/**
 * XPWD Website 2.0 - Design Tokens
 *
 * CSS Custom Properties for consistent theming
 * Version: 2.0.0
 * Last Updated: October 21, 2025
 */

:root {
  /* ================================
     COLOR SYSTEM
     ================================ */

  /* Primary Colors - Matrix Green Theme */
  --color-primary: #00ff41;
  --color-primary-dark: #00cc34;
  --color-primary-light: #33ff66;
  --color-primary-glow: rgba(0, 255, 65, 0.3);
  --color-primary-subtle: rgba(0, 255, 65, 0.1);

  /* Background Colors - Deep Space */
  --color-background: #0d1117;
  --color-background-alt: #161b22;
  --color-background-elevated: #1c2128;
  --color-background-overlay: rgba(13, 17, 23, 0.95);

  /* Alert & Status Colors */
  --color-alert: #ff6b6b;
  --color-alert-dark: #ff5252;
  --color-alert-glow: rgba(255, 107, 107, 0.3);

  --color-info: #58a6ff;
  --color-info-dark: #4493e6;
  --color-info-bg: rgba(88, 166, 255, 0.1);

  --color-success: #2ecc71;
  --color-success-dark: #27ae60;
  --color-success-bg: rgba(46, 204, 113, 0.1);

  --color-warning: #f39c12;
  --color-warning-dark: #e67e22;
  --color-warning-bg: rgba(243, 156, 18, 0.1);

  --color-error: #e74c3c;
  --color-error-dark: #c0392b;
  --color-error-bg: rgba(231, 76, 60, 0.1);

  --color-neutral: #7f8c8d;
  --color-neutral-bg: rgba(127, 140, 141, 0.1);

  /* Text Colors */
  --color-text-primary: #e6edf3;
  --color-text-secondary: #8b949e;
  --color-text-tertiary: #6e7681;
  --color-text-inverse: #0d1117;
  --color-text-disabled: #484f58;

  /* Border Colors */
  --color-border: #30363d;
  --color-border-subtle: #21262d;
  --color-border-focus: var(--color-primary);
  --color-border-hover: #484f58;

  /* Link Colors */
  --color-link: var(--color-info);
  --color-link-hover: var(--color-info-dark);
  --color-link-visited: #bc8cff;

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

  /* Font Families */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI',
                  'Roboto', 'Helvetica Neue', Arial, sans-serif;
  --font-heading: 'Space Grotesk', var(--font-primary);
  --font-mono: 'Fira Code', 'JetBrains Mono', 'SF Mono', Monaco,
               'Cascadia Code', Consolas, monospace;

  /* Font Sizes - Modular Scale (1.250 - Major Third) */
  --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: 1.563rem;    /* 25px */
  --text-3xl: 1.953rem;    /* 31px */
  --text-4xl: 2.441rem;    /* 39px */
  --text-5xl: 3.052rem;    /* 49px */
  --text-6xl: 3.815rem;    /* 61px */

  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-black: 900;

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

  /* Letter Spacing */
  --letter-spacing-tight: -0.02em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.05em;
  --letter-spacing-wider: 0.1em;

  /* ================================
     SPACING & SIZING
     ================================ */

  /* Spacing Scale - 8px base unit */
  --space-0: 0;
  --space-1: 0.25rem;    /* 4px */
  --space-2: 0.5rem;     /* 8px */
  --space-3: 0.75rem;    /* 12px */
  --space-4: 1rem;       /* 16px */
  --space-5: 1.5rem;     /* 24px */
  --space-6: 2rem;       /* 32px */
  --space-8: 3rem;       /* 48px */
  --space-10: 4rem;      /* 64px */
  --space-12: 6rem;      /* 96px */
  --space-16: 8rem;      /* 128px */
  --space-20: 10rem;     /* 160px */

  /* Container Widths */
  --container-xs: 640px;
  --container-sm: 768px;
  --container-md: 1024px;
  --container-lg: 1280px;
  --container-xl: 1536px;
  --container-content: 65ch;  /* Optimal reading width */

  /* Touch Targets (Minimum interactive size) */
  --touch-target-min: 48px;

  /* ================================
     BORDER & RADIUS
     ================================ */

  /* Border Widths */
  --border-width-thin: 1px;
  --border-width-medium: 2px;
  --border-width-thick: 4px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* ================================
     SHADOWS & ELEVATION
     ================================ */

  /* Box Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3),
               0 2px 4px -1px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3),
               0 4px 6px -2px rgba(0, 0, 0, 0.2);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.3),
               0 10px 10px -5px rgba(0, 0, 0, 0.2);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.4);

  /* Glow Effects (Cyber Aesthetic) */
  --glow-primary: 0 0 20px var(--color-primary-glow),
                  0 0 40px var(--color-primary-glow);
  --glow-alert: 0 0 20px var(--color-alert-glow);
  --glow-subtle: 0 0 10px rgba(0, 255, 65, 0.15);

  /* Inner Shadows */
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.3);

