* { box-sizing: border-box; }
body {
  font-family: system-ui, -apple-system, sans-serif;
  max-width: 36rem;
  margin: 2rem auto;
  padding: 0 1.25rem 3rem;
  color: #1a1a1a;
  background: #fafafa;
  line-height: 1.5;
}
h1 { font-size: 1.5rem; margin: 0 0 0.5rem; }
h2 { font-size: 1.1rem; margin: 1.5rem 0 0.75rem; }
p, li { font-size: 0.95rem; }
.lead { color: #444; margin-bottom: 1.5rem; }
a { color: #0b57d0; }
nav { margin: 1.5rem 0; }
nav a {
  display: inline-block;
  margin: 0.25rem 0.5rem 0.25rem 0;
  padding: 0.5rem 0.75rem;
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 8px;
  text-decoration: none;
  color: #111;
}
nav a:hover { border-color: #999; }
ol { padding-left: 1.25rem; }
ol li { margin: 0.5rem 0; }
img {
  max-width: 100%;
  border: 1px solid #ddd;
  border-radius: 8px;
  margin: 0.75rem 0;
}
.note {
  background: #fff8e1;
  border: 1px solid #ffe082;
  border-radius: 8px;
  padding: 0.75rem 1rem;
  margin: 1rem 0;
  font-size: 0.9rem;
}