@font-face{font-family:'Baloo 2';font-style:normal;font-weight:400 800;font-display:swap;src:url('/assets/brand/baloo-2-variable.woff2') format('woff2')}
@font-face{font-family:'Inter';font-style:normal;font-weight:100 900;font-display:swap;src:url('/assets/brand/inter-variable.woff2') format('woff2')}
:root{--ink:#151515;--muted:#52554f;--paper:#fff9ee;--line:#d8d2c8;--green:#2dab65;--green-dark:#17693c;--amber:#feb02c;--tint:#fff3d6;color-scheme:light;font-family:'Inter',sans-serif;color:var(--ink);background:#fff}
*{box-sizing:border-box}body{margin:0;line-height:1.6}button,input{font:inherit;color:inherit}button{font-family:'Baloo 2',sans-serif;cursor:pointer}button:disabled{cursor:default}button,input{-webkit-tap-highlight-color:transparent}button:focus-visible,input:focus-visible{outline:3px solid var(--ink);outline-offset:4px}button,input[type=range]{touch-action:manipulation}button svg{width:20px;height:20px;flex:none}svg{max-width:100%;display:block}svg text{font-family:'Baloo 2',sans-serif}p{margin:0}h2,h3{font-family:'Baloo 2',sans-serif;font-weight:700;line-height:1.17;letter-spacing:-.02em;text-wrap:balance;margin:0}[hidden]{display:none!important}::selection{background:var(--amber)}
body[data-subject=english]{--tint:#fff0ec}body[data-subject=verbal]{--tint:#eaf5ff}body[data-subject=nvr]{--tint:#e9f6ed}
#example-content{padding:clamp(16px,4vw,30px);max-width:880px;margin:0 auto}
.example-heading{margin-bottom:20px}.example-heading h2{font-size:clamp(25px,5vw,35px);max-width:30ch}
/* The existing Walkthrough control structure, with Toku's two-font theme. */
.twPlayer{--tw-line:var(--line);--tw-green:var(--green-dark);color:var(--ink);max-width:760px;margin:0 auto}
.twTop,.twTransport,.twNav,.twBigHead{display:flex;align-items:center;justify-content:space-between;gap:12px}
.twTop{align-items:flex-start;line-height:1.4;margin-bottom:12px}.twSection{font-family:'Baloo 2',sans-serif;font-size:22px;font-weight:700;line-height:1.16;text-wrap:balance}.twCounter{font-family:'Baloo 2',sans-serif;font-weight:650;color:var(--muted);white-space:nowrap;font-size:15px;font-variant-numeric:tabular-nums;padding-top:2px}
.twTrack{display:flex;gap:5px;height:5px;margin:0 0 16px}.twTrack span{flex:1;background:#e8e5dc;border-radius:5px}.twTrack .filled{background:var(--green)}
.twStage{position:relative;background:var(--tint);border:1px solid var(--line);border-radius:16px;isolation:isolate;overflow:hidden}
.twArt{height:clamp(170px,39vw,270px);display:grid;align-items:center;justify-items:center;padding:14px;min-width:0;overflow:auto;overscroll-behavior:contain}
.twArt>svg{width:100%;height:100%;min-width:0;min-height:0}.twEvidence>div,.twEvidence>figure{width:100%;max-width:100%;margin:0 auto}.twEvidence .giTiles{display:flex;align-items:center;justify-content:center;gap:8px}.twEvidence .giTiles figure{margin:0;min-width:0;flex:1;text-align:center}.twEvidence svg{width:100%;max-height:240px}.twEvidence figcaption{font-size:13px;line-height:1.45}
.twVisualTools{display:flex;align-items:center;justify-content:flex-end;padding:3px 12px 11px;gap:10px}.twTransport{padding:0;gap:10px;flex:1;min-width:0}.twTransport input[type=range]{accent-color:var(--green-dark);min-width:45px;flex:1;height:44px;width:100%}.twPlayback,.twEnlarge{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:44px;border:1px solid var(--line);background:#fff;border-radius:12px;padding:7px 12px;flex-shrink:0;font-size:16px;font-weight:650;line-height:1.2}.twEnlarge.rrZoom{width:44px;padding:10px}.twStage[data-motion="static"] .twVisualTools{padding-top:0}
.twCaption{font-size:clamp(15px,2.6vw,17px);font-weight:450;line-height:1.65;max-width:60ch;min-height:3.3em;margin:19px 0 21px;text-wrap:pretty}
.twNav{gap:12px}.twNav button,.next-button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;border:1.5px solid var(--ink);border-radius:12px;padding:8px 18px;font-size:18px;font-weight:650;line-height:1.3;transition:transform .16s ease,box-shadow .16s ease}
