.chapterMenu{z-index:8;background:var(--card);border:1px solid var(--line);box-shadow:0 18px 35px var(--shadow,#2a241929);position:absolute;top:100%;left:-1px;right:-1px}.chapterMenu .chapterGrid{box-shadow:none;border:0;position:static}.bookTabs{background:var(--line);grid-template-columns:repeat(3,1fr);gap:1px;padding:1px;display:grid}.bookTabs button{background:var(--card);text-align:left;color:var(--muted);border:0;padding:12px 18px}.bookTabs button:hover,.bookTabs button:focus-visible{background:var(--soft);color:var(--ink);outline:none}.bookTabs button.activeBook{background:var(--ink);color:var(--card)}.bookTabs button.activeBook small{color:inherit;opacity:.78}.bookTabs b,.bookTabs small{display:block}.bookTabs b{font:400 17px Georgia,serif}.bookTabs small{margin-top:3px;font-size:9px}@media (max-width:520px){.bookTabs button{padding:10px 12px}.chapterMenu .chapterGrid{grid-template-columns:repeat(4,1fr)}}.chapterMenu{z-index:15;overscroll-behavior:contain;scrollbar-gutter:stable;border-radius:0 0 8px 8px;max-height:min(520px,60dvh);overflow:auto}.chapterMenuHead{z-index:1;background:var(--card);border-bottom:1px solid var(--line);align-items:end;gap:16px;padding:16px;display:flex;position:sticky;top:0}.chapterMenuHead label{min-width:0;color:var(--muted);flex:1;gap:7px;font-size:11px;display:grid}.chapterMenuHead select{border:1px solid var(--line);background:var(--card);width:100%;min-height:44px;color:var(--ink);font:inherit;border-radius:4px;padding:10px 12px;font-size:16px}.chapterMenuClose{border:1px solid var(--line);background:var(--card);min-height:44px;color:var(--blue);border-radius:4px;padding:0 12px;font-size:12px}.chapterMenuLabel{color:var(--muted);margin:0;padding:14px 16px 10px;font-size:12px}.chapterMenu .chapterGrid{border:1px solid var(--line);grid-template-columns:repeat(auto-fit,minmax(88px,1fr));margin:0 12px 12px;padding:1px}.chapterMenu .chapterGrid button{min-height:90px;padding:10px 4px}.chapterMenu .chapterGrid .currentChapter{box-shadow:inset 0 0 0 2px var(--blue);color:var(--blue)}.chapterPicker{grid-template-columns:minmax(0,1fr) auto 14px;gap:12px;min-height:52px;padding:12px 16px}.chapterPicker>span{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.chapterPicker svg{transition:transform .16s;display:block}.chapterPicker:focus-visible,.chapterMenu button:focus-visible,.chapterMenu select:focus-visible{outline:2px solid var(--blue);outline-offset:-3px}@media (max-width:520px){.chapterMenu{max-height:60dvh}.chapterMenuHead{gap:8px;padding:12px}.chapterMenu .chapterGrid{grid-template-columns:repeat(3,minmax(0,1fr));margin:0 10px 10px}.chapterPicker{gap:8px;padding:12px 10px}.chapterPicker b{font-size:14px}.chapterPicker>span:last-child{text-align:left;display:block}}