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both}.wrongbook_head__Ui5os{display:flex;align-items:center;gap:var(--space-3);padding-bottom:var(--space-3);border-bottom:1px solid var(--line)}.wrongbook_mark__fdCGV{display:inline-flex;align-items:center;justify-content:center;width:2rem;height:2rem;border-radius:var(--radius-sm);background:var(--gold-wash);color:var(--gold);flex:none}.wrongbook_name___fH5m{font-family:var(--font-display);font-size:var(--text-lg);font-weight:700;letter-spacing:.04em}.wrongbook_countChip__oDeil{margin-left:auto;background:var(--gold-wash);color:var(--gold);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.wrongbook_list__yddwy{list-style:none;margin:var(--space-3) 0 0;padding:0;display:grid;grid-gap:var(--space-2);gap:var(--space-2)}.wrongbook_item__aWFPg{border:1px solid var(--line);border-radius:var(--radius-md);background:var(--paper-raised);overflow:hidden}.wrongbook_itemBtn__BRWpv{display:flex;align-items:center;gap:var(--space-2);width:100%;min-height:44px;padding:var(--space-2) var(--space-3);text-align:left;background:none;border:none;cursor:pointer;font:inherit;color:inherit}.wrongbook_itemBtn__BRWpv:hover{background:var(--pine-wash)}.wrongbook_itemFrom__8zG79{flex:none;padding:.1em .55em;border-radius:var(--radius-pill);background:var(--sky-wash);color:var(--sky);font-size:var(--text-xs);font-weight:600}.wrongbook_itemQ__mCwou{flex:1 1;min-width:0;font-size:var(--text-sm);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.wrongbook_itemChevron__b2WX6{flex:none;display:inline-flex;color:var(--ink-soft)}.wrongbook_itemBody__K_X1H{padding:var(--space-2) var(--space-3) var(--space-3);border-top:1px dashed var(--line);display:grid;grid-gap:var(--space-2);gap:var(--space-2)}.wrongbook_mineRow__UFxuH{font-size:var(--text-sm);color:var(--ink-soft)}.wrongbook_mine__KuMoc{font-weight:700;color:var(--rust);text-decoration:line-through;text-decoration-thickness:1.5px;padding-inline:.15em}.wrongbook_retryRow__Um1Xh{display:flex;gap:var(--space-2)}.wrongbook_retryInput__2K4Ir{flex:1 1;min-width:0;min-height:44px}.wrongbook_noteRow__0kyvM{display:flex;align-items:flex-start;gap:.4em;font-size:var(--text-sm);color:var(--pine-deep);background:var(--pine-wash);border-radius:var(--radius-sm);padding:var(--space-2) var(--space-3)}.wrongbook_noteRow__0kyvM svg{flex:none;margin-top:.15em;color:var(--gold)}.wrongbook_revealRow__P6JuZ{font-size:var(--text-sm);background:var(--gold-wash);border-radius:var(--radius-sm);padding:var(--space-2) var(--space-3)}.wrongbook_fixedRow__y5pl0{display:flex;align-items:center;gap:.4em;font-weight:700;color:var(--pine);font-size:var(--text-sm)}.wrongbook_moreBtn__UY_Sf{margin-top:var(--space-3);width:100%}.wrongbook_empty__QuGp0{margin-top:var(--space-4);display:grid;justify-items:center;grid-gap:var(--space-2);gap:var(--space-2);padding:var(--space-5) var(--space-4);border:1.5px dashed var(--line-strong);border-radius:var(--radius-md);text-align:center}.wrongbook_emptyMark__0E5xY{display:inline-flex;align-items:center;justify-content:center;width:3rem;height:3rem;border-radius:50%;background:var(--gold-wash);color:var(--gold)}.wrongbook_emptyTitle__zo9Bn{font-weight:700}.wrongbook_emptyNote__CC2Bk{font-size:var(--text-sm);color:var(--ink-soft);line-height:1.8}.wrongbook_fixedBlock__S_qII{margin-top:var(--space-3);border-top:1px