body {
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: #f9f9f9;
  color: #333;
}

header {
  background-color: #3f51b5;
  color: white;
  padding: 2rem 1rem;
  text-align: center;
}

main {
  padding: 1.5rem;
  max-width: 800px;
  margin: 0 auto;
}

h1, h2 {
  margin-top: 0;
}

section {
  background: #fff;
  margin: 1rem 0;
  padding: 1.2rem;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

footer {
  text-align: center;
  padding: 1rem;
  background-color: #eee;
  margin-top: 2rem;
}