body {
  font-family: 'Inter', -apple-system, sans-serif;
  max-width: 660px;
  margin: 0 auto;
  padding: 5rem 2rem;
  color: #333;
  background: #fafafa;
  line-height: 1.8;
  font-size: 18px;
}

h1, h2, strong { color: #111; }
h2 { margin-top: 2.5rem; }
a { color: #111; text-decoration-color: #bbb; text-underline-offset: 3px; }
hr { border: none; border-top: 1px solid #ddd; margin: 3rem 0; }
.subtitle { color: #777; }
.footer { margin-top: 4rem; border-top: 1px solid #ddd; padding-top: 2rem; font-size: 0.85rem; color: #aaa; }