:root{--ground:#f6f6f3;--paper:#fff;--ink:#1b1f2a;--ink-2:#454a57;--muted:#6b7180;--rule:#e0e1dc;--rule-2:#cccec7;--marker:#ffe45c;--marker-soft:#ffe45c73;--blue:#2b4c9b;--blue-soft:#2b4c9b1a;--red:#b3402f;--green:#2e7d4f;--shadow:0 1px 2px #1b1f2a0f, 0 6px 20px #1b1f2a0f;--sans:"IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;--serif:"IBM Plex Serif", Georgia, "Times New Roman", serif;--mono:"IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;--radius:6px;--topbar:48px;--statusbar:32px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}:root[data-theme=dark]{--ground:#15171c;--paper:#1d2027;--ink:#e8e8e4;--ink-2:#c3c5c0;--muted:#8b9099;--rule:#2c303a;--rule-2:#3b404c;--marker:#e6c93a;--marker-soft:#e6c93a4d;--blue:#8fa9e8;--blue-soft:#8fa9e824;--red:#e07a6a;--green:#6fbf8f;--shadow:0 1px 2px #0006, 0 6px 20px #00000059;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}html{-webkit-text-size-adjust:100%;-moz-text-size-adjust:100%;text-size-adjust:100%}body{background:var(--ground);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased;font-size:14px;line-height:1.5}button,input,select,textarea{font:inherit;color:inherit}button{cursor:pointer;background:0 0;border:0;padding:0}button:disabled{cursor:default;opacity:.5}a{color:var(--blue)}:focus-visible{outline:2px solid var(--blue);outline-offset:2px}@media (prefers-reduced-motion:reduce){*,:before,:after{transition:none!important;animation:none!important}}::selection{background:var(--marker-soft)}.mono{font-family:var(--mono);font-size:12px}.muted{color:var(--muted)}.hidden{display:none!important}.btn{border-radius:var(--radius);border:1px solid var(--rule-2);background:var(--paper);color:var(--ink);white-space:nowrap;align-items:center;gap:6px;padding:5px 10px;font-size:13px;font-weight:500;line-height:1.2;display:inline-flex}.btn:hover:not(:disabled){border-color:var(--ink-2)}.btn.primary{background:var(--ink);color:var(--ground);border-color:var(--ink)}.btn.primary:hover:not(:disabled){background:var(--ink-2)}.btn.quiet{background:0 0;border-color:#0000}.btn.quiet:hover:not(:disabled){background:var(--blue-soft);border-color:#0000}.btn.danger{color:var(--red)}.btn.small{padding:3px 8px;font-size:12px}.btn.active{background:var(--marker-soft);border-color:var(--marker)}.input,.textarea,.select{border-radius:var(--radius);border:1px solid var(--rule-2);background:var(--paper);color:var(--ink);width:100%;padding:6px 9px}.input:focus,.textarea:focus,.select:focus{border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-soft);outline:none}.textarea{resize:vertical;min-height:60px;font-family:var(--sans)}.select{appearance:none;background-image:linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);background-position:calc(100% - 13px) 55%,calc(100% - 9px) 55%;background-repeat:no-repeat;background-size:4px 4px;width:auto;padding-right:26px}.chip{background:var(--blue-soft);color:var(--blue);border-radius:999px;align-items:center;gap:4px;padding:2px 8px;font-size:12px;font-weight:500;display:inline-flex}.chip.marker{background:var(--marker-soft);color:var(--ink)}.pill-row{flex-wrap:wrap;gap:6px;display:flex}.error{color:var(--red);border-radius:var(--radius);background:#b3402f14;border:1px solid #b3402f4d;padding:8px 10px;font-size:13px}.notice{color:var(--ink-2);background:var(--blue-soft);border-radius:var(--radius);padding:8px 10px;font-size:13px}.level{align-items:center;gap:8px;display:flex}.level input[type=range]{appearance:none;background:0 0;width:110px;height:14px}.level input[type=range]::-webkit-slider-runnable-track{background:linear-gradient(90deg, var(--marker) 0%, var(--blue) 100%);border-radius:3px;height:6px}.level input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;background:var(--paper);border:2px solid var(--ink);border-radius:50%;width:14px;height:14px;margin-top:-4px}.level input[type=range]::-moz-range-track{background:linear-gradient(90deg, var(--marker) 0%, var(--blue) 100%);border-radius:3px;height:6px}.level input[type=range]::-moz-range-thumb{background:var(--paper);border:2px solid var(--ink);border-radius:50%;width:12px;height:12px}.level .label{min-width:82px;font-size:12px;font-weight:500}.library{max-width:760px;margin:0 auto;padding:56px 24px 80px}.library h1{font-family:var(--serif);letter-spacing:-.01em;margin:0 0 6px;font-size:34px;font-weight:500}.library .tagline{color:var(--muted);margin:0 0 32px;font-size:15px}.library .tagline mark{background:var(--marker-soft);color:inherit;padding:0 3px}.intake{grid-template-columns:1fr 1fr;gap:14px;margin-bottom:36px;display:grid}.intake .card{background:var(--paper);border:1px solid var(--rule);border-radius:10px;flex-direction:column;gap:10px;padding:16px;display:flex}.intake .card h2{text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:0;font-size:13px;font-weight:600}.dropzone{border:1.5px dashed var(--rule-2);text-align:center;color:var(--muted);cursor:pointer;border-radius:8px;padding:22px 