  .chapter { background-color:#d0e4fe; }
  .section { background-color:#d0e4fe; }
  .subsection { background-color:#d0e4fe; }
  .settitle { background-color:#d0e4fe; }
  .contents { border: 2px solid black;
              margin: 1cm 1cm 1cm 1cm; 
              padding-left: 3mm; }
  body { padding-left: 3mm; }