/* ============================================================
   BOOK PAGE
   ============================================================ */

.navbar.is-scrolled {
  background: rgba(11, 30, 45, 0.97);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--border-lo);
}

/* ============================================================
   PAGE HEADER
   ============================================================ */
.page-header {
  background: var(--bg-teal);
  padding: 120px 0 64px;
}

.book-page-header .page-header-desc {
  font-family: var(--serif);
  font-size: 22px;
  font-style: italic;
  font-weight: 400;
  color: var(--text-mid);
  margin-top: 6px;
}

.page-header-title {
  font-family: var(--serif);
  font-size: clamp(34px, 4.9vw, 56px);
  font-weight: 700;
  color: var(--text-hi);
  line-height: 1.0;
  margin: 10px 0 8px;
}


/* ============================================================
   ABOUT SECTION
   ============================================================ */
.book-about {
  background: var(--bg-warm);
  padding: 56px 0;
}

.book-about-layout {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(48px, 6vw, 96px);
  align-items: flex-start;
}

/* Cover + purchase */
.book-about-cover {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
  flex-shrink: 0;
}

.book-about-img {
  width: clamp(160px, 20vw, 240px);
  border-radius: 3px;
}

.book-purchase-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-dark-mid);
  margin-bottom: 10px;
  text-align: center;
}

.book-purchase-btns {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
}

.book-purchase-btns .btn-buy {
  justify-content: center;
  width: 100%;
}

/* About text */
.book-section-label {
  font-family: var(--sans);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #2a7a84;
  margin-bottom: 16px;
  display: block;
}

.book-about-text {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.book-about-text p {
  font-size: 15px;
  color: var(--text-dark-mid);
  line-height: 1.80;
}

.book-about-text p em {
  font-style: italic;
  color: var(--text-dark);
}

.book-extras {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 8px;
  border-top: 1px solid rgba(0, 0, 0, 0.10);
  margin-top: 6px;
}

.book-extra-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
  color: #2a7a84;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(42, 122, 132, 0.35);
  transition: color var(--ease), text-decoration-color var(--ease);
}
.book-extra-link:hover {
  color: var(--text-dark);
  text-decoration-color: var(--text-dark);
}

.book-extra-icon {
  font-size: 15px;
  line-height: 1;
}


/* ============================================================
   ENDORSEMENTS SECTION
   ============================================================ */
.book-endorsements {
  background: var(--bg-warm);
  padding: 56px 0;
}

.book-section-label--light {
  color: var(--teal-dark, #2a8f9a);
}

.endorsements-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 8px;
}

.endorsement {
  padding: 32px 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.10);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: start;
}
.endorsement:first-child { border-top: 1px solid rgba(0, 0, 0, 0.10); }

.endorsement-text {
  font-family: var(--serif);
  font-size: clamp(16px, 1.8vw, 19px);
  font-style: italic;
  font-weight: 500;
  color: var(--text-dark);
  line-height: 1.65;
  max-width: 780px;
}

.endorsement-cite {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 220px;
  text-align: right;
  padding-top: 4px;
}

.endorsement-name {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dark);
  letter-spacing: 0.02em;
}

.endorsement-role {
  font-size: 12px;
  color: var(--text-dark-mid);
  line-height: 1.5;
}

.endorsement-role em {
  font-style: italic;
}


/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .endorsement {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .endorsement-cite { text-align: left; }
}

@media (max-width: 680px) {
  .book-about-layout {
    grid-template-columns: 1fr;
  }
  .book-about-cover {
    flex-direction: column;
    align-items: center;
  }
  .book-about-img { width: 200px; }
  .book-purchase-btns { flex-direction: row; flex-wrap: wrap; justify-content: center; }
  .book-purchase-btns .btn-buy { width: auto; }
  .book-purchase-label { text-align: center; }
}