discourse/app/assets/stylesheets/common/select-kit/category-chooser.scss

.select-kit {
  &.combo-box {
    &.category-chooser {
      width: 300px;
      .select-kit-row {
        display: -webkit-box;
        display: -ms-flexbox;
        display: flex;
        -webkit-box-align: flex-start;
            -ms-flex-align: flex-start;
                align-items: flex-start;
        -webkit-box-orient: vertical;
        -webkit-box-direction: normal;
            -ms-flex-direction: column;
                flex-direction: column;

        &.none {
          .topic-count {
            display: none;
          }
        }

        .topic-count {
          font-size: $font-down-2;
          color: $primary;
          white-space: nowrap;
        }

        .category-status {
          color: $primary;
          line-height: $line-height-large;
          -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: #919191;
          font-size: $font-down-1;
          line-height: $line-height-large;
        }
      }
    }
  }
}