body {
  font-family: system-ui, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f8f9fa;
  color: #212529;
}
header {
  background-color: #343a40;
  color: white;
  padding: 2rem 1rem;
  text-align: center;
}
header h1 {
  margin: 0;
  font-size: 2rem;
}
header p {
  margin-top: 0.5rem;
  font-size: 1.1rem;
  color: #ced4da;
}
section {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
}
h2 {
  color: #495057;
  margin-top: 2rem;
}
ul {
  padding-left: 1.5rem;
}
footer {
  text-align: center;
  font-size: 0.9rem;
  color: #6c757d;
  margin: 3rem 0 1rem;
}