:root {
  /* Colors */
  --color-background: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-secondary: #f1f5f9;

  --color-text-primary: #172033;
  --color-text-secondary: #667085;
  --color-text-muted: #98a2b3;

  --color-primary: #1e3a8a;
  --color-primary-hover: #172f70;
  --color-action: #2563eb;
  --color-action-hover: #1d4ed8;
  --color-accent: #0f9f9a;

  --color-border: #e2e8f0;
  --color-success: #15803d;
  --color-warning: #b45309;
  --color-error: #b42318;

  /* Layout */
  --container-width: 1240px;
  --header-height: 72px;

  /* Spacing (8px grid) */
  --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;

  /* Radius */
  --radius-small: 8px;
  --radius-medium: 12px;
  --radius-large: 20px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-small: 0 4px 12px rgb(15 23 42 / 6%);
  --shadow-medium: 0 12px 32px rgb(15 23 42 / 10%);

  /* Typography */
  --font-primary: "Inter", "Manrope", Arial, sans-serif;
  --font-heading: "Manrope", "Inter", Arial, sans-serif;

  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.82rem + 0.25vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1.05rem + 0.35vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.3rem + 1vw, 1.875rem);
  --text-3xl: clamp(1.875rem, 1.5rem + 1.5vw, 2.25rem);
  --text-4xl: clamp(2.25rem, 1.75rem + 2vw, 2.75rem);
  --text-5xl: clamp(2.75rem, 2rem + 3vw, 4rem);

  /* Transitions */
  --transition-fast: 160ms ease;
  --transition-base: 240ms ease;

  /* Breakpoints (reference) */
  --bp-sm: 576px;
  --bp-md: 768px;
  --bp-lg: 992px;
  --bp-xl: 1200px;

  /* Z-index scale */
  --z-dropdown: 100;
  --z-header: 200;
  --z-mobile-menu: 300;
  --z-modal: 400;
  --z-notification: 500;
}