12px;transition:border-color .15s,background .15s}.dropzone:hover,.dropzone.over{border-color:var(--ink);background:var(--marker-soft);color:var(--ink)}.paper-list{flex-direction:column;gap:8px;display:flex}.paper-row{background:var(--paper);border:1px solid var(--rule);color:inherit;border-radius:8px;grid-template-columns:1fr auto;align-items:center;gap:10px;padding:12px 14px;text-decoration:none;display:grid}.paper-row:hover{border-color:var(--ink-2)}.paper-row .title{font-family:var(--serif);font-size:16px;font-weight:500}.paper-row .sub{color:var(--muted);margin-top:2px;font-size:12px}.paper-row .progress-row{flex-wrap:wrap;gap:4px;margin-top:8px;font-size:12px;display:flex}.paper-row .progress-row .chip{font-size:11.5px}.empty{border:1px dashed var(--rule-2);text-align:center;color:var(--muted);border-radius:8px;padding:32px}@media (max-width:640px){.intake{grid-template-columns:1fr}}:root[data-layout=desktop] .mobile-nav,:root[data-layout=desktop] .popover.sheet{display:none}.reader{grid-template-rows:var(--topbar) 1fr var(--statusbar);height:100%;display:grid}.topbar{border-bottom:1px solid var(--rule);background:var(--paper);align-items:center;gap:12px;padding:0 12px;display:flex}.topbar .brand{font-family:var(--serif);color:inherit;align-items:center;gap:8px;font-size:15px;font-weight:600;text-decoration:none;display:flex}.topbar .brand .mark{border:1.5px solid var(--ink);border-radius:2px;width:14px;height:18px;position:relative}.topbar .brand .mark:after{content:"";background:var(--marker);height:4px;position:absolute;top:6px;left:2px;right:2px}.topbar .title{min-width:0;font-family:var(--serif);white-space:nowrap;text-overflow:ellipsis;flex:1;font-size:15px;overflow:hidden}.topbar .title input{font-family:var(--serif);background:0 0;border:0;width:100%;padding:2px 0;font-size:15px}.topbar .controls{align-items:center;gap:8px;display:flex}.split{grid-template-columns:var(--left,50%) 6px 1fr;min-height:0;display:grid}.split.stacked{grid-template-rows:1fr 6px 1fr;grid-template-columns:1fr}.divider{background:var(--rule);cursor:col-resize;position:relative}.split.stacked .divider{cursor:row-resize}.divider:hover,.divider.dragging{background:var(--marker)}.statusbar{border-top:1px solid var(--rule);background:var(--paper);color:var(--muted);align-items:center;gap:14px;padding:0 12px;font-size:12px;display:flex}.statusbar .grow{flex:1}.statusbar kbd{font-family:var(--mono);border:1px solid var(--rule-2);color:var(--ink-2);border-bottom-width:2px;border-radius:3px;padding:0 4px;font-size:11px}.pdf-pane{background:var(--ground);grid-template-rows:auto 1fr;min-height:0;display:grid;position:relative}.pdf-toolbar{border-bottom:1px solid var(--rule);background:var(--paper);align-items:center;gap:8px;padding:6px 10px;font-size:12px;display:flex}.pdf-toolbar .page-input{text-align:center;width:44px;padding:3px 4px}.pdf-toolbar .grow{flex:1}.pdf-scroll{scroll-behavior:smooth;padding:16px 0 60vh;position:relative;overflow:auto}@media (prefers-reduced-motion:reduce){.pdf-scroll{scroll-behavior:auto}}.pdf-page-wrap{width:-moz-fit-content;width:fit-content;box-shadow:var(--shadow);background:#fff;margin:0 auto 14px;position:relative}.pdf-page-wrap.active-page{outline:3px solid var(--marker);outline-offset:-3px}.pdf-page-wrap .page-num{z-index:2;font-family:var(--mono);color:var(--muted);background:var(--paper);border:1px solid var(--rule);opacity:.85;pointer-events:none;border-radius:3px;padding:0 5px;font-size:10px;position:absolute;top:6px;right:8px}.pdf-placeholder{background:var(--paper)}.react-pdf__Page__textContent span::selection{background:var(--marker-soft)}:root[data-theme=dark] .react-pdf__Page__canvas{filter:invert(.92)hue-rotate(180deg)}.area-select{border:1.5px dashed var(--blue);background:var(--blue-soft);pointer-events:none;z-index:5;position:absolute}.pdf-hint{background:var(--ink);color:var(--ground);pointer-events:none;opacity:.92;border-radius:999px;padding:5px 10px;font-size:12px;position:absolute;bottom:10px;left:50%;transform:translate(-50%)}.section-hl.flash{animation:1.8s ease-out forwards hlfade}@keyframes hlfade{0%{opacity:1}60%{opacity:1}to{opacity:0}}.seg{border:1px solid var(--rule-2);border-radius:var(--radius);display:inline-flex;overflow:hidden}.seg button{color:var(--muted);background:var(--paper);padding:4px 10px;font-size:12px;font-weight:500}.seg button+button{border-left:1px solid var(--rule-2)}.seg button.on{background:var(--marker-soft);color:var(--ink)}.example{border-top:1px solid var(--rule);padding:10px 0 4px}.example:first-of-type{border-top:0;padding-top:0}.example .head{font-family:var(--serif);align-items:center;gap:8px;margin-bottom:4px;font-size:14.5px;display:flex}.section-hl{background:var(--marker-soft);pointer-events:none;z-index:1;border-left:4px solid var(--marker);transition:top .15s,height .15s;position:absolute;left:0;right:0}:root[data-theme=dark] .section-hl{background:#e6c93a2e}.hl{pointer-events:none;mix-blend-mode:multiply;border-radius:2px;position:absolute}:root[data-theme=dark] .hl{mix-blend-mode:screen;opacity:.5}.popover{z-index:30;background:var(--paper);border:1px solid var(--rule-2);box-shadow:var(--shadow);border-radius:8px;flex-wrap:wrap;gap:2px;max-width:320px;padding:6px;animation:.12s ease-out pop;display:flex;position:fixed}@keyframes pop{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}.popover .btn{border-color:#0000}.popover .btn:hover{background:var(--marker-soft)}.popover .sep{background:var(--rule);width:1px;margin:4px 2px}.find-box{align-items:center;gap:6px;display:flex}.find-results{z-index:15;background:var(--paper);border:1px solid var(--rule-2);width:300px;max-height:50%;box-shadow:var(--shadow);border-radius:8px;position:absolute;top:38px;right:10px;overflow:auto}.find-results button{text-align:left;border-bottom:1px solid var(--rule);width:100%;padding:6px 10px;font-size:12px;display:block}.find-results button:hover{background:var(--marker-soft)}.find-results mark{background:var(--marker-soft);color:inherit}.text-scroll{min-height:0;padding:20px 24px 60vh;overflow:hidden auto}.paper-text{max-width:720px;font-family:var(--serif);color:var(--ink);overflow-wrap:anywhere;margin:0 auto;font-size:15.5px;line-height:1.65}.paper-text .jump-flash{animation:1.8s ease-out jumpflash}@keyframes jumpflash{0%,50%{background:var(--marker-soft)}to{background:0 0}}.text-credit{max-width:720px;margin:24px auto 0;font-size:12px}.plain-article .page-mark{font-family:var(--mono);color:var(--muted);border-top:1px solid var(--rule);margin:24px 0 12px;padding-top:6px;font-size:11px}.plain-article .page-mark:first-child{border-top:0;margin-top:0}.plain-article p{margin:0 0 .8em}.plain-article h2{margin:1.6em 0 .5em;scroll-margin-top:12px;font-size:21px;font-weight:500}.plain-article h3{margin:1.3em 0 .4em;scroll-margin-top:12px;font-size:17px;font-weight:500}.plain-article .page-mark+h2,.plain-article .page-mark+h3{margin-top:.4em}.plain-article p.caption{font-family:var(--sans);color:var(--ink-2);background:var(--paper);border:1px solid var(--rule);border-radius:8px;margin:1em 0;padding:10px 12px;font-size:13px;line-height:1.5}.plain-article ul,.plain-article ol{margin:0 0 .85em;padding-left:1.4em}.plain-article li{margin-bottom:.3em}.ltx .ltx_title_document{margin:0 0 12px;font-size:26px;font-weight:500;line-height:1.25}.ltx .ltx_authors{font-family:var(--sans);color:var(--ink-2);margin-bottom:16px;font-size:13.5px}.ltx .ltx_authors .ltx_personname{color:var(--ink);font-weight:600}.ltx .ltx_authors .ltx_contact{color:var(--muted);margin-right:8px;display:inline-block}.ltx .ltx_author_notes,.ltx .ltx_role_affiliation{color:var(--muted);font-size:12.5px;display:block}.ltx .ltx_abstract{background:var(--paper);border:1px solid var(--rule);border-radius:8px;margin:16px 0 20px;padding:14px 16px}.ltx .ltx_abstract .ltx_title{font-family:var(--sans);letter-spacing:.07em;text-transform:uppercase;color:var(--muted);margin:0 0 6px;font-size:11.5px;font-weight:600}.ltx .ltx_keywords{color:var(--muted);font-size:13px}.ltx .ltx_title_section{margin:1.8em 0 .5em;scroll-margin-top:12px;font-size:21px;font-weight:500}.ltx .ltx_title_subsection{margin:1.4em 0 .4em;scroll-margin-top:12px;font-size:17.5px;font-weight:500}.ltx .ltx_title_subsubsection,.ltx .ltx_title_paragraph{margin:1.2em 0 .3em;scroll-margin-top:12px;font-size:15.5px;font-weight:600}.ltx .ltx_title_paragraph{margin-right:6px;display:inline}.ltx .ltx_tag{color:var(--muted)}.ltx .ltx_title .ltx_tag{color:var(--marker);-webkit-text-stroke:.5px var(--ink-2);margin-right:4px}.ltx .ltx_p{margin:0 0 .85em}.ltx .ltx_para{scroll-margin-top:12px}.ltx .ltx_font_italic{font-style:italic}.ltx .ltx_font_bold{font-weight:600}.ltx .ltx_font_typewriter{font-family:var(--mono);font-size:.9em}.ltx .ltx_font_smallcaps{font-variant:small-caps}.ltx a.ltx_ref,.ltx .ltx_cite a{color:var(--blue);text-decoration:none}.ltx .ltx_cite{font-family:var(--sans);font-size:.85em}.ltx .ltx_ref_tag{font-family:var(--sans);font-size:.9em}.ltx .ltx_equation,.ltx .ltx_equationgroup{border-collapse:collapse;max-width:100%;margin:.6em 0 1em;display:block;overflow:auto hidden}.ltx .ltx_equation>tbody,.ltx .ltx_equationgroup>tbody{width:100%;display:table}.ltx .ltx_equation td{vertical-align:middle;border:0;padding:4px}.ltx .ltx_eqn_cell{text-align:center}.ltx .ltx_eqn_eqno{text-align:right;width:3em;color:var(--muted);font-family:var(--sans);white-space:nowrap;font-size:13px}.ltx .ltx_eqn_pad{width:1em}.ltx math{font-size:1.05em}.ltx .ltx_Math{white-space:normal}.ltx .ltx_figure,.ltx .ltx_table,.ltx .ltx_float{background:var(--paper);border:1px solid var(--rule);border-radius:8px;margin:1.4em 0;padding:12px;overflow-x:auto}.ltx .ltx_figure img,.ltx .ltx_figure_panel{max-width:100%;height:auto;margin:0 auto;display:block}.ltx .ltx_flex_figure,.ltx .ltx_flex_cell{display:block}.ltx .ltx_caption{font-family:var(--sans);color:var(--ink-2);margin-top:10px;font-size:13px;line-height:1.5}.ltx .ltx_caption .ltx_tag{color:var(--ink);font-weight:600}:root[data-theme=dark] .ltx img{filter:invert(.92)hue-rotate(180deg)}.ltx .ltx_tabular{border-collapse:collapse;font-family:var(--sans);margin:.4em auto;font-size:13px}.ltx .ltx_tabular td,.ltx .ltx_tabular th{vertical-align:top;padding:4px 8px}.ltx .ltx_tabular .ltx_border_t,.ltx .ltx_tabular .ltx_border_tt{border-top:1px solid var(--rule-2)}.ltx .ltx_tabular .ltx_border_b,.ltx .ltx_tabular .ltx_border_bb{border-bottom:1px solid var(--rule-2)}.ltx .ltx_tabular .ltx_border_l{border-left:1px solid var(--rule-2)}.ltx .ltx_tabular .ltx_border_r{border-right:1px solid var(--rule-2)}.ltx .ltx_align_center{text-align:center}.ltx .ltx_align_right{text-align:right}.ltx .ltx_align_left{text-align:left}.ltx .ltx_itemize,.ltx .ltx_enumerate{margin:0 0 .85em;padding-left:1.4em}.ltx .ltx_item{margin-bottom:.3em}.ltx .ltx_item>.ltx_tag{display:none}.ltx .ltx_note_mark{font-family:var(--sans);color:var(--blue);vertical-align:super;font-size:.75em;line-height:0}.ltx .ltx_note_outer{display:none}.ltx .ltx_note:hover .ltx_note_outer,.ltx .ltx_note:focus-within .ltx_note_outer{font-family:var(--sans);color:var(--ink-2);background:var(--paper);border:1px solid var(--rule);border-radius:6px;margin:0 4px;padding:4px 8px;font-size:12.5px;display:inline}.ltx .ltx_note_outer .ltx_note_mark,.ltx .ltx_note_type{display:none}.ltx .ltx_bibliography .ltx_title{margin:1.8em 0 .5em;font-size:21px;font-weight:500}.ltx .ltx_biblist{font-size:13.5px;font-family:var(--sans);margin:0;padding:0;list-style:none}.ltx .ltx_bibitem{grid-template-columns:3.2em 1fr;gap:0 8px;margin-bottom:8px;scroll-margin-top:12px;display:grid}.ltx .ltx_bibitem .ltx_tag_bibitem{color:var(--muted);font-family:var(--mono);font-size:12px}.ltx .ltx_bibitem .ltx_bibblock{display:inline}.ltx .ltx_bibitem .ltx_bibblock+.ltx_bibblock:before{content:" "}.ltx .ltx_bibitem>.ltx_bibblock:first-of-type,.ltx .ltx_bibitem .ltx_bibblock:not(:first-of-type){grid-column:2}.ltx .ltx_appendix .ltx_title_appendix{margin:1.8em 0 .5em;font-size:21px;font-weight:500}.ltx .ltx_rule{border:0;border-top:1px solid var(--rule)}.ltx .ltx_theorem{border-left:3px solid var(--marker);background:var(--paper);margin:1em 0;padding:10px 14px}.ltx .ltx_theorem .ltx_title{font-family:var(--sans);margin:0 0 4px;font-size:14px;font-weight:600}.ltx .ltx_listing,.ltx .ltx_verbatim{font-family:var(--mono);background:var(--ground);border:1px solid var(--rule);white-space:pre;border-radius:6px;padding:10px;font-size:12.5px;overflow-x:auto}.ltx .ltx_ERROR,.ltx .ltx_missing{color:var(--red);font-family:var(--mono);font-size:.85em}.ltx .ltx_TOC,.ltx .ltx_page_logo,.ltx .ltx_dates{display:none}@media (max-width:700px){.text-scroll{padding:12px 12px 50vh}.paper-text{font-size:15px;line-height:1.6}.ltx .ltx_title_document{font-size:22px}.ltx .ltx_title_section{font-size:19px}.ltx .ltx_figure,.ltx .ltx_table,.ltx .ltx_float{padding:8px}.ltx .ltx_bibitem{grid-template-columns:2.6em 1fr}}.side{background:var(--ground);grid-template-rows:auto 1fr auto;min-width:0;min-height:0;display:grid}.pane-host{grid-template-rows:1fr;min-height:0;display:grid}.tabs{border-bottom:1px solid var(--rule);background:var(--paper);align-items:stretch;padding:0 6px;display:flex}.tabs button{color:var(--muted);border-bottom:2px solid #0000;align-items:center;gap:6px;margin-bottom:-1px;padding:10px 12px;font-weight:500;display:flex}.tabs button:hover{color:var(--ink)}.tabs button.active{color:var(--ink);border-bottom-color:var(--ink)}.tabs button kbd{font-family:var(--mono);color:var(--muted);font-size:10px}.tabs .grow{flex:1}.pane{min-height:0;padding:14px 16px 60px;overflow:auto}.pane-head{flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:12px;display:flex}.pane-head .grow{flex:1}.section-card{content-visibility:auto;contain-intrinsic-size:auto 320px;background:var(--paper);border:1px solid var(--rule);border-radius:8px;margin-bottom:10px;padding:12px 16px 12px 18px;scroll-margin-top:12px;position:relative}.section-card:before{content:"";background:0 0;border-radius:0 3px 3px 0;width:4px;transition:background .2s;position:absolute;top:10px;bottom:10px;left:-1px}.section-card.active{border-color:var(--rule-2)}.section-card.active:before{background:var(--marker)}.section-card.sub{margin-left:18px}.section-card .head{cursor:pointer;align-items:baseline;gap:8px;display:flex}.section-card .head .chev{font-family:var(--mono);color:var(--muted);padding:0 4px;font-size:11px}.section-card .head h3{font-family:var(--serif);flex:1;margin:0;font-size:16px;font-weight:500}.section-card .head .page{font-family:var(--mono);color:var(--muted);font-size:11px}.section-card .gist{color:var(--muted);margin:2px 0 6px;font-size:12.5px}.section-card .body{margin-top:6px}.section-card.collapsed .body,.section-card.collapsed .gist{display:none}.section-card .foot{gap:6px;margin-top:8px;display:flex}.section-card .pending{color:var(--muted);font-size:12px;font-style:italic}.understood{color:var(--green)}.progress{background:var(--rule);border-radius:2px;flex:1;min-width:80px;height:4px;overflow:hidden}.progress>div{background:var(--marker);height:100%;transition:width .3s}.prose{font-family:var(--serif);color:var(--ink);font-size:14.5px;line-height:1.62}.prose>:first-child{margin-top:0}.prose>:last-child{margin-bottom:0}.prose p{margin:0 0 .75em}.prose h3,.prose h2,.prose h4{font-family:var(--sans);letter-spacing:.07em;text-transform:uppercase;color:var(--muted);margin:1.2em 0 .4em;font-size:11.5px;font-weight:600}.prose h3:before{content:"¶ ";color:var(--marker);-webkit-text-stroke:.5px var(--ink-2)}.prose ul,.prose ol{margin:0 0 .75em;padding-left:1.3em}.prose li{margin-bottom:.25em}.prose code{font-family:var(--mono);background:var(--blue-soft);border-radius:3px;padding:1px 4px;font-size:.88em}.prose pre{background:var(--ground);border:1px solid var(--rule);border-radius:6px;padding:10px;font-size:12.5px;overflow-x:auto}.prose pre code{background:0 0;padding:0}.prose table{border-collapse:collapse;font-family:var(--sans);width:100%;margin:.4em 0 .9em;font-size:13px}.prose th,.prose td{border:1px solid var(--rule);text-align:left;vertical-align:top;padding:5px 8px}.prose th{background:var(--ground);font-weight:600}.prose blockquote{border-left:3px solid var(--marker);color:var(--ink-2);margin:0 0 .75em;padding:2px 12px}.prose a.pref{font-family:var(--mono);background:var(--marker-soft);color:var(--ink);white-space:nowrap;border-radius:3px;padding:0 4px;font-size:.85em;text-decoration:none}.prose a.pref:hover{background:var(--marker)}.prose .katex-display{padding:4px 0;overflow:auto hidden}.prose strong{font-weight:600}.cursor:after{content:"▍";color:var(--marker);animation:1s steps(2,end) infinite blink}@keyframes blink{50%{opacity:0}}.lens-input{background:var(--paper);border:1px solid var(--rule);border-radius:8px;flex-direction:column;gap:10px;margin-bottom:12px;padding:12px;display:flex}.lens-input .selection{font-family:var(--serif);color:var(--ink-2);border-left:3px solid var(--marker);white-space:pre-wrap;max-height:120px;padding:2px 10px;font-size:13.5px;overflow:auto}.lens-input .selection.empty{border-left-color:var(--rule-2);color:var(--muted);font-style:italic}.lens-input img{border:1px solid var(--rule);border-radius:4px;align-self:flex-start;max-width:100%;max-height:220px}.modes{flex-wrap:wrap;gap:6px;display:flex}.lens-card{content-visibility:auto;contain-intrinsic-size:auto 240px;background:var(--paper);border:1px solid var(--rule);border-radius:8px;margin-bottom:10px;padding:12px 16px}.lens-card .meta{color:var(--muted);flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:8px;font-size:12px;display:flex}.lens-card .meta .grow{flex:1}.lens-card .quote{font-family:var(--serif);color:var(--ink-2);border-left:3px solid var(--marker);max-height:80px;margin-bottom:8px;padding:1px 10px;font-size:13px;overflow:hidden}.lens-card img{border:1px solid var(--rule);border-radius:4px;max-width:100%;max-height:180px;margin-bottom:8px}.chat{grid-template-rows:1fr auto;height:100%;min-height:0;display:grid}.chat-log{flex-direction:column;gap:12px;padding:14px 16px;display:flex;overflow:auto}.msg{max-width:92%}.msg.user{background:var(--ink);color:var(--ground);white-space:pre-wrap;border-radius:12px 12px 3px;align-self:flex-end;padding:8px 12px;font-size:14px}.msg.user .focus{opacity:.75;border-left:2px solid var(--marker);max-height:60px;margin-bottom:6px;padding-left:8px;font-size:11.5px;overflow:hidden}.msg.assistant{background:var(--paper);border:1px solid var(--rule);border-radius:12px 12px 12px 3px;align-self:flex-start;padding:10px 14px}.chat-input{border-top:1px solid var(--rule);background:var(--paper);flex-direction:column;gap:8px;padding:10px 12px;display:flex}.chat-input .row{align-items:flex-end;gap:8px;display:flex}.chat-input textarea{flex:1;min-height:42px;max-height:160px}.focus-chip{background:var(--marker-soft);border-radius:6px;align-items:center;gap:6px;max-width:100%;padding:4px 8px;font-size:12px;display:inline-flex}.focus-chip span{text-overflow:ellipsis;white-space:nowrap;font-family:var(--serif);overflow:hidden}.suggestions{flex-wrap:wrap;gap:6px;display:flex}.study-block{background:var(--paper);border:1px solid var(--rule);border-radius:8px;margin-bottom:12px;padding:14px 16px}.study-block>.head{align-items:center;gap:8px;margin-bottom:8px;display:flex}.study-block>.head h3{letter-spacing:.07em;text-transform:uppercase;color:var(--muted);flex:1;margin:0;font-size:12px;font-weight:600}.one-liner{font-family:var(--serif);margin:0 0 10px;font-size:18px;line-height:1.4}.prereq{grid-template-columns:auto 1fr;gap:4px 12px;font-size:13px;display:grid}.prereq b{font-weight:600}.glossary dl{grid-template-columns:max-content 