diff --git a/src/runtime/index.css b/src/runtime/index.css
index 9a763e36..d0d54fd7 100644
--- a/src/runtime/index.css
+++ b/src/runtime/index.css
@@ -1,4 +1,4 @@
-@theme {
+@theme default {
   --spacing-4_5: 1.125rem;
 }