body {
  font-family: Arial, sans-serif;
  color: #333;
}

header {
  margin-bottom: 2rem;
}

h1 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

h2 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

h3 {
  font-size: 1.2rem;
  margin-bottom: 0.2rem;
}

a {
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}