.book-title-subtitle {
  display: block;
  margin-top: .4em;
  color: var(--muted);
  font: 400 .82em/1.45 Segoe UI, Arial, sans-serif;
}

.detail-subtitle {
  margin: -4px 0 22px;
  color: #59675f;
  font: clamp(19px, 2vw, 25px)/1.45 Segoe UI, Arial, sans-serif;
}