/* ==========================================================================
   CSS Custom Properties (Design System Variables)
   ========================================================================== */

:root {
  /* Primary Colors - Dark Mode SaaS Theme */
  --color-primary: #6366F1;
  --color-primary-light: #818CF8;
  --color-primary-dark: #4F46E5;
  --color-primary-rgb: 99, 102, 241;

  /* Secondary Colors */
  --color-secondary: #10B981;
  --color-secondary-light: #34D399;
  --color-secondary-dark: #059669;

  /* Light Mode Backgrounds */
  --color-bg-primary: #FFFFFF;
  --color-bg-secondary: #F9FAFB;
  --color-bg-tertiary: #F3F4F6;
  --color-bg-card: rgba(255, 255, 255, 0.9);
  --color-bg-white: #FFFFFF;
  --color-bg-light: #F9FAFB;
  --color-bg-gray: #F3F4F6;
  --color-bg-dark: #111827;

  /* Text Colors - Light Mode */
  --color-text-primary: #111827;
  --color-text-secondary: #374151;
  --color-text-tertiary: #6B7280;
  --color-text-muted: #9CA3AF;
  --color-text-dark: #111827;
  --color-text-medium: #6B7280;
  --color-text-light: #9CA3AF;
  --color-text-white: #FFFFFF;

  /* Border Colors - Light Mode */
  --color-border: #E5E7EB;
  --color-border-light: #F3F4F6;
  --color-border-strong: #D1D5DB;
  --color-border-white: rgba(255, 255, 255, 0.2);

  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(0, 0, 0, 0.1);
  --glass-blur: blur(20px);

  /* Shadow Colors - Light Mode */
  --color-shadow: rgba(0, 0, 0, 0.08);
  --color-shadow-hover: rgba(0, 0, 0, 0.12);
  --color-shadow-dark: rgba(0, 0, 0, 0.15);
  --color-shadow-glow: rgba(99, 102, 241, 0.2);

  /* Gradients - Light Mode */
  --gradient-primary: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
  --gradient-secondary: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-secondary-dark) 100%);
  --gradient-hero: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
  --gradient-button: linear-gradient(135deg, #6366F1 0%, #7C3AED 100%);
  --gradient-glow: radial-gradient(circle at 50% 50%, rgba(99, 102, 241, 0.15) 0%, transparent 70%);

  /* Typography - Font Family */
  --font-family-primary: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Typography - Font Sizes */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 3rem;          /* 48px - H2 minimum */
  --font-size-5xl: 3.5rem;        /* 56px */
  --font-size-6xl: 4rem;          /* 64px - H1 minimum */
  --font-size-7xl: 4.5rem;        /* 72px */
  --font-size-8xl: 5rem;          /* 80px */
  --font-size-hero: clamp(3rem, 5vw, 5rem);

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

  /* Typography - Line Heights */
  --line-height-tight: 1.1;
  --line-height-snug: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;

  /* Typography - Letter Spacing */
  --letter-spacing-tight: -0.02em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.02em;

  /* 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 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.12);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Container */
  --container-max-width: 1280px;
  --container-padding: 1rem;

  /* Header Height */
  --header-height: 80px;

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

/* Dark Mode Variables (optional - for future use) */
@media (prefers-color-scheme: dark) {
  :root {
    /* Can be enabled later if needed */
  }
}