body {
  font-family: 'Nunito', sans-serif;
  max-width: 600px;
  margin: 4rem auto;
  padding: 0 1.5rem;
  line-height: 1.6;
  color: #222;
  background: #fff;
}
h1 { font-weight: 700; margin-bottom: 0.25rem; }
h2 { font-size: 1.15rem; margin: 2rem 0 0.5rem; }
h3 { font-size: 1rem; margin: 0.75rem 0 0.25rem; }
.lead { margin-top: 0; color: #555; }
ul { list-style: none; padding: 0; }
li { margin: 0.4rem 0; }
a { color: #222; }
footer { margin-top: 3rem; font-size: 0.85rem; color: #666; }
footer a { color: #666; }