Add gradient to red banner.

css/main.css

@@ -114,7 +114,15 @@ a.media-subheading:hover {
 }
 
 .site .banner {
-  background-color: #a00;
+  /* Gradient generated using http://www.colorzilla.com/gradient-editor/ */
+  background: #aa0000; /* Old browsers */
+  background: -moz-linear-gradient(top, #aa0000 0%, #4f0000 100%); /* FF3.6+ */
+  background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#aa0000), color-stop(100%,#4f0000)); /* Chrome,Safari4+ */
+  background: -webkit-linear-gradient(top, #aa0000 0%,#4f0000 100%); /* Chrome10+,Safari5.1+ */
+  background: -o-linear-gradient(top, #aa0000 0%,#4f0000 100%); /* Opera 11.10+ */
+  background: -ms-linear-gradient(top, #aa0000 0%,#4f0000 100%); /* IE10+ */
+  background: linear-gradient(to bottom, #aa0000 0%,#4f0000 100%); /* W3C */
+  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#aa0000', endColorstr='#4f0000',GradientType=0 ); /* IE6-9 */
   color: white;
 }