diff --git a/_src/blocks/features/features.css b/_src/blocks/features/features.css
new file mode 100644
index 000000000..befa9489c
--- /dev/null
+++ b/_src/blocks/features/features.css
@@ -0,0 +1 @@
+/* features.css file */
diff --git a/_src/blocks/tabs/tabs.css b/_src/blocks/tabs/tabs.css
new file mode 100644
index 000000000..b9298cc8a
--- /dev/null
+++ b/_src/blocks/tabs/tabs.css
@@ -0,0 +1 @@
+/* Tab presentation is provided by the bd-tabs custom element. */