fix(config): use global styles for dynamically created elements

Astro scoped styles only apply to elements in the static HTML.
Host cards are created via JS (document.createElement) and don't
get the data-astro-* scope attribute. Changed to is:global.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: luizomf

src/pages/config.astro

@@ -71,7 +71,7 @@ import Footer from '../components/Footer.astro';
   <Footer />
 </Base>
 
-<style>
+<style is:global>
   .page-header {
     text-align: center;
     padding: 2rem 0 1.5rem;