Buttons

.carousel {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 200px;
  gap: 1rem;
}

.slide {
  width: 100%;
  aspect-ratio: 3 / 4;
}

<BlossomCarousel class="carousel">
  <div class="slide"></div>
  <div class="slide"></div>
  <div class="slide"></div>
  ...
</BlossomCarousel>

<button onclick="carousel.prev()">Previous</button>
<button onclick="carousel.next()">Next</button>