ASP.NET Mvc 4 css intricacy

[Phacker]

I everybody. I create ASP.NET Mvc4 application. I create login view.I create account part in a login view. My problem is that, when I test to create account if ModelState is not valid I get view without css template. I cann't fix it. Please help me.these are my actions\[code\] public ActionResult Login() { return View(); } [HttpPost] public ActionResult Login(User user) { if (ModelState.IsValid) { } return View(); } public ActionResult Create() { return View("Login"); } [HttpPost] public ActionResult Create(User user) { if (ModelState.IsValid) { } return View(); }\[/code\]