.mi-masonry-grid {
  display: flex;
  flex-wrap: wrap;
  margin: -5px; /* compensa el padding interior de los ítems */
}

.mi-masonry-grid .grid-item {
  width: calc(33.333% - 10px);
  margin: 5px;
  box-sizing: border-box;
}@media screen and (max-width: 480px) {
  .texto-responsive {
    font-size: 14px !important;
  }
}
@media screen and (max-width: 768px) {
  .texto-responsive {
    font-size: 16px !important;
  }
}