h1 {
  border-bottom: 2px solid black;
}

h2 {
  border-bottom: 1px solid black;
}

td {
  vertical-align: top;
  border: 1px solid black;
  padding: 5px;
}

pre {
  background-color: #ddd;
  padding: 3px;
  border: 1px solid #ccc;
}

pre code {
  font-size: 100%;
}

th {
  padding: 5px;
  background-color: #999;
  color: #fff;
  text-align: left;
  border: 1px solid black;
}

table {
  border-collapse: collapse;
  border: 1px solid black;
}

span.strong {
  font-weight: bold;
}