body {
  font-family: sans-serif;
  background-color: #1b1b1b;
  color: #f5f5f5;
  max-width: 800px;
  margin: auto;
  padding: 20px;
}

header, footer {
  text-align: center;
  margin-bottom: 20px;
}

nav a {
  margin: 0 10px;
  color: #ffcc00;
  text-decoration: none;
}

article {
  border-bottom: 1px solid #444;
  padding: 10px 0;
}