/* Design Tokens - Light/Dark Theme Support */
:root {
  /* Primary Brand Colors */
  --color-primary-50: #eff6ff;
  --color-primary-100: #dbeafe;
  --color-primary-200: #bfdbfe;
  --color-primary-300: #93c5fd;
  --color-primary-500: #3b82f6;
  --color-primary-600: #2563eb;
  --color-primary-700: #1d4ed8;
  --color-primary-900: #1e3a8a;

  /* Neutral Colors */
  --color-neutral-0: #ffffff;
  --color-neutral-50: #f9fafb;
  --color-neutral-100: #f3f4f6;
  --color-neutral-200: #e5e7eb;
  --color-neutral-300: #d1d5db;
  --color-neutral-400: #9ca3af;
  --color-neutral-500: #6b7280;
  --color-neutral-600: #4b5563;
  --color-neutral-700: #374151;
  --color-neutral-800: #1f2937;
  --color-neutral-900: #111827;

  /* Semantic Colors */
  --color-success-50: #ecfdf5;
  --color-success-500: #10b981;
  --color-success-600: #059669;
  --color-warning-50: #fffbeb;
  --color-warning-500: #f59e0b;
  --color-warning-600: #d97706;
  --color-error-50: #fef2f2;
  --color-error-500: #ef4444;
  --color-error-600: #dc2626;

  /* Surface & Text Tokens */
  --surface-primary: var(--color-neutral-0);
  --surface-secondary: var(--color-neutral-50);
  --surface-tertiary: var(--color-neutral-100);
  --text-primary: var(--color-neutral-900);
  --text-secondary: var(--color-neutral-700);
  --text-tertiary: var(--color-neutral-500);
  --border-default: var(--color-neutral-200);
  --border-strong: var(--color-neutral-300);

  /* Typography */
  --font-family-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-family-mono: "JetBrains Mono", "Fira Code", Consolas, monospace;

  --text-xs: 0.75rem; /* 12px */
  --text-sm: 0.875rem; /* 14px */
  --text-base: 1rem; /* 16px */
  --text-lg: 1.125rem; /* 18px */
  --text-xl: 1.25rem; /* 20px */
  --text-2xl: 1.5rem; /* 24px */
  --text-3xl: 1.875rem; /* 30px */

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;

  /* Spacing */
  --space-1: 0.25rem; /* 4px */
  --space-2: 0.5rem; /* 8px */
  --space-3: 0.75rem; /* 12px */
  --space-4: 1rem; /* 16px */
  --space-5: 1.25rem; /* 20px */
  --space-6: 1.5rem; /* 24px */
  --space-8: 2rem; /* 32px */
  --space-10: 2.5rem; /* 40px */
  --space-12: 3rem; /* 48px */
  --space-16: 4rem; /* 64px */

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;

  /* Shadows */
  --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);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

  /* Motion */
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 350ms;
  --easing-standard: cubic-bezier(0.4, 0.0, 0.2, 1);
  --easing-enter: cubic-bezier(0.0, 0.0, 0.2, 1);
  --easing-exit: cubic-bezier(0.4, 0.0, 1, 1);

  /* Z-Index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-toast: 1080;
}

/* Dark Theme */
[data-theme="dark"] {
  --surface-primary: var(--color-neutral-900);
  --surface-secondary: var(--color-neutral-800);
  --surface-tertiary: var(--color-neutral-700);
  --text-primary: var(--color-neutral-50);
  --text-secondary: var(--color-neutral-300);
  --text-tertiary: var(--color-neutral-400);
  --border-default: var(--color-neutral-700);
  --border-strong: var(--color-neutral-600);

  /* Adjust semantic colors for dark mode */
  --color-primary-50: #1e3a8a;
  --color-primary-500: #60a5fa;
  --color-success-50: #064e3b;
  --color-success-500: #34d399;
  --color-warning-50: #451a03;
  --color-warning-500: #fbbf24;
  --color-error-50: #7f1d1d;
  --color-error-500: #f87171;

  /* Additional aliases used by page-level styles */
  --white: var(--color-neutral-800);
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  :root {
    --duration-fast: 0ms;
    --duration-normal: 0ms;
    --duration-slow: 0ms;
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  :root {
    --border-default: var(--color-neutral-900);
    --text-secondary: var(--color-neutral-900);
  }

  [data-theme="dark"] {
    --border-default: var(--color-neutral-0);
    --text-secondary: var(--color-neutral-0);
  }
}