1fr;gap:6px 14px;margin:0;font-size:13.5px;display:grid}.glossary dt{font-weight:600;font-family:var(--serif)}.glossary dd{color:var(--ink-2);margin:0}.glossary dd .pref{margin-left:6px}.flash{border:1px solid var(--rule-2);cursor:pointer;background:var(--ground);border-radius:8px;margin-bottom:8px;padding:12px}.flash .q{font-family:var(--serif);font-size:14.5px}.flash .a{border-top:1px dashed var(--rule-2);color:var(--ink-2);margin-top:8px;padding-top:8px;font-size:13.5px}.flash.known{border-color:var(--green)}.flash .rate{gap:6px;margin-top:8px;display:flex}.refs{margin:0;padding-left:2.2em;font-size:13px}.refs li{border-radius:4px;margin-bottom:8px;padding:2px 4px;scroll-margin-top:12px}.refs li::marker{font-family:var(--mono);color:var(--muted)}.refs li.flash-ref{background:var(--marker-soft)}.refs .ref-links{vertical-align:middle;gap:4px;margin-left:6px;display:inline-flex}.refs .ref-links a{text-decoration:none}.drawer-bg{z-index:40;background:#1b1f2a4d;position:fixed;inset:0}.drawer{background:var(--paper);border-left:1px solid var(--rule);z-index:41;flex-direction:column;gap:16px;width:360px;max-width:100vw;padding:20px;animation:.15s ease-out slide;display:flex;position:fixed;top:0;bottom:0;right:0;overflow:auto}@keyframes slide{0%{opacity:0;transform:translate(20px)}to{opacity:1;transform:none}}.drawer h2{font-family:var(--serif);margin:0;font-size:20px;font-weight:500}.field{flex-direction:column;gap:5px;display:flex}.field label{color:var(--muted);text-transform:uppercase;letter-spacing:.05em;font-size:12px;font-weight:600}.field .help{color:var(--muted);font-size:12px}.shortcuts{grid-template-columns:auto 1fr;gap:4px 12px;font-size:13px;display:grid}.shortcuts kbd{font-family:var(--mono);border:1px solid var(--rule-2);border-bottom-width:2px;border-radius:3px;padding:0 5px;font-size:11px}.spinner{border:2px solid var(--rule-2);border-top-color:var(--ink);border-radius:50%;width:12px;height:12px;animation:.7s linear infinite spin;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}html.app-shell,html.app-shell body{overscroll-behavior:none;height:100%;overflow:hidden}html.app-shell body{width:100%;position:fixed;inset:0}html.app-shell .pane,html.app-shell .chat-log,html.app-shell .pdf-scroll,html.app-shell .drawer{overscroll-behavior:contain}.pdf-scroll.capturing{touch-action:none;cursor:crosshair}.pdf-scroll.capturing .react-pdf__Page__textContent{pointer-events:none}.popover.sheet{top:auto;left:0;right:0;bottom:calc(var(--mobile-nav) + env(safe-area-inset-bottom));border-radius:12px 12px 0 0;justify-content:center;max-width:none;padding:10px 10px 12px;animation:.15s ease-out sheet;position:fixed;box-shadow:0 -6px 24px #1b1f2a2e}@keyframes sheet{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}.popover.sheet .btn{padding:8px 12px;font-size:14px}@media (max-width:700px){:root{--topbar:46px;--mobile-nav:56px}body{font-size:15px}.btn{padding:7px 12px;font-size:14px}.btn.small{padding:5px 10px;font-size:13px}.input,.textarea,.select{padding:9px 10px;font-size:16px}.reader.mobile{grid-template-rows:var(--topbar) minmax(0, 1fr) auto auto;width:100%;max-width:100vw;overflow:hidden}.reader.mobile>*,.mobile-body>.stage,.mobile-body>.side,.pane-host,.pdf-pane,.pane,.chat,.chat-log,.chat-input{min-width:0;max-width:100%}.mobile-nav{scrollbar-width:none;overflow:auto hidden}.mobile-nav::-webkit-scrollbar{display:none}.mobile-nav button{flex:1 0 auto;min-width:62px;padding:0 6px}.pane{overflow-wrap:anywhere;overflow:hidden auto}.chat-log{overflow-x:hidden}.msg,.section-card,.lens-card,.study-block,.flash,.pane-head>*{min-width:0;max-width:100%}.prose,.msg.user,.one-liner,.lens-input .selection{overflow-wrap:anywhere}.prose .katex{white-space:normal}.prose .katex-display,.pane-head .select{max-width:100%}.reader.mobile .topbar{gap:8px;padding:0 8px}.reader.mobile .topbar .brand .mark{width:16px;height:20px}.reader.mobile .topbar .title{font-size:14px}.mobile-body{grid-template-rows:1fr;grid-template-columns:1fr;min-height:0;display:grid}.mobile-body>.stage{grid-area:1/1;grid-template-rows:1fr;min-height:0;display:grid}.mobile-body>.stage.offstage{visibility:hidden;pointer-events:none}.mobile-body>.stage>.pdf-pane,.mobile-body>.side{min-height:0}.mobile-nav{min-height:calc(var(--mobile-nav) + env(safe-area-inset-bottom));border-top:1px solid var(--rule);background:var(--paper);padding-bottom:env(safe-area-inset-bottom);display:flex}.mobile-nav button{color:var(--muted);border-top:2px solid #0000;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:2px;font-size:11px;font-weight:500;display:flex;position:relative}.mobile-nav button .ico{font-size:18px;line-height:1}.mobile-nav button .sub{color:var(--muted);font-size:10px}.mobile-nav button.active{color:var(--ink);border-top-color:var(--marker);background:var(--marker-soft)}.mobile-nav button .spinner{position:absolute;top:6px;right:12px}.pdf-toolbar{scrollbar-width:none;gap:4px;padding:6px;overflow-x:auto}.pdf-toolbar::-webkit-scrollbar{display:none}.pdf-toolbar>*{flex-shrink:0}.pdf-toolbar .btn{min-height:32px}.pdf-toolbar .seg{border-width:1.5px;min-height:32px}.pdf-toolbar .seg button{padding:6px 12px;font-size:13px;font-weight:600}.pdf-toolbar .seg button.on{background:var(--marker);color:#1b1f2a}.pdf-toolbar .find-box .input{width:84px!important}.pdf-scroll{touch-action:pan-x pan-y;padding:8px 0 40vh}.pdf-scroll>.react-pdf__Document{will-change:transform}.pdf-page-wrap{margin-bottom:8px}.pdf-page-wrap .page-num{top:4px;right:4px}.pdf-hint{text-align:center;max-width:92vw;font-size:12px;bottom:12px}.find-results{width:auto;left:8px;right:8px}.pane{padding:10px 10px 40px}.pane-head{gap:6px 8px;margin-bottom:10px}.pane-head .level{flex:150px}.level input[type=range]{flex:1;width:auto;min-width:70px;height:22px}.level input[type=range]::-webkit-slider-thumb{width:20px;height:20px;margin-top:-7px}.level input[type=range]::-moz-range-thumb{width:18px;height:18px}.level .label{min-width:0}.section-card{margin-bottom:8px;padding:10px 10px 10px 14px}.section-card.sub{margin-left:6px}.section-card .head h3{font-size:15px}.prose{font-size:14.5px;line-height:1.55}.lens-card,.study-block,.chat-log{padding:10px}.msg{max-width:96%}.chat-input{padding:8px}.drawer{width:100vw;padding:16px}.library{padding:28px 16px 60px}.library h1{font-size:28px}.paper-row{grid-template-columns:1fr;gap:6px}.paper-row .btn{justify-self:start}.glossary dl{grid-template-columns:1fr;gap:2px 0}.glossary dd{margin-bottom:8px}.prereq{grid-template-columns:1fr}.prose table{display:block;overflow-x:auto}}.player{border-top:1px solid var(--rule);background:var(--paper);min-width:0;font-size:12.5px;overflow:hidden}.player .timeline{cursor:pointer;gap:2px;height:8px;padding:2px 10px 0;display:flex}.player .timeline .seg{background:var(--rule);border-radius:2px;flex:1 1 0;min-width:4px;position:relative;overflow:hidden}.player .timeline .seg.done{background:var(--marker);opacity:.55}.player .timeline .seg.cur{background:var(--rule-2)}.player .timeline .seg .fill{background:var(--marker);transition:width .25s linear;position:absolute;inset:0 auto 0 0}.player .timeline:hover .seg{filter:brightness(1.15)}::highlight(speaking){background-color:var(--marker-soft);color:var(--ink)}:root[data-theme=dark] ::highlight(speaking){background-color:#e6c93a59}.section-card .head .listen{min-width:28px;color:var(--muted);padding:0 8px;font-size:12px;line-height:20px}.section-card .head .listen.listening,.section-card .head .listen:hover{color:var(--ink)}.player .row{align-items:center;gap:6px;padding:6px 10px;display:flex}.player .play{background:var(--ink);width:34px;height:34px;color:var(--ground);border-color:#0000;border-radius:999px;justify-content:center;align-items:center;font-size:14px;display:inline-flex}.player .play:hover:not(:disabled){background:var(--ink-2)}.player .what{flex:1;min-width:0}.player .what .title{white-space:nowrap;text-overflow:ellipsis;font-weight:500;overflow:hidden}.player .what .now{white-space:nowrap;text-overflow:ellipsis;font-family:var(--serif);font-size:12px;overflow:hidden}.player .what .err{color:var(--red)}.player .what .notice-line{color:var(--muted);font-size:11.5px}.player .rate{padding:2px 20px 2px 6px;font-size:12px}.player .engine:empty{display:none}.player.loading .play .spinner{border-top-color:var(--ground)}.btn.listening{background:var(--marker-soft);border-color:#0000}.section-card.speaking{border-color:var(--marker);box-shadow:0 0 0 2px var(--marker-soft)}.msg-tools{justify-content:flex-end;margin-top:4px;display:flex}.btn.voice{color:var(--muted)}.btn.voice:hover:not(:disabled){color:var(--ink)}.btn.voice.danger{color:var(--red)}.section-card .head .voice{white-space:nowrap;padding:0 6px;font-size:11px;line-height:20px}.section-card .head .listen:disabled{opacity:.35}:root[data-tts-active] [data-speech-id] .prose{cursor:pointer}:root[data-tts-active] [data-speech-id] .prose ::highlight(speaking){cursor:default}.hand{font-family:Patrick Hand,Segoe Print,Comic Sans MS,cursive}.watch-intro{text-align:center;padding:36px 20px}.watch-intro .row{flex-wrap:wrap;justify-content:center;align-items:center;gap:12px;margin-top:18px;display:flex}.watch-intro .small,.watch .small{font-size:12px}.watch-intro .small{margin-top:16px}.watch-intro .plan{text-align:left;max-width:520px;margin:18px auto 0;font-size:13px}.watch-intro .plan li{margin-bottom:4px}.watch{padding-top:10px}.watch .pane-head{margin-bottom:8px}.screen{aspect-ratio:16/9;background:var(--paper);box-shadow:var(--shadow);border:1px solid var(--rule);border-radius:10px;position:relative;overflow:hidden}.screen .board-canvas{cursor:pointer;width:100%;height:100%;display:block}.screen .subtitle{text-align:center;pointer-events:none;position:absolute;bottom:5%;left:6%;right:6%}.screen .subtitle span{color:#fff;font-family:var(--serif);-webkit-box-decoration-break:clone;box-decoration-break:clone;background:#14161cc7;border-radius:4px;padding:3px 