.lecture-document-view_focusTarget__2cJ_5{scroll-margin-top:calc(var(--library-header-top) + var(--space-4))}.lecture-document-view_stage__Npg69{display:grid;grid-template-columns:minmax(0,1fr) clamp(320px,25vw,400px);grid-gap:clamp(var(--space-4),1.6vw,var(--space-6));gap:clamp(var(--space-4),1.6vw,var(--space-6));align-items:start}.lecture-document-view_main__f_heE{display:grid;align-content:start;grid-gap:var(--space-4);gap:var(--space-4);min-width:0}.lecture-document-view_docHeader___w1w2,.lecture-document-view_documentReader__ZvqA4{min-width:0}.lecture-document-view_headerActions__Vy0JH{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:var(--space-2)}.lecture-document-view_panel__magY3{position:-webkit-sticky;position:sticky;top:calc(var(--library-header-top) + var(--space-4));height:min(780px,calc(100dvh - var(--library-header-h) - var(--space-4) * 2));min-height:420px;min-width:0}@media (min-width:1101px){.lecture-document-view_frame__9a8ii[data-focus] .lecture-document-view_stage__Npg69{grid-template-columns:minmax(0,1fr)}.lecture-document-view_frame__9a8ii[data-focus] .lecture-document-view_panel__magY3{display:none}}@media (max-width:1100px){.lecture-document-view_stage__Npg69{grid-template-columns:minmax(0,1fr)}.lecture-document-view_panel__magY3{position:static;height:auto;min-height:0}.lecture-document-view_focusToggle__OPkA3{display:none}}.lecture-document-view_pdfViewer__ZsgBa{display:block;width:100%;height:min(76vh,940px);border:1px solid var(--border-default);border-radius:var(--radius-lg);background:var(--exam-paper)}.lecture-document-view_imageViewer__MNL3G{display:grid;place-items:center;min-height:440px;overflow:auto;border:1px solid var(--border-default);border-radius:var(--radius-lg);padding:var(--space-5);background:var(--surface-page)}.lecture-document-view_imageViewer__MNL3G img{display:block;max-width:100%;height:auto;border-radius:var(--radius-sm);box-shadow:0 14px 34px var(--shadow-color)}.lecture-document-view_docxViewer__h818l,.lecture-document-view_richTextViewer__wzPXe{overflow:hidden;border:1px solid var(--border-default);border-radius:var(--radius-lg);background:var(--exam-paper);box-shadow:0 18px 52px var(--shadow-color);color:var(--exam-ink)}.lecture-document-view_docxViewer__h818l header,.lecture-document-view_richTextViewer__wzPXe>header{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-4) var(--space-5);border-bottom:1px solid var(--border-strong);background:var(--surface-raised);color:var(--exam-ink-2)}.lecture-document-view_docxViewer__h818l header svg,.lecture-document-view_richTextViewer__wzPXe>header svg{color:var(--accent-2)}.lecture-document-view_docxViewer__h818l header div,.lecture-document-view_richTextViewer__wzPXe>header div{display:grid;grid-gap:2px;gap:2px}.lecture-document-view_docxViewer__h818l header span,.lecture-document-view_richTextViewer__wzPXe>header span{color:var(--text-muted);font:var(--fs-xs) var(--font-ui)}.lecture-document-view_docxViewer__h818l pre{min-height:480px;margin:0;overflow:auto;padding:clamp(22px,5vw,54px);color:var(--exam-ink);font:var(--fs-base)/1.7 var(--font-ui);white-space:pre-wrap}.lecture-document-view_richTextViewer__wzPXe>div{min-height:480px;padding:clamp(22px,5vw,var(--space-10));font:var(--doc-body)/var(--doc-lh) var(--font-doc)}.lecture-document-view_richTextViewer__wzPXe h2,.lecture-document-view_richTextViewer__wzPXe h3{color:var(--exam-ink);line-height:1.25}.lecture-document-view_richTextViewer__wzPXe h2{font-size:var(--doc-h2)}.lecture-document-view_richTextViewer__wzPXe