/* One original sentence canvas: emphasis changes, words and positions stay fixed. */
:root{--subject:#7855aa;--verb:#28785f;--object:#9b5e2d;--modifier:#376fa6;--connector:#376fa6}
.role-subject{--role-color:var(--subject)}.role-verb{--role-color:var(--verb)}.role-object{--role-color:var(--object)}.role-modifier{--role-color:var(--modifier)}.role-connector{--role-color:var(--connector)}
body.lesson-view #header{padding:10px 28px;min-height:58px}
body.lesson-view .brand{font-size:22px;gap:10px}
body.lesson-view .brand img{width:29px;height:29px}
body.lesson-view .brand small{display:none}
body.lesson-view .nav{gap:24px}
body.lesson-view .nav .bi small{font-size:9px}
body.lesson-view #main{max-width:1380px;margin:0 28px;padding:10px 0 12px;min-height:0}
body.lesson-view footer{display:none}
.lesson-stack{max-width:1280px;margin:0 auto}
.lesson-topbar{display:flex;align-items:center;gap:14px;margin:0 0 7px;font-size:11px;color:var(--muted);line-height:1.5;min-height:25px}
.lesson-back{color:var(--ink);white-space:nowrap;min-height:25px;display:flex;align-items:center}
.lesson-count{margin-left:auto;white-space:nowrap;font:12px var(--serif)}
.question-card{padding:12px 19px 11px;border:1px solid var(--line);border-radius:13px;background:var(--surface);margin-bottom:12px}
.question-heading{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:9px;min-height:35px}
.question-heading h1{font:500 14px var(--sans);line-height:1.6}
.question-tools{display:flex;align-items:center;gap:8px;flex-shrink:0}
.question-heading .source-btn{min-height:35px;font-size:11px;padding:6px 11px}
.question-passage{font:17px/1.65 var(--serif);overflow-wrap:break-word;white-space:pre-line;color:var(--ink);transition:color .22s}
.question-passage.guided{color:#899198}
.sentence-part{color:inherit;transition:color .24s,background-color .24s,box-shadow .24s;box-decoration-break:clone;-webkit-box-decoration-break:clone;border-radius:2px;font-weight:400}
.question-passage.guided .sentence-part.is-active{color:var(--role-color);background:color-mix(in srgb,var(--role-color) 8%,transparent);box-shadow:inset 0 -2px color-mix(in srgb,var(--role-color) 58%,transparent)}
.sentence-part[data-part=gap]{display:inline-block;min-width:68px;text-align:center}
.question-prompt{font:13px/1.6 var(--serif);margin:9px 0 8px}
.question-choices{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}
.question-choices.long-options{grid-template-columns:repeat(2,minmax(0,1fr));gap:7px}
.question-choices .choice{margin:0;min-height:39px;padding:7px 10px;gap:8px;align-items:center;overflow-wrap:break-word;font:15px/1.5 var(--serif)}
.question-choices .choice .letter{margin-top:0;flex-basis:19px;height:19px;font-size:10px}
.question-choices.long-options .choice{align-items:flex-start;font-size:14px;line-height:1.45;padding:7px 9px}
.question-choices.long-options .choice .letter{margin-top:1px}
.choice.actor-focus .choice-text{color:#899198}
.choice.actor-focus .option-head{color:var(--subject);background:color-mix(in srgb,var(--subject) 7%,transparent);box-shadow:inset 0 -1px var(--subject);box-decoration-break:clone;-webkit-box-decoration-break:clone}
.choice.actor-focus .option-head.correct-head{color:var(--verb);box-shadow:inset 0 -2px var(--verb)}
.answer-actions{display:flex;gap:16px;align-items:center;margin-top:8px;min-height:34px}
.answer-actions>.primary{flex-shrink:0;min-height:33px;padding:6px 14px;font-size:12px;border-radius:7px}
