@media screen {

  body {
    color: black;
    background: transparent;
    text-align: justify;
    margin-left: 1cm;
    margin-right: 1cm;
  }

  h1,h2,h3,h4,h5,p.title,div.toc,span.appendix,
  span.chapter,span.sect1,span.sect2,span.sect3,
  div.list-of-tables {
    font-family: sans-serif;
  }

  h1.title,div.author,p.pubdate,div.abstract {
    text-align: center;
  }

  pre.screen {
    margin-left: 1cm;
    margin-right: 1cm;
    padding: 2mm;
    border-width: 0.4pt;
    border-style: solid;
    border-color: black;
    background-color: #efefef;
  }

  thead {
    background-color: #efefef;
  }

  thead,span.term {
    font-weight: bold;
  }

  tr {
    border-width: 0.4pt;
    border-color: black;
    border-style: solid;
  }
}