/* CSS Variables - Design Tokens */
:root {
  /* Colors - Primary */
  --color-primary: #0ea5e9;
  --color-primary-dark: #0284c7;
  --color-primary-light: #38bdf8;
  --color-primary-alpha-10: rgba(14, 165, 233, 0.1);
  --color-primary-alpha-20: rgba(14, 165, 233, 0.2);

  /* Colors - Secondary */
  --color-secondary: #06b6d4;
  --color-secondary-dark: #0891b2;
  --color-secondary-light: #22d3ee;
  --color-secondary-alpha-10: rgba(6, 182, 212, 0.1);
  --color-secondary-alpha-20: rgba(6, 182, 212, 0.2);

  /* Colors - Neutral */
  --color-white: #ffffff;
  --color-black: #000000;
  --color-gray-50: #fafafa;
  --color-gray-100: #f4f4f5;
  --color-gray-200: #e4e4e7;
  --color-gray-300: #d4d4d8;
  --color-gray-400: #a1a1aa;
  --color-gray-500: #71717a;
  --color-gray-600: #52525b;
  --color-gray-700: #3f3f46;
  --color-gray-800: #27272a;
  --color-gray-900: #18181b;

  /* Colors - Semantic */
  --color-success: #10b981;
  --color-error: #ef4444;
  --color-warning: #f59e0b;
  --color-info: #0ea5e9;

  /* Typography - Font Families */
  --font-primary:
    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "Fira Code", "Consolas", "Monaco", monospace;

  /* Typography - Font Sizes */
  --font-size-xs: 0.75rem; /* 12px */
  --font-size-sm: 0.875rem; /* 14px */
  --font-size-base: 1rem; /* 16px */
  --font-size-lg: 1.125rem; /* 18px */
  --font-size-xl: 1.25rem; /* 20px */
  --font-size-2xl: 1.5rem; /* 24px */
  --font-size-3xl: 1.875rem; /* 30px */
  --font-size-4xl: 2.25rem; /* 36px */
  --font-size-5xl: 3rem; /* 48px */
  --font-size-6xl: 3.75rem; /* 60px */
  --font-size-7xl: 4.5rem; /* 72px */

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

  /* Typography - Line Heights */
  --line-height-tight: 1.25;
  --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 */
  --space-32: 8rem; /* 128px */

  /* Border Radius */
  --radius-sm: 0.25rem; /* 4px */
  --radius-base: 0.5rem; /* 8px */
  --radius-lg: 0.75rem; /* 12px */
  --radius-xl: 1rem; /* 16px */
  --radius-2xl: 1.5rem; /* 24px */
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-base:
    0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md:
    0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg:
    0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl:
    0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Z-Index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;

  /* Breakpoints (for reference in JS) */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;

  /* Container */
  --container-max-width: 1280px;
  --container-padding: var(--space-6);

  /* Header */
  --header-height: 69px;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #0ea5e9 0%, #06b6d4 100%);
  --gradient-secondary: linear-gradient(135deg, #0284c7 0%, #0891b2 100%);
  --gradient-hover: linear-gradient(135deg, #38bdf8 0%, #22d3ee 100%);
}

/* Dark mode support (optional) */
@media (prefers-color-scheme: dark) {
  :root {
    /* Override colors for dark mode if needed */
  }
}