:root {
  color-scheme: light dark;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

body {
  margin: 0 auto;
  max-width: 720px;
  padding: 48px 24px;
}

a { color: #147ce5; }
h1 { line-height: 1.15; }
.muted { color: #6b7280; }