.wp-block-gallery {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
  align-items: center;
}
.wp-block-gallery.aligncenter {
  justify-content: center;
  text-align: center;
}
.wp-block-gallery.aligncenter .wp-block-image img {
  margin: 0 auto;
}
.wp-block-gallery.columns-4 .wp-block-image {
  flex: 0 1 calc(25% - 30px);
}
@media screen and (max-width: 768px) {
  .wp-block-gallery.columns-4 .wp-block-image {
    flex: 0 1 calc(50% - 20px);
  }
}
@media screen and (max-width: 500px) {
  .wp-block-gallery.columns-4 .wp-block-image {
    flex: 1 1 100%;
  }
}