less margin for mobile zen mode

frontend/index.html

@@ -935,6 +935,12 @@
                 font-size: 10px;
             }
             
+            /* Zen mode mobile adjustments - use 95% width instead of fixed padding */
+            .zen-mode-active .zen-editor-container {
+                padding: 1rem 2.5%;
+                width: 100%;
+            }
+            
         }
         
         @media (min-width: 769px) {