@font-face{font-family:Atkinson Hyperlegible Next;src:url(/fonts/atkinson-next-latin.woff2)format("woff2");font-weight:200 800;font-display:swap}:root{--canvas:#f6f7f2;--surface:#fff;--ink:#172d32;--muted:#52646a;--primary:#006d68;--primary-hover:#005650;--primary-soft:#e3f2ec;--accent:#f5d879;--accent-ink:#4d3b00;--error:#a52834;--error-soft:#fff0f1;--success:#176443;--success-soft:#eaf5ee;--focus:#5c3eb5;--control-border:#71847f;--divider:#d7e0da;--radius:14px;--font:"Atkinson Hyperlegible Next",system-ui,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:32px}body{background:var(--canvas);color:var(--ink);font:18px/1.6 var(--font);font-synthesis:none;-webkit-font-smoothing:antialiased;margin:0}button,input,select,textarea{font:inherit}a{color:var(--primary);text-underline-offset:4px}a:hover{color:var(--primary-hover)}button,a,input,select,summary{touch-action:manipulation}:focus-visible{outline:3px solid var(--focus);outline-offset:4px}button{cursor:pointer}button:disabled{cursor:default;opacity:.5}button,select,input{color:var(--ink)}input,select{border:1.5px solid var(--control-border);background:#fff;border-radius:10px;max-width:100%;min-height:50px;padding:10px 12px}input:focus,select:focus{border-color:var(--primary)}p{margin:0 0 20px}h1,h2,h3,h4{text-wrap:balance;margin:0 0 20px;font-weight:650;line-height:1.15}h1{letter-spacing:-1.8px;font-size:clamp(36px,4.6vw,58px)}h2{letter-spacing:-.8px;font-size:clamp(28px,3vw,38px)}h3{letter-spacing:-.35px;font-size:23px}h4{font-size:19px}ul,ol{padding-left:24px}li{margin:6px 0}fieldset{border:0;min-width:0;margin:0;padding:0}legend{margin-bottom:12px;font-weight:600}label{font-weight:500;display:block}label input,label select{margin-top:8px;display:block}dl{margin:0}dd{color:var(--muted);margin:0}dt{font-weight:650}svg{display:block}summary{cursor:pointer;min-height:48px;padding:12px 0;font-weight:600}details>p,details>ul,details>dl{margin:8px 0 20px}details{border-top:1px solid var(--divider)}details:last-child{border-bottom:1px solid var(--divider)}blockquote{letter-spacing:-.4px;border-left:3px solid var(--primary);margin:20px 0 30px;padding-left:22px;font-size:27px;line-height:1.4}.small{font-size:15px}.muted{color:var(--muted)}.narrow{max-width:760px}.eyebrow{letter-spacing:1.3px;text-transform:uppercase;color:var(--primary);margin-bottom:14px;font-size:13px;font-weight:700;line-height:1.5;display:block}.text-link{font-weight:600;text-decoration:none;display:inline-block}.text-link:hover{text-decoration:underline}.button{border:1.5px solid var(--control-border);min-height:50px;color:var(--ink);background:var(--surface);border-radius:12px;justify-content:center;align-items:center;gap:10px;padding:12px 22px;font-size:17px;font-weight:600;text-decoration:none;transition:background-color .12s,border-color .12s;display:inline-flex}.button:hover{color:var(--ink);background:var(--primary-soft);border-color:var(--primary)}.button.primary{color:#fff;background:var(--primary);border-color:var(--primary)}.small-button{min-height:48px;padding:9px 16px;font-size:15px}.text-button{color:var(--primary);text-align:left;background:0 0;border:0;min-height:48px;padding:10px 0;font-size:16px;font-weight:600}.text-button:hover{text-decoration:underline}.icon-button{background:0 0;border:0;min-width:48px;min-height:48px;padding:0;font-size:24px}.button-row{flex-wrap:wrap;align-items:center;gap:14px;display:flex}.skip-link{z-index:10;background:#fff;padding:12px;position:absolute;top:-90px;left:12px}.skip-link:focus{top:12px}.site-header{background:var(--surface);border-bottom:1px solid var(--divider)}.header-inner{justify-content:space-between;align-items:center;gap:32px;max-width:1248px;margin:auto;padding:22px 24px;display:flex}.brand{letter-spacing:-.6px;color:var(--ink);white-space:nowrap;align-items:center;gap:10px;font-size:25px;font-weight:700;text-decoration:none;display:inline-flex}.brand svg{color:var(--primary)}.header-inner nav{align-items:center;gap:34px;font-size:16px;display:flex}.header-inner nav a{color:var(--ink);padding:6px 0;text-decoration:none}.header-inner nav a.active{color:var(--primary);text-decoration:underline}.header-inner .search-link{align-items:center;gap:8px;display:flex}.site-main{max-width:1248px;margin:auto;padding:36px 24px 80px}.home-hero{grid-template-columns:1fr 1fr;align-items:center;gap:68px;padding:50px 0 60px;display:grid}.home-hero h1{letter-spacing:-2.5px;margin:20px 0 30px;font-size:clamp(42px,5vw,66px);line-height:1.02}.heading-accent{color:var(--primary)}.hero-lead{color:var(--muted);max-width:680px;margin-bottom:28px;font-size:21px;line-height:1.55}.hero-note{color:var(--muted);margin:20px 0 0;font-size:15px}.fraction-lab{border:1px solid var(--divider);background:#fff;border-radius:22px;padding:32px;box-shadow:0 16px 36px #172d3206}.lab-top{justify-content:space-between;gap:12px;display:flex}.lab-top .eyebrow{font-size:12px}.fraction-lab h2{margin:22px 0 28px;font-size:31px;line-height:1.7}.inline-fraction{vertical-align:middle;text-align:center;font-variant-numeric:tabular-nums;flex-direction:column;min-width:26px;margin:0 5px;font-size:.85em;line-height:1.1;display:inline-flex}.inline-fraction>span:first-child{border-bottom:2px solid;padding-bottom:4px}.inline-fraction>span:last-child{padding-top:4px}.lab-controls{flex-direction:column;gap:24px;margin:30px 0 20px;display:flex}.lab-controls legend,.stepper>span{font-size:15px}.segmented{flex-wrap:wrap;gap:8px;display:flex}.segmented button{border:1px solid var(--control-border);background:#fff;border-radius:9px;min-width:48px;min-height:48px}.segmented button[aria-pressed=true]{background:var(--primary-soft);border:2px solid var(--primary);font-weight:700}.stepper{justify-content:space-between;align-items:center;gap:20px;display:flex}.stepper>div{align-items:center;gap:16px;display:flex}.stepper button{border:1px solid var(--control-border);background:#fff;border-radius:9px;min-width:48px;min-height:48px;font-size:24px}.stepper output{text-align:center;min-width:20px;font-weight:600}.lab-foot{color:var(--muted);border-top:1px solid var(--divider);margin:0 0 14px;padding-top:20px;font-size:16px}.fraction-lab .text-link{font-size:16px}.promise-strip{border-top:1px solid var(--divider);border-bottom:1px solid var(--divider);grid-template-columns:1fr 1fr 1fr;gap:34px;padding:26px 0;display:grid}.promise-strip>div{gap:15px;display:flex}.strip-number{color:var(--primary);padding-top:3px;font-size:13px;font-weight:700}.promise-strip p{color:var(--muted);margin:0;font-size:15px}.promise-strip strong{color:var(--ink);margin-bottom:4px;font-size:17px;font-weight:600;display:block}.section-heading{justify-content:space-between;align-items:end;gap:44px;margin-bottom:30px;display:flex}.section-heading>p{max-width:390px;color:var(--muted);margin:0 0 4px;font-size:17px}.section-heading h2{margin-bottom:0}.starting-paths{border:1px solid var(--divider);background:#edf1e9;border-radius:18px;grid-template-columns:repeat(3,1fr);gap:0;display:grid;overflow:hidden}.starting-path{color:var(--ink);border-right:1px solid #c8d4c8;flex-direction:column;align-items:start;padding:30px;text-decoration:none;display:flex}.starting-path:last-child{border:0}.starting-path:hover{color:var(--ink);background:#e5ece0}.path-index{color:var(--primary);margin-bottom:28px;font-size:14px;font-weight:600}.starting-path h3{min-height:62px;line-height:1.35}.starting-path p{color:var(--muted);flex:1;font-size:16px}.starting-path .text-link{font-size:16px}.skill-list{border-top:1px solid var(--divider);margin:0;padding:0;list-style:none}.skill-list>li{border-bottom:1px solid var(--divider);margin:0}.skill-list a{color:var(--ink);align-items:center;gap:25px;padding:25px 10px;text-decoration:none;transition:background-color .12s;display:flex}.skill-list h3{margin:0 0 8px;font-size:23px}.skill-list p{color:var(--muted);max-width:760px;margin:0;font-size:16px}.skill-meta{white-space:nowrap;color:var(--muted);align-items:center;gap:36px;margin-left:auto;font-size:14px;display:flex}.skill-meta>span{color:var(--primary);font-size:23px}.skill-number{color:var(--muted);align-self:start;padding-top:4px;font-size:14px}.adult-feature{background:var(--accent);color:var(--accent-ink);border-radius:20px;grid-template-columns:1fr 1.2fr;align-items:center;gap:60px;padding:40px 50px;display:grid}.adult-feature p{font-size:18px}.adult-feature-art{font-variant-numeric:tabular-nums;justify-content:center;align-items:center;gap:20px;display:flex;position:relative}.large-fraction{font-size:100px;line-height:1.3}.equals{font-size:54px}.fold-line{background:var(--accent-ink);width:70%;height:2px;position:absolute;bottom:-26px;left:15%;transform:rotate(-4deg)}.site-footer{border-top:1px solid var(--divider);background:#fff;padding:40px 24px 22px}.footer-inner,.footer-bottom{justify-content:space-between;gap:40px;max-width:1200px;margin:auto;display:flex}.footer-brand{margin-bottom:12px;font-size:22px}.footer-inner p{color:var(--muted);font-size:15px}.footer-inner nav{grid-template-columns:repeat(3,auto);align-content:start;gap:12px 24px;font-size:14px;display:grid}.footer-inner a{text-decoration:none}.footer-bottom{border-top:1px solid var(--divider);color:var(--muted);margin-top:28px;padding-top:22px;font-size:13px}.breadcrumb{color:var(--muted);margin:0 0 32px;font-size:14px}.breadcrumb a{text-decoration:none}.page-heading{padding:32px 0 30px}.page-heading h1{max-width:780px}.jump-links{flex-wrap:wrap;gap:12px;margin-top:28px;display:flex}.jump-links a,.tag{border:1px solid var(--divider);color:var(--muted);background:#fff;border-radius:7px;padding:6px 12px;font-size:14px;text-decoration:none}.resource-hero{grid-template-columns:1.2fr .8fr;align-items:center;gap:70px;display:grid}.resource-hero h1{font-size:clamp(34px,4vw,52px);line-height:1.1}.resource-hero .hero-lead{font-size:20px}.tags{flex-wrap:wrap;gap:8px;margin:22px 0;display:flex}.download-details{color:var(--muted);margin:18px 0 24px;font-size:14px}.goal-line{color:var(--muted);max-width:530px;margin:0;font-size:16px}.goal-line strong{color:var(--ink);margin-bottom:3px;font-weight:600;display:block}.worksheet-preview{background:var(--primary-soft);border-radius:20px;padding:24px 24px 14px;text-decoration:none;display:block}.worksheet-preview img{object-fit:contain;object-position:top;border:1px solid var(--divider);background:#fff;width:100%;height:auto;max-height:490px;display:block;box-shadow:0 4px 12px #172d3210}.worksheet-preview span{text-align:center;color:var(--muted);padding:12px 0 0;font-size:12px;display:block}.prerequisites{border-top:1px solid var(--divider);border-bottom:1px solid var(--divider);flex-wrap:wrap;align-items:center;gap:22px;margin-top:45px;padding:18px 0;font-size:15px;display:flex}.prerequisites strong{color:var(--muted);font-weight:500}.prerequisites a{text-decoration:none}.worked-examples{grid-template-columns:1fr 1fr;gap:28px;display:grid}.worked-example{border:1px solid var(--divider);background:#fff;border-radius:16px;flex-direction:column;padding:30px;display:flex}.example-number{color:var(--primary);margin-bottom:20px;font-size:13px;font-weight:600;display:block}.worked-example h3{font-size:25px}.example-prompt{font-size:19px;font-weight:500}.worked-example ol{flex:1;margin:0 0 24px;padding-left:22px;font-size:17px}.worked-example ol li{margin-bottom:14px;padding-left:5px}.example-answer{background:var(--primary-soft);border-radius:10px;margin:0;padding:15px 18px;font-size:18px;font-weight:600}.real-example{border:1px solid var(--divider);background:#f0f3eb;border-radius:16px;grid-template-columns:1fr 1fr;gap:36px;margin-top:28px;padding:28px;display:grid}.real-example h3{font-size:22px}.real-example details{border:0}.real-example summary{min-height:48px;padding:0}.real-example details p{font-size:17px}.preset-grid{grid-template-columns:repeat(3,1fr);gap:24px;display:grid}.preset-card{border:1px solid var(--divider);background:#fff;border-radius:16px;flex-direction:column;align-items:start;padding:28px;display:flex}.preset-card p{color:var(--muted);flex:1;font-size:17px}.preset-links{flex-wrap:wrap;gap:14px;margin-top:17px;font-size:14px;display:flex}.adult-help{background:var(--primary-soft);border-radius:20px;grid-template-columns:1fr 1fr;gap:60px;padding:38px;display:grid}.adult-help h3{margin-top:25px;font-size:20px}.adult-help p,.adult-help li{font-size:17px}.adult-help summary{font-size:16px}.vocabulary-section{grid-template-columns:1fr 1fr;gap:60px;display:grid}.vocabulary>div{border-top:1px solid var(--divider);padding:14px 0}.vocabulary dt{margin-bottom:5px}.vocabulary dd{font-size:17px}.faq-section{max-width:850px}.faq-section p{font-size:17px}.onward{border:1px solid var(--divider);background:#eaf0e5;border-radius:16px;justify-content:space-between;align-items:center;gap:30px;padding:32px;display:flex}.onward p{max-width:650px;margin:0;font-size:17px}.onward h2{font-size:30px}.onward .button{flex:none}.content-footnote{color:var(--muted);border-top:1px solid var(--divider);margin:44px 0 0;padding-top:24px;font-size:13px;line-height:1.7}.math-scene{flex-direction:column;gap:18px;max-width:100%;margin:24px 0;display:flex}.model-unit{min-width:0}.model-caption{margin:0 0 9px;font-size:17px;font-weight:600}.bar-models{flex-direction:column;gap:8px;display:flex}.bar-models svg{width:100%;height:auto;max-height:48px;display:block}.fraction-filled{fill:#81baa6;stroke:var(--ink);stroke-width:1.5px}.fraction-empty{fill:#fff;stroke:var(--ink);stroke-width:1.5px}.model-stroke{stroke:var(--ink);stroke-width:2px}.model-point{fill:var(--primary)}.model-label{fill:var(--ink);font-family:var(--font);font-size:20px;font-weight:500}.number-line{width:100%;height:auto;display:block;overflow:visible}.circle-models,.hundred-models{flex-wrap:wrap;gap:14px;display:flex}.circle-models svg{width:110px;max-width:100%;height:110px}.hundred-grid{border-left:1px solid var(--ink);border-top:1px solid var(--ink);width:170px;height:170px;display:grid}.hundred-grid span{border-right:1px solid var(--ink);border-bottom:1px solid var(--ink)}.hundred-grid .filled{background:#81baa6}.math-scene.compact{gap:10px;margin:12px 0}.compact .circle-models svg{width:80px;height:80px}.compact .bar-models svg{max-height:35px}.practice-shell{max-width:810px;margin:0 auto;padding:30px 24px 65px;position:relative}.practice-top{justify-content:space-between;align-items:center;gap:20px;margin-bottom:24px;display:flex}.back-link{font-size:15px;font-weight:600;text-decoration:none}.practice-title{letter-spacing:-.6px;margin-bottom:24px;font-size:30px;line-height:1.25}.session-controls{justify-content:space-between;align-items:center;gap:20px;margin:20px 