.modal-close-btn {
  position: absolute;
  right: 1em;
  top: 1em;
  width: 2em;
  height: 2em;
  opacity: 0.3;
  z-index: 1;
}
.modal-close-btn:hover {
  opacity: 1;
}
.modal-close-btn:before, .modal-close-btn:after {
  position: absolute;
  left: 15px;
  content: ' ';
  height: 33px;
  width: 2px;
  background-color: #333;
}
.modal-close-btn:before {
  transform: rotate(45deg);
}
.modal-close-btn:after {
  transform: rotate(-45deg);
}

.custom-modal-content {
  /**/
}