.image-on-top {
  z-index: -1;
  margin-left: auto;
  margin-top: -25%;
  padding-bottom: -25%;
}

@media (min-width: 992px) {
  .image-on-top {
    margin-top: -12%;
    padding-bottom: -12%;
  }
}
#logo > a > img {
  max-width: 200px;
  width: 100%;
}