revert to display none from visibility hidden to correct vertical centering

diff --git a/css/reveal.css b/css/reveal.css
index c4c2991bd1ec1843703f9bbcf7cb2a0beb14263b..1b1bd08cb6780992a197dc41c87b2cc44bc29ca1 100644 (file)
--- a/css/reveal.css
+++ b/css/reveal.css
@@ -534,7 +534,7 @@ body {
 
 .reveal .slides>section,
 .reveal .slides>section>section {
-       visibility: hidden;
+       display: none;
        position: absolute;
        width: 100%;
 
@@ -566,7 +566,7 @@ body {
 
 .reveal .slides>section.present,
 .reveal .slides>section>section.present {
-       visibility: visible;
+       display: block;
        z-index: 11;
        opacity: 1;
 }