discourse/app/assets/stylesheets/common/components/category-select-box.scss

.category-select-box {
  .select-box-row {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-direction: column;
            flex-direction: column;

    .topic-count {
      font-size: 11px;
      color: $primary;
    }

    .category-status {
      -webkit-box-flex: 0;
          -ms-flex: 1 1 auto;
              flex: 1 1 auto;
    }

    .category-desc {
      -webkit-box-flex: 0;
          -ms-flex: 1 1 auto;
              flex: 1 1 auto;
      color: $primary;
      font-size: 0.857em;
      line-height: 16px;
    }
  }
}