.image-gallery-lighthouse .modal-content .btn-close{
  position: absolute;
  right: 0;
  margin: 10px;
  background-color: #ffffffa3;
}
.image-gallery-lighthouse .pictureholder {
  height: 200px;
  border-radius: 20px 0 20px 0;
  background-size: cover;
  background-position: center;
  transition: all .25s;
}

.image-gallery-lighthouse .pictureholder:hover:before {
  content: "\f055";
  font-family: "Font Awesome 5 Pro";
  font-size: 40px;
  display: flex;
  height: 100%;
  top: 45%;
  color: #fff;
  background-color: #00000066;
  justify-content: center;
  border-radius: 20px 0 20px 0;
  align-items: center;
}