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#adc9ec61, transparent 55%), linear-gradient(135deg, #edf2f8, #e4edf8 55%, #f5f8fc);--header-fill:#f1f7fea3}*,:before,:after{box-sizing:border-box}body{background:var(--bg);min-width:320px;min-height:100vh;color:var(--text);font-family:var(--font-serif);margin:0;font-size:16px;line-height:1.65;transition:background-color .18s,color .18s}button,input,select,textarea{color:inherit;font:inherit}button,a,summary,[data-study-focus]{-webkit-tap-highlight-color:var(--clear)}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,[data-study-focus]:focus-visible{outline:2px solid var(--amber);outline-offset:3px;box-shadow:var(--focus-glow)}::selection{color:var(--on-accent);background:var(--amber)}html[data-motion=off] *,html[data-motion=off] :before,html[data-motion=off] :after{scroll-behavior:auto!important;transition:none!important;animation:none!important}._appShell_13zr8_135{background:var(--bg);min-height:100vh;color:var(--text);transition:background-color .18s,color .18s}._header_13zr8_142{z-index:15;border-bottom:1px solid var(--line);background:var(--bg);grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:22px;width:min(1152px,100% - 48px);min-height:78px;margin:0 auto;display:grid;position:sticky;top:0}._brand_13zr8_157{background:var(--clear);min-width:0;min-height:48px;color:var(--text);text-align:left;cursor:pointer;border:0;align-items:center;gap:11px;padding:4px 0;display:inline-flex}._brandMark_13zr8_171{border:1px solid var(--line-strong);width:36px;height:36px;color:var(--amber);border-radius:50%;flex:none;justify-content:center;align-items:flex-end;gap:3px;padding:9px 10px;display:flex}._brandMark_13zr8_171 i{background:var(--amber);border-radius:99px;width:2px;display:block}._brandMark_13zr8_171 i:first-child{opacity:.65;height:8px}._brandMark_13zr8_171 i:nth-child(2){height:13px}._brandMark_13zr8_171 i:nth-child(3){opacity:.8;height:10px}._brand_13zr8_157 strong{letter-spacing:.06em;font-size:16px;font-weight:500;display:block}._brand_13zr8_157 small{color:var(--muted);margin-top:2px;font-size:12px;line-height:1.35;display:block}._navList_13zr8_221{justify-content:center;align-items:center;gap:4px;min-width:0;display:flex}._navButton_13zr8_229,._navButtonCompact_13zr8_230{border:1px solid var(--clear);border-radius:var(--radius-xs);background:var(--clear);min-width:68px;min-height:44px;color:var(--muted);cursor:pointer;white-space:nowrap;justify-content:center;align-items:center;gap:7px;padding:0 11px;font-size:13px;transition:color .16s,background-color .16s,border-color .16s;display:inline-flex;position:relative}._navButton_13zr8_229:hover,._navButtonCompact_13zr8_230:hover,._navButtonCurrent_13zr8_256{border-color:var(--line);background:var(--surface);color:var(--text)}._navButtonCurrent_13zr8_256:after{background:var(--amber);content:"";width:15px;height:1px;position:absolute;bottom:4px;right:50%;transform:translate(50%)}._navIcon_13zr8_273{color:var(--amber);font-family:var(--font-ui);place-items:center;font-size:15px;line-height:1;display:inline-grid}._navButton_13zr8_229>small{border:1px solid var(--line);min-width:21px;min-height:21px;color:var(--muted);border-radius:50%;place-items:center;padding:0 4px;font-size:12px;display:inline-grid}._navButtonCurrent_13zr8_256>small{border-color:var(--line-strong);background:var(--amber-soft);color:var(--amber)}._headerRight_13zr8_300,._appearanceControls_13zr8_301{justify-content:flex-end;align-items:center;display:flex}._headerRight_13zr8_300{gap:6px}._quietToggle_13zr8_312{border:1px solid var(--clear);border-radius:var(--radius-xs);background:var(--clear);min-width:44px;min-height:44px;color:var(--muted);cursor:pointer;white-space:nowrap;justify-content:center;align-items:center;gap:6px;padding:0 9px;font-size:12px;transition:color .16s,border-color .16s,background-color .16s;display:inline-flex}._quietToggle_13zr8_312:hover,._quietToggle_13zr8_312[aria-pressed=true]{border-color:var(--line);background:var(--surface);color:var(--text)}._quietToggle_13zr8_312 svg,._quietToggle_13zr8_312>span:first-child{color:var(--amber);font-size:15px}._appearanceControls_13zr8_301 ._quietToggle_13zr8_312:first-child>span:first-child{font-size:20px;line-height:1}._localBadge_13zr8_348,._subjectBadge_13zr8_349{min-height:32px;color:var(--muted);white-space:nowrap;justify-content:center;align-items:center;gap:7px;font-size:12px;display:inline-flex}._localBadge_13zr8_348>span{background:var(--amber);border-radius:50%;width:6px;height:6px}._subjectBadge_13zr8_349{border:1px solid var(--line-strong);color:var(--text-soft);border-radius:99px;padding:0 10px}._layout_13zr8_374{width:min(1152px,100% - 48px);min-height:calc(100vh - 145px);margin:0 auto}._sidebar_13zr8_380{display:none}._main_13zr8_384{width:min(1040px,100%);min-width:0;margin:0 auto;padding:30px 0 52px}._welcome_13zr8_391{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:28px;min-height:190px;padding:12px 8px 24px;display:flex}._welcome_13zr8_391>div:first-child{min-width:0}._eyebrow_13zr8_405,._sectionKicker_13zr8_406,._navEyebrow_13zr8_407{color:var(--muted);letter-spacing:.12em;font-size:12px;font-weight:400;line-height:1.5}._eyebrow_13zr8_405 span{background:var(--line-strong);width:22px;height:1px;margin:0 8px 4px;display:inline-block}._welcome_13zr8_391 h1{color:var(--text);font-family:var(--font-serif);letter-spacing:.025em;margin:10px 0 7px;font-size:clamp(30px,4vw,42px);font-weight:400;line-height:1.34}._welcome_13zr8_391 h1 em{color:var(--amber);font-style:normal}._welcome_13zr8_391 p{max-width:500px;color:var(--text-soft);margin:0;font-size:15px;line-height:1.8}._welcomeSeal_13zr8_446{border:1px solid var(--line-strong);width:106px;height:106px;color:var(--amber);box-shadow:inset 0 0 0 5px var(--bg), inset 0 0 0 6px var(--line);border-radius:50%;flex:none;place-items:center;margin-right:clamp(10px,5vw,48px);display:grid;position:relative}._welcomeSeal_13zr8_446:before{border:1px solid var(--line);content:"";border-radius:50%;position:absolute;inset:13px}._welcomeSeal_13zr8_446 span{color:var(--muted);letter-spacing:.08em;font-size:12px;position:absolute;top:17px}._welcomeSeal_13zr8_446>._heroSymbol_13zr8_476{z-index:1;color:var(--text);font-family:var(--font-serif);letter-spacing:0;font-size:28px;font-style:italic;font-weight:400;line-height:1;display:block;position:relative;top:auto}._heroSymbol_13zr8_476 sup{color:var(--amber);font-size:.5em}._welcomeSeal_13zr8_446>small{color:var(--muted);white-space:nowrap;font-size:12px;position:absolute;bottom:8px;left:50%;transform:translate(-50%)}._heroActions_13zr8_505{flex-wrap:wrap;align-items:center;gap:9px;margin-top:18px;display:flex}._resumeCard_13zr8_513{border:1px solid var(--line);background:var(--surface);align-items:center;gap:14px;margin:17px 0 20px;padding:13px 15px;display:flex}._resumeIcon_13zr8_523{border:1px solid