diff --git a/app/static/erp-shell.css b/app/static/erp-shell.css
index 5514d26..8a5d3b8 100644
--- a/app/static/erp-shell.css
+++ b/app/static/erp-shell.css
@@ -285,7 +285,9 @@ body.erp-app-body { background: var(--color-canvas-white); height: 100vh; overfl
 
 /* ── 반응형 ── */
 @media (max-width: 900px) {
-  .erp-app { grid-template-columns: 0 1fr; }
+  /* 데스크탑 접힘(:has collapsed) 규칙보다 특이도 맞춰 모바일에서 사이드바 칸 0 강제 */
+  .erp-app,
+  .erp-app:has(.erp-sidebar[data-collapsed="true"]) { grid-template-columns: 0 1fr; }
   .erp-sidebar {
     position: fixed; left: 0; top: 0; height: 100vh;
     width: var(--erp-sidebar-w);
diff --git a/app/templates/erp_base.html b/app/templates/erp_base.html
index 18f1f8a..ec69a5a 100644
--- a/app/templates/erp_base.html
+++ b/app/templates/erp_base.html
@@ -4,8 +4,8 @@
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1" />
     <title>{{ page_title or "ERP" }} — DBX Corporation</title>
-    <link rel="stylesheet" href="/static/erp.css?v=20260530q" />
-    <link rel="stylesheet" href="/static/erp-shell.css?v=20260530q" />
+    <link rel="stylesheet" href="/static/erp.css?v=20260615a" />
+    <link rel="stylesheet" href="/static/erp-shell.css?v=20260615a" />
     <link rel="stylesheet" href="/static/erp-attach-viewer.css" />
     {% block head_extra %}{% endblock %}
   </head>