Display pre-processing message in container div

app/views/asciicasts/_player.html.erb

@@ -12,12 +12,14 @@
     <meta http-equiv="refresh" content="5">
   <% end %>
 
-  <div class="processing-info">
-    <p>
-      This recording is being pre-processed at the moment. It will open automatically in a few seconds.
-    </p>
-    <p>
-      Feel free to contact <a href="mailto:support@asciinema.org">support@asciinema.org</a> if it takes longer.
-    </p>
+  <div class="container">
+    <div class="processing-info">
+      <p>
+        This recording is being pre-processed at the moment. It will open automatically in a few seconds.
+      </p>
+      <p>
+        Feel free to contact <a href="mailto:support@asciinema.org">support@asciinema.org</a> if it takes longer.
+      </p>
+    </div>
   </div>
 <% end %>