.book-head {
  display: grid;
  grid-template-columns: minmax(180px, 280px) 1fr;
  gap: 32px;
  align-items: start;
  margin-bottom: 36px;
}
.book-jacket {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: contain;
  border-radius: 12px;
  border: 1.5px solid var(--line);
  box-shadow: var(--shadow);
  display: block;
  background: #f5efe7;
}
.book-category {
  display: inline-flex;
  padding: 5px 12px;
  border-radius: 999px;
  background: #fff3ec;
  color: #ff7a2f;
  font-size: 0.78rem;
  font-weight: 900;
  margin-bottom: 10px;
}
.book-title-block h1 {
  font-size: clamp(1.55rem, 4vw, 2.45rem);
  line-height: 1.32;
  margin: 0 0 8px;
}
.book-meta {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
  margin: 0 0 18px;
}
.book-title-block p,
.book-title-block ul {
  line-height: 1.9;
}
.book-title-block ul {
  padding-left: 1.1em;
  margin: 14px 0 20px;
}
.book-quote {
  margin: 18px 0;
  padding: 18px 22px;
  border-left: 6px solid #ff7a2f;
  background: #fff8f3;
  border-radius: 0 14px 14px 0;
  line-height: 1.95;
  font-size: 1.02rem;
  font-weight: 650;
}
.quote-src {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-weight: 900;
}
.book-shop-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}
.amazon-btn,
.rakuten-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 18px;
  border-radius: 999px;
  background: #bf0000;
  color: #fff;
  font-weight: 900;
  text-decoration: none;
}
.amazon-btn {
  background: #232f3e;
}
.rakuten-btn {
  background: #bf0000;
}
.note-label {
  display: block;
  margin-bottom: 8px;
  color: #ff7a2f;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
}
.affiliate-note {
  margin-top: 28px;
  font-size: 0.76rem;
  color: var(--muted);
  text-align: center;
}
@media (max-width: 700px) {
  .book-head { grid-template-columns: 1fr; gap: 20px; }
  .book-jacket { max-width: 240px; margin: 0 auto; }
  .book-shop-links { display: grid; }
}