h3{font-size:var(--doc-h3)}.lecture-document-view_richTextViewer__wzPXe p{margin:0 0 1em}.lecture-document-view_richTextViewer__wzPXe ol,.lecture-document-view_richTextViewer__wzPXe ul{padding-left:1.6em}.lecture-document-view_richTextViewer__wzPXe blockquote{margin:1em 0;border-left:4px solid var(--accent-2);padding-left:var(--space-3);color:var(--exam-ink-2)}.lecture-document-view_richTextViewer__wzPXe a{color:var(--brand)}.lecture-document-view_lectureBreadcrumbLink__ChggQ{text-decoration:none}.lecture-document-view_selectionBar__rQZaW{position:fixed;left:50%;bottom:var(--space-5);z-index:var(--z-dropdown);display:flex;align-items:center;gap:6px;width:max-content;max-width:min(680px,calc(100vw - 24px));box-sizing:border-box;border:1px solid var(--border-strong);border-radius:var(--radius-full);padding:6px 6px 6px 14px;background:var(--surface-raised);box-shadow:0 16px 36px var(--shadow-color);transform:translateX(-50%)}.lecture-document-view_selectionBar__rQZaW>svg{flex:0 0 auto;color:var(--domain)}.lecture-document-view_selectionBar__rQZaW q{flex:1 1 auto;min-width:0;overflow:hidden;color:var(--text-primary);font:650 var(--fs-sm) var(--font-ui);text-overflow:ellipsis;white-space:nowrap}.lecture-document-view_selectionBar__rQZaW button{flex:0 0 auto;display:inline-flex;align-items:center;gap:5px;min-height:var(--control-h-sm);border:1px solid var(--border-strong);border-radius:var(--radius-full);padding:0 .85em;background:var(--surface-page);color:var(--text-primary);font:700 var(--fs-btn) var(--font-ui);cursor:pointer;white-space:nowrap}.lecture-document-view_selectionBar__rQZaW button:focus-visible{outline:2px solid var(--brand);outline-offset:2px}.lecture-document-view_selectionBar__rQZaW button:disabled{cursor:progress;opacity:.7}.lecture-document-view_selectionBar__rQZaW .lecture-document-view_selectionPrimary__Y0WuA{border-color:transparent;background:var(--domain-soft);color:var(--domain-on-soft)}.lecture-document-view_selectionBar__rQZaW .lecture-document-view_selectionClose__zO9jk{width:var(--control-h-sm);justify-content:center;padding:0}@media (max-width:900px){.lecture-document-view_pdfViewer__ZsgBa{height:68vh;border-radius:var(--radius-md)}.lecture-document-view_imageViewer__MNL3G{min-height:280px;padding:var(--space-3)}.lecture-document-view_docxViewer__h818l pre,.lecture-document-view_richTextViewer__wzPXe>div{min-height:360px;padding:var(--space-5)}}@media (max-width:560px){.lecture-document-view_selectionBar__rQZaW{flex-wrap:wrap;border-radius:var(--radius-md)}}@media (max-width:900px){.lecture-document-view_selectionBar__rQZaW{bottom:calc(var(--library-header-bottom) + var(--space-2))}.lecture-document-view_selectionBar__rQZaW q{flex-basis:calc(100% - 60px);white-space:normal}}.lecture-study-panel_root__g5HmL{display:flex;flex-direction:column;height:100%;min-height:0;overflow:hidden;box-sizing:border-box;border:1px solid var(--border-default);border-radius:var(--radius-lg);background:var(--surface-page)}.lecture-study-panel_tabs__PtGo3{display:grid;flex:0 0 auto;grid-auto-columns:minmax(0,1fr);grid-auto-flow:column;grid-gap:2px;gap:2px;border-bottom:1px solid var(--border-default);padding:var(--space-1);background:var(--surface-inset)}.lecture-study-panel_tab__fXdF2{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-width:0;min-height:var(--control-h-sm);border:0;border-radius:var(--radius-sm);padding:0 .4em;background:transparent;color:var(--text-secondary);font:700 