body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f9fafb;
  color: #333;
  text-align: center;
}

header {
  background: #2563eb;
  color: white;
  padding: 2rem 1rem;
}

main {
  padding: 2rem 1rem;
}

footer {
  background: #f3f4f6;
  padding: 1rem;
  font-size: 0.9rem;
}