body {
  font-family: Arial, Helvetica, sans-serif;
  max-width: 900px;
  margin: 40px auto;
  padding: 0 20px;
  line-height: 1.6;
  color: #222;
}

nav {
  margin-bottom: 30px;
}

nav a {
  margin-right: 15px;
  text-decoration: none;
  color: #0056b3;
  font-weight: 500;
}

nav a:hover {
  text-decoration: underline;
}

h1 {
  margin-top: 0;
}

h2 {
  margin-top: 30px;
  border-bottom: 1px solid #ddd;
  padding-bottom: 5px;
}

footer {
  margin-top: 60px;
  padding-top: 20px;
  border-top: 1px solid #ddd;
  font-size: 0.9em;
  color: #666;
}