/* ============================================================================
   SystemRS Design System v2.0
   Enterprise Design Tokens and Variables
   ============================================================================ */

/* -----------------------------------------------------------------------------
   1. CORE DESIGN TOKENS
   ----------------------------------------------------------------------------- */

:root {
  /* Spacing Scale (8px base unit) */
  --space-unit: 0.5rem;
  --space-xxs: calc(var(--space-unit) * 0.5);   /* 4px */
  --space-xs: calc(var(--space-unit) * 1);      /* 8px */
  --space-sm: calc(var(--space-unit) * 1.5);    /* 12px */
  --space-md: calc(var(--space-unit) * 2);      /* 16px */
  --space-lg: calc(var(--space-unit) * 3);      /* 24px */
  --space-xl: calc(var(--space-unit) * 4);      /* 32px */
  --space-2xl: calc(var(--space-unit) * 6);     /* 48px */
  --space-3xl: calc(var(--space-unit) * 8);     /* 64px */
  --space-4xl: calc(var(--space-unit) * 12);    /* 96px */

  /* Typography Scale */
  --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-family-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;

  --font-size-xxs: 0.625rem;    /* 10px */
  --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 */

  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-black: 900;

  --line-height-tight: 1.2;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  --line-height-loose: 2;

  --letter-spacing-tight: -0.02em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.025em;
  --letter-spacing-wider: 0.05em;
  --letter-spacing-widest: 0.1em;

  /* Border Radius */
  --radius-none: 0;
  --radius-xs: 0.125rem;    /* 2px */
  --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-3xl: 1.5rem;     /* 24px */
  --radius-full: 9999px;

  /* Shadow System */
  --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 0 rgba(0, 0, 0, 0.06);
  --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);

  /* Transitions */
  --transition-none: none;
  --transition-all: all 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 100ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: all 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slower: all 500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Animation Curves */
  --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 Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-notification: 1080;

  /* Container Widths */
  --container-xs: 20rem;     /* 320px */
  --container-sm: 24rem;     /* 384px */
  --container-md: 28rem;     /* 448px */
  --container-lg: 32rem;     /* 512px */
  --container-xl: 36rem;     /* 576px */
  --container-2xl: 42rem;    /* 672px */
  --container-3xl: 48rem;    /* 768px */
  --container-4xl: 56rem;    /* 896px */
  --container-5xl: 64rem;    /* 1024px */
  --container-6xl: 72rem;    /* 1152px */
  --container-7xl: 80rem;    /* 1280px */

  /* Grid System */
  --grid-cols: 12;
  --grid-gap: var(--space-md);

  /* Breakpoints */
  --breakpoint-xs: 475px;
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}

/* -----------------------------------------------------------------------------
   2. COLOR SYSTEM - DARK THEME (Default)
   ----------------------------------------------------------------------------- */

:root,
[data-theme="dark"] {
  /* Primary Brand Colors */
  --color-primary-50: #eef2ff;
  --color-primary-100: #e0e7ff;
  --color-primary-200: #c7d2fe;
  --color-primary-300: #a5b4fc;
  --color-primary-400: #818cf8;
  --color-primary-500: #667eea;  /* Main */
  --color-primary-600: #4f46e5;
  --color-primary-700: #4338ca;
  --color-primary-800: #3730a3;
  --color-primary-900: #312e81;
  --color-primary-950: #1e1b4b;

  /* Secondary Brand Colors */
  --color-secondary-50: #faf5ff;
  --color-secondary-100: #f3e8ff;
  --color-secondary-200: #e9d5ff;
  --color-secondary-300: #d8b4fe;
  --color-secondary-400: #c084fc;
  --color-secondary-500: #764ba2;  /* Main */
  --color-secondary-600: #9333ea;
  --color-secondary-700: #7e22ce;
  --color-secondary-800: #6b21a8;
  --color-secondary-900: #581c87;
  --color-secondary-950: #3b0764;