.answer-actions .feedback{margin:0;min-height:0;font-size:11px;line-height:1.6}
.answer-actions .feedback strong{display:inline;margin-right:5px}
.solution-card{border:1px solid var(--line);border-radius:13px;background:var(--surface);overflow:hidden}
.solution-heading{display:flex;align-items:center;justify-content:space-between;padding:10px 17px 6px;gap:20px}
.solution-heading h2{font-size:13px;font-weight:500}
.role-legend{display:flex;gap:15px;font-size:10px;color:var(--muted)}
.role-legend span{color:var(--role-color)}
.solution-steps{padding:0 11px 8px;border-bottom:1px solid var(--line)}
.solution-steps .step-dots{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:5px}
.solution-steps .step-dot{display:flex;align-items:center;justify-content:center;width:100%;height:auto;min-height:39px;border:1px solid transparent;border-radius:7px;padding:7px 10px;color:var(--muted);font-size:12px;text-align:left}
.step-main{display:flex;align-items:center;gap:8px;min-width:0}
.step-main .number{font-size:12px;font-weight:500}
.step-main b{font-size:12px;font-weight:500;line-height:1.5}
.solution-steps .step-dot[aria-current=step]{border-color:color-mix(in srgb,var(--accent) 35%,var(--line));background:var(--tint);color:var(--accent)}
.solution-card .reading-stage{padding:12px 18px 13px;min-height:0;background:linear-gradient(150deg,color-mix(in srgb,var(--tint) 32%,white),var(--surface) 65%)}
.solution-card .reading-stage .teaching-copy{display:flex;align-items:center;gap:18px;justify-content:space-between;padding:0;min-height:0}
.step-text{min-width:0;flex:1}
.solution-card .reading-stage .teaching-copy h2{font-size:17px;margin:0 0 5px;line-height:1.5}
.solution-card .reading-stage .teaching-copy p{font-size:13px;line-height:1.7;max-width:none}
.reader{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:36px;border:1px solid var(--line);border-radius:8px;background:var(--surface);font-size:11px;padding:6px 10px;white-space:nowrap;flex-shrink:0;color:#56616b}
.reader>span{font-size:13px;min-width:16px;text-align:center}
.reader[aria-pressed=true]{background:var(--tint);border-color:var(--accent);color:var(--accent)}
.reader:disabled{opacity:.4}
.component-map{display:flex;align-items:stretch;justify-content:center;gap:12px;margin-top:10px;min-height:56px}
.component{border:1px solid color-mix(in srgb,var(--role-color) 23%,var(--line));border-radius:8px;background:var(--surface);padding:8px 13px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;min-width:130px;max-width:46%;color:var(--role-color)}
.component small{font:10px/1.3 var(--sans)}
.component>span{font:16px/1.35 var(--serif);text-align:center;overflow-wrap:break-word}
.component-join{align-self:center;font-size:18px;color:#99a0a4}
.speech-status{font-size:10px;color:var(--muted);height:0;overflow:hidden;text-align:right;padding:0 18px}
.speech-status:not(:empty){height:18px;line-height:18px}
.lesson-stack .next-lesson{margin-top:9px;padding-top:8px;font-size:11px;min-height:25px}
@media(min-width:1440px){body.lesson-view #main{margin-left:auto;margin-right:auto;padding-left:28px;padding-right:28px}}
@media(max-height:780px) and (min-width:900px){
 body.lesson-view #header{padding-top:6px;padding-bottom:6px;min-height:50px}
 body.lesson-view #main{padding-top:7px}
 .question-card{padding-top:9px;padding-bottom:9px}
 .question-heading{margin-bottom:6px}
 .question-passage{font-size:16px;line-height:1.6}
