add , adds wrapper element around background images/videos/iframes

1 files changed, 7 insertions, 2 deletions

diff --git a/css/reveal.css b/css/reveal.css
index 05c2e8d..ac095f4 100644
--- a/css/reveal.css
+++ b/css/reveal.css
@@ -1015,10 +1015,15 @@ body {
   visibility: hidden;
   overflow: hidden;
   background-color: transparent;
+  transition: all 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985); }
+
+.reveal .slide-background-content {
+  position: absolute;
+  width: 100%;
+  height: 100%;
   background-position: 50% 50%;
   background-repeat: no-repeat;
-  background-size: cover;
-  transition: all 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985); }
+  background-size: cover; }
 
 .reveal .slide-background.stack {
   display: block; }