.container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding: 12px;
  max-width: 900px;
  margin: 0 auto;
}
.container div {
  background-color: #f1f1f1;
  border: 1px solid #ddd;
  border-radius: 8px;
  overflow: hidden;
  aspect-ratio: 3 / 4;
}

.container div img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

@media (max-width: 600px) {
  .container {
    grid-template-columns: repeat(2, 1fr);
  }
}

h1 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 2rem;
}