.container-destacado h3 {
  font-size: clamp(1.5rem, 5vw, 2.2rem);
  font-weight: 300;
  font-family: var(--f3);
  text-align: center;
  line-height: normal;
}
.contenido-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  width: 94%;
  max-width: 735px;
  margin: 40px auto;
}

.contenido-grid img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 8px;
}

@media (min-width: 768px) {
  .contenido-grid {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
  }

  .item-img1 {
    grid-column: 1 / 2;
    grid-row: 1 / 2;
  }

  .item-img2 {
    grid-column: 1 / 2;
    grid-row: 2 / 3;
  }

  .item-img3 {
    grid-column: 2 / 3;
    grid-row: 1 / 3;
  }
}