/* ==========================================================================
   Settings: Design Tokens
   ========================================================================== */

/*
 * CSS Custom Properties for the design system.
 * These tokens should be used throughout the application for consistency.
 */

:root {
  /* ============================================================
     Color Primitives - Primary Scale
     ============================================================ */
  --color-primary-50: #eff6ff;
  --color-primary-100: #dbeafe;
  --color-primary-200: #bfdbfe;
  --color-primary-300: #93c5fd;
  --color-primary-400: #60a5fa;
  --color-primary-500: #3b82f6;
  --color-primary-600: #2563eb;
  --color-primary-700: #1d4ed8;
  --color-primary-800: #1e40af;
  --color-primary-900: #1e3a8a;
  --color-primary-950: #172554;

  /* ============================================================
     Color Primitives - Surface/Gray Scale
     ============================================================ */
  --color-surface-0: #ffffff;
  --color-surface-50: #f8fafc;
  --color-surface-100: #f1f5f9;
  --color-surface-200: #e2e8f0;
  --color-surface-300: #cbd5e1;
  --color-surface-400: #94a3b8;
  --color-surface-500: #64748b;
  --color-surface-600: #475569;
  --color-surface-700: #334155;
  --color-surface-800: #1e293b;
  --color-surface-900: #0f172a;
  --color-surface-950: #020617;

  /* ============================================================
     Color Primitives - Success Scale
     ============================================================ */
  --color-success-50: #f0fdf4;
  --color-success-100: #dcfce7;
  --color-success-200: #bbf7d0;
  --color-success-300: #86efac;
  --color-success-400: #4ade80;
  --color-success-500: #22c55e;
  --color-success-600: #16a34a;
  --color-success-700: #15803d;
  --color-success-800: #166534;
  --color-success-900: #14532d;
  --color-success-950: #052e16;

  /* ============================================================
     Color Primitives - Info Scale
     ============================================================ */
  --color-info-50: #f0f9ff;
  --color-info-100: #e0f2fe;
  --color-info-200: #bae6fd;
  --color-info-300: #7dd3fc;
  --color-info-400: #38bdf8;
  --color-info-500: #0ea5e9;
  --color-info-600: #0284c7;
  --color-info-700: #0369a1;
  --color-info-800: #075985;
  --color-info-900: #0c4a6e;
  --color-info-950: #082f49;

  /* ============================================================
     Color Primitives - Warning Scale
     ============================================================ */
  --color-warning-50: #fefce8;
  --color-warning-100: #fef9c3;
  --color-warning-200: #fef08a;
  --color-warning-300: #fde047;
  --color-warning-400: #facc15;
  --color-warning-500: #eab308;
  --color-warning-600: #ca8a04;
  --color-warning-700: #a16207;
  --color-warning-800: #854d0e;
  --color-warning-900: #713f12;
  --color-warning-950: #422006;

  /* ============================================================
     Color Primitives - Danger Scale
     ============================================================ */
  --color-danger-50: #fef2f2;
  --color-danger-100: #fee2e2;
  --color-danger-200: #fecaca;
  --color-danger-300: #fca5a5;
  --color-danger-400: #f87171;
  --color-danger-500: #ef4444;
  --color-danger-600: #dc2626;
  --color-danger-700: #b91c1c;
  --color-danger-800: #991b1b;
  --color-danger-900: #7f1d1d;
  --color-danger-950: #450a0a;

  /* ============================================================
     Semantic Tokens - Primary
     ============================================================ */
  --primary: var(--color-primary-500);
  --primary-emphasis: var(--color-primary-600);
  --primary-text: var(--color-primary-700);
  --primary-contrast: #ffffff;

  /* ============================================================
     Semantic Tokens - Surface
     ============================================================ */
  --surface-ground: var(--color-surface-50);
  --surface-section: var(--color-surface-0);
  --surface-card: var(--color-surface-0);
  --surface-overlay: var(--color-surface-0);
  --surface-border: var(--color-surface-200);
  --surface-hover: var(--color-surface-100);

  /* ============================================================
     Semantic Tokens - Content (Text)
     ============================================================ */
  --text-color: var(--color-surface-900);
  --text-color-secondary: var(--color-surface-600);
  --text-color-emphasis: var(--color-surface-950);
  --text-color-muted: var(--color-surface-500);

  /* ============================================================
     Semantic Tokens - State Colors
     ============================================================ */
  --success: var(--color-success-500);
  --success-emphasis: var(--color-success-600);
  --success-text: var(--color-success-700);
  --success-contrast: #ffffff;

  --info: var(--color-info-500);
  --info-emphasis: var(--color-info-600);
  --info-text: var(--color-info-700);
  --info-contrast: #ffffff;

