.substack-feed-embed {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));

  gap: 1.5rem;

  max-width: 1400px;
  margin: 0 auto;

  padding: 1rem;
}

.substack-card {
  display: block;
  text-decoration: none;
  color: inherit;
  margin-bottom: 2rem;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  overflow: hidden;
  transition: box-shadow 0.2s;
}

.substack-card:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.substack-thumbnail {
  width: 100%;
  /*height: 160px;*/
  object-fit: cover;
  display: block;
}

.substack-post {
  padding: 1.2rem;
}

.substack-title {
  margin: 1.5rem 0 1rem 0;
  font-size: 1.25rem;
  line-height: 1.4;
}

.substack-date {
  color: #666;
  font-size: 0.9rem;
  margin: 0 0 0.8rem;
}

.substack-desc {
  margin: 0;
  color: #444;
  font-size: 0.95rem;
  line-height: 1.5;
}

.substack-error, .substack-empty {
  color: #c00;
  font-style: italic;
}