.book-main { max-width: 1200px; }
.book-main > .guide-breadcrumb { width: fit-content; max-width: 100%; padding: 10px 15px; border-radius: 12px; background: #f6f5eb; color: #52685b; flex-wrap: wrap; }
.book-skip { position: fixed; top: 8px; left: 8px; z-index: 20; padding: 12px 18px; background: var(--ink); color: white; transform: translateY(-150%); }
.book-skip:focus { transform: translateY(0); }
.book-page :focus-visible { outline: 3px solid #af5937; outline-offset: 5px; }
.book-hero { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: clamp(30px, 6vw, 80px); align-items: center; padding: 20px 0 65px; }
.book-hero-copy { padding: 32px; border: 1px solid rgba(24,57,47,.1); border-radius: 24px; background: rgba(246,245,235,.94); }
.book-hero h1 { margin: 20px 0 23px; font-size: clamp(3.9rem, 7.8vw, 7rem); line-height: .94; letter-spacing: -.07em; }
.book-hero h1 em { color: var(--green); font-style: normal; }
.book-hero-copy > p { color: #4e685a; font-size: 1rem; line-height: 1.8; }
.book-hero-copy > .book-intro { font-size: 1.2rem; line-height: 1.6; }
.book-download { margin-top: 14px; min-height: 52px; text-align: center; line-height: 1.5; }
.book-hero-copy > .book-download-note { margin: 12px 0 27px; font-size: .82rem; }
.book-cover { margin: 0; }
.book-cover img { display: block; width: 100%; height: auto; border-radius: 5px 17px 17px 5px; box-shadow: 0 25px 55px rgba(10,38,29,.26); }
.book-cover figcaption { margin-top: 16px; padding: 12px 15px; border-radius: 12px; background: rgba(246,245,235,.94); color: #52685b; font-size: .75rem; line-height: 1.7; }
.book-section { padding: 38px 0 50px; scroll-margin-top: 20px; }
.book-section-heading { max-width: 760px; margin-bottom: 24px; padding: 24px 28px; border-radius: 20px; background: rgba(246,245,235,.94); }
.book-section h2, .book-reader-notes h2 { margin: 12px 0 15px; font: 600 clamp(2.3rem, 4.5vw, 3.6rem)/1.08 var(--display); letter-spacing: -.06em; }
.book-section-heading p { margin-bottom: 0; color: #526b5c; font-size: .94rem; line-height: 1.75; }
.book-chapters { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; }
.book-chapters article { padding: 28px; border: 1px solid rgba(24,57,47,.12); border-radius: 20px; background: rgba(250,250,241,.96); }
.book-chapter-label { color: #627446; font-size: .72rem; font-weight: 700; letter-spacing: .12em; }
.book-chapters h3 { margin: 12px 0; font: 600 2rem/1.15 var(--display); letter-spacing: -.04em; }
.book-chapters p, .book-reader-notes p { color: #526b5c; font-size: .9rem; line-height: 1.8; }
.book-links { display: flex; flex-wrap: wrap; gap: 12px 20px; margin-top: 20px; }
.book-links a, .book-scenes a { color: #31573f; text-underline-offset: 4px; }
.book-links a { font-size: .84rem; font-weight: 700; }
.book-chapters .book-planning { grid-column: 1 / -1; background: #e8efdc; }
.book-scenes { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 16px; }
.book-scenes figure { margin: 0; overflow: hidden; border: 1px solid rgba(24,57,47,.1); border-radius: 18px; background: #f6f5eb; }
.book-scenes img { display: block; width: 100%; height: auto; aspect-ratio: 4/3; object-fit: cover; }
.book-scenes figcaption { padding: 18px; color: #536b5c; font-size: .75rem; line-height: 1.8; }
.book-scenes strong { display: block; margin-bottom: 9px; color: var(--ink); font: 600 1.15rem/1.4 var(--display); }
.book-reader-notes { display: grid; grid-template-columns: minmax(0,1.5fr) minmax(0,1fr); gap: 36px; margin: 10px 0 70px; padding: 32px; border-radius: 23px; background: #e1ebd3; }
.book-reader-notes h2 { font-size: clamp(2rem, 3.2vw, 2.8rem); }
.book-share { padding: 25px; border-radius: 17px; background: #f6f5eb; align-self: center; }
.book-share h3 { margin: 0; font: 600 1.4rem/1.3 var(--display); }
.book-share-status { min-height: 1.8em; margin-bottom: 0; }
.book-share label { display: block; margin: 8px 0; font-size: .8rem; }
.book-share input { width: 100%; padding: 10px; border: 1px solid #718774; border-radius: 8px; color: var(--ink); background: white; font: inherit; font-size: .8rem; }
.book-share [hidden] { display: none; }
@media (max-width: 800px) {
  .book-hero { gap: 30px; grid-template-columns: 1fr 1fr; }
  .book-hero-copy { padding: 23px; }
  .book-hero h1 { font-size: clamp(3.7rem, 8vw, 5rem); }
  .book-scenes { grid-template-columns: 1fr; }
  .book-scenes figure { display: grid; grid-template-columns: 1fr 1fr; align-items: center; }
  .book-reader-notes { grid-template-columns: 1fr; gap: 20px; }
}
@media (max-width: 600px) {
  .book-hero { grid-template-columns: 1fr; padding-top: 8px; padding-bottom: 25px; }
  .book-hero h1 { font-size: clamp(3.6rem, 16vw, 5.5rem); }
  .book-cover { width: min(100%, 350px); justify-self: center; }
  .book-chapters { grid-template-columns: 1fr; }
  .book-chapters article, .book-section-heading { padding: 23px; }
  .book-scenes figure { display: block; }
  .book-reader-notes { padding: 23px; margin-bottom: 40px; }
  .book-share { padding: 20px; }
  .book-download { width: 100%; padding: 15px; font-size: .85rem; }
}