.code_fold_it:hover {
  background-color: #a8a8a84f;
}
.code_fold_it_collapsed:hover {
  background-color: #a8a8a84f;
}
.example_data_fold_it:hover {
  background-color: #a8a8a84f;
}
.example_data_fold_it_collapsed:hover {
  background-color: #a8a8a84f;
}
.result_fold_it:hover {
  background-color: #a8a8a84f;
}
.result_fold_it_collapsed:hover {
  background-color: #a8a8a84f;
}

.arrow {
  border: solid black;
  border-width: 0 3px 3px 0;
  display: inline-block;
  padding: 3px;
}
.down {
  position:relative;
  top:-1px;
  transform: rotate(45deg);
  -webkit-transform: rotate(45deg);
}
.placeholder_txt {
  position:relative;
  top:-10px;
}