<div class="container">
    <div class="ortala">
    	<form action="">
    	    ...
        </form>
    </div>
</div>

    .container{
       max-width: 1440px !important;
       width: 100% !important;
       height: 100vh;
       margin: auto !important;
       align-items: center;
    }
    .ortala{
        position: absolute;
        top: 50;
    }