/* CCAA 163 - Only the 2026 horizontal-PDF collection viewer. */
.book163 .book109-hero-book{width:min(100%,380px)}
.book163 .book109-cover-mat img{aspect-ratio:421/595;object-fit:contain}
.book163 .book109-spread{grid-template-columns:54px minmax(0,1fr) 54px;gap:8px}
.book163 .book109-page-figure{max-width:880px}
.book163 .book109-page-click{max-width:880px}
.book163 .book109-page-click>img{aspect-ratio:auto;max-height:none;object-fit:contain;height:auto}
.book163 .book109-thumbs .book109-thumb{width:110px}
.book163 .book109-thumbs .book109-thumb img{width:94px;height:74px;object-fit:contain}
.book163 .book109-zoom-scroll img{width:calc(min(90vw,1000px) * var(--book109-zoom,1))}
.book163 .book109-section-aside span{white-space:normal}
.book163 .book109-reader-bottom span{letter-spacing:normal;text-align:right;max-width:490px}
@media(max-width:700px){
  .book163 .book109-hero-book{width:min(82%,340px)}
  .book163 .book109-spread{display:block}
  .book163 .book109-reader{padding:15px 12px 18px}
  .book163 .book109-page-click{width:100%;max-width:100%}
  .book163 .book109-page-click>img{width:100%;height:auto;max-height:none}
  .book163 .book109-thumb{width:91px}
  .book163 .book109-thumbs .book109-thumb img{width:75px;height:58px}
  .book163 .book109-reader-bottom span{max-width:none;text-align:left}
  .book163 .book109-zoom-scroll img{width:calc(min(90vw,900px) * var(--book109-zoom,1))}
}