body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #fdfdfd;
  line-height: 1.6;
  color: #333;
  max-width: 860px;
  margin: 2rem auto;
  padding: 0 1rem;
}
h1, h2, h3 {
  color: #003366;
}
a {
  color: #006699;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}
footer {
  margin-top: 3rem;
  font-size: 0.9rem;
  color: #777;
  text-align: center;
}