body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: #f9f9f9;
  color: #333;
}

header {
  background: #1a1a1a;
  color: #fff;
  padding: 2rem;
  text-align: center;
}

nav a {
  color: #f0f0f0;
  margin: 0 1rem;
  text-decoration: none;
}

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

main {
  padding: 2rem;
}

footer {
  text-align: center;
  padding: 1rem;
  background: #eeeeee;
  font-size: 0.9rem;
  margin-top: 3rem;
}