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

header {
  background: #4a90e2;
  color: white;
  text-align: center;
  padding: 2rem 1rem;
}

main {
  padding: 2rem;
}

section {
  background: white;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

footer {
  text-align: center;
  padding: 1rem;
  background: #222;
  color: white;
}