.concertina {
  border-bottom: solid 1px #ccc;
}
.concertina .header {
  background-color: #e6e6e6;
  border: solid 1px #ccc;
  border-bottom: none;
  padding: 12px;
  cursor: pointer;
}
.concertina .header.active {
	background-color: #3975b7;
	color: #ffffff;
}
.concertina .header h3, .concertina .header h4 {
  font-size: 14px;
  line-height: 1;
  padding: 0;
}
.concertina .panel {
	border-left: solid 1px #ccc;
	border-right: solid 1px #ccc;
	padding: 12px;
	overflow-y: auto;
}
.concertina .panel:after {
  clear: both;
  content: " ";
  display: block;
}
.concertina .panel:last-child {
  border-bottom: solid 1px #ccc;
}