:root {
  --color-primary: #1d1d1f;
  --color-primary-dark: #000000;
  --color-primary-light: #d2d2d7;
  --color-secondary: #6e6e73;
  --color-accent: #0071e3;
  --color-accent-dark: #0058b0;
  --color-text: #1d1d1f;
  --color-text-muted: #6e6e73;
  --color-bg: #ffffff;
  --color-surface: #ffffff;
  --color-surface-elevated: #f5f5f7;
  --color-bg-alt: #f5f5f7;
  --color-border: #d2d2d7;
  --color-danger: #ff3b30;
  --gradient-hero: linear-gradient(180deg, #ffffff 0%, #f5f5f7 100%);
  --gradient-callout: linear-gradient(135deg, #1d1d1f 0%, #000000 100%);
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-head: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --container-max: 1120px;
  --radius: 18px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.12);
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

:root {
  color: var(--color-text);
  background: var(--color-bg);
  font-family: var(--font-sans);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  line-height: 1.6;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}