diff --git a/www/code/inner.html b/www/code/inner.html
index 0ef693f1c..f27544238 100644
--- a/www/code/inner.html
+++ b/www/code/inner.html
@@ -86,6 +86,13 @@
max-width: 40vw;
margin: auto;
}
+ #preview table tr td, #preview table tr th {
+ border: 1px solid black;
+ padding: 15px;
+ }
+ #preview table tr th {
+ border: 3px solid black;
+ }