diff --git a/lib/gollum/public/gollum/stylesheets/editor.scss b/lib/gollum/public/gollum/stylesheets/editor.scss
index af167e00..881b58d4 100644
--- a/lib/gollum/public/gollum/stylesheets/editor.scss
+++ b/lib/gollum/public/gollum/stylesheets/editor.scss
@@ -397,6 +397,20 @@ a#function-search { @include editor-button(16); }
   }
 }
 
+#gollum-editor-body-ace {
+  &.dragging {
+    box-shadow: 0 0 10px #AAE000;
+  }
+
+  &.uploading {
+    opacity: 0.5;
+
+    & + div {
+      display: block;
+    }
+  }
+}
+
 /* @section help */
 #gollum-editor-help {
   clear: both;
@@ -502,4 +516,4 @@ a#function-search { @include editor-button(16); }
     margin: 0 0 1em 0;
     padding: 0;
   }
-}
\ No newline at end of file
+}