.modal {
  display: none;
  background: rgba(0, 0, 0, .30);
  z-index: 999;
  padding: 30px 0;

  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;

  overflow-x: hidden;
  overflow-y: auto;
}

.modal .modal-dialog {
  position: relative;
  width: 1100px;
  border-radius: 6px;
  -webkit-box-shadow: 0 3px 9px rgba(0, 0, 0, .5);
  box-shadow: 0 3px 9px rgba(0, 0, 0, .5);

  background: #fff;
  margin: 0 auto;
}