solid var(--line);padding-top:var(--space-2)}.wrongbook_fixedToggle__rSC4G{display:inline-flex;align-items:center;gap:.35em;min-height:44px;padding:0 var(--space-2);background:none;border:none;cursor:pointer;font:inherit;font-size:var(--text-sm);font-weight:600;color:var(--pine-deep)}.wrongbook_fixedToggle__rSC4G:hover{color:var(--pine)}.wrongbook_fixedList__uy7os{list-style:none;margin:var(--space-1) 0 0;padding:0;display:grid;grid-gap:var(--space-1);gap:var(--space-1)}.wrongbook_fixedItem__zuNUS{display:flex;align-items:center;gap:var(--space-2);font-size:var(--text-sm);color:var(--ink-soft);padding:var(--space-1) var(--space-2)}.wrongbook_fixedQ__WqroW{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}@keyframes wrongbook_riseIn__5YJYE{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media (prefers-reduced-motion:reduce){.wrongbook_panel__35uQh{animation:none}}.panels_pane__wSy1S{display:flex;flex-direction:column;min-width:0;padding:var(--space-6)}.panels_paneHead__qJEUM{display:flex;align-items:center;justify-content:space-between;gap:var(--space-3);padding-bottom:var(--space-3);border-bottom:1px solid var(--line);margin-bottom:var(--space-4)}.panels_paneTitle__M2rvn{display:inline-flex;align-items:center;gap:.5em;font-family:var(--font-display);font-weight:700;font-size:var(--text-lg);letter-spacing:.045em;color:var(--ink)}.panels_paneTitle__M2rvn>svg{color:var(--pine);flex:none}.panels_infoCard__qn90d{display:flex;flex-direction:column;gap:var(--space-4);padding:var(--space-4);min-width:0}.panels_infoThumb__eRN9w{position:relative;flex:1 1;width:100%;min-height:9rem;border-radius:var(--radius-md);background:var(--paper-sunken);box-shadow:var(--shadow-inset);overflow:hidden}.panels_infoThumbImg__13YZM,.panels_infoThumbSvg__vA1tB{position:absolute;inset:0;width:100%;height:100%}.panels_infoThumbImg__13YZM{object-fit:cover;object-position:top;opacity:0;transition:opacity var(--duration-normal) var(--ease-out-expo)}.panels_infoThumbImg__13YZM[data-loaded=true]{opacity:1}.panels_infoBody__Z1msv{display:flex;flex-direction:column;gap:var(--space-1);min-width:0;flex:none}.panels_infoCrumb__SqgsO{font-size:var(--text-sm);font-weight:600;letter-spacing:.08em;color:var(--ink-soft)}.panels_infoTitle__kAW_s{font-family:var(--font-display);font-weight:700;font-size:clamp(1.25rem,1.05rem + .9vw,1.65rem);line-height:1.25;letter-spacing:.03em;color:var(--ink)}.panels_infoPage__Fv0NY{font-size:var(--text-base);color:var(--ink-soft)}.panels_infoPageNum__bBMI4{font-family:var(--font-display);font-weight:700;font-feature-settings:"tnum";font-variant-numeric:tabular-nums;font-size:1.5em;color:var(--pine-deep);margin-inline:.12em}.panels_infoActions__RZkxp{display:flex;flex-wrap:wrap;gap:var(--space-2);margin-top:var(--space-3)}.panels_miniTabs__Dp_x3{display:inline-flex;flex:none;padding:3px;border-radius:var(--radius-pill);background:var(--paper-sunken);border:1px solid var(--line)}.panels_miniTab__RQAR8{padding:.25em .9em;border-radius:var(--radius-pill);font-size:var(--text-sm);font-weight:600;color:var(--ink-soft);transition:background var(--duration-fast),color var(--duration-fast),box-shadow