body {
  font-family: Arial, sans-serif;
  max-width: 800px;
  margin: auto;
  background: #f9f9f9;
  color: #333;
  padding: 20px;
}

header, nav, footer {
  background: #eaeaea;
  padding: 15px;
  margin-bottom: 20px;
}

nav a {
  margin-right: 15px;
  color: #0057b7;
  text-decoration: none;
}

article {
  background: #fff;
  padding: 15px;
  margin-bottom: 20px;
  border: 1px solid #ddd;
}

h1, h2 {
  color: #2c3e50;
}