.grid-item {
  /*break-inside: avoid-column;
  box-sizing: border-box;
  padding: 15px;
  background-color: #ddd;
  border-radius: 5px;
  margin-bottom: 20px; /* Espaço entre os blocos VERTICAIS */

  width: 31%;
  padding: 15px;
  background-color: #efefef;
  margin-bottom: 20px;
  box-sizing: border-box;
}

@media (max-width: 992px) {
  .grid-item {
    width: 100%;
  }
}