/**
 * CSS Custom Properties - Design Tokens
 * All color, spacing, typography, and design variables
 */

:root {
  /* Color Palette - Light Theme */
  --color-primary: #3b82f6;
  --color-primary-light: #60a5fa;
  --color-primary-dark: #2563eb;
  --color-primary-alpha: rgba(59, 130, 246, 0.1);

  --color-success: #10b981;
  --color-success-light: #34d399;
  --color-success-dark: #059669;
  --color-success-alpha: rgba(16, 185, 129, 0.1);

  --color-warning: #f59e0b;
  --color-warning-light: #fbbf24;
  --color-warning-dark: #d97706;
  --color-warning-alpha: rgba(245, 158, 11, 0.1);

  --color-danger: #ef4444;
  --color-danger-light: #f87171;
  --color-danger-dark: #dc2626;
  --color-danger-alpha: rgba(239, 68, 68, 0.1);

  --color-info: #06b6d4;
  --color-info-light: #22d3ee;
  --color-info-dark: #0891b2;
  --color-info-alpha: rgba(6, 182, 212, 0.1);

  /* Neutral Colors */
  --color-white: #ffffff;
  --color-black: #000000;

  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  /* Semantic Colors - Light Theme */
  --color-background: var(--color-white);
  --color-surface: var(--color-gray-50);
  --color-surface-elevated: var(--color-white);
  --color-border: var(--color-gray-200);
  --color-border-hover: var(--color-gray-300);

  --color-text-primary: var(--color-gray-900);
  --color-text-secondary: var(--color-gray-600);
  --color-text-tertiary: var(--color-gray-500);
  --color-text-inverse: var(--color-white);

  /* 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 */

  /* Typography */
  --font-family-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  --font-family-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;

  --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-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: 1.75;

  /* 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-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slower: 500ms cubic-bezier(0.4, 0, 0.2, 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;

  /* Breakpoints (for JS usage) */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;

  /* Layout */
  --header-height: 4rem;      /* 64px */
  --sidebar-width: 16rem;     /* 256px */
  --sidebar-collapsed: 4rem;  /* 64px */
  --max-content-width: 1920px;
}

/* Dark Theme */
[data-theme="dark"] {
  /* Dark Color Palette */
  --color-primary: #60a5fa;
  --color-primary-light: #93c5fd;
  --color-primary-dark: #3b82f6;
  --color-primary-alpha: rgba(96, 165, 250, 0.1);

  --color-success: #34d399;
  --color-success-light: #6ee7b7;
  --color-success-dark: #10b981;
  --color-success-alpha: rgba(52, 211, 153, 0.1);

  --color-warning: #fbbf24;
  --color-warning-light: #fcd34d;
  --color-warning-dark: #f59e0b;
  --color-warning-alpha: rgba(251, 191, 36, 0.1);

  --color-danger: #f87171;
  --color-danger-light: #fca5a5;
  --color-danger-dark: #ef4444;
  --color-danger-alpha: rgba(248, 113, 113, 0.1);

  --color-info: #22d3ee;
  --color-info-light: #67e8f9;
  --color-info-dark: #06b6d4;
  --color-info-alpha: rgba(34, 211, 238, 0.1);

  /* Semantic Colors - Dark Theme */
  --color-background: var(--color-gray-900);
  --color-surface: var(--color-gray-800);
  --color-surface-elevated: var(--color-gray-700);
  --color-border: var(--color-gray-700);
  --color-border-hover: var(--color-gray-600);

  --color-text-primary: var(--color-gray-100);
  --color-text-secondary: var(--color-gray-400);
  --color-text-tertiary: var(--color-gray-500);
  --color-text-inverse: var(--color-gray-900);

  /* Adjusted Shadows for Dark Theme */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.4), 0 1px 2px -1px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

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