body {
  font-family: system-ui, sans-serif;
  font-size: 18px;
  line-height: 1.6;
  color: #222;
  background-color: #f9f9f9;
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1rem;
}
h1, h2, h3 {
  font-family: Georgia, serif;
  color: #004477;
  margin-top: 2rem;
}
h1 {
  font-size: 2rem;
  border-bottom: 2px solid #004477;
  padding-bottom: 0.3rem;
}
h2 {
  font-size: 1.5rem;
  margin-top: 1.5rem;
}
h3 {
  font-size: 1.25rem;
  color: #336699;
}
ul {
  margin: 1rem 0;
  padding-left: 1.5rem;
}
ul li {
  margin-bottom: 0.5rem;
}
p {
  margin: 1rem 0;
}
em {
  color: #666;
  font-style: italic;
  display: block;
  margin-top: 1rem;
}
a {
  color: #004477;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}