.collection-list-wrapper {
  background-color: rgb(var(--color-background));
}

/* Square media: the theme rounds the card frame with .collection-card-border-shadow
   (--collection-card-border-radius), which the design does not use here. */
.collection-list-wrapper .block-collection-card__image-wrapper,
.collection-list-wrapper .block-collection-card__image-wrapper img {
  border-radius: 0;
}