:root {
  --bg: #fafafa;
  --fg: #1a1a1a;
  --accent: #0055aa;
  --muted: #666;
}

* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--fg);
  margin: 0;
  line-height: 1.6;
}

main {
  max-width: 640px;
  margin: 4rem auto;
  padding: 0 1.5rem;
}

h1 {
  color: var(--accent);
  font-size: 2.25rem;
  margin-bottom: 0.25rem;
}

.lede {
  font-size: 1.15rem;
  color: var(--muted);
  margin-top: 0;
}

footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid #ddd;
  color: var(--muted);
}

code {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  background: #eee;
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  font-size: 0.9em;
}