0 28px;display:flex}.mode-control{border:1px solid var(--control-border);background:#fff;border-radius:10px;padding:3px;display:flex}.mode-control button{background:0 0;border:0;border-radius:7px;min-height:48px;padding:10px 12px;font-size:15px}.mode-control button[aria-pressed=true]{background:var(--primary-soft);color:var(--primary);font-weight:600}.question-progress{color:var(--muted);justify-content:space-between;gap:16px;font-size:14px;display:flex}.progress-track{gap:5px;margin:10px 0 25px;display:flex}.progress-track>span{background:#d7e0da;border-radius:2px;flex:1;height:5px}.progress-track>span.done{background:#71a58f}.progress-track>span.visited{background:#bcaf80}.question-card{border:1px solid var(--divider);background:#fff;border-radius:20px;padding:36px}.question-card>h2{letter-spacing:-.3px;text-wrap:pretty;margin-bottom:28px;font-size:27px;line-height:1.4}.question-card>h2:focus{outline:0}.question-card .math-scene{margin:24px 0 30px}.answer-choices{flex-wrap:wrap;gap:12px;margin:22px 0;display:flex}.answer-choices button{border:1.5px solid var(--control-border);text-align:center;background:#fff;border-radius:12px;flex:120px;min-width:0;min-height:58px;padding:14px;font-size:18px}.answer-choices button.selected,.point-options button.selected{border:2px solid var(--primary);background:var(--primary-soft);padding:13.5px;font-weight:600}.answer-choices .math-scene{margin:12px 0}.answer-choices.relations button{font-size:18px}.fraction-editor{margin:30px 0}.fraction-inputs{align-items:center;gap:22px;max-width:340px;display:flex}.fraction-inputs>label{flex:none;width:110px}.fraction-inputs label{font-size:14px}.optional{color:var(--muted);margin-left:6px;font-size:12px}.fraction-inputs input{text-align:center;font-variant-numeric:tabular-nums;width:100%;min-height:56px;font-size:27px}.fraction-fields{width:125px}.fraction-fields>label:first-child{border-bottom:2px solid var(--ink);padding-bottom:14px}.fraction-fields>label:last-child{padding-top:9px}.input-help{color:var(--muted);max-width:520px;margin:16px 0 0;font-size:14px;line-height:1.5}.answer-label{margin:24px 0}.answer-label>input{max-width:200px;font-size:25px}.answer-label>select{max-width:260px}.decomposition{flex-wrap:wrap;gap:16px;margin:24px 0;display:flex}.decomposition label{flex:140px;max-width:250px;font-size:15px}.decomposition input{width:100%;font-size:24px}.decomposition .input-help{flex-basis:100%;margin:0}.shade-editor{margin:26px 0}.shade-whole{border:2px solid var(--ink);border-radius:8px;gap:3px;margin-bottom:15px;padding:5px;display:grid}.shade-whole button{border:1px solid var(--control-border);background:#fff;border-radius:3px;min-width:0;min-height:48px;font-size:20px}.shade-whole button.shaded{color:var(--ink);background:#81baa6}.point-options{flex-wrap:wrap;gap:8px;display:flex}.point-options button{border:1px solid var(--control-border);background:#fff;border-radius:9px;min-width:48px;min-height:48px;padding:10px}.point-options button.selected{padding:9px}.point-editor{margin:24px 0}.answer-actions,.help-actions{flex-wrap:wrap;align-items:center;gap:22px;margin-top:25px;display:flex}.answer-feedback{margin-top:18px;font-size:18px;line-height:1.5}.answer-feedback:empty{display:none}.answer-feedback.incorrect{color:var(--error);background:var(--error-soft);border-radius:10px;padding:14px 18px}.answer-feedback.correct{color:var(--success);background:var(--success-soft);border-radius:10px;padding:14px 18px}.answer-feedback.format,.answer-feedback.form{color:var(--accent-ink);background:#fff8df;border-radius:10px;padding:14px 18px}.help-actions{border-top:1px solid var(--divider);padding-top:20px}.hints{background:var(--primary-soft);border-radius:10px;margin:18px 0;padding:18px 18px 18px 38px;font-size:17px}.solution{margin-top:25px}.solution summary,.solution p{font-size:17px}.guided-panel{border-left:3px solid var(--primary);background:#f1f6ef;border-radius:0 12px 12px 0;margin:24px 0;padding:22px}.guided-top{justify-content:space-between;gap:15px;margin-bottom:15px;font-size:14px;display:flex}.guided-panel>p{font-size:18px}.guided-panel .fraction-editor{margin:18px 0}.guided-feedback{color:var(--primary);margin:12px 0 0;font-size:16px}.question-bottom{justify-content:space-between;gap:24px;margin-top:12px;display:flex}.practice-tools{margin-top:40px}.practice-tools summary{font-size:16px}.practice-tools dl{gap:16px;padding:10px 0;font-size:16px;display:grid}.notice{background:#edf2e9;border-radius:10px;justify-content:space-between;align-items:center;gap:14px;margin:18px 0;padding:14px 18px;font-size:15px;display:flex}.checkbox-label{align-items:start;gap:12px;margin:12px 