:root{--control-height:44px;--control-gap:8px;--workspace-gap:8px;--panel-gap:12px;--content-gap:16px;--page-gutter:12px;--card-radius:18px;--tab-radius:14px;--card-padding:20px;--playback-height:114px}@media screen{ :is(#app,dialog) button:is(.primary,.secondary:not(.assessment-review-question),.control-outline,.control-text){border-radius:var(--control-radius,14px)!important;box-shadow:none!important} :is(#app,dialog) button.primary:not(:disabled){background:var(--brand)!important;color:white!important;border-color:transparent!important} :is(#app,dialog) button.secondary:not(.assessment-review-question):not(:disabled){background:var(--surface-selected)!important;color:var(--text)!important;border:1px solid transparent!important} :is(#app,dialog) button.control-outline{border:1px solid var(--line)!important} :is(#app,dialog) button.control-outline:not(:disabled){background:var(--surface)!important;color:var(--brand)!important} :is(#app,dialog) button.control-outline[aria-pressed=true]:not(:disabled){background:var(--surface-selected)!important;border-color:var(--brand)!important} :is(#app,dialog) button.control-text{background:transparent!important;border:0!important} :is(#app,dialog) button.control-text:not(:disabled){color:var(--brand)!important}#app #lesson-screen:is([data-stage=Watch],[data-stage=Check]) #answer-slot{min-width:66px!important;min-height:24px!important}#app #lesson-screen[data-stage=Watch] :is(.fraction-method-question,.same-denominator-question) .fraction-quantity{min-height:0}#app #lesson-screen[data-stage=Watch] .same-denominator-question #answer-slot{height:min(80px,calc(var(--question-band-height) - 6px))!important}#app #lesson-screen[data-stage=Watch] #model>.math-stroke{stroke-width:max(2.2px,calc(var(--cell)*.035))}#app #lesson-screen .method-board{position:relative}#app .learning-paper-controls{position:absolute;right:8px;bottom:8px;z-index:30;display:flex;gap:6px}#app .learning-paper-controls>button{display:flex;align-items:center;justify-content:center;width:44px;height:44px;min-height:44px;padding:8px}#app #lesson-screen #learning-paper-view.learning-paper-expanded{position:fixed!important;inset:0!important;z-index:150;display:block!important;width:100vw!important;height:100dvh!important;max-width:none!important;max-height:none!important;min-height:0!important;margin:0!important;padding:0!important;overflow:hidden!important;background:var(--surface,#fff)}#app #lesson-screen #learning-paper-view.learning-paper-expanded>:is(.lesson-guide,.method-board){display:none!important}#app #lesson-screen #learning-paper-view.learning-paper-expanded>.method-board.paper-expanded-active{display:flex!important;position:absolute;inset:0;width:100%;height:100%;max-height:none!important;min-height:0!important;margin:0!important;padding:0!important}#app #lesson-screen #learning-paper-view.learning-paper-expanded .workspace-title{display:none!important}#app #lesson-screen #learning-paper-view.learning-paper-expanded #paper-scroll{width:100%;height:100%;overflow:hidden!important}#app:has(.learning-paper-expanded)>header,#app #lesson-screen:has(.learning-paper-expanded)>:not(.lesson-layout){visibility:hidden}#app #lesson-screen{gap:var(--workspace-gap);padding-top:var(--workspace-gap)}#app #lesson-screen :is(#work-preferences,#phone-workbook-tabs,#assessment-paper-tabs){margin-block:0}#app #lesson-screen[data-compact-practice=true] #practice-toolbar,#app #lesson-screen[data-stage=Assessment] #assessment-toolbar{margin:0}#app #lesson-screen #question-heading:empty{display:none}#app #lesson-screen #ink-tools,#app #lesson-screen #assessment-toolbar #work-preferences>#ink-tools,#app #lesson-screen[data-compact-practice=true] #practice-toolbar>#ink-tools,#app #mental-note-tools{gap:var(--control-gap)}#app #lesson-screen :is(.lesson-toolbar,#work-preferences):empty{display:none}#app #lesson-screen[data-inline-hint=true] .lesson-layout{gap:var(--workspace-gap) var(--panel-gap)!important}#app #lesson-screen[data-practice-tabs=true]:not([data-check-lesson=true]) .lesson-layout{gap:var(--workspace-gap) var(--panel-gap)!important}#app #lesson-screen[data-practice-tabs=true] .lesson-layout>.method-board:not([hidden]){flex:1 1 0!important;min-height:0!important}#app #mental-run-screen{padding-top:var(--workspace-gap);padding-bottom:var(--page-gutter);gap:var(--workspace-gap)}#app #mental-run-screen>.mental-run-toolbar{margin:0}#app #mental-run-screen[data-input-mode=Type]>.mental-run-toolbar{display:none}#app #mental-run-workspace{gap:var(--panel-gap)}#app #mental-screen{gap:var(--workspace-gap);padding-top:var(--workspace-gap)}#app :is(#ink-tools,#mental-note-tools)[data-pen-popup=true]{display:flex;grid-template-columns:none}#app :is(#ink-tools,#mental-note-tools)[data-pen-popup=true]>button:not(.pen-tools-open){display:none!important}#app :is(#ink-tools,#mental-note-tools)>.pen-tools-open{flex:1;min-width:0;min-height:44px}#app .pen-tools-open{display:inline-flex;align-items:center;justify-content:center;gap:6px}#app .disclosure-triangle{width:9px;height:6px;flex:none;fill:currentColor;transition:transform .12s}#app .pen-tools-open[aria-expanded=true] .disclosure-triangle{transform:rotate(180deg)}#pen-tools-menu{position:fixed;z-index:300;display:grid;grid-template-columns:1fr;gap:4px;width:min(220px,calc(100vw - 24px));max-height:calc(100dvh - 24px);overflow:auto;box-sizing:border-box;padding:8px;background:var(--surface,#fff);border:1px solid var(--line);border-radius:14px;box-shadow:0 8px 24px var(--tone-203b5a26)}#pen-tools-menu[hidden]{display:none!important}#pen-tools-menu button{min-height:44px;margin:0;padding:8px 12px;font-size:16px;text-align:left;border-radius:8px}#pen-tools-menu button[aria-checked=true]{background:var(--surface-selected,var(--tone-e4efff));color:var(--ink);font-weight:700}#app>header{display:grid;grid-template-columns:110px minmax(0,1fr) 110px;grid-template-rows:44px;align-items:center;flex:0 0 44px;height:44px;min-height:44px;max-height:44px;width:100%;margin:0;padding:0 max(var(--page-gutter),env(safe-area-inset-right,0px)) 0 max(var(--page-gutter),env(safe-area-inset-left,0px));gap:8px;box-sizing:border-box;overflow:visible}#app>header #app-navigation{display:flex;align-items:center;height:44px;grid-column:1;grid-row:1;justify-self:start;min-width:0}#app>header #tools{grid-column:3;grid-row:1;justify-self:end}#app>header :is(#navigation-toggle,#tools){display:inline-flex;align-items:center;justify-content:center;gap:6px;margin:0;padding:6px 0;height:44px;min-height:44px;line-height:1.2;white-space:nowrap;font-size:16px}#app>header #navigation-toggle[data-direct-home]{padding-inline:0;font-size:16px}#app>header :is(#navigation-toggle,#tools)>span{font:inherit;line-height:inherit}#app #header-context[data-page-heading=true] #mode-label{max-width:100%}#app>header .header-icon{display:block;flex:none;width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}#app>header #year-brand{display:block;width:28px;height:28px;object-fit:contain}#app[data-screen=years] #home-brand img{display:none}#app>header #lesson-journey ol{margin:0;padding:0;align-items:center}#app>header #lesson-journey li{padding:0;height:44px;min-height:44px;display:flex;align-items:center}#app>header #lesson-journey button{height:44px;min-height:44px;max-height:44px;padding:4px 14px;line-height:1.2;white-space:nowrap;position:relative;isolation:isolate}#app>header #lesson-journey button[aria-current=step]{background:transparent}#app>header #lesson-journey button[aria-current=step]::before{content:"";position:absolute;inset:4px 0;background:var(--brand);border-radius:12px;z-index:-1}#app>header #stage-toggle{height:44px;min-height:44px;max-height:44px;box-sizing:border-box;line-height:1.2}#app>header :is(#stage-toggle,#lesson-journey button):focus-visible{outline-offset:-3px}#app #header-context[data-practice-progress=true]{display:flex;flex-direction:row;align-items:center;gap:8px}#app #header-context[data-practice-progress=true] #mode-label{font-size:22px;font-weight:600;line-height:1.2;min-width:0;color:var(--ink)}#app #header-progress{flex:none;white-space:nowrap;margin:0;font-size:14px;line-height:1.2}#app #header-context[data-page-note=true]{display:block;text-align:center;font-size:22px;line-height:1.2}#app #header-context[data-page-note=true] #mode-label{display:inline}#app #header-note{font-size:16px;font-weight:400;color:var(--text-soft);line-height:1.2}html[data-input-method=pointer] #app button:focus{outline:none;box-shadow:none}html[data-input-method=pointer] dialog button:focus{outline:none}html[data-input-method=pointer] :is(#app,dialog) input:focus{outline:none}#app #mental-run-screen #mental-run-navigation,#app #lesson-screen #assessment-footer{margin:0;padding:0;min-height:var(--control-height)} :is(#app,dialog) .segmented-control{display:flex;align-items:stretch;flex-shrink:0;min-height:52px!important;height:auto!important;max-height:none!important;gap:4px;padding:3px!important;border:1px solid var(--line);border-radius:var(--tab-radius);background:white;overflow:visible;box-sizing:border-box} :is(#app,dialog) .segmented-control>button{box-sizing:border-box;flex:1 1 0;min-width:0;min-height:var(--control-height);margin:0;padding:6px 8px;border:0;border-radius:10px;background:transparent;color:var(--ink);line-height:1.2;text-align:center}#app .segmented-control>button:is([aria-selected=true],[aria-pressed=true]){background:var(--brand);color:white;font-weight:600}#app :is(#print-screen,#method-screen,#mental-setup-screen){--options-inset:18px;--options-gap:14px}#app>#print-screen{display:flex;flex:0 0 auto;height:calc(var(--app-height,100dvh) - 64px);flex-direction:column;justify-content:flex-start;min-height:0;max-height:calc(var(--app-height,100dvh) - 64px);width:min(940px,calc(100% - 24px));margin:8px auto 12px;padding:var(--options-inset);gap:var(--options-gap);overflow:hidden;box-sizing:border-box}#app #print-content{flex:1 1 auto;display:flex;flex-direction:column;gap:var(--panel-gap);min-height:0;overflow:visible}#app #print-screen .print-advice{margin:0;font-size:17px;line-height:1.4;text-align:center}#app :is(#print-screen,#method-screen) .print-choices{display:flex;flex:none;width:100%;margin:0;padding:3px;gap:4px;box-sizing:border-box}#app :is(#print-screen,#method-screen) .print-choices button{font-size:16px;font-weight:500;line-height:1.2;min-width:0;padding:6px 4px;border-radius:10px;flex:1}#app #print-settings{display:flex;flex-direction:column;gap:var(--panel-gap)}#app #print-screen .print-selection{flex-wrap:wrap}#app #print-screen .print-selection label{display:flex;flex:0 1 190px;flex-direction:row;align-items:center;gap:10px;text-align:left;font-size:16px}#app #print-screen .print-selection #print-sheet-field{min-width:104px}#app #print-screen .print-selection label>span{text-align:left}#app #print-screen select{width:100%;min-height:44px}#app #print-screen .print-footer{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:inherit}#app #print-screen .print-footer button{min-width:0;display:flex;align-items:center;justify-content:center;text-align:center;white-space:normal;height:100%;padding:4px 8px;font-size:16px;line-height:1.2}#app #print-submit{grid-column:auto}#app #print-format{display:flex;flex:none;gap:4px;border:1px solid var(--line);border-radius:14px;padding:4px;margin:0;min-width:0;font-size:14px}#app #print-format label{position:relative;flex:1;display:flex;align-items:center;justify-content:center;min-height:40px;padding:4px 8px;border-radius:10px;cursor:pointer;box-sizing:border-box}#app #print-format input{position:absolute;inset:0;opacity:0;width:100%;height:100%;margin:0;cursor:pointer}#app #print-format label:has(:checked){background:var(--brand);color:white}#app #print-format label:has(:focus-visible){outline:2px solid var(--brand);outline-offset:2px}#app :is(#print-submit,#method-screen[data-lesson-guide=true] #method-continue){width:100%;min-height:44px;font-size:18px;font-weight:600;line-height:1.2}#app #lesson-guide-methods{display:grid;flex:1 0 auto;grid-template-columns:repeat(4,minmax(0,1fr));grid-auto-rows:minmax(72px,1fr);gap:12px;padding-block:var(--options-inset) 0}#app #lesson-guide-methods button{min-height:72px;padding:12px;font-size:18px;text-align:center;white-space:pre-line}#app #print-selection-summary{display:flex;flex:none;align-items:center;justify-content:space-between;gap:12px;min-height:40px}#app #print-selection-summary h2{flex:1;min-width:0;margin:0;font-size:22px;line-height:1.3;text-align:center}#app #print-selection-summary.centred-title h2{text-align:center}#app #print-screen #print-selection-summary .print-selection{display:none;flex:0 0 120px;margin:0}#app #print-sheet{min-width:0}#app #print-sheet-label[hidden]{display:none!important}#app #print-change-selection{display:none}#app #print-sheet-numbers{display:flex;flex:none;gap:6px;flex-wrap:wrap;align-items:center;justify-content:center}#app #print-sheet-numbers button{flex:1;min-width:32px;height:38px;min-height:38px;padding:3px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);font-size:15px}#app #print-sheet-numbers button[aria-pressed=true]{background:var(--brand);border-color:var(--brand);color:white}#app #print-output{flex:none;display:flex;gap:4px;padding:3px;min-height:42px;box-sizing:border-box}#app #print-output button{flex:1;min-width:0;font-size:15px;padding:5px;min-height:34px}#app :is(#print-options-disclosure,.support-options-disclosure){min-height:0;margin:0;padding:0;border:0;overflow:auto;overscroll-behavior:contain}#app #print-options-disclosure>summary{display:none}#app #print-screen .print-options>.option-row{grid-column:auto;grid-row:auto}#app #print-screen[data-print-choosing=true]{gap:0}#app #print-screen[data-print-choosing=false]{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-template-rows:52px minmax(0,1fr) 48px}#app #print-screen>.print-choices{grid-column:1/-1;grid-row:1}#app #print-screen[data-print-choosing=false]>#print-content{grid-column:1;grid-row:2}#app #print-screen>.print-footer{grid-column:1/-1;grid-row:3}#app #print-preview{grid-column:2;grid-row:2}#app .print-preview-body{flex:1;min-height:0;position:relative;overflow:hidden}#app .print-preview-body>div{position:absolute;transform-origin:top left}#app #print-model-operations-option{grid-column:auto}#app .option-row,#tools-dialog .option-row{touch-action:manipulation;cursor:pointer}#app .option-row input,#tools-dialog .option-row input{touch-action:manipulation;cursor:pointer}#app .option-row input::before,#tools-dialog .option-row input::before{pointer-events:none}#app :is(#method-screen,#mental-setup-screen,#print-screen) .option-row,#tools-dialog .settings-panel .option-row{display:grid;position:relative;isolation:isolate;flex:none;grid-template-columns:76px minmax(0,1fr);grid-template-rows:auto auto;column-gap:8px;row-gap:8px;align-items:center;width:100%;margin:0 0 12px;padding:0 0 12px;border:0;border-bottom:1px solid var(--line);border-radius:0;box-sizing:border-box;text-align:left}#app :is(#method-screen,#mental-setup-screen,#print-screen) .option-row:last-child,#tools-dialog .settings-panel .option-row:last-child{margin-bottom:0;border-bottom:0}#app :is(#method-screen,#mental-setup-screen,#print-screen) .option-row::before,#tools-dialog .settings-panel .option-row::before{content:"";grid-column:1/-1;grid-row:1;align-self:stretch;min-height:52px;border-radius:10px;background:var(--surface-soft);z-index:0}#app :is(#method-screen,#mental-setup-screen,#print-screen) .option-row .option-copy,#tools-dialog .settings-panel .option-row .option-copy{display:contents}#app :is(#method-screen,#mental-setup-screen,#print-screen) .option-row .option-copy>span:first-child,#tools-dialog .settings-panel .option-row .option-copy>span:first-child{position:relative;grid-column:2;grid-row:1;padding:12px 12px 12px 0;font-size:20px;line-height:1.3;text-align:left;z-index:1}#app :is(#method-screen,#mental-setup-screen,#print-screen) .option-row .option-description,#tools-dialog .settings-panel .option-row .option-description{display:block;grid-column:1/-1;grid-row:2;padding:0 4px;margin:0;font-size:17px;line-height:1.4;text-align:left}#app :is(#method-screen,#mental-setup-screen,#print-screen) .option-row input,#tools-dialog .settings-panel .option-row input{position:relative;grid-column:1;grid-row:1;justify-self:center;align-self:center;margin:0;z-index:1}#app #test-overview{display:flex;flex-direction:column;flex:1;min-height:0;max-height:none;gap:var(--workspace-gap);padding:8px 0 12px;overflow:hidden}#app #test-overview #test-kind-selector{flex:none;width:100%}#app #test-overview-content{flex-direction:column;overflow:auto;overscroll-behavior:contain}#app #test-overview .test-start-card{display:block;flex:none;align-self:stretch;padding:0;margin:0}#app #test-overview #test-start-title[hidden]{display:none}#app #test-overview #test-start-description{margin:0;font-size:18px;line-height:1.35;text-align:center}#app #test-overview .test-history-card{flex:1 1 0;max-height:none;padding:var(--card-padding);gap:12px;box-sizing:border-box}#app #test-overview :is(#score-chart,#mental-score-chart){flex:1 1 0;min-height:80px;height:auto;max-height:none}#app #test-overview-footer{flex:none;margin:0;padding:0}#app #test-overview-footer #start-test{width:100%;margin:0;min-height:44px}#app #lesson-screen:not([data-compact-practice=true]):not([data-phone-view=writing]) #step-copy{display:flex!important;flex-direction:column;align-items:center;justify-content:flex-start;grid-template-columns:none;gap:0}#app #lesson-screen #teaching-copy-content{flex:none;width:100%;max-width:760px;min-width:0;margin-block:auto;text-align:center}#app #lesson-screen:not([data-phone-view=writing]):is([data-stage=Watch],[data-stage=Check],[data-stage=Follow],[data-stage=Together]) .lesson-guide{display:flex!important;flex-direction:column;flex:1 1 0;min-height:0;max-height:100%;height:100%;overflow:hidden;box-sizing:border-box}#app #lesson-screen:not([data-phone-view=writing]):is([data-stage=Watch],[data-stage=Check],[data-stage=Follow],[data-stage=Together]) #step-copy{flex:1 1 0!important;min-height:0!important;max-height:none!important;height:auto!important;overflow:auto!important}#app #lesson-screen:not([data-phone-view=writing]):is([data-stage=Watch],[data-stage=Check],[data-stage=Follow],[data-stage=Together]) :is(#lesson-actions,#teaching-navigation){flex:none}#app #lesson-screen #caption{font-size:clamp(22px,2.2vw,32px);line-height:1.35}#app #lesson-screen .lesson-guide{position:relative}#app #lesson-screen:not([data-fixed-playback=true]):not([data-compact-practice=true]) :is(#lesson-actions,#teaching-navigation){position:relative;top:4px}#app #mental-screen .mental-navigation{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;padding:0;width:100%}#app #mental-screen .mental-navigation>button{width:100%;max-width:none;min-height:44px;margin:0}#app #mental-screen #mental-example-count{display:none}#app :is(#paper-scroll,#check-paper-scroll){position:relative}#app #lesson-screen :is(#paper-scroll,#check-paper-scroll){display:block;overflow-anchor:none}#app #lesson-screen #model{overflow:visible}#app #lesson-screen :is(#paper,#check-paper){position:relative;display:block;flex:none;min-height:0;max-height:none;top:0;left:auto;right:auto;bottom:auto;margin:0 auto;align-self:auto;justify-self:auto;overflow:clip}#app #lesson-screen #paper>#printed-question{position:sticky;display:flex;top:0;left:auto;right:auto;bottom:auto;margin:0;transform:none;height:var(--question-band-height,var(--cell));width:100%;box-sizing:border-box;flex:none;z-index:12}#app #lesson-screen #ink{z-index:13}#app #lesson-screen :is(#completed-board,#test-check-board)[hidden]{display:none!important}#app #lesson-screen #answer-board[hidden]{display:none!important}#app #lesson-screen #assessment-paper-tabs{display:flex;flex:none;width:100%;margin:0}#app #lesson-screen #assessment-paper-tabs[hidden]{display:none!important}#app #lesson-screen[data-stage=Assessment] .lesson-layout{flex-direction:column;gap:0}#app #lesson-screen[data-stage=Assessment] #test-check-board{flex:1 1 0;min-height:0;visibility:visible}#app #lesson-screen[data-stage=Assessment] .check-question{position:sticky;top:0;z-index:12;min-height:var(--check-cell);height:var(--check-cell);padding:8px 12px;box-sizing:border-box;background:white}#app #lesson-screen[data-stage=Assessment] #test-check-method{display:block;margin:0;font-size:20px;line-height:1.3;text-align:center;white-space:normal}#app #lesson-screen[data-stage=Assessment] .check-result-label[hidden]{display:none!important}#app #lesson-screen[data-stage=Assessment] #check-paper>.check-question[hidden]{display:none!important}#app #lesson-screen[data-stage=Assessment] #check-paper::before{display:none}#app #lesson-screen .question-content.uniform-question{display:flex;align-items:center;justify-content:center;flex-wrap:nowrap;gap:calc(var(--qcell)*.28);height:auto;max-width:100%;width:max-content}#app #lesson-screen .uniform-question .question-token{flex:none;height:var(--qcell);grid-column:auto;grid-row:auto}#app #lesson-screen .uniform-question .question-token.word{font-size:max(16px,calc(var(--qcell)*.5))}#app #lesson-screen .uniform-question .question-token.fraction{font-size:max(15px,calc(var(--qcell)*.4))}#app #lesson-screen .uniform-question #answer-slot{flex:none;align-self:center;grid-column:auto;grid-row:auto;box-sizing:border-box}#app #lesson-screen .uniform-question .question-sentence{flex:1;min-width:0;font-size:18px;line-height:1.25;text-align:left;white-space:normal}#app #lesson-screen[data-keypad-open=true][data-keypad-placement=paper]:not([data-with-check=true]):not([data-check-lesson=true]) .lesson-guide{display:none!important}#app #keypad-dialog.inline-keypad{position:absolute;inset:0;transform:none;width:auto;max-width:none;height:auto;max-height:none;margin:0;padding:12px;display:flex;flex-direction:column;gap:8px;background:white;border:0;border-radius:inherit;box-shadow:none;z-index:32;box-sizing:border-box;overflow:hidden}#app #keypad-dialog.inline-keypad[data-placement=paper]{inset-inline:1px;bottom:1px;border-radius:0 0 16px 16px}#app #keypad-dialog .dialog-heading{display:flex;flex:none;align-items:center;justify-content:space-between;gap:8px;margin:0}#app #keypad-dialog #keypad-title{margin:0;font-size:24px}#app #keypad-dialog #close-keypad{min-height:44px;min-width:76px;padding:6px 14px;background:var(--brand);color:white}#app #keypad-dialog #keypad{display:flex;flex:1;flex-direction:column;gap:8px;min-height:0;margin:0}#app #keypad-dialog #digit-keys{display:grid;flex:1;min-height:0;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px}#app #keypad-dialog #digit-keys button{min-height:44px;font-size:clamp(22px,2.4vw,32px);padding:6px}#app #keypad-dialog #heading-keys{display:grid;order:-1;flex:1;min-height:0;grid-template-columns:repeat(5,minmax(0,1fr));gap:6px;margin:0}#app #keypad-dialog .extra-keys{display:grid;flex:none;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}#app #keypad-dialog :is(.extra-keys button,#heading-keys button){min-height:44px;padding:6px;font-size:16px}#app #keypad-dialog button{box-sizing:border-box;margin:0;min-width:0;max-width:none}#app #keypad-dialog[data-compact=true]{padding:6px;gap:6px}#app #keypad-dialog[data-compact=true] .dialog-heading{display:none}#app #keypad-dialog[data-compact=true] #keypad{gap:6px}#app #lesson-screen[data-keypad-compact=true] :is(#work-preferences,#assessment-toolbar,#practice-toolbar,#practice-footer,#assessment-paper-tabs,#learning-toolbar,#phone-playback-footer){display:none!important}#app .type-line-targets{position:absolute;inset:0;z-index:10;pointer-events:none}#app .type-line-target{position:absolute;min-height:0;margin:0;padding:0;border:0;border-radius:6px;background:var(--tone-e3efff);pointer-events:auto;opacity:.8}#app .type-line-target::after{content:"";position:absolute;left:0;right:0;top:50%;border-top:2px dashed var(--brand)}#app .type-line-target.placed{background:transparent;opacity:0;pointer-events:none}#app #lesson-screen{min-height:0;max-height:100%;overflow:hidden}#app #lesson-screen .lesson-layout{flex:1 1 0;min-height:0!important;height:auto;overflow:hidden;gap:var(--workspace-gap) var(--panel-gap)}#app #lesson-screen .method-board{min-height:0!important;max-height:100%;overflow:hidden}#app #lesson-screen:is([data-compact-practice=true],[data-stage=Assessment]) .method-board{flex:1 1 0}#app #lesson-screen :is(#paper-scroll,#check-paper-scroll){min-height:0!important;overflow:auto;overscroll-behavior:contain}#app #lesson-screen #completed-board{overflow:auto;overscroll-behavior:contain;touch-action:pan-y}#app #lesson-screen:is([data-stage=Watch],[data-stage=Check]) :is(#paper-scroll,#paper,#ink){touch-action:pan-y}#app #mental-run-screen #mental-run-question-panel{justify-content:center}#app #mental-run-screen #mental-run-question-panel .mental-answer-line{padding:16px;margin:auto 0;flex-wrap:nowrap;font-size:var(--mental-question-font,32px);gap:10px}#app #mental-run-screen #mental-run-question-panel .mental-answer-line input{width:3.6em;min-height:56px}#app #mental-run-screen[data-kind=test]:not([data-phase=question]){padding:0;min-height:0}#app #mental-run-screen[data-kind=test]:not([data-phase=question])>.mental-run-toolbar{display:none}#app :is(#check-screen,#result-screen).assessment-card,#app #mental-run-screen #mental-run-summary.assessment-card{display:flex;flex:1;flex-direction:column;align-self:center;width:min(940px,calc(100% - 24px));max-width:940px;min-width:0;min-height:0;max-height:none;margin:0 auto 12px;padding:var(--card-padding);gap:14px;box-sizing:border-box;border:1px solid var(--line);border-radius:var(--card-radius);background:white;overflow:hidden}#app :is(#check-screen,#result-screen,#mental-run-summary).assessment-card :is(h1,h2){margin:0;font-size:28px;line-height:1.2;text-align:center}#app :is(#check-screen,#result-screen,#mental-run-summary).assessment-card :is(#result-message,#mental-run-summary-message,#review-help){margin:0;font-size:17px;line-height:1.4;text-align:center}#app :is(#check-screen,#result-screen,#mental-run-summary).assessment-card .review-heading{flex:none;margin:0}#app :is(#check-screen,#result-screen,#mental-run-summary).assessment-card :is(#question-overview,#mental-run-summary-list){flex:1;min-height:0;overflow:auto;margin:0}#app :is(#check-screen,#result-screen,#mental-run-summary).assessment-card :is(#question-overview,#mental-run-summary-list),#app :is(#result-screen,#mental-run-summary).assessment-card .assessment-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-template-rows:none;grid-auto-rows:max-content;gap:10px;align-content:start;padding:0}#app :is(#check-screen,#result-screen,#mental-run-summary).assessment-card .assessment-review-question{display:flex;align-items:center;gap:10px;width:100%;min-height:88px;margin:0;padding:12px;font-size:17px;text-align:left;border:1px solid var(--line);border-radius:12px;background:var(--surface-soft);box-sizing:border-box}#app :is(#check-screen,#mental-run-summary).assessment-card .assessment-review-question .review-number{flex:none;font-size:20px;font-weight:600}#app :is(#check-screen,#mental-run-summary).assessment-card .assessment-review-question .review-topic{display:block;flex:1;min-width:0;font-size:17px;line-height:1.35;font-weight:400;text-align:left;overflow-wrap:anywhere}#app :is(#check-screen,#mental-run-summary).assessment-card .assessment-review-question .review-state{display:block;flex:none;width:76px;font-size:13px;line-height:1.3;text-align:center;white-space:normal}#app :is(#check-screen,#mental-run-summary).assessment-card .assessment-review-question.checked{border-color:#a3cdb3;background:#f0f8f2}#app :is(#check-screen,#mental-run-summary).assessment-card .assessment-review-question.checked .review-state{color:#246043;font-weight:700}#app :is(#check-screen,#mental-run-summary).assessment-card .assessment-review-question.unanswered{border-color:#d8bc80;background:#fff9ed}#app :is(#check-screen,#mental-run-summary).assessment-card .assessment-review-question.unanswered .review-state{color:#79520c;font-weight:700}#app :is(#check-screen,#mental-run-summary).assessment-card .review-given{display:block;margin-top:5px;font-size:15px;line-height:1.3;color:var(--ink);text-align:left}#app #pre-test{display:flex;flex:1 1 0;min-height:0;max-height:none;width:min(940px,calc(100% - 24px));margin:0 auto 12px;overflow:hidden;gap:14px}#app #pre-test :is(#pre-test-kind,.actions){flex:none}#app #pre-test #pre-test-prompts{flex:1 1 0;min-height:0;overflow:auto;grid-auto-rows:minmax(max-content,1fr);align-content:stretch}#app #pre-test #pre-test-prompts p{display:flex;align-items:center;justify-content:center;min-height:0;font-size:clamp(18px,2.4vw,24px);line-height:1.4}#app :is(#check-screen,#mental-run-summary).assessment-card .review-count{margin:0;font-size:16px;font-weight:400;line-height:1.3;color:var(--text-soft)}#app #check-screen #review-summary{margin:0;font-size:16px;font-weight:400;line-height:1.3;color:var(--text-soft)}#app :is(#check-screen,#mental-run-summary).assessment-card #mental-review-help{margin:0;font-size:17px;line-height:1.4;text-align:center}#app :is(#result-screen,#mental-run-summary).assessment-card :is(#result-detail,#mental-run-summary-list) .assessment-answer-row{padding:12px;border:1px solid var(--line);border-radius:12px;background:white;box-sizing:border-box}#app :is(#result-screen,#mental-run-summary).assessment-card :is(#result-detail,#mental-run-summary-list) .assessment-answer-row :is(.assessment-calculation,.assessment-answer-state){display:block;min-height:0;margin:0;padding:0;font-size:18px;line-height:1.35;text-align:center}#app :is(#result-screen,#mental-run-summary).assessment-card :is(#result-detail,#mental-run-summary-list) .assessment-answer-row .assessment-answer-state{margin-top:6px;font-size:15px}#app :is(#check-screen,#result-screen,#mental-run-summary).assessment-card :is(.completion-actions,.review-footer){display:grid;grid-template-columns:repeat(2,minmax(0,1fr));flex:none;gap:10px;width:100%;margin-top:auto}#app #check-screen.assessment-card .review-footer{grid-template-columns:1fr}#app :is(#check-screen,#result-screen,#mental-run-summary).assessment-card :is(.completion-actions,.review-footer)>button{min-width:0;min-height:44px;margin:0}#app :is(#result-screen,#mental-run-summary).assessment-card .completion-actions>:is(#result-next,#result-scores,#mental-run-more,#mental-run-summary-action){grid-column:auto;grid-row:auto;width:100%;max-width:none}#app #mental-run-screen[data-phase=review] #mental-run-summary.assessment-card .completion-actions{grid-template-columns:1fr}#app>#result-screen.completion-card,#app #mental-run-screen #mental-run-summary.completion-card:not([hidden]){display:flex;flex:1;flex-direction:column;justify-content:flex-start;min-height:0;max-height:none;padding:var(--card-padding);gap:14px;overflow:hidden;box-sizing:border-box}#app>#result-screen.completion-card{width:min(940px,calc(100% - 24px));margin:0 auto 12px}#app .completion-card>.completion-content{flex:1;min-height:0;overflow:auto}#app .completion-card>.completion-actions{flex:none;margin-top:auto;width:100%}#app .completion-card>.completion-actions button{min-height:var(--control-height);min-width:0}#app #result-screen[data-practice-result=true] #result-detail{justify-content:flex-start;align-items:stretch;gap:12px}#app #result-screen[data-practice-result=true] .practice-set-results{display:grid;flex:none;gap:8px;margin:0;width:100%;padding:0;list-style:none}#app .practice-outcome-row{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:8px 12px;flex:none;width:100%;padding:14px;border:1px solid var(--line);border-radius:12px;background:var(--surface-soft);box-sizing:border-box;text-align:left}#app .practice-outcome-row.correct{border-color:#a3cdb3;background:#f0f8f2;color:var(--ink)}#app .practice-outcome-row.review{border-color:#d8bc80;background:#fff9ed;color:var(--ink)}#app .practice-outcome-row .practice-equation{margin:0;font-size:20px;line-height:1.35;overflow-wrap:anywhere;text-align:left}#app .practice-outcome-row .practice-answer-status{font-size:15px;font-weight:600;line-height:1.3;text-align:center;max-width:90px;color:#79520c}#app .practice-outcome-row.correct .practice-answer-status{color:#246043}#app .practice-outcome-row .practice-working-status{grid-column:1/-1;margin:0;font-size:15px;line-height:1.35;color:var(--text-soft);text-align:left}#app #result-screen[data-practice-result=true]>.completion-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}#app #result-screen[data-practice-result=true]>.completion-actions>button:not([hidden]){display:block;margin:0;min-height:44px;width:100%;min-width:0;max-width:none;grid-row:auto;grid-column:auto}#app #result-screen[data-practice-result=true][data-practice-summary=false]>.completion-actions>#result-next{grid-column:1/-1}#app #result-screen[data-practice-result=true][data-practice-summary=true]>.completion-actions{grid-template-columns:repeat(2,minmax(0,1fr));align-items:stretch}#app #result-screen[data-practice-result=true][data-practice-summary=true]>.completion-actions>#practice-set-retry{grid-column:1;grid-row:1}#app #result-screen[data-practice-result=true][data-practice-summary=true]>.completion-actions>#result-next{grid-column:2;grid-row:1}#app #result-screen[data-practice-summary=true]>.completion-actions>button{height:100%;box-sizing:border-box}#app #mental-run-summary:not(.assessment-card) #mental-run-summary-list{display:grid;grid-auto-rows:max-content;align-content:start;gap:8px}#app #lesson-screen #practice-footer.practice-footer,#app #mental-run-screen[data-kind=practice] #mental-run-navigation.practice-footer{display:grid;grid-template-columns:var(--practice-columns,minmax(0,1fr) minmax(0,1fr));flex:none;min-height:var(--control-height);padding:0;margin:0;gap:var(--control-gap)}#app #mental-run-screen[data-kind=practice] #mental-run-navigation.practice-footer{--practice-columns:repeat(3,minmax(0,1fr))}#app #lesson-screen[data-stage=Assessment] #assessment-footer :is(#assessment-previous,#assessment-next),#app #mental-run-screen[data-kind=test] #mental-run-navigation :is(#mental-run-previous,#mental-run-next){width:var(--test-button-width,76px);min-width:var(--test-button-width,76px);max-width:var(--test-button-width,76px);height:44px;min-height:44px;max-height:44px;box-sizing:border-box;padding:6px 10px}#app :is(#mental-run-previous,#assessment-previous){border:1px solid var(--line);border-radius:12px;background:var(--surface-selected,var(--tone-e4efff));min-height:44px;font-size:15px;padding:6px 10px}#app .practice-footer button{min-height:var(--control-height)}#app #lesson-screen[data-compact-practice=true] #practice-toolbar{display:flex;gap:var(--control-gap);margin:0}#app #lesson-screen[data-compact-practice=true] #practice-toolbar>#ink-tools{display:flex;min-width:0;max-width:360px;order:0}#app #lesson-screen #practice-footer{width:100%}#app #lesson-screen[data-compact-practice=true] #practice-toolbar>.lesson-guide:not(:has(#activity-dialog:not([hidden]))):not(:has(#recognition-dialog:not([hidden]))){display:none!important}#app #lesson-screen #practice-footer>#lesson-actions{display:contents}#app #lesson-screen #practice-footer :is(#context-hint,#main-action){width:100%!important;min-width:0!important;max-width:none;margin:0}#app #mental-run-screen[data-kind=practice][data-phase=question]>.mental-run-toolbar{display:grid;grid-template-columns:minmax(0,1fr);gap:var(--control-gap)}#app #mental-run-screen[data-kind=practice] .mental-run-toolbar>#mental-note-tools{grid-column:1;grid-row:1;width:100%;min-width:0}#app #mental-run-screen[data-kind=practice] .mental-run-toolbar>#mental-run-navigation{grid-column:1;grid-row:2;width:100%}#app #mental-run-screen[data-kind=practice][data-input-mode=Type] .mental-run-toolbar>#mental-run-navigation{grid-row:1}#app #lesson-screen #supported-action-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--control-gap);width:100%;flex:none;grid-column:1/-1;grid-row:1;min-height:44px}#app #lesson-screen #supported-action-row :is(#support-tools,#lesson-actions){display:contents!important}#app #lesson-screen #supported-action-row :is(#context-hint,#main-action){width:100%;min-width:0;min-height:44px;margin:0;grid-column:auto;grid-row:auto}#app #lesson-screen #supported-action-row:not(:has(#context-hint:not([hidden]))) #main-action{grid-column:1/-1}#app #mental-screen{width:calc(100% - 24px);max-width:none;margin:0 12px;padding-inline:0}#app #mental-screen .mental-heading{display:none}#app #mental-screen .page-title{display:block;margin:0;flex:none}#app #mental-screen #mental-title{font-weight:600}#app #mental-screen[data-phase] #mental-paper{flex:1 1 0;min-height:0}#app #mental-screen[data-phase=example] #mental-paper{justify-content:flex-start;gap:8px;padding:var(--card-padding)}#app #mental-screen[data-phase=example] #mental-caption{margin:0}#app #result-screen[data-inverse-result=true]{flex:0 1 auto;height:auto;min-height:0;max-height:calc(var(--app-height,100dvh) - 64px);margin:8px auto 12px;padding:var(--card-padding);gap:var(--content-gap)}#app #result-screen[data-inverse-result=true] #result-title{display:none}#app #result-screen[data-inverse-result=true] #result-detail{flex:0 1 auto;gap:var(--content-gap)}#app #result-screen[data-inverse-result=true]>.completion-actions{margin:0}#app #result-screen[data-inverse-result=true] .practice-answer-status{white-space:nowrap;max-width:none}#app #lesson-screen .paper-frame{box-shadow:none}#app #lesson-screen[data-check-lesson=true] #completed-equation{font-family:"Trebuchet MS","Segoe UI",sans-serif;font-size:calc(var(--reference-question-unit)*.72);font-weight:600;font-variant-numeric:tabular-nums;line-height:1}#app #lesson-screen .paper-frame::after{content:"";position:absolute;inset:0;border:1px solid var(--line);border-radius:inherit;pointer-events:none;z-index:30;box-sizing:border-box}#app #lesson-screen:is([data-stage=Assessment],[data-stage=Follow],[data-stage=Together],[data-with-check=true]:not([data-check-lesson=true])) .method-board{position:relative;border-color:transparent;border-radius:18px}#app #lesson-screen:is([data-stage=Assessment],[data-stage=Follow],[data-stage=Together],[data-with-check=true]:not([data-check-lesson=true])) .method-board::after{content:"";position:absolute;inset:0;border:1px solid var(--line);border-radius:17px;pointer-events:none;z-index:31;box-sizing:border-box}#app #lesson-screen:is([data-stage=Assessment],[data-stage=Follow],[data-stage=Together],[data-with-check=true]:not([data-check-lesson=true])) .paper-frame::after{content:none}#app .backup-actions{display:flex;flex-wrap:wrap;gap:var(--control-gap)}#app .backup-actions button{flex:1;min-height:44px}#app #backup-status:empty,#restore-backup-error:empty{display:none}dialog{box-sizing:border-box;max-width:calc(100% - 24px);max-height:calc(var(--app-height,100dvh) - 24px);overscroll-behavior:contain}dialog .actions{gap:10px}dialog .actions>button{min-height:var(--control-height)}#answer-editor{background:var(--background,var(--tone-f2f6fc))}#answer-editor h2{font-size:22px;line-height:1.2}#answer-editor-question{font-size:20px;line-height:1.3;color:var(--ink);font-weight:600}#answer-editor-feedback{font-size:17px;line-height:1.3;color:var(--ink)}#answer-editor #answer-editor-tools{display:flex}#answer-editor-tools button{flex:1;min-width:0;min-height:44px;padding:6px;background:white;border:1px solid var(--line);border-radius:12px;font-size:15px}#answer-editor-tools button[aria-pressed=true]{background:var(--surface-selected,var(--tone-e4efff));border-color:var(--brand)}#answer-editor-paper{background:white;border:2px solid var(--tone-9fb9db);border-radius:14px;overflow:hidden}#answer-editor-ink{position:absolute;inset:0;width:100%;height:100%;touch-action:none;user-select:none;-webkit-user-select:none;cursor:crosshair}#answer-editor-value{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;pointer-events:none;font-size:clamp(40px,10vw,64px);font-weight:600}#answer-editor-ink path{stroke-linecap:round;stroke-linejoin:round}.left-handed #answer-editor-tools{flex-direction:row-reverse}#answer-editor[open]{display:grid;grid-template-rows:auto minmax(0,1fr) 44px;width:min(620px,calc(100% - 24px));height:min(580px,calc(var(--app-height,100dvh) - 24px));padding:18px;gap:var(--panel-gap);overflow:hidden}#answer-editor .answer-editor-heading{display:flex;flex-direction:column;gap:8px;min-width:0}#answer-editor .answer-editor-heading :is(h2,p){margin:0}#answer-editor .answer-editor-entry{display:flex;flex-direction:column;min-height:0;gap:var(--panel-gap)}#answer-editor #answer-editor-tools{flex:none;gap:var(--control-gap);margin:0;min-height:44px}#answer-editor .actions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--control-gap);margin:0}#answer-editor .actions button{min-width:0;min-height:44px;height:44px;width:100%;margin:0;padding:4px;font-size:16px;line-height:1.1}#answer-editor #answer-editor-paper{position:relative;flex:1 1 0;min-height:0;height:auto;width:100%;max-width:100%;aspect-ratio:auto;margin:0;box-sizing:border-box}#answer-correction{position:absolute;inset:0;display:flex;flex-direction:column;gap:8px;background:white;padding:8px;border-radius:inherit;overflow:auto}#answer-correction-value{display:block;flex:none;box-sizing:border-box;width:100%;height:56px;min-height:56px;margin:0;padding:0 4px;border:0;border-radius:0;background:white;color:var(--ink);font-family:inherit;font-size:clamp(32px,6vw,44px);font-weight:600;text-align:center;line-height:1.1;border-bottom:1px solid var(--line)}#answer-correction-keys{flex:1;min-height:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-template-rows:repeat(4,minmax(0,1fr));gap:4px}#answer-correction-keys button{font-size:18px;padding:2px;border-radius:8px}#answer-correction-keys button:last-child{grid-column:span 2}#answer-editor[data-correcting=true] #answer-editor-tools{display:none}#answer-correction-keys button{min-height:44px;background:var(--surface-soft);color:var(--ink)}}@media screen and (min-width:900px) and (min-height:650px){#app #lesson-screen[data-stage=Watch] #caption{font-size:clamp(28px,min(2.8vw,5.8vh),96px)}#app #lesson-screen[data-stage=Watch] #remember-text{font-size:clamp(20px,min(2vw,4.2vh),68px)}}@media screen and (min-width:651px) and (max-width:900px){#app>header #lesson-journey{width:100%}#app>header #lesson-journey ol{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:4px}#app>header #lesson-journey button{font-size:13px;padding-inline:4px;width:100%}}@media screen and (max-width:650px){#app #lesson-screen #learning-toolbar{display:grid;grid-template-columns:minmax(0,1fr);gap:var(--control-gap);flex:none;width:100%}#app #lesson-screen:has(#learning-toolbar>#ink-tools)>#work-preferences{display:none!important}#app #lesson-screen #learning-toolbar:has(>#ink-tools){grid-template-columns:minmax(0,1fr) minmax(0,2fr)}#app #lesson-screen #learning-toolbar:has(#ink-tools[data-mode=Type]){grid-template-columns:repeat(2,minmax(0,1fr))}#app #lesson-screen #learning-toolbar :is(#ink-tools,#phone-workbook-tabs){width:100%;min-width:0;height:52px;min-height:52px;max-height:none;margin:0}#app #lesson-screen #learning-toolbar>#ink-tools button{height:100%;min-height:44px;max-height:none;font-size:14px;padding:4px}#app #lesson-screen #learning-toolbar:has(>#ink-tools) #phone-workbook-tabs button{padding:4px;font-size:14px}#app #lesson-screen[data-stage=Assessment]{--test-button-width:100%;--assessment-tools-display:grid;--assessment-tools-gap:8px;--assessment-tools-padding:0px}#app #lesson-screen[data-stage=Assessment] #assessment-toolbar:has(>#assessment-paper-tabs){grid-column:1/-1;grid-template-columns:minmax(0,1fr);grid-template-rows:52px;align-items:stretch;width:100%}#app #lesson-screen[data-stage=Assessment] #assessment-toolbar>#assessment-paper-tabs{grid-column:1;grid-row:1;width:100%;min-width:0;align-self:stretch}#app #lesson-screen[data-stage=Assessment] #assessment-toolbar>#assessment-paper-tabs button{font-size:14px;line-height:1.15;padding:4px;min-width:0}#app #lesson-screen[data-stage=Assessment] #assessment-footer{--assessment-footer-columns:3;--assessment-tool-columns:1;grid-template-columns:repeat(var(--assessment-footer-columns),minmax(0,1fr));gap:8px}#app #lesson-screen[data-stage=Assessment][data-input-mode=Type] #assessment-footer{--assessment-footer-columns:4;--assessment-tool-columns:2}#app #lesson-screen[data-stage=Assessment] #assessment-footer>#ink-tools{grid-column:1 / span var(--assessment-tool-columns);grid-row:1;display:grid!important;grid-template-columns:repeat(var(--assessment-tool-columns),minmax(0,1fr));width:100%;min-width:0;gap:8px;margin:0}#app #lesson-screen[data-stage=Assessment] #assessment-footer button{height:44px;min-height:44px;max-height:44px;min-width:0;width:100%;padding:4px;font-size:14px}#app #lesson-screen[data-stage=Assessment] #assessment-footer :is(#assessment-previous,#assessment-next){grid-column:auto;grid-row:1;justify-self:stretch}#app #lesson-screen[data-stage=Assessment] #test-check-board>.workspace-title{flex:none;margin:0;padding:8px;font-size:20px;line-height:1.25;text-align:center}#app #lesson-screen[data-stage=Check] #checking-view{display:none!important}#app #lesson-screen #phone-workbook-tabs button{min-width:0}#app #lesson-screen[data-stage=Check] #phone-workbook-tabs button{padding-inline:4px;font-size:14px}#app #lesson-screen[data-compact-practice=true] #practice-toolbar{grid-template-columns:minmax(0,1fr) minmax(0,2fr);grid-template-rows:52px;gap:8px}#app #lesson-screen[data-compact-practice=true] #practice-toolbar:has(#ink-tools[data-mode=Type]){grid-template-columns:repeat(2,minmax(0,1fr))}#app #lesson-screen[data-compact-practice=true] :is(#practice-toolbar #ink-tools,#practice-footer) button{min-height:44px;height:44px;padding:4px;font-size:14px;line-height:1.1}#app #header-context[data-practice-progress=true] #mode-label{font-size:15px}#app>header{grid-template-columns:44px minmax(0,1fr) 44px}#app>header :is(#navigation-toggle,#tools){position:relative;width:44px}#app>header #navigation-toggle{justify-content:flex-start}#app>header #navigation-toggle>.header-icon{position:absolute;left:0;top:50%;transform:translateY(-50%)}#app>header #tools{justify-content:flex-start}#app>header #tools>.header-icon{position:absolute;right:0;top:50%;transform:translateY(-50%)}#app>header :is(#navigation-toggle,#tools)>span{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}#app #header-context[data-page-note=true]{font-size:13px;line-height:1.1}#app #header-context[data-page-note=true] #mode-label{font-size:13px}#app #header-note{font-size:12px;line-height:1.1}html[data-phone-book=true],html[data-phone-book=true] body{height:var(--app-height,100dvh)!important;overflow:hidden!important}html[data-phone-book=true] #app{height:var(--app-height,100dvh)!important;min-height:0!important;max-height:var(--app-height,100dvh)!important;overflow:hidden!important}html[data-phone-book=true] #app #lesson-screen{flex:1 1 0!important;min-height:0!important;height:auto!important;max-height:100%!important;overflow:hidden!important}html[data-phone-book=true] #app #lesson-screen .lesson-layout{flex:1 1 0!important;min-height:0!important;height:auto!important;max-height:100%!important;overflow:hidden!important}#app #lesson-screen[data-phone-view=workbook] .lesson-layout{display:flex!important;flex-direction:column;min-height:0!important;height:auto;overflow:hidden}#app #lesson-screen[data-phone-view=workbook] .lesson-guide{display:flex!important;flex-direction:column;flex:1 1 0!important;min-height:0!important;height:auto!important;max-height:none!important;width:100%;overflow:hidden}#app #lesson-screen[data-phone-view=workbook] #step-copy{flex:1 1 0!important;min-height:0!important;height:auto!important;max-height:none!important;overflow:auto!important} :root{--card-padding:16px}#app :is(#method-screen,#mental-setup-screen,#print-screen) .option-row .option-copy>span:first-child,#tools-dialog .settings-panel .option-row .option-copy>span:first-child{font-size:16px}#app :is(#method-screen,#mental-setup-screen,#print-screen) .option-row .option-description,#tools-dialog .settings-panel .option-row .option-description{font-size:15px}#app :is(#method-screen,#mental-setup-screen,#print-screen) .option-row,#tools-dialog .settings-panel .option-row{margin-bottom:8px;padding-bottom:8px;row-gap:6px}#app #header-context[data-long-test-title=true] #mode-label{font-size:14px;line-height:1.15}#app #header-context[data-long-page-title=true] #mode-label{font-size:13px;line-height:1.2}#app #keypad-dialog #digit-keys{grid-template-columns:repeat(5,minmax(0,1fr));gap:6px}#app #keypad-dialog.inline-keypad{padding:12px;gap:8px}#app #keypad-dialog #keypad{gap:8px}#app #mental-run-screen #mental-run-summary.completion-card:not([hidden]),#app>#result-screen.completion-card{gap:10px}#app :is(#check-screen,#result-screen,#mental-run-summary).assessment-card :is(#question-overview,#mental-run-summary-list),#app :is(#result-screen,#mental-run-summary).assessment-card .assessment-list{grid-template-columns:1fr}#app :is(#check-screen,#result-screen,#mental-run-summary).assessment-card :is(h1,h2){font-size:24px}#app :is(#lesson-screen,#mental-screen) .playback-footer{display:grid;flex:none;grid-template-columns:minmax(0,1fr) minmax(0,1fr);grid-template-rows:44px 44px;gap:4px var(--control-gap);padding:14px 10px 6px;border:1px solid var(--line);border-radius:var(--card-radius);background:white;box-sizing:border-box;margin:0;height:var(--playback-height);min-height:var(--playback-height)}#app :is(#lesson-screen,#mental-screen) .playback-footer :is(#lesson-actions,.actions,.playback-navigation){display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-column:1/-1;gap:var(--control-gap);margin:0;padding:0;width:100%;max-width:none;min-height:var(--control-height)}#app :is(#lesson-screen,#mental-screen) .playback-footer :is(#lesson-actions,.actions){grid-row:1}#app :is(#lesson-screen,#mental-screen) .playback-footer .playback-navigation{grid-row:2}#app :is(#lesson-screen,#mental-screen) .playback-footer :is(#lesson-actions,.actions,.playback-navigation)>button{flex:1;min-width:0;min-height:var(--control-height);height:var(--control-height);max-height:var(--control-height);padding:6px 10px;margin:0;font-size:16px;line-height:1.2;white-space:normal}#app :is(#lesson-screen,#mental-screen) .playback-footer .playback-navigation>button{font-size:14px;padding:6px}#app #lesson-screen #phone-playback-footer:not(:has(#teaching-navigation:not([hidden]))){grid-template-rows:44px;height:64px;min-height:64px}#app .playback-footer #workbook-write,#app .playback-footer:not([data-supported=true]) #support-tools{display:none}#app #lesson-screen #phone-playback-footer #supported-action-row :is(#support-tools,#lesson-actions){display:contents!important}#app #lesson-screen #phone-playback-footer[data-supported=true] #supported-action-row{grid-column:1/-1;grid-row:1;min-height:44px}#app #lesson-screen #phone-playback-footer[data-supported=true] #supported-action-row button{width:100%;min-width:0;max-width:none;height:44px;min-height:44px;max-height:44px;padding:6px 10px;font-size:16px;line-height:1.2}#app #lesson-screen #phone-playback-footer #context-hint{border:1px solid transparent;border-radius:18px;background:var(--surface-selected);color:var(--text);box-shadow:none}#app #lesson-screen[data-fixed-playback=true][data-phone-view=writing] .lesson-guide{display:none!important}}@media screen and (min-width:651px) and (max-width:1100px){#app #header-context[data-long-page-title=true] #mode-label{font-size:18px;line-height:1.1}#app #header-context[data-page-note=true]{font-size:18px;line-height:1.1}#app #header-context[data-page-note=true] #mode-label{font-size:18px}#app #header-context[data-page-note=true] #header-note{font-size:14px}}@media screen and (max-height:420px) and (min-width:520px) and (max-width:650px){#app #mental-screen[data-phase] .mental-lesson-layout{display:grid}#app #mental-screen[data-phase=example] #mental-model{min-height:0;max-height:none}#app #mental-screen[data-phase=example] #mental-title{margin-bottom:0}#app :is(#lesson-screen,#mental-screen) .playback-footer{grid-template-columns:repeat(4,minmax(0,1fr));grid-template-rows:44px;height:64px;min-height:64px}#app :is(#lesson-screen,#mental-screen) .playback-footer>:is(#lesson-actions,.actions){grid-column:1/3!important;grid-row:1!important}#app :is(#lesson-screen,#mental-screen) .playback-footer>.playback-navigation{grid-column:3/5!important;grid-row:1!important}#app #lesson-screen #phone-playback-footer[data-supported=true] #supported-action-row{grid-column:1/3;grid-row:1}#app #lesson-screen #phone-playback-footer:not(:has(#teaching-navigation:not([hidden]))){grid-template-columns:repeat(2,minmax(0,1fr))}#app #lesson-screen #phone-playback-footer:not(:has(#teaching-navigation:not([hidden]))) #supported-action-row{grid-column:1/-1}#app #lesson-screen[data-stage=Assessment] #assessment-toolbar{grid-column:1/-1!important}#app #lesson-screen:is([data-stage=Assessment],[data-compact-practice=true][data-practice-tabs=true]){display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-template-rows:auto minmax(0,1fr) auto;align-content:stretch}#app #lesson-screen:is([data-stage=Assessment],[data-compact-practice=true][data-practice-tabs=true]) :is(#assessment-toolbar,#practice-toolbar){grid-column:1;grid-row:1;align-self:stretch;min-width:0}#app #lesson-screen:is([data-stage=Assessment],[data-compact-practice=true][data-practice-tabs=true]) :is(#assessment-paper-tabs,#practice-paper-tabs){grid-column:2;grid-row:1;align-self:start}#app #lesson-screen:is([data-stage=Assessment],[data-compact-practice=true][data-practice-tabs=true]) .lesson-layout{grid-column:1/-1;grid-row:2;width:100%;height:100%!important}#app #lesson-screen:is([data-stage=Assessment],[data-compact-practice=true][data-practice-tabs=true]) :is(#assessment-footer,#practice-footer){grid-column:1/-1;grid-row:3}#app #lesson-screen:is([data-stage=Assessment],[data-compact-practice=true][data-practice-tabs=true]) #ink-tools{height:100%;align-items:stretch}#app #lesson-screen:is([data-stage=Assessment],[data-compact-practice=true][data-practice-tabs=true]) #ink-tools button{height:100%;max-height:none}#app #lesson-screen[data-compact-practice=true][data-practice-tabs=true]{display:flex;flex-direction:column}}@media screen and (max-height:420px){ :root{--card-padding:12px}#app #lesson-screen[data-phone-view=workbook] .lesson-guide{padding:12px;gap:8px}#app #mental-screen[data-phase]{min-height:0;overflow:hidden}#app #mental-screen[data-phase] #mental-paper{flex:1 1 0;min-height:0;justify-content:flex-start;overflow:auto}#app #check-screen.assessment-card,#app #result-screen.assessment-card,#app #mental-run-screen[data-kind=test] #mental-run-summary.assessment-card{gap:6px;padding:12px}#app :is(#check-screen,#result-screen,#mental-run-summary).assessment-card :is(h1,h2){font-size:22px}}@media screen and (max-height:420px) and (min-width:520px){#answer-editor[open]{grid-template-columns:minmax(0,1fr) 210px;grid-template-rows:auto minmax(0,1fr);gap:8px 12px;padding:12px}#answer-editor .answer-editor-heading{grid-column:1/-1;grid-row:1;flex-direction:row;align-items:center;justify-content:space-between;gap:8px;flex-wrap:wrap}#answer-editor .answer-editor-heading h2{font-size:18px}#answer-editor .answer-editor-heading #answer-editor-question{font-size:17px}#answer-editor .answer-editor-entry{display:contents}#answer-editor #answer-editor-paper{grid-column:1;grid-row:2;height:100%}#answer-editor #answer-editor-tools{grid-column:2;grid-row:2;align-self:start;display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}#answer-editor .actions{grid-column:2;grid-row:2;align-self:end}#answer-correction{padding:4px;gap:4px}#answer-correction-value{height:32px;min-height:32px;font-size:28px}}@media screen and (max-width:360px){#app #header-context[data-long-test-title=true] #mode-label{font-size:12px;line-height:1.15}}@media screen and (min-width:900px){#app #lesson-screen #practice-footer.practice-footer{--practice-columns:repeat(2,minmax(110px,180px));justify-content:end}#app #mental-run-screen[data-kind=practice][data-phase=question]>.mental-run-toolbar{grid-template-columns:minmax(0,2fr) minmax(0,1fr)}#app #mental-run-screen[data-kind=practice] .mental-run-toolbar>#mental-run-navigation{grid-column:2;grid-row:1}#app #mental-run-screen[data-kind=practice][data-input-mode=Type] .mental-run-toolbar>#mental-run-navigation{grid-column:1/-1}}@media screen and (min-width:651px){#app #result-screen[data-inverse-result=true]>.completion-actions{grid-template-columns:repeat(3,minmax(0,1fr))}#app #result-screen[data-inverse-result=true][data-practice-result=true]>.completion-actions>#result-next{grid-column:auto}}@media screen and (max-width:360px){#app>header{grid-template-columns:44px minmax(0,1fr) 44px;gap:4px}#app>header :is(#navigation-toggle,#tools){font-size:14px;gap:4px}#app #header-context[data-long-page-title=true] #mode-label{font-size:12px}}@media screen{#app #print-screen .option-row{margin:0;padding:0 0 8px;row-gap:5px}#app #print-screen .option-row .option-description{font-size:15px;line-height:1.35}}@media print{html,body,#app,#print-area{margin:0!important;padding:0!important;border:0!important;box-shadow:none!important}#print-area :is(.sats-page,.printed-lesson-guide,.print-answer-sheet){box-sizing:border-box;min-height:278mm!important}#print-area .sats-page{position:relative;display:block!important;height:auto!important;max-height:none!important;margin:0 auto!important;padding:0!important;break-before:page;page-break-before:always;break-after:auto!important;page-break-after:auto!important;break-inside:avoid;page-break-inside:avoid}#print-area :is(.printed-lesson-guide,.print-answer-sheet){width:191mm;margin-inline:auto}#print-area .sats-page:first-child{break-before:auto;page-break-before:auto}#print-area .sats-page>h1{height:auto!important;margin:0 0 3mm!important}#print-area .sats-question+.sats-question{margin-top:4mm!important}#print-area .sats-checklist-section{box-sizing:border-box;outline:.3mm solid #333;outline-offset:-.3mm}#print-area .sats-checklist-section+.sats-checklist-section{margin-top:4mm}#print-area .sats-checklist-section>h2{margin:0!important;padding:3mm;font-size:16pt!important;line-height:1.2}#print-area .sats-checklist-row{display:grid;grid-template-columns:10mm minmax(0,1fr) 12mm;border-top:1px solid #b7bbc0}#print-area .sats-checklist-number{padding-top:3mm;border-right:.3mm solid #333;color:var(--tone-0067a9);text-align:center;font-size:14pt;font-weight:700}#print-area .sats-checklist-copy{padding:3mm;border-right:.3mm solid #333;font-size:14pt;line-height:1.35}#print-area .sats-checklist-copy p{margin:1mm 0 0!important;font-size:inherit}#print-area .sats-checklist-tick{align-self:center;justify-self:center;box-sizing:border-box;width:5mm;height:5mm;border:.3mm solid #333}#print-area .print-answer-sheet{position:relative;break-before:page;page-break-before:always;break-inside:avoid;page-break-inside:avoid;padding-top:0}#print-area .print-answer-sheet:first-child{break-before:auto;page-break-before:auto}#print-area .print-answer-sheet p{line-height:1.5;margin:3mm 0}#print-area .test-answer-columns{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:6mm}#print-area .test-answer-columns>div:only-child{grid-column:1 / -1}#print-area .test-answer-sheet p{font:14pt/1.25 Arial,sans-serif;margin:0;min-height:11mm;display:block;break-inside:avoid}#print-area .print-rounding-phrase{display:inline-flex;align-items:center;gap:2mm}#print-area .sats-spaces h3{display:flex;align-items:center}}#app .exchange-reading-controls{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:end;gap:8px}#app .exchange-reading-controls label{display:grid;gap:6px;font-size:16px}#app .exchange-reading-controls input{box-sizing:border-box;width:100%;min-width:0;min-height:44px;border:1px solid var(--line);border-radius:14px;padding:8px 12px;font:inherit;color:var(--ink);background:white}#app .exchange-reading-controls button{min-height:44px}#missing-model-fields{position:absolute;inset:0;pointer-events:none;z-index:8}.missing-model-field{position:absolute;pointer-events:auto;background:transparent;color:var(--muted);border:1px dashed var(--line);border-radius:6px;padding:0;min-height:44px;font-size:1.1rem}.missing-model-field:disabled{visibility:hidden}.missing-model-field:focus-visible{outline:3px solid var(--brand,var(--tone-376b9e))}#paper>#missing-question-focus{position:absolute;inset:0 0 auto;width:100%;height:var(--cell);pointer-events:none;z-index:13;overflow:visible}#model-blank-key{min-width:44px}#missing-calculation-choices{position:absolute;z-index:8;display:flex;gap:var(--space);padding:8px;box-sizing:border-box;background:var(--surface);border-radius:var(--control-radius)}#missing-calculation-choices button{flex:1;min-width:0;min-height:44px}#missing-calculation-choices button[aria-pressed=true]{background:var(--brand);color:white;border-color:transparent}.model-options-group{display:flex;flex-direction:column;gap:var(--space);min-width:0}.model-options-group:has(>.option-row:not([hidden])~.option-row:not([hidden])){padding:8px;border:1px solid var(--line);border-radius:12px;background:var(--tone-f6f9ff)}.model-options-group:has(>.option-row:not([hidden])~.option-row:not([hidden]))>.option-row{margin:0!important;border-bottom:0!important;background:transparent!important}#scaling-reading-fields{position:absolute;inset:0;pointer-events:none;z-index:14}.scaling-reading-field{position:absolute;min-height:44px;padding:0;pointer-events:auto;border:1px solid var(--edge);border-radius:5px;background:transparent;color:var(--muted)}.scaling-reading-field:disabled{opacity:1;background:transparent;pointer-events:none}.scaling-underlined{text-decoration:underline;text-underline-offset:.18em;text-decoration-thickness:.065em}#app #lesson-screen .fraction-method-paper{background-position:0 var(--fraction-grid-offset,0)}#app #lesson-screen #paper.fraction-method-paper>#printed-question{z-index:15}#app #lesson-screen .question-content.fraction-method-question{display:flex;align-items:center;justify-content:center;gap:calc(var(--qcell)*.2);height:96px;width:max-content;max-width:calc(100% - 16px)}#app #lesson-screen .fraction-method-question .question-token{flex:none;font-size:calc(var(--qcell)*.78);height:auto}#app #lesson-screen .fraction-method-question .question-token.word{font-size:calc(var(--qcell)*.64)}#app #lesson-screen .fraction-method-question .question-token.fraction{display:flex;flex-direction:column;gap:0;min-width:44px}#app #lesson-screen .fraction-method-question .fraction-quantity{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:1px;min-width:44px;min-height:44px;padding:0 4px;background:transparent;color:var(--text);border:0;border-radius:5px;font:inherit;opacity:1;line-height:1;pointer-events:auto;touch-action:manipulation}#app #lesson-screen .fraction-method-question .question-token.fraction>.fraction-quantity:first-child{border-bottom:1px solid currentColor;border-radius:0}#app #lesson-screen .fraction-source-number{border:0;padding:0}#app #lesson-screen .fraction-use-tick{flex:none;width:17px;height:17px;overflow:visible}#app #lesson-screen .fraction-use-tick path{stroke:var(--exchange-ink,var(--tone-456f9c));stroke-width:2.3;fill:none}#app #lesson-screen .fraction-quantity-target{box-shadow:inset 0 0 0 2px var(--brand);background:var(--support-fill,var(--tone-e3efff))}#app #lesson-screen .fraction-method-question #answer-slot{width:clamp(66px,calc(var(--qcell)*3.2),180px);height:44px;min-height:44px}.inline-fraction{display:inline-flex;vertical-align:middle;flex-direction:column;align-items:center;justify-content:center;line-height:1.1;font-size:.7em;margin:0 .1em}.inline-fraction>span:first-child{border-bottom:1px solid currentColor;padding:0 .1em .05em}.inline-fraction>span:last-child{padding:.05em .1em 0}#app #lesson-screen .fraction-method-question .fraction-quantity.question-token{font-size:calc(var(--qcell)*.78);font-weight:600}.scaling-reading-field.method-reading-target{border:2px solid var(--brand);background:var(--support-fill,var(--tone-e3efff))}#app #lesson-screen #paper.triple-paper>#printed-question{z-index:15}#paper.triple-paper{background-position:0 var(--fraction-grid-offset)}#app #lesson-screen .question-content.worded-groups{display:block;width:100%;height:auto;padding-inline:10px}.worded-groups #question-text{display:flex;align-items:center;justify-content:center;gap:10px}.worded-groups .question-sentence{font-size:clamp(16px,4.5vw,36px);line-height:1.2;text-align:center}#app #lesson-screen .worded-groups #answer-slot{flex:none;width:clamp(66px,22vw,180px);height:min(64px,calc(var(--question-band-height) - 8px))}.question-content.triple-question{display:block!important;width:100%;height:auto;container-type:inline-size}.triple-question #question-text{display:flex;align-items:center;justify-content:center;gap:clamp(2px,1cqi,8px);width:100%;font-size:clamp(16px,5cqi,34px)}.triple-question #question-text>.question-token{flex:0 0 auto;font-size:inherit;line-height:1.2}.triple-question #question-text>.operation{min-width:0;width:clamp(16px,5cqi,34px);padding:0}.triple-question #answer-slot{--answer-width:clamp(66px,23cqi,180px);width:var(--answer-width)!important;flex:0 0 var(--answer-width);height:44px!important}.triple-question .triple-number{font-weight:700!important}#scaling-reading-fields .plain-method-value{background:transparent!important;border:0!important;box-shadow:none!important;min-width:44px;min-height:44px}#scaling-reading-fields .plain-method-value.method-reading-target{background:color-mix(in srgb,var(--surface-selected) 55%,transparent)!important}.triple-question .triple-number{position:relative;pointer-events:auto;min-width:44px;min-height:44px;padding:2px;border:0;border-radius:8px;background:transparent;color:var(--ink);font:inherit;line-height:1.2;white-space:nowrap}.triple-question .triple-number:disabled{opacity:1;color:var(--ink)}.triple-question .triple-selected{background:var(--surface-selected)}.triple-question .triple-number-target{box-shadow:inset 0 0 0 2px var(--brand);background:var(--surface-selected)}#triple-links{position:absolute;inset:0;width:100%;height:100%;z-index:16;overflow:visible;pointer-events:none}.triple-choice-line{fill:none;stroke:var(--ink);stroke-width:2.4;stroke-linecap:round}#mental-screen{position:relative}#mental-triple-links{position:absolute;inset:0;width:100%;height:100%;z-index:3;overflow:visible;pointer-events:none}#app #lesson-screen #paper.triple-paper .triple-number{pointer-events:auto}.question-content.same-denominator-question{display:block!important;width:100%;height:auto}.same-denominator-question #question-text{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;font-size:34px}.same-denominator-question #question-text>.question-token{flex:0 0 auto;line-height:1.1;font-size:inherit}.same-denominator-question .question-token.fraction{display:flex;flex-direction:column;align-items:center;min-width:44px;gap:0}.same-denominator-question .question-token.fraction>span:first-child{width:100%;text-align:center;border-bottom:2px