body {
  font-family: arial;

}

div.nav {
  position: fixed;
  left: 1%;
  top: 0px;
  width: 39%;
  height: 100%;
  overflow: auto;
  font-size: 0.7em;
}
div.content {
  float: right;
  width: 59%;
}

span.underline {
  text-decoration: underline;
}