feat: add responsive professional information layer

src/App.vue

@@ -1,10 +1,17 @@
 <script setup lang="ts">
 import AppShell from './components/AppShell.vue';
 import type { ProductionInputs } from './content/types';
+import './styles/tokens.css';
+import './styles/base.css';
+import './styles/layout.css';
+import './styles/components.css';
+import './styles/print.css';
 
 defineProps<{ inputs: Readonly<ProductionInputs> }>();
 </script>
 
 <template>
-  <AppShell :content="inputs.content" />
+  <div class="portfolio-shell">
+    <AppShell :content="inputs.content" />
+  </div>
 </template>