Category description in sub-category boxes is truncated after height 6em, customizable with CSS

app/assets/javascripts/discourse/templates/components/categories-boxes.hbs

@@ -15,7 +15,7 @@
       </div>
 
       <div class='description'>
-        {{{c.description_excerpt}}}
+        {{{text-overflow class="overflow" text=c.description_excerpt}}}
       </div>
     </a>
   </div>

app/assets/stylesheets/desktop/category-list.scss

@@ -234,6 +234,11 @@
     text-align: center;
     font-size: 1.05em;
     color: dark-light-choose(scale-color($primary, $lightness: 50%), scale-color($secondary, $lightness: 40%));
+    .overflow {
+      max-height: 6em;
+      overflow: hidden;
+      text-overflow: ellipsis;
+    }
   }
 
   h3 {