  /* ================================
     ANIMATION & TRANSITIONS
     ================================ */

  /* Transition Durations */
  --duration-instant: 0ms;
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 350ms;
  --duration-slower: 500ms;

  /* Timing Functions */
  --ease-linear: linear;
  --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);

  /* Common Transitions */
  --transition-base: all var(--duration-normal) var(--ease-in-out);
  --transition-fast: all var(--duration-fast) var(--ease-out);
  --transition-slow: all var(--duration-slow) var(--ease-in-out);

  /* ================================
     BREAKPOINTS
     ================================ */

  --breakpoint-sm: 480px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;

  /* ================================
     Z-INDEX LAYERS
     ================================ */

  --z-base: 0;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
  --z-notification: 800;
  --z-max: 9999;

  /* ================================
     ICONS
     ================================ */

  --icon-xs: 16px;
  --icon-sm: 20px;
  --icon-md: 24px;
  --icon-lg: 32px;
  --icon-xl: 48px;
  --icon-2xl: 64px;

  /* ================================
     FORM ELEMENTS
     ================================ */

  --input-height-sm: 36px;
  --input-height-md: 48px;
  --input-height-lg: 56px;

  --input-padding-x: var(--space-4);
  --input-padding-y: var(--space-3);

  /* ================================
     GRID & LAYOUT
     ================================ */

  --grid-gap: var(--space-6);
  --grid-gap-sm: var(--space-4);
  --grid-gap-lg: var(--space-8);

  --max-width-prose: 65ch;
  --max-width-wide: 80ch;

  /* ================================
     HEADER & FOOTER
     ================================ */

  --header-height: 72px;
  --header-height-mobile: 64px;
  --footer-height: auto;

  /* ================================
     CUSTOM PROPERTIES
     ================================ */

  /* Cyber Scan Line Effect */
  --scan-line-color: rgba(0, 255, 65, 0.05);

  /* Code Block Styling */
  --code-bg: var(--color-background-alt);
  --code-border: var(--color-border);
  --code-text: #e6edf3;

  /* Selection Color */
  --selection-bg: var(--color-primary);
  --selection-text: var(--color-text-inverse);
}

/* ================================
   DARK THEME (Default)
   ================================ */

[data-theme="dark"],
:root {
  color-scheme: dark;
}

/* ================================
   LIGHT THEME (Optional Future)
   ================================ */

[data-theme="light"] {
  /* Light theme overrides would go here */
  /* Not implemented in v2.0 - dark theme only */
}

/* ================================
   REDUCED MOTION
   ================================ */

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

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

/* ================================
   HIGH CONTRAST MODE
   ================================ */

@media (prefers-contrast: high) {
  :root {
    --color-primary: #00ff66;
    --color-text-primary: #ffffff;
    --color-background: #000000;
    --color-border: #ffffff;
  }
}

/* ================================
   PRINT STYLES
   ================================ */

@media print {
  :root {
    --color-background: #ffffff;
    --color-text-primary: #000000;
    --shadow-sm: none;
    --shadow-md: none;
    --shadow-lg: none;
    --shadow-xl: none;
  }
}

/* ================================
   UTILITY CLASSES USING TOKENS
   ================================ */

/* Text Colors */
.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-tertiary { color: var(--color-text-tertiary); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-error { color: var(--color-error); }
.text-info { color: var(--color-info); }

/* Background Colors */
.bg-primary { background-color: var(--color-primary); }
.bg-elevated { background-color: var(--color-background-elevated); }
.bg-alt { background-color: var(--color-background-alt); }

/* Spacing Utilities */
.m-0 { margin: var(--space-0); }
.m-1 { margin: var(--space-1); }
.m-2 { margin: var(--space-2); }
.m-3 { margin: var(--space-3); }
.m-4 { margin: var(--space-4); }
.m-5 { margin: var(--space-5); }
.m-6 { margin: var(--space-6); }

.p-0 { padding: var(--space-0); }
.p-1 { padding: var(--space-1); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-5 { padding: var(--space-5); }
.p-6 { padding: var(--space-6); }

/* Flex & Grid Utilities */
.flex { display: flex; }
.grid { display: grid; }
.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }

/* Alignment */
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }

/* Shadows */
.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); }

/* Border Radius */
.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-full { border-radius: var(--radius-full); }

/* ================================
   SELECTION STYLING
   ================================ */

::selection {
  background-color: var(--selection-bg);
  color: var(--selection-text);
}

::-moz-selection {
  background-color: var(--selection-bg);
  color: var(--selection-text);
}

/* ================================
   SCROLLBAR STYLING
   ================================ */

::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

::-webkit-scrollbar-track {
  background: var(--color-background);
}

::-webkit-scrollbar-thumb {
  background: var(--color-border-hover);
  border-radius: var(--radius-full);
  border: 2px solid var(--color-background);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-tertiary);
}

/* Firefox */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--color-border-hover) var(--color-background);
}

/* ================================
   END OF DESIGN TOKENS
   ================================ */