style.css

body {
    font-family: 'Source Sans Pro', 'PT Sans', Arial, sans-serif;
}

dl dt {
  float: left;
  width: 20px;
  text-align: center;
}

dl dd {
  margin-bottom: 1pt;
  width: ;
  margin-left: 18pt;
}
table {
  border-collapse: collapse;
}

tr {
  border: none;
}

td {
  border-right: 1px solid gray;
  padding: 3px;
  text-align: center;
}
table td:last-of-type {
  border: none;
}

table tr td.level-1, table tr td.vendor {
  font-weight: bold;
}

table tr td.level-2 {
  font-weight: 600;
}
table tr td.etc {
  font-style: italic;
}
ul li .number {
  font-weight: bolder;
}
ul li .back, ul li span.citation {
  font-size: smaller;
  color: lightgray;
  bottom: 2px;
  position: relative;
  padding-left: 2px;
}
ul li .back:hover {
  color: gray;
}
section#references {
  opacity: 0.7;
  font-size: smaller;
}