC;
  --color-bg-light-surface: #FFFFFF;
  --color-bg-light-elevated: #FFFFFF;
  --color-bg-light-hover: #F1F5F9;

  /* Text Colors - Dark Mode */
  --color-text-primary: #F0F6FC;
  --color-text-secondary: #8B949E;
  --color-text-muted: #6E7681;
  --color-text-accent: var(--color-primary);

  /* Text Colors - Light Mode */
  --color-text-light-primary: #0F172A;
  --color-text-light-secondary: #475569;
  --color-text-light-muted: #94A3B8;
  --color-text-light-accent: var(--color-primary-dark);

  /* Border Colors */
  --color-border-primary: #30363D;
  --color-border-secondary: #21262D;
  --color-border-accent: var(--color-primary);
  --color-border-glow: var(--color-primary-glow);

  /* Border Colors - Light Mode */
  --color-border-light-primary: #E2E8F0;
  --color-border-light-secondary: #CBD5E1;
  --color-border-light-accent: var(--color-primary);

  /* ============================================================================
   * TYPOGRAPHY TOKENS
   * ============================================================================ */

  /* Font Families - Distinctive choices */
  --font-display: 'Playfair Display', 'Crimson Pro', Georgia, serif;
  --font-body: 'DM Sans', 'Source Sans Pro', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Font sizes - granular scale */
  --font-size-11: 0.6875rem;    /* 11px */
  --font-size-12: 0.75rem;      /* 12px */
  --font-size-13: 0.8125rem;    /* 13px */
  --font-size-14: 0.875rem;     /* 14px */
  --font-size-15: 0.9375rem;    /* 15px */
  --font-size-16: 1rem;         /* 16px */
  --font-size-18: 1.125rem;     /* 18px */
  --font-size-19: 1.1875rem;     /* 19px */
  --font-size-20: 1.25rem;      /* 20px */
  --font-size-22: 1.375rem;     /* 22px */
  --font-size-24: 1.5rem;       /* 24px */
  --font-size-28: 1.75rem;      /* 28px */
  
  /* Semantic aliases */
  --font-size-sm: var(--font-size-12);
  --font-size-base: var(--font-size-13);
  --font-size-lg: var(--font-size-14);
  --font-size-4xl: 1.75rem;     /* 28px */
  --font-size-5xl: 2rem;        /* 32px */
  --font-size-6xl: 2.5rem;      /* 40px */  
  --font-size-7xl: 3rem;        /* 48px */
  --font-size-8xl: 4rem;        /* 64px */
  --font-size-9xl: 5rem;        /* 80px */
  --font-size-10xl: 6rem;       /* 96px */
  --font-size-11xl: 7rem;       /* 112px */
  --font-size-12xl: 8rem;       /* 128px */

  /* Icon sizes = font-size × line-height 1.2 (icons match adjacent text line height) */
  --icon-size-13: 16px;         /* 13px × 1.2 */
  --icon-size-14: 17px;         /* 14px × 1.2 */
  --icon-size-15: 18px;         /* 15px × 1.2 */
  --icon-size-16: 19px;         /* 16px × 1.2 */
  --icon-size-18: 22px;         /* 18px × 1.2 */
  --icon-size-20: 24px;         /* 20px × 1.2 */
  --icon-size-22: 26px;         /* 22px × 1.2 */
  --icon-size-24: 29px;         /* 24px × 1.2 */
  
  /* Semantic aliases */
  --icon-size-sm: var(--icon-size-14);
  --icon-size-base: var(--icon-size-16);
  --icon-size-lg: var(--icon-size-18);

  /* Font Weights */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Line Heights */
  --line-height-none: 1.0;
  --line-height-tight: 1.2;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;

  /* Letter Spacing */
  --letter-spacing-tight: -0.025em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.025em;
  --letter-spacing-wider: 0.05em;
  --letter-spacing-widest: 0.1em;

  /* ============================================================================
   * SPACING TOKENS
   * ============================================================================ */

