//details {
//  border: 1px solid #ccc;
//}
details:not(:last-child) {
  margin-bottom: 20px;
}
details summary {
//  list-style: none;
  cursor: pointer;
  padding: 14px;
  background: #e4e4e4;
  color: #005638;
  font-size: 20px;
  font-weight: bold;
}