.image-gallery {
  display: flex;
  justify-content: space-around;
  flex-flow: row wrap;
}
.image-gallery .image {
  width: calc(50% - 10px);
  margin: 5px;
}
.image-gallery .image > a {
  display: block;
}
.image-gallery .image > a img {
  width: 100%;
}