var(--line-strong);width:36px;height:36px;color:var(--amber);border-radius:50%;flex:none;place-items:center;font-size:17px;display:grid}._resumeText_13zr8_535{gap:3px;min-width:0;display:grid}._resumeText_13zr8_535 strong{color:var(--text);font-size:14px;font-weight:500}._resumeText_13zr8_535 span{color:var(--muted);font-size:12px;line-height:1.5}._buttonSmallPrimary_13zr8_553{border:1px solid var(--text);border-radius:var(--radius-xs);background:var(--text);min-height:44px;color:var(--bg);cursor:pointer;white-space:nowrap;justify-content:center;align-items:center;gap:9px;margin-left:auto;padding:0 14px;font-size:13px;transition:background-color .16s,border-color .16s,color .16s;display:inline-flex}._buttonSmallPrimary_13zr8_553:hover:not(:disabled){border-color:var(--amber);background:var(--amber);color:var(--on-accent)}._overviewGrid_13zr8_577{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:19px 0 26px;display:grid}._overviewCard_13zr8_584{border:1px solid var(--line);background:var(--surface);grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:10px;min-width:0;min-height:83px;padding:12px 15px;display:grid;position:relative}._overviewIcon_13zr8_597{border:1px solid var(--line);width:30px;height:30px;color:var(--amber);border-radius:50%;place-items:center;font-size:15px;display:grid}._overviewIconSage_13zr8_608,._overviewIconGold_13zr8_609{background:var(--surface-soft);color:var(--amber)}._overviewLabel_13zr8_614{color:var(--text-soft);font-size:13px;line-height:1.45}._overviewCard_13zr8_584>strong{color:var(--text);font-family:var(--font-serif);white-space:nowrap;font-size:23px;font-weight:400}._overviewCard_13zr8_584>strong small{color:var(--muted);font-size:12px}._overviewHint_13zr8_633{color:var(--muted);grid-column:2/-1;margin-top:-9px;font-size:12px;line-height:1.5}._studyPanel_13zr8_641,._scopePanel_13zr8_642,._settingsCard_13zr8_643{border:1px solid var(--line);background:var(--surface);margin:0 0 18px;padding:22px 22px 23px}._sectionHeading_13zr8_650{justify-content:space-between;align-items:center;gap:14px;margin-bottom:16px;display:flex}._sectionHeading_13zr8_650 h2{color:var(--text);font-family:var(--font-serif);margin:4px 0 0;font-size:21px;font-weight:400;line-height:1.4}._headingNote_13zr8_667{color:var(--muted);text-align:right;font-size:12px}._sessionGrid_13zr8_673{grid-template-columns:repeat(4,minmax(0,1fr));gap:9px;display:grid}._sessionCard_13zr8_679{border:1px solid var(--line);background:var(--surface-soft);flex-direction:column;min-width:0;min-height:176px;padding:13px 13px 12px;display:flex}._sessionDue_13zr8_689{--mode-accent:var(--amber)}._sessionNew_13zr8_690{--mode-accent:var(--text-soft)}._sessionRecall_13zr8_691{--mode-accent:var(--muted)}._sessionRecognition_13zr8_692{--mode-accent:var(--text)}._sessionDue_13zr8_689,._sessionNew_13zr8_690,._sessionRecall_13zr8_691,._sessionRecognition_13zr8_692{border-left:2px solid var(--mode-accent);background:color-mix(in srgb, var(--mode-accent) 3%, var(--surface-soft))}._sessionCardTop_13zr8_702{justify-content:space-between;align-items:center;gap:8px;display:flex}._sessionIcon_13zr8_709{border:1px solid color-mix(in srgb, var(--mode-accent) 48%, var(--line));border-radius:var(--radius-xs);background:color-mix(in srgb, var(--mode-accent) 8%, var(--surface));width:30px;height:30px;color:var(--mode-accent);place-items:center;font-size:15px;display:grid}._sessionIcon_13zr8_709 svg{width:18px;height:18px}._sessionCount_13zr8_726{color:var(--mode-accent);font-family:var(--font-serif);text-align:right;font-size:19px;line-height:1.1}._sessionCount_13zr8_726 small{color:var(--muted);font-family:var(--font-serif);margin-top:4px;font-size:12px;line-height:1.3;display:block}._sessionCard_13zr8_679 h3{color:var(--text);margin:12px 0 4px;font-size:15px;font-weight:500;line-height:1.45}._sessionCard_13zr8_679 p{color:var(--muted);margin:0 0 10px;font-size:13px;line-height:1.6}._sessionCard_13zr8_679>button{border:1px solid var(--line-strong);border-radius:var(--radius-xs);background:var(--surface);min-height:44px;color:var(--text);cursor:pointer;justify-content:space-between;align-items:center;gap:8px;margin-top:auto;padding:0 10px;font-size:13px;transition:border-color .16s,background-color .16s;display:flex}._sessionCard_13zr8_679>button:hover:not(:disabled){border-color:var(--mode-accent);background:color-mix(in srgb, var(--mode-accent) 9%, var(--surface))}._sessionCard_13zr8_679>button:disabled,._buttonPrimary_13zr8_781:disabled,._buttonSecondary_13zr8_782:disabled,._buttonDanger_13zr8_783:disabled,._buttonSmallPrimary_13zr8_553:disabled,._ratingButton_13zr8_785:disabled,._iconAction_13zr8_786:disabled{cursor:not-allowed;opacity:.55}._savedScopeSummary_13zr8_791{border:1px solid var(--line);background:var(--surface-soft);gap:5px;margin:0 0 14px;padding:13px 14px;display:grid}._savedScopeHead_13zr8_800{justify-content:space-between;align-items:center;gap:12px;display:flex}._savedScopeHead_13zr8_800>span{color:var(--text-soft);font-size:13px;line-height:1.5}._savedScopeHead_13zr8_800>strong{color:var(--amber);font-size:14px;font-weight:500}._savedScopeSummary_13zr8_791 p{color:var(--text);margin:0;font-size:14px;line-height:1.65}._savedScopeSummary_13zr8_791 p i{color:var(--amber);padding:0 4px;font-style:normal}._savedScopeSummary_13zr8_791>small{color:var(--muted);font-size:12px;line-height:1.65}._rangeNotice_13zr8_838{border:1px solid var(--line);background:var(--surface-soft);color:var(--text-soft);align-items:flex-start;gap:9px;margin:0 0 12px;padding:10px 12px;display:flex}._rangeNotice_13zr8_838>span{border:1px solid var(--line-strong);width:22px;height:22px;color:var(--amber);border-radius:50%;flex:none;place-items:center;font-size:12px;display:grid}._rangeNotice_13zr8_838 p{margin:0;font-size:13px;line-height:1.65}._scopePanel_13zr8_642{padding:0 22px 18px}._scopePanel_13zr8_642>._sectionHeading_13zr8_650{margin-bottom:15px;padding-top:22px}._scopeSummary_13zr8_876{border:0;border-bottom:1px solid var(--line);background:var(--surface);cursor:pointer;justify-content:space-between;align-items:center;gap:18px;min-height:60px;margin:0 -22px;padding:13px 22px;list-style:none;display:flex;position:relative}._scopeSummary_13zr8_876::-webkit-details-marker{display:none}._summaryText_13zr8_896{min-width:0;color:var(--text-soft);flex:1;font-size:13px;line-height:1.5;display:block}._summaryText_13zr8_896>strong{color:var(--text);margin-top:2px;font-size:14px;font-weight:500;line-height:1.5;display:block}._rangeLabel_13zr8_914{color:var(--muted);font-size:12px}._scopeSummary_13zr8_876>span:last-child{color:var(--amber);white-space:nowrap;flex:none;align-items:center;gap:6px;font-size:12px;display:inline-flex}._scopeSummary_13zr8_876>span:last-child>span[aria-hidden=true]{font-size:15px;transition:transform .16s;display:inline-block;transform:rotate(0)}._scopePanel_13zr8_642[open]>._scopeSummary_13zr8_876>span:last-child>span[aria-hidden=true]{transform:rotate(180deg)}._scopeGroup_13zr8_940{border-top:1px solid var(--line);grid-template-columns:132px minmax(0,1fr);gap:12px;padding:15px 0;display:grid}._scopeLabel_13zr8_948{flex-wrap:wrap;align-items:baseline;gap:6px;display:flex}._scopeLabel_13zr8_948>span{color:var(--amber);font-family:var(--font-ui);font-size:12px}._scopeLabel_13zr8_948 strong{color:var(--text);font-size:14px;font-weight:500}._scopeLabel_13zr8_948 small{color:var(--muted);font-size:12px}._choiceRow_13zr8_972,._lessonChips_13zr8_973,._tagChips_13zr8_974{flex-wrap:wrap;align-items:center;gap:7px;display:flex}._choice_13zr8_972,._lessonChip_13zr8_973,._tagChip_13zr8_974{border:1px solid var(--line);border-radius:var(--radius-xs);background:var(--surface);min-height:44px;color:var(--text-soft);cursor:pointer;justify-content:center;align-items:center;gap:6px;padding:0 13px;font-size:13px;transition:color .15s,border-color .15s,background-color .15s;display:inline-flex}._choice_13zr8_972:hover,._lessonChip_13zr8_973:hover,._tagChip_13zr8_974:hover,._clearChip_13zr8_1002:hover{border-color:var(--amber);color:var(--text)}._choiceSelected_13zr8_1007,._lessonChipSelected_13zr8_1008,._tagChipSelected_13zr8_1009{border-color:var(--amber);background:var(--amber-soft);color:var(--text)}._choiceSelected_13zr8_1007>span,._tagChipSelected_13zr8_1009>span,._lessonChipSelected_13zr8_1008>span{color:var(--amber);font-size:12px}._lessonChip_13zr8_973{min-width:48px;font-family:var(--font-serif);gap:3px;font-size:15px}._lessonChip_13zr8_973 span{color:var(--muted);font-size:12px}._tagChip_13zr8_974{border-radius:99px}._clearChip_13zr8_1002{border:1px solid var(--clear);border-radius:var(--radius-xs);background:var(--clear);min-height:44px;color:var(--muted);cursor:pointer;padding:0 10px;font-size:12px}._scopeHint_13zr8_1049{color:var(--muted);grid-column:2;margin:-3px 0 0;font-size:12px;line-height:1.6}._mutedText_13zr8_1057{color:var(--muted);font-size:13px}._scopeFooter_13zr8_1062{border-top:1px solid var(--line);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;padding:15px 0 0;display:flex}._orderPicker_13zr8_1072{border:1px solid var(--line);border-radius:var(--radius-xs);background:var(--surface-soft);flex-wrap:wrap;align-items:center;gap:2px;min-height:44px;padding:3px;display:inline-flex}._orderPicker_13zr8_1072>span{color:var(--muted);margin:0 7px;font-size:12px}._orderPicker_13zr8_1072 button{border:1px solid var(--clear);border-radius:var(--radius-xs);background:var(--clear);min-height:44px;color:var(--muted);cursor:pointer;padding:0 10px;font-size:12px}._orderPicker_13zr8_1072 ._orderSelected_13zr8_1101{border-color:var(--line-strong);background:var(--surface);color:var(--text)}._buttonPrimary_13zr8_781,._buttonSecondary_13zr8_782,._buttonDanger_13zr8_783{border:1px solid var(--text);border-radius:var(--radius-xs);background:var(--text);min-height:44px;color:var(--bg);cursor:pointer;justify-content:center;align-items:center;gap:9px;padding:0 15px;font-size:13px;line-height:1.3;transition:background-color .16s,border-color .16s,color .16s;display:inline-flex}._buttonPrimary_13zr8_781:hover:not(:disabled){border-color:var(--amber);background:var(--amber);color:var(--on-accent)}._buttonSecondary_13zr8_782{border-color:var(--line-strong);background:var(--surface);color:var(--text)}._buttonSecondary_13zr8_782:hover:not(:disabled){border-color:var(--amber);background:var(--amber-soft)}._buttonDanger_13zr8_783{border-color:var(--danger);background:var(--danger);color:var(--on-accent)}._buttonDanger_13zr8_783:hover:not(:disabled){border-color:var(--text);background:var(--text);color:var(--bg)}._scopeFooter_13zr8_1062>._buttonPrimary_13zr8_781{min-width:168px}._textButton_13zr8_1159{border:1px solid var(--clear);border-radius:var(--radius-xs);background:var(--clear);min-height:44px;color:var(--text-soft);cursor:pointer;justify-content:center;align-items:center;gap:7px;padding:0 8px;font-size:13px;transition:color .15s,background-color .15s;display:inline-flex}._textButton_13zr8_1159:hover:not(:disabled){background:var(--surface-soft);color:var(--amber)}._unappliedNote_13zr8_1180{color:var(--amber);margin:9px 0 0;font-size:12px;line-height:1.6}._scopeCoverage_13zr8_1187{border:1px solid var(--line);background:var(--surface-soft);grid-template-columns:minmax(170px,.85fr) minmax(0,1.5fr);gap:12px 18px;margin-top:18px;padding:14px;display:grid}._scopeCoverage_13zr8_1187>div:first-child{align-content:center;gap:5px;display:grid}._scopeCoverage_13zr8_1187 strong{color:var(--text);font-size:14px;font-weight:500}._scopeCoverage_13zr8_1187>div:first-child span{color:var(--muted);font-size:12px;line-height:1.6}._coverageCounts_13zr8_1215{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:6px;display:flex}._coverageCounts_13zr8_1215>span{border:1px solid var(--line);background:var(--surface);min-width:66px;color:var(--muted);text-align:center;gap:3px;padding:8px 9px;font-size:12px;line-height:1.4;display:grid}._coverageCounts_13zr8_1215 b{color:var(--text);font-size:12px;font-weight:500}._scopeCoverage_13zr8_1187>small{color:var(--muted);grid-column:1/-1;font-size:12px;line-height:1.6}._lastNote_13zr8_1249{color:var(--text-soft);align-items:center;gap:12px;margin:24px 8px 0;display:flex}._noteMark_13zr8_1257{color:var(--amber);font-family:var(--font-serif);font-size:40px;line-height:1}._lastNote_13zr8_1249 p{font-family:var(--font-serif);margin:0;font-size:15px;line-height:1.65}._lastNote_13zr8_1249 small{color:var(--muted);font-size:12px}._noteRule_13zr8_1276{background:var(--line-strong);width:50px;height:1px;margin-left:auto}._studyView_13zr8_1283{width:min(790px,100%);margin:0 auto;padding:0 0 20px}._studyView_13zr8_1283 [data-study-transition][data-phase=revealed] [data-study-front]{display:none}._practiceModeSwitch_13zr8_1293{border:1px solid var(--line);background:var(--surface-soft);border-radius:999px;gap:3px;width:fit-content;margin:0 0 7px auto;padding:3px;display:flex}._practiceModeSwitch_13zr8_1293>button{min-height:34px;color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:999px;padding:0 12px;font-size:12px}._practiceModeSwitch_13zr8_1293>button:disabled{cursor:not-allowed;opacity:.6}._recognitionSummary_13zr8_1326,._recognitionSummaryCompact_13zr8_1327{border:1px solid var(--line);background:var(--surface-soft);color:var(--text-soft);flex-wrap:wrap;align-items:baseline;gap:5px 12px;display:flex}._recognitionSummary_13zr8_1326{width:min(520px,100% - 32px);margin:14px auto 0;padding:10px 13px;font-size:13px}._recognitionSummary_13zr8_1326>div{align-items:baseline;gap:8px;margin-right:auto;display:flex}._recognitionSummary_13zr8_1326>div strong{color:var(--text);font-weight:500}._recognitionSummary_13zr8_1326>div span,._recognitionSummary_13zr8_1326 small,._recognitionSummaryCompact_13zr8_1327 