body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}
 
header {
  background-color: #333;
  color: white;
  padding: 20px;
}
 
header h1 {
  margin: 0;
}
 
nav {
  margin-top: 10px;
}
 
nav a {
  color: white;
  text-decoration: none;
  margin-right: 15px;
}
 
main {
  padding: 20px;
}
 
article {
  margin-bottom: 30px;
}
 
article h2 {
  margin-top: 0;
}
 
footer {
  background-color: #333;
  color: white;
  text-align: center;
  padding: 10px;
}