#links {
  margin: 0px -10px;
}
#links a.gallery_image {
  margin: 10px;
}
#links a.gallery_image img {
  display: inline-block;
  width: 150px;
  height: 100px;
  background-size: cover;
}
#links a.gallery_image img:hover {
  opacity: 0.7;
  transition: 0.3s;
}
@media (max-width: 530px) {
  #links a {
    display: inline-block;
    width: 45%;
    text-align: center;
  }
}
@media (max-width: 430px) {
  #links a {
    display: inline-block;
    width: 43%;
    text-align: center;
  }
}