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label{cursor:pointer;min-height:48px}.policy-consent-hint{margin-top:calc(-1 * var(--space-sm));margin-bottom:var(--space-xl)}.footer{justify-content:space-between;align-items:center;gap:var(--space-md) var(--space-xl);flex-wrap:wrap;display:flex}.footer nav a{padding-inline:0;font-weight:400;text-decoration:underline}.footer nav{gap:var(--space-xl)}@font-face{font-family:Fredoka;font-style:normal;font-weight:300 700;font-display:swap;src:url(/assets/fredoka-latin-DOQG_Jwn.woff2)format("woff2")}@font-face{font-family:Nunito Sans;font-style:normal;font-weight:400 900;font-display:swap;src:url(/assets/nunito-sans-latin-DMs03jvk.woff2)format("woff2")}:root{--lightningcss-light:initial;--lightningcss-dark: 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3rem);--question-weight:700;--question-line:1.4;--radius-control:12px;--radius-panel:16px;--radius-badge:999px;--space-xs:4px;--space-sm:8px;--space-md:12px;--space-lg:16px;--space-xl:24px;--space-xxl:32px;--space-section:48px;--motion-duration:.18s;--focus-width:3px;--focus-offset:3px}*{box-sizing:border-box}body{font:var(--body-weight) var(--body-size)/var(--body-line) var(--font);background:var(--canvas);color:var(--text);margin:0}::selection{background:var(--sun);color:var(--text)}a{color:var(--primary);text-underline-offset:.2em}a:hover{color:var(--primary-hover)}:focus-visible{outline:var(--focus-width) solid var(--primary-active);outline-offset:var(--focus-offset)}.header,main,.footer{max-width:76rem;padding-inline:var(--space-lg);margin-inline:auto}.header{justify-content:space-between;align-items:center;gap:var(--space-lg);padding-block:var(--space-xl);border-bottom:1px solid 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0 var(--space-xl);overflow-wrap:anywhere;max-width:68ch}.intro{color:var(--text-muted);margin-bottom:var(--space-xxl);font-size:1.125rem}.welcome{max-width:none}.welcome-access{align-items:center;gap:var(--space-lg);margin-top:var(--space-xxl);flex-wrap:wrap;display:flex}.welcome-access .button{flex-shrink:0}.welcome-access p{flex:14rem;margin:0}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-panel);padding:var(--space-xxl)}.button{gap:var(--space-sm);max-width:100%;min-height:48px;padding:var(--space-md) 20px;border-radius:var(--radius-control);font:var(--label-weight) var(--label-size)/var(--label-line) var(--font);cursor:pointer;overflow-wrap:anywhere;border:1px solid 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li{padding:var(--space-xl);margin-block:var(--space-lg);background:var(--surface);border-radius:var(--radius-panel)}.journey li::marker{color:var(--primary);font:500 1.5rem/1 var(--display-font)}.availability{color:var(--text-muted)}.footer{padding-block:var(--space-xl);border-top:1px solid var(--border)}.skip-link{top:-100px;left:var(--space-lg);background:var(--surface);padding:var(--space-md);z-index:1;position:absolute}.skip-link:focus{top:var(--space-sm)}@media (width>=40rem){.header,main,.footer{padding-inline:var(--space-xl)}}@media (width>=64rem){.header,main,.footer{padding-inline:var(--space-xxl)}}@media (width<=25rem){.card{padding:var(--space-lg)}}@media (width<=40rem){.header--public{padding-block:var(--space-lg);gap:var(--space-sm)}.header--public nav{gap:var(--space-xs);grid-template-columns:repeat(3,minmax(0,1fr));width:100%;display:grid}.header--public nav a{padding-inline:var(--space-sm);text-align:center;overflow-wrap:anywhere;justify-content:center}.welcome-main{padding-block:var(--space-xxl)}.welcome .actions,.welcome-access{align-items:stretch;gap:var(--space-md);flex-direction:column}.welcome-access p{flex:none}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}fieldset{border:0;min-width:0;margin:0;padding:0}.account-form{max-width:34rem}.status[role=alert]{margin-bottom:var(--space-xl)}.actions{gap:var(--space-md);flex-wrap:wrap;display:flex}.section-gap{margin-top:var(--space-xxl)}.form-gap{height:var(--space-xl)}.field select{width:100%;min-height:48px;padding:var(--space-md) var(--space-lg);border:1px solid var(--control-border);border-radius:var(--radius-control);background:var(--surface);color:var(--text);font:inherit}.checkbox{align-items:center;gap:var(--space-md);min-height:48px;margin-bottom:var(--space-lg);display:flex}.checkbox