var(--fs-btn) var(--font-ui);white-space:nowrap;cursor:pointer;transition:color .16s ease,background .16s ease}.lecture-study-panel_tab__fXdF2:hover{background:var(--surface-sunken);color:var(--text-primary)}.lecture-study-panel_tab__fXdF2[aria-selected=true]{background:var(--domain-soft);color:var(--domain-on-soft)}.lecture-study-panel_tabIndicator__SN4kX{border-radius:var(--radius-sm);background:var(--domain-soft)}.lecture-study-panel_tab__fXdF2:focus-visible{outline:2px solid var(--brand);outline-offset:-2px}.lecture-study-panel_tab__fXdF2 em{min-width:1.5em;border-radius:var(--radius-full);padding:1px 5px;background:var(--surface-page);color:inherit;font:800 var(--fs-3xs) var(--font-ui);font-style:normal;text-align:center}.lecture-study-panel_body__smCdo{flex:1 1 auto;min-height:0;overflow-y:auto;overscroll-behavior:contain;padding:var(--space-3)}.lecture-study-panel_body__smCdo[hidden]{display:none}.lecture-study-panel_stack__joyf8{display:grid;align-content:start;grid-gap:var(--space-3);gap:var(--space-3);min-width:0}.lecture-study-panel_chapters__YQxMu{display:grid;grid-gap:2px;gap:2px;margin:0;padding:0;list-style:none}.lecture-study-panel_chapter__k6MFR{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;grid-gap:var(--space-2);gap:var(--space-2);width:100%;border:0;border-radius:var(--radius-sm);padding:var(--space-2);background:transparent;color:var(--text-primary);text-align:left;cursor:pointer}.lecture-study-panel_chapter__k6MFR:hover{background:var(--surface-raised)}.lecture-study-panel_chapter__k6MFR:focus-visible{outline:2px solid var(--brand);outline-offset:-2px}.lecture-study-panel_chapterIndex__IAxEq{display:grid;place-items:center;width:max(23px,1.8em);height:max(23px,1.8em);border-radius:50%;background:var(--surface-sunken);color:var(--text-secondary);font-size:var(--fs-btn)}.lecture-study-panel_chapter__k6MFR strong{display:-webkit-box;overflow:hidden;font:650 var(--fs-btn)/1.35 var(--font-ui);-webkit-box-orient:vertical;-webkit-line-clamp:2}.lecture-study-panel_chapter__k6MFR small{color:var(--text-muted);font:700 var(--fs-2xs) var(--font-ui);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.lecture-study-panel_activeChapter__b9kmO,.lecture-study-panel_activeChapter__b9kmO:hover{background:var(--domain-soft)}.lecture-study-panel_activeChapter__b9kmO .lecture-study-panel_chapterIndex__IAxEq{background:var(--domain);color:var(--domain-ink)}.lecture-study-panel_composer__A2CZq{display:grid;grid-gap:var(--space-2);gap:var(--space-2);border:1px solid var(--border-default);border-radius:var(--radius-md);padding:var(--space-2);background:var(--surface-inset);transition:border-color .16s ease}.lecture-study-panel_composer__A2CZq:focus-within{border-color:var(--domain);outline:2px solid var(--brand);outline-offset:2px;box-shadow:0 0 0 3px var(--focus-ring)}.lecture-study-panel_composer__A2CZq textarea{box-sizing:border-box;width:100%;min-height:84px;border:0;padding:var(--space-1);background:transparent;color:var(--text-primary);font:500 var(--fs-sm)/1.5 var(--font-ui);resize:vertical}.lecture-study-panel_composer__A2CZq textarea::placeholder{color:var(--text-muted)}.lecture-study-panel_composer__A2CZq textarea:focus-visible{outline:none}.lecture-study-panel_composerBar__9GvTk{display:flex;flex-wrap:wrap;align-items:center;gap:6px}.lecture-study-panel_composerBar__9GvTk>.lecture-study-panel_submit__XQIIr{margin-left:auto}.lecture-study-panel_stampEmpty__nFWpD,.lecture-study-panel_stamp__MxY19{display:inline-flex;align-items:center;min-height:30px;border-radius:var(--radius-full);font:700 