.col-md-6,
.col-md-4 {
  height: auto;
  margin-bottom: 50px;
}

.gallery-img {
  width: 100%;
  height: 475px;
  border-radius: 5px;
  overflow: hidden;
  position: relative;
}

.gallery-img--middle {
  height: 310px;
}

.gallery-img img {
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  width: 0;
  height: 0;
  min-width: 100%;
  min-height: 100%;
  -o-object-fit: cover;
     object-fit: cover;
}

.gallery {
  margin-top: 60px;
  margin-bottom: 80px;
}

@media (max-width: 1170px) {
  .col-md-6,
  .col-md-4 {
    height: auto;
    margin-bottom: 30px;
  }
  .gallery-img {
    height: 375px;
  }
  .gallery-img--middle {
    height: 245px;
  }
}

@media (max-width: 991px) {
  .gallery-img {
    height: 240px;
  }
  .gallery-img--middle {
    height: 155px;
  }
}

@media (max-width: 767px) {
  .gallery-img {
    height: 300px;
  }
  .gallery-img--middle {
    height: 300px;
  }
}

@media (max-width: 575px) {
  .gallery-img {
    height: 200px;
  }
  .gallery-img--middle {
    height: 200px;
  }
}