diff --git a/app.py b/app.py
index dee42e4..2c3a9c5 100644
--- a/app.py
+++ b/app.py
@@ -63,6 +63,19 @@ def seite(inhalt):
     }
     .topbar nav a:hover { border-color: #ccc; background: #f5f5f5; }
     .topbar nav a.aktiv { color: #cc181e; border-color: #cc181e; }
+    .topbar-back {
+      margin-left: auto;
+      font-size: 13px;
+      color: #167ac6;
+      text-decoration: none;
+      padding: 6px 14px;
+      border: 1px solid #167ac6;
+      border-radius: 2px;
+      font-weight: bold;
+      white-space: nowrap;
+      transition: background 0.15s, color 0.15s;
+    }
+    .topbar-back:hover { background: #167ac6; color: #fff; }
     .container {
       max-width: 900px;
       margin: 30px auto;
@@ -76,6 +89,7 @@ def seite(inhalt):
     <nav>
       <a href="/app/pinnwand" class="aktiv">Kommentare</a>
     </nav>
+    <a href="https://isa2.edumake.de" class="topbar-back">&#8592; Zurück zur Website</a>
   </div>
   <div class="container">""" + inhalt + """
   </div>