diff --git a/js/admin_tabs.js b/js/admin_tabs.js
new file mode 100644
index 0000000..77444a0
--- /dev/null
+++ b/js/admin_tabs.js
@@ -0,0 +1,121 @@
+(function () {
+  'use strict';
+
+  function initBratonienTabs() {
+    var admin = document.querySelector('.bratonien-admin');
+    if (!admin) return;
+
+    var definitions = [
+      { id: 'uebersicht', label: 'Übersicht' },
+      { id: 'wasserzeichen', label: 'Wasserzeichen' },
+      { id: 'regeln', label: 'Albumregeln' },
+      { id: 'auswahl-download', label: 'Fotoauswahl & Downloads' },
+      { id: 'bilddateien', label: 'Bilddateien & Pfade' },
+      { id: 'wartung', label: 'Wartung / Cache' }
+    ];
+
+    var panels = [];
+    definitions.forEach(function (definition) {
+      var panel = document.getElementById(definition.id);
+      if (!panel) return;
+
+      if (panel.parentNode !== admin) {
+        admin.appendChild(panel);
+      }
+
+      panel.classList.add('bratonien-tab-panel');
+      panel.setAttribute('role', 'tabpanel');
+      panel.setAttribute('aria-labelledby', 'bratonien-tab-' + definition.id);
+      panels.push({ definition: definition, panel: panel });
+    });
+
+    if (!panels.length) return;
+
+    var oldNav = admin.querySelector('.bratonien-nav');
+    if (oldNav) oldNav.hidden = true;
+
+    var tabs = document.createElement('div');
+    tabs.className = 'bratonien-tabs';
+    tabs.setAttribute('role', 'tablist');
+    tabs.setAttribute('aria-label', 'Bratonien Tools Bereiche');
+
+    panels.forEach(function (item) {
+      var button = document.createElement('button');
+      button.type = 'button';
+      button.id = 'bratonien-tab-' + item.definition.id;
+      button.className = 'bratonien-tab';
+      button.setAttribute('role', 'tab');
+      button.setAttribute('aria-controls', item.definition.id);
+      button.setAttribute('aria-selected', 'false');
+      button.dataset.tab = item.definition.id;
+      button.textContent = item.definition.label;
+      tabs.appendChild(button);
+    });
+
+    admin.insertBefore(tabs, admin.firstChild);
+
+    function activate(id, remember) {
+      var found = false;
+
+      panels.forEach(function (item) {
+        var active = item.definition.id === id;
+        item.panel.hidden = !active;
+        var button = tabs.querySelector('[data-tab="' + item.definition.id + '"]');
+        if (button) {
+          button.classList.toggle('is-active', active);
+          button.setAttribute('aria-selected', active ? 'true' : 'false');
+          button.tabIndex = active ? 0 : -1;
+        }
+        if (active) found = true;
+      });
+
+      if (!found) {
+        activate(panels[0].definition.id, remember);
+        return;
+      }
+
+      if (remember !== false) {
+        try { window.localStorage.setItem('bratonien-tools-active-tab', id); } catch (e) {}
+      }
+    }
+
+    tabs.addEventListener('click', function (event) {
+      var button = event.target.closest('.bratonien-tab');
+      if (!button) return;
+      activate(button.dataset.tab);
+    });
+
+    tabs.addEventListener('keydown', function (event) {
+      if (event.key !== 'ArrowLeft' && event.key !== 'ArrowRight') return;
+      var buttons = Array.prototype.slice.call(tabs.querySelectorAll('.bratonien-tab'));
+      var current = buttons.indexOf(document.activeElement);
+      if (current < 0) return;
+      event.preventDefault();
+      var next = event.key === 'ArrowRight' ? current + 1 : current - 1;
+      if (next >= buttons.length) next = 0;
+      if (next < 0) next = buttons.length - 1;
+      buttons[next].focus();
+      activate(buttons[next].dataset.tab);
+    });
+
+    var initial = '';
+    if (window.location.hash) {
+      var hashId = window.location.hash.substring(1);
+      if (panels.some(function (item) { return item.definition.id === hashId; })) initial = hashId;
+    }
+    if (!initial) {
+      try { initial = window.localStorage.getItem('bratonien-tools-active-tab') || ''; } catch (e) {}
+    }
+    if (!panels.some(function (item) { return item.definition.id === initial; })) {
+      initial = panels[0].definition.id;
+    }
+
+    activate(initial, false);
+  }
+
+  if (document.readyState === 'loading') {
+    document.addEventListener('DOMContentLoaded', initBratonienTabs);
+  } else {
+    initBratonienTabs();
+  }
+})();