.book-section { margin: 14px 22px 0; padding-top: 12px; border-top: 1px solid var(--line, var(--rule)); color: var(--ink); }
.book-section .book-heading { margin: 0 0 6px; font: 600 10.5px/1.4 "Segoe UI", system-ui, sans-serif; text-transform: uppercase; letter-spacing: .14em; color: var(--ink-faint, var(--muted)); }
.book-section p { margin: 0; }
.book-disclosure { font: 400 12px/1.5 "Segoe UI", system-ui, sans-serif; color: var(--ink-dim, var(--muted)); margin-bottom: 8px !important; }
.book-card { display: flex; align-items: center; gap: 4px; margin-bottom: 4px; }
.book-preview { display: flex; align-items: center; gap: 10px; min-width: 0; flex: 1; color: inherit; text-decoration: none; border-radius: 3px; }
.book-preview:hover { background: var(--atlas-hover, var(--surface)); }
.book-cover { position: relative; width: 40px; height: 56px; flex: 0 0 40px; display: grid; place-items: center; background: var(--atlas-surface-nav, var(--surface)); border-radius: 2px; overflow: hidden; }
.book-cover-placeholder { font-size: 28px; color: var(--ink-dim, var(--muted)); }
.book-cover img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; background: var(--panel-bg, var(--surface)); }
.book-copy { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.book-title { font: 600 13px/1.35 "Segoe UI", system-ui, sans-serif; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.book-note { display: block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font: 400 12px/1.5 "Segoe UI", system-ui, sans-serif; color: var(--ink-dim, var(--muted)); }
.book-source { flex: 0 0 24px; display: grid; place-items: center; min-height: 44px; font-size: 14px; color: var(--ink-dim, var(--muted)); text-decoration: none; }
.book-browse { display: inline-flex; align-items: center; min-height: 44px; color: var(--accent, var(--rust)); font-size: 12px; }
.book-preview:focus-visible, .book-source:focus-visible, .book-more summary:focus-visible { outline: 2px solid var(--accent, var(--rust)); outline-offset: 3px; }
.book-more summary { min-height: 28px; padding: 5px 0; cursor: pointer; color: var(--accent, var(--rust)); font-size: 12px; }
.reader .book-section { margin: 18px 0 0; }
@media (max-width: 720px) { #panel-books { margin-left: 20px; margin-right: 20px; } .book-source { flex-basis: 44px; } .book-more summary { min-height: 44px; } }