diff --git a/public/index.html b/public/index.html
index 8a9eacc..0dffe3c 100644
--- a/public/index.html
+++ b/public/index.html
@@ -143,6 +143,7 @@
     </div>
 
     <script src="./vendor/d3.v7.min.js"></script>
+    <script src="./scripts/constants.js"></script>
     <script src="./scripts/framework.js"></script>
     <script src="./scripts/api-client.js"></script>
     <script src="./scripts/view-models.js"></script>
diff --git a/public/scripts/constants.js b/public/scripts/constants.js
new file mode 100644
index 0000000..0f577c9
--- /dev/null
+++ b/public/scripts/constants.js
@@ -0,0 +1,27 @@
+(function(){
+	const TIMING = {
+		NAV_COOLDOWN_MS: 300,
+		VIEW_FADE_OUT_MS: 150,
+		VIEW_FADE_IN_MS: 200,
+		VIEW_FADE_DELAY_MS: 50,
+		AUTO_REFRESH_MS: 30000,
+		PRIMARY_NODE_REFRESH_MS: 10000,
+		LOAD_GUARD_MS: 10000
+	};
+
+	const SELECTORS = {
+		NAV_TAB: '.nav-tab',
+		VIEW_CONTENT: '.view-content',
+		CLUSTER_STATUS: '.cluster-status'
+	};
+
+	const CLASSES = {
+		CLUSTER_STATUS_ONLINE: 'cluster-status-online',
+		CLUSTER_STATUS_OFFLINE: 'cluster-status-offline',
+		CLUSTER_STATUS_CONNECTING: 'cluster-status-connecting',
+		CLUSTER_STATUS_ERROR: 'cluster-status-error',
+		CLUSTER_STATUS_DISCOVERING: 'cluster-status-discovering'
+	};
+
+	window.CONSTANTS = window.CONSTANTS || { TIMING, SELECTORS, CLASSES };
+})(); 
\ No newline at end of file
diff --git a/public/scripts/framework.js b/public/scripts/framework.js
index ada9fb0..43ba9e8 100644
--- a/public/scripts/framework.js
+++ b/public/scripts/framework.js
@@ -614,7 +614,7 @@ class App {
         this.navigationInProgress = false;
         this.navigationQueue = [];
         this.lastNavigationTime = 0;
-        this.navigationCooldown = 300; // 300ms cooldown between navigations
+        this.navigationCooldown = (window.CONSTANTS && window.CONSTANTS.TIMING.NAV_COOLDOWN_MS) || 300; // cooldown between navigations
         
         // Component cache to keep components alive
         this.componentCache = new Map();
@@ -750,11 +750,11 @@ class App {
         // Fade out the container
         if (this.currentView.container) {
             this.currentView.container.style.opacity = '0';
-            this.currentView.container.style.transition = 'opacity 0.15s ease-out';
+            this.currentView.container.style.transition = `opacity ${(window.CONSTANTS && window.CONSTANTS.TIMING.VIEW_FADE_OUT_MS) || 150}ms ease-out`;
         }
         
         // Wait for fade out to complete
-        await new Promise(resolve => setTimeout(resolve, 150));
+        await new Promise(resolve => setTimeout(resolve, (window.CONSTANTS && window.CONSTANTS.TIMING.VIEW_FADE_OUT_MS) || 150));
     }
 
     // Show view smoothly
@@ -772,10 +772,10 @@ class App {
         
         // Fade in the container
         container.style.opacity = '0';
-        container.style.transition = 'opacity 0.2s ease-in';
+        container.style.transition = `opacity ${(window.CONSTANTS && window.CONSTANTS.TIMING.VIEW_FADE_IN_MS) || 200}ms ease-in`;
         
         // Small delay to ensure smooth transition
-        await new Promise(resolve => setTimeout(resolve, 50));
+        await new Promise(resolve => setTimeout(resolve, (window.CONSTANTS && window.CONSTANTS.TIMING.VIEW_FADE_DELAY_MS) || 50));
         
         // Fade in
         container.style.opacity = '1';
@@ -784,7 +784,7 @@ class App {
     // Update navigation state
     updateNavigation(activeRoute) {
         // Remove active class from all nav tabs
-        document.querySelectorAll('.nav-tab').forEach(tab => {
+        document.querySelectorAll((window.CONSTANTS && window.CONSTANTS.SELECTORS.NAV_TAB) || '.nav-tab').forEach(tab => {
             tab.classList.remove('active');
         });
 
@@ -795,7 +795,7 @@ class App {
         }
 
         // Hide all view contents with smooth transition
-        document.querySelectorAll('.view-content').forEach(view => {
+        document.querySelectorAll((window.CONSTANTS && window.CONSTANTS.SELECTORS.VIEW_CONTENT) || '.view-content').forEach(view => {
             view.classList.remove('active');
             view.style.opacity = '0';
             view.style.transition = 'opacity 0.15s ease-out';
@@ -838,7 +838,7 @@ class App {
 
     // Setup navigation
     setupNavigation() {
-        document.querySelectorAll('.nav-tab').forEach(tab => {
+        document.querySelectorAll((window.CONSTANTS && window.CONSTANTS.SELECTORS.NAV_TAB) || '.nav-tab').forEach(tab => {
             tab.addEventListener('click', () => {
                 const routeName = tab.dataset.view;
                 this.navigateTo(routeName);