ol>li:has(> h2)::before { font-size: 1.5rem; }
ol>li:has(> h3)::before { font-size: 1.25rem; }
li { margin: 0.5rem 0; }
h2 { margin-bottom: 1rem; }
h3 { font-weight: normal; }
h1, h2, h3, h4 { margin-top: 3rem; }
ol { counter-reset: index; list-style-type: none; padding-left: 2rem; }
ol>li::before {
  counter-increment: index;
  content: counters(index, '.', decimal) '.\a0';
  position: absolute;
  text-indent: -5rem;
  text-align: right;
}