body {
  font-family: Arial, sans-serif;
  background: #f4f4f4;
  margin: 0;
  padding: 0;
  text-align: center;
}

header {
  background: #333;
  color: white;
  padding: 30px 10px;
}

section {
  background: white;
  margin: 20px auto;
  padding: 20px;
  width: 80%;
  max-width: 600px;
  border-radius: 8px;
}

footer {
  margin: 20px;
  color: #666;
}