body.book-ux-optimized {
  --ux-wash: #fff0f7;
  --ux-ink: #6f1b4a;
  --ux-line: #ead7e2;
  --ux-shadow: rgba(111, 27, 74, 0.18);
  padding-bottom: 0;
  background: var(--bg);
}

body.book-ux-optimized.theme-werewolf {
  --ux-wash: #f4f0fb;
  --ux-ink: #593c78;
  --ux-line: #ded3eb;
  --ux-shadow: rgba(89, 60, 120, 0.2);
}

body.book-ux-optimized.theme-mafia,
body.book-ux-optimized.theme-dark-romance {
  --ux-wash: #f8eef1;
  --ux-ink: #73253d;
  --ux-line: #e7d0d7;
  --ux-shadow: rgba(115, 37, 61, 0.2);
}

body.book-ux-optimized.theme-billionaire {
  --ux-wash: #fff4ed;
  --ux-ink: #7b3e22;
  --ux-line: #ecd8cc;
  --ux-shadow: rgba(123, 62, 34, 0.18);
}

body.book-ux-optimized.theme-fantasy {
  --ux-wash: #eef6f5;
  --ux-ink: #245f5a;
  --ux-line: #cfe2df;
  --ux-shadow: rgba(36, 95, 90, 0.18);
}

.book-ux-optimized ::selection {
  background: #f6c9df;
  color: #4d1433;
}

.book-ux-optimized a:focus-visible,
.book-ux-optimized summary:focus-visible {
  outline: 3px solid #f4b63f;
  outline-offset: 3px;
}

.ux-book-hero {
  max-width: 1080px;
  padding-top: 34px;
  padding-bottom: 42px;
  display: grid;
  grid-template-areas: "cover copy";
  grid-template-columns: minmax(220px, 300px) minmax(0, 1fr);
  gap: clamp(30px, 5vw, 64px);
  align-items: start;
}

.ux-book-cover {
  grid-area: cover;
  position: sticky;
  top: 92px;
  border: 1px solid var(--ux-line);
  border-radius: 14px;
  overflow: hidden;
  background: var(--ux-wash);
  box-shadow: 0 24px 54px var(--ux-shadow);
}

.ux-book-cover img,
.ux-book-cover .cover-placeholder {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.ux-book-copy {
  grid-area: copy;
  min-width: 0;
}

.ux-book-copy h1 {
  max-width: 18ch;
  margin: 0 0 10px;
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.04;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.ux-book-byline {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.ux-book-topic {
  display: inline-block;
  margin-top: 12px;
  color: var(--ux-ink);
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
  text-underline-offset: 4px;
}

.ux-book-topic:hover {
  text-decoration: underline;
}

.ux-book-hook {
  max-width: 64ch;
  margin: 22px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--ux-line);
  color: var(--text);
  font-size: 18px;
  line-height: 1.55;
}

.ux-book-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 22px 0 0;
}

.ux-book-actions .button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--brand-dark);
  border-radius: 10px;
  padding: 11px 18px;
  white-space: nowrap;
}

.ux-book-actions .button.secondary {
  border-color: var(--line);
  background: var(--surface);
  color: var(--brand-dark);
}

.ux-book-actions .button:active,
.ux-mobile-app-bar .button:active {
  transform: translateY(1px);
}

.ux-book-summary {
  max-width: 72ch;
  margin-top: 28px;
}

.ux-book-summary h2 {
  margin-bottom: 8px;
  font-size: 22px;
}

.ux-book-summary p {
  margin: 0;
  color: var(--muted);
}

.ux-book-facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin: 26px 0 0;
  padding: 18px 0;
  border-top: 1px solid var(--ux-line);
  border-bottom: 1px solid var(--ux-line);
}

.ux-book-facts div {
  min-width: 0;
  padding: 0 14px;
  border-right: 1px solid var(--ux-line);
}

