GenomeDB/mydata/themes/hardwood/build/scss/_collapse.scss

.collapsed > .fieldset-wrapper {
  display: none;
}

fieldset.collapsible {
  legend {
    position: relative;
    padding-right: 2rem;
    &:before {
      font-family: FontAwesome;
      position: absolute;
      content: '\f0d7'; // Left caret
      color: theme-color(primary);
      right: 1rem;
    }
  }

  &.collapsed {
    legend:before {
      content: '\f0d9'; // Down caret
    }
  }
}

.tripal-toc-pane {
  @extend .nav;
  @extend .nav-pills;
  @extend .flex-column;
  .tripal_toc_list_item {
    @extend .nav-item;
    padding: 0 !important;
    border-radius: $border-radius;
    &:hover {
      background-color: #f7f7f7;
    }
  }
  .tripal_toc_list_item_link {
    @extend .nav-link;
    padding: .5rem .3rem;
    margin-top: 0 !important;
    &.active {
      background-color: #fff;
      font-weight: bold;
      color: #444;
    }
  }

  padding: 0;
}