diff --git a/vite.config.ts b/vite.config.ts
index 8fcdef16..8034b963 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -15,11 +15,13 @@ export default defineConfig({
         }
     },
     optimizeDeps: {
-        // flowbite-svelte ships TypeScript optional-param syntax (x?, date?) in its compiled
-        // .svelte dist files. Esbuild's pre-bundler treats them as plain JS and rejects the `?`
-        // syntax. Excluding it here lets vite-plugin-svelte handle it properly instead.
-        // Re-evaluate if flowbite-svelte releases a clean JS dist (check when upgrading).
-        exclude: ['@codemirror/*', 'flowbite-svelte'],
+        // @codemirror/* uses dynamic imports that confuse esbuild's pre-bundler; excluded here
+        // so vite-plugin-svelte handles them through the normal transform pipeline instead.
+        // flowbite-svelte: ONLY exclude if you upgrade to a version that ships TypeScript
+        // optional-param syntax (x?, date?) in its compiled dist files — verify with grep
+        // before adding it back. Excluding it causes tailwindcss 4.3+ to receive raw .svelte
+        // file content (including TypeScript) for style virtual modules, which it rejects.
+        exclude: ['@codemirror/*'],
         include: []
     },
     ssr: {