.concept-masonry {
  column-count: 1;
  column-gap: 1.5rem;
  row-gap: 1.5rem;
}

@media (min-width: 576px) {
  .concept-masonry {
    column-count: 2;
  }
}

@media (min-width: 992px) {
  .concept-masonry {
    column-count: 3;
  }
}

.concept-masonry > div {
  break-inside: avoid;
  margin-bottom: 1.5rem;
}