input{width:24px;height:24px;accent-color:var(--primary)}.children-list,.profile-list{margin:0;padding:0;list-style:none}.child-row{padding:var(--space-xl);border:1px solid var(--border);border-radius:var(--radius-panel);background:var(--surface);min-width:0}.profile-list{margin-bottom:var(--space-xl)}.profile-list li{justify-content:space-between;gap:var(--space-md);padding-block:var(--space-md);border-bottom:1px solid var(--border);flex-wrap:wrap;display:flex}h1,h2,label,.button,strong{overflow-wrap:anywhere}select{font:inherit;color:var(--text);background:var(--surface);border:1px solid var(--control-border);border-radius:var(--radius-control);width:100%;max-width:100%;min-height:48px;padding:12px 16px}label:has(select){margin-bottom:1rem;font-weight:600;display:block}label select{margin-top:.5rem;display:block}.filters{gap:var(--space-lg);padding:var(--space-xl);background:var(--surface);border-radius:var(--radius-panel);margin-bottom:var(--space-xl);flex-wrap:wrap;display:flex}.filters label{flex:1;min-width:min(10rem,100%)}.filters>div,.filters .field{flex:12rem;min-width:0}.parent-workspace{max-width:66rem}.child-workspace{max-width:46rem;margin-inline:auto}.practice-form{max-width:42rem}.dashboard-controls{align-items:center;gap:var(--space-lg);padding:var(--space-xl);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-panel);flex-wrap:wrap;display:flex}.dashboard-controls label{flex:18rem;margin:0}.practice-action{gap:var(--space-md);flex-wrap:wrap;align-items:center;display:flex}.topic-summary-list,.lesson-list{gap:var(--space-lg);grid-template-columns:repeat(2,minmax(0,1fr));padding:0;list-style:none;display:grid}.topic-summary-list li,.lesson-list li{padding:var(--space-xl);background:var(--surface);border:1px 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var(--space-md);white-space:nowrap;font-size:var(--meta-size);font-weight:800;display:inline-block}.solver{max-width:46rem;margin-inline:auto}.solver .button,.solver input{min-height:48px}.solver progress{width:100%;height:.6rem;margin-bottom:var(--space-lg);accent-color:var(--primary)}.math-prompt{font-size:var(--question-size);line-height:var(--question-line);font-weight:var(--question-weight);text-align:center;overflow-wrap:anywhere;margin-block:var(--space-xl)}.help-actions{gap:var(--space-md);margin-top:var(--space-xl);padding-top:var(--space-xl);border-top:1px solid var(--border);flex-wrap:wrap;display:flex}.help-actions p{flex-basis:100%;margin-top:0}.worked-example{background:var(--sun-soft);padding:var(--space-xl);border-radius:var(--radius-control);overflow-wrap:anywhere}.lesson{max-width:46rem;padding:var(--space-xxl);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-panel);margin-inline:auto}.score-summary dl{gap:var(--space-xxl);padding-top:var(--space-lg);border-top:1px solid var(--border);flex-wrap:wrap;margin-bottom:0;display:flex}.score-summary dt{font-weight:600}.score-summary dd{margin:0}.result-list>li{padding:var(--space-xxl);margin-block:var(--space-xl);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-panel)}.attempt-list{padding-left:1.5rem}.attempt-list li{overflow-wrap:anywhere;margin-bottom:1rem}.raw-answer{white-space:pre-wrap;overflow-wrap:anywhere}summary{cursor:pointer;min-height:44px;padding:.5rem 0}@media (width<=40rem){.math-prompt{font-size:2rem}.practice-list li{flex-wrap:wrap}.help-actions .button{flex:1}}.selected-topic{overflow-wrap:anywhere;margin-top:.5rem}.math-prompt--prose{text-align:left;max-width:65ch;font-size:1.125rem}.math-tokens{flex-wrap:wrap;align-items:center;gap:1rem;display:inline-flex}.fraction{text-align:center;line-height:1.3;display:inline-grid}.fraction>span:first-child{border-bottom:2px solid;padding:0 .3em .1em}.fraction>span:last-child{padding-top:.1em}.rectangle-diagram{text-align:center;max-width:20rem;margin:1rem auto}.rectangle-diagram svg{width:100%;height:auto}.rectangle-diagram figcaption{font-size:.875rem}.answer-choices{border:0;min-width:0;margin:0 0 1.5rem;padding:0}.answer-choices legend{font-weight:600}.choice-row{border:1px solid var(--control-border);border-radius:var(--radius-control);cursor:pointer;align-items:center;gap:.75rem;min-height:48px;margin:.5rem 