diff --git a/app/templates/login.html b/app/templates/login.html
index 6587350..c5bfd43 100644
--- a/app/templates/login.html
+++ b/app/templates/login.html
@@ -39,29 +39,25 @@
 <div class="alert alert-{{ 'success' if success else 'danger' }} mt-4">{{ message }}</div>
 {% endif %}
 <script>
-    document.addEventListener('DOMContentLoaded', function () {
+    document.addEventListener('DOMContentLoaded', () => {
         const tokenInput = document.getElementById('token');
-        const userInput = document.getElementById('user');
-        const pwInput = document.getElementById('pw');
-        const userLabel = document.getElementById('user-label');
-        const pwLabel = document.getElementById('pw-label');
+        const inputs = [document.getElementById('user'), document.getElementById('pw')];
+        const labels = [document.getElementById('user-label'), document.getElementById('pw-label')];
+        const fieldClasses = ['bg-body-secondary', 'text-body-secondary', 'text-decoration-line-through'];
 
         function toggleCredFields() {
-            const hasToken = tokenInput.value.trim() !== '';
-            [userInput, pwInput].forEach(el => {
-                el.readOnly = hasToken;
-                el.tabIndex = hasToken ? -1 : 0;
-                el.style.pointerEvents = hasToken ? 'none' : '';
-                if (hasToken && document.activeElement === el) {
+            const inactive = tokenInput.value.trim() !== '';
+            inputs.forEach(el => {
+                el.readOnly = inactive;
+                el.tabIndex = inactive ? -1 : 0;
+                el.style.pointerEvents = inactive ? 'none' : '';
+                if (inactive && document.activeElement === el) {
                     el.blur();
                 }
-                el.classList.toggle('bg-body-secondary', hasToken);
-                el.classList.toggle('text-decoration-line-through', hasToken);
-                el.classList.toggle('text-body-secondary', hasToken);
+                fieldClasses.forEach(cls => el.classList.toggle(cls, inactive));
             });
-            [userLabel, pwLabel].forEach(el => {
-                el.classList.toggle('text-decoration-line-through', hasToken);
-                el.classList.toggle('text-body-secondary', hasToken);
+            labels.forEach(el => {
+                ['text-decoration-line-through', 'text-body-secondary'].forEach(cls => el.classList.toggle(cls, inactive));
             });
         }