small{color:var(--muted);font-size:11px}._recognitionSummaryCompact_13zr8_1327{justify-content:flex-start;gap:4px 10px;margin:0 0 8px;padding:7px 10px;font-size:12px}._recognitionSummaryCompact_13zr8_1327>strong{color:var(--text);font-weight:500}._backLink_13zr8_1376{background:var(--clear);min-height:44px;color:var(--muted);cursor:pointer;border:0;align-items:center;padding:0 5px;font-size:13px;display:inline-flex}._backLink_13zr8_1376:hover{color:var(--amber)}._studyTopline_13zr8_1392{color:var(--muted);flex-wrap:wrap;align-items:center;gap:8px;margin:9px 0 13px;font-size:12px;line-height:1.5;display:flex}._studyModeTag_13zr8_1403{border:1px solid var(--line-strong);color:var(--amber);border-radius:99px;padding:3px 9px;font-size:12px}._toplineDot_13zr8_1411{color:var(--line-strong)}._flashcard_13zr8_1415{background:var(--clear);width:100%;min-width:0;min-height:100%;box-shadow:none;border:0;border-radius:0;padding:0}._primaryAnswer_13zr8_1426{border:1px solid var(--line);background:var(--surface-soft);gap:9px;margin:8px 0 0;padding:10px 12px;display:grid}._primaryAnswer_13zr8_1426>[data-study-correct-answer]{overscroll-behavior:contain;border-left:2px solid var(--amber);max-height:min(24vh,190px);color:var(--text);scrollbar-width:thin;padding:8px 10px;overflow:auto}._primaryAnswer_13zr8_1426>[data-study-correct-answer] ._promptContent_13zr8_1445{min-height:28px}._correctOptionFormula_13zr8_1449{background:0 0;border:0;margin:0;padding:3px 0;font-size:clamp(18px,2vw,22px)}._recognitionResultHeading_13zr8_1457{flex-wrap:wrap;align-items:baseline;gap:5px 10px;display:flex}._recognitionResultHeading_13zr8_1457 strong{color:var(--text);font-size:16px;font-weight:600}._recognitionResultHeading_13zr8_1457 span{color:var(--muted);font-size:12px}._correctAnswerCompact_13zr8_1475{gap:5px;min-width:0;display:grid}._correctAnswerCompact_13zr8_1475>._detailLabel_13zr8_1481{margin-bottom:0}._studySource_13zr8_1485{color:var(--muted);margin:2px 0 10px;font-size:12px;line-height:1.5}._primaryAnswer_13zr8_1426>._ratingArea_13zr8_1492{border:0;margin:1px 0 0;padding:0}._primaryAnswer_13zr8_1426>._ratingArea_13zr8_1492 ._feedbackButton_13zr8_1498{min-height:46px}._recallSavedStatus_13zr8_1502{border-top:1px solid var(--line);color:var(--text-soft);padding:9px 0 0;font-size:13px;line-height:1.5}._cardTop_13zr8_1510{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:12px;padding-bottom:12px;display:flex}._cardTopLabel_13zr8_1519,._cardSource_13zr8_1520{color:var(--muted);font-size:12px;line-height:1.5}._cardTopLabel_13zr8_1519{color:var(--amber);letter-spacing:.1em}._cardSource_13zr8_1520{overflow-wrap:anywhere;text-align:right}._questionTitle_13zr8_1536{color:var(--text);font-family:var(--font-serif);margin:21px 0 7px;font-size:clamp(22px,3vw,29px);font-weight:400;line-height:1.45}._questionPrompt_13zr8_1545{color:var(--text-soft);white-space:pre-line;margin:0 0 18px;font-size:15px;line-height:1.85}._promptContent_13zr8_1445{overflow-wrap:anywhere;min-width:0;display:block}._inlineMath_13zr8_1559{color:inherit;padding:0 2px;display:inline}._inlineMath_13zr8_1559 .katex{white-space:nowrap;font-size:1.08em}._wideInlineMath_13zr8_1570{scrollbar-width:thin;max-width:100%;padding:5px 0;display:block;overflow:auto hidden}.katex .cjk_fallback{font-family:var(--font-serif)}._promptEquation_13zr8_1583{max-width:100%;margin:6px 0;font-size:17px}._recallCue_13zr8_1589{border-left:1px solid var(--amber);background:var(--surface-soft);max-width:580px;color:var(--text-soft);align-items:flex-start;gap:10px;margin:20px 0 8px;padding:12px 13px;display:flex}._recallCue_13zr8_1589>span{color:var(--amber);font-size:14px}._recallCue_13zr8_1589 p{margin:0;font-size:14px;line-height:1.75}._recallActions_13zr8_1612{flex-wrap:wrap;align-items:center;gap:9px;margin-top:18px;display:flex}._optionsBlock_13zr8_1620{margin:19px 0 2px}._optionsHeading_13zr8_1624{color:var(--text-soft);flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:6px 12px;margin-bottom:9px;font-size:14px;display:flex}._optionsHeading_13zr8_1624 small{color:var(--muted);font-size:12px}._optionList_13zr8_1640{gap:7px;margin:0 0 13px;display:grid}._optionButton_13zr8_1646{border:1px solid var(--line);border-radius:var(--radius-xs);background:var(--surface-soft);width:100%;min-width:0;min-height:52px;color:var(--text);text-align:left;cursor:pointer;align-items:flex-start;gap:11px;padding:10px 12px;transition:border-color .15s,background-color .15s;display:flex}._optionButton_13zr8_1646:hover:not(:disabled){border-color:var(--amber);background:var(--amber-soft)}._optionButton_13zr8_1646:disabled{cursor:default}._optionLetter_13zr8_1672{border:1px solid var(--line-strong);width:26px;height:26px;color:var(--muted);font-family:var(--font-serif);border-radius:50%;flex:0 0 26px;place-items:center;font-size:13px;line-height:1;display:grid}._optionSelected_13zr8_1686{border-color:var(--amber);background:var(--amber-soft)}._optionSelected_13zr8_1686 ._optionLetter_13zr8_1672,._optionCorrect_13zr8_1692 ._optionLetter_13zr8_1672{border-color:var(--amber);color:var(--amber)}._optionCorrect_13zr8_1692{border-color:var(--text-soft);background:var(--surface);box-shadow:inset 2px 0 0 var(--text-soft)}._optionWrong_13zr8_1703{border-color:var(--danger);background:var(--surface-soft)}._optionWrong_13zr8_1703 ._optionLetter_13zr8_1672,._optionResultWrong_13zr8_1709{color:var(--danger)}._optionContent_13zr8_1713{min-width:0;color:var(--text);overflow-wrap:anywhere;flex:1;font-size:15px;line-height:1.75}._optionContent_13zr8_1713>span{margin-top:6px;display:block}._optionExplanation_13zr8_1727{border-top:1px solid var(--line);color:var(--text-soft);margin-top:7px;padding-top:7px;font-size:16px;line-height:1.8;display:block}._optionResult_13zr8_1709,._optionResultWrong_13zr8_1709{color:var(--text-soft);white-space:nowrap;align-self:center;font-size:12px}._optionResult_13zr8_1709:before,._optionResultWrong_13zr8_1709:before{margin-right:4px}._optionResult_13zr8_1709:before{content:"✓"}._optionResultWrong_13zr8_1709:before{content:"×"}._math_13zr8_1753{width:100%;min-width:0;max-width:100%;color:var(--text);scrollbar-color:var(--line-strong) var(--clear);scrollbar-width:thin;padding:7px 0;font-size:clamp(17px,2vw,21px);overflow:auto hidden}._math_13zr8_1753 .katex-display{text-align:left;width:max-content;max-width:100%;margin:.3em 0}._math_13zr8_1753 .katex-display>.katex{max-width:100%;display:inline-block}._math_13zr8_1753 .katex{white-space:nowrap}._mathFallback_13zr8_1782{max-width:100%;color:var(--text);font-family:var(--font-serif);overflow-wrap:anywhere;padding:8px 0;font-size:16px;line-height:1.65;overflow-x:auto}._mathText_13zr8_1793{min-width:0;color:var(--text-soft);overflow-wrap:anywhere;font-size:16px;line-height:1.8}._mathOverflowHint_13zr8_1801{color:var(--muted);margin:1px 0 7px;font-size:12px;line-height:1.5;display:block}._answerBlock_13zr8_1809{border-top:1px