.book-home {
  display: grid;
  grid-template-columns: minmax(240px, 0.78fr) minmax(320px, 1.3fr);
  gap: 3rem;
  align-items: start;
  margin-top: 1rem;
}
.book-cover img {
  width: 100%;
  max-width: 420px;
  box-shadow: 0 12px 34px rgba(0,0,0,.18);
}
.book-intro { padding-top: .5rem; }
.book-intro h2 { margin-top: 0; }
.btn { margin: .35rem .5rem .35rem 0; }
@media (max-width: 780px) {
  .book-home { grid-template-columns: 1fr; gap: 1.5rem; }
  .book-cover { text-align: center; }
  .book-cover img { max-width: 330px; }
}
.retrait-composite,
.retrait-documente {
  border-left: 4px solid #777;
}