solid var(--ink);padding:0 3px 3px}.same-denominator-question .same-denominator-quantity{position:relative;min-width:44px;min-height:44px;background:transparent;border:0;border-radius:6px;padding:2px;font:inherit;line-height:1;color:var(--ink)}#app #lesson-screen .same-denominator-question .same-denominator-quantity{pointer-events:auto}.same-denominator-question .same-denominator-quantity:disabled{opacity:1;color:var(--ink)}.same-denominator-question .same-denominator-quantity.fraction-quantity-target{background:var(--surface-selected);box-shadow:inset 0 0 0 2px var(--brand)}.same-denominator-question #answer-slot{width:clamp(80px,26vw,180px)!important;height:80px!important;flex:0 0 clamp(80px,26vw,180px)}.same-denominator-question .operation{width:34px;min-width:34px;padding:0}.same-denominator-question .fraction-use-tick{position:absolute;right:-6px;bottom:-2px;width:20px;height:20px;pointer-events:none}#same-denominator-review{position:absolute;inset:0 0 auto;width:100%;height:var(--question-band-height,var(--cell));pointer-events:none;z-index:16}.same-denominator-reference #completed-equation{min-height:96px;display:flex;align-items:center;justify-content:center;gap:8px}.same-denominator-reference .inline-fraction{position:relative;flex:none;margin:0 .12em}.completed-denominator-tick{position:absolute;right:-12px;bottom:-4px;font-size:16px;color:var(--ink)}@media(max-width:650px){.same-denominator-question #question-text{font-size:clamp(23px,6.2vw,28px);gap:5px}.same-denominator-question .operation{width:28px;min-width:28px}.same-denominator-question #answer-slot{flex-basis:clamp(76px,25vw,108px);width:clamp(76px,25vw,108px)!important}}.same-denominator-question #answer-display.fraction{font-size:26px;line-height:1.1}#print-area .same-denominator-print .print-fraction{font-size:20px!important;line-height:1!important}.extra-method-mark{position:absolute;z-index:15;background:transparent;border:0;border-radius:12px;min-width:44px;min-height:44px;padding:0;pointer-events:auto}.extra-method-mark.extra-mark-target{background:var(--tone-e2efff66);outline:2px solid var(--edge)}html[data-input-method=keyboard] .extra-method-mark:focus{outline:3px solid #d99b20}html:not([data-input-method=keyboard]) #lesson-screen[data-mode=Write] .extra-method-mark{pointer-events:none}.round-precision-marked,.balance-known-marked{text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:5px}#balance-header-marks{position:absolute;inset:0;width:100%;height:100%;z-index:14;pointer-events:none}#extra-method-controls{position:absolute;inset:0;pointer-events:none;z-index:15}#extra-method-controls .extra-method-mark{pointer-events:auto}#extra-method-controls .extra-method-mark:disabled{pointer-events:none}#extra-method-controls[data-input-mode=Write] .extra-method-mark{pointer-events:none}.lesson-guide{container-type:inline-size}@container (min-width:440px){#app #lesson-screen #teaching-copy-content:has(#partition:not([hidden])){display:grid;grid-template-columns:minmax(0,1fr) minmax(160px,.6fr);gap:14px 18px;align-items:center}#app #lesson-screen #teaching-copy-content:has(#partition:not([hidden]))>:is(#remember,#activity-dialog,#recognition-dialog){grid-column:1/-1}#app #lesson-screen #teaching-copy-content:has(#partition:not([hidden]))>#caption{grid-column:1;text-align:left;margin:0}#app #lesson-screen #teaching-copy-content:has(#partition:not([hidden]))>#partition{grid-column:2;width:100%;max-width:230px;justify-self:center;margin:0}}#app #lesson-screen #step-copy{scrollbar-gutter:stable}@media screen{#app #print-screen .print-options>.model-options-group{display:contents}#app #print-screen .print-options>.model-options-group:has(>.option-row:not([hidden])~.option-row:not([hidden])){display:grid;grid-column:1/-1;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px;padding:6px}#app #print-screen .print-options .option-row{grid-column:auto;grid-row:auto;position:relative}#app #print-screen[data-print-details] .print-selection label>span{position:static;width:auto;height:auto;overflow:visible;clip-path:none}#app #print-screen[data-print-details] .print-selection label{display:flex;flex-direction:row;gap:8px}#app #print-screen[data-print-details] .print-switch .option-copy>span:first-child{font-size:16px;line-height:1.25}#app #print-screen[data-print-details] .print-switch .option-copy>span:first-child::after{content:none}}@media screen and (max-width:650px){#app #print-screen .print-options>.model-options-group:has(>.option-row:not([hidden])~.option-row:not([hidden])){grid-template-columns:1fr;padding:4px}}@media screen and (max-height:760px){#app #print-screen .print-switch.option-row{padding:6px 42px 6px 8px;min-height:44px;gap:8px;border:0;margin:0}#app #print-screen .print-switch .option-description{display:none}#app #print-screen .print-switch .option-copy>span:first-child{font-size:16px;line-height:1.2}#app #print-screen .print-selection select{min-height:40px;font-size:16px}#app #print-screen .print-selection label{gap:3px;font-size:14px}#app #print-screen .print-choices button{min-height:40px;font-size:16px;padding:7px}#app #print-screen #print-method-note{font-size:12px;line-height:1.3;margin:0}#app #print-screen .print-footer{padding-top:0}}@media screen and (max-height:420px) and (min-width:520px){#app #print-screen .print-options>.model-options-group:has(>.option-row:not([hidden])~.option-row:not([hidden])){grid-template-columns:repeat(2,minmax(0,1fr));padding:3px}#app #print-screen .print-switch .option-copy>span:first-child{line-height:1.15}#app #print-screen .print-selection label{align-items:center;gap:6px}#app #print-screen .print-switch.option-row{padding-top:4px;padding-bottom:4px}}@media screen and (max-height:760px){#app #print-screen .print-switch .option-copy>span:first-child{padding:0;min-width:0}}@media screen and (max-height:420px) and (min-width:520px){#app #print-screen #print-content{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr)}#app #print-screen .print-selection label{font-size:12px}#app #print-screen .print-selection select{font-size:13px;min-height:40px}#app #print-screen .print-switch.option-row{padding-right:36px}#app #print-screen .print-switch .option-copy>span:first-child{font-size:0}#app #print-screen .print-switch .option-copy>span:first-child::after{content:attr(data-short-title)}}@media screen and (max-width:650px){#app #print-screen .print-selection:has(#print-method-field[hidden]) #print-sheet-field{grid-column:1/-1}}@media screen and (max-height:650px){#app #print-screen .print-choices{padding:1px}#app #print-screen .print-selection label>span{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}#app #print-screen .print-switch .option-copy>span:first-child{font-size:0}#app #print-screen .print-switch .option-copy>span:first-child::after{content:attr(data-short-title);font-size:15px;line-height:1.2}}@media screen and (max-height:420px) and (min-width:520px){#app #print-screen .print-switch .option-copy>span:first-child::after{font-size:13px;line-height:1.15}#app #print-screen .print-selection label{grid-template-columns:minmax(0,1fr)}#app #print-screen .print-selection select{width:100%}#app #print-screen .print-choices{grid-column:1;grid-row:1}#app #print-screen .print-selection{grid-column:2;grid-row:1}#app #print-screen .print-selection label{display:block}#app #print-screen .print-options{grid-column:1/-1;grid-row:2}#app #print-screen #print-method-note{grid-column:1/-1;grid-row:3}}@media screen{#app #mental-screen .mental-lesson-layout{display:grid;grid-template-columns:minmax(0,2fr) minmax(280px,1fr);gap:12px;flex:1;min-height:0}#app #mental-screen #mental-paper{display:flex;flex-direction:column;flex:1;min-height:0;max-height:none;padding:20px;overflow:hidden;position:relative}#app #mental-screen #mental-title{flex:none;margin:0;font-size:clamp(24px,3vw,52px);line-height:1.25;color:var(--ink)}#app #mental-screen #mental-model{flex:1;min-height:0;height:100%;width:100%;max-height:none;max-width:100%;margin:0}#app #mental-screen #mental-purpose{display:none}#app #mental-screen .mental-lesson-guide{display:flex;flex-direction:column;min-height:0;background:white;border:1px solid var(--line);border-radius:var(--card-radius);padding:20px;gap:12px}#app #mental-screen #mental-copy{display:flex;flex:1;min-height:0;overflow:auto;align-items:safe center;justify-content:center}#app #mental-screen #mental-caption{width:100%;max-width:760px;margin:0;font-size:clamp(22px,2.2vw,32px);line-height:1.35;text-align:center}#app #mental-screen .mental-controls{flex:none;display:flex;flex-direction:column;gap:8px;width:100%;min-height:0;height:auto}#app #mental-screen .mental-controls .actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin:0}#app #mental-screen .mental-controls button{min-width:0;min-height:44px;margin:0}#app #mental-learn-tabs{display:none}#app #mental-run-summary .completion-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;align-items:stretch}#app #mental-run-summary .completion-actions>button{height:100%;box-sizing:border-box}#app .model-drawing-target{pointer-events:none;opacity:.75}}@media screen and (max-width:650px){#app #mental-learn-tabs{display:flex;flex:none}#app #mental-screen .mental-lesson-layout{position:relative;display:flex;flex-direction:column;gap:8px}#app #mental-screen .mental-lesson-guide{display:contents}#app #mental-screen #mental-copy{flex:1;min-height:0;padding:20px;background:white;border:1px solid var(--line);border-radius:var(--card-radius);box-sizing:border-box}#app #mental-screen[data-phone-view=explanation] #mental-paper{position:absolute;inset:0;visibility:hidden;opacity:0;pointer-events:none}#app #mental-screen[data-phone-view=workbook] #mental-copy{display:none}#app #mental-screen .mental-controls{padding:12px;box-sizing:border-box;border:1px solid var(--line);border-radius:var(--card-radius);background:white}#app #mental-screen #mental-paper{min-height:0;flex:1;padding:14px}#app #mental-screen #mental-title{font-size:26px}#app #mental-screen #mental-caption{font-size:22px}}@media screen and (min-width:651px) and (orientation:portrait){#app #mental-screen .mental-lesson-layout{grid-template-columns:1fr;grid-template-rows:minmax(0,1fr) minmax(170px,24%)}}@media screen{#app :is(#caption,#remember-text,#mental-caption) .active-phrase{font-weight:inherit;line-height:inherit}#app :is(#step-copy,#mental-copy){scrollbar-gutter:stable;overscroll-behavior:contain}#app #remember:not([hidden]){margin-bottom:18px!important}#app :is(.review-ring,.exchange-check-ring,.column-check-ring,.missing-position-ring,.missing-calculation-ring,.triple-check-ring){fill:rgba(232,146,43,.2)!important;stroke:none!important;pointer-events:none}#app :is(.column-check-ring,.exchange-check-ring){stroke:#cb7b1b!important;stroke-width:1.5px;vector-effect:non-scaling-stroke;stroke-linejoin:miter}#app .recognition-target{animation:recognition-pulse 1.1s ease-in-out infinite;fill:#ffdb98;stroke:#b66d12}#app .option-disabled{opacity:.5}#app :is(.option-row,.setting-row) input[role=switch]{flex:0 0 52px!important;width:52px!important;height:30px!important;min-width:52px!important;min-height:30px!important;max-width:52px!important;max-height:30px!important}#app .unknown-rectangle{display:inline-block;width:3em;height:1.2em;border:1px solid var(--tone-9fb9db);vertical-align:middle}#app #year-identity{text-align:center}#app #year-identity img{width:112px;height:112px;object-fit:contain}#app #year-identity h1{font-size:34px}#app #year-screen{overflow:auto}#phone-hint-dialog .hint-footer{display:flex;gap:10px;align-items:stretch}#phone-hint-dialog .hint-footer button{flex:1;min-width:0;width:auto;font-size:16px;min-height:46px;padding:10px}#section-intro-dialog{border:1px solid var(--line)}#section-intro-dialog p{font-size:20px;line-height:1.45}#section-intro-dialog .option-row{margin:18px 0}#answer-editor::backdrop{background:var(--tone-1d314c1f)}#print-screen .option-disabled input{cursor:default}}@keyframes recognition-pulse{50%{fill:#ffbd55;stroke-width:4}}@media screen and (min-width:900px){#answer-editor[open]{position:fixed;left:auto;right:16px;top:80px;bottom:16px;margin:0;width:min(46vw,620px);height:auto;max-height:calc(100dvh - 96px)}html[data-answer-editor=open] #lesson-screen .lesson-layout{width:calc(100% - min(48vw,648px))!important;grid-template-columns:minmax(0,1fr)!important}html[data-answer-editor=open] #lesson-screen .lesson-guide{visibility:hidden}#app #print-screen .print-settings{padding-inline:12px}}@media (prefers-reduced-motion:reduce){#app .recognition-target{animation:none;stroke-width:4}}@media screen{#app #assessment-toolbar{display:var(--assessment-tools-display,flex)!important;gap:var(--assessment-tools-gap,12px)!important;align-items:center!important;padding-inline:var(--assessment-tools-padding,8px)}#app #assessment-toolbar[hidden]{display:none!important}#app #assessment-toolbar #assessment-actions{display:flex!important;gap:8px;margin:0 0 0 auto;flex:none}#app #assessment-toolbar #assessment-actions[hidden]{display:none!important}#app #assessment-check-status,#app #mental-run-checked-status{display:none!important}#app #assessment-split-option{margin:0;padding:4px 8px;flex:none;max-width:260px}#app #assessment-split-option .option-copy{font-size:16px}#app #lesson-screen[data-stage=Assessment] .lesson-layout{display:grid!important;grid-template-columns:minmax(0,1fr)!important}#app #lesson-screen[data-stage=Assessment][data-assessment-split=true] .lesson-layout{grid-template-columns:repeat(2,minmax(0,1fr))!important}#app #lesson-screen[data-stage=Assessment] .lesson-guide{display:none!important}#app #lesson-screen[data-stage=Assessment] #test-check-board[hidden]{display:none!important}#app #lesson-screen[data-stage=Assessment][data-assessment-split=true] #test-check-board{display:flex!important}#app #mental-run-screen[data-kind=test] .mental-run-toolbar{display:flex;align-items:center;gap:12px}#app #mental-run-screen[data-kind=test] #mental-run-navigation{margin-left:auto;display:var(--test-navigation-display,flex);grid-template-columns:repeat(2,minmax(0,1fr));width:var(--test-navigation-width,auto);gap:8px}#app #mental-run-screen[data-kind=test] .mental-answer-line{font-size:var(--mental-question-font,32px)!important}#app #mental-run-screen[data-kind=test] #mental-answer-field{width:220px;min-height:96px;height:96px}#app #mental-run-screen[data-kind=test] #mental-run-answer{font-size:48px}#app #mental-run-screen[data-kind=test] #mental-run-answer[data-long-value=true]{font-size:clamp(26px,4.2vw,38px)}#app #mental-run-question-panel[data-result-first=true] #mental-answer-field{order:-1}#app #mental-run-screen[data-kind=test][data-phase=question] #mental-run-workspace{flex:1 1 0;min-height:0}#app #mental-run-workspace[data-type-test=true]{min-height:0;min-width:0;display:grid!important;grid-template-columns:minmax(0,1fr) minmax(230px,.5fr);gap:12px}#app #mental-test-keypad{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-template-rows:repeat(4,minmax(44px,1fr));gap:8px}#app #mental-test-keypad[hidden]{display:none!important}#app #mental-test-keypad button{font-size:26px}#app #mental-test-keypad [data-clear]{font-size:16px}#app #mental-test-keypad [data-delete]{display:grid;place-items:center}#app #mental-test-keypad [data-delete] svg{width:24px;height:24px}#app #mental-test-keypad[data-decimals=true]{grid-template-rows:repeat(5,minmax(40px,1fr))}#app #mental-test-keypad[data-decimals=true] [data-clear]{grid-row:5;grid-column:1/-1;font-size:16px}#app #mental-test-keypad[data-decimals=true] [data-mental-symbol]{grid-row:4;grid-column:1}#app #mental-test-keypad[data-mixed=true] [data-clear]{grid-column:1}#app #mental-test-keypad[data-mixed=true] [data-mixed-space]{grid-row:5;grid-column:2/-1;font-size:16px}#app #test-overview-content{display:grid!important;grid-template-columns:minmax(0,2fr) minmax(260px,1fr);gap:16px;flex:1;min-height:0}#app #test-overview .test-history-card{min-height:0;height:100%;width:100%}#app #test-focus{background:white;border:1px solid var(--line);border-radius:18px;padding:20px;overflow:auto}#app #test-overview-footer{display:flex;gap:12px}#app #test-overview-footer button{flex:1}#saved-test-dialog{overflow:auto}#saved-test-answers{margin-block:16px}#saved-test-answers .assessment-answer-row{border:1px solid var(--line);border-radius:12px;padding:12px}.score-practice-links{margin-top:12px}#app #extra-method-controls[data-input-mode=Write],#app #extra-method-controls[data-input-mode=Write] button{pointer-events:none}}@media screen and (max-height:420px) and (min-width:520px){#app #mental-run-screen[data-kind=test]{padding-bottom:0;--mental-key-columns:minmax(0,1fr) minmax(210px,.6fr);--mental-key-rows:minmax(0,1fr)}#app #mental-run-workspace[data-type-test=true]{grid-template-columns:minmax(0,1fr) minmax(210px,.6fr);grid-template-rows:minmax(0,1fr)!important}#app #mental-test-keypad{gap:6px;grid-template-rows:repeat(4,minmax(36px,1fr))}#app #mental-test-keypad[data-decimals=true]{grid-template-rows:repeat(5,minmax(36px,1fr))}#app #mental-test-keypad button{min-height:36px;padding:4px}#app #mental-run-screen[data-kind=test] #mental-run-question-panel{padding:6px}}@media screen and (max-width:800px){#app #mental-run-screen #mental-run-question-panel[data-long-prompt=true] .mental-answer-line{flex-direction:column;gap:8px;padding:12px 8px}#app #mental-run-question-panel[data-long-prompt=true] #mental-run-question{white-space:normal;max-width:100%;text-align:center}#app #test-overview-content{grid-template-columns:minmax(0,1fr)}#app #assessment-toolbar{flex-wrap:wrap;gap:6px!important}#app #assessment-split-option{max-width:190px}#app #assessment-split-option .option-copy{font-size:13px}#app #mental-run-workspace[data-type-test=true]{grid-template-columns:var(--mental-key-columns,minmax(0,1fr));grid-template-rows:var(--mental-key-rows,minmax(130px,1fr) minmax(190px,.8fr))}#app #mental-run-workspace[data-type-test=true][data-decimals=true]{grid-template-rows:var(--mental-key-rows,minmax(120px,1fr) minmax(232px,.8fr))}#app #mental-run-screen[data-kind=test] #mental-answer-field{width:140px;height:72px;min-height:72px}#app #mental-run-screen[data-kind=test] .mental-answer-line{font-size:var(--mental-question-font,30px)!important}}@media screen{#app[data-screen=years]>header{display:none!important}#app[data-screen=years] #year-screen{max-height:none;flex:1;display:flex;flex-direction:column;justify-content:center}#app[data-screen=years] #year-identity img{width:128px;height:128px} :is(#app,dialog) :is(.option-row,.setting-row) input[role=switch]{flex:0 0 52px!important;width:52px!important;height:30px!important;min-width:52px!important;min-height:30px!important;max-width:52px!important;max-height:30px!important}#app #print-sheet-label:empty{display:none}#app #test-overview,#app #test-overview-content{max-width:none}#app #completed-equation .inline-fraction{font-size:1em}#app #lesson-screen[data-stage=Check] #printed-question .question-token.fraction{font-size:calc(var(--qcell)*.78)}#app #assessment-split-option{border:0;background:var(--surface-soft);border-radius:12px}#app #mental-run-screen[data-kind=test] #mental-run-question-panel{padding:18px}#app #mental-run-screen[data-kind=test] #mental-run-question{font-size:inherit}}@media screen and (max-width:650px){#app #mental-run-screen[data-kind=test]{--test-button-width:100%;--test-navigation-display:grid;--test-navigation-width:100%}#app #mental-run-screen[data-kind=test]>.mental-run-toolbar{display:none}#app #mental-run-screen[data-kind=test] #mental-run-navigation :is(#mental-run-previous,#mental-run-next){grid-column:auto;grid-row:1}#app #mental-run-screen[data-kind=test][data-input-mode=Write] #mental-run-navigation{grid-template-columns:repeat(3,minmax(0,1fr))}#app #mental-run-screen[data-kind=test] #mental-run-navigation>#mental-note-tools{grid-column:1;grid-row:1;min-width:0;width:100%;margin:0;flex:none}#app #mental-run-screen[data-kind=test] #mental-run-navigation>#mental-note-tools button{height:44px;min-height:44px;max-height:44px;padding:4px;font-size:14px}#app #mental-run-screen[data-kind] #mental-run-question-panel .mental-answer-line{flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:8px}#app #mental-run-screen[data-kind] #mental-run-question{order:0;flex:none;width:100%;min-width:0;white-space:normal;overflow-wrap:normal;text-align:center;font-size:26px;line-height:1.2}#app #mental-run-screen[data-kind] #mental-answer-field{order:0!important;flex:none;width:min(240px,100%);height:80px;min-height:80px}#app #mental-run-screen[data-kind] #mental-run-answer{width:100%;height:100%!important;min-height:0!important;font-size:38px;line-height:1.1}#app #mental-run-screen[data-kind] #mental-run-answer[data-long-value=true]{font-size:26px}#answer-editor[open]{position:fixed;top:auto;bottom:6px;margin:0 auto;height:min(360px,52dvh);width:calc(100% - 12px);padding:10px;gap:8px}#answer-editor[open] .answer-editor-heading h2{font-size:18px}#answer-editor[open] #answer-editor-question{font-size:17px}html[data-answer-editor=open] #lesson-screen .lesson-layout{height:calc(48dvh - 120px)!important;min-height:120px!important}#answer-editor[open] #answer-correction-keys button{min-height:30px}#app[data-screen=years] #year-identity{margin-bottom:12px}#app[data-screen=years] #year-identity img{width:88px;height:88px}#app[data-screen=years] #year-identity h1{font-size:28px}}@media screen{#app:has(#lesson-screen[data-stage=Assessment]:not([hidden])) #header-progress{display:none!important}#app #mental-run-screen[data-kind=test] .mental-answer-line{align-items:center!important}#app #mental-run-screen[data-kind=test] #mental-answer-field{display:flex;align-items:center;justify-content:center;align-self:center;flex:none}#app #mental-run-screen[data-kind=test] #mental-run-question{min-width:0;white-space:normal;overflow-wrap:anywhere}#app #mental-run-screen[data-kind=test] #mental-run-answer{height:100%!important;min-height:72px!important;line-height:1}#app #lesson-screen[data-stage=Assessment][data-assessment-split=true] #test-check-board>.workspace-title{height:60px;min-height:60px;display:flex;align-items:center;justify-content:center;font-size:18px}#app #mental-test-keypad button{min-width:0}}@media screen and (min-width:800px){#app #print-screen .option-row .option-description{display:block!important;font-size:14px;line-height:1.3;margin-top:6px}#app #print-screen .option-row .option-copy>span:first-child{font-size:17px;line-height:1.2}#app #print-screen .option-row{padding:6px}}@media print{.sats-header h2 .print-underlining-reminder{font-weight:400}}@media screen{#app #lesson-screen[data-stage=Together][data-hint-targets=false] .type-line-target:not(:focus-visible),#app #lesson-screen[data-stage=Guided][data-hint-targets=false] .type-line-target:not(:focus-visible){background:transparent!important;border-color:transparent!important;box-shadow:none!important;color:transparent}#answer-copy-preview[hidden]{display:none!important}#answer-copy-preview{font-size:13px;color:var(--text-soft);text-align:center}#answer-copy-preview-svg{display:block;position:static!important;width:100%!important;height:54px!important;overflow:hidden;pointer-events:none}#answer-copy-preview-svg path{stroke:var(--ink);fill:none;stroke-linecap:round;stroke-linejoin:round}#app #lesson-screen[data-stage=Check] #completed-equation{height:var(--reference-header,var(--reference-cell))!important;min-height:var(--reference-header,var(--reference-cell))!important;display:flex;align-items:center;justify-content:center;gap:.16em;overflow:visible}#app #lesson-screen #completed-equation .inline-fraction{margin:0 .08em;flex:none}}@media print{.sats-header .print-equation.missing-question{justify-content:flex-start!important;text-align:left}}@media screen{#saved-test-answers .unknown-rectangle,#app .assessment-review-question .unknown-rectangle{display:inline-flex;min-width:70px;width:3em;height:1.3em;border:1px solid var(--tone-9fb9db);vertical-align:middle}}@media screen{dialog{border:2px solid var(--brand)!important}#learning-stage-intro{max-width:650px;width:calc(100% - 32px);padding:24px}#learning-stage-intro #activity-dialog{background:transparent;border:0;padding:0;overflow:visible;max-height:none}#learning-stage-intro #activity-title{display:block;color:var(--brand);font-size:26px;margin:0 0 18px}#learning-stage-intro .intro-choice{display:none!important}#learning-stage-intro .actions{display:flex;gap:12px;margin-top:20px}#method-description{font-size:17px;line-height:1.4;color:var(--text-soft);margin:8px 0 0}#app .method-options:has(.current-method){padding:18px}html[data-page-scroll=practice] #app>header{position:sticky;top:0;z-index:40;background:var(--page,var(--tone-f2f6fc));padding-top:0;padding-bottom:0}.mental-topic h3,.mental-topic .mental-example{text-align:center;width:100%}.practice-comparison .unknown-rectangle{display:inline-flex;align-items:center;justify-content:center;min-width:2.2em;height:1.3em;border:1px solid var(--tone-9fb9db);vertical-align:middle}#answer-editor-paper{background-color:white;background-image:repeating-linear-gradient(to right,transparent 0,transparent calc(100%/var(--answer-cells,4) - 1px),var(--tone-d6e0e9) calc(100%/var(--answer-cells,4) - 1px),var(--tone-d6e0e9) calc(100%/var(--answer-cells,4)))}#answer-editor-paper:has(#answer-correction:not([hidden])){background-image:none}#app .operation-target{background:#fff0ce!important;box-shadow:0 0 0 2px #e0a126!important;border-radius:10px;animation:target-pulse 1.5s ease-in-out infinite}#app #lesson-screen[data-input-mode=Write] .fraction-quantity{pointer-events:none}#app #lesson-screen[data-input-mode=Write] .same-denominator-quantity{pointer-events:none}#completed-equation.fraction-amount-reference{font-size:calc(var(--reference-question-unit)*.9)!important;white-space:nowrap}#completed-equation.fraction-amount-reference .inline-fraction{display:inline-flex;flex-direction:column;align-items:center;line-height:1.05;font-size:.83em;vertical-align:middle}#completed-equation.fraction-amount-reference .inline-fraction>span:first-child{border-bottom:1.5px solid currentColor;width:100%;text-align:center}#written-pen-tools,#mental-pen-tools{display:flex;justify-content:center;align-items:center;gap:10px}#written-pen-tools .pen-tools-caret,#mental-pen-tools .pen-tools-caret{margin-left:0}.practice-comparison{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;width:100%}.comparison-pane{padding:14px;border:1px solid var(--line,var(--tone-d4dfec));background:white;border-radius:16px;min-width:0}.comparison-pane h2{text-align:center;font-size:19px;margin:0 0 10px}.comparison-pane .comparison-equation{font-size:18px;text-align:center;min-height:36px;margin:0 0 10px}.comparison-pane>svg{display:block;width:100%;height:290px}.pupil-comparison-ink{stroke:var(--ink);fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}#result-screen:has(.practice-comparison){padding:20px;gap:12px}#result-screen:has(.practice-comparison) #result-title{font-size:26px;margin:0}#result-screen:has(.practice-comparison) #result-message{font-size:17px;margin:0}}@media screen and (max-width:650px){.practice-comparison{gap:8px}.comparison-pane{padding:8px}.comparison-pane h2{font-size:16px}.comparison-pane .comparison-equation{font-size:13px}.comparison-pane>svg{height:220px}#result-screen:has(.practice-comparison){padding:12px}#completed-equation.fraction-amount-reference{font-size:clamp(17px,5.5vw,27px)!important;gap:.08em!important}#app #question-text{max-width:100%}#learning-stage-intro{padding:18px}}@media screen{#app #written-pen-tools .disclosure-triangle,#app #mental-pen-tools .disclosure-triangle{margin-left:0}#app #skill-choices .practice-topic{min-height:0;height:auto}#app #header-note[hidden]{display:none!important}.reference-answer{background:var(--tone-e4efff);border-radius:4px;padding:.02em .1em}#app .lesson-guide #lesson-actions,#app #phone-playback-footer #lesson-actions{display:flex!important}#app #lesson-actions #again{order:0}#app #lesson-actions #main-action{order:1}#app .mental-controls #mental-replay{order:0}#app .mental-controls #mental-pause{order:1}}@media screen and (max-width:650px){#app #lesson-screen .question-content.simple-question{gap:calc(var(--qcell)*.28)}#app #lesson-screen .simple-question .question-token.number{font-size:min(30px,calc(var(--qcell)*1.08))}#app #lesson-screen .simple-question .question-token:is(.operation,.symbol){font-size:calc(var(--qcell)*.9)}#app #lesson-screen .simple-question #answer-slot{min-height:40px;height:max(40px,var(--qcell));align-self:center}#app #lesson-screen .simple-question :is(#answer-box,#answer-display){font-size:max(16px,calc(var(--qcell)*.72))}}@media print{.print-balanced-known,.print-balanced-other{display:inline-flex;gap:2mm;align-items:center;border-bottom:1.4px solid var(--tone-456f9c);padding-bottom:2px}}@media screen{#app #test-overview{width:calc(100% - 24px);margin-inline:12px}#app #test-overview-content{width:100%;grid-template-rows:minmax(0,1fr)}#app #test-overview .test-history-card{grid-column:1;grid-row:1;align-self:stretch}#app #test-focus{grid-column:2;grid-row:1;min-width:0;box-sizing:border-box}}@media screen and (max-width:800px){#app #test-overview-content{grid-template-rows:minmax(180px,1fr) min(46dvh,300px);gap:10px}#app #test-focus{grid-column:1;grid-row:2;padding:12px;height:100%;max-height:none}#app #assessment-toolbar{box-sizing:border-box;max-width:100%;padding-inline:0}#app #assessment-toolbar #work-preferences{min-width:0;flex:0 1 auto}#app #assessment-toolbar #assessment-actions{margin-left:auto;min-width:0}}@media screen and (max-height:500px) and (min-width:651px){#app #mental-screen .mental-lesson-guide{padding:12px;gap:6px;overflow:hidden}#app #mental-screen .mental-controls{padding:4px;gap:4px;height:auto;min-height:96px;grid-template-columns:repeat(2,minmax(0,1fr));grid-template-rows:44px 44px}#app #mental-screen .mental-controls>.actions,#app #mental-screen .mental-controls>.playback-navigation{grid-column:1/-1!important}#app #mental-screen .mental-controls>.actions{grid-row:1!important}#app #mental-screen .mental-controls>.playback-navigation{grid-row:2!important}}@media screen{#app #mental-screen[data-phase]{flex:1 1 0!important;height:0;max-height:calc(var(--app-height,100dvh) - 44px);box-sizing:border-box}}@media screen{#app #test-overview :is(#score-chart,#mental-score-chart)>svg{display:block;width:100%;height:100%;max-height:none;max-width:none}#app #lesson-screen #completed-equation.fraction-amount-reference{font-size:calc(var(--reference-question-unit)*.78)!important;gap:.08em!important}#app #lesson-screen #completed-equation.fraction-amount-reference .inline-fraction{font-size:1em;line-height:1}#app #lesson-screen #completed-equation.fraction-amount-reference .inline-fraction>span{line-height:1;padding:0}#app #lesson-screen #completed-board.same-denominator-reference #completed-equation{font-size:34px!important}#app #lesson-screen[data-stage=Check] #printed-question.same-denominator-question .question-token.fraction{font-size:inherit}}@media screen and (max-width:650px){#app #lesson-screen #completed-board.same-denominator-reference #completed-equation{font-size:clamp(23px,6.2vw,28px)!important}}@media screen{#app #lesson-screen[data-stage=Check] .same-denominator-question .question-token.fraction{font-size:inherit!important}}@media screen{#app[data-screen=years] #year-screen{background:transparent;border:0;box-shadow:none;width:min(1160px,calc(100% - 32px));padding:20px 0;margin:auto;gap:24px;box-sizing:border-box}#app #year-identity{gap:18px;margin:0}#app #year-identity h1{margin:0}#app #year-screen>h1{margin:0;font-size:26px}#app #year-choices{gap:14px;flex:none}#app #year-choices button{background:white;border:1px solid var(--line);border-radius:18px;min-height:90px;font-size:24px;color:var(--ink)}#app #skill-screen[data-unified=true] #skill-choices{grid-template-columns:repeat(4,minmax(0,1fr));grid-auto-rows:minmax(180px,auto)}#app #skill-screen .practice-topic{gap:16px;padding:18px}#app #skill-screen .practice-topic h2{margin:0;min-height:52px;display:block;text-align:center;align-content:center}.title-qualifier{display:block;white-space:nowrap}#app :is(h2,h3):has(>.title-qualifier){display:block!important}#app .mental-topic{display:grid;grid-template-rows:auto minmax(40px,1fr) 44px;gap:10px;padding:14px;min-height:188px;align-items:center}#app .mental-topic h3{display:flex;align-items:center;justify-content:center;min-height:0;font-size:20px;line-height:1.3;margin:0;text-align:center}#app .mental-topic .mental-example{font-size:24px;line-height:1.2;margin:0;padding:0;align-self:center;text-align:center;min-height:0;flex:none}#app .mental-topic .mental-actions{margin:0;align-self:end;gap:8px;width:100%}#app .mental-group>h2{font-size:20px;font-weight:600;line-height:1.3;padding:10px 0;margin:12px 0 16px;border-bottom:2px solid var(--line)}#app[data-screen=mentalChoices] #mode-label{font-size:26px;font-weight:700}#section-intro-dialog{width:min(650px,calc(100% - 32px));padding:24px;border-radius:var(--card-radius);box-sizing:border-box}#section-intro-dialog h2{margin:0 0 16px;font-size:26px;color:var(--brand);text-align:center}#section-intro-copy{margin:0;line-height:1.5;font-size:19px;text-align:center}#section-intro-dialog .intro-actions{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:22px 0 0}#section-intro-dialog .intro-actions button{width:100%;margin:0;font-size:16px;padding:10px;line-height:1.3}#checking-prerequisites .actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}#checking-prerequisites-dismiss{grid-column:1;grid-row:1}#checking-continue{grid-column:2;grid-row:1}#checking-prerequisites .actions button{font-size:16px;margin:0}#checking-prerequisites-list{padding:0;list-style:none;margin:14px 0;display:flex;flex-wrap:wrap;gap:8px;justify-content:center}#app :is(#method-screen,#mental-setup-screen,#print-screen) .option-row{position:relative;display:grid;grid-template-columns:52px minmax(0,1fr) 28px;grid-template-rows:minmax(48px,auto);gap:6px;margin:0!important;padding:0 6px!important;border:0!important;min-height:48px;align-items:center;box-sizing:border-box}#app :is(#method-screen,#mental-setup-screen,#print-screen) .option-row::before{grid-column:1/-1;grid-row:1;height:100%;min-height:48px}#app :is(#method-screen,#mental-setup-screen,#print-screen) .option-row .option-copy>span:first-child{grid-column:2;grid-row:1;font-size:15px;line-height:1.25;padding:8px 0!important;min-width:0;align-self:center}#app :is(#method-screen,#mental-setup-screen,#print-screen) .option-description{display:none!important}#app #print-screen{width:min(1160px,calc(100% - 24px));max-width:1160px;overflow:hidden}#app #print-screen #print-content,#app #print-screen #print-settings{display:flex;flex-direction:column;flex:0 1 auto;min-height:0;gap:var(--options-gap);overflow:visible}#app #print-screen .print-selection{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;flex:none}#app #print-screen .print-selection label{min-width:0;min-height:0;grid-column:auto;grid-row:auto}#app #print-screen[data-print-kind=assessment] #print-sheet-field{grid-column:1/-1}#app #print-screen[data-print-kind=assessment] #print-sheet-label{display:none}#app #print-screen .print-options{display:grid;grid-template-columns:minmax(0,1fr);grid-auto-rows:max-content;gap:12px;flex:none}#app #print-screen #print-model-options{display:grid;grid-column:1/-1;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;padding:10px;margin:0;box-sizing:border-box}#app #print-screen #print-model-options.single-option{grid-column:auto;padding:0;border:0;background:none;grid-template-columns:1fr}#app #print-screen .option-disabled{opacity:1}#app #print-screen .option-disabled .option-copy,#app #print-screen .option-disabled input{opacity:.5}#app #print-screen .print-footer{position:static;margin:0;padding:0;flex:none;z-index:1}#app #print-method-note{display:none}#app-accent{display:flex;flex-wrap:wrap;gap:6px;align-items:center}#app-accent button{display:flex;align-items:center;justify-content:center;width:44px;height:44px;min-width:44px;padding:6px;background:transparent;border:2px solid transparent;border-radius:10px}#app-accent button>span{display:block;width:26px;height:26px;background:var(--swatch);border-radius:4px}#app-accent button[aria-checked=true]{border-color:var(--brand);background:var(--surface-selected)}#saved-test-dialog{width:min(1000px,calc(100% - 24px));max-height:calc(100dvh - 24px);padding:20px;border:1px solid var(--line);border-radius:18px;box-sizing:border-box}#saved-test-dialog[open]{display:flex;flex-direction:column;gap:14px}#saved-test-title{flex:none;text-align:center;font-size:26px;margin:0}#saved-test-answers{overflow:auto;min-height:0;display:flex;flex-direction:column;gap:0}#saved-test-close{flex:none;margin:0}.saved-answer-row{display:grid;grid-template-columns:28px minmax(0,1fr) auto;gap:8px;align-items:center;padding:10px 4px;border-bottom:1px solid var(--line);text-align:left}.saved-answer-number{align-self:start;font-size:16px;padding-top:3px}.saved-answer-copy{min-width:0}.saved-answer-calculation{display:flex;flex-wrap:wrap;gap:5px;align-items:center;font-size:19px;line-height:1.3;margin:0!important;text-align:left!important}.saved-answer-status{font-size:13px;line-height:1.35;margin:4px 0 0!important;text-align:left!important;color:var(--text-soft)}.saved-answer-row.correct .saved-answer-status{color:#286447}.score-practice-links{display:flex;flex-direction:column;gap:6px;margin:0}.saved-answer-correction{margin-top:2px!important}#saved-test-dialog[data-kind=mental] .saved-answer-row{align-items:start}.score-practice-links button{min-height:40px;font-size:14px;padding:6px 10px;margin:0}#app #test-focus h2{font-size:20px;text-decoration:underline;text-underline-offset:5px;margin:0 0 10px;text-align:center}#app #test-focus>p{font-size:15px;line-height:1.4;margin:0;color:var(--muted)}#app #test-focus ol{list-style:none;counter-reset:focus;display:grid;gap:6px;padding:0;margin:0}#app #test-focus li{counter-increment:focus;display:grid;grid-template-columns:22px minmax(0,1fr);gap:6px 8px;align-items:center;padding:6px 8px;background:var(--surface-selected);border-radius:10px}#app #test-focus li::before{content:counter(focus);font-size:13px;color:var(--brand);text-align:center}#app #test-focus h3{font-size:15px;line-height:1.3;text-align:center;margin:0}.focus-actions{grid-column:2;display:flex;gap:6px}#app #test-focus button{flex:1;min-height:36px;padding:6px 8px;margin:0;font-size:14px}}@media screen and (max-width:1099px){#app #skill-screen[data-unified=true] #skill-choices{grid-template-columns:repeat(2,minmax(0,1fr))}#app #print-screen #print-model-options{grid-template-columns:repeat(2,minmax(0,1fr))}}@media screen and (max-width:800px){#app :is(#print-screen,#method-screen,#mental-setup-screen){--options-inset:12px;--options-gap:10px}#app #print-screen .print-options,#app #print-screen #print-model-options{gap:8px}#app :is(#method-screen,#mental-setup-screen,#print-screen) .option-row{grid-template-columns:44px minmax(0,1fr) 24px;gap:4px;min-height:48px;padding-inline:4px!important}#app :is(#method-screen,#mental-setup-screen,#print-screen) .option-row .option-copy>span:first-child{font-size:13px}}@media screen and (max-width:650px){#app #test-focus h2{text-align:center}#app #year-screen>h1{font-size:22px}#app #year-identity img{width:100px;height:100px}#app #year-identity h1{font-size:28px}#app #year-screen #year-choices{gap:10px}#app #year-choices button{min-height:64px;font-size:21px}#section-intro-dialog{padding:18px}#section-intro-dialog h2{font-size:24px}#section-intro-copy{font-size:17px}#section-intro-dialog .intro-actions{gap:8px;margin-top:18px}#section-intro-dialog .intro-actions button{font-size:14px;padding:8px}#checking-prerequisites .actions button{font-size:13px;padding:8px}#app #mental-choices .mental-topic{display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:1fr auto auto;height:auto;min-height:154px;padding:9px 12px;gap:6px}#app #mental-choices .mental-topic h3{display:block;align-content:center;align-self:stretch;min-height:min-content;font-size:17px}#app .mental-topic .mental-example{font-size:21px}.saved-answer-row{grid-template-columns:24px minmax(0,1fr) auto;gap:6px;padding:8px 2px}.saved-answer-calculation{font-size:17px}.saved-answer-status{font-size:12px}.score-practice-links{grid-column:3;grid-row:1;justify-content:center}.score-practice-links button{min-height:36px;font-size:13px;padding:5px 8px}#saved-test-dialog{padding:14px}#saved-test-title{font-size:23px}}@media screen and (max-height:500px) and (min-width:651px){#app #year-screen #year-identity{flex-direction:row;gap:16px}#app #year-screen #year-identity img{width:70px;height:70px}#app #year-screen{gap:10px;padding:10px 0}#app #year-screen #year-choices button{min-height:52px}#app #print-screen .print-options{gap:6px}#app #print-screen #print-model-options{grid-template-columns:repeat(3,minmax(0,1fr));padding:6px;gap:6px}#app #print-screen .print-selection label{font-size:12px;display:flex;align-items:center;gap:6px}#app #print-screen select{min-height:36px}#app #print-screen .print-selection{gap:8px}} :root{--tone-0067a9:#0067a9;--tone-10213d:#10213d;--tone-17334e1a:#17334e1a;--tone-1d314c1f:#1d314c1f;--tone-203b5a26:#203b5a26;--tone-244b7c:#244b7c;--tone-244f84:#244f84;--tone-253e4826:#253e4826;--tone-253e4859:#253e4859;--tone-263f63:#263f63;--tone-263f6326:#263f6326;--tone-263f632e:#263f632e;--tone-263f634d:#263f634d;--tone-29446c:#29446c;--tone-315d94:#315d94;--tone-324b6c:#324b6c;--tone-345d97:#345d97;--tone-35689f:#35689f;--tone-365b84:#365b84;--tone-366ca6:#366ca6;--tone-376b9e:#376b9e;--tone-3b6399:#3b6399;--tone-456f9c:#456f9c;--tone-487ca6:#487ca6;--tone-5684bd:#5684bd;--tone-5689cc15:#5689cc15;--tone-5689cc40:#5689cc40;--tone-5c6f86:#5c6f86;--tone-65758e:#65758e;--tone-6687bc:#6687bc;--tone-668dbf:#668dbf;--tone-6f9ed0:#6f9ed0;--tone-718197:#718197;--tone-7792b4:#7792b4;--tone-7a879a:#7a879a;--tone-7b9fc8:#7b9fc8;--tone-7c8da5:#7c8da5;--tone-80a9d6:#80a9d6;--tone-86b0dc:#86b0dc;--tone-8aa7c8:#8aa7c8;--tone-8b99aa:#8b99aa;--tone-8da2bc:#8da2bc;--tone-8eb1da:#8eb1da;--tone-91a9c9:#91a9c9;--tone-9aacc3:#9aacc3;--tone-9aafc9:#9aafc9;--tone-9caec5:#9caec5;--tone-9eafc5:#9eafc5;--tone-9fb9db:#9fb9db;--tone-a2b1c4:#a2b1c4;--tone-a3b2c6:#a3b2c6;--tone-a5bfdf:#a5bfdf;--tone-a9b9cd:#a9b9cd;--tone-aac3df:#aac3df;--tone-acc7e8:#acc7e8;--tone-afc8e8:#afc8e8;--tone-b0c8e4:#b0c8e4;--tone-b4cce9:#b4cce9;--tone-b4cdeb:#b4cdeb;--tone-b7c4d4:#b7c4d4;--tone-b8dcff40:#b8dcff40;--tone-b8dcff50:#b8dcff50;--tone-bdcfe8:#bdcfe8;--tone-bdd2eb:#bdd2eb;--tone-c3d8f1:#c3d8f1;--tone-c9dbef:#c9dbef;--tone-cbd4e9:#cbd4e9;--tone-cbdcf1:#cbdcf1;--tone-cfdae9:#cfdae9;--tone-cfdef0:#cfdef0;--tone-cfdfef:#cfdfef;--tone-d0dff0:#d0dff0;--tone-d1e1f2:#d1e1f2;--tone-d2e2f3:#d2e2f3;--tone-d2e4f6:#d2e4f6;--tone-d4dfec:#d4dfec;--tone-d4e0f3:#d4e0f3;--tone-d4e3f4:#d4e3f4;--tone-d5dfec:#d5dfec;--tone-d5e0ee:#d5e0ee;--tone-d5e2f0:#d5e2f0;--tone-d6e0e9:#d6e0e9;--tone-d6e4f4:#d6e4f4;--tone-d6e4f5:#d6e4f5;--tone-d6e5f5:#d6e5f5;--tone-d7e5f4:#d7e5f4;--tone-d8e5f5:#d8e5f5;--tone-d8e5f6:#d8e5f6;--tone-d9e6ee:#d9e6ee;--tone-d9e8f1:#d9e8f1;--tone-d9ecff:#d9ecff;--tone-dbe5f2:#dbe5f2;--tone-dbeaff:#dbeaff;--tone-dce2eb:#dce2eb;--tone-dce6f2:#dce6f2;--tone-dce9ef:#dce9ef;--tone-dcecff:#dcecff;--tone-dcecff70:#dcecff70;--tone-dfe6f0:#dfe6f0;--tone-e0e7ef:#e0e7ef;--tone-e0e7f0:#e0e7f0;--tone-e2efff:#e2efff;--tone-e2efff66:#e2efff66;--tone-e2f0ff:#e2f0ff;--tone-e3efff:#e3efff;--tone-e4efff:#e4efff;--tone-e4f0ff:#e4f0ff;--tone-e5edf7:#e5edf7;--tone-e5edf8:#e5edf8;--tone-e5f1ff:#e5f1ff;--tone-e7edf5:#e7edf5;--tone-e7f0fd:#e7f0fd;--tone-e7f1ff:#e7f1ff;--tone-e7f2ff:#e7f2ff;--tone-e8f1fd:#e8f1fd;--tone-e9f0fd:#e9f0fd;--tone-eaf0f8:#eaf0f8;--tone-eaf2fe:#eaf2fe;--tone-edf1f7:#edf1f7;--tone-edf4fd:#edf4fd;--tone-edf5ff:#edf5ff;--tone-eef4fd:#eef4fd;--tone-eef5ff:#eef5ff;--tone-f0f4fa:#f0f4fa;--tone-f2f5fa:#f2f5fa;--tone-f2f6fc:#f2f6fc;--tone-f3f5f8:#f3f5f8;--tone-f4f8ff:#f4f8ff;--tone-f6f9ff:#f6f9ff;--tone-f8fafd:#f8fafd;--tone-f9fbff:#f9fbff}@media screen{#app #print-screen .print-switch.option-row::before{grid-column:1/-1!important}#app .colour-setting{gap:14px}}@media screen and (max-width:650px){#app #print-screen .print-switch.option-row{gap:0 4px;padding:0 4px!important}#app #print-screen .print-switch.option-row::before{grid-column:1/-1!important}#app #print-screen .print-switch.option-row input{justify-self:center;align-self:center}#app #print-screen .print-switch.option-row .option-copy>span:first-child{align-self:center}#app #print-screen #print-model-options{padding:6px;gap:6px}#app #print-screen .print-options{gap:6px}}@media screen and (max-height:500px) and (min-width:651px){#app #print-screen[data-print-details] .print-selection label{flex-direction:row!important;align-items:center;gap:6px}#app #print-screen[data-print-details] .print-switch .option-copy>span:first-child{font-size:13px;line-height:1.2}#app #print-screen .print-selection label>span{flex:none}#app #print-screen[data-print-details] .print-selection label{flex-wrap:nowrap!important}#app #print-screen .print-selection select{flex:1;min-width:0;width:0;min-height:36px!important;height:36px}#app #print-screen #print-model-options{padding-block:4px}}@media screen{#app #home-brand span{max-width:none;white-space:nowrap}#app #tools{flex-direction:row} :is(#phone-hint-dialog,#print-option-dialog) :is(h2,p,.hint-card-content){text-align:center}}@media screen and (max-width:650px){#app #home-brand{font-size:clamp(14px,4vw,17px)}}@media screen{html,body{overscroll-behavior:none}#app #home-screen{display:flex;flex-direction:column;justify-content:flex-start;width:min(1120px,calc(100% - 32px));max-width:1120px;padding:8px 0 12px;gap:18px;box-sizing:border-box}#app #home-introduction{flex:none;width:100%;max-width:none;align-self:center;padding:18px 26px;background:var(--surface-selected);border:1px solid var(--line);border-radius:18px;box-sizing:border-box;text-align:center}#app #home-year{font-size:28px;font-weight:700;margin:0 0 12px;color:var(--ink)}#app #home-introduction #year-advice{display:block;margin:0;padding:0;border:0;background:none;box-shadow:none;max-width:none;width:100%}#app #home-introduction #year-advice>p{font-size:16px;line-height:1.45;margin:0;padding:0;background:none;border:0;box-shadow:none;text-align:center;width:100%;max-width:none;box-sizing:border-box}#app #home-introduction #year-advice #sound-advice{border-top:1px solid var(--edge);margin-top:12px;padding-top:12px}#app #home-screen .home-choices{flex:1 1 0;min-height:0;margin:0;width:100%;grid-template-columns:repeat(2,minmax(0,1fr));grid-template-rows:repeat(2,minmax(0,1fr));gap:14px}#app #home-screen .home-card{display:grid!important;grid-template-columns:1fr!important;grid-template-rows:80px auto;align-content:center;justify-items:center;gap:8px;min-height:0;padding:14px;text-align:center;box-sizing:border-box}#app #home-screen .home-card .card-icon{display:flex!important;grid-column:1!important;grid-row:1!important;width:80px;height:80px;align-items:center;justify-content:center;margin:0;justify-self:center;border-radius:16px;background:var(--surface-selected)}#app #home-screen .home-card .card-icon svg{width:44px;height:44px;flex:none}#app #home-screen .home-card .card-copy{grid-column:1!important;grid-row:2!important;display:grid!important;grid-template-columns:minmax(0,1fr);grid-template-rows:auto auto;align-items:start;justify-content:center;text-align:center;gap:6px!important;width:100%;min-width:0}#app #home-screen .home-card strong{grid-column:1;grid-row:1;font-size:24px;line-height:1.25;text-align:center}#app #home-screen .home-card small{grid-column:1;grid-row:2;font-size:17px;line-height:1.4;text-align:center}#app #home-screen .card-arrow{display:none}#app #home-screen .home-footer{flex:none;margin:0}#app>header>#header-context{grid-column:2;grid-row:1;align-self:center;height:44px;min-height:0;max-height:44px;margin:0;padding:0;align-content:center}#app #header-context #mode-label{margin-block:0}#app :is(#method-screen,#mental-setup-screen).setup-page{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-template-rows:auto minmax(0,1fr) 48px;align-items:stretch;width:calc(100% - 24px);max-width:none;height:calc(var(--app-height,100dvh) - 64px);max-height:calc(var(--app-height,100dvh) - 64px);margin:8px auto 12px;padding:var(--options-inset);gap:var(--options-gap);box-sizing:border-box;overflow:hidden}#app :is(#method-screen,#mental-setup-screen).setup-page>.support-options-disclosure{grid-column:1;grid-row:2;min-height:0;overflow:auto;overscroll-behavior:contain}.support-options-disclosure>summary{display:none}#app :is(#method-screen,#mental-setup-screen).setup-page .method-options{display:flex;flex-direction:column;gap:12px;align-content:start;min-width:0;min-height:0;max-height:none;overflow:auto;overscroll-behavior:contain;padding:0 4px 0 0;margin:0;width:100%}#app :is(#method-screen,#mental-setup-screen).setup-page .current-method{grid-column:1;grid-row:1;display:block!important;flex:none;background:transparent;border:0;border-radius:0;width:100%;padding:0;margin:0;text-align:left;min-height:0}#app :is(#method-screen,#mental-setup-screen).setup-page .current-method>h2{display:block!important;font-size:22px;line-height:1.25;min-height:0;margin:0 0 6px;text-align:left;align-content:start}#app :is(#method-screen,#mental-setup-screen).setup-page .current-method p{font-size:16px;line-height:1.4;margin:0;text-align:left}#app #method-screen .report-note{display:none}#app #method-model-options{display:flex;flex-direction:column;gap:16px;padding:10px;flex:none}#app :is(#method-screen,#mental-setup-screen).setup-page .option-row,#tools-dialog .settings-panel .option-row{grid-template-columns:52px minmax(0,1fr);grid-template-rows:minmax(48px,auto) auto;column-gap:12px;row-gap:7px;margin:0!important;padding:0 12px!important;border:0!important;flex:none}#app :is(#method-screen,#mental-setup-screen).setup-page .option-row::before,#tools-dialog .settings-panel .option-row::before{grid-column:1/-1;grid-row:1;min-height:48px;height:100%;margin-inline:-12px}#app :is(#method-screen,#mental-setup-screen).setup-page .option-row .option-copy>span:first-child,#tools-dialog .settings-panel .option-row .option-copy>span:first-child{font-size:16px;padding-block:10px!important}#app :is(#method-screen,#mental-setup-screen).setup-page .option-row .option-description,#tools-dialog .settings-panel .option-row .option-description{display:block!important;grid-column:1/-1;grid-row:2;font-size:14px;line-height:1.4;padding:0 2px;margin:0}#app :is(#method-screen,#mental-setup-screen).setup-page>.setup-footer{grid-column:1/-1;grid-row:3;margin:0}#app #method-screen.setup-page[data-lesson-guide=true]{grid-template-rows:52px auto minmax(0,1fr) 48px}#app #method-screen[data-lesson-guide=true]>.print-choices{grid-column:1/-1;grid-row:1}#app #method-screen[data-lesson-guide=true]>.current-method{grid-column:1;grid-row:2}#app #method-screen[data-lesson-guide=true]>#guide-options-disclosure{grid-column:1;grid-row:3;min-height:0;overflow:auto;overscroll-behavior:contain}#app #guide-options-disclosure>summary{display:none}#app #guide-options-disclosure>.method-options{display:flex;flex-direction:column;gap:14px;min-height:0}#app #method-screen[data-lesson-guide=true]>.learning-preview{grid-row:2/span 2}#app #method-screen[data-lesson-guide=true]>.setup-footer{grid-row:4;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}#app #method-screen[data-lesson-guide=true]>.setup-footer button{display:flex;align-items:center;justify-content:center;text-align:center;height:48px;margin:0;padding:4px 8px;font-size:16px;line-height:1.2}#app .learning-preview{touch-action:none;grid-column:2;grid-row:1/span 2;display:flex;flex-direction:column;align-self:stretch;min-width:0;min-height:0;height:100%;padding:18px;border:1px solid var(--line);border-radius:16px;background:var(--surface);box-sizing:border-box;overflow:hidden}#app .learning-preview h3{flex:none;font-size:18px;line-height:1.3;min-height:24px;margin:0 0 18px;text-align:center}#app .learning-preview-question{display:flex;flex:none;flex-wrap:wrap;gap:6px;align-items:center;justify-content:center;font-size:clamp(22px,2.1vw,34px);font-weight:600;line-height:1.3;height:88px;min-height:88px;margin:0 0 12px}#app .learning-preview-question[data-worded]{height:auto;min-height:0;text-align:center;align-content:center;row-gap:8px}.learning-preview-question .inline-fraction{font-size:1em;position:relative}.learning-preview-question .inline-fraction>span{position:relative}#app .learning-preview-question .preview-answer{border:1px solid var(--edge);min-width:2.2em;height:1.7em;display:inline-flex;align-items:center;justify-content:center;padding:0 5px}#app .learning-preview-question .preview-answer:has(.inline-fraction){height:2.6em;padding-block:3px}.preview-operation-slot{display:inline-flex;width:1.4em;height:1.4em;align-items:center;justify-content:center;border:1.3px solid transparent;border-radius:50%}.preview-operation-slot.preview-operation{border-color:var(--exchange-ink)}.preview-operation-slot.preview-power{width:1.2em;height:1.2em;font-size:.8em;transform:translateY(-.18em)}.preview-underline-slot{border-bottom:1.5px solid transparent}.preview-underline-slot.preview-underlined{border-color:var(--exchange-ink)}.preview-known-side{display:inline-flex;align-items:center;gap:6px}.preview-tick-space{display:inline-block;position:relative;width:10px;height:.65em;vertical-align:super;line-height:0}.preview-tick-space>.preview-tick{position:absolute;left:0;top:2px;line-height:1;margin:0;font-size:.55em;color:var(--exchange-ink)}#app .learning-preview-paper{display:block;flex:1 1 0;width:100%;height:0;min-height:0;max-height:none;overflow:hidden}.learning-preview-paper[hidden],.learning-preview-question[hidden]{display:none!important}.learning-preview-note{display:none}#app .learning-preview-pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;flex:1;min-height:0}#app .learning-preview-pair figure{display:flex;flex-direction:column;min-width:0;min-height:0;margin:0}#app .learning-preview[data-paired=true]>h3{margin-bottom:0}#app .learning-preview-pair figcaption{flex:none;text-align:center;font-weight:600;font-size:15px;line-height:1.3;margin:0;padding-block:6px}#app .learning-preview-pair .learning-preview-question{font-size:clamp(16px,1.25vw,22px);height:62px;min-height:62px;gap:3px}.preview-grid{stroke:var(--line);stroke-width:.4;fill:none}.preview-review{fill:#f7b55b;opacity:.22}.preview-supplied{fill:var(--surface-selected);opacity:.7}.learning-preview-paper :is([data-preview-kind=line]>.math-stroke,.missing-model>.math-stroke,.missing-number-rectangle,[data-round-mark]>.math-stroke,.cancellation,.completed-three-link){stroke-width:1.5;vector-effect:non-scaling-stroke}#section-intro-dialog .intro-actions,#checking-prerequisites .actions{align-items:stretch;grid-auto-rows:auto}#section-intro-dialog .intro-actions button,#checking-prerequisites .actions button{align-self:stretch;min-height:54px;height:100%;box-sizing:border-box}}@media screen and (max-width:650px){#app{--options-preview-height:240px}#app #home-screen{padding:8px 0 12px;gap:12px}#app #home-introduction{padding:12px 14px}#app #home-year{font-size:24px;margin-bottom:10px}#app #home-introduction #year-advice>p{font-size:13px;line-height:1.4}#app #home-introduction #year-advice #sound-advice{margin-top:10px;padding-top:10px}#app #home-screen .home-choices{grid-template-rows:repeat(2,minmax(0,1fr));gap:10px}#app #home-screen .home-card{grid-template-rows:52px auto;min-height:0;padding:10px 8px;gap:8px}#app #home-screen .home-card .card-icon{width:52px;height:52px;border-radius:14px}#app #home-screen .home-card .card-icon svg{width:30px;height:30px}#app #home-screen .home-card .card-copy{grid-template-rows:auto auto}#app #home-screen .home-card strong{font-size:16px}#app #home-screen .home-card small{font-size:12px}#app :is(#method-screen,#mental-setup-screen).setup-page{grid-template-columns:minmax(0,1fr);grid-template-rows:auto minmax(0,auto) auto 48px;align-content:start}#app :is(#method-screen,#mental-setup-screen).setup-page .current-method{min-height:0}#app :is(#method-screen,#mental-setup-screen).setup-page .current-method>h2{font-size:18px;min-height:0;margin-bottom:6px;text-align:center}#app :is(#method-screen,#mental-setup-screen).setup-page .current-method p{font-size:14px;text-align:center}#app :is(#method-screen,#mental-setup-screen).setup-page>.support-options-disclosure{grid-column:1;grid-row:3}#app :is(#method-screen,#mental-setup-screen).setup-page .support-options-disclosure>.method-options{padding:var(--options-gap) 0 0}#app :is(#method-screen,#mental-setup-screen).setup-page .option-row .option-copy>span:first-child{font-size:15px}#app :is(#method-screen,#mental-setup-screen).setup-page .option-row .option-description{font-size:13px}#app :is(#method-screen,#mental-setup-screen).setup-page .learning-preview{grid-column:1;grid-row:2;padding:12px;height:auto}#app .learning-preview h3{font-size:16px;margin-bottom:4px}#app .learning-preview-question{font-size:20px;height:42px;min-height:42px;margin-bottom:4px}#app .learning-preview-paper{flex:0 1 auto;height:auto}#app :is(#method-screen,#mental-setup-screen).setup-page>.setup-footer{grid-row:4}#app .learning-preview-pair{display:flex;flex-direction:column;justify-content:center;gap:0}#app .learning-preview-pair figure{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);grid-template-rows:auto minmax(0,auto);column-gap:3px}#app .learning-preview-pair figcaption{grid-column:1/-1;margin:0;font-size:13px}#app .learning-preview-pair .learning-preview-question{font-size:16px;min-height:0;height:auto;align-self:center;margin:0}#app .learning-preview-pair .learning-preview-paper{height:auto;max-height:100%;min-height:0;align-self:start}#app .learning-preview-pair figure:has(.learning-preview-paper[hidden]) .learning-preview-question{grid-column:1/-1}#app #lesson-guide-methods{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}#app #lesson-guide-methods button{min-height:72px;font-size:15px}#app #print-selection-summary{flex-wrap:nowrap;grid-row:2;grid-column:1}#app #print-selection-summary h2{flex:1;font-size:18px;text-align:left}#app #print-screen #print-selection-summary:not(.centred-title) .print-selection:has(#print-sheet-field:not([hidden])){display:block;flex-basis:112px;margin:0}#app #print-screen .print-footer{grid-template-columns:repeat(2,minmax(0,1fr));grid-template-rows:48px;gap:10px}#app #print-submit{grid-column:auto}#app #print-sheet-numbers{display:none}#app #print-output{grid-column:1;grid-row:3}#app #print-screen #print-output button{font-size:14px}#app #print-screen[data-print-choosing=false]{grid-template-columns:minmax(0,1fr);grid-template-rows:52px auto auto minmax(0,auto) auto 48px;align-content:start}#app #print-screen[data-print-choosing=false]>#print-content{display:contents}#app #print-preview{grid-column:1;grid-row:4;height:auto;padding:12px}#app .print-preview-body{flex:0 1 auto;aspect-ratio:var(--preview-ratio,2)}#app #print-screen>.print-footer{grid-row:6}#app #print-options-disclosure{grid-column:1;grid-row:5}#app :is(#print-options-disclosure,.support-options-disclosure){max-height:25dvh}#app :is(#print-options-disclosure,.support-options-disclosure)>summary{display:flex;align-items:center;justify-content:space-between;gap:10px;min-height:44px;box-sizing:border-box;padding:8px 8px 8px 4px;border-bottom:1px solid var(--line);color:var(--brand);cursor:pointer;font-size:15px;font-weight:600;line-height:1.25;list-style:none}#app :is(#print-options-disclosure,.support-options-disclosure)>summary::-webkit-details-marker{display:none}#app :is(#print-options-disclosure,.support-options-disclosure)>summary::after{content:"";flex:none;border:5px solid transparent;border-bottom:0;border-top-color:var(--brand)}#app :is(#print-options-disclosure,.support-options-disclosure)[open]>summary::after{transform:rotate(180deg)}#app #print-options-disclosure #print-settings{padding-top:var(--options-gap)}#app #method-screen.setup-page[data-lesson-guide=true]{grid-template-rows:52px auto minmax(0,auto) auto 48px}#app #method-screen[data-lesson-guide=true]>.current-method{grid-row:2;grid-column:1}#app #method-screen[data-lesson-guide=true]>.learning-preview{grid-row:3}#app #method-screen[data-lesson-guide=true]>#guide-options-disclosure{grid-row:4;grid-column:1}#app #method-screen[data-lesson-guide=true]>.setup-footer{grid-row:5;gap:10px}}@media screen and (max-height:420px) and (min-width:520px) and (max-width:650px){#app :is(#method-screen,#mental-setup-screen).setup-page{grid-template-columns:repeat(2,minmax(0,1fr));grid-template-rows:auto minmax(0,1fr) 48px}#app :is(#method-screen,#mental-setup-screen).setup-page>.current-method{grid-column:1/-1;grid-row:1}#app :is(#method-screen,#mental-setup-screen).setup-page>.learning-preview{grid-column:2;grid-row:2;padding:8px}#app :is(#method-screen,#mental-setup-screen).setup-page>.support-options-disclosure{grid-column:1;grid-row:2;max-height:none}#app :is(#method-screen,#mental-setup-screen).setup-page>.setup-footer{grid-row:3}#app #method-screen.setup-page[data-lesson-guide=true]{grid-template-rows:52px auto minmax(0,1fr) 48px}#app #method-screen.setup-page[data-lesson-guide=true]>.current-method{grid-column:1/-1;grid-row:2}#app #method-screen.setup-page[data-lesson-guide=true]>.learning-preview{grid-column:2;grid-row:3}#app #method-screen.setup-page[data-lesson-guide=true]>#guide-options-disclosure{grid-column:1;grid-row:3;max-height:none}#app #method-screen.setup-page[data-lesson-guide=true]>.setup-footer{grid-row:4}}@media screen and (max-height:620px){#app #home-screen .home-card{min-height:0;grid-template-rows:46px auto;padding:8px;gap:8px}#app #home-screen .home-card .card-icon{width:46px;height:46px}#app #home-screen .home-card .card-icon svg{width:26px;height:26px}#app #home-introduction{padding:10px 14px}#app #home-year{font-size:23px;margin-bottom:6px}#app #home-introduction #year-advice>p{font-size:12px}#app #home-screen .home-card small{font-size:11px}#app #home-screen .home-choices{grid-template-rows:repeat(2,minmax(0,1fr))}}@media screen and (max-height:620px) and (max-width:650px){#app #home-screen{gap:8px}#app #home-introduction{padding:8px 12px}#app #home-year{margin-bottom:4px}#app #home-screen .home-card{grid-template-rows:38px auto;padding:6px;gap:5px}#app #home-screen .home-card .card-icon{width:38px;height:38px}#app #home-screen .home-card .card-icon svg{width:22px;height:22px}#app #home-screen .home-card .card-copy{gap:4px!important}}@media screen and (max-height:500px) and (min-width:651px){#app #home-screen .home-choices{grid-template-columns:repeat(4,minmax(0,1fr));grid-template-rows:auto}#app #home-screen{gap:10px;padding:8px 0 12px}#app #home-screen .home-card strong{font-size:15px}#app #home-screen .home-card{min-height:0}#app :is(#print-screen,#method-screen,#mental-setup-screen){--options-inset:8px;--options-gap:6px}#app .learning-preview{padding:10px}#app .learning-preview h3{margin-bottom:6px}#app .learning-preview-question{min-height:78px;height:78px;margin-bottom:4px}}@media screen{#app :is(#method-screen,#mental-setup-screen).setup-page>.setup-footer{display:flex;flex-direction:row;align-items:stretch;flex:none;gap:8px;width:100%}#app :is(#method-screen,#mental-setup-screen).setup-page>.setup-footer button{flex:1;min-width:0;min-height:44px}#app .learning-preview-paper[data-triple=true]{overflow:visible}}@media screen{#app>:is(#home-screen,#method-screen,#mental-setup-screen,#print-screen,#test-overview,#mental-choices-screen,#progress-screen,#result-screen,#pre-test,#check-screen){width:calc(100% - 24px)!important;max-width:none!important;margin-inline:12px!important}#app>#skill-screen{width:100%!important;max-width:none!important;margin:0!important;padding:8px 12px 12px!important;box-sizing:border-box}#app>#mental-choices-screen{padding-top:8px}#app>:is(#pre-test,#result-screen,#check-screen){height:calc(var(--app-height,100dvh) - 64px);max-height:calc(var(--app-height,100dvh) - 64px);margin-block:8px 12px;flex:0 0 auto;box-sizing:border-box}#app .learning-preview[data-question-only=true] .learning-preview-question{flex:1 1 0;height:auto;min-height:88px;margin:0}#app #print-screen .print-switch.option-row{grid-template-columns:52px minmax(0,1fr);grid-template-rows:minmax(48px,auto) auto;align-content:start;column-gap:12px;row-gap:6px;padding-inline:12px!important}#app #print-screen .print-switch.option-row::before{grid-row:1!important;min-height:48px;height:100%;margin-inline:-12px}#app #print-screen .print-switch.option-row input{grid-column:1;grid-row:1}#app #print-screen .print-switch.option-row .option-copy>span:first-child{grid-column:2;grid-row:1;text-align:left;padding:10px 0!important;font-size:15px;line-height:1.25}#app #print-screen .print-switch.option-row .option-description{display:block!important;grid-column:1/-1;grid-row:2;font-size:14px;line-height:1.35;padding:0 2px;align-self:start}#app #print-screen[data-print-kind=practice] #print-model-options{grid-template-columns:repeat(2,minmax(0,1fr))}#app #print-screen[data-print-kind=practice] #print-model-operations-option{grid-column:auto}#app #print-screen[data-print-kind=practice] #print-model-options.single-option{grid-template-columns:minmax(0,1fr)}#app #print-screen #print-content{flex:1 1 auto;overflow:auto;padding-right:0}}@media screen and (min-width:900px){#app :is(#method-screen,#mental-setup-screen).setup-page .current-method,#app #method-model-options{grid-column:1/-1}#app #method-model-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));align-items:start}}@media screen and (max-width:650px){#app #print-screen .print-switch.option-row{grid-template-columns:52px minmax(0,1fr);column-gap:10px;grid-template-rows:minmax(48px,auto) auto;min-height:0}#app #print-screen .print-switch.option-row .option-copy>span:first-child{font-size:13px}#app #print-screen .print-switch.option-row .option-description{font-size:12px}#app #home-screen .home-card .card-icon svg{max-width:30px;max-height:30px}}#app[aria-busy=true]{visibility:hidden}#app-loading{position:fixed;inset:40% 12px auto;text-align:center;color:var(--brand);font:20px/1.5 sans-serif}@media screen{#app :is(#method-screen,#mental-setup-screen).setup-page .current-method .title-qualifier{display:inline-block;white-space:nowrap}}@media screen and (min-width:651px){#app #print-selection-summary,#app #method-screen[data-lesson-guide=true] .current-method>h2{display:none!important}}@media screen and (max-width:650px){.print-preview-title-prefix{display:none}}#app :is(#home-screen [data-go=mental],#test-kind-selector)[hidden]{display:none!important}#app #home-screen .home-choices:has([data-go=mental][hidden]) [data-go=printouts]{grid-column:1/-1}@media screen and (max-height:500px) and (min-width:651px){#app #home-screen .home-choices:has([data-go=mental][hidden]){grid-template-columns:repeat(3,minmax(0,1fr))}#app #home-screen .home-choices:has([data-go=mental][hidden]) [data-go=printouts]{grid-column:auto}}