body {
  font-family: Arial, sans-serif;
  max-width: 850px;
  margin: 0 auto;
  padding: 2rem;
  background-color: #f9f9f9;
  color: #333;
}

header {
  text-align: center;
}

h1 {
  margin-bottom: 0;
}

section {
  margin-top: 2rem;
}

footer {
  text-align: center;
  margin-top: 2rem;
  font-size: 0.9em;
  color: #666;
}