diff --git a/css/app.css b/css/app.css
index 98a0342df..96803f055 100644
--- a/css/app.css
+++ b/css/app.css
@@ -1969,8 +1969,10 @@ img.wiki-image {
 .shaded {
     z-index: 2;
     position: absolute;
-    height: 100%;
-    width: 100%;
+    top: 0;
+    bottom: 0;
+    left: 0;
+    right: 0;
     overflow: auto;
 }