10px;font-size:clamp(13px,1.9vw,22px);line-height:1.5;display:inline}.screen .overlay{pointer-events:none;justify-content:center;align-items:center;display:flex;position:absolute;inset:0}.screen .overlay .big-play{pointer-events:auto;background:var(--ink);width:84px;height:84px;color:var(--ground);border-radius:999px;justify-content:center;align-items:center;padding-left:6px;font-size:34px;display:inline-flex;box-shadow:0 8px 30px #0000004d}.screen .overlay .big-play:hover{background:var(--ink-2)}.screen .overlay .big-play .spinner{border-width:3px;border-top-color:var(--ground);width:28px;height:28px;padding:0}.screen .fullbtn{color:#fff;opacity:0;background:#14161c8c;border-radius:6px;justify-content:center;align-items:center;width:34px;height:34px;font-size:16px;transition:opacity .15s;display:inline-flex;position:absolute;bottom:10px;right:12px}:is(.screen:hover .fullbtn,.screen.full .fullbtn,.screen:fullscreen .fullbtn){opacity:1}.screen.full:not(:fullscreen){z-index:60;aspect-ratio:auto;background:#000;border:0;border-radius:0;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.screen.full:not(:fullscreen) .board-canvas{aspect-ratio:16/9;width:auto;max-width:100vw;height:auto;max-height:100vh;margin:auto}.screen:fullscreen{background:#000;justify-content:center;align-items:center;display:flex}.screen:fullscreen .board-canvas{aspect-ratio:16/9;width:auto;max-width:100vw;height:auto;max-height:100vh}:is(.screen.full .corner,.screen:fullscreen .corner),.caption-line{display:none}.screen .corner{color:var(--muted);background:var(--paper);border:1px solid var(--rule);opacity:.9;border-radius:999px;padding:1px 8px;font-size:12px;position:absolute;top:10px;right:12px}.transport{flex-wrap:wrap;align-items:center;gap:8px;padding:10px 2px 4px;display:flex}.transport .play{background:var(--ink);width:36px;height:36px;color:var(--ground);border-color:#0000;border-radius:999px;justify-content:center;align-items:center;font-size:15px;display:inline-flex}.transport .play:hover:not(:disabled){background:var(--ink-2)}.transport .play .spinner{border-top-color:var(--ground)}.transport .time{font-family:var(--mono);color:var(--muted);white-space:nowrap;font-size:12px}.transport .grow{flex:1}.transport .rate{padding:2px 20px 2px 6px;font-size:12px}.chapters{cursor:pointer;gap:2px;height:10px;margin:2px 0 10px;display:flex}.chapters .seg{background:var(--rule);border-radius:2px;flex:1 1 0;min-width:3px;position:relative;overflow:hidden}.chapters .seg.done{background:var(--marker);opacity:.6}.chapters .seg.cur{background:var(--rule-2)}.chapters .seg .fill{background:var(--marker);transition:width .25s linear;position:absolute;inset:0 auto 0 0}.chapters .seg.head{background:var(--ink-2);opacity:.5;flex-grow:0;flex-basis:6px}.chapters:hover .seg{filter:brightness(1.1)}.script{background:var(--paper);border:1px solid var(--rule);border-radius:8px;margin-top:4px;padding:10px 14px}.script .head{align-items:baseline;gap:10px;margin-bottom:6px;display:flex}.script .head h3{flex:1;min-width:0;margin:0;font-family:Patrick Hand,Segoe Print,cursive;font-size:20px;font-weight:400}.script .head .muted{font-size:12px}.script p{font-family:var(--serif);margin:0;font-size:14.5px;line-height:1.65}.script p span{cursor:pointer;border-radius:3px;padding:0 2px}.script p span:hover{background:var(--blue-soft)}.script p span.now{background:var(--marker-soft)}.script p span.done{color:var(--ink-2)}.scene-list{margin:12px 0 0;padding:0;list-style:none}.scene-list li.segment{color:var(--muted);margin:10px 0 2px 8px;font-family:Patrick Hand,Segoe Print,cursive;font-size:16px}.scene-list li.segment:first-child{margin-top:0}.scene-list li button{text-align:left;border-radius:6px;grid-template-columns:44px 1fr auto;align-items:baseline;gap:10px;width:100%;padding:5px 8px;font-size:13.5px;display:grid}.scene-list li button:hover{background:var(--blue-soft)}.scene-list li.active button{background:var(--marker-soft)}.scene-list li .n{color:var(--muted);font-family:var(--mono);font-size:11.5px}.scene-list li .t{text-overflow:ellipsis;white-space:nowrap;min-width:0;overflow:hidden}.scene-list li.pending{padding:6px 8px}.export-row{flex-wrap:wrap;align-items:center;gap:10px;margin-top:12px;font-size:12px;display:flex}.export-row progress{width:160px;height:8px}@media (max-width:700px){.screen{border-radius:6px}.screen .overlay .big-play{width:64px;height:64px;font-size:26px}.screen .fullbtn{opacity:1;width:30px;height:30px;font-size:14px;bottom:6px;right:6px}:is(.screen:not(.full):not(:fullscreen) .subtitle,.screen:not(.full):not(:fullscreen) .corner){display:none}.caption-line{font-family:var(--serif);min-height:44px;margin:8px 2px 0;font-size:15px;line-height:1.5;display:block}.screen.full .caption-line,.transport .rate,.transport .engine{display:none}.scene-list li button{grid-template-columns:36px 1fr auto}}