var(--duration-fast)}.panels_miniTab__RQAR8:hover{color:var(--pine-deep)}.panels_miniTab__RQAR8[aria-pressed=true]{background:var(--paper-raised);color:var(--pine-deep);box-shadow:var(--shadow-card)}.panels_knowledgeBody___ugBe{display:flex;flex-direction:column;gap:var(--space-4);flex:1 1;min-height:0}.panels_knowledgeIntro__hpAUE{display:flex;align-items:center;gap:var(--space-3);flex-wrap:wrap}.panels_lessonName__j_BrW{font-family:var(--font-display);font-weight:700;font-size:var(--text-base);letter-spacing:.03em;color:var(--ink)}.panels_nearbyHint__7ZgO8{margin:calc(var(--space-2) * -1) 0 0;padding:var(--space-2) var(--space-3);border-left:3px solid var(--gold-bright);border-radius:0 var(--radius-sm) var(--radius-sm) 0;background:var(--gold-wash);font-size:var(--text-sm);line-height:1.6;color:var(--ink)}.panels_pointList__mXq9F{display:flex;flex-direction:column;gap:var(--space-3);list-style:none;padding:0;margin:0}.panels_pointItem__DJeFB{display:flex;gap:var(--space-3);align-items:flex-start}.panels_pointNo__5WCiF{flex:none;display:inline-flex;align-items:center;justify-content:center;width:1.5rem;height:1.5rem;margin-top:.15em;border-radius:50%;background:var(--pine-wash);border:1px solid var(--pine-soft);color:var(--pine-deep);font-family:var(--font-display);font-weight:700;font-size:var(--text-sm);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.panels_pointText__NMvtW{font-size:var(--text-base);line-height:1.9;color:var(--ink);min-width:0}.panels_keyQuote__x7rVl{margin:0;padding:var(--space-4);border:1.5px dashed color-mix(in oklab,var(--gold) 45%,transparent);border-radius:var(--radius-md);background:var(--gold-wash)}.panels_keyQuoteLabel__P0Xdu{display:inline-flex;align-items:center;gap:.4em;font-size:var(--text-sm);font-weight:700;letter-spacing:.1em;color:var(--gold);margin-bottom:var(--space-2)}.panels_keyQuoteText__509ah{font-size:var(--text-base);line-height:1.9;color:var(--ink)}.panels_sourceRow___JyYn{display:flex;align-items:center;justify-content:space-between;gap:var(--space-3);flex-wrap:wrap;margin-top:auto;padding-top:var(--space-4);border-top:1px solid var(--line)}.panels_sourceText__5ZjnK{font-size:var(--text-sm);color:var(--ink-soft)}.panels_knowledgeSkeleton__qDwID{display:flex;flex-direction:column;gap:var(--space-3)}.panels_skeletonChip__5OHV8,.panels_skeletonLineShort__hlm9J,.panels_skeletonLine__EiuEI,.panels_skeletonQuote__EfCKw{display:block;border-radius:var(--radius-sm);background:var(--paper-sunken);animation:panels_panelPulse__eF7iw 1.4s ease-in-out infinite alternate}.panels_skeletonChip__5OHV8{width:5.5rem;height:1.6rem;border-radius:var(--radius-pill)}.panels_skeletonLine__EiuEI{height:1.1rem}.panels_skeletonLineShort__hlm9J{height:1.1rem;width:70%}.panels_skeletonQuote__EfCKw{height:5rem;border-radius:var(--radius-md)}@keyframes panels_panelPulse__eF7iw{0%{opacity:1}to{opacity:.5}}.panels_knowledgeEmpty__0S8Vg{flex:1 1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-8) var(--space-4);text-align:center}.panels_emptyMark__J96O3{display:inline-flex;align-items:center;justify-content:center;width:3.25rem;height:3.25rem;border-radius:var(--radius-pill);background:var(--pine-wash);border:1.5px solid var(--pine-soft);color:var(--pine)}.panels_emptyMarkSky__RfbM7{background:var(--sky-wash);border-color:color-mix(in oklab,var(--sky) 