ohif-viewer/LesionTracker/client/components/viewer.styl

#viewer
  width: 100%
  height: 100%
  margin: 0
  padding: 0
  background-color: black

#viewportAndLesionTable
  height: 100%
  width: 99%
  float: right
  -o-transition: all 0.3s ease-out;
  -ms-transition: all 0.3s ease-out;
  -moz-transition: all 0.3s ease-out;
  -webkit-transition: all 0.3s ease-out;
  transition: all 0.3s ease-out;

#imageViewerViewports
  .viewportContainer
    &.active
      border: 2px solid #777

    &:hover, &:hover.active
      border: 2px solid white

#btnCollapse
  background-color: #333
  border-color: black

  &.active
    border-color: #333

.btnCollapseIcon
  color: white