diff --git a/css/impress-demo.css b/css/impress-demo.css
index 1248bf3..2cae5d0 100644
--- a/css/impress-demo.css
+++ b/css/impress-demo.css
@@ -97,6 +97,10 @@ a:hover {
     text-shadow: -1px -1px 2px rgba(100,100,100,0.5);
 }
 
+/* enable clicking on elements 'hiding' behind body in 3D */
+body     { pointer-events: none; }
+#impress { pointer-events: auto; }
+
 /* COMMON STEP STYLES */
 
 .step {