body {
  font-family: sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  background: #f8f8f8;
  color: #333;
}

header {
  background: #234;
  color: white;
  padding: 1rem;
  text-align: center;
}

nav {
  background: #ddd;
  padding: 1rem;
}

nav ul {
  list-style: none;
  padding: 0;
}

nav li {
  margin-bottom: 0.5rem;
}

nav a {
  color: #234;
  text-decoration: none;
}

main {
  padding: 2rem;
  background: white;
  max-width: 900px;
  margin: auto;
}

footer {
  text-align: center;
  font-size: 0.9rem;
  color: #666;
  padding: 1rem;
  background: #eee;
  margin-top: 2rem;
}