ul.expander li {
  clear: both;
}

ul.expander {
  margin-top: 1em;
  margin-bottom: 1em;
}

ul.expander li.row {
  list-style-type: none;
  overflow: hidden;
}

ul.expander li:not(.row) {
  line-height: 2em;
}

ul.expander span.col {
  background: #CCC;
  width: 200px;
  height: 35px;
  display: block;
  float: left;
  text-align: center;
  margin-bottom: 0.2em;
  margin-right: 0.2em;
  padding-bottom: 1em;
  padding-top: 1em;
}

span.col.header {
  font-weight: bold;
  font-size: 1.2em;
}