  --spacing-px: 1px;
  --spacing-2px: 2px;
  --spacing-3px: 3px;
  --spacing-4px: 4px;
  --spacing-5px: 5px;
  --spacing-6px: 6px;
  --spacing-7px: 7px;
  --spacing-8px: 8px;
  --spacing-9px: 9px;
  --spacing-10px: 10px;
  --spacing-01: 0.1rem;
  --spacing-025: 0.25rem;
  --spacing-05: 0.5rem;
  --spacing-0: 0;
  --spacing-1: 0.25rem;   /* 4px */
  --spacing-2: 0.5rem;    /* 8px */
  --spacing-3: 0.75rem;   /* 12px */
  --spacing-4: 1rem;      /* 16px */
  --spacing-5: 1.25rem;   /* 20px */
  --spacing-6: 1.5rem;    /* 24px */
  --spacing-8: 2rem;      /* 32px */
  --spacing-10: 2.5rem;   /* 40px */
  --spacing-12: 3rem;     /* 48px */
  --spacing-16: 4rem;     /* 64px */
  --spacing-20: 5rem;     /* 80px */
  --spacing-24: 6rem;     /* 96px */

  /* ============================================================================
   * BORDER RADIUS TOKENS
   * 
   * Nested Container Rule: outer_radius = inner_radius + gap
   * ============================================================================ */

  --radius-none: 0;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 20px;
  --radius-3xl: 24px;
  --radius-full: 9999px;

  /* Nested container pairs - CRITICAL: outer = inner + gap */
  
  /* Axiom cards inside Theme cards: inner 8px + gap 12px = outer 20px */
  --radius-axiom-inner: var(--radius-md);       /* 8px */
  --radius-axiom-gap: var(--spacing-3);         /* 12px */
  --radius-axiom-outer: var(--radius-2xl);      /* 20px */

  /* Theme cards inside Concept card: inner 20px + gap 16px = outer 36px */
  --radius-theme-inner: var(--radius-2xl);      /* 20px */
  --radius-theme-gap: var(--spacing-4);         /* 16px */
  --radius-theme-outer: 36px;

  /* Concept card (outermost): standalone 36px */
  --radius-concept: 36px;

  /* ============================================================================
   * SHADOW TOKENS
   * ============================================================================ */

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
  
  /* Glow shadows */
  --shadow-glow-sm: 0 0 10px var(--color-primary-glow);
  --shadow-glow-md: 0 0 20px var(--color-primary-glow);
  --shadow-glow-lg: 0 0 30px var(--color-primary-glow), 0 0 60px var(--color-primary-glow);

  /* ============================================================================
   * TRANSITION TOKENS
   * ============================================================================ */

  --duration-instant: 0ms;
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;
  --duration-slower: 600ms;

  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);

  /* ============================================================================
   * Z-INDEX TOKENS
   * ============================================================================ */

  --z-base: 0;
  --z-elevated: 10;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal: 300;
  --z-tooltip: 400;
}

/* ============================================================================
 * THEME SWITCHING
 * ============================================================================ */

/* Dark theme (default) */
[data-theme="dark"],
:root {
  --color-bg: var(--color-bg-primary);
  --color-surface: var(--color-bg-surface);
  --color-surface-elevated: var(--color-bg-surface-elevated);
  --color-surface-hover: var(--color-bg-surface-hover);
  
  --color-text: var(--color-text-primary);
  --color-text-2: var(--color-text-secondary);
  --color-text-3: var(--color-text-muted);
  
  --color-border: var(--color-border-primary);
  --color-border-2: var(--color-border-secondary);
}

/* Light theme */
[data-theme="light"] {
  --color-bg: var(--color-bg-light-primary);
  --color-surface: var(--color-bg-light-surface);
  --color-surface-elevated: var(--color-bg-light-elevated);
  --color-surface-hover: var(--color-bg-light-hover);
  
  --color-text: var(--color-text-light-primary);
  --color-text-2: var(--color-text-light-secondary);
  --color-text-3: var(--color-text-light-muted);
  
  --color-border: var(--color-border-light-primary);
  --color-border-2: var(--color-border-light-secondary);
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}