body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f4f4f9;
  color: #333;
}
header {
  background: #003366;
  color: white;
  padding: 20px;
  text-align: center;
}
section {
  padding: 20px;
  margin: 10px;
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
footer {
  background: #003366;
  color: white;
  text-align: center;
  padding: 10px;
  margin-top: 20px;
}