Add "top-down approach" in suggestion

Author: cjyuan

Wireframe/style.css

@@ -1,8 +1,8 @@
 /*
-  (Suggestion) Apply CSS in this order:
-  1. Lay out the top-level elements: <header>, <main>, <footer>.
-  2. Lay out the articles within <main>.
-  3. Style individual elements.
+  (Suggestion) Use a top-down approach when applying CSS:
+  1. Lay out the top-level elements: <header>, <main>, <footer>
+  2. Lay out the articles within <main>
+  3. Style individual elements
 
   Please REMOVE this comment before submitting your work.
 */