diff --git a/src/views/reader.html.ecr b/src/views/reader.html.ecr
index 86f4f4b..6826923 100644
--- a/src/views/reader.html.ecr
+++ b/src/views/reader.html.ecr
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html style="background-color: black;">
+<html class="reader-bg">
 
   <% page = "Reader" %>
   <%= render_component "head" %>
@@ -112,6 +112,7 @@
   <style>
 img[data-src][src*='data:image'] { background: white; }
 img { width: 100%; }
+.reader-bg { background: black; }
   </style>
 
 </html>