var(--fs-2xs) var(--font-ui);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.lecture-study-panel_stamp__MxY19{border:1px solid var(--border-strong);background:var(--surface-page)}.lecture-study-panel_stampEmpty__nFWpD,.lecture-study-panel_stamp__MxY19 button{display:inline-flex;align-items:center;gap:var(--space-1);min-height:28px;border:0;padding:0 var(--space-2);background:transparent;color:var(--text-primary);font:inherit;cursor:pointer;white-space:nowrap}.lecture-study-panel_stamp__MxY19 button+button{padding-inline:6px var(--space-2);color:var(--text-muted)}.lecture-study-panel_stampEmpty__nFWpD{border:1px dashed var(--border-strong);color:var(--text-secondary);white-space:nowrap}.lecture-study-panel_stampEmpty__nFWpD:focus-visible,.lecture-study-panel_stamp__MxY19 button:focus-visible{outline:2px solid var(--brand);outline-offset:1px;border-radius:var(--radius-full)}.lecture-study-panel_check__WzyfU{display:inline-flex;align-items:center;gap:5px;color:var(--text-muted);font:600 var(--fs-2xs) var(--font-ui);cursor:pointer}.lecture-study-panel_check__WzyfU input{accent-color:var(--domain)}.lecture-study-panel_submit__XQIIr{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:34px;border:0;border-radius:var(--radius-sm);padding:0 .9em;background:var(--domain);color:var(--domain-ink);font:750 var(--fs-btn) var(--font-ui);cursor:pointer;transition:filter var(--hover-dur,.16s) ease;white-space:nowrap}.lecture-study-panel_submit__XQIIr:hover:not(:disabled){filter:brightness(var(--hover-bright,1.08))}.lecture-study-panel_submit__XQIIr:focus-visible{outline:2px solid var(--brand);outline-offset:2px}.lecture-study-panel_submit__XQIIr:disabled{cursor:not-allowed;opacity:.5}.lecture-study-panel_bar__0XzRv{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:var(--space-1) 6px;color:var(--text-muted);font:650 var(--fs-2xs) var(--font-ui)}.lecture-study-panel_barActions__AW3Z0{display:inline-flex;flex-wrap:wrap;gap:2px}.lecture-study-panel_inlineLink__MvJA2,.lecture-study-panel_textButton__LBJfh{display:inline-flex;align-items:center;gap:5px;min-height:2.3em;border:0;border-radius:var(--radius-sm);padding:0 .6em;background:transparent;color:var(--text-secondary);font:700 var(--fs-btn) var(--font-ui);cursor:pointer;white-space:nowrap}.lecture-study-panel_textButton__LBJfh:hover:not(:disabled){background:var(--surface-raised);color:var(--text-primary)}.lecture-study-panel_inlineLink__MvJA2:focus-visible,.lecture-study-panel_textButton__LBJfh:focus-visible{outline:2px solid var(--brand);outline-offset:1px}.lecture-study-panel_textButton__LBJfh:disabled{cursor:not-allowed;opacity:.45}.lecture-study-panel_inlineLink__MvJA2{min-height:0;padding:0;color:var(--domain);text-decoration:underline;white-space:nowrap}.lecture-study-panel_list__uLVxR{display:grid;grid-gap:6px;gap:6px;margin:0;padding:0;list-style:none}.lecture-study-panel_item__xVekX{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:start;grid-gap:var(--space-2);gap:var(--space-2);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:var(--space-2) 6px var(--space-2) var(--space-2);background:var(--surface-page);transition:border-color .16s ease}.lecture-study-panel_item__xVekX:hover{border-color:var(--border-strong)}.lecture-study-panel_itemPlain__ODjrV{grid-template-columns:minmax(0,1fr) auto}.lecture-study-panel_timeChip__1BwB0{min-width:3.4em;border:0;border-radius:var(--radius-sm);padding:3px 6px;background:var(--domain-soft);color:var(--domain-on-soft);font:750 