body {
  font-family: Arial, sans-serif;
  margin: 0;
  background-color: #f4f4f4;
  color: #222;
}

header {
  background-color: #222;
  color: white;
  text-align: center;
  padding: 2rem;
}

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

section {
  background-color: white;
  padding: 1.5rem;
  margin-bottom: 1rem;
  border-radius: 8px;
}

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