.post-card {
  border: 1px solid #e6e6e6;
  border-radius: 14px;
  background: #fff;
  overflow: hidden;
  margin: 1rem 0;
  transition: box-shadow .2s ease;
}
.post-card[open] { box-shadow: 0 8px 24px rgba(0,0,0,.08); }

/* Cover */
.post-cover {
  list-style: none;               /* hides default marker */
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 14px;
  align-items: center;
  padding: 12px;
  cursor: pointer;
  user-select: none;
}
.post-cover::-webkit-details-marker { display: none; } /* safari/chrome marker */
.post-cover::after{
  content: "▸";
  margin-left: auto;
  font-size: 18px;
  transition: transform .2s ease;
}
.post-card[open] .post-cover::after{ transform: rotate(90deg); }

.post-cover img{
  width: 120px; height: 80px; object-fit: cover;
  border-radius: 10px;
}
.post-meta h3{
  margin: 0 0 4px; font-size: 1.05rem; font-weight: 700;
}
.post-meta p{
  margin: 0; font-size: .85rem; color: #666;
}

/* body */
.post-body{
  padding: 12px 14px 16px;
  line-height: 1.6;
}