body {
  font-family: sans-serif;
  max-width: 900px;
  margin: 0 auto;
  padding: 20px;
  line-height: 1.7;
  color: #333;
}

header h1 {
  font-size: 24px;
  margin-bottom: 10px;
}

nav a {
  margin-right: 20px;
  text-decoration: none;
  color: #333;
}

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

h2 {
  margin-top: 40px;
  border-bottom: 1px solid #ccc;
  padding-bottom: 5px;
}

footer {
  margin-top: 40px;
  font-size: 12px;
  color: #666;
  text-align: center;
}