add refused-to-display tips in link-preview-overlay

1 files changed, 10 insertions, 0 deletions

diff --git a/css/reveal.scss b/css/reveal.scss
index f8d6904..c360fe6 100644
--- a/css/reveal.scss
+++ b/css/reveal.scss
@@ -1229,6 +1229,16 @@ html:-moz-full-screen-ancestor {
 		visibility: visible;
 	}
 
+	.reveal .overlay.overlay-preview.loaded .viewport-inner  {
+		position: absolute;
+		z-index: -1;
+		left: 0;
+		top: 60px;
+		width: 100%;
+		text-align: center;
+		letter-spacing: normal;
+	}
+
 	.reveal .overlay.overlay-preview.loaded .spinner {
 		opacity: 0;
 		visibility: hidden;