fix(website): add is:inline to prevent Astro style scoping on landing page

Author: pbertsch

website/src/pages/index.astro

@@ -15,7 +15,7 @@
   <link rel="preconnect" href="https://fonts.googleapis.com" />
   <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
   <link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap" rel="stylesheet" />
-  <style>
+  <style is:inline>
     * { margin: 0; padding: 0; box-sizing: border-box; }
     :root {
       --bg: #06080d;
@@ -395,7 +395,7 @@
   <!-- Nav -->
   <nav>
     <a href="/" class="nav-logo">
-      <svg viewBox="0 0 28 28" fill="none"><rect x="2" y="2" width="24" height="24" rx="6" stroke="#3bf0e4" stroke-width="2"/><path d="M9 14l3 3 7-7" stroke="#3bf0e4" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"/></svg>
+      <svg viewBox="0 0 28 28" width="28" height="28" fill="none"><rect x="2" y="2" width="24" height="24" rx="6" stroke="#3bf0e4" stroke-width="2"/><path d="M9 14l3 3 7-7" stroke="#3bf0e4" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"/></svg>
       FlutterProbe
     </a>
     <div class="nav-r">