/* ==========================================================================
   THEME TOKENS & COLOR PALETTES
   Reda Mohamed Salah — Professional Developer Portfolio
   ========================================================================== */

:root {
  /* Common System Values */
  --font-sans-en: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-sans-ar: 'Cairo', 'IBM Plex Sans Arabic', -apple-system, BlinkMacSystemFont, 'Segoe UI', Tahoma, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, Monaco, monospace;
  
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  --z-base: 1;
  --z-sticky: 100;
  --z-header: 200;
  --z-modal-backdrop: 500;
  --z-modal: 600;
  --z-toast: 1000;
}

/* --------------------------------------------------------------------------
   DARK THEME (Default)
   -------------------------------------------------------------------------- */
[data-theme="dark"],
:root:not([data-theme="light"]) {
  color-scheme: dark;

  /* Surfaces & Backgrounds */
  --bg-app: #090d16;
  --bg-surface: #0f172a;
  --bg-surface-elevated: #1e293b;
  --bg-surface-hover: #334155;
  --bg-glass: rgba(15, 23, 42, 0.85);
  --bg-code: #070b12;

  /* Borders & Dividers */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.16);
  --border-active: rgba(56, 189, 248, 0.6);

  /* Typography / Content Colors */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #090d16;

  /* Brand Accents */
  --primary: #38bdf8;         /* Sky 400 */
  --primary-hover: #7dd3fc;   /* Sky 300 */
  --primary-glow: rgba(56, 189, 248, 0.25);
  --primary-surface: rgba(56, 189, 248, 0.12);

  --secondary: #34d399;       /* Emerald 400 */
  --secondary-glow: rgba(52, 211, 153, 0.2);
  --secondary-surface: rgba(52, 211, 153, 0.12);

  --accent-purple: #c084fc;   /* Purple 400 */
  --accent-amber: #fbbf24;    /* Amber 400 */

  /* UI Status */
  --status-success: #34d399;
  --status-info: #38bdf8;
  --status-warning: #fbbf24;
  --status-danger: #f87171;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -2px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.6), 0 4px 6px -4px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 25px rgba(56, 189, 248, 0.15);
}

/* --------------------------------------------------------------------------
   LIGHT THEME
   -------------------------------------------------------------------------- */
[data-theme="light"] {
  color-scheme: light;

  /* Surfaces & Backgrounds */
  --bg-app: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-surface-hover: #e2e8f0;
  --bg-glass: rgba(255, 255, 255, 0.88);
  --bg-code: #0f172a;

  /* Borders & Dividers */
  --border-subtle: rgba(15, 23, 42, 0.08);
  --border-medium: rgba(15, 23, 42, 0.16);
  --border-active: rgba(2, 132, 199, 0.6);

  /* Typography / Content Colors */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #f8fafc;

  /* Brand Accents */
  --primary: #0284c7;         /* Sky 600 */
  --primary-hover: #0369a1;   /* Sky 700 */
  --primary-glow: rgba(2, 132, 199, 0.2);
  --primary-surface: rgba(2, 132, 199, 0.08);

  --secondary: #059669;       /* Emerald 600 */
  --secondary-glow: rgba(5, 150, 105, 0.15);
  --secondary-surface: rgba(5, 150, 105, 0.08);

  --accent-purple: #9333ea;   /* Purple 600 */
  --accent-amber: #d97706;    /* Amber 600 */

  /* UI Status */
  --status-success: #059669;
  --status-info: #0284c7;
  --status-warning: #d97706;
  --status-danger: #dc2626;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.1), 0 2px 4px -2px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.1), 0 4px 6px -4px rgba(15, 23, 42, 0.05);
  --shadow-glow: 0 0 20px rgba(2, 132, 199, 0.12);
}