ohif-viewer/extensions/dicom-rt/src/components/StructureSetItem/StructureSetItem.css

.dcmrt-structure-set-item .item-color-section {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

.dcmrt-structure-set-item .item-color {
  margin-top: 8px;
  border-radius: 100%;
  width: 20px;
  height: 20px;
}

.dcmrt-structure-set-item .item-info {
  display: inline-block;
  margin-top: 9px;
  padding-left: 9px;
  width: 90px;
  border-left: 1px solid var(--text-secondary-color);
  color: var(--text-primary-color);
  width: 100%;
}

.dcmrt-structure-set-item.selected .item-actions {
  height: 35px;
  visibility: visible;
}

.dcmrt-structure-set-item .item-actions {
  margin-left: -1px;
  background-color: var(--ui-gray-darker);
  height: 0;
  overflow: hidden;
  transition: all 0.3s ease;
  visibility: hidden;
  padding-left: 14px;
}

.dcmrt-structure-set-item .item-actions .btnAction {
  background-color: transparent;
  border: none;
  color: var(--default-color);
  cursor: pointer;
  line-height: 35px;
  height: 35px;
  transition: all 0.3s ease;
}

.dcmrt-structure-set-item .item-actions .btnAction:hover, .dcmrt-structure-set-item .item-actions .btnAction:active {
  color: var(--text-primary-color);
}

.dcmrt-structure-set-item .item-actions .btnAction i {
  margin-right: 4px;
}

.dcmrt-structure-set-item.selected .item-actions {
  height: 35px;
  visibility: visible;
}

.dcmrt-structure-set-item .item-label {
  display: flex;
  justify-content: space-between;
  padding-right: 10px;
}

.dcmrt-structure-set-item .item-label span {
  overflow-wrap: normal;
  white-space: nowrap;
  overflow: hidden;
  max-width: calc(100% - 40px); /* calc(100% - 50px); 20px = eye icon */
  text-overflow: ellipsis;
}

.dcmrt-structure-set-item .item-label .eye-icon {
  cursor: pointer;
  color: var(--active-color);
}

.dcmrt-structure-set-item .item-label .eye-icon:hover {
  color: var(--hover-color);
}

.dcmrt-structure-set-item .item-label .eye-icon.--visible {
  color: var(--default-color);
}