diff --git a/includes/session_check.php b/includes/session_check.php
index 930c516..8945ff5 100644
--- a/includes/session_check.php
+++ b/includes/session_check.php
@@ -24,8 +24,10 @@ function checkSession(): void
     validateSessionDomain();
 
     if (!isset($_SESSION['user_id'])) {
-        $scheme = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') ? 'https' : 'http';
-        $host = $_SERVER['HTTP_HOST'] ?? 'localhost';
+        $appUrl = $_ENV['APP_URL'] ?? getenv('APP_URL') ?? '';
+        $parsed = parse_url($appUrl);
+        $scheme = $parsed['scheme'] ?? 'https';
+        $host = $parsed['host'] ?? $_SERVER['HTTP_HOST'] ?? 'localhost';
         header('Location: ' . $scheme . '://' . $host . '/login.php');
         exit;
     }