diff --git a/LittleShop/Areas/Admin/Controllers/AccountController.cs b/LittleShop/Areas/Admin/Controllers/AccountController.cs
index 727eb29..d8aeff6 100644
--- a/LittleShop/Areas/Admin/Controllers/AccountController.cs
+++ b/LittleShop/Areas/Admin/Controllers/AccountController.cs
@@ -29,8 +29,12 @@ public class AccountController : Controller
 
     [HttpPost]
     // [ValidateAntiForgeryToken] // Temporarily disabled for HTTPS proxy issue
-    public async Task<IActionResult> Login(string username, string password)
+    public async Task<IActionResult> Login(string Username, string Password)
     {
+        // Make parameters case-insensitive for form compatibility
+        var username = Username?.ToLowerInvariant();
+        var password = Password;
+
         Console.WriteLine($"Received Username: '{username}', Password: '{password}'");
         
         if (string.IsNullOrEmpty(username) || string.IsNullOrEmpty(password))
@@ -39,8 +43,8 @@ public class AccountController : Controller
             return View();
         }
 
-        // Use AuthService to validate against database users
-        var loginDto = new LoginDto { Username = username, Password = password };
+        // Use AuthService to validate against database users (username already lowercase)
+        var loginDto = new LoginDto { Username = username!, Password = password };
         var authResponse = await _authService.LoginAsync(loginDto);
         
         if (authResponse != null)