solid var(--line);margin-top:23px;padding-top:17px}._answerHeading_13zr8_1815{align-items:center;gap:10px;display:flex}._answerCheck_13zr8_1821{border:1px solid var(--line-strong);width:30px;height:30px;color:var(--amber);border-radius:50%;flex:none;place-items:center;font-size:14px;display:grid}._answerCheckCorrect_13zr8_1833{border-color:var(--text-soft);background:color-mix(in srgb, var(--text-soft) 8%, var(--surface));color:var(--text-soft)}._answerCheckWrong_13zr8_1839{border-color:var(--danger);background:color-mix(in srgb, var(--danger) 9%, var(--surface));color:var(--danger)}._answerHeading_13zr8_1815 small{color:var(--muted);letter-spacing:.08em;font-size:12px;line-height:1.4;display:block}._answerHeading_13zr8_1815 strong{color:var(--text);margin-top:2px;font-size:15px;font-weight:500;display:block}._answerFormula_13zr8_1861{border:1px solid var(--line);background:var(--surface-soft);margin:12px 0;padding:13px 14px;font-size:clamp(18px,2vw,22px)}._detailGrid_13zr8_1869,._libraryDetailGrid_13zr8_1870{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;display:grid}._detailGrid_13zr8_1869>div,._libraryDetailGrid_13zr8_1870>div{border:1px solid var(--line);background:var(--surface-soft);min-width:0;padding:12px}._detailLabel_13zr8_1481{color:var(--amber);margin:0 0 8px;font-size:14px;font-weight:500;line-height:1.5;display:block}._detailGrid_13zr8_1869 p,._libraryDetailGrid_13zr8_1870 p{color:var(--text-soft);overflow-wrap:anywhere;margin:6px 0 0;font-size:14px;line-height:1.75}._detailDisclosure_13zr8_1902,._libraryDetails_13zr8_1903,._reviewHistory_13zr8_1904{border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-top:12px}._detailDisclosure_13zr8_1902 summary,._libraryDetails_13zr8_1903 summary,._reviewHistory_13zr8_1904 summary{min-height:48px;color:var(--text-soft);cursor:pointer;justify-content:space-between;align-items:center;gap:12px;font-size:14px;list-style:none;display:flex}._detailDisclosure_13zr8_1902 summary::-webkit-details-marker{display:none}._libraryDetails_13zr8_1903 summary::-webkit-details-marker{display:none}._reviewHistory_13zr8_1904 summary::-webkit-details-marker{display:none}._detailDisclosure_13zr8_1902 summary:after,._libraryDetails_13zr8_1903 summary:after{color:var(--amber);content:"+";font-family:var(--font-ui);font-size:19px;line-height:1}._detailDisclosure_13zr8_1902[open] summary:after,._libraryDetails_13zr8_1903[open] summary:after{content:"−"}._detailDisclosure_13zr8_1902>div,._libraryDetails_13zr8_1903>div{padding:0 0 13px}._detailDisclosure_13zr8_1902 p{color:var(--text-soft);margin:5px 0 13px;font-size:16px;line-height:1.8}._ratingArea_13zr8_1492{border-top:1px solid var(--line);margin-top:18px;padding-top:14px}._feedbackButtons_13zr8_1962{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;display:grid}._feedbackButton_13zr8_1498{border:1px solid var(--line-strong);border-radius:var(--radius-xs);background:var(--surface);min-width:0;min-height:52px;color:var(--text);cursor:pointer;justify-content:center;align-items:center;gap:9px;padding:8px 12px;font-size:15px;transition:border-color .15s,background-color .15s;display:inline-flex}._feedbackButton_13zr8_1498>span{font-family:var(--font-ui);font-size:17px;line-height:1}._feedbackRemember_13zr8_1991:hover:not(:disabled){border-color:var(--text-soft);background:var(--surface-soft)}._feedbackForget_13zr8_1996{color:var(--danger)}._feedbackForget_13zr8_1996:hover:not(:disabled){border-color:var(--danger);background:color-mix(in srgb, var(--danger) 7%, var(--surface))}._feedbackButton_13zr8_1498:disabled{cursor:not-allowed;opacity:.55}._studyResult_13zr8_2010{border:1px solid var(--line);background:var(--surface-soft);gap:9px;margin-top:18px;padding:13px 14px;display:grid}._studyResultHeading_13zr8_2019{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:5px 12px;display:flex}._studyResultHeading_13zr8_2019 strong{color:var(--text);font-size:15px;font-weight:500}._studyResultHeading_13zr8_2019 span{color:var(--muted);font-size:12px}._studyResult_13zr8_2010 p{color:var(--text-soft);margin:0;font-size:13px;line-height:1.65}._studyResult_13zr8_2010>button{justify-self:start;min-width:140px}._fineRatingGrid_13zr8_2050{grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;padding-bottom:12px;display:grid}._ratingHeading_13zr8_2057{gap:4px;margin-bottom:9px;display:grid}._ratingHeading_13zr8_2057 strong{color:var(--text);font-size:14px;font-weight:500}._ratingHeading_13zr8_2057 span{color:var(--muted);font-size:12px;line-height:1.55}._ratingGrid_13zr8_2075{grid-template-columns:repeat(4,minmax(0,1fr));gap:7px;display:grid}._ratingButton_13zr8_785{border:1px solid color-mix(in srgb, var(--rating-accent) 44%, var(--line));border-radius:var(--radius-xs);background:color-mix(in srgb, var(--rating-accent) 4%, var(--surface));min-width:0;min-height:62px;color:var(--text);text-align:left;cursor:pointer;align-items:center;gap:9px;padding:8px 10px;transition:border-color .15s,background-color .15s;display:flex}._ratingButton_13zr8_785:hover:not(:disabled){border-color:var(--rating-accent);background:color-mix(in srgb, var(--rating-accent) 10%, var(--surface))}._ratingAgain_13zr8_2102{--rating-accent:var(--danger)}._ratingHard_13zr8_2103{--rating-accent:var(--muted)}._ratingGood_13zr8_2104{--rating-accent:var(--text-soft)}._ratingEasy_13zr8_2105{--rating-accent:var(--amber)}._ratingGlyph_13zr8_2107{border:1px solid color-mix(in srgb, var(--rating-accent) 54%, var(--line));width:29px;height:29px;color:var(--rating-accent);border-radius:50%;flex:none;place-items:center;display:grid}._ratingGlyph_13zr8_2107 svg{width:17px;height:17px}._ratingText_13zr8_2123{gap:3px;min-width:0;display:grid}._ratingButton_13zr8_785 strong{color:var(--text);font-size:13px;font-weight:500;line-height:1.35}._ratingText_13zr8_2123 small{color:var(--muted);font-size:12px;line-height:1.35}._recognitionNote_13zr8_2142,._studyFootnote_13zr8_2143{color:var(--muted);margin:14px 0 0;font-size:13px;line-height:1.7}._sessionMissing_13zr8_2150{border:1px solid var(--line);background:var(--surface);justify-items:start;gap:8px;padding:34px 24px;display:grid}._missingIcon_13zr8_2159{color:var(--amber);font-size:24px}._sessionMissing_13zr8_2150 h1{margin:0;font-size:24px;font-weight:400}._sessionMissing_13zr8_2150 p{max-width:550px;color:var(--text-soft);margin:0 0 10px;font-size:14px;line-height:1.75}._libraryView_13zr8_2178,._settingsView_13zr8_2179{min-width:0}._libraryHero_13zr8_2183{border-bottom:1px solid var(--line);justify-content:space-between;align-items:end;gap:20px;padding:6px 4px 20px;display:flex}._libraryHero_13zr8_2183 h1{color:var(--text);font-family:var(--font-serif);margin:7px 0 4px;font-size:clamp(28px,4vw,36px);font-weight:400;line-height:1.3}._libraryHero_13zr8_2183 