.masonry-grid {
  max-width: 1200px;
  margin: 0 auto;
}

.masonry-grid-sizer {
  width: calc(33.333% - 10px); /* Subtract gutter */
}

.masonry-grid-item {
  width: calc(33.333% - 10px); /* Subtract gutter */
  margin-bottom: 15px;
}

.gallery-item {
  background: #fff;
  border-radius: 8px;
  overflow: hidden;
}

.gallery-item img {
  width: 100%;
  display: block;
}

/* Responsive */
@media (max-width: 768px) {
  .masonry-grid-sizer,
  .masonry-grid-item {
    width: calc(50% - 10px);
  }
}

@media (max-width: 480px) {
  .masonry-grid-sizer,
  .masonry-grid-item {
    width: 100%;
  }
}