.ux-book-facts div:first-child {
  padding-left: 0;
}

.ux-book-facts div:last-child {
  padding-right: 0;
  border-right: 0;
}

.ux-book-facts dt {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.ux-book-facts dd {
  margin: 2px 0 0;
  color: var(--ux-ink);
  font-size: 17px;
  font-weight: 850;
  overflow-wrap: anywhere;
}

.ux-search-language {
  max-width: 72ch;
  margin-top: 18px;
  color: var(--muted);
  font-size: 13px;
}

.ux-search-language summary {
  width: fit-content;
  cursor: pointer;
  color: var(--brand-dark);
  font-weight: 800;
}

.ux-search-language p {
  margin: 8px 0 0;
}

.ux-content-notice {
  max-width: 72ch;
  margin-top: 18px;
  padding: 14px 16px;
  border: 1px solid var(--ux-line);
  border-radius: 12px;
  background: var(--ux-wash);
}

.ux-content-notice strong,
.ux-content-notice p {
  display: block;
  margin: 0;
}

.ux-content-notice p {
  margin-top: 4px;
  color: var(--muted);
  font-size: 14px;
}

.ux-section {
  max-width: 1080px;
  padding-top: 52px;
  padding-bottom: 52px;
}

.ux-section > h2,
.ux-section-heading h2 {
  max-width: 24ch;
  margin-bottom: 10px;
  font-size: clamp(27px, 4vw, 38px);
  letter-spacing: -0.018em;
  text-wrap: balance;
}

.ux-section-intro {
  max-width: 70ch;
  margin: 0;
  color: var(--muted);
}

.ux-expectation {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(320px, 1.18fr);
  gap: 42px;
  align-items: start;
  background: var(--ux-wash);
  border-radius: 14px;
  margin-top: 28px;
  padding: 28px;
}

.ux-expectation-list {
  display: grid;
  gap: 18px;
}

.ux-expectation-list article {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--ux-line);
}

.ux-expectation-list article:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.ux-expectation-list h3,
.ux-expectation-list p {
  margin: 0;
}

.ux-expectation-list p {
  margin-top: 4px;
  color: var(--muted);
}

.ux-trial-shell {
  margin-top: 28px;
  border: 1px solid var(--ux-line);
  border-radius: 14px;
  background: var(--surface);
  overflow: hidden;
}

.ux-trial-header,
.ux-trial-footer {
  padding: 22px clamp(20px, 5vw, 52px);
  background: var(--ux-wash);
}

.ux-trial-header h3,
.ux-trial-header p,
.ux-trial-footer p {
  margin: 0;
}

.ux-trial-header p,
.ux-trial-footer p {
  color: var(--muted);
}

.ux-trial-content {
  max-width: 72ch;
  margin: 0 auto;
  padding: 34px clamp(20px, 5vw, 52px);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 18px;
  line-height: 1.8;
}

.ux-trial-content p:first-child {
  margin-top: 0;
}

.ux-trial-content details summary {
  cursor: pointer;
  color: var(--brand-dark);
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 15px;
  font-weight: 800;
}

.ux-trial-footer .ux-book-actions {
  margin-top: 14px;
}

.ux-fit-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(320px, 1.2fr);
  gap: 42px;
  margin-top: 28px;
}

.ux-fit-summary {
  color: var(--text);
  font-size: 18px;
}

.ux-fit-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 28px;
}

.ux-fit-list article {
  padding-top: 14px;
  border-top: 1px solid var(--ux-line);
}

.ux-fit-list h3,
.ux-fit-list p {
  margin: 0;
}

.ux-fit-list p {
  margin-top: 5px;
  color: var(--muted);
  font-size: 14px;
}

.ux-chapter-list {
  margin-top: 24px;
  counter-reset: chapter;
}

.ux-chapter-list li {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: baseline;
  padding: 13px 0;
  border-bottom: 1px solid var(--ux-line);
  counter-increment: chapter;
}

.ux-chapter-list li::before {
  content: counter(chapter, decimal-leading-zero);
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.ux-chapter-list small {
  color: var(--muted);
}

