p{ 
   font-style:italic;
   font-weight:500;
   text-align:center;
   color: blue;
   }

H1:before { 
            display: inline;
            counter-increment: "chapter-num";
            content: counter( "chapter-num");
            couter-reset: "section-num";
 }


H2:before { 
            display: inline;
            counter-increment: "section-num";
            content: counter( "chapter-num") "." counter("section-num") ":";
 }