0;font-size:16px;display:flex}.checkbox-label input{width:20px;height:20px;min-height:0;accent-color:var(--primary);margin:4px 0 0}.issue-code{overflow-wrap:anywhere;border:1px solid var(--divider);background:#fff;margin-bottom:12px;padding:12px;font-size:13px;display:block}.restart-confirm{z-index:10;border:2px solid var(--primary);background:#fff;border-radius:16px;width:min(500px,100% - 32px);padding:30px;position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);box-shadow:0 0 0 9999px #172d3266}.restart-confirm h2{font-size:28px}.practice-summary{border:1px solid var(--divider);background:#fff;border-radius:20px;padding:34px}.practice-summary h2{font-size:32px}.result-list{margin:30px 0;padding:0;list-style:none}.result-list li{border-top:1px solid var(--divider);align-items:center;gap:16px;padding:14px 0;display:flex}.result-list li>div{flex-direction:column;display:flex}.result-list strong{font-size:17px}.result-list .text-button{margin-left:auto}.result-number{color:var(--muted);font-size:15px}.next-step{border-top:1px solid var(--divider);margin:28px 0;padding-top:24px}.next-step>*{display:block}.next-step a{margin-top:6px;font-size:23px;font-weight:600;text-decoration:none}.noscript-note{border:2px solid var(--primary);z-index:20;background:#fff;padding:24px;position:fixed;inset:auto 10px 10px}.noscript-note h2{font-size:24px}.noscript-note a{margin-right:20px}.search-content{margin-top:20px}.skill-search{grid-template-columns:1fr 180px;align-items:end;gap:22px;display:grid}.skill-search input,.skill-search select{width:100%;min-height:58px}.search-count{color:var(--muted);margin:24px 0;font-size:15px}.empty-state{max-width:650px;padding:50px 0}.path-hero{grid-template-columns:1.2fr .8fr;align-items:start;gap:60px;padding:20px 0;display:grid}.path-start{background:var(--primary-soft);border-radius:16px;padding:28px}.path-start p{font-size:17px}.path-start p:last-child{margin:0}.learning-route{max-width:880px;margin-top:36px;padding:0;list-style:none}.learning-route li{gap:25px;margin:0;padding:0 0 32px;display:flex;position:relative}.learning-route li:not(:last-child):before{content:"";background:#b9cfc0;width:1px;position:absolute;top:42px;bottom:0;left:19px}.route-dot{background:var(--primary-soft);color:var(--primary);border:1px solid #b9cfc0;border-radius:50%;flex:none;justify-content:center;align-items:center;width:40px;height:40px;font-size:15px;font-weight:600;display:flex}.learning-route h3{margin:3px 0 10px}.learning-route a{text-decoration:none}.learning-route p{margin-bottom:8px;font-size:17px}.path-card{border:1px dashed var(--control-border);border-radius:14px;max-width:850px;padding:32px}.path-card p{font-size:17px}.path-card .small{margin:22px 0 0}.print-builder-controls{padding:10px 0 25px}.print-builder-controls h1{margin-top:20px;font-size:44px}.builder-fields{flex-wrap:wrap;gap:20px;margin:26px 0;display:flex}.builder-fields label{min-width:160px;font-size:15px}.builder-fields select{width:100%}.print-builder-controls .small{margin-top:20px}.print-preview{border:1px solid var(--divider);border-radius:12px;max-width:100%;overflow:auto}.trust-copy{max-width:800px;margin:20px auto}.trust-copy h1{margin-bottom:30px}.trust-copy h2{margin-top:40px;font-size:27px}.trust-copy li,.trust-copy p{font-size:18px}.trust-copy p:last-child{margin-bottom:0}@media (width>=1500px){.home-hero{padding-top:65px}}@media (width<=1000px){.home-hero{gap:32px}.resource-hero{gap:35px}.home-hero h1{font-size:54px}.header-inner nav{gap:22px}.starting-path{padding:24px}.section-heading{gap:25px}.adult-feature{gap:30px;padding:35px}.large-fraction{font-size:78px}.preset-grid{gap:15px}.preset-card{padding:22px}.adult-help{gap:30px}.resource-hero .button-row{gap:10px}.resource-hero .button{padding:12px 15px;font-size:15px}.vocabulary-section{gap:35px}.section{margin-top:65px}}@media (width<=760px){.header-inner{padding:18px 16px}.header-inner nav{gap:18px;font-size:15px}.brand{font-size:22px}.brand svg{width:29px;height:29px}.header-inner nav>a:nth-child(2),.header-inner .search-link span{display:none}.site-main{padding:28px 18px 56px}.home-hero{grid-template-columns:1fr;gap:32px;padding:24px 0 34px}.hero-copy{max-width:620px}.home-hero h1{max-width:500px;font-size:53px}.hero-lead{font-size:20px}.fraction-lab{max-width:620px;padding:25px}.promise-strip{grid-template-columns:1fr;gap:20px;padding:26px 0}.promise-strip p{font-size:16px}.promise-strip strong{margin-right:10px;display:inline}.section-heading{display:block}.section-heading>p{max-width:600px;margin-top:20px}.section-heading>.text-link{margin-top:16px}.starting-paths{grid-template-columns:1fr}.starting-path{border:0;border-bottom:1px solid #c8d4c8;padding:24px}.starting-path h3{min-height:0;font-size:24px}.path-index{margin-bottom:16px}.adult-feature{grid-template-columns:1fr;gap:28px;padding:28px}.adult-feature-art{justify-content:start;margin-bottom:10px;padding:0 