body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  background-color: #f9f9f9;
  color: #333;
}

header {
  background-color: #4CAF50;
  color: white;
  padding: 1rem;
  text-align: center;
}

header h1 {
  margin: 0;
}

nav {
  margin-top: 0.5rem;
}

nav a {
  color: white;
  margin: 0 1rem;
  text-decoration: none;
}

nav a:hover {
  text-decoration: underline;
}

main {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
  background: white;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0,0,0,0.05);
}

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