35%,transparent);color:var(--sky)}.panels_emptyTitle__qCNdG{margin-top:var(--space-2);font-family:var(--font-display);font-weight:700;font-size:var(--text-lg);letter-spacing:.045em;color:var(--pine-deep)}.panels_emptyText__OIGxn{max-width:20rem;font-size:var(--text-sm);line-height:1.85;color:var(--ink-soft)}.panels_knowledgeEmpty__0S8Vg>button{margin-top:var(--space-3)}.panels_pageFrame__TRyzE{position:relative;flex:1 1;display:grid;place-items:center;min-height:24rem;border-radius:var(--radius-md);background:var(--paper-sunken);box-shadow:var(--shadow-inset);overflow:hidden}.panels_pageImg__0EVah{width:100%;height:auto;opacity:0;transition:opacity var(--duration-normal) var(--ease-out-expo)}.panels_pageImg__0EVah[data-loaded=true]{opacity:1}.panels_pageCorner__cVpoA{position:absolute;left:var(--space-3);bottom:var(--space-3);min-width:2rem;padding:.15em .55em;border-radius:var(--radius-sm);background:var(--pine);color:var(--paper-raised);font-family:var(--font-display);font-weight:700;font-size:var(--text-sm);font-feature-settings:"tnum";font-variant-numeric:tabular-nums;text-align:center;box-shadow:var(--shadow-card)}.panels_pageFallback__oxY5f{align-self:stretch;justify-self:stretch;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--space-2);min-height:24rem;padding:var(--space-8);text-align:center;background-color:var(--paper-sunken)}.panels_fallbackMark__x3N3G{display:inline-flex;align-items:center;justify-content:center;width:3.5rem;height:3.5rem;border-radius:var(--radius-pill);background:var(--gold-wash);border:1.5px solid color-mix(in oklab,var(--gold) 30%,transparent);color:var(--gold)}.panels_fallbackTitle__BGIOi{margin-top:var(--space-2);font-family:var(--font-display);font-weight:700;font-size:var(--text-lg);letter-spacing:.045em;color:var(--pine-deep)}.panels_fallbackText__4VxT0{max-width:22rem;font-size:var(--text-sm);line-height:1.85;color:var(--ink-soft)}.panels_fallbackChip__3XY3n{margin-top:var(--space-3)}.panels_chatPane__rdu5P{padding:var(--space-6) 0 0}.panels_chatPaneHead__yGcFs{margin-inline:var(--space-6)}.panels_chatBody__f5rJi{flex:1 1;min-height:0;display:flex;flex-direction:column}.panels_chatBody__f5rJi>.card{flex:1 1;min-height:min(30rem,68dvh);border:none;box-shadow:none;background:transparent;border-radius:0}.panels_chatDisclaimer__lQP53{padding:var(--space-2) var(--space-6) var(--space-3);border-top:1px solid var(--line);text-align:center;font-size:var(--text-sm);color:var(--ink-soft)}.panels_progressWrap__KH_CS{display:flex;flex-direction:column;align-items:flex-end;gap:.35rem;flex:none}.panels_progressLabel__g_Cc0{font-size:var(--text-sm);font-weight:600;font-feature-settings:"tnum";font-variant-numeric:tabular-nums;color:var(--ink-soft)}.panels_progressTrack__0_QkX{display:block;width:5.5rem;height:6px;border-radius:var(--radius-pill);background:var(--line);overflow:hidden}.panels_progressFill__K8jx8{display:block;height:100%;border-radius:var(--radius-pill);background:linear-gradient(90deg,var(--pine),var(--pine-deep));transition:width var(--duration-normal) var(--ease-out-expo)}.panels_practiceBody__ectHH{display:flex;flex-direction:column;gap:var(--space-4);flex:1 1;min-height:0}.panels_question__Xr7eG{display:flex;flex-direction:column;gap:var(--space-3);padding:var(--space-4);border:1px solid