diff --git a/single-bluesky_wiki.php b/single-bluesky_wiki.php
new file mode 100644
index 0000000..1653e65
--- /dev/null
+++ b/single-bluesky_wiki.php
@@ -0,0 +1,176 @@
+<?php
+/**
+ * Single Wiki Article
+ */
+get_header();
+bluesky_navbar('wiki');
+$header_bg = bluesky_get_image('bluesky_header_bg_url', 'images/header-background.jpg');
+
+the_post();
+$cats = get_the_terms(get_the_ID(), 'wiki_category');
+$breadcrumb = [];
+if ($cats && !is_wp_error($cats)) {
+    $cat = $cats[0];
+    if ($cat->parent) {
+        $parent = get_term($cat->parent, 'wiki_category');
+        if ($parent && !is_wp_error($parent))
+            $breadcrumb[] = ['label' => $parent->name, 'url' => get_term_link($parent)];
+    }
+    $breadcrumb[] = ['label' => $cat->name, 'url' => get_term_link($cat)];
+}
+
+// Sidebar: alle Kategorien & Artikel
+$all_top_cats = get_terms(['taxonomy'=>'wiki_category','hide_empty'=>true,'parent'=>0,'orderby'=>'menu_order']);
+$current_cat_ids = wp_list_pluck($cats ?: [], 'term_id');
+$current_post_id = get_the_ID();
+?>
+
+<!-- PAGE HEADER -->
+<section id="page-header" style="background-image: url('<?php echo esc_url($header_bg); ?>')">
+    <div class="content">
+        <nav class="wiki-breadcrumb">
+            <a href="<?php echo home_url('/wiki/'); ?>">Wiki</a>
+            <?php foreach ($breadcrumb as $crumb): ?>
+            <span class="sep">›</span>
+            <a href="<?php echo esc_url($crumb['url']); ?>"><?php echo esc_html($crumb['label']); ?></a>
+            <?php endforeach; ?>
+            <span class="sep">›</span>
+            <span class="current"><?php the_title(); ?></span>
+        </nav>
+        <h1 class="title"><span><?php the_title(); ?></span></h1>
+    </div>
+</section>
+
+<!-- ARTIKEL -->
+<section id="wiki-article">
+    <div class="content" style="padding-top:50px;padding-bottom:80px">
+        <div class="wiki-article-layout">
+
+            <!-- SIDEBAR -->
+            <aside class="wiki-sidebar">
+                <div class="wiki-sidebar-inner">
+                    <h4 class="wiki-sidebar-title">📚 Navigation</h4>
+                    <?php if (!empty($all_top_cats) && !is_wp_error($all_top_cats)):
+                        foreach ($all_top_cats as $top_cat):
+                            $sub_cats = get_terms(['taxonomy'=>'wiki_category','hide_empty'=>true,'parent'=>$top_cat->term_id]);
+                            $top_articles = new WP_Query([
+                                'post_type'=>'bluesky_wiki','posts_per_page'=>-1,'post_status'=>'publish',
+                                'orderby'=>'title','order'=>'ASC',
+                                'tax_query'=>[['taxonomy'=>'wiki_category','field'=>'term_id','terms'=>$top_cat->term_id,'include_children'=>false]],
+                            ]);
+                            $is_open = in_array($top_cat->term_id, $current_cat_ids);
+                            // Auch öffnen wenn ein Kind-Element aktiv ist
+                            if (!$is_open && !empty($sub_cats) && !is_wp_error($sub_cats)) {
+                                foreach ($sub_cats as $sub) {
+                                    if (in_array($sub->term_id, $current_cat_ids)) { $is_open = true; break; }
+                                }
+                            }
+                    ?>
+                    <div class="wiki-nav-cat <?php echo $is_open ? 'open' : ''; ?>">
+                        <div class="wiki-nav-cat-header">
+                            <span><?php echo esc_html($top_cat->name); ?></span>
+                            <span class="wiki-nav-toggle">▾</span>
+                        </div>
+                        <div class="wiki-nav-cat-body">
+                            <?php if ($top_articles->have_posts()):
+                                while ($top_articles->have_posts()): $top_articles->the_post(); ?>
+                            <a href="<?php the_permalink(); ?>"
+                               class="wiki-nav-link <?php echo get_the_ID() === $current_post_id ? 'active' : ''; ?>">
+                                <?php the_title(); ?>
+                            </a>
+                            <?php endwhile; wp_reset_postdata(); endif; ?>
+
+                            <?php if (!empty($sub_cats) && !is_wp_error($sub_cats)):
+                                foreach ($sub_cats as $sub):
+                                    $sub_articles = new WP_Query([
+                                        'post_type'=>'bluesky_wiki','posts_per_page'=>-1,'post_status'=>'publish',
