.thumbnail img {
  object-fit: contain;
}

@media screen and (max-width: 749px) {
  .thumbnail-list__item.slider__slide {
    width: calc(25% - 0.6rem);
  }
}

@media screen and (min-width: 750px) {
  .product--thumbnail_slider .thumbnail-slider {
    margin-top: 2rem;
  }
}