kibana-123/src/ui/public/stringify/editors/duration.less

Kibana is an open source (Apache Licensed), browser based analytics and search dashboard for Elasticsearch. Kibana is a snap to setup and start using. Kibana strives to be easy to get started with, while also being flexible and powerful, just like Elastic

.editor-duration {
  display: flex;
  > .form-group {
    flex: 1 1 1%;
    padding-right: 5px;
    &:last-child {
      padding-right: 0;
    }
  }
}