diff --git a/apps/layout/src/main/resources/app/view/tlTopov/tlTopov.css b/apps/layout/src/main/resources/app/view/tlTopov/tlTopov.css
new file mode 100644
index 0000000..8aa18f6
--- /dev/null
+++ b/apps/layout/src/main/resources/app/view/tlTopov/tlTopov.css
@@ -0,0 +1,2 @@
+/* css for layout topology overlay  */
+