/* ============================================
   Design System - CSS Custom Properties
   Portfolio Website for Yousry Essam Ayoub
   ============================================ */

:root {
  /* ===== Color Palette ===== */

  /* Primary Colors */
  --primary-50: #eef2ff;
  --primary-100: #e0e7ff;
  --primary-200: #c7d2fe;
  --primary-300: #a5b4fc;
  --primary-400: #818cf8;
  --primary-500: #6366f1;
  --primary-600: #4f46e5;
  --primary-700: #4338ca;
  --primary-800: #3730a3;
  --primary-900: #312e81;

  /* Secondary Colors (Purple) */
  --secondary-400: #a78bfa;
  --secondary-500: #8b5cf6;
  --secondary-600: #7c3aed;

  /* Accent Colors (Cyan) */
  --accent-400: #22d3ee;
  --accent-500: #06b6d4;
  --accent-600: #0891b2;

  /* Success */
  --success-500: #22c55e;

  /* Warning */
  --warning-500: #f59e0b;

  /* ===== Gradients ===== */
  --gradient-primary: linear-gradient(135deg, var(--primary-500) 0%, var(--secondary-500) 100%);
  --gradient-accent: linear-gradient(135deg, var(--primary-600) 0%, var(--accent-500) 100%);
  --gradient-glow: linear-gradient(135deg, var(--primary-400) 0%, var(--secondary-400) 50%, var(--accent-400) 100%);

  /* ===== Typography ===== */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-arabic: 'Cairo', sans-serif;

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  --text-7xl: 4.5rem;

  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;

  /* Line Heights */
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

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

  /* ===== Border Radius ===== */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* ===== 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);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.3);
  --shadow-glow-lg: 0 0 60px rgba(99, 102, 241, 0.4);

  /* ===== Transitions ===== */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
  --transition-slower: 500ms ease;

  /* ===== Z-Index ===== */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-tooltip: 600;

  /* ===== Enhanced Animation Timing ===== */
  --ease-spring: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);

  /* ===== Enhanced Shadows & Glows ===== */
  --shadow-glow-sm: 0 0 15px rgba(99, 102, 241, 0.2);
  --shadow-glow-md: 0 0 30px rgba(99, 102, 241, 0.3);
  --shadow-glow-xl: 0 0 60px rgba(99, 102, 241, 0.4);
  --shadow-glow-purple: 0 0 40px rgba(139, 92, 246, 0.3);
  --shadow-glow-cyan: 0 0 40px rgba(6, 182, 212, 0.3);
  --shadow-colored: 0 20px 40px -15px rgba(99, 102, 241, 0.4);

  /* ===== Container ===== */
  --container-max: 1200px;
  --container-padding: var(--space-6);
}

/* ===== Dark Theme (Default) ===== */
[data-theme="dark"] {
  --bg-primary: #0a0a1a;
  --bg-secondary: #0f0f23;
  --bg-tertiary: #1a1a2e;
  --bg-card: rgba(26, 26, 46, 0.8);
  --bg-card-hover: rgba(30, 30, 56, 0.9);

  --surface-glass: rgba(255, 255, 255, 0.05);
  --surface-glass-hover: rgba(255, 255, 255, 0.08);
  --surface-border: rgba(255, 255, 255, 0.1);
  --surface-border-hover: rgba(255, 255, 255, 0.2);

  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-tertiary: #94a3b8;
  --text-muted: #64748b;

  --scrollbar-track: #1a1a2e;
  --scrollbar-thumb: #3730a3;
  --scrollbar-thumb-hover: #4f46e5;
}

/* ===== Light Theme ===== */
[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.9);
  --bg-card-hover: rgba(255, 255, 255, 1);

  --surface-glass: rgba(255, 255, 255, 0.7);
  --surface-glass-hover: rgba(255, 255, 255, 0.9);
  --surface-border: rgba(0, 0, 0, 0.1);
  --surface-border-hover: rgba(0, 0, 0, 0.15);

  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-tertiary: #475569;
  --text-muted: #64748b;

  --scrollbar-track: #f1f5f9;
  --scrollbar-thumb: #a5b4fc;
  --scrollbar-thumb-hover: #6366f1;
}

/* ===== RTL Support ===== */
[dir="rtl"] {
  --font-body: var(--font-arabic);
}

[dir="rtl"] h1,
[dir="rtl"] h2,
[dir="rtl"] h3,
[dir="rtl"] h4,
[dir="rtl"] h5,
[dir="rtl"] h6 {
  font-family: var(--font-arabic);
}