message: Add styles for subclass path indicator.
diff: padding-top: 0;
  }
  + .item-drag-container {
  + // subclass path indicator
  + .item::before {
  + content: '';
  + position: absolute;
  + width: calc(var(--item-size) * 0.2);
  + height: calc(var(--item-size) * 0.2);
  + left: calc(var(--item-size) * 0.4);
  + top: 1px;
  + transform: rotate(45deg) scale(0.78);
  + box-sizing: border-box;
  + background: #ddd;
  + }
  +
  + // icon outline
  + .item::after {
  + outline: 2px solid #ddd;
  + content: '';
  + position: absolute;
  + width: var(--item-size);
  + height: var(--item-size);
  + left: 0;
  + top: 0;
  + transform: rotate(45deg) scale(0.67);
  + box-sizing: border-box;
  + }
  +
  // don't display the default outline when hovering over a draggable subclass item
  - .item-drag-container:hover {
  + &:hover {
  outline: none;
  // allow the pseudo-element to render outside the bounds of the item
  position: absolute;
  width: var(--item-size);
  height: var(--item-size);
  - transform: rotate(45deg) scale(0.75);
  + transform: rotate(45deg) scale(0.78);
  box-sizing: border-box;
  }
  }
  }
  + }
  // Postmaster - items above, collect button below
  .bucket-215593132 & {
  