body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  background-color: #f7f7f7;
  color: #333;
}

header {
  background-color: #4a90e2;
  color: white;
  padding: 1rem 2rem;
  text-align: center;
}

main {
  padding: 2rem;
  max-width: 800px;
  margin: 0 auto;
}

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