20px}.large-fraction{font-size:70px}.fold-line{display:none}.adult-feature h2{font-size:29px}.skill-list a{gap:14px;padding:22px 4px}.skill-list h3{font-size:21px}.skill-meta{flex-direction:column;align-items:end;gap:15px;font-size:12px}.footer-inner{flex-direction:column;gap:18px}.footer-inner nav{grid-template-columns:repeat(3,1fr)}.footer-bottom{flex-direction:column;gap:10px}.resource-hero{grid-template-columns:1fr;gap:28px}.resource-hero h1{font-size:39px}.worksheet-preview{width:100%;max-width:450px;margin:0 auto;padding:20px}.worksheet-preview img{max-height:480px}.worked-examples,.real-example,.adult-help,.vocabulary-section,.path-hero{grid-template-columns:1fr;gap:24px}.worked-example{padding:25px}.real-example{padding:24px}.preset-grid{grid-template-columns:1fr}.preset-card{padding:25px}.preset-links{gap:22px}.prerequisites{gap:10px 20px}.prerequisites strong{flex-basis:100%}.adult-help{padding:25px}.onward{flex-direction:column;align-items:start;padding:25px}.onward h2{font-size:28px}.practice-shell{padding:24px 16px 50px}.practice-title{font-size:25px}.question-card{padding:25px}.question-card>h2{font-size:23px}.session-controls{flex-direction:column;align-items:start;gap:12px}.practice-top{align-items:start;gap:12px}.practice-top>.small{text-align:right;max-width:140px;font-size:12px}.practice-summary{padding:25px}.result-list strong{font-size:15px}.result-list .small{font-size:13px}.skill-search{grid-template-columns:1fr}.skill-search>label:last-child{max-width:200px}.builder-fields{gap:14px}.print-builder-controls h1{font-size:36px}.path-start{padding:24px}.learning-route li{gap:18px}.learning-route h3{font-size:23px}.trust-copy{margin:10px 0}.trust-copy h1{font-size:37px}.vocabulary>div:first-child{border-top:0}}@media (width<=390px){.site-main{padding-left:16px;padding-right:16px}.home-hero h1{font-size:45px}.brand{font-size:20px}.header-inner nav{gap:14px}.hero-copy .button-row>.button{flex:auto}.lab-top{display:block}.lab-top .eyebrow{margin-bottom:3px}.fraction-lab h2{font-size:28px}.fraction-lab{padding:21px}.segmented{gap:6px}.segmented button{min-width:48px}.stepper{gap:12px}.question-card{padding:21px}.fraction-inputs{gap:14px}.fraction-inputs>label{width:95px}.fraction-fields{width:112px}.answer-choices button{flex-basis:100px}.question-card>h2{font-size:22px}.guided-panel{padding:16px}.guided-top{flex-direction:column;gap:4px}.guided-panel .fraction-inputs{gap:10px}.guided-panel .fraction-inputs>label{width:70px}.guided-panel .fraction-fields{width:100px}.guided-panel .optional{margin-left:0;display:block}.guided-panel .fraction-inputs label{font-size:12px}.resource-hero h1{font-size:35px}.footer-inner nav{grid-template-columns:repeat(2,1fr)}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition:none!important;animation:none!important}}@media print{.site-header,.site-footer,.screen-only,.skip-link{display:none!important}.site-main{max-width:none!important;margin:0!important;padding:0!important}.print-preview{border:0;border-radius:0;overflow:visible}.worksheet-page h1{font-size:21pt}.worksheet-document p{margin-top:0}.worksheet-document a{color:#111}body{background:#fff}}@page letter{size:Letter;margin:0}@page a4{size:A4;margin:0}.paper-letter .worksheet-page{page:letter}.paper-a4 .worksheet-page{page:a4}.restart-confirm{height:fit-content;margin:auto;position:fixed;inset:0;transform:none;box-shadow:0 12px 60px #172d3229}.restart-confirm::backdrop{background:#172d3266}.grid-models{flex-wrap:wrap;gap:12px;display:flex}.grid-models svg{flex:none;width:156px;max-width:100%;height:156px;display:block}.grid-models .fraction-filled,.grid-models .fraction-empty{stroke-width:.65px}.grid-guide{color:var(--muted);margin:8px 0 0;font-size:14px;line-height:1.4}.interactive-fallback{background:var(--primary-soft);border:1px solid var(--control-border);border-radius:14px;max-width:760px;margin:24px auto;padding:24px}.interactive-fallback p{margin:8px 0 16px;font-size:16px}.interactive-surface[inert] button,.interactive-surface[inert] input,.interactive-surface[inert] select{opacity:.5;cursor:wait}@media (width<=390px){.grid-models svg{width:120px;height:120px}.grid-models{gap:10px}.interactive-fallback{margin:16px;padding:18px}}.ui-icon{vertical-align:-.18em;flex:none;width:1.05em;height:1.05em;display:inline-block}.stacked-fraction{text-align:center;vertical-align:middle;flex-direction:column;line-height:1.15;display:inline-flex}.stacked-fraction>span:first-child{border-bottom:.035em solid;padding:0 .16em}.stacked-fraction>span:last-child{padding:0 .16em}:root{--canvas:#f6f5ef;--ink:#172d32;--action:#254fca;--action-hover:#193b9e;--action-soft:#eaf0ff;--night:#182f3c;--sun:#ffdb70}h1,h2{font-weight:750}.eyebrow{letter-spacing:.8px}.button{border-color:#71847f;border-radius:8px;font-weight:700}.button.primary{background:var(--action);border-color:var(--action);min-height:56px;padding:14px 