diff --git a/css/layout.scss b/css/layout.scss
index f499fdda..5d0536f9 100644
--- a/css/layout.scss
+++ b/css/layout.scss
@@ -25,6 +25,7 @@
 // Stack multiple elements on top of each other
 .reveal .r-stack {
 	display: grid;
+	grid-template-rows: 100%;
 }
 
 .reveal .r-stack > * {