citywebshop_cms/static/trumbowyg/plugins/highlight/ui/sass/trumbowyg.highlight.scss

.trumbowyg-highlight-form-group {
  margin: 15px 10px;

  .trumbowyg-highlight-form-control {
    width: 100%;
    border: 1px solid #DEDEDE;
    font-size: 14px;
    padding: 7px;

    &.code {
      height: 200px;
    }
  }
}