/* Fixed width, auto height */
.carousel-img {
  width: 600px;      /* change this */
  height: auto;
  display: block;
  margin: 0 auto;    /* center in the item */
}

/* OR: full width of carousel, capped by height */
.carousel-img {
  width: 100%;
  max-height: 400px; /* change this */
  object-fit: contain;
}