walter-boente_book-collection/css/modules/_titles-counters.scss

#section__content{

    counter-reset: h1;

    h1{
        counter-increment: h1 1;
        counter-reset: h2;
    }

    h1::before{
        content: counter(h1, upper-alpha);

    }

    h2{
        counter-increment: h2 1;
        counter-reset: h3;
    }

    h2::before{
        content: counter(h2, upper-roman);
    }

     h3{
        counter-increment: h3 1;
        counter-reset: h4;
    }

    h3::before{
        content: counter(h3);
    }

    h4{
        counter-increment: h4 1;
        counter-reset: h5;
    }

    h4::before{
        content: counter(h4, lower-alpha) ". ";
    }

    h5{
        counter-increment: h5 1;
        counter-reset: h6;
    }

    h5::before{
        content: counter(h5, lower-alpha) counter(h5, lower-alpha) ". ";
    }
  }