diff --git a/www/code/code.less b/www/code/code.less
index 50026d340..ce7c7898e 100644
--- a/www/code/code.less
+++ b/www/code/code.less
@@ -72,7 +72,7 @@ body {
 
 #preview {
     max-width: 40vw;
-    margin: auto;
+    margin: 1em auto;
 
     .markdown_preformatted-code;
     .markdown_gfm-table(black);