p{max-width:650px;color:var(--text-soft);margin:0;font-size:14px;line-height:1.75}._libraryCount_13zr8_2209{color:var(--text);font-family:var(--font-serif);white-space:nowrap;font-size:24px}._libraryCount_13zr8_2209 small{color:var(--muted);font-family:var(--font-serif);font-size:12px}._libraryToolbar_13zr8_2222{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;margin:14px 0;display:flex}._searchBox_13zr8_2231{border:1px solid var(--line);background:var(--surface);min-width:min(340px,100%);min-height:46px;color:var(--muted);align-items:center;gap:9px;padding:0 11px;display:flex}._searchBox_13zr8_2231>span{color:var(--amber);font-size:18px}._searchBox_13zr8_2231 input{background:var(--clear);width:100%;min-width:0;min-height:42px;color:var(--text);border:0;outline:0;font-size:14px}._searchBox_13zr8_2231 input::placeholder{color:var(--muted);opacity:1}._searchBox_13zr8_2231 kbd{color:var(--muted);font-family:var(--font-ui);flex:none;font-size:12px}._filterSummary_13zr8_2271{color:var(--muted);font-size:13px;line-height:1.55}._emptyState_13zr8_2277{border:1px solid var(--line);background:var(--surface);text-align:center;justify-items:center;gap:8px;padding:42px 20px;display:grid}._emptyState_13zr8_2277>span{color:var(--amber);font-size:24px}._emptyState_13zr8_2277 h2{color:var(--text);margin:0;font-size:19px;font-weight:400}._emptyState_13zr8_2277 p{max-width:620px;color:var(--text-soft);margin:0;font-size:14px;line-height:1.75}._emptyState_13zr8_2277 ._textButton_13zr8_1159{margin-top:4px}._libraryList_13zr8_2311{gap:10px;display:grid}._formulaCard_13zr8_2316{border:1px solid var(--line);background:var(--surface);min-width:0;padding:16px 18px 13px}._formulaCardMeta_13zr8_2323{flex-wrap:wrap;align-items:center;gap:6px;margin-bottom:12px;display:flex}._lessonBadge_13zr8_2331,._statusYes_13zr8_2332,._statusPending_13zr8_2333,._statusNo_13zr8_2334,._pausedBadge_13zr8_2335,._tagBadge_13zr8_2336{border:1px solid var(--line);min-height:26px;color:var(--text-soft);border-radius:99px;align-items:center;padding:2px 8px;font-size:12px;line-height:1.35;display:inline-flex}._lessonBadge_13zr8_2331,._tagBadge_13zr8_2336{background:var(--surface-soft)}._statusYes_13zr8_2332,._statusPending_13zr8_2333,._statusNo_13zr8_2334,._pausedBadge_13zr8_2335{border-color:var(--line-strong);color:var(--text-soft)}._statusYes_13zr8_2332{border-color:color-mix(in srgb, var(--text-soft) 55%, var(--line));background:color-mix(in srgb, var(--text-soft) 7%, var(--surface))}._statusPending_13zr8_2333{border-color:color-mix(in srgb, var(--amber) 65%, var(--line));background:var(--amber-soft);color:var(--amber)}._statusNo_13zr8_2334{color:var(--muted)}._statusYes_13zr8_2332:before,._statusPending_13zr8_2333:before,._statusNo_13zr8_2334:before,._pausedBadge_13zr8_2335:before{margin-right:5px;font-size:11px;line-height:1}._statusYes_13zr8_2332:before{content:"✓"}._statusPending_13zr8_2333:before{content:"◷"}._statusNo_13zr8_2334:before{content:"—"}._pausedBadge_13zr8_2335:before{content:"∥"}._pausedBadge_13zr8_2335{color:var(--muted);border-style:dashed}._formulaCardBody_13zr8_2395{justify-content:space-between;align-items:flex-start;gap:18px;min-width:0;display:flex}._formulaCardMain_13zr8_2403{flex:1;min-width:0}._formulaCardMain_13zr8_2403 h2{color:var(--text);font-family:var(--font-serif);margin:0 0 4px;font-size:18px;font-weight:400;line-height:1.5}._formulaIntuition_13zr8_2417{color:var(--text-soft);font-size:16px;line-height:1.8}._libraryFormula_13zr8_2423{margin-top:8px;padding:6px 0;font-size:clamp(17px,2vw,21px)}._formulaCardActions_13zr8_2429{flex:none;align-items:center;gap:5px;display:flex}._iconAction_13zr8_786{border:1px solid var(--line);background:var(--surface);width:44px;height:44px;color:var(--muted);cursor:pointer;border-radius:50%;place-items:center;font-size:17px;transition:border-color .15s,color .15s,background-color .15s;display:grid}._iconAction_13zr8_786:hover:not(:disabled),._iconActionActive_13zr8_2451{border-color:var(--amber);background:var(--amber-soft);color:var(--amber)}._libraryDetails_13zr8_1903{margin-top:10px}._libraryDetails_13zr8_1903 summary{min-height:46px;font-size:13px}._libraryDetailGrid_13zr8_1870{padding-top:5px}._applicabilityEvidence_13zr8_2470{border-left:1px solid var(--amber);background:var(--surface-soft);margin-top:9px;padding:12px}._formulaCardFoot_13zr8_2477{border-top:1px solid var(--line);color:var(--muted);flex-wrap:wrap;justify-content:space-between;gap:5px 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small{color:var(--muted);font-size:12px;line-height:1.5}._historyEvent_13zr8_2513 small i{color:var(--line-strong);padding:0 3px;font-style:normal}._settingsView_13zr8_2179>._libraryHero_13zr8_2183{margin-bottom:15px}._settingsSeal_13zr8_2564{border:1px solid var(--line-strong);width:44px;height:44px;color:var(--amber);border-radius:50%;place-items:center;font-size:17px;display:grid}._settingsCard_13zr8_643{margin-bottom:13px;padding:19px 20px}._settingsCardHead_13zr8_2580{border-bottom:1px solid var(--line);align-items:flex-start;gap:11px;margin-bottom:13px;padding-bottom:12px;display:flex}._settingsIcon_13zr8_2589{border:1px solid var(--line);width:34px;height:34px;color:var(--amber);border-radius:50%;flex:none;place-items:center;font-size:15px;display:grid}._settingsCardHead_13zr8_2580 h2{color:var(--text);margin:0;font-size:17px;font-weight:400}._settingsCardHead_13zr8_2580 p{color:var(--muted);margin:3px 0 0;font-size:13px;line-height:1.6}._settingsRow_13zr8_2615,._backupActions_13zr8_2616,._backupImport_13zr8_2617{border-bottom:1px solid var(--line);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px 16px;min-height:58px;padding:10px 0;display:flex}._settingsRow_13zr8_2615>div:first-child,._backupActions_13zr8_2616>div,._backupImport_13zr8_2617>div{gap:3px;min-width:0;display:grid}._settingsRow_13zr8_2615 strong,._backupActions_13zr8_2616 strong,._backupImport_13zr8_2617 strong{color:var(--text);font-size:14px;font-weight:500}._settingsRow_13zr8_2615 small,._backupActions_13zr8_2616 small,._backupImport_13zr8_2617 small{color:var(--muted);font-size:12px;line-height:1.55}._timezoneValue_13zr8_2652{color:var(--text);text-align:right;gap:2px;font-size:14px;display:grid}._timezoneValue_13zr8_2652 small{color:var(--muted);font-size:12px}._settingsActions_13zr8_2665{flex-wrap:wrap;align-items:center;gap:8px;padding-top:13px;display:flex}._backupActions_13zr8_2616,._backupImport_13zr8_2617{min-height:70px}._hiddenInput_13zr8_2678{display:none}._restorePreview_13zr8_2682{border:1px solid var(--line-strong);background:var(--surface-soft);margin-top:13px;padding:14px}._previewHeader_13zr8_2689{align-items:center;gap:9px;display:flex}._previewCheck_13zr8_2695{border:1px solid var(--amber);width:28px;height:28px;color:var(--amber);border-radius:50%;flex:none;place-items:center;font-size:13px;display:grid}._previewHeader_13zr8_2689 strong{color:var(--text);font-size:14px;font-weight:500;display:block}._previewHeader_13zr8_2689 