/* Page-image book reader (assets/book.js) */
.book-reader { margin: 16px 0; scroll-margin-top: 72px; }
.book-bar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; margin: 8px 0; }
.book-bar .btn { font-size: 15px; padding: 8px 14px; }
.book-bar .btn:disabled { opacity: .4; cursor: default; }
.book-go { display: flex; align-items: center; gap: 6px; font-size: 15px; }
.book-go input { width: 4.5em; padding: 6px; border: 1px solid var(--line); border-radius: 8px; font: inherit; text-align: center; }
.book-of, .book-count { color: var(--muted); font-size: 15px; }
.book-page { margin: 0; text-align: center; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 8px; min-height: 300px; }
.book-page img { display: block; margin: 0 auto; width: auto; max-width: 100%; cursor: pointer; user-select: none; -webkit-user-select: none; }
@media (max-width: 520px) {
  .book-go { order: 3; width: 100%; justify-content: center; }
  .book-page { padding: 2px; border-radius: 6px; }
}

/* PDF viewer (/pdf/, assets/pdf-view.js) */
.pdf-pages { overflow-x: auto; padding: 4px 0; background: var(--green-soft); border-radius: var(--radius); min-height: 60vh; }
.pdf-page { margin: 0 auto 10px; background: #fff; box-shadow: var(--shadow); max-width: none; }
.pdf-page canvas { display: block; width: 100%; height: 100%; }
.pdf-view .book-bar > span { display: flex; gap: 6px; flex-wrap: wrap; }