body {
  font-family: Georgia, serif;
  margin: 0;
  line-height: 1.6;
  color: #222;
}
header {
  background: #0a2f4f;
  color: white;
  padding: 30px;
}
nav a {
  color: white;
  margin-right: 20px;
  text-decoration: none;
}
section {
  max-width: 900px;
  margin: auto;
  padding: 40px 20px;
}
footer {
  background: #f4f4f4;
  text-align: center;
  padding: 20px;
  font-size: 14px;
}