diff --git a/public/content.css b/public/content.css
index f58ca305..ed635841 100644
--- a/public/content.css
+++ b/public/content.css
@@ -25,6 +25,18 @@
 	transition: transform 0.1s cubic-bezier(0, 0, 0.2, 1);
 }
 
+#shadowPreviewbar {
+	overflow: hidden;
+	padding: 0;
+	margin: 0;
+	position: absolute;
+	width: 100%;
+	height: 100%;
+	z-index: 1;
+	
+	transition: transform 0.1s cubic-bezier(0, 0, 0.2, 1);
+}
+
 .progress-bar-line > #previewbar {
 	height: 3px;
 }