body {
  margin-left: 210px;
  margin-right: 5%;
  color: black; background: #f8f8f8;
  font-family: sans-serif
}

h1 { font-size: 140%; margin-left: -20px; }
h2,h3,h4,h5,h6 { font-size: 115%; margin-left: -15px; }
pre {
  color: #2020ff; font-weight: bold; background: #eeeeff;
  border: solid; border-width: thin; width: 100%; padding: 0.8em;
  border-color: #9090A0;
  white-space: pre; font-family: monospace;
}

#ad1 {
  position: absolute;
  left: 10px;
}