.book-promo {
  --book-navy: #252d63;
  --book-red: #8f2940;
  --book-ink: #101828;
  --book-muted: #536070;
  --book-paper: #f7f9fc;
  --book-line: #dbe1eb;
  position: relative;
  overflow: hidden;
  padding: 88px 0;
  color: var(--book-ink);
  background:
    linear-gradient(120deg, rgba(37, 45, 99, 0.07), transparent 44%),
    var(--book-paper);
  border-top: 1px solid var(--book-line);
  border-bottom: 1px solid var(--book-line);
}

.book-promo-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  align-items: center;
  gap: clamp(48px, 8vw, 104px);
}

.book-promo-copy {
  max-width: 680px;
}

.book-eyebrow {
  display: block;
  margin-bottom: 10px;
  color: var(--book-red);
  font-size: 12px;
  font-weight: 800;
  line-height: 1.5;
  text-transform: uppercase;
}

.book-promo h2 {
  margin: 0 0 16px;
  color: var(--book-navy);
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.16;
  letter-spacing: 0;
}

.book-promo-copy > p {
  max-width: 620px;
  margin-bottom: 25px;
  color: var(--book-muted);
  font-size: 16px;
  line-height: 1.75;
}

.book-promo-highlights {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 24px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.book-promo-highlights li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: #344054;
  font-size: 14px;
  line-height: 1.55;
}

.book-promo-highlights i {
  flex: 0 0 22px;
  width: 22px;
  height: 22px;
  margin-top: 1px;
  color: #ffffff;
  background: var(--book-red);
  border-radius: 50%;
  font-size: 11px;
  line-height: 22px;
  text-align: center;
}

.book-promo-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
  margin-top: 30px;
}

.book-primary-action,
.book-secondary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.book-primary-action {
  gap: 10px;
  padding: 12px 20px;
  color: #ffffff;
  background: var(--book-navy);
  border: 1px solid var(--book-navy);
  border-radius: 6px;
}

.book-primary-action:hover,
.book-primary-action:focus-visible {
  color: #ffffff;
  background: var(--book-red);
  border-color: var(--book-red);
}

.book-secondary-action {
  color: var(--book-navy);
  border-bottom: 2px solid var(--book-red);
}

.book-secondary-action:hover,
.book-secondary-action:focus-visible {
  color: var(--book-red);
}

.book-promo-cover-link {
  display: block;
  width: min(100%, 340px);
  justify-self: center;
  perspective: 1000px;
}

.book-promo-cover {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid rgba(37, 45, 99, 0.16);
  border-radius: 4px;
  box-shadow: 0 24px 44px rgba(24, 31, 72, 0.22);
  transform-origin: 50% 90%;
  animation: book-attention 12s ease-in-out infinite;
}

@keyframes book-attention {
  0%, 2%, 4%, 6%, 8%, 100% { transform: rotate(0deg) translateX(0); }
  1%, 5% { transform: rotate(-1.5deg) translateX(-3px); }
  3%, 7% { transform: rotate(1.5deg) translateX(3px); }
}

.book-page {
  min-width: 0;
  color: #101828;
  background: #ffffff;
  overflow-x: hidden;
}

.book-page .header {
  position: relative;
  background: linear-gradient(45deg, #6831e3, #f528cb);
  box-shadow: 0 8px 24px rgba(74, 34, 145, 0.18);
}

.book-page .header .navbar-area {
  position: relative;
  background: transparent;
}

.book-page .header .navbar {
  min-height: 82px;
}

.book-page .header .logo {
  top: 0;
  width: 160px;
  height: 46px;
}

.book-page .header .logo img {
  position: static;
  width: 160px;
  max-height: 46px;
  object-fit: contain;
}

.book-page .header .logo .alt-logo {
  display: none;
}

.book-page .header .navbar-nav .nav-item {
  margin-left: 0;
}

.book-page .header .navbar-nav .nav-item a {
  padding: 28px 0;
}

.book-page-hero {
  padding: 84px 20px 96px;
  color: #ffffff;
  background: #202850;
}

.book-page-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  align-items: center;
  gap: clamp(48px, 8vw, 108px);
  width: min(1120px, 100%);
  margin-inline: auto;
}

