diff --git a/frontend/src/css/admin.css b/frontend/src/css/admin.css
index 2302519..8ebb990 100644
--- a/frontend/src/css/admin.css
+++ b/frontend/src/css/admin.css
@@ -38,13 +38,17 @@
   flex-direction: column;
   gap: 12px;
   min-width: 0;
+  width: 100%;
+  box-sizing: border-box;
+  overflow: hidden;
 }
 
 .form-grid {
   display: grid;
-  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
+  grid-template-columns: 1fr;
   gap: 12px;
   margin: 12px 0 8px;
+  width: 100%;
 }
 
 .form-grid.stacked {