diff --git a/partials/structure/layout_start.php b/partials/structure/layout_start.php
index 579bff5..a9cc4b4 100755
--- a/partials/structure/layout_start.php
+++ b/partials/structure/layout_start.php
@@ -85,6 +85,7 @@ if ($currentModule) {
     </aside>
 
     <div class="app-content">
+      <button class="floating-toggle" data-sidebar-toggle aria-label="Menü einblenden">»»</button>
 
       <?php if ($moduleMenu): ?>
         <div class="module-subnav">
diff --git a/public/assets/css/app.css b/public/assets/css/app.css
index 82e4b6b..fb9a337 100644
--- a/public/assets/css/app.css
+++ b/public/assets/css/app.css
@@ -107,22 +107,41 @@ body {
 }
 .sidebar-collapse { display: none; }
 
+.floating-toggle {
+  display: none;
+  position: fixed;
+  left: 24px;
+  bottom: 24px;
+  width: 52px;
+  height: 52px;
+  border-radius: 50%;
+  background: var(--panel);
+  border: 1px solid var(--line);
+  box-shadow: var(--shadow);
+  align-items: center;
+  justify-content: center;
+  font-weight: 800;
+  z-index: 60;
+}
+
 .sidebar-collapsed .app-shell {
-  grid-template-columns: 72px 1fr;
+  grid-template-columns: 1fr;
 }
-.sidebar-collapsed .sidebar-toggle {
-  padding: 6px 8px;
-  font-size: 14px;
+.sidebar-collapsed .app-sidebar {
+  width: 0;
+  padding: 0;
+  border: none;
+  box-shadow: none;
+  background: transparent;
 }
-.sidebar-collapsed .sidebar-icon { display: none; }
-.sidebar-collapsed .sidebar-collapse { display: inline; }
-.sidebar-collapsed .app-sidebar .brand-text,
-.sidebar-collapsed .app-sidebar .nav-section,
-.sidebar-collapsed .app-sidebar .nav-link {
+.sidebar-collapsed .app-sidebar * {
   display: none;
 }
-.sidebar-collapsed .app-sidebar .brand img {
-  height: 36px;
+.sidebar-collapsed .sidebar-toggle {
+  display: none;
+}
+.sidebar-collapsed .floating-toggle {
+  display: inline-flex;
 }
 
 .brand {
@@ -131,7 +150,7 @@ body {
   gap: 14px;
 }
 .topbar-logo {
-  height: 40px;
+  height: 80px;
   width: auto;
   filter: drop-shadow(0 6px 12px rgba(0,0,0,0.12));
   margin-right: 10px;
@@ -214,9 +233,17 @@ body {
   justify-content: space-between;
   gap: 16px;
   box-shadow: var(--shadow);
-  min-height: 64px;
+  min-height: 96px;
 }
 .topbar { position: relative; }
+.topbar::after {
+  content: "";
+  position: absolute;
+  inset: 0;
+  border-radius: 18px;
+  box-shadow: 0 18px 30px rgba(22, 32, 74, 0.12);
+  pointer-events: none;
+}
 .page-title {
   margin: 0;
   font-size: 1.25rem;
diff --git a/public/assets/js/app.js b/public/assets/js/app.js
index 4823835..0418c8a 100755
--- a/public/assets/js/app.js
+++ b/public/assets/js/app.js
@@ -1,13 +1,14 @@
 (() => {
-  const toggle = document.querySelector('[data-sidebar-toggle]');
-  if (toggle) {
+  const toggles = document.querySelectorAll('[data-sidebar-toggle]');
+  toggles.forEach((toggle) => {
     toggle.addEventListener('click', () => {
       document.body.classList.toggle('sidebar-collapsed');
       localStorage.setItem('sidebar-collapsed', document.body.classList.contains('sidebar-collapsed') ? '1' : '0');
     });
-  }
+  });
 
-  if (localStorage.getItem('sidebar-collapsed') === '1') {
+  const saved = localStorage.getItem('sidebar-collapsed');
+  if (saved === null || saved === '1') {
     document.body.classList.add('sidebar-collapsed');
   }
 })();