body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  background: #f4f4f4;
  color: #333;
  line-height: 1.6;
}

header {
  background: #222;
  color: white;
  padding: 2rem;
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: 2.5rem;
}

header p {
  margin: 0.5rem 0 0;
  font-size: 1.2rem;
  color: #ccc;
}

main {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
}

section {
  margin-bottom: 2rem;
}

h2 {
  color: #444;
}

footer {
  text-align: center;
  padding: 1rem;
  background: #e0e0e0;
  font-size: 0.9rem;
  color: #555;
}