body {
  font-family: sans-serif;
  background: gray;
  margin: 0;
  text-align: center;
}

#whole_page {
  width: 50em;
  margin: auto;
  padding: 0;
  text-align: left;
  border-width:  0 1px 1px 1px;
  border-color:  black;
  border-style:  solid;
}

#header {
  color: white;
  background: maroon; /* No "ruby" defined in HTML color names! */
  font-size: 24pt;
  padding: 0.25em;
  margin-bottom: 0;
}

#nav {
  color: black;
  font-size: 12pt;
  font-weight: bold;
  background: #ccc;
  padding: 0.5em;
}

#nav a, #nav a:visited  {
  color: maroon;
  text-decoration: none;
}

#nav a:hover {
  border-bottom: 2px dotted maroon;
}

#content {
  height: 100%;
  background:  white;
  padding: 1em;
}

#content h1 {
  font-size: 18pt;
}