#left-modules, #right-modules {
  display: none;
}

#content {
  margin: 0;
  padding: 0 5px;
}

#content blockquote {
  padding: 0.6em;
}

#content h2 {
  margin: 15px 0 5px 0;
}

#content span.new {
  color: red;
  font-style: normal;
  font-weight: bold;
}

#content table {
  border: 1px solid black;
  background-color: lightgrey;
  font-family: Courier;
}

#content table tr.conclusion {
  border-top: 1px solid black;
}

#content table.congruence {
  border: 1px solid black;
  background-color: lightgrey;
  margin: 0 1% 0 1%; /* top right bottom left */
  width: 98%;
  border:1px solid black;
  padding: 0 10px 0 10px;
  text-align: center;
}

#content table table {
  text-align: center;
  border: none;
}

#content th, #content td {
  border: none;
}

#content #computation tr td {
  padding: 1em;
}

#content #handin {
  border-top:2px solid #CC0000;
  border-bottom:2px solid #CC0000;
  padding: 0.6em;
  margin: 1em 0 1em 0;
}

#footer {
  margin: 16px 10px 0 10px;
}