diff --git a/theme-arc-blue.css b/theme-arc-blue.css
index b3545ba..eb7d250 100644
--- a/theme-arc-blue.css
+++ b/theme-arc-blue.css
@@ -1039,12 +1039,12 @@
   }
   .repository .diff-file-box .code-diff-split tbody tr td.add-code,
   .repository .diff-file-box .code-diff-split tbody tr.add-code td:nth-child(4),
-  .repository .dif
+  .repository .dif {
       background-color: #243c24 !important;
   }
   .repository .diff-file-box .code-diff-split tbody tr td.del-code,
   .repository .diff-file-box .code-diff-split tbody tr.del-code td:nth-child(1),
-  .repository .dif
+  .repository .dif {
       background-color: #332020 !important;
   }
   .repository.view.issue .comment-list .comment .content > .merge-section {