small{color:var(--muted);overflow-wrap:anywhere;margin-top:2px;font-size:12px;display:block}._previewGrid_13zr8_2722{grid-template-columns:repeat(4,minmax(0,1fr));gap:7px;margin:12px 0 10px;display:grid}._previewGrid_13zr8_2722 span{border:1px solid var(--line);background:var(--surface);min-width:0;color:var(--muted);overflow-wrap:anywhere;gap:3px;padding:9px;font-size:12px;line-height:1.45;display:grid}._previewGrid_13zr8_2722 b{color:var(--text);font-size:14px;font-weight:500}._restorePreview_13zr8_2682>p{color:var(--text-soft);overflow-wrap:anywhere;margin:6px 0;font-size:13px;line-height:1.65}._restorePreview_13zr8_2682 ._versionNote_13zr8_2756{color:var(--amber)}._restorePreview_13zr8_2682 ._buttonDanger_13zr8_783{margin-top:8px}._backupFootnote_13zr8_2764{color:var(--muted);align-items:flex-start;gap:9px;margin-top:13px;display:flex}._backupFootnote_13zr8_2764>span{color:var(--amber);flex:none;font-size:14px}._backupFootnote_13zr8_2764 p{margin:0;font-size:12px;line-height:1.7}._coverageSettings_13zr8_2784{margin-top:13px}._coverageRows_13zr8_2788{grid-template-columns:repeat(2,minmax(0,1fr));gap:0 18px;display:grid}._coverageRows_13zr8_2788>div{border-bottom:1px solid var(--line);min-height:42px;color:var(--text-soft);justify-content:space-between;align-items:center;gap:8px;font-size:13px;display:flex}._coverageRows_13zr8_2788 strong{color:var(--text);text-align:right;font-size:12px;font-weight:400}._coverageDisclaimer_13zr8_2812{color:var(--muted);margin:12px 0 0;font-size:12px;line-height:1.7}._footer_13zr8_2819{border-top:1px solid var(--line);width:min(1152px,100% - 48px);min-height:60px;color:var(--muted);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:6px 18px;margin:0 auto;padding:12px 0;font-size:12px;display:flex}._alert_13zr8_2834{border:1px solid var(--danger);background:var(--surface);color:var(--text);align-items:center;gap:9px;margin:0 0 13px;padding:10px 12px;display:flex}._alert_13zr8_2834>span{border:1px solid var(--danger);width:23px;height:23px;color:var(--danger);border-radius:50%;flex:none;place-items:center;display:grid}._alert_13zr8_2834 p{min-width:0;color:var(--text-soft);overflow-wrap:anywhere;flex:1;margin:0;font-size:13px;line-height:1.6}._alert_13zr8_2834 button{background:var(--clear);width:44px;height:44px;color:var(--muted);cursor:pointer;border:0;flex:none;font-size:20px}._toast_13zr8_2877{z-index:30;border:1px solid var(--line-strong);background:var(--surface);max-width:min(440px,100vw - 36px);box-shadow:var(--shadow);color:var(--text);padding:12px 14px;font-size:13px;line-height:1.6;position:fixed;bottom:18px;right:18px}._modalBackdrop_13zr8_2892{z-index:40;background:var(--scrim);-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);place-items:center;padding:18px;display:grid;position:fixed;inset:0}._modal_13zr8_2892{border:1px solid var(--line-strong);background:var(--surface);width:min(480px,100%);max-height:min(90vh,760px);box-shadow:var(--shadow);padding:22px;overflow-y:auto}._modalMark_13zr8_2913{border:1px solid var(--amber);width:30px;height:30px;color:var(--amber);border-radius:50%;place-items:center;display:grid}._modal_13zr8_2892 h2{color:var(--text);font-family:var(--font-serif);margin:12px 0 6px;font-size:21px;font-weight:400}._modalBody_13zr8_2931 p{color:var(--text-soft);margin:8px 0;font-size:14px;line-height:1.75}._dialogMeta_13zr8_2938{border:1px solid var(--line);background:var(--surface-soft);overflow-wrap:anywhere;padding:10px;color:var(--text-soft)!important}._modalActions_13zr8_2946{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:8px;margin-top:18px;display:flex}._loading_13zr8_2955,._loadFailure_13zr8_2956{background:var(--bg);min-height:100vh;color:var(--text);text-align:center;align-content:center;justify-items:center;gap:10px;padding:24px;display:grid}._loadingMark_13zr8_2968,._loadFailure_13zr8_2956 ._brandMark_13zr8_171{border:1px solid var(--line-strong);width:48px;height:48px;color:var(--amber);border-radius:50%;place-items:center;font-size:24px;font-style:italic;display:grid}._loading_13zr8_2955 p{color:var(--muted);font-size:14px}._loadFailure_13zr8_2956 h1{color:var(--text);font-family:var(--font-serif);margin:0;font-size:23px;font-weight:400}._loadFailure_13zr8_2956 p{max-width:460px;color:var(--danger);overflow-wrap:anywhere;font-size:14px;line-height:1.7}._mobileNav_13zr8_3002,._coverageAside_13zr8_3006,._sidebarFoot_13zr8_3007,._miniProgress_13zr8_3008{display:none}@media (width<=920px){._header_13zr8_142{grid-template-columns:auto minmax(0,1fr);gap:12px 18px;padding:8px 0}._navList_13zr8_221{scrollbar-width:none;grid-area:2/1/auto/-1;justify-content:flex-start;overflow-x:auto}._navList_13zr8_221::-webkit-scrollbar{display:none}._headerRight_13zr8_300{grid-area:1/2}._sessionGrid_13zr8_673{grid-template-columns:repeat(2,minmax(0,1fr))}}@media 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(prefers-reduced-transparency:reduce){._navList_13zr8_221,._studyActionBar_13zr8_3737{-webkit-backdrop-filter:none;background:var(--surface)}}@media (prefers-reduced-motion:reduce){button:active:not(:disabled){scale:none}}html[data-motion=off] button:active:not(:disabled){scale:none}@supports not ((-webkit-backdrop-filter:blur(1px)) or (backdrop-filter:blur(1px))){._studyPanel_13zr8_641,._scopePanel_13zr8_642,._settingsCard_13zr8_643,._formulaCard_13zr8_2316,._emptyState_13zr8_2277,._sessionMissing_13zr8_2150,._modal_13zr8_2892,._studyActionBar_13zr8_3737,._navList_13zr8_221{background:var(--surface)}}@media (prefers-reduced-transparency:reduce){._studyPanel_13zr8_641,._scopePanel_13zr8_642,._settingsCard_13zr8_643,._formulaCard_13zr8_2316,._emptyState_13zr8_2277,._sessionMissing_13zr8_2150,._modal_13zr8_2892,._studyActionBar_13zr8_3737,._navList_13zr8_221{-webkit-backdrop-filter:none;background:var(--surface)}}._root_rvaya_1{border:1px solid var(--glass-border,var(--line));background:var(--glass-fill,var(--surface));-webkit-backdrop-filter:blur(24px)saturate(1.12);backdrop-filter:blur(24px)saturate(1.12);width:100%;min-width:0;box-shadow:var(--glass-shadow,0 10px 32px #0000001f);color:var(--text);border-radius:24px;position:relative;overflow:hidden}._rotor_rvaya_17{min-width:0;transition:height .18s cubic-bezier(.2,.7,.2,1);position:relative;overflow:hidden}._face_rvaya_24{box-sizing:border-box;overflow-wrap:anywhere;min-width:0;min-height:20rem;color:var(--text);padding:32px;display:flex;position:relative}._front_rvaya_35[aria-hidden=true]{display:none}._faceContent_rvaya_39{align-self:stretch;width:100%;min-width:0}._face_rvaya_24 [data-study-focus]:focus-visible{outline:2px solid var(--amber);outline-offset:4px;border-radius:4px}._root_rvaya_1[data-phase=leaving],._root_rvaya_1[data-phase=left]{pointer-events:none}._root_rvaya_1[data-phase=left]{visibility:hidden}._root_rvaya_1[data-phase=idle] 