body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f7f7f7;
  color: #222;
}

header {
  padding: 4rem 2rem;
  background: white;
  text-align: center;
}

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

section {
  background: white;
  margin-bottom: 1.5rem;
  padding: 1.5rem;
  border-radius: 12px;
}