diff --git a/lib/zin/wg/formgridpanel/css/v1.css b/lib/zin/wg/formgridpanel/css/v1.css
index 82f0cafa3a..a3ac37e493 100644
--- a/lib/zin/wg/formgridpanel/css/v1.css
+++ b/lib/zin/wg/formgridpanel/css/v1.css
@@ -1,3 +1,3 @@
-.size-sm {--zt-panel-form-max-width: 800px; --zt-panel-form-min-width: 590px;}
-.size-md {--zt-panel-form-max-width: 1000px; --zt-panel-form-min-width: 790px;}
-.size-lg {--zt-panel-form-max-width: 1200px; --zt-panel-form-min-width: 990px;}
+.page-form.size-sm {--zt-panel-form-max-width: 800px; --zt-panel-form-min-width: 590px;}
+.page-form.size-md {--zt-panel-form-max-width: 1000px; --zt-panel-form-min-width: 790px;}
+.page-form.size-lg {--zt-panel-form-max-width: 1200px; --zt-panel-form-min-width: 990px;}