1 files changed, 41 insertions, 10 deletions

diff --git a/css/reveal.scss b/css/reveal.scss
index f6a37ad..ee3c440 100644
--- a/css/reveal.scss
+++ b/css/reveal.scss
@@ -3,7 +3,7 @@
  * http://lab.hakim.se/reveal-js
  * MIT licensed
  *
- * Copyright (C) 2016 Hakim El Hattab, http://hakim.se
+ * Copyright (C) 2017 Hakim El Hattab, http://hakim.se
  */
 
 
@@ -69,13 +69,13 @@ body {
 
 	&.visible {
 		opacity: 1;
-		visibility: visible;
+		visibility: inherit;
 	}
 }
 
 .reveal .slides section .fragment.grow {
 	opacity: 1;
-	visibility: visible;
+	visibility: inherit;
 
 	&.visible {
 		transform: scale( 1.3 );
@@ -84,7 +84,7 @@ body {
 
 .reveal .slides section .fragment.shrink {
 	opacity: 1;
-	visibility: visible;
+	visibility: inherit;
 
 	&.visible {
 		transform: scale( 0.7 );
@@ -101,7 +101,7 @@ body {
 
 .reveal .slides section .fragment.fade-out {
 	opacity: 1;
-	visibility: visible;
+	visibility: inherit;
 
 	&.visible {
 		opacity: 0;
@@ -111,17 +111,17 @@ body {
 
 .reveal .slides section .fragment.semi-fade-out {
 	opacity: 1;
-	visibility: visible;
+	visibility: inherit;
 
 	&.visible {
 		opacity: 0.5;
-		visibility: visible;
+		visibility: inherit;
 	}
 }
 
 .reveal .slides section .fragment.strike {
 	opacity: 1;
-	visibility: visible;
+	visibility: inherit;
 
 	&.visible {
 		text-decoration: line-through;
@@ -166,7 +166,7 @@ body {
 
 	&.current-fragment {
 		opacity: 1;
-		visibility: visible;
+		visibility: inherit;
 	}
 }
 
@@ -177,7 +177,7 @@ body {
 .reveal .slides section .fragment.highlight-blue,
 .reveal .slides section .fragment.highlight-current-blue {
 	opacity: 1;
-	visibility: visible;
+	visibility: inherit;
 }
 	.reveal .slides section .fragment.highlight-red.visible {
 		color: #ff2c2d
@@ -388,6 +388,7 @@ body {
 	bottom: 0;
 	left: 0;
 	margin: auto;
+	pointer-events: none;
 
 	overflow: visible;
 	z-index: 1;
@@ -406,6 +407,7 @@ body {
 	position: absolute;
 	width: 100%;
 	padding: 20px 0px;
+	pointer-events: auto;
 
 	z-index: 10;
 	transform-style: flat;
@@ -443,6 +445,11 @@ body {
 	opacity: 1;
 }
 
+.reveal .slides>section:empty,
+.reveal .slides>section>section:empty {
+	pointer-events: none;
+}
+
 .reveal.center,
 .reveal.center .slides,
 .reveal.center .slides section {
@@ -866,6 +873,7 @@ body {
 		height: 100%;
 		opacity: 0;
 		visibility: hidden;
+		overflow: hidden;
 
 		background-color: rgba( 0, 0, 0, 0 );
 		background-position: 50% 50%;
@@ -882,6 +890,7 @@ body {
 	.reveal .slide-background.present {
 		opacity: 1;
 		visibility: visible;
+		z-index: 2;
 	}
 
 	.print-pdf .reveal .slide-background {
@@ -898,7 +907,11 @@ body {
 	max-height: none;
 	top: 0;
 	left: 0;
+	object-fit: cover;
 }
+	.reveal .slide-background[data-background-size="contain"] video {
+		object-fit: contain;
+	}
 
 /* Immediate transition style */
 .reveal[data-background-transition=none]>.backgrounds .slide-background,
@@ -1195,6 +1208,7 @@ body {
 			display: inline-block;
 			width: 40px;
 			height: 40px;
+			line-height: 36px;
 			padding: 0 10px;
 			float: right;
 			opacity: 0.6;
@@ -1246,6 +1260,23 @@ body {
 		visibility: visible;
 	}
 
+	.reveal .overlay.overlay-preview.loaded .viewport-inner  {
+		position: absolute;
+		z-index: -1;
+		left: 0;
+		top: 45%;
+		width: 100%;
+		text-align: center;
+		letter-spacing: normal;
+	}
+	.reveal .overlay.overlay-preview .x-frame-error  {
+		opacity: 0;
+		transition: opacity 0.3s ease 0.3s;
+	}
+	.reveal .overlay.overlay-preview.loaded .x-frame-error  {
+		opacity: 1;
+	}
+
 	.reveal .overlay.overlay-preview.loaded .spinner {
 		opacity: 0;
 		visibility: hidden;