body{ color: #000000;
      background-color: #ffffff;
      font-size: medium;
      margin-left: 2em;
      margin-right: 2em;
      margin-top: 2em;
      margin-bottom: 2em;
      line-height: 1.5 }
h1,h2,h3,h4,h5,h6{ font-size: larger;
                   font-weight: bold }
h1{ text-align: center }
h2{ margin-left: 0em }
h3{ margin-left: 1em }
h4{ margin-left: 2em }
h5{ margin-left: 3em }
h6{ margin-left: 4em }
p{ text-indent: 1em }