.twNext,.next-button{background:var(--amber);box-shadow:0 3px 0 var(--ink)}.twBack{background:white}.twBack:disabled{opacity:.4}.twNext:hover,.next-button:hover{transform:translateY(-1px);box-shadow:0 4px 0 var(--ink)}.twNext:active,.next-button:active{transform:translateY(2px);box-shadow:none}
.twNotice:empty{display:none}.twNotice{margin-top:12px;font-size:14px}
.twDialog{padding:18px;width:min(780px,94vw);max-height:90vh;border:1.5px solid var(--ink);border-radius:18px;background:var(--paper);color:var(--ink)}.twDialog::backdrop{background:rgb(21 21 21 / 55%)}.twBigHead{margin-bottom:18px}.twBigHead strong{font-family:'Baloo 2',sans-serif;font-size:23px}.twBigHead button{min-height:44px;padding:6px 14px;border:1px solid var(--ink);border-radius:12px;background:#fff;font-size:17px}.twBigArt{overflow:auto;min-width:0}.twBigArt svg{max-width:100%;max-height:65vh;width:100%}.twBigArt .giTiles figure{margin:0}
.twEvidence [data-tw-focus]{transition:none;filter:drop-shadow(0 0 calc(var(--tw-emphasis,0)*5px) #feb02c)}
/* The reading passage stays live text instead of shrinking with an SVG canvas. */
.twStage[data-scene="pageWords"] .twArt{height:auto;min-height:220px;overflow:visible;padding:22px}
.reading-passage{width:100%;max-width:55ch;margin:0 auto;font:500 17px/1.7 'Inter',sans-serif;color:var(--ink)}
.reading-passage .passage-line{margin:0 0 10px;text-wrap:pretty}
.reading-passage .passage-line:last-child{margin-bottom:0}
.reading-passage mark{color:inherit;background:rgb(254 176 44 / calc(var(--passage-highlight,1)*.32));border-radius:4px;padding:2px 3px;box-decoration-break:clone;-webkit-box-decoration-break:clone}
.reading-passage .passage-note{margin:15px 0 0;padding-top:12px;border-top:1px solid var(--line);font-weight:650;color:var(--green-dark);text-wrap:pretty}
.twBigArt .reading-passage{font-size:19px}
@media(max-width:420px){.twStage[data-scene="pageWords"] .twArt{min-height:190px;padding:17px 14px}.reading-passage{font-size:15px;line-height:1.75}.reading-passage .passage-line{margin-bottom:9px}.twBigArt .reading-passage{font-size:17px}}
.check-top{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:15px}.check-top p{font-size:13px;color:var(--muted);white-space:nowrap}.quiet-button{min-height:44px;padding:5px 0;border:0;background:transparent;font-size:17px;font-weight:650;line-height:1.3;text-decoration:underline;text-underline-offset:4px;text-align:left}
.check-question{font-size:clamp(23px,4.3vw,29px);line-height:1.2;margin:0 0 16px;max-width:38ch}
.check-bridge{font-size:clamp(15px,2.6vw,17px);line-height:1.65;margin:0 0 20px;max-width:62ch;text-wrap:pretty}
.lesson-finish{font-size:clamp(15px,2.6vw,17px);line-height:1.7;max-width:68ch}
.lesson-finish p{text-wrap:pretty}
.finish-takeaway{margin-bottom:22px}
.finish-application{padding:0 0 23px}
.lesson-finish h3{font-size:clamp(22px,4vw,27px);margin-bottom:9px}
.finish-next{padding:22px;background:var(--tint);border:1px solid var(--line);border-radius:16px}
.finish-actions{display:flex;align-items:center;flex-wrap:wrap;gap:12px 22px;margin-top:24px}
.finish-actions button{max-width:100%;text-wrap:balance}
.check-picture,.check-solution{padding:16px;background:var(--tint);border:1px solid var(--line);border-radius:16px;margin:0 0 17px;min-width:0}.check-picture>svg,.check-solution>svg{width:100%;max-height:235px;margin:auto}.giTiles{display:flex;justify-content:center;align-items:center;gap:10px}.giTiles figure{margin:0;width:100%;min-width:0;text-align:center}.giTiles svg{width:100%;max-height:240px}.giTiles figcaption{font-size:14px;margin-top:8px}
