body {
  font-family: Arial;
  margin: 0;
  padding: 0;
  background: #f2f2f2;
}

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

section {
  padding: 20px;
  margin: 10px;
  background: white;
  border-radius: 8px;
}