.book-page .shell { padding-top: 28px; }
.book-page a:focus-visible { outline: 3px solid var(--ink); outline-offset: 6px; }
.skip-link { position: absolute; left: 20px; top: -100px; z-index: 5; padding: 12px; background: var(--sun); color: var(--ink); }
.skip-link:focus { top: 12px; }
.book-nav { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 28px; }
.book-nav a, .book-page footer a { color: var(--ink); font-weight: 800; text-underline-offset: 5px; }
.book-nav .brand { display: inline-flex; align-items: center; gap: 10px; font-size: 23px; text-decoration: none; }
.brand span { font-size: 14px; font-weight: 600; }
.book-hero { grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); padding: 38px; background: linear-gradient(120deg, rgba(255, 255, 255, .95), rgba(255, 228, 61, .22)); }
.book-hero > * { min-width: 0; }
.book-cover { display: block; width: 100%; max-width: 460px; margin: 0 auto; border: 2px solid var(--ink); border-radius: 18px; box-shadow: 6px 7px 0 var(--ink); }
.book-cover img { display: block; width: 100%; height: auto; border-radius: 16px; box-shadow: none; }
.eyebrow { display: block; margin-bottom: 16px; font-size: 13px; font-weight: 800; letter-spacing: 1.5px; text-transform: uppercase; }
.book-hero h1 { font-size: clamp(44px, 7vw, 76px); line-height: 1; letter-spacing: -2px; margin-bottom: 24px; }
.book-hero h1 span { color: var(--orange); }
.book-hero .hero-hook { font-size: clamp(24px, 3vw, 32px); font-weight: 800; line-height: 1.25; margin-bottom: 20px; }
.book-hero .hero-copy > p:not(.hero-hook) { font-size: 17px; }
.book-hero .cta-row { margin-top: 24px; }
.book-hero .tags { margin-top: 28px; gap: 8px; }
.book-hero .tag { font-size: 12px; padding: 6px 9px; box-shadow: 3px 3px 0 var(--ink); }
.book-hero .tag:nth-child(2) { background: var(--petal); }
.book-hero .tag:nth-child(3) { background: var(--paper); }
.book-page .section-head { flex-wrap: wrap; }
.book-page .section-head > span { font-size: 13px; }
.book-details { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.book-page .card { padding: 24px; }
.book-page .pill { font-size: 13px; }
.book-page .card:nth-child(2) .pill { background: var(--aqua); }
.book-page .learning-grid .card:nth-child(3n + 2) .pill { background: var(--aqua); }
.book-page .learning-grid .card:nth-child(3n) .pill { background: var(--petal); }
.story-card p { max-width: 850px; }
.book-outro { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding: 30px; border: 2px solid var(--ink); border-radius: 22px; background: var(--sun); box-shadow: 8px 10px 0 var(--ink); }
.book-outro h2 { margin: 0; font-size: clamp(28px, 4vw, 38px); line-height: 1.1; letter-spacing: -1px; }
.book-outro p { line-height: 1.5; margin-bottom: 0; }
.book-outro .btn { flex-shrink: 0; }
@media (max-width: 820px) {
  .book-hero { grid-template-columns: minmax(0, 1fr); padding: 28px; }
  .book-hero .tags { justify-content: center; }
  .book-details { grid-template-columns: minmax(0, 1fr); }
  .book-details .cta-row { justify-content: flex-start; }
}
@media (max-width: 480px) {
  .book-page .shell { padding: 20px 18px 48px; }
  .book-nav { gap: 12px; font-size: 14px; }
  .brand span { display: none; }
  .book-hero { padding: 24px 18px; }
  .book-page .section-head { text-align: center; }
  .learning-grid { grid-template-columns: minmax(0, 1fr); }
  .book-outro { flex-direction: column; align-items: flex-start; padding: 24px; }
}
@media (prefers-reduced-motion: reduce) {
  .book-page .btn { transition: none; }
}