fix: use language-specific 404 layouts for proper i18n support

Created separate 404.html layouts in themes/danix-xyz-hacker/layouts/it/ and
themes/danix-xyz-hacker/layouts/en/ with hardcoded language-specific links.
Hugo automatically routes language requests to the correct layout, enabling
proper i18n context and translations. Removed generic 404.html and all
JavaScript detection hacks.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

5 files changed, 165 insertions, 32 deletions

diff --git a/content/en/404.md b/content/en/404.md
new file mode 100644
index 0000000..ce95b59
--- /dev/null
+++ b/content/en/404.md
@@ -0,0 +1,5 @@
+---
+title: "404"
+outputs:
+  - html
+---
diff --git a/content/it/404.md b/content/it/404.md
new file mode 100644
index 0000000..ce95b59
--- /dev/null
+++ b/content/it/404.md
@@ -0,0 +1,5 @@
+---
+title: "404"
+outputs:
+  - html
+---
diff --git a/themes/danix-xyz-hacker/assets/js/not-found-page.js b/themes/danix-xyz-hacker/assets/js/not-found-page.js
index cec60bd..e86af02 100644
--- a/themes/danix-xyz-hacker/assets/js/not-found-page.js
+++ b/themes/danix-xyz-hacker/assets/js/not-found-page.js
@@ -31,29 +31,6 @@ document.addEventListener('alpine:init', () => {
     }
   }));
 
-  Alpine.data('notFoundNav', () => {
-    const isItalian = window.location.pathname.startsWith('/it/');
-    return {
-      get homeLink() {
-        return isItalian ? '/it/' : '/';
-      },
-      get articlesLink() {
-        return isItalian ? '/it/articles/' : '/articles/';
-      },
-      get contactLink() {
-        return isItalian ? '/it/is/here/' : '/is/here/';
-      },
-      goHome() {
-        window.location.href = this.homeLink;
-      },
-      goArticles() {
-        window.location.href = this.articlesLink;
-      },
-      goContact() {
-        window.location.href = this.contactLink;
-      }
-    };
-  });
 
   console.log('notFoundPage Alpine component registered');
 });
diff --git a/themes/danix-xyz-hacker/layouts/404.html b/themes/danix-xyz-hacker/layouts/en/404.html
index 341f90b..6ed4892 100644
--- a/themes/danix-xyz-hacker/layouts/404.html
+++ b/themes/danix-xyz-hacker/layouts/en/404.html
@@ -1,10 +1,5 @@
 {{ define "main" }}
 
-<!-- Detect language from current URL -->
-<script>
-window.currentLang = window.location.pathname.startsWith('/it/') ? 'it' : 'en';
-</script>
-
 <!-- Pass articles data to JavaScript for Alpine.js -->
 <script>
 window.articlesData = [
@@ -81,14 +76,14 @@ window.articlesData = [
     </div>
 