0;padding:.75rem;display:flex}.choice-row:has(input:checked){background:var(--primary-soft);border-color:var(--primary)}.choice-row input{width:1.25rem;height:1.25rem;accent-color:var(--primary);flex-shrink:0}.answer-with-unit{align-items:center;gap:.75rem;display:flex}.answer-with-unit .field{flex:1;min-width:0}.answer-unit{white-space:nowrap;font-weight:600}.math-diagram{margin:var(--space-xl) 0;max-width:100%}.math-diagram svg{width:100%;max-width:24rem;height:auto;margin-inline:auto;font-size:16px;display:block}.math-diagram[data-kind=coordinate] svg{max-width:28rem;font-size:16px}.math-diagram figcaption,.diagram-description{font-size:1rem;line-height:1.6}.diagram-description summary{cursor:pointer;text-underline-offset:.2em;padding-block:.5rem;text-decoration:underline}.app-shell{border-top:6px solid var(--primary);min-height:100vh}.brand-mark{flex-shrink:0;width:40px;height:40px}nav a:hover:not([aria-current]){background:var(--primary-soft)}nav form{margin:0}nav .button{min-height:44px;padding:var(--space-sm) var(--space-md)}.welcome-opening{align-items:center;gap:var(--space-section);grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);display:grid}.welcome h1{max-width:16ch;font-size:clamp(2.5rem,5vw,4rem);line-height:1.06}.welcome-routine{margin-block:var(--space-xxl)}.welcome-routine h2{font-family:var(--font);font-size:1.125rem;font-weight:800}.welcome-routine>p{color:var(--text-muted)}.example-practice{background:var(--mint);padding:var(--space-xxl);border-radius:var(--radius-panel)}.example-practice .meta{color:#315d4d}.example-question{font:500 clamp(3rem, 6vw, 4.5rem)/1.2 var(--display-font);text-align:center;color:var(--text);margin-block:var(--space-xl)}.example-operation{color:var(--primary-active)}.example-groups{gap:var(--space-sm);margin-bottom:var(--space-lg);display:grid}.example-group{gap:var(--space-xs);text-align:center;grid-template-columns:5fr 1fr;font-weight:800;display:grid}.example-group span{padding:var(--space-sm);background:var(--surface);border-radius:8px}.example-group span:last-child{background:var(--sun)}.example-caption{text-align:center;font-size:1rem;font-weight:800}.example-practice details{border-top:1px solid #87bba3}.example-practice summary{color:var(--text);font-weight:800}.example-practice details p{margin-block:var(--space-md)}.page-content>.account-form{margin-inline:auto}.account-form--child>h1{color:var(--primary-active)}.account-form .card fieldset>div>.button[type=submit]{width:100%}.children-list{gap:var(--space-xl);margin-bottom:var(--space-xl);grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.profile-heading{align-items:center;gap:var(--space-md);margin-bottom:var(--space-lg);display:flex}.profile-heading h2{margin:0}.profile-initial{width:48px;height:48px;color:var(--text);background:var(--mint);border-radius:var(--radius-control);font:500 1.5rem/1 var(--display-font);flex-shrink:0;place-items:center;display:grid}.child-row:nth-child(2n) .profile-initial{background:var(--sun)}.practice-group{padding:var(--space-xl);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-panel)}.practice-list{margin-block:0}.practice-list li:last-child{border-bottom:0;padding-bottom:0}.practice-list li:first-child{padding-top:var(--space-md)}.practice-copy>a,.practice-copy>strong{font-size:1.125rem;font-weight:800}.child-workspace .practice-action{flex-direction:column;align-items:flex-end}.child-workspace .practice-action .button{background:var(--primary);border-color:var(--primary);color:var(--on-primary)}.child-workspace .practice-action .button:hover{background:var(--primary-hover)}.badge--assigned{background:var(--sun-soft);color:var(--warning)}.score-first{color:var(--primary-active);font-size:1.25rem}.result-list .math-prompt{text-align:left}.completion{background:var(--mint);padding:var(--space-xxl);border-radius:var(--radius-panel)}.completion h1{margin-top:var(--space-lg)}.completion .score-summary{background:0 0;border:0;border-radius:0;padding:0}.solver>a:first-child{margin-bottom:var(--space-xl);display:inline-block}.question-trail{margin:0 0 var(--space-xl);gap:var(--space-sm);flex-wrap:wrap;padding:0;list-style:none;display:flex}.question-step{justify-content:center;align-items:center;gap:var(--space-xs);min-width:36px;min-height:36px;padding:var(--space-xs) var(--space-sm);border:1px