var(--fs-2xs) var(--font-ui);font-feature-settings:"tnum";font-variant-numeric:tabular-nums;text-align:center;cursor:pointer;white-space:nowrap}button.lecture-study-panel_timeChip__1BwB0:hover{filter:brightness(var(--hover-bright,1.08))}.lecture-study-panel_timeChip__1BwB0:focus-visible{outline:2px solid var(--brand);outline-offset:1px}.lecture-study-panel_timeChipMuted__Qfw1h{background:var(--surface-sunken);color:var(--text-muted);cursor:default}.lecture-study-panel_itemText__4CnGZ{display:grid;grid-gap:2px;gap:2px;min-width:0}.lecture-study-panel_itemText__4CnGZ p{margin:0;color:var(--text-primary);font:500 var(--fs-sm)/1.5 var(--font-ui);overflow-wrap:anywhere;white-space:pre-wrap}.lecture-study-panel_itemText__4CnGZ b{color:var(--text-primary);font:750 var(--fs-sm)/1.4 var(--font-ui);overflow-wrap:anywhere}.lecture-study-panel_itemText__4CnGZ b i{color:var(--text-muted);font-weight:600}.lecture-study-panel_itemText__4CnGZ span{color:var(--text-secondary);font:600 var(--fs-xs)/1.45 var(--font-ui)}.lecture-study-panel_itemText__4CnGZ q{color:var(--text-muted);font:italic var(--fs-xs)/1.45 var(--font-ui)}.lecture-study-panel_itemActions__MhIDp{display:inline-flex;gap:2px}.lecture-study-panel_iconButton__AAu7F,.lecture-study-panel_itemActions__MhIDp button{display:inline-grid;place-items:center;width:30px;height:30px;border:1px solid transparent;border-radius:var(--radius-sm);padding:0;background:transparent;color:var(--text-muted);cursor:pointer;transition:color .16s ease,background .16s ease,border-color .16s ease;white-space:nowrap}.lecture-study-panel_iconButton__AAu7F:hover:not(:disabled),.lecture-study-panel_itemActions__MhIDp button:hover{border-color:var(--border-strong);background:var(--surface-raised);color:var(--text-primary)}.lecture-study-panel_iconButton__AAu7F:focus-visible,.lecture-study-panel_itemActions__MhIDp button:focus-visible{outline:2px solid var(--brand);outline-offset:1px}.lecture-study-panel_itemActions__MhIDp .lecture-study-panel_copied__XP_xG,.lecture-study-panel_itemActions__MhIDp .lecture-study-panel_copied__XP_xG:hover{color:var(--state-success)}.lecture-study-panel_itemActions__MhIDp .lecture-study-panel_danger__qJx_5:hover{color:var(--state-danger-fg)}.lecture-study-panel_editForm__qbA3v{display:grid;grid-gap:6px;gap:6px}.lecture-study-panel_editForm__qbA3v textarea{box-sizing:border-box;width:100%;min-height:80px;border:1px solid var(--domain);border-radius:var(--radius-sm);padding:6px var(--space-2);background:var(--surface-page);color:var(--text-primary);font:500 var(--fs-sm)/1.5 var(--font-ui);resize:vertical}.lecture-study-panel_editForm__qbA3v textarea:focus-visible{outline:2px solid var(--brand);outline-offset:2px;box-shadow:0 0 0 3px var(--focus-ring)}.lecture-study-panel_editForm__qbA3v>div{display:flex;justify-content:flex-end;gap:var(--space-1)}.lecture-study-panel_empty__NwcLN{margin:0;border:1px dashed var(--border-default);border-radius:var(--radius-sm);padding:var(--space-3);color:var(--text-muted);font:600 var(--fs-xs)/1.5 var(--font-ui);text-align:center}.lecture-study-panel_segment__Pemuj{display:inline-flex;justify-self:start;gap:2px;border:1px solid var(--border-default);border-radius:var(--radius-sm);padding:2px;background:var(--surface-page)}.lecture-study-panel_segment__Pemuj button{min-height:2.3em;border:0;border-radius:var(--radius-sm);padding:0 .75em;background:transparent;color:var(--text-secondary);font:700 