.check-answers{display:grid;gap:9px}.check-answers button{display:flex;align-items:center;gap:12px;width:100%;min-height:52px;padding:10px 13px;background:#fff;border:1.5px solid var(--line);border-radius:12px;text-align:left;line-height:1.35;font-family:'Inter',sans-serif;font-size:15px;font-weight:550;transition:background-color .15s,border-color .15s}.check-answers button:hover:not(:disabled){border-color:var(--ink);background:var(--paper)}.check-answers button.correct{border-color:var(--green-dark);background:#ddf3e4}.check-answers button.again{border-color:#c57d0b;background:#fff3d6}.answer-letter{display:grid;place-items:center;background:var(--paper);border-radius:50%;width:28px;height:28px;flex:0 0 28px;font-family:'Baloo 2',sans-serif;font-size:18px;font-weight:700}.answer-picture{max-width:160px}
.check-feedback:empty{display:none}.check-feedback{border-radius:12px;padding:12px 15px;margin:16px 0;font-size:15px;line-height:1.65;text-wrap:pretty}.check-feedback.success{background:#ddf3e4}.check-feedback.hint{background:#fff3d6}.check-actions{display:flex;justify-content:space-between;gap:12px;align-items:center;flex-wrap:wrap;margin-top:16px}.check-actions .next-button:only-child{margin-left:auto}
.giMotionArt svg{display:block;width:100%;max-height:240px;margin:0 auto}.giMotionControls{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.giMotionControls button{min-height:44px;padding:7px 16px;background:#fff;border:1px solid var(--ink);border-radius:12px;font-size:17px}.giMotionControls label{display:flex;align-items:center;gap:8px;flex:1;font-size:12px}.giMotionControls input{min-width:50px;width:100%;accent-color:var(--green-dark);height:44px}.giMotionControls output{font-size:12px;font-variant-numeric:tabular-nums}
@media(max-width:420px){#example-content{padding:16px 13px 21px}.example-heading{margin-bottom:17px}.example-heading h2{font-size:27px}.twSection{font-size:19px}.twCounter{font-size:13px}.twCaption{font-size:15px;margin:15px 0 19px}.twArt{height:190px;padding:8px}.twVisualTools{gap:7px;padding:1px 8px 8px}.twTransport{gap:7px;padding:0}.twPlayback{padding:6px 9px;font-size:15px}.twNav button,.next-button{font-size:17px;padding:8px 13px}.check-top{gap:8px}.quiet-button{font-size:15px}.check-picture,.check-solution{padding:10px}.check-answers button{font-size:14px;gap:9px;padding:10px}.check-question{font-size:24px}.check-feedback{font-size:14px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;scroll-behavior:auto!important}.twNext:hover,.next-button:hover{transform:none}}

/* Labels stay live text. The drawing carries the shape, length or fold. */
.twStage[data-scene="lengthBars"] .twArt,.twStage[data-scene="sharedCode"] .twArt{height:auto;min-height:220px;padding:18px 16px}
.length-diagram{width:100%;max-width:600px;margin:0 auto;display:grid;gap:10px}
.length-row{padding:9px 10px 5px;border:1px solid transparent;border-radius:12px}
.length-row-focus{background:#fff;border-color:var(--line)}
.length-label{display:flex;justify-content:space-between;align-items:baseline;gap:8px 16px;flex-wrap:wrap;font:550 18px/1.25 'Baloo 2',sans-serif}
.length-answer{color:var(--green-dark)}
.length-row svg{display:block;width:100%;height:auto;max-height:70px}
.code-example{width:100%;max-width:580px;margin:auto;display:grid;gap:14px}
.code-row{display:grid;grid-template-columns:minmax(0,1.4fr) auto minmax(0,1fr);align-items:center;gap:10px;font:650 23px/1.3 'Baloo 2',sans-serif}
.code-pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px;align-items:center;text-align:center}
.code-pair span{padding:5px 3px;border-radius:5px}
.code-match{background:#ddf3e4;box-shadow:inset 0 -3px 0 #2dab65}
.code-means{font:500 13px/1.4 'Inter',sans-serif;color:var(--muted)}
.code-note{font:650 22px/1.4 'Baloo 2',sans-serif;margin:6px 0 0;padding-top:14px;border-top:1px solid var(--line);text-align:center;text-wrap:pretty}
.check-picture .length-diagram,.check-solution .length-diagram,.check-picture .code-example,.check-solution .code-example{padding:3px 0}
@media(max-width:420px){.twStage[data-scene="lengthBars"] .twArt,.twStage[data-scene="sharedCode"] .twArt{padding:13px 10px;min-height:190px}.length-row{padding:8px 4px 4px}.length-label{font-size:16px;gap:5px 10px}.length-diagram{gap:8px}.code-row{font-size:19px;gap:6px}.code-means{font-size:11px}.code-note{font-size:19px}.code-pair span{padding:5px 2px}}