diff --git a/tools/reverse-proxy/nginx.conf b/tools/reverse-proxy/nginx.conf
index 2304efc..dd7420a 100644
--- a/tools/reverse-proxy/nginx.conf
+++ b/tools/reverse-proxy/nginx.conf
@@ -12,8 +12,16 @@ http {
     include       /etc/nginx/mime.types;
     default_type  application/octet-stream;
 
-    # Log format - includes IP, timestamp, method, URL, status, referrer
-    log_format  main  '$remote_addr [$time_local] $request_method "$request_uri" $status "$http_referer"';
+    # Map status to result label
+    map $status $result {
+        ~^[23]  "success";
+        ~^4     "client_error";
+        ~^5     "server_error";
+        default "unknown";
+    }
+
+    # Log format - includes IP, timestamp, method, URL, status, result, referrer
+    log_format  main  '$remote_addr [$time_local] $request_method "$request_uri" $status $result "$http_referer"';
 
     # Map to identify errors (4xx/5xx)
     map $status $is_error {