var(--line);border-radius:var(--radius-md);background:var(--paper)}.panels_warmupNote__z8W_v{display:flex;gap:.4em;align-items:center;align-self:flex-start;padding:.28em .7em;border-radius:var(--radius-pill);background:var(--sky-wash);border:1px solid color-mix(in oklab,var(--sky) 30%,transparent);font-size:var(--text-xs);font-weight:600;line-height:1.5;color:var(--ink)}.panels_warmupNote__z8W_v>svg{flex:none;color:var(--sky)}.panels_questionText__jEMUe{display:flex;gap:var(--space-3);align-items:flex-start;font-size:var(--text-base);line-height:1.85;color:var(--ink)}.panels_questionNo__yengQ{flex:none;display:inline-flex;align-items:center;justify-content:center;width:1.6rem;height:1.6rem;margin-top:.1em;border-radius:50%;background:var(--pine);color:var(--paper-raised);font-family:var(--font-display);font-weight:700;font-size:var(--text-sm);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.panels_answerRow__HFkkV{display:flex;flex-direction:column;gap:var(--space-3);align-items:stretch}.panels_answerInput___wOBV{width:100%;min-width:0;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.panels_answerInput___wOBV:disabled{background:var(--paper-sunken);color:var(--ink-soft)}.panels_checkBtn__Lbo_l{align-self:flex-start;white-space:nowrap;min-height:44px}.panels_checkBtn__Lbo_l:disabled{opacity:.45;cursor:default}.panels_feedback__N6htH{display:flex;gap:.5em;align-items:flex-start;padding:var(--space-2) var(--space-3);border-radius:var(--radius-sm);font-size:var(--text-sm);line-height:1.7}.panels_feedback__N6htH>svg{flex:none;margin-top:.2em}.panels_feedbackRight__rcnDn{background:var(--pine-wash);color:var(--pine-deep);border:1px solid var(--pine-soft)}.panels_feedbackWrong__0hCZd{background:var(--rust-wash);color:var(--rust);border:1px solid color-mix(in oklab,var(--rust) 30%,transparent)}.panels_feedbackReveal__HlaWX{background:var(--gold-wash);color:var(--gold);border:1px solid color-mix(in oklab,var(--gold) 30%,transparent)}.panels_revealBtn__XPk6U{align-self:flex-start;display:inline-flex;align-items:center;gap:.4em;font-size:var(--text-sm);font-weight:600;color:var(--gold);text-decoration:underline;text-underline-offset:3px;transition:color var(--duration-fast)}.panels_revealBtn__XPk6U:hover{color:var(--pine-deep)}.panels_tipRow__rbk9A{display:flex;gap:.5em;align-items:flex-start;margin-top:auto;padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);background:var(--sky-wash);border:1px solid color-mix(in oklab,var(--sky) 25%,transparent);font-size:var(--text-sm);line-height:1.75;color:var(--ink)}.panels_tipRow__rbk9A>svg{flex:none;margin-top:.2em;color:var(--sky)}@media (max-width:560px){.panels_pane__wSy1S{padding:var(--space-4)}.panels_chatPane__rdu5P{padding:var(--space-4) 0 0}.panels_chatPaneHead__yGcFs{margin-inline:var(--space-4)}.panels_chatDisclaimer__lQP53{padding-inline:var(--space-4)}.panels_infoCard__qn90d{padding:var(--space-4)}.panels_pageFallback__oxY5f,.panels_pageFrame__TRyzE{min-height:18rem}}.teachchat_chatCard__jQabd{display:flex;flex-direction:column;min-height:560px;padding:var(--space-4) var(--space-6) var(--space-4)}.teachchat_head__t8BnE{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:var(--space-2);padding-bottom:var(--space-3);border-bottom:1px solid 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