diff --git a/src/css/style.less b/src/css/style.less
index 8d6f692f..a8e096b3 100644
--- a/src/css/style.less
+++ b/src/css/style.less
@@ -199,6 +199,11 @@ button {
     .block;
 }
 
+#slideTo, #slideBack {
+    // Force left & right pane height to 1px (prevent empty space before footer).
+    height: 1px;
+}
+
 /*
  * The main part of the app
  *