24px}.button.primary:hover{background:var(--action-hover);border-color:var(--action-hover)}.button.primary:focus-visible{outline-offset:5px}.button:not(.primary):hover{background:var(--action-soft);border-color:var(--action)}.text-link{text-decoration:underline}.header-inner{padding-top:14px;padding-bottom:14px}.header-inner nav a{align-items:center;min-height:48px;display:inline-flex}.header-inner .search-link{border:1px solid var(--divider);border-radius:8px;padding:8px 14px}.site-main{padding-top:30px}.home-hero{background:var(--night);color:#fff;border-radius:16px;grid-template-columns:1.05fr 1fr;gap:44px;padding:44px}.home-hero h1{margin:22px 0 26px;font-size:clamp(44px,4.8vw,66px);line-height:1.04}.home-hero .heading-accent{color:var(--sun)}.home-hero .hero-copy>.eyebrow{color:#c5d4df}.home-hero .hero-lead{color:#e1e9ee;font-size:20px}.home-hero .hero-note{color:#c5d4df;font-size:15px;line-height:1.5}.home-hero .hero-copy .button-row{align-items:stretch;gap:12px}.home-hero .hero-copy .button.primary{background:var(--sun);border-color:var(--sun);color:var(--night);font-size:18px}.home-hero .hero-copy .button.primary:hover{background:#ffe69c;border-color:#ffe69c}.home-hero .hero-copy .button:not(.primary){color:#fff;background:0 0;border-color:#9aadb9}.home-hero .hero-copy .button:not(.primary):hover{background:#294857}.home-hero .hero-copy .button:focus-visible{outline-color:#fff}.fraction-lab{color:var(--ink);box-shadow:none;border:0;border-radius:10px;padding:28px}.fraction-lab h2{margin:18px 0 22px;font-size:29px}.fraction-lab .lab-top .eyebrow{color:var(--action)}.lab-controls{gap:20px;margin-top:24px}.lab-controls legend{font-size:16px;font-weight:700}.segmented button[aria-pressed=true]{color:#fff;background:var(--action);border-color:var(--action)}.stepper button{color:var(--action);border-color:var(--action);font-weight:700}.stepper button:hover:not(:disabled){background:var(--action-soft)}.fraction-lab .text-link{color:var(--action);padding:6px 0}.lab-foot{font-size:15px}.section{margin-top:68px}.section-heading{margin-bottom:26px}.starting-paths{background:0 0;border:none;border-radius:0;gap:20px;overflow:visible}.starting-path{--topic:#254fca;border:1px solid #d2d9e0;border-top:5px solid var(--topic);background:#fff;border-radius:10px;padding:26px}.starting-path:nth-child(2){--topic:#006d68}.starting-path:nth-child(3){--topic:#805239}.starting-path:last-child{border:1px solid #d2d9e0;border-top:5px solid var(--topic)}.starting-path:hover{border-color:var(--topic);box-shadow:0 3px 0 var(--topic);background:#fff}.path-index{color:var(--topic);background:#f2f4f5;border-radius:4px;margin-bottom:24px;padding:4px 10px;font-size:14px}.starting-path h3{letter-spacing:-.7px;min-height:65px;font-size:29px;line-height:1.12}.starting-path .text-link{color:var(--topic);justify-content:space-between;align-items:center;gap:18px;width:100%;margin-top:8px;display:flex}.starting-path .text-link>span{background:var(--topic);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:36px;height:36px;display:flex}.skill-list{border-top:2px solid var(--ink)}.skill-list a{padding:24px 18px}.skill-list a:hover{background:var(--action-soft)}.skill-list h3{color:var(--action);font-weight:700}.skill-meta>span{color:var(--action);background:#fff;border:1px solid #bbc8dc;border-radius:50%;padding:8px;display:flex}.adult-feature{color:var(--ink);background:#e6ede6;border-radius:10px;padding:36px 42px}.adult-feature .eyebrow,.adult-feature .text-link{color:var(--primary)}.adult-feature h2{font-size:34px}.resource-hero{gap:48px;padding-top:10px}.resource-hero h1{font-size:clamp(36px,4.2vw,56px)}.tags{align-items:center;margin:20px 0}.tag{background:0 0;border:none;border-radius:0;padding:2px 10px 2px 0}a.tag{color:var(--primary);text-decoration:underline}.resource-jumps{flex-wrap:wrap;gap:8px 20px;margin-top:22px;font-size:15px;display:flex}.resource-jumps a{align-items:center;min-height:44px;font-weight:600;display:inline-flex}.worksheet-preview{background:#e8dfc8;border:1px solid #cbbd9b;border-radius:10px;padding:22px 22px 0}.worksheet-preview:hover{background:#ded1b1}.worksheet-preview img{max-height:430px}.worksheet-preview span{color:#463d29;padding:16px 0;font-size:14px;font-weight:700;text-decoration:underline}.download-details{margin-top:16px}.worked-example{border-color:#ced8dc;border-radius:10px}.example-number{color:var(--action);font-size:14px}.example-answer{border-left:4px solid var(--primary);border-radius:0 6px 6px 0}.real-example{border-radius:10px}.preset-card{border-top:4px solid