body {
  counter-reset: h2counter;
}
  h1 {
    counter-reset: h2counter;
  }
  h2 {
    counter-reset: h3counter;
  }
  h2:before {
    content: "";
    counter-increment: h2counter;
  }
  h3:before {
    content: counter(h3counter) ".\0000a0\0000a0";
    counter-increment: h3counter;
  }
  h3 {
        font-size: larger;
  }