/* ==========================================
   CSS Variables - Design Tokens
   ========================================== */

:root {
  /* ========== Color Palette ========== */
  
  /* Primary Colors */
  --primary-50: #f0f4ff;
  --primary-100: #e0e8ff;
  --primary-200: #c7d4ff;
  --primary-300: #a4b8ff;
  --primary-400: #7a91ff;
  --primary-500: #667eea;
  --primary-600: #5a67d8;
  --primary-700: #4c51bf;
  --primary-800: #434190;
  --primary-900: #3c366b;
  
  /* Secondary/Accent */
  --accent-400: #a78bfa;
  --accent-500: #764ba2;
  --accent-600: #6b46a3;
  
  /* ========== Light Mode Colors ========== */
  --bg-light: #e8eef5;
  --bg-light-secondary: #dfe6ed;
  --surface-light: #e0e5ec;
  --text-light: #2d3748;
  --text-light-secondary: #4a5568;
  --text-light-muted: #718096;
  
  /* Neumorphic Shadows - Light */
  --neu-shadow-light: 8px 8px 20px #c5ccd6;
  --neu-shadow-light-invert: -8px -8px 20px #ffffff;
  --neu-shadow-light-pressed: inset 4px 4px 10px #c5ccd6, inset -4px -4px 10px #ffffff;
  --neu-shadow-light-hover: 12px 12px 24px #c5ccd6, -12px -12px 24px #ffffff;
  
  /* ========== Dark Mode Colors ========== */
  --bg-dark: #1a1a2e;
  --bg-dark-secondary: #16162a;
  --surface-dark: #25253d;
  --text-dark: #f7fafc;
  --text-dark-secondary: #e2e8f0;
  --text-dark-muted: #a0aec0;
  
  /* Neumorphic Shadows - Dark */
  --neu-shadow-dark: 8px 8px 20px #121220;
  --neu-shadow-dark-invert: -8px -8px 20px #2e2e4a;
  --neu-shadow-dark-pressed: inset 4px 4px 10px #121220, inset -4px -4px 10px #2e2e4a;
  --neu-shadow-dark-hover: 12px 12px 24px #121220, -12px -12px 24px #2e2e4a;
  
  /* ========== Glassmorphism ========== */
  --glass-bg-light: rgba(255, 255, 255, 0.25);
  --glass-bg-dark: rgba(255, 255, 255, 0.08);
  --glass-border-light: rgba(255, 255, 255, 0.35);
  --glass-border-dark: rgba(255, 255, 255, 0.12);
  --glass-blur: 20px;
  
  /* ========== Gradient Backgrounds ========== */
  --gradient-hero-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-hero-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-hero-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-hero-4: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
  --gradient-hero-5: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
  --gradient-hero-6: linear-gradient(135deg, #a18cd1 0%, #fbc2eb 100%);
  
  /* ========== Typography ========== */
  --font-primary: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Playfair Display', Georgia, serif;
  
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-md: 1.125rem;   /* 18px */
  --font-size-lg: 1.25rem;    /* 20px */
  --font-size-xl: 1.5rem;     /* 24px */
  --font-size-2xl: 2rem;      /* 32px */
  --font-size-3xl: 2.5rem;    /* 40px */
  --font-size-4xl: 3rem;      /* 48px */
  --font-size-5xl: 4rem;      /* 64px */
  
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  
  /* ========== Spacing ========== */
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */
  
  /* ========== Border Radius ========== */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  --radius-full: 9999px;
  
  /* ========== Transitions ========== */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;
  --transition-smooth: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* ========== Z-Index ========== */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal-backdrop: 900;
  --z-modal: 1000;
  --z-tooltip: 1100;
  
  /* ========== Current Theme (Default: Light) ========== */
  --bg: var(--bg-light);
  --bg-secondary: var(--bg-light-secondary);
  --surface: var(--surface-light);
  --text: var(--text-light);
  --text-secondary: var(--text-light-secondary);
  --text-muted: var(--text-light-muted);
  --neu-shadow: var(--neu-shadow-light);
  --neu-shadow-invert: var(--neu-shadow-light-invert);
  --neu-shadow-pressed: var(--neu-shadow-light-pressed);
  --neu-shadow-hover: var(--neu-shadow-light-hover);
  --glass-bg: var(--glass-bg-light);
  --glass-border: var(--glass-border-light);
}

/* ========== Dark Mode ========== */
[data-theme="dark"] {
  --bg: var(--bg-dark);
  --bg-secondary: var(--bg-dark-secondary);
  --surface: var(--surface-dark);
  --text: var(--text-dark);
  --text-secondary: var(--text-dark-secondary);
  --text-muted: var(--text-dark-muted);
  --neu-shadow: var(--neu-shadow-dark);
  --neu-shadow-invert: var(--neu-shadow-dark-invert);
  --neu-shadow-pressed: var(--neu-shadow-dark-pressed);
  --neu-shadow-hover: var(--neu-shadow-dark-hover);
  --glass-bg: var(--glass-bg-dark);
  --glass-border: var(--glass-border-dark);
}