  /* Neutral Colors */
  --color-neutral-50: #f8fafc;
  --color-neutral-100: #f1f5f9;
  --color-neutral-200: #e2e8f0;
  --color-neutral-300: #cbd5e1;
  --color-neutral-400: #94a3b8;
  --color-neutral-500: #64748b;
  --color-neutral-600: #475569;
  --color-neutral-700: #334155;
  --color-neutral-800: #1e293b;
  --color-neutral-900: #0f172a;
  --color-neutral-950: #020617;

  /* Semantic Colors */
  --color-success-50: #f0fdf4;
  --color-success-100: #dcfce7;
  --color-success-200: #bbf7d0;
  --color-success-300: #86efac;
  --color-success-400: #4ade80;
  --color-success-500: #22c55e;  /* Main */
  --color-success-600: #16a34a;
  --color-success-700: #15803d;
  --color-success-800: #166534;
  --color-success-900: #14532d;

  --color-warning-50: #fffbeb;
  --color-warning-100: #fef3c7;
  --color-warning-200: #fde68a;
  --color-warning-300: #fcd34d;
  --color-warning-400: #fbbf24;
  --color-warning-500: #f59e0b;  /* Main */
  --color-warning-600: #d97706;
  --color-warning-700: #b45309;
  --color-warning-800: #92400e;
  --color-warning-900: #78350f;

  --color-error-50: #fef2f2;
  --color-error-100: #fee2e2;
  --color-error-200: #fecaca;
  --color-error-300: #fca5a5;
  --color-error-400: #f87171;
  --color-error-500: #ef4444;  /* Main */
  --color-error-600: #dc2626;
  --color-error-700: #b91c1c;
  --color-error-800: #991b1b;
  --color-error-900: #7f1d1d;

  --color-info-50: #eff6ff;
  --color-info-100: #dbeafe;
  --color-info-200: #bfdbfe;
  --color-info-300: #93c5fd;
  --color-info-400: #60a5fa;
  --color-info-500: #3b82f6;  /* Main */
  --color-info-600: #2563eb;
  --color-info-700: #1d4ed8;
  --color-info-800: #1e40af;
  --color-info-900: #1e3a8a;

  /* Dark Theme Specific Colors */
  --color-background: #000000;
  --color-background-secondary: #0a0a0a;
  --color-surface: rgba(255, 255, 255, 0.05);
  --color-surface-hover: rgba(255, 255, 255, 0.08);
  --color-surface-active: rgba(255, 255, 255, 0.12);
  --color-border: rgba(255, 255, 255, 0.1);
  --color-border-hover: rgba(255, 255, 255, 0.2);
  --color-text: #ffffff;
  --color-text-secondary: #94a3b8;
  --color-text-muted: #64748b;
  --color-text-disabled: #475569;
  --color-overlay: rgba(0, 0, 0, 0.5);
}

/* -----------------------------------------------------------------------------
   3. COLOR SYSTEM - LIGHT THEME
   ----------------------------------------------------------------------------- */

[data-theme="light"] {
  /* Light Theme Specific Colors */
  --color-background: #ffffff;
  --color-background-secondary: #f8fafc;
  --color-surface: rgba(0, 0, 0, 0.03);
  --color-surface-hover: rgba(0, 0, 0, 0.05);
  --color-surface-active: rgba(0, 0, 0, 0.08);
  --color-border: rgba(0, 0, 0, 0.1);
  --color-border-hover: rgba(0, 0, 0, 0.2);
  --color-text: #0f172a;
  --color-text-secondary: #475569;
  --color-text-muted: #94a3b8;
  --color-text-disabled: #cbd5e1;
  --color-overlay: rgba(0, 0, 0, 0.3);

  /* Adjust shadows for light theme */
  --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);
}

/* -----------------------------------------------------------------------------
   4. FOCUS STATES
   ----------------------------------------------------------------------------- */

:root {
  --focus-ring-color: var(--color-primary-500);
  --focus-ring-width: 3px;
  --focus-ring-offset: 2px;
}

/* Focus visible utilities */
.focus-visible:focus-visible,
*:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
  border-radius: var(--radius-md);
}

/* Remove default focus for mouse users */
:focus:not(:focus-visible) {
  outline: none;
}

