new site

src/site/_includes/docs/getting-started/_class.html

 <section>
 <p>
 If you already know a class-based language,
 the syntax for creating and using classes probably looks familiar.
 If not,
 you might want to read up on
 <a target="_blank"
 href="http://www.google.com/url?sa=D&q=http%3A%2F%2Fen.wikipedia.org%2Fwiki%2FClass_(computer_programming)">classes</a>.
 </p>
 
@@ skipping 194 matching lines @@
   greet(<b>String</b> name) {
     print('$prefix $name');
   }
 }
 
 <b>void</b> main() {
   <b>Greeter</b> greeter = new Greeter();
   greeter.greet('types');
 } </pre>
 
-    <aside class="note">
-      <strong>Note:</strong>
-      You might have expected to see a <code>public</code> keyword
-      in the preceding code,
-      but there's no such thing in Dart.
-      Every type in Dart is public unless its name
-      starts with an underscore ("_").
-      For example, <code>Greeter</code> is public,
-      but <code>_Greeter</code> would be private.
+    <aside>
+      <div class="alert alert-info">
+        <strong>Tip:</strong>
+        You might have expected to see a <code>public</code> keyword
+        in the preceding code,
+        but there's no such thing in Dart.
+        Every type in Dart is public unless its name
+        starts with an underscore ("_").
+        For example, <code>Greeter</code> is public,
+        but <code>_Greeter</code> would be private.
+      </div>
     </aside>
   </dd>
 </dl>
 
 </section>
 </div>