hide body overflow

css/reveal.css

@@ -17,6 +17,7 @@ html {
 
 body {
   height: 100%;
+  overflow: hidden;
   position: relative;
   line-height: 1;
   margin: 0;

css/reveal.scss

@@ -21,6 +21,7 @@ html {
 
 body {
 	height: 100%;
+	overflow: hidden;
 	position: relative;
 	line-height: 1;
 	margin: 0;