.book-page-hero .book-eyebrow {
  color: #ffb1c1;
}

.book-page-hero h1 {
  max-width: 760px;
  margin-bottom: 20px;
  color: #ffffff;
  font-size: clamp(38px, 6vw, 68px);
  line-height: 1.08;
  letter-spacing: 0;
}

.book-page-hero p {
  max-width: 650px;
  margin-bottom: 28px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 17px;
  line-height: 1.75;
}

.book-page-hero .book-primary-action {
  color: #202850;
  background: #ffffff;
  border-color: #ffffff;
}

.book-page-hero .book-primary-action:hover,
.book-page-hero .book-primary-action:focus-visible {
  color: #ffffff;
  background: #8f2940;
  border-color: #8f2940;
}

.book-page-cover {
  display: block;
  width: min(100%, 350px);
  justify-self: center;
  border-radius: 4px;
  box-shadow: 0 30px 55px rgba(0, 0, 0, 0.34);
  animation: book-attention 12s ease-in-out infinite;
}

.book-detail-band {
  padding: 78px 20px;
}

.book-detail-band:nth-child(odd) {
  background: #f7f9fc;
}

.book-detail-inner {
  width: min(1040px, 100%);
  margin-inline: auto;
}

.book-detail-inner h2 {
  margin-bottom: 18px;
  color: #252d63;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.2;
  letter-spacing: 0;
}

.book-detail-inner p {
  max-width: 880px;
  color: #536070;
  font-size: 16px;
  line-height: 1.8;
}

.book-goals,
.book-feature-list {
  margin: 24px 0 0;
  color: #344054;
  font-size: 16px;
  line-height: 1.7;
}

.book-goals li,
.book-feature-list li {
  margin-bottom: 10px;
}

.book-feature-list {
  columns: 2;
  column-gap: 56px;
  padding-left: 22px;
}

.book-final-cta {
  padding: 72px 20px;
  color: #ffffff;
  background: #8f2940;
  text-align: center;
}

.book-final-cta h2 {
  margin-bottom: 12px;
  color: #ffffff;
  font-size: clamp(28px, 4vw, 42px);
  letter-spacing: 0;
}

.book-final-cta p {
  max-width: 680px;
  margin: 0 auto 24px;
  color: rgba(255, 255, 255, 0.84);
  line-height: 1.7;
}

@media (min-width: 992px) {
  .book-page .header .navbar-collapse {
    position: static;
  }

  .book-page .header .navbar-nav {
    position: absolute;
    left: 50%;
    gap: 22px;
    margin: 0 !important;
    white-space: nowrap;
    transform: translateX(-50%);
  }

  .book-page .header .nav-right {
    position: absolute;
    right: 0;
  }
}

@media (max-width: 991px) {
  .book-promo-layout,
  .book-page-hero-inner {
    grid-template-columns: 1fr;
  }

  .book-promo-copy,
  .book-page-hero-copy {
    max-width: none;
  }

  .book-promo-cover-link,
  .book-page-cover {
    width: min(72vw, 330px);
  }

  .book-page .header .navbar {
    min-height: 74px;
    padding: 14px 0;
  }

  .book-page .header .navbar-toggler {
    border-color: rgba(255, 255, 255, 0.85);
  }

  .book-page .header .navbar-toggler .toggler-icon {
    background: #ffffff;
  }

  .book-page .header .navbar-nav .nav-item a {
    padding: 10px 8px;
    color: #101828;
  }

  .book-page-hero-cover {
    order: 2;
  }
}

@media (max-width: 575px) {
  .book-promo,
  .book-detail-band {
    padding: 60px 0;
  }

  .book-promo-layout {
    gap: 42px;
  }

  .book-promo-highlights {
    grid-template-columns: 1fr;
  }

  .book-promo-actions,
  .book-primary-action {
    width: 100%;
  }

  .book-secondary-action {
    min-height: 40px;
  }

  .book-page-hero {
    padding: 60px 18px 72px;
  }

  .book-feature-list {
    columns: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .book-promo-cover,
  .book-page-cover {
    animation: none;
  }
}