@mixin card-deck-column-count($count: 1) {
  flex: 0 0 calc(100% / #{$count} - #{$card-deck-margin} * 2);
  border: none;
}

.card-deck {
  .card {
    @include media-breakpoint-between(sm, md) {
      @include card-deck-column-count(2);
    }
  }
}