diff --git a/internal/web/static/app.css b/internal/web/static/app.css
index c74693c..389c78f 100644
--- a/internal/web/static/app.css
+++ b/internal/web/static/app.css
@@ -440,8 +440,10 @@ td a.slug.paste-name { background: none; padding: 0; border-radius: 0; font-fami
 /* submenu number boxes (#157): styled number inputs + unit selects,
    padded + indented to line up with parent option labels */
 .submenu {
-  margin: 6px 0 4px 8px;
-  padding: 8px 10px;
+  /* #240: indent the box under the parent option LABEL text (8px row padding
+     + 16px control + 8px gap = 32px), and match the row control padding rhythm */
+  margin: 4px 0 4px 32px;
+  padding: 6px 10px;
   background: var(--bg);
   border: 1px solid var(--border);
   border-radius: var(--radius);