  --warning: var(--color-warning-500);
  --warning-emphasis: var(--color-warning-600);
  --warning-text: var(--color-warning-700);
  --warning-contrast: #ffffff;

  --danger: var(--color-danger-500);
  --danger-emphasis: var(--color-danger-600);
  --danger-text: var(--color-danger-700);
  --danger-contrast: #ffffff;

  /* ============================================================
     Semantic Tokens - Focus
     ============================================================ */
  --focus-ring-width: 2px;
  --focus-ring-style: solid;
  --focus-ring-color: var(--color-primary-400);
  --focus-ring-offset: 2px;
  --focus-ring: var(--focus-ring-width) var(--focus-ring-style) var(--focus-ring-color);

  /* ============================================================
     Legacy Aliases (for backward compatibility)
     ============================================================ */
  --color-primary: var(--color-primary-500);
  --color-primary-dark: var(--color-primary-600);
  --color-primary-light: var(--color-primary-400);

  --color-success: var(--color-success-500);
  --color-success-dark: var(--color-success-600);
  --color-success-light: var(--color-success-400);

  --color-warning: var(--color-warning-500);
  --color-warning-dark: var(--color-warning-600);
  --color-warning-light: var(--color-warning-400);

  --color-danger: var(--color-danger-500);
  --color-danger-dark: var(--color-danger-600);
  --color-danger-light: var(--color-danger-400);

  --color-info: var(--color-info-500);
  --color-info-dark: var(--color-info-600);
  --color-info-light: var(--color-info-400);

  --color-white: #ffffff;
  --color-black: #000000;
  --color-gray-100: var(--color-surface-100);
  --color-gray-200: var(--color-surface-200);
  --color-gray-300: var(--color-surface-300);
  --color-gray-400: var(--color-surface-400);
  --color-gray-500: var(--color-surface-500);
  --color-gray-600: var(--color-surface-600);
  --color-gray-700: var(--color-surface-700);
  --color-gray-800: var(--color-surface-800);
  --color-gray-900: var(--color-surface-900);

  --color-text: var(--text-color);
  --color-text-muted: var(--text-color-muted);
  --color-text-light: var(--text-color-secondary);
  --color-text-inverse: #ffffff;

  --color-bg: var(--surface-section);
  --color-bg-secondary: var(--surface-ground);
  --color-bg-tertiary: var(--surface-hover);

  --color-border: var(--surface-border);
  --color-border-dark: var(--color-surface-300);
  --color-border-light: var(--color-surface-100);

  /* Spacing Scale */
  --space-xs: 0.25rem;    /* 4px */
  --space-sm: 0.5rem;     /* 8px */
  --space-md: 1rem;       /* 16px */
  --space-lg: 1.5rem;     /* 24px */
  --space-xl: 2rem;       /* 32px */
  --space-2xl: 3rem;      /* 48px */
  --space-3xl: 4rem;      /* 64px */
  --space-4xl: 6rem;      /* 96px */

  /* Typography - Font Families */
  --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-family-mono: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Typography - Font Sizes */
  --font-size-xs: 0.75rem;     /* 12px */
  --font-size-sm: 0.875rem;    /* 14px */
  --font-size-base: 1rem;      /* 16px */
  --font-size-lg: 1.125rem;    /* 18px */
  --font-size-xl: 1.25rem;     /* 20px */
  --font-size-2xl: 1.5rem;     /* 24px */
  --font-size-3xl: 1.875rem;   /* 30px */
  --font-size-4xl: 2.25rem;    /* 36px */
  --font-size-5xl: 3rem;       /* 48px */

  /* Typography - Font Weights */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Typography - Line Heights */
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  --line-height-loose: 2;

  /* Typography - Letter Spacing */
  --letter-spacing-tight: -0.025em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.025em;

  /* Border Radius */
  --radius-none: 0;
  --radius-sm: 0.25rem;    /* 4px */
  --radius-md: 0.375rem;   /* 6px */
  --radius-lg: 0.5rem;     /* 8px */
  --radius-xl: 0.75rem;    /* 12px */
  --radius-2xl: 1rem;      /* 16px */
  --radius-full: 9999px;

  /* Shadows */
  --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 -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);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);

  /* Z-index Scale */
  --z-index-dropdown: 1000;
  --z-index-sticky: 1020;
  --z-index-fixed: 1030;
  --z-index-modal-backdrop: 1040;
  --z-index-modal: 1050;
  --z-index-popover: 1060;
  --z-index-tooltip: 1070;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
  --transition-slower: 500ms ease;

  /* Transitions - Easing */
  --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);

  /* Max Widths - Container */
  --max-width-sm: 640px;
  --max-width-md: 768px;
  --max-width-lg: 1024px;
  --max-width-xl: 1280px;
  --max-width-2xl: 1536px;
  --max-width-full: 100%;

  /* Breakpoints (for reference in media queries) */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}