:root {
  --surface-page: #f6f5f2;
  --ink: #1a1a1a;
  --accent: #2b5fd9;
}
body { margin: 0; background: var(--surface-page); color: var(--ink); font: 16px/1.5 system-ui, sans-serif; }
main, .site-header, .site-footer { max-width: 60rem; margin: 0 auto; padding: 1rem; }