Update app.py

app.py

@@ -686,9 +686,10 @@ css = """
     /* The rest of the CSS is similar to button1 */
 }
  .logout-link {
-        position: absolute;
+        position: fixed;
         top: 10px;
         right: 10px;
+        width:50px;
         font-size: 14px;
         color: #007BFF;
         background: none;