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.textbookAccordion-module__5LU4wG__unitTree{border-top:1px solid var(--color-border-subtle);background:var(--color-surface-2);flex-direction:column;gap:1px;padding:8px 12px 14px;display:flex}.textbookAccordion-module__5LU4wG__unitTreeEmpty{gap:var(--space-4);padding:var(--space-2) var(--space-1) var(--space-1);flex-direction:column;display:flex}.textbookAccordion-module__5LU4wG__unitTreeEmptyText{font-size:var(--text-sm);color:var(--color-ink-2)}.textbookAccordion-module__5LU4wG__reprocessingStrip{font-family:var(--font-sans);font-size:var(--text-sm);color:var(--color-ink-3);margin:0 0 var(--space-2);padding-bottom:var(--space-2);border-bottom:1px solid var(--color-border-subtle)}.textbookAccordion-module__5LU4wG__textbook{background:var(--color-surface-3);border:1px solid var(--color-border-subtle);border-radius:var(--radius-md);transition:border-color var(--transition-fast), box-shadow var(--transition-fast);margin-bottom:14px;position:relative;overflow:hidden}.textbookAccordion-module__5LU4wG__textbookOpen{border-color:var(--color-border);box-shadow:var(--shadow-sm)}.textbookAccordion-module__5LU4wG__textbookOpen:before{content:"";inset-inline-start:0;background:var(--color-accent);width:3px;position:absolute;top:0;bottom:0}.textbookAccordion-module__5LU4wG__textbookStrip{grid-template-columns:auto minmax(0,auto) 1fr auto;align-items:center;gap:14px;padding:16px 20px;display:grid}[data-course-rtl] .textbookAccordion-module__5LU4wG__textbookStrip{direction:rtl}.textbookAccordion-module__5LU4wG__textbookToggle{block-size:22px;inline-size:22px;color:var(--color-ink-2);cursor:pointer;transition:background var(--transition-fast), color var(--transition-fast);background:0 0;border:none;border-radius:4px;justify-content:center;align-items:center;padding:0;display:inline-flex}.textbookAccordion-module__5LU4wG__textbookToggle:hover{background:var(--color-border-subtle);color:var(--color-ink)}.textbookAccordion-module__5LU4wG__textbookToggle:focus-visible{box-shadow:0 0 0 2px var(--color-focus-ring);outline:none}.textbookAccordion-module__5LU4wG__textbookTitle{font-family:var(--font-serif);font-size:22px;line-height:1.2;font-weight:var(--font-weight-regular);letter-spacing:-.012em;color:var(--color-ink);text-overflow:ellipsis;white-space:nowrap;min-inline-size:0;margin:0;overflow:hidden}.textbookAccordion-module__5LU4wG__textbookPages{font-family:var(--font-mono);font-size:11.5px;font-weight:var(--font-weight-medium);color:var(--color-ink-3);letter-spacing:.04em;white-space:nowrap;justify-self:start}
.FrontierMarker-module__dHSbWW__root{margin-top:calc(-1 * var(--space-4));margin-bottom:var(--space-6);font-family:var(--font-sans);font-size:var(--text-sm);color:var(--color-ink-2);line-height:var(--leading-normal)}.FrontierMarker-module__dHSbWW__citableLine{margin:var(--space-6) 0 var(--space-3);font-family:var(--font-mono);font-size:var(--text-micro);letter-spacing:.12em;text-transform:uppercase;font-weight:var(--font-weight-semibold);color:var(--color-success)}.FrontierMarker-module__dHSbWW__citableEmpty{margin:var(--space-6) 0 var(--space-3);font-family:var(--font-sans);font-size:var(--text-sm);color:var(--color-ink-2);line-height:var(--leading-normal)}
.CoursePlanSection-module__SVqg_a__section{margin-block-end:var(--space-6)}.CoursePlanSection-module__SVqg_a__dayRule{align-items:baseline;gap:var(--space-3);margin-block:var(--space-5) var(--space-2);font-family:var(--font-mono);font-size:var(--text-micro);letter-spacing:.14em;text-transform:uppercase;font-weight:var(--font-weight-semibold);color:var(--color-ink-3);display:flex}.CoursePlanSection-module__SVqg_a__dayRule[data-today]{color:var(--color-active)}.CoursePlanSection-module__SVqg_a__dayRuleLine{border-block-end:1px solid