diff --git a/astro.config.mjs b/astro.config.mjs
index bfae257..50ebe98 100644
--- a/astro.config.mjs
+++ b/astro.config.mjs
@@ -13,6 +13,13 @@ export default defineConfig({
   prefetch: { prefetchAll: true },
   server: { port: 4321, host: true },
   vite: {
+    build: {
+      // Lightning CSS (the default minifier) illegally folds animation-timeline
+      // INTO the `animation` shorthand (`animation: ... view()`), which browsers
+      // reject — silently killing every scroll-driven effect in production.
+      // esbuild minifies without property merging.
+      cssMinify: 'esbuild',
+    },
     server: {
       // Vite blocks unknown Host headers by default; the demo is viewed through an
       // ephemeral cloudflared quick tunnel, so allow any *.trycloudflare.com host.