diff --git a/public/js/app.js b/public/js/app.js
index b1fd073..56c5602 100644
--- a/public/js/app.js
+++ b/public/js/app.js
@@ -21,9 +21,12 @@ function queryParams() {
   return params.toString();
 }
 
+// Detect base path from current URL (works behind nginx proxy)
+const BASE_PATH = window.location.pathname.replace(/\/$/, '');
+
 async function fetchAPI(endpoint) {
   const sep = endpoint.includes('?') ? '&' : '?';
-  const res = await fetch(`/api/${endpoint}${sep}${queryParams()}`, { headers: apiHeaders() });
+  const res = await fetch(`${BASE_PATH}/api/${endpoint}${sep}${queryParams()}`, { headers: apiHeaders() });
   if (!res.ok) throw new Error(`API error: ${res.status}`);
   return res.json();
 }
@@ -314,7 +317,7 @@ lucide.createIcons();
 
 (async function init() {
   // Check auth first before loading any data
-  const res = await fetch('/api/summary?period=24h', { headers: apiHeaders() });
+  const res = await fetch(`${BASE_PATH}/api/summary?period=24h`, { headers: apiHeaders() });
   if (res.status === 401) {
     const key = prompt('Enter Dashboard API Key:');
     if (key) {