body {
  font-family: Arial, sans-serif;
  background: #f5f5f5;
  color: #333;
  margin: 0;
}

header, footer {
  background: #222;
  color: #fff;
  text-align: center;
  padding: 20px;
}

main {
  max-width: 800px;
  margin: auto;
  padding: 20px;
  background: white;
}

section {
  margin-bottom: 30px;
}

a {
  color: #0066cc;
}