.ux-chapter-more {
  margin-top: 12px;
}

.ux-chapter-more summary {
  cursor: pointer;
  color: var(--brand-dark);
  font-weight: 800;
}

.ux-related-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin-top: 26px;
}

.ux-related-book {
  min-width: 0;
}

.ux-related-book a {
  text-decoration: none;
}

.ux-related-cover {
  display: block;
  aspect-ratio: 3 / 4;
  border-radius: 12px;
  overflow: hidden;
  background: var(--ux-wash);
  box-shadow: 0 12px 28px var(--ux-shadow);
}

.ux-related-cover img,
.ux-related-cover .cover-placeholder {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ux-related-book h3 {
  margin: 13px 0 4px;
  font-size: 16px;
}

.ux-related-book p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.ux-discovery-links {
  margin-top: 26px;
}

.ux-discovery-links summary {
  cursor: pointer;
  color: var(--brand-dark);
  font-weight: 800;
}

.ux-discovery-links ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 24px;
  margin: 16px 0 0;
  padding-left: 20px;
}

.book-ux-optimized .faq {
  max-width: 820px;
}

.book-ux-optimized .faq details {
  border-color: var(--ux-line);
}

.ux-mobile-app-bar {
  display: none;
}

@media (max-width: 780px) {
  body.book-ux-optimized {
    padding-bottom: calc(78px + env(safe-area-inset-bottom));
  }

  .ux-book-hero {
    grid-template-areas:
      "copy"
      "cover";
    grid-template-columns: 1fr;
    gap: 28px;
    padding-top: 20px;
    padding-bottom: 34px;
  }

  .ux-book-copy h1 {
    max-width: none;
    font-size: clamp(28px, 8.2vw, 38px);
    line-height: 1.08;
  }

  .ux-book-hook {
    margin-top: 16px;
    padding-top: 14px;
    font-size: 16px;
  }

  .ux-book-actions {
    margin-top: 18px;
  }

  .ux-book-actions .button {
    min-height: 46px;
    flex: 1 1 150px;
  }

  .ux-book-summary {
    margin-top: 24px;
  }

  .ux-book-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    row-gap: 14px;
  }

  .ux-book-facts div,
  .ux-book-facts div:first-child,
  .ux-book-facts div:last-child {
    padding: 0 10px;
    border-right: 0;
  }

  .ux-book-facts div:nth-child(odd) {
    padding-left: 0;
    border-right: 1px solid var(--ux-line);
  }

  .ux-book-cover {
    position: static;
    width: min(230px, 68vw);
    margin: 0 auto;
  }

  .ux-section {
    padding-top: 38px;
    padding-bottom: 38px;
  }

  .ux-expectation,
  .ux-fit-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .ux-expectation {
    padding: 20px;
  }

  .ux-fit-list {
    grid-template-columns: 1fr;
  }

  .ux-trial-content {
    font-size: 17px;
  }

  .ux-chapter-list {
    padding-left: 0;
    list-style: none;
  }

  .ux-chapter-list li {
    grid-template-columns: 34px minmax(0, 1fr);
  }

  .ux-chapter-list small {
    grid-column: 2;
  }

  .ux-related-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 14px;
  }

  .ux-discovery-links ul {
    grid-template-columns: 1fr;
  }

  .ux-mobile-app-bar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 20;
    min-height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
    border-top: 1px solid var(--ux-line);
    background: rgba(255, 248, 251, 0.97);
    box-shadow: 0 -10px 30px rgba(64, 23, 48, 0.1);
  }

  .ux-mobile-app-bar span {
    min-width: 0;
    color: var(--muted);
    font-size: 12px;
    line-height: 1.25;
  }

  .ux-mobile-app-bar strong {
    display: block;
    color: var(--text);
    font-size: 13px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .ux-mobile-app-bar .button {
    min-height: 44px;
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    border-radius: 10px;
    white-space: nowrap;
  }
}