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button{border-radius:var(--radius-xs);min-height:44px;color:var(--muted);font:inherit;font-family:var(--font-serif);cursor:pointer;background:0 0;border:0;padding:10px 8px;font-size:15px;line-height:1.4;transition:color .16s,background-color .16s,transform .16s}._modePicker_ehnui_72 button[aria-pressed=true]{background:color-mix(in srgb, var(--text) 8%, transparent);color:var(--text)}._primary_ehnui_102{background:var(--primary-fill,var(--text));width:100%;min-height:56px;color:var(--primary-text,var(--bg));font:inherit;font-family:var(--font-serif);cursor:pointer;border:0;border-radius:15px;justify-content:center;align-items:center;gap:14px;padding:14px 20px;font-size:18px;font-weight:500;line-height:1.4;transition:background-color .16s,transform .16s;display:flex;box-shadow:0 3px 12px #00000014}._primary_ehnui_102 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svg{stroke:currentColor;stroke-width:1.4px;stroke-linecap:round;stroke-linejoin:round;opacity:.65;flex:0 0 16px;width:16px;height:16px}._secondary_ehnui_139 button:hover{background:color-mix(in srgb, var(--text) 4%, transparent);color:var(--text)}@media (width<=480px){._home_ehnui_1{margin-top:10px;padding:20px 18px}._scope_ehnui_14{gap:6px;padding-bottom:15px}._intro_ehnui_50{margin:21px 0 18px}._title_ehnui_54{font-size:32px}._hint_ehnui_64{margin-top:7px;font-size:13px}._stats_ehnui_169{margin-top:20px}._stat_ehnui_169{padding:0 4px}._secondary_ehnui_139{gap:8px;margin-top:20px;padding-top:4px}}@media (width<=350px){._home_ehnui_1{padding:17px 14px}._intro_ehnui_50{margin:18px 0 16px}._title_ehnui_54{font-size:30px}}@media (prefers-reduced-motion:reduce){._primary_ehnui_102,._modePicker_ehnui_72 button,._secondary_ehnui_139 button{transition:none}._primary_ehnui_102:active:not(:disabled),._modePicker_ehnui_72 button:active:not(:disabled),._secondary_ehnui_139 button:active{transform:none}}@media (prefers-reduced-transparency:reduce){._home_ehnui_1{background:var(--surface);-webkit-backdrop-filter:none}._modePicker_ehnui_72{background:var(--surface-soft)}._modePicker_ehnui_72 button[aria-pressed=true]{background:var(--surface-raised)}}._recallBlank_1phb0_1{width:100%;min-width:0;color:var(--text);gap:10px;display:grid}._sourceFormula_1phb0_9{min-width:0}._context_1phb0_13{min-width:0;color:var(--muted)}._context_1phb0_13 .katex{color:var(--text-soft);font-size:.85em}._blank_1phb0_23{text-align:left;border:0;border:1px solid var(--line-strong);border-radius:var(--radius-xs);background:var(--surface-soft);width:100%;min-width:0;min-height:66px;color:var(--amber);font-family:var(--font-serif);cursor:pointer;padding:4px 12px;font-size:22px;line-height:1.2;transition:background-color .12s,border-color .12s;display:block}._blank_1phb0_23:hover:not(:disabled){border-bottom-color:var(--amber);background:var(--amber-soft)}._blank_1phb0_23:focus-visible{outline:2px solid var(--amber);outline-offset:3px}._blank_1phb0_23:disabled{color:var(--muted);cursor:not-allowed}@media (width<=390px){._blank_1phb0_23{min-height:62px}}@media (prefers-reduced-motion:reduce){._blank_1phb0_23{transition:none}}._source_1i6ce_1{text-align:left;min-width:0;color:var(--text);font-family:var(--font-serif);font-size:19px;line-height:1.85}._position_1i6ce_2{color:var(--muted);flex-wrap:wrap;gap:4px 12px;margin:0 0 12px;font-size:12px;line-height:1.6;display:flex}._position_1i6ce_2 span{color:var(--answer)}._blocks_1i6ce_4{gap:12px;min-width:0;display:grid}._block_1i6ce_4{white-space:pre-line;overflow-wrap:break-word;min-width:0;max-width:100%}._source_1i6ce_1 .katex{font-size:1.05em}._source_1i6ce_1 .lecture-active-hole{color:var(--answer)}._source_1i6ce_1 .katex-display{text-align:left;margin:.35em 0}._source_1i6ce_1 .katex-display>.katex{text-align:left}._source_1i6ce_1 img{background:#fff;border-radius:11px;max-width:100%;height:auto;display:block}._current_1i6ce_11{border-left:2px solid var(--answer);padding-left:12px}._reveal_1i6ce_12{width:100%;min-width:0;min-height:66px;color:inherit;font:inherit;text-align:left;background:var(--button-fill);cursor:pointer;white-space:pre-line;border:1px solid #0000;border-radius:16px;padding:14px;display:block}._reveal_1i6ce_12:focus-visible{outline:2px solid var(--amber);outline-offset:3px}._reveal_1i6ce_12:hover{border-color:var(--line-strong);background:color-mix(in srgb, var(--amber) 8%, var(--surface-soft))}._expand_1i6ce_19{width:100%;min-height:44px;color:var(--muted);font:inherit;cursor:pointer;background:0 0;border:1px solid #0000;border-radius:11px;margin-top:14px;padding:10px 12px;font-size:13px;display:block}._expand_1i6ce_19:hover{color:var(--amber)}._errata_1i6ce_21{border-top:1px solid var(--glass-border);color:var(--muted);margin-top:12px;padding-top:8px;font-size:13px}._errata_1i6ce_21 summary{cursor:pointer;align-items:center;min-height:44px;display:flex}._catalog_1i6ce_23{border:1px solid var(--glass-border);background:var(--glass-fill);box-shadow:var(--glass-shadow);-webkit-backdrop-filter:blur(24px)saturate(1.12);border-radius:24px;margin:20px 0;padding:16px}._catalog_1i6ce_23>summary{cursor:pointer;min-height:44px;color:var(--text-soft)}._catalogTitle_1i6ce_25{color:var(--text);text-align:left;font:inherit;border:0;border-bottom:1px solid var(--glass-border);cursor:pointer;background:0 0;border-radius:10px;width:100%;min-height:48px;padding:14px 8px}._catalogTitle_1i6ce_25[aria-expanded=true]{color:var(--amber);background:var(--button-fill)}._catalogBody_1i6ce_27{min-width:0;padding:16px 8px 20px}@media (width<=600px){._source_1i6ce_1{font-size:18px;line-height:1.8}._blocks_1i6ce_4{gap:10px}._position_1i6ce_2{font-size:11px}._catalog_1i6ce_23{border-radius:20px;padding:13px}._catalogBody_1i6ce_27{padding-left:0;padding-right:0}._reveal_1i6ce_12{border-radius:13px;padding:10px}}@media (prefers-reduced-transparency:reduce){._catalog_1i6ce_23{-webkit-backdrop-filter:none;background:var(--surface)}}@supports not ((-webkit-backdrop-filter:blur(1px)) or (backdrop-filter:blur(1px))){._catalog_1i6ce_23{background:var(--surface)}}._notice_etc8j_1{max-width:1040px;font-family:var(--font-ui);color:var(--muted);margin:16px auto;padding:0 20px 20px;font-size:12px}._cached_etc8j_2{align-items:center;gap:7px;display:flex}._cached_etc8j_2:before{content:"";background:var(--good);border-radius:50%;flex-shrink:0;width:5px;height:5px}._update_etc8j_4{border:1px solid var(--glass-border);background:var(--glass-fill);border-radius:16px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;margin-top:12px;padding:12px 14px;display:flex}._update_etc8j_4 button{background:var(--primary-fill);min-height:44px;color:var(--primary-text);cursor:pointer;border:1px solid #0000;border-radius:11px;padding:8px 16px}@media (width<=620px){._notice_etc8j_1{padding:0 16px calc(100px + env(safe-area-inset-bottom,0px));margin-top:0;font-size:11px}._update_etc8j_4{align-items:flex-start}}