body h2 {
  padding: 1rem 2rem 1rem 0.5rem;
  border-left: 5px solid #000;
  background: #f4f4f4;
}
body h3 {
  padding: 0.5rem 2rem 0.5rem 0.5rem;
  border-left: 5px solid #000;
  border-bottom: 1px solid #000;
}
body h4 {
  padding: 0.1rem 2rem 0.1rem 0.5rem;
  border-left: 3px solid #000;
}
body ul {
  padding-left: 2rem;
}