.collapsible {
  background-color:cornflowerblue;
  color: white;
  cursor: pointer;
  padding: 18px;
  width: 100%;
  border: none;
  text-align: left;
  outline: none;
  font-size: 1em;
}

.active, .collapsible:hover {
  background-color: #555;
}

.content {
  padding: 0 0;
  display: none;
  overflow: hidden;
  background-color: #f1f1f1;
}

.bslist {
    min-width: 15em;
}
/*
.content {
  padding: 0 18px;
  background-color: white;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.2s ease-out;
}
*/