diff --git a/assets/js/main.js b/assets/js/main.js
index caf3211..771572a 100644
--- a/assets/js/main.js
+++ b/assets/js/main.js
@@ -24,7 +24,7 @@ document.addEventListener('DOMContentLoaded', function () {
     const sceneVideoFileInput = document.getElementById('scene-video-file-input');
     
     // Camera specific elements
-    const cameraPermissionPrompt = document.getElementById('camera-permission-prompt');
+    const cameraPermissionGroup = document.getElementById('camera-permission-group');
     const grantCameraPermissionBtn = document.getElementById('grant-camera-permission-btn');
     const cameraDeviceSelection = document.getElementById('camera-device-selection');
     const sceneCameraDeviceInput = document.getElementById('scene-camera-device-input');
@@ -183,21 +183,39 @@ document.addEventListener('DOMContentLoaded', function () {
     // --- CAMERA & DEVICE MANAGEMENT ---
     function resetCameraUI() {
         cameraPermissionGranted = false;
-        sceneCameraDeviceInput.innerHTML = ''; // Clear dropdown
-        cameraErrorMessage.textContent = ''; // Clear any old errors
-        cameraDeviceSelection.style.display = 'none'; // Hide device selector
-        cameraPermissionPrompt.style.display = 'block'; // Show permission button
+        if (sceneCameraDeviceInput) {
+            sceneCameraDeviceInput.innerHTML = ''; // Clear dropdown
+        }
+        if (cameraErrorMessage) {
+            cameraErrorMessage.textContent = ''; // Clear any old errors
+        }
+        if (cameraDeviceSelection) {
+            cameraDeviceSelection.style.display = 'none'; // Hide device selector
+        }
+        if (cameraPermissionGroup) {
+            cameraPermissionGroup.style.display = 'block'; // Show permission button
+        }
     }
 
     function showCameraUI() {
-        cameraErrorMessage.textContent = '';
+        if (cameraErrorMessage) {
+            cameraErrorMessage.textContent = '';
+        }
         if (cameraPermissionGranted) {
-            cameraPermissionPrompt.style.display = 'none';
-            cameraDeviceSelection.style.display = 'block';
+            if (cameraPermissionGroup) {
+                cameraPermissionGroup.style.display = 'none';
+            }
+            if (cameraDeviceSelection) {
+                cameraDeviceSelection.style.display = 'block';
+            }
         } else {
             // This is the initial state, handled by resetCameraUI
-            cameraPermissionPrompt.style.display = 'block';
-            cameraDeviceSelection.style.display = 'none';
+            if (cameraPermissionGroup) {
+                cameraPermissionGroup.style.display = 'block';
+            }
+            if (cameraDeviceSelection) {
+                cameraDeviceSelection.style.display = 'none';
+            }
         }
     }