diff --git a/files/main.css b/files/main.css
index f269254144e69c084508b8dd9c90f03ba9614461..0b4d09ae3ccf95d14c7ad596db3676ce6374bb62 100644
--- a/files/main.css
+++ b/files/main.css
@@ -385,6 +385,10 @@ iframe {
 	overflow: auto;
 }
 
+iframe#viewer {
+	display: none;
+}
+
 #viewer {
 	padding-left: var(--panel-width);
 }