diff --git a/p/themes/Flat/flat.css b/p/themes/Flat/flat.css
index 697c88000..701083bfa 100644
--- a/p/themes/Flat/flat.css
+++ b/p/themes/Flat/flat.css
@@ -978,11 +978,13 @@ th {
 		min-height: 0;
 	}
 
-	.nav_menu .stick {
+	.nav_menu .stick,
+	.nav_menu .group {
 		margin: 0 10px;
 	}
 
-	.nav_menu .stick .btn {
+	.nav_menu .stick .btn,
+	.nav_menu .group .btn {
 		margin: 5px 0;
 	}
 
diff --git a/p/themes/Flat/flat.rtl.css b/p/themes/Flat/flat.rtl.css
index 71af52517..26f4f2d60 100644
--- a/p/themes/Flat/flat.rtl.css
+++ b/p/themes/Flat/flat.rtl.css
@@ -978,11 +978,13 @@ th {
 		min-height: 0;
 	}
 
-	.nav_menu .stick {
+	.nav_menu .stick,
+	.nav_menu .group {
 		margin: 0 10px;
 	}
 
-	.nav_menu .stick .btn {
+	.nav_menu .stick .btn,
+	.nav_menu .group .btn {
 		margin: 5px 0;
 	}