Put the styles in a separate styles.css

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

astro.config.mjs

@@ -2,9 +2,11 @@ import { defineConfig } from 'astro/config';
 
 export default defineConfig({
   // Relative asset URLs, so the site works wherever it is hosted, e.g. https://berlin.ccc.de/kik/
-  build: { format: 'file', assetsPrefix: '.' },
+  build: { format: 'file', assetsPrefix: '.', inlineStylesheets: 'never' },
   compressHTML: false,
   vite: {
+    // The pages' styles, which Astro bundles while building the pages
+    build: { rolldownOptions: { output: { assetFileNames: 'styles.css' } } },
     environments: {
       client: {
         build: {