var(--primary);border-radius:10px;padding:26px}.preset-card[data-preset=independent]{border-top-color:var(--action)}.preset-card[data-preset=review-apply]{border-top-color:#805239}.preset-kicker{color:var(--muted);margin-bottom:14px;font-size:14px;font-weight:700}.preset-card h3{font-size:27px}.preset-card .button{width:100%}.preset-links a{align-items:center;min-height:44px;display:inline-flex}.preset-links{gap:4px 20px;margin-top:12px}.adult-help{border-radius:10px}.onward{background:#eaf0ff;border-color:#c7d4f0;border-radius:10px}.path-hero{border-top:4px solid var(--action);padding-top:30px}.path-start{background:#e9edf2;border-left:4px solid #788d9f;border-radius:0 10px 10px 0}.path-start h2{font-size:24px}.route-dot{background:var(--action);color:#fff;border:0;font-weight:700}.learning-route a{min-height:48px;color:var(--action);text-decoration:underline;display:inline-flex}.learning-route h3{font-size:26px}.learning-route li{padding-bottom:30px}.path-card{background:#f5e6ba;border:1px solid #cebb85;border-radius:10px;max-width:none}.path-card h2{font-size:34px}.practice-title{font-size:28px}.question-progress{color:var(--ink);font-size:16px;font-weight:700}.progress-track>span{height:7px}.progress-track>span.current{background:var(--action)}.question-card{border:1px solid #c8d2df;border-top:4px solid var(--action);border-radius:10px}.question-card>h2{font-size:29px;font-weight:700}.mode-control button[aria-pressed=true]{background:var(--night);color:#fff}.answer-choices button.selected,.point-options button.selected{border-color:var(--action);background:var(--action-soft);color:var(--action-hover)}.answer-actions .button.primary{min-width:185px;font-size:18px}.help-actions .text-button{border:1px solid #c3cbd1;border-radius:6px;padding:10px 14px}.practice-tools{color:var(--muted)}.print-builder-controls{border-top:4px solid var(--action);padding:24px 0 30px}.builder-fields{background:#e9edf2;border-radius:10px;padding:24px}.builder-fields label{font-weight:700}@media (width<=1050px){.home-hero{gap:30px;padding:30px}.home-hero h1{font-size:50px}.starting-path{padding:22px}.starting-path h3{font-size:26px}.resource-hero{gap:30px}}@media (width<=760px){.site-main{padding-top:18px}.header-inner{gap:12px;padding-top:10px;padding-bottom:10px}.header-inner .search-link{min-width:48px;padding:8px 12px}.home-hero{border-radius:10px;grid-template-columns:1fr;gap:28px;padding:26px 22px}.home-hero h1{letter-spacing:-1.6px;margin:18px 0 24px;font-size:clamp(39px,8vw,52px)}.home-hero .hero-lead{font-size:18px;line-height:1.55}.home-hero .hero-copy .button{width:100%}.home-hero .hero-copy .button.primary{padding-left:14px;padding-right:14px;font-size:17px}.home-hero .hero-note{font-size:14px}.fraction-lab{padding:22px}.fraction-lab h2{font-size:26px}.lab-top{display:block}.lab-top .eyebrow{margin-bottom:6px}.lab-controls legend{font-size:15px}.segmented{gap:6px}.segmented button{min-width:48px;min-height:48px}.stepper{gap:10px;font-size:15px}.stepper>div{gap:10px}.section{margin-top:50px}.starting-paths{grid-template-columns:1fr;gap:16px}.starting-path h3{min-height:0;margin-bottom:14px;font-size:28px}.path-index{margin-bottom:18px}.starting-path p{margin-bottom:12px}.adult-feature{padding:28px}.resource-hero{grid-template-columns:1fr;gap:26px}.resource-hero h1{font-size:38px}.resource-hero .button-row{align-items:stretch}.resource-hero .button-row .button{width:100%}.resource-jumps{gap:2px 18px}.worksheet-preview img{max-height:390px}.preset-grid{grid-template-columns:1fr}.question-card{padding:24px}.question-card>h2{font-size:24px}.path-hero{grid-template-columns:1fr;padding-top:24px}.path-card h2{font-size:29px}.builder-fields{padding:20px}}@media (width<=390px){.home-hero{padding:24px 18px}.fraction-lab{padding:20px 16px}.segmented{gap:4px}.segmented button{min-width:48px}.question-card{padding:20px}.question-card>h2{font-size:23px}.resource-hero h1{font-size:34px}}.catalog-readiness{max-width:760px;color:var(--muted);margin:18px 0 0;font-size:17px;line-height:1.6}.catalog-section .section-heading{align-items:start}.catalog-section .section-heading>.text-link{flex:none;align-items:center;gap:8px;min-height:48px;display:inline-flex}.jump-links a{min-height:48px;color:var(--action);border-color:#a9b9d9;align-items:center;padding:10px 16px;font-size:16px;font-weight:600;display:inline-flex}.jump-links a:hover{background:var(--action-soft);border-color:var(--action)}.skill-search input:focus-visible{outline-color:var(--action)}@media (width>=761px) and (width<=900px){.home-hero{grid-template-columns:1fr;gap:30px}.home-hero .hero-copy{max-width:650px}.fraction-lab{max-width:none}.fraction-lab h2{margin-top:12px}.lab-controls{flex-direction:row;justify-content:space-between;align-items:end;gap:24px}.lab-controls .stepper{flex-direction:column;align-items:start;gap:10px}}.brand-mark{flex:none;display:block}@media (width<=760px){.brand-mark{width:29px;height:29px}}