/* -----------------------------------------------------------------------------
   5. RESPONSIVE UTILITIES
   ----------------------------------------------------------------------------- */

/* Responsive font sizes */
@media (max-width: 640px) {
  :root {
    --font-size-base: 0.875rem;  /* 14px on mobile */
  }
}

/* Container responsive padding */
@media (max-width: 768px) {
  :root {
    --container-padding: var(--space-md);
  }
}

@media (min-width: 769px) {
  :root {
    --container-padding: var(--space-lg);
  }
}

@media (min-width: 1280px) {
  :root {
    --container-padding: var(--space-xl);
  }
}

/* -----------------------------------------------------------------------------
   6. MOTION PREFERENCES
   ----------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  :root {
    --transition-none: none;
    --transition-all: none;
    --transition-fast: none;
    --transition-normal: none;
    --transition-slow: none;
    --transition-slower: none;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* -----------------------------------------------------------------------------
   7. PRINT STYLES
   ----------------------------------------------------------------------------- */

@media print {
  :root {
    --color-background: white;
    --color-text: black;
    --color-border: #ccc;
  }
}

/* -----------------------------------------------------------------------------
   8. HIGH CONTRAST MODE
   ----------------------------------------------------------------------------- */

@media (prefers-contrast: high) {
  :root {
    --color-border: rgba(255, 255, 255, 0.3);
    --color-text-muted: #e2e8f0;
  }

  [data-theme="light"] {
    --color-border: rgba(0, 0, 0, 0.3);
    --color-text-muted: #334155;
  }
}

/* -----------------------------------------------------------------------------
   9. UTILITY CLASSES
   ----------------------------------------------------------------------------- */

/* Spacing utilities */
.p-0 { padding: 0; }
.p-xs { padding: var(--space-xs); }
.p-sm { padding: var(--space-sm); }
.p-md { padding: var(--space-md); }
.p-lg { padding: var(--space-lg); }
.p-xl { padding: var(--space-xl); }
.p-2xl { padding: var(--space-2xl); }

.m-0 { margin: 0; }
.m-xs { margin: var(--space-xs); }
.m-sm { margin: var(--space-sm); }
.m-md { margin: var(--space-md); }
.m-lg { margin: var(--space-lg); }
.m-xl { margin: var(--space-xl); }
.m-2xl { margin: var(--space-2xl); }

/* Typography utilities */
.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }
.text-3xl { font-size: var(--font-size-3xl); }

.font-light { font-weight: var(--font-weight-light); }
.font-regular { font-weight: var(--font-weight-regular); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

/* Border radius utilities */
.rounded-none { border-radius: var(--radius-none); }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.rounded-full { border-radius: var(--radius-full); }

/* Shadow utilities */
.shadow-none { box-shadow: none; }
.shadow-xs { box-shadow: var(--shadow-xs); }
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }
.shadow-2xl { box-shadow: var(--shadow-2xl); }

/* Transition utilities */
.transition-none { transition: var(--transition-none); }
.transition-all { transition: var(--transition-all); }
.transition-fast { transition: var(--transition-fast); }
.transition-normal { transition: var(--transition-normal); }
.transition-slow { transition: var(--transition-slow); }

/* -----------------------------------------------------------------------------
   10. DOCUMENTATION
   ----------------------------------------------------------------------------- */

/*
  DESIGN TOKENS USAGE GUIDE:

  1. SPACING: Use the spacing scale for consistent margins and padding
     Example: padding: var(--space-md);

  2. COLORS: Always use semantic color tokens, not hex values
     Example: color: var(--color-text-secondary);

  3. TYPOGRAPHY: Use the type scale for all font sizes
     Example: font-size: var(--font-size-lg);

  4. SHADOWS: Use predefined shadows for elevation
     Example: box-shadow: var(--shadow-md);

  5. TRANSITIONS: Use transition variables for consistent animations
     Example: transition: var(--transition-normal);

  6. BORDERS: Use border radius tokens for consistent rounding
     Example: border-radius: var(--radius-lg);

  7. Z-INDEX: Use z-index scale for proper layering
     Example: z-index: var(--z-modal);
*/