diff --git a/internal/web/static/app.css b/internal/web/static/app.css
index a23f887..def498e 100644
--- a/internal/web/static/app.css
+++ b/internal/web/static/app.css
@@ -299,6 +299,8 @@ html[data-wrap] .float { overflow-x: hidden; }
 .codebody { padding: 0 18px; white-space: pre; }
 /* #167: each logical line is its own block so offsetTop identifies its first visual row */
 .codeline { display: block; }
+/* #167 rev: gutter number spans must stack one per visual row (wrap on) */
+.code .gutter .gutline { display: block; }
 /* syntax highlight tokens (#1) */
 .tok-kw { color: #c792ea; }
 .tok-str { color: #a5e075; }