.post-image-wrapper {
  max-height: 420px;
  overflow: hidden;
  border-radius: 0.5rem;
  background: #f3f4f6; /* light gray */
}

.post-image-wrapper img {
  max-width: 100%;
  max-height: 420px;
  object-fit: contain;
  margin: 0 auto;
}