var(--color-border);flex:1;transform:translateY(-3px)}.CoursePlanSection-module__SVqg_a__dayRuleLoad{font-weight:var(--font-weight-medium);color:var(--color-ink-3);letter-spacing:.08em;text-transform:none}.CoursePlanSection-module__SVqg_a__sessions{gap:var(--space-3);flex-direction:column;margin:0;padding:0;list-style:none;display:flex}.CoursePlanSection-module__SVqg_a__sessionLink{color:inherit;border-radius:var(--radius-md);text-decoration:none;display:block}.CoursePlanSection-module__SVqg_a__sessionLink:hover .CoursePlanSection-module__SVqg_a__sessionCard{border-color:var(--color-border-strong);box-shadow:var(--shadow-md)}.CoursePlanSection-module__SVqg_a__sessionLink:focus-visible{outline:none}.CoursePlanSection-module__SVqg_a__sessionLink:focus-visible .CoursePlanSection-module__SVqg_a__sessionCard{box-shadow:0 0 0 3px var(--color-focus-ring)}.CoursePlanSection-module__SVqg_a__sessionCard{gap:var(--space-1);flex-direction:column;display:flex}.CoursePlanSection-module__SVqg_a__sessionHead{align-items:baseline;gap:var(--space-3);display:flex}.CoursePlanSection-module__SVqg_a__sessionTitle{text-overflow:ellipsis;white-space:nowrap;min-inline-size:0;font-family:var(--font-serif);font-size:var(--text-lg);font-weight:var(--font-weight-medium);letter-spacing:-.012em;color:var(--color-ink);flex:1;overflow:hidden}.CoursePlanSection-module__SVqg_a__sessionKind{font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:.14em;text-transform:uppercase;font-weight:var(--font-weight-semibold);color:var(--color-ink-3);white-space:nowrap;flex-shrink:0}.CoursePlanSection-module__SVqg_a__sessionMeta{font-size:var(--text-meta);color:var(--color-ink-2)}
.OnboardingClient-module__zKFcsW__fallback{background-color:var(--color-bg);width:100%;min-height:100dvh;color:var(--color-ink);padding:var(--space-8);place-items:center;display:grid}.OnboardingClient-module__zKFcsW__fallbackText{font-family:var(--font-serif);font-size:var(--text-body);color:var(--color-ink-2);margin:0}
.SettingsPage-module__05b-aq__wrapper{gap:var(--space-10);flex-direction:column;display:flex}.SettingsPage-module__05b-aq__header{gap:var(--space-3);flex-direction:column;display:flex}.SettingsPage-module__05b-aq__title{margin:0}.SettingsPage-module__05b-aq__billing{scroll-margin-top:var(--space-12)}.SettingsPage-module__05b-aq__subtitle{font-family:var(--font-serif);font-size:var(--text-body);line-height:var(--leading-relaxed);color:var(--color-ink-2);max-width:60ch;margin:0}
.AchievementsGrid-module__OoDoUq__root{gap:var(--space-10);flex-direction:column;display:flex}.AchievementsGrid-module__OoDoUq__section{gap:var(--space-5);flex-direction:column;display:flex}.AchievementsGrid-module__OoDoUq__grid{gap:var(--space-4-5);grid-template-columns:repeat(auto-fill,minmax(260px,1fr));margin:0;padding:0;list-style:none;display:grid}.AchievementsGrid-module__OoDoUq__cell{display:contents}@media (max-width:767.98px){.AchievementsGrid-module__OoDoUq__grid{grid-template-columns:1fr}}
.MessageTimestamp-module__tlceyq__timestamp{font-size:var(--text-xs);color:var(--color-ink-3);font-variant-numeric:tabular-nums;font-feature-settings:"tnum";letter-spacing:.01em;white-space:nowrap;cursor:help;-webkit-user-select:none;user-select:none;opacity:.85;line-height:1;transition:opacity .12s}.MessageTimestamp-module__tlceyq__timestamp:hover{opacity:1}@media (max-width:480px){.MessageTimestamp-module__tlceyq__timestamp{font-size:.6875rem}}
.FormulaPalette-module__cCBV0W__formulaSheetRoot{z-index:60;pointer-events:none;flex-direction:column;justify-content:flex-end;display:flex;position:fixed;inset:0}.FormulaPalette-module__cCBV0W__formulaSheetBackdrop{pointer-events:auto;background:#00000073;animation:.2s ease-out FormulaPalette-module__cCBV0W__sheetBackdropFadeIn;position:absolute;inset:0}.FormulaPalette-module__cCBV0W__formulaSheet{background:var(--color-bg);border-top-left-radius:var(--radius-lg);border-top-right-radius:var(--radius-lg);gap:var(--space-3);padding:var(--space-3) var(--space-4) var(--space-4);pointer-events:auto;width:100%;max-width:720px;max-height:80dvh;transition:transform