Cascade Layers: New task

Author: estelle

learn/tasks/cascade/cascade.html

@@ -35,7 +35,7 @@
       </div>
     </section>
 
-    <textarea class="playable playable-css" style="height: 250px;">
+<textarea class="playable playable-css" style="height: 250px;">
 #outer div ul .nav a {
   background-color: blue;
   padding: 5px;