body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: #333;
  margin: 0;
  padding: 20px;
}

header {
  background: #2c3e50;
  color: white;
  padding: 1rem;
  margin-bottom: 2rem;
}

nav a {
  color: white;
  text-decoration: none;
  margin-right: 1rem;
}

footer {
  text-align: center;
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid #eee;
  color: #666;
}