     <!-- Navigation Links -->
-    <div class="space-y-4 flex flex-col items-center mb-12" x-data="notFoundNav()">
-      <a :href="homeLink" @click.prevent="goHome()" class="btn btn-primary">
+    <div class="space-y-4 flex flex-col items-center mb-12">
+      <a href="/" class="btn btn-primary">
         {{ i18n "goHome" }}
       </a>
-      <a :href="articlesLink" @click.prevent="goArticles()" class="btn btn-secondary">
+      <a href="/articles/" class="btn btn-secondary">
         {{ i18n "browseArticles" }}
       </a>
-      <a :href="contactLink" @click.prevent="goContact()" class="btn btn-outline">
+      <a href="/is/here/" class="btn btn-outline">
         {{ i18n "contactSupport" }}
       </a>
     </div>
diff --git a/themes/danix-xyz-hacker/layouts/it/404.html b/themes/danix-xyz-hacker/layouts/it/404.html
new file mode 100644
index 0000000..805b19a
--- /dev/null
+++ b/themes/danix-xyz-hacker/layouts/it/404.html
@@ -0,0 +1,151 @@
+{{ define "main" }}
+
+<!-- Pass articles data to JavaScript for Alpine.js -->
+<script>
+window.articlesData = [
+  {{ range (where .Site.RegularPages "Section" "articles") }}
+  {
+    title: '{{ .Title | safeJS }}',
+    url: '{{ .Permalink }}',
+    date: '{{ .Date.Format "Jan 02, 2006" }}',
+    content: '{{ (.Summary | plainify | safeJS) }}'
+  },
+  {{ end }}
+];
+</script>
+
+<main class="min-h-screen px-4 py-12">
+  <div class="mx-auto px-4 py-12 max-w-4xl border border-border glow-accent rounded-lg bg-bg p-8" x-data="notFoundPage()">
+    <div class="text-center">
+    <!-- 404 Heading -->
+    <h1 class="text-7xl md:text-8xl font-bold text-accent mb-4 animate-fade-in">
+      404
+    </h1>
+
+    <!-- Error Message -->
+    <h2 class="text-3xl md:text-4xl font-bold mb-6">
+      {{ i18n "notFound" }}
+    </h2>
+
+    <p class="text-lg text-text-dim mb-8">
+      {{ i18n "notFoundMessage" }}
+    </p>
+
+    <!-- Search Box -->
+    <div class="mb-12">
+      <form id="search-form" class="flex flex-col gap-4">
+        <label for="search-input" class="sr-only">{{ i18n "searchPlaceholder" }}</label>
+        <input
+          id="search-input"
+          type="text"
+          placeholder="{{ (i18n "searchPlaceholder") }}"
+          class="px-4 py-3 border-2 border-border rounded focus:outline-none focus:ring-2 focus:ring-accent focus:border-transparent bg-bg text-text"
+          @input="filterArticles($el.value)"
+        />
+      </form>
+      <div id="search-results" class="mt-4 text-left space-y-3" x-show="filteredArticles.length > 0">
+        <template x-for="article in filteredArticles" :key="article.title">
+          <div class="p-4 border-l-4 border-accent bg-bg/50 hover:bg-bg/70 transition-colors">
+            <a :href="article.url" class="block text-left">
+              <h4 class="font-bold text-accent hover:underline" x-text="article.title"></h4>
+              <p class="text-sm text-text-dim mt-1" x-text="article.date"></p>
+            </a>
+          </div>
+        </template>
+      </div>
+      <div x-show="searchQuery && filteredArticles.length === 0" class="mt-4 text-text-dim">
+        {{ i18n "noSearchResults" }}
+      </div>
+    </div>
+
+    <!-- Recent Articles Section -->
+    <div class="mb-12">
+      <h3 class="text-2xl font-bold mb-6">{{ i18n "recentArticles" }}</h3>
+      <div class="space-y-4">
+        {{ range first 5 (where .Site.RegularPages "Section" "articles") }}
+        <div class="p-4 border-l-4 border-accent bg-bg/50 hover:bg-bg/70 transition-colors">
+          <a href="{{ .Permalink }}" class="block text-left">
+            <h4 class="font-bold text-accent hover:underline">{{ .Title }}</h4>
+            <p class="text-sm text-text-dim mt-1">
+              {{ .Date.Format "Jan 02, 2006" }}
+            </p>
+          </a>
+        </div>
+        {{ end }}
+      </div>
+    </div>
+
+    <!-- Navigation Links -->
+    <div class="space-y-4 flex flex-col items-center mb-12">
+      <a href="/it/" class="btn btn-primary">
+        {{ i18n "goHome" }}
+      </a>
+      <a href="/it/articles/" class="btn btn-secondary">
+        {{ i18n "browseArticles" }}
+      </a>
+      <a href="/it/is/here/" class="btn btn-outline">
+        {{ i18n "contactSupport" }}
+      </a>
+    </div>
+
+    <!-- Easter Egg Trigger -->
+    <div class="mt-12 pt-8 border-t border-border">
+      <button
+        type="button"
+        @click="toggleEasterEgg()"
+        class="text-sm text-text-dim hover:text-accent transition-colors underline"
+      >
+        {{ i18n "followWhiteRabbit" }}
+      </button>
+    </div>
+
+      <!-- Easter Egg Modal (Hidden by default) -->
+      <div
+        class="fixed inset-0 z-50"
+        :class="{ 'flex items-center justify-center': showEasterEgg, 'hidden': !showEasterEgg }"
+        x-show="showEasterEgg"
+        x-cloak
+      >
+        <!-- Overlay -->
+        <div
+          class="absolute inset-0 bg-black/50"
+          @click="showEasterEgg = false"
+        ></div>
+
+        <!-- Modal Content -->
+        <div class="relative bg-bg border-2 border-accent p-8 rounded-lg shadow-xl max-w-md mx-4">
+          <h2 class="text-2xl font-bold mb-6 text-accent">{{ i18n "easterEggTitle" }}</h2>
+
+          <div class="space-y-4">
+            <button
+              type="button"
+              @click="showEasterEgg = false; window.location.href = '{{ .Site.BaseURL }}it/'"
+              class="w-full btn btn-primary"
+            >
+              💊 {{ i18n "bluePill" }}
+            </button>
+
+            <button
+              type="button"
+              @click="goToRandomArticle()"
+              class="w-full btn btn-secondary"
+            >
+              🐰 {{ i18n "redPill" }}
+            </button>
+          </div>
+
+          <button
+            type="button"
+            @click="showEasterEgg = false"
+            class="absolute top-4 right-4 text-text-dim hover:text-text dark:hover:text-text transition-colors"
+            aria-label="Close modal"
+          >
+            ✕
+          </button>
+        </div>
+      </div>
+    </div>
+  </div>
+</main>
+
+{{ end }}