added css property for better link visibility (#496)

index.html

@@ -536,7 +536,7 @@ <h4>Recall</h4>
         <h3>Check out the remaining hundreds of activities!</h3>
 	<p>We have hundreds of activities to explore.</p>
         <a href="https://v4.activities.sugarlabs.org/"><button type="button" class="btn bt-raised btn-custom bt">Go to Sugar Activity Library</button></a><br><br>
-	<p><em>Important: Please know that in order to install and try them, you need to be running the Sugar Desktop Environment. If you don't have that already, please consider your other options</a> to explore Sugar: <a href="{{ site.baseurl }}/#try">Try Sugar!</a></em></p>
+	<p><em>Important: Please know that in order to install and try them, you need to be running the Sugar Desktop Environment. If you don't have that already, please consider your other options</a> to explore Sugar: <a class="footerHeaderStyle" href="{{ site.baseurl }}/#try">Try Sugar!</a></em></p>
       </div>
     </div>
   </div>