.crm-gallery { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .5rem; }
.crm-gallery-item { position: relative; height: 110px; overflow: hidden; }
.crm-gallery-item:first-child { grid-column: span 2; height: 240px; }
.crm-gallery-item img { width: 100%; height: 100%; object-fit: cover; }
.btn-whatsapp { background-color: #25d366; color: #fff; }
.btn-whatsapp:hover, .btn-whatsapp:focus { background-color: #20b658; color: #fff; }
@media (min-width: 768px) {
  .crm-gallery { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .crm-gallery-item { height: 156px; }
  .crm-gallery-item:first-child { grid-row: span 2; height: 320px; }
  .crm-gallery--single .crm-gallery-item { grid-column: 1 / -1; }
}