.book-page {
  background: var(--cream);
}
.book-breadcrumb {
  max-width: 1240px;
  margin: 0 auto;
  padding: 1.4rem clamp(1.25rem, 5vw, 4rem) 0;
  color: #62706d;
  font-size: 0.86rem;
}
.book-breadcrumb a {
  text-underline-offset: 3px;
}
.book-detail {
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(3rem, 8vw, 8rem);
  align-items: center;
  max-width: 1240px;
  margin: 0 auto;
  padding: clamp(3rem, 7vw, 7rem) clamp(1.25rem, 5vw, 4rem);
}
.book-detail-cover {
  display: grid;
  place-items: center;
  padding: clamp(2rem, 5vw, 4rem);
  background: linear-gradient(145deg, #efe5d0, #cdbb9d);
}
.book-detail-cover.yellow {
  background: #d9a92d;
}
.book-detail-cover.coral {
  background: #d86f55;
}
.book-detail-cover.blue {
  background: #163e4c;
}
.book-detail-cover img {
  width: min(100%, 390px);
  max-height: 660px;
  object-fit: contain;
  box-shadow: 0 26px 48px rgba(0, 0, 0, 0.3);
}
.book-detail-copy h1 {
  color: var(--ink);
  font-size: clamp(3rem, 6vw, 5.8rem);
}
.book-detail-copy .lead {
  margin: 1.5rem 0;
  font-family: var(--serif);
  font-size: clamp(1.3rem, 2vw, 1.7rem);
  font-weight: 700;
  line-height: 1.35;
}
.book-detail-copy > p:not(.eyebrow):not(.lead) {
  max-width: 720px;
  color: #4b5754;
}
.book-points {
  display: grid;
  gap: 0.65rem;
  margin: 2rem 0;
  padding: 0;
  list-style: none;
}
.book-points li {
  position: relative;
  padding-left: 1.5rem;
}
.book-points li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--coral-dark);
  font-weight: 900;
}
.book-biblio {
  margin: 1.8rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: #5b6764;
  font-size: 0.88rem;
  font-weight: 700;
}
.book-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2.2rem;
}
.book-content {
  padding: clamp(4rem, 8vw, 7rem) clamp(1.25rem, 7vw, 7.5rem);
  background: var(--paper);
}
.book-content-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(3rem, 8vw, 8rem);
  max-width: 1100px;
  margin: 0 auto;
}
.book-content h2 {
  margin-bottom: 1.4rem;
  font-family: var(--serif);
  font-size: clamp(2.2rem, 4vw, 3.5rem);
  font-weight: 400;
  letter-spacing: -0.03em;
}
.book-content h3 {
  margin: 1.6rem 0 0.6rem;
  color: var(--petrol);
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 400;
}
.book-content p {
  color: #4b5754;
}
.book-note {
  align-self: start;
  padding: 2rem;
  border-top: 4px solid var(--coral);
  background: var(--cream);
}
.book-note strong {
  display: block;
  margin-bottom: 0.7rem;
  font-family: var(--serif);
  font-size: 1.4rem;
}
.book-back-link {
  color: var(--coral-dark);
  font-weight: 750;
  text-underline-offset: 4px;
}
@media (max-width: 760px) {
  .book-detail,
  .book-content-inner {
    grid-template-columns: 1fr;
  }
  .book-detail {
    padding-top: 2rem;
  }
  .book-detail-cover img {
    width: min(82%, 350px);
  }
}