solid var(--control-border);border-radius:var(--radius-control);background:var(--surface);color:var(--text-muted);font-variant-numeric:tabular-nums;font-weight:800;display:flex}.question-step svg{width:14px;height:14px}.question-step--finished{color:var(--success);background:var(--success-soft);border-color:#8abaac}.question-step[aria-current]{background:var(--primary);color:var(--on-primary);border-color:var(--primary);outline:2px solid var(--primary);outline-offset:2px;animation:marker-settle var(--motion-duration) cubic-bezier(.16, 1, .3, 1)}@keyframes marker-settle{0%{outline-offset:5px}to{outline-offset:2px}}.solver .card form>.button,.solver .card>.button{min-width:min(10rem,100%)}.solver .answer-with-unit input{font-size:1.5rem;font-weight:700}.learn-workspace{max-width:66rem}.lesson-exercise{padding-block:var(--space-xl);border-top:1px solid var(--border)}.lesson-exercise>h2{color:var(--primary-active)}.lesson-list a{margin-bottom:var(--space-sm);font-weight:800;display:inline-block}.lesson-invitation{margin-bottom:0}@media (width<=48rem){.welcome-opening{gap:var(--space-xxl);grid-template-columns:minmax(0,1fr)}.welcome h1{max-width:20ch}.example-practice{max-width:36rem}.children-list,.topic-summary-list,.lesson-list{grid-template-columns:minmax(0,1fr)}}@media (width<=40rem){.header{padding-block:var(--space-lg);gap:var(--space-md)}.app-shell--parent nav{grid-template-columns:repeat(2,minmax(0,1fr));width:100%;display:grid}.app-shell--parent nav form{grid-column:1/-1}.app-shell--parent nav form .button,.app-shell--child nav{width:100%}.app-shell--child nav a{flex:1}main{padding-block:var(--space-xxl)}.card,.lesson,.result-list>li{padding:var(--space-xl)}.welcome h1{font-size:2.5rem}.example-practice{padding:var(--space-xl)}.practice-group{padding:var(--space-lg)}.practice-action,.child-workspace .practice-action{flex-direction:row;justify-content:flex-start;align-items:center;width:100%}.child-workspace .practice-action .button{flex:1}.filters,.dashboard-controls{padding:var(--space-lg)}.completion{padding:var(--space-xl)}}@media (width<=25rem){.lesson,.result-list>li{padding:var(--space-lg)}}.practice-choices{margin:var(--space-xl) 0;border:0;min-width:0;padding:0}.practice-choices legend{font-weight:700;font-size:var(--label-size);margin-bottom:var(--space-sm)}.practice-category-options{gap:var(--space-sm);grid-template-columns:repeat(auto-fit,minmax(min(100%,14rem),1fr));display:grid}.practice-choice{align-items:flex-start;gap:var(--space-md);padding:var(--space-md);cursor:pointer;border-radius:var(--radius-control);min-height:44px;margin:0;display:flex}.practice-choice:hover{background:var(--primary-soft)}.practice-choice:has(input:checked){background:var(--primary-soft)}.practice-choice input[type=checkbox]{width:1.25rem;height:1.25rem;min-height:0;accent-color:var(--primary);flex-shrink:0;margin-top:.2rem}.practice-choice>span{overflow-wrap:anywhere;min-width:0}.practice-choice-category{display:block}.practice-topic-options{overscroll-behavior:contain;border:1px solid var(--border);border-radius:var(--radius-control);scrollbar-color:var(--text-muted) var(--surface);max-height:24rem;overflow-y:auto}.practice-topic-options 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.math-prompt{font-size:1.5rem}.results-workspace .score-summary{background:var(--mint-soft);border:0}@media (prefers-reduced-motion:no-preference){.button,nav a,.field input,select{transition:border-color .12s ease-out}.button:active:not(:disabled){transform:translateY(1px)}}@media (width<=60rem){.header{gap:var(--space-md)}.create-workspace .practice-form{grid-template-columns:minmax(0,1fr)}.practice-preview{padding:var(--space-xl)}}@media (width<=48rem){.dashboard-practices{grid-template-columns:minmax(0,1fr)}.welcome-journey li{border-left:0;border-top:2px solid var(--border);padding:var(--space-lg) 0 0}}@media (width<=40rem){h1{font-size:1.875rem}.brand-area{justify-content:space-between;gap:var(--space-sm);width:100%}.brand{gap:var(--space-sm);font-size:1.25rem}.role-label{padding-left:var(--space-sm);max-width:11ch;font-size:.8125rem}.header{padding-block:var(--space-md)}nav a{padding-inline:var(--space-sm)}.app-shell--parent 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