var(--fs-btn) var(--font-ui);cursor:pointer;white-space:nowrap}.lecture-study-panel_segment__Pemuj button[aria-pressed=true]{background:var(--domain-soft);color:var(--domain-on-soft)}.lecture-study-panel_segmentIndicator__wrIIL{border-radius:var(--radius-sm);background:var(--domain-soft)}.lecture-study-panel_segment__Pemuj button:focus-visible{outline:2px solid var(--brand);outline-offset:-1px}.lecture-study-panel_fields__Q5_x_{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:6px;gap:6px}.lecture-study-panel_fields__Q5_x_ .lecture-study-panel_wide__gIcof{grid-column:1/-1}.lecture-study-panel_bulkInput__GDk42,.lecture-study-panel_fields__Q5_x_ input,.lecture-study-panel_select__bpkkQ{box-sizing:border-box;width:100%;min-width:0;min-height:36px;border:1px solid var(--border-default);border-radius:var(--radius-sm);padding:0 10px;background:var(--surface-page);color:var(--text-primary);font:600 var(--fs-sm) var(--font-ui)}.lecture-study-panel_bulkInput__GDk42{min-height:116px;padding:var(--space-2) 10px;font-weight:500;line-height:1.5;resize:vertical}.lecture-study-panel_bulkInput__GDk42::placeholder,.lecture-study-panel_fields__Q5_x_ input::placeholder{color:var(--text-muted)}.lecture-study-panel_bulkInput__GDk42:focus-visible,.lecture-study-panel_fields__Q5_x_ input:focus-visible,.lecture-study-panel_select__bpkkQ:focus-visible{border-color:var(--domain);outline:2px solid var(--brand);outline-offset:2px;box-shadow:0 0 0 3px var(--focus-ring)}.lecture-study-panel_hint__Kc5Wt{margin:0;color:var(--text-muted);font:600 var(--fs-xs)/1.55 var(--font-ui)}.lecture-study-panel_hint__Kc5Wt code,.lecture-study-panel_preview__7bTYl code{border-radius:var(--radius-xs);padding:0 var(--space-1);background:var(--surface-sunken);color:var(--text-secondary);font-size:.95em;overflow-wrap:anywhere}.lecture-study-panel_preview__7bTYl{display:grid;grid-gap:var(--space-1);gap:var(--space-1);border:1px dashed var(--border-strong);border-radius:var(--radius-sm);padding:var(--space-2) 10px}.lecture-study-panel_preview__7bTYl p{margin:0;color:var(--text-secondary);font:650 var(--fs-xs) var(--font-ui)}.lecture-study-panel_preview__7bTYl ul{display:grid;grid-gap:2px;gap:2px;margin:0;padding-left:1.1em;color:var(--text-secondary);font:500 var(--fs-xs)/1.45 var(--font-ui)}.lecture-study-panel_preview__7bTYl .lecture-study-panel_invalid__SzO1z{color:var(--state-danger-fg)}.lecture-study-panel_savePanel__XOYPZ{display:grid;grid-gap:var(--space-2);gap:var(--space-2);border:1px solid var(--domain);border-radius:var(--radius-md);padding:var(--space-3);background:var(--surface-inset)}.lecture-study-panel_savePanel__XOYPZ header{display:flex;align-items:center;justify-content:space-between;gap:6px;color:var(--text-primary);font:750 var(--fs-sm) var(--font-ui)}.lecture-study-panel_label__a54dM{display:grid;grid-gap:var(--space-1);gap:var(--space-1);color:var(--text-muted);font:700 var(--fs-2xs) var(--font-ui)}.lecture-study-panel_error__dxFeW{margin:0;color:var(--state-danger-fg);font:650 var(--fs-xs)/1.45 var(--font-ui)}.lecture-study-panel_result__qZILC{margin:0;color:var(--state-success);font:650 var(--fs-xs)/1.45 var(--font-ui)}.lecture-study-panel_result__qZILC a{color:inherit;font-weight:750}@media (max-width:1100px){.lecture-study-panel_root__g5HmL{height:auto;overflow:visible}.lecture-study-panel_body__smCdo{overflow:visible}}@media (max-width:560px){.lecture-study-panel_iconButton__AAu7F,.lecture-study-panel_itemActions__MhIDp button{width:36px;height:36px}.lecture-study-panel_tab__fXdF2 svg{display:none}}