Initial commit — Bar Pivoine cocktail recipe site

Hugo Extended site with 426 cocktail recipes from the open cocktail dataset.
Dark amber/gold editorial aesthetic, Tailwind CSS v4, Alpine.js client-side
search and filtering, HTMX page transitions, Docker + nginx production build.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

layouts/404.html

@@ -0,0 +1,10 @@
+{{ define "main" }}
+  <div class="min-h-[70vh] flex items-center justify-center text-center">
+    <div>
+      <div class="font-serif italic text-[120px] md:text-[200px] leading-none text-ink-faint/20 mb-4">404</div>
+      <h1 class="display text-[clamp(28px,4vw,48px)] mb-4">Glass not found.</h1>
+      <p class="text-ink-soft text-lg mb-8 max-w-md mx-auto">That cocktail seems to have slipped off the menu. Perhaps it was too good to last.</p>
+      <a href="/" class="btn btn-gold">Back to the bar</a>
+    </div>
+  </div>
+{{ end }}