var(--transition-base);animation:FormulaPalette-module__cCBV0W__sheetSlideUp .28s var(--ease-standard);flex-direction:column;align-self:center;display:flex;position:relative;transform:translateY(0);box-shadow:0 -12px 40px #0000004d}@keyframes FormulaPalette-module__cCBV0W__sheetBackdropFadeIn{0%{opacity:0}to{opacity:1}}@keyframes FormulaPalette-module__cCBV0W__sheetSlideUp{0%{transform:translateY(100%)}to{transform:translateY(0)}}.FormulaPalette-module__cCBV0W__formulaSheetDragHandle{cursor:grab;touch-action:none;justify-content:center;align-items:center;height:18px;margin:-4px 0 0;display:none}.FormulaPalette-module__cCBV0W__formulaSheetDragHandle span{background:var(--color-border);border-radius:2px;width:40px;height:4px;display:block}.FormulaPalette-module__cCBV0W__formulaSheetHeader{justify-content:space-between;align-items:center;gap:var(--space-3);display:flex}.FormulaPalette-module__cCBV0W__formulaSheetTitle{align-items:center;gap:var(--space-2);display:flex}.FormulaPalette-module__cCBV0W__formulaSheetIcon{color:var(--color-accent);font-family:serif;font-size:1.5rem;line-height:1}.FormulaPalette-module__cCBV0W__formulaSheetTitle h3{font-size:var(--text-base);font-weight:var(--font-weight-bold);color:var(--color-ink);letter-spacing:.2px;margin:0}.FormulaPalette-module__cCBV0W__formulaSheetClose{font-size:1.4rem;line-height:1}.FormulaPalette-module__cCBV0W__paletteTabs{gap:var(--space-1);scrollbar-width:none;border-bottom:1px solid var(--color-border);padding-bottom:2px;display:flex;overflow-x:auto}.FormulaPalette-module__cCBV0W__paletteTabs::-webkit-scrollbar{display:none}.FormulaPalette-module__cCBV0W__paletteTab{min-height:36px;color:var(--color-ink-2);font-size:var(--text-sm);font-weight:var(--font-weight-semibold);cursor:pointer;touch-action:manipulation;background:0 0;border:none;border-bottom:2px solid #0000;flex:none;padding:8px 14px;transition:color .15s,border-color .15s}.FormulaPalette-module__cCBV0W__paletteTab:hover{color:var(--color-ink)}.FormulaPalette-module__cCBV0W__paletteTabActive{color:var(--color-accent);border-bottom-color:var(--color-accent)}.FormulaPalette-module__cCBV0W__paletteGrid{grid-template-columns:repeat(auto-fill,minmax(48px,1fr));gap:6px;max-height:180px;padding:2px;display:grid;overflow-y:auto}.FormulaPalette-module__cCBV0W__paletteButton{border-radius:var(--radius-md);border:1px solid var(--color-border);background:var(--color-surface);min-width:44px;min-height:44px;color:var(--color-ink);cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent;justify-content:center;align-items:center;padding:4px 6px;transition:background-color .15s,border-color .15s,transform .1s;display:flex}.FormulaPalette-module__cCBV0W__paletteButton:hover{background:var(--color-bg);border-color:var(--color-accent)}.FormulaPalette-module__cCBV0W__paletteButton:active{background:var(--color-accent-subtle);transform:scale(.95)}.FormulaPalette-module__cCBV0W__paletteButtonInner{font-size:var(--text-sm);pointer-events:none;line-height:1}.FormulaPalette-module__cCBV0W__paletteButtonInner .katex{font-size:1em}.FormulaPalette-module__cCBV0W__mathFieldHost{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);align-items:center;min-height:72px;padding:10px 14px;transition:border-color .15s,box-shadow .15s;display:flex}.FormulaPalette-module__cCBV0W__mathFieldHost:focus-within{border-color:var(--color-accent);box-shadow:0 0 0 3px var(--color-focus-ring)}.FormulaPalette-module__cCBV0W__mathFieldHost math-field{width:100%;color:var(--color-ink);--keycap-height:44px;background:0 0;border:none;outline:none;flex:1;font-size:1.25rem}.FormulaPalette-module__cCBV0W__formulaSheetActions{justify-content:flex-end;align-items:center;gap:var(--space-3);padding-top:var(--space-2);display:flex}.FormulaPalette-module__cCBV0W__formulaSheetCancel,.FormulaPalette-module__cCBV0W__formulaSheetInsert{min-height:44px}.FormulaPalette-module__cCBV0W__formulaSheetInsert:hover:not(:disabled){transform:translateY(-1px)}@media (prefers-reduced-motion:reduce){.FormulaPalette-module__cCBV0W__formulaSheetInsert:hover:not(:disabled){transform:none}}@media (max-width:640px){.FormulaPalette-module__cCBV0W__formulaSheet{max-width:100%;height:75dvh;max-height:75dvh;padding-bottom:max(var(--space-4), env(safe-area-inset-bottom))}.FormulaPalette-module__cCBV0W__formulaSheetDragHandle{display:flex}.FormulaPalette-module__cCBV0W__paletteGrid{flex:1;max-height:none}}@media (prefers-reduced-motion:reduce){.FormulaPalette-module__cCBV0W__formulaSheet,.FormulaPalette-module__cCBV0W__formulaSheetBackdrop{transition:none;animation:none}}
.WeakSpots-module__xWqzrG__list{gap:var(--space-3);flex-direction:column;margin:0;padding:0;list-style:none;display:flex}.WeakSpots-module__xWqzrG__rowLink{gap:var(--space-2);padding-block:var(--space-3);padding-inline:var(--space-5);color:inherit;flex-direction:column;text-decoration:none;display:flex}.WeakSpots-module__xWqzrG__rowLink:focus-visible{outline:2px solid var(--color-focus-ring);outline-offset:2px}.WeakSpots-module__xWqzrG__head{align-items:baseline;gap:var(--space-3);display:flex}.WeakSpots-module__xWqzrG__topic{min-inline-size:0;font-family:var(--font-serif);font-size:var(--text-lg);font-weight:var(--font-weight-medium);letter-spacing:-.012em;color:var(--color-ink);text-overflow:ellipsis;white-space:nowrap;flex:1;line-height:1.25;overflow:hidden}.WeakSpots-module__xWqzrG__kind{font-family:var(--font-mono);font-size:var(--text-micro);letter-spacing:.12em;text-transform:uppercase;font-weight:var(--font-weight-semibold);color:var(--color-ink-3);white-space:nowrap;flex-shrink:0}.WeakSpots-module__xWqzrG__meta{align-items:baseline;gap:var(--space-3);font-size:var(--text-meta);color:var(--color-ink-3);flex-wrap:wrap;margin:0;display:flex}.WeakSpots-module__xWqzrG__dot{color:var(--color-ink-3)}
.PlanComparison-module__mRpRpq__root{gap:var(--space-6);flex-direction:column;display:flex}.PlanComparison-module__mRpRpq__cycleRow{justify-content:center;display:flex}.PlanComparison-module__mRpRpq__cycleTabs{width:auto}.PlanComparison-module__mRpRpq__cycleList{gap:var(--space-1);padding:var(--space-1);border-radius:var(--radius-full);background:var(--color-surface-2);border-bottom:none;border:1px solid var(--color-border)}.PlanComparison-module__mRpRpq__cycleTab{align-items:center;gap:var(--space-2);border-radius:var(--radius-full);padding:var(--space-2) var(--space-4);transition:color var(--duration-fast) var(--ease-emphasized), background var(--duration-fast) var(--ease-emphasized);display:inline-flex}.PlanComparison-module__mRpRpq__cycleTab:after{display:none}.PlanComparison-module__mRpRpq__cycleTab[aria-selected=true]{background:var(--color-surface);color:var(--color-ink);box-shadow:var(--shadow-sm)}.PlanComparison-module__mRpRpq__cycleSave{font-family:var(--font-mono);text-transform:uppercase;letter-spacing:.05em;padding:0 var(--space-2);border-radius:var(--radius-full);background:var(--color-accent);color:var(--color-on-accent);font-size:.66rem;line-height:1.7}.PlanComparison-module__mRpRpq__table{table-layout:fixed;border-collapse:separate;border-spacing:0;width:100%}.PlanComparison-module__mRpRpq__colLabel{width:23%}.PlanComparison-module__mRpRpq__srOnly{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.PlanComparison-module__mRpRpq__corner{border-bottom:1px solid var(--color-border)}.PlanComparison-module__mRpRpq__headCell{vertical-align:bottom;padding:0 var(--space-2) var(--space-4);border-bottom:1px solid var(--color-border);text-align:center}.PlanComparison-module__mRpRpq__tierHead{align-items:center;gap:var(--space-1);padding:var(--space-5) var(--space-2) var(--space-1);flex-direction:column;display:flex;position:relative}.PlanComparison-module__mRpRpq__popular{top:calc(-1 * var(--space-2));padding:2px 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