@media (min-width: 1200px) {
  .container {
    width: 1020px; } 
}

@media(max-width: 1023px) {
    body{ height: 90vh;}
   .d-table { display: block; }
   .login-box { width: 90%; }
   .left-part, .right-part { display: block; padding: 30px; width: 79%;}
   .left-part { padding-bottom: 0; border:none;}
   .right-part { padding-top: 0; }
   header h4 { margin-top: 40px; margin-bottom: 30px;}
   .login-box { margin-top: 25%; } 
}