.shop-section {
  background-image:
    linear-gradient(rgba(255, 253, 248, .91), rgba(255, 253, 248, .91)),
    url('assets/otter-background.jpg');
  background-position: center;
  background-size: auto, 760px auto;
}

.how {
  background-image:
    linear-gradient(rgba(247, 242, 232, .92), rgba(247, 242, 232, .92)),
    url('assets/otter-background.jpg');
  background-position: center;
  background-size: auto, 680px auto;
}

@media (max-width: 600px) {
  .shop-section,
  .how {
    background-size: auto, 560px auto;
  }
}