+                                        'orderby'=>'title','order'=>'ASC',
+                                        'tax_query'=>[['taxonomy'=>'wiki_category','field'=>'term_id','terms'=>$sub->term_id,'include_children'=>false]],
+                                    ]);
+                                    if (!$sub_articles->have_posts()) { wp_reset_postdata(); continue; }
+                            ?>
+                            <div class="wiki-nav-subcat">
+                                <span class="wiki-nav-subcat-label"><?php echo esc_html($sub->name); ?></span>
+                                <?php while ($sub_articles->have_posts()): $sub_articles->the_post(); ?>
+                                <a href="<?php the_permalink(); ?>"
+                                   class="wiki-nav-link wiki-nav-link-sub <?php echo get_the_ID() === $current_post_id ? 'active' : ''; ?>">
+                                    <?php the_title(); ?>
+                                </a>
+                                <?php endwhile; wp_reset_postdata(); ?>
+                            </div>
+                            <?php endforeach; endif; ?>
+                        </div>
+                    </div>
+                    <?php endforeach; endif; ?>
+                </div>
+            </aside>
+
+            <!-- ARTIKEL CONTENT -->
+            <article class="wiki-article-content">
+
+                <!-- Header -->
+                <div class="wiki-article-header">
+                    <nav class="wiki-breadcrumb" style="margin-bottom:8px">
+                        <a href="<?php echo home_url('/wiki/'); ?>">Wiki</a>
+                        <?php foreach ($breadcrumb as $crumb): ?>
+                        <span class="sep">›</span>
+                        <a href="<?php echo esc_url($crumb['url']); ?>"><?php echo esc_html($crumb['label']); ?></a>
+                        <?php endforeach; ?>
+                    </nav>
+                    <h1><?php the_title(); ?></h1>
+                </div>
+
+                <?php if (has_post_thumbnail()): ?>
+                <div class="wiki-article-hero">
+                    <?php the_post_thumbnail('large', ['class'=>'wiki-hero-img']); ?>
+                </div>
+                <?php endif; ?>
+
+                <!-- Body -->
+                <section class="wiki-answer-accordion" data-wiki-answer>
+                    <button
+                        type="button"
+                        class="wiki-answer-toggle"
+                        aria-expanded="false"
+                        aria-controls="wiki-answer-content-<?php echo esc_attr($current_post_id); ?>"
+                    >
+                        <span class="wiki-answer-toggle-label">Antwort</span>
+                        <span class="wiki-answer-toggle-hint">Zum Anzeigen aufklappen</span>
+                        <span class="wiki-answer-toggle-icon" aria-hidden="true"></span>
+                    </button>
+                    <div class="wiki-answer-panel" id="wiki-answer-content-<?php echo esc_attr($current_post_id); ?>">
+                        <div class="wiki-article-body">
+                            <?php the_content(); ?>
+                        </div>
+                    </div>
+                </section>
+
+                <!-- Vor/Zurück -->
+                <?php
+                $prev = get_previous_post(true, '', 'wiki_category');
+                $next = get_next_post(true, '', 'wiki_category');
+                if ($prev || $next):
+                ?>
+                <div class="wiki-article-nav">
+                    <?php if ($prev): ?>
+                    <a href="<?php echo get_permalink($prev); ?>" class="wiki-nav-prev">
+                        <span class="label">← Vorheriger Artikel</span>
+                        <span class="title"><?php echo esc_html(get_the_title($prev)); ?></span>
+                    </a>
+                    <?php else: ?><div></div><?php endif; ?>
+                    <?php if ($next): ?>
+                    <a href="<?php echo get_permalink($next); ?>" class="wiki-nav-next">
+                        <span class="label">Nächster Artikel →</span>
+                        <span class="title"><?php echo esc_html(get_the_title($next)); ?></span>
+                    </a>
+                    <?php endif; ?>
+                </div>
+                <?php endif; ?>
+
+            </article>
+        </div>
+    </div>
+</section>
+
+<?php bluesky_footer(); ?>
+<?php get_footer(); ?>