.testimonial-cards {
  --box-shadow-width: min(3vw, 2.5rem);
  position: relative;
  margin: calc(-1 * var(--box-shadow-width));
  padding: var(--box-shadow-width);
  overflow: hidden;
}

.testimonial-cards--collapsed {
  max-height: 200vh;
}

.testimonial-cards__button-group {
  position: absolute;
  bottom: 0;
  display: flex;
  justify-content: center;
  width: 100%;
  height: 4.375rem;
}
.testimonial-cards__button-group:before {
  content: "";
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 100%;
  background-image: linear-gradient(to top, white, transparent);
}

.testimonial-cards__button {
  position: relative;
}