diff --git a/frontend/src/env.ts b/frontend/src/env.ts
index a413ed4..1adc581 100644
--- a/frontend/src/env.ts
+++ b/frontend/src/env.ts
@@ -4,5 +4,7 @@
  * At build time (dev / CI), values come from import.meta.env.
  */
 export function env(key: string): string | undefined {
-  return (window as Record<string, any>).__env__?.[key] ?? (import.meta.env as Record<string, any>)[key]
+  const runtime = (window as Record<string, any>).__env__?.[key]
+  if (runtime) return runtime
+  return (import.meta as any).env?.[key]
 }