 .question-choices .choice{min-height:36px;padding-top:6px;padding-bottom:6px}
 .question-choices.long-options .choice{font-size:13.5px;line-height:1.4}
 .solution-card .reading-stage{padding-top:9px;padding-bottom:10px}
 .solution-card .reading-stage .teaching-copy h2{font-size:16px}
 .component-map{min-height:50px;margin-top:8px}
 .component{padding:6px 11px}
}
@media(max-width:850px){
 body.lesson-view #header{padding-left:20px;padding-right:20px}
 body.lesson-view #main{margin:0 20px;padding-top:12px}
 .question-heading{align-items:flex-start}
 .question-tools{gap:6px;flex-wrap:wrap;justify-content:flex-end}
 .question-passage{font-size:17px;line-height:1.75}
 .question-choices{grid-template-columns:repeat(2,minmax(0,1fr))}
 .question-choices.long-options{grid-template-columns:1fr}
 .question-choices.long-options .choice{font-size:15px;line-height:1.6}
 .role-legend{gap:10px}
 .component-map{gap:8px;flex-wrap:wrap}
 .component{min-width:100px;max-width:100%;flex:1}
 .component>span{font-size:15px}
 .component-join{font-size:14px}
}
@media(max-width:640px){
 body.lesson-view #header{padding:14px 20px 8px;gap:9px}
 body.lesson-view .brand{font-size:22px}
 body.lesson-view .nav{gap:10px}
 body.lesson-view .nav>a,body.lesson-view .account{font-size:11px;min-height:39px}
 .lesson-topbar{font-size:10px;margin-bottom:10px}
 .question-card{padding:14px;border-radius:11px;margin-bottom:15px}
 .question-heading{flex-wrap:wrap;gap:9px;margin-bottom:13px}
 .question-heading h1{font-size:13px;flex:1 1 100%}
 .question-tools{width:100%;justify-content:space-between;flex-wrap:nowrap;gap:4px}
 .question-tools .reader{font-size:10px;padding:6px 8px}
 .question-heading .source-btn{font-size:10px;min-height:36px;padding:5px 8px}
 .segmented button{font-size:9px;padding:6px 8px}
 .question-passage{font-size:17px;line-height:1.85}
 .question-prompt{font-size:14px;line-height:1.65;margin-top:14px;margin-bottom:12px}
 .question-choices{gap:8px}
 .question-choices .choice{font-size:15px;line-height:1.6;padding:9px;min-height:44px;align-items:flex-start}
 .question-choices .choice .letter{margin-top:3px}
 .answer-actions{align-items:flex-start;gap:10px;margin-top:12px;flex-direction:column}
 .answer-actions>.primary{min-height:38px}
 .answer-actions .feedback:empty{display:none}
 .answer-actions .feedback{font-size:11px}
 .solution-heading{padding:13px 13px 9px;gap:8px}
 .solution-heading h2{font-size:13px}
 .role-legend{gap:8px;font-size:9px}
 .solution-steps{padding:0 7px 9px}
 .solution-steps .step-dots{gap:3px}
 .solution-steps .step-dot{min-height:44px;padding:7px 3px}
 .step-main{gap:5px}.step-main b{font-size:11px}
 .solution-card .reading-stage{padding:15px 13px}
 .solution-card .reading-stage .teaching-copy{align-items:flex-start;gap:10px;flex-wrap:wrap}
 .step-text{flex:1 1 100%}
 .solution-card .reading-stage .teaching-copy h2{font-size:17px;margin-bottom:8px}
 .solution-card .reading-stage .teaching-copy p{font-size:13px;line-height:1.85}
 .reader{min-height:40px;font-size:11px}
 .component-map{margin-top:16px;gap:7px;align-items:stretch}
 .component{min-width:80px;padding:9px 8px;gap:5px}
 .component>span{font-size:14px;line-height:1.5}
 .component small{font-size:9px}
 .component-join{display:none}
 .lesson-stack .next-lesson{margin:16px 0 10px;padding-top:14px;font-size:11px}
}
@media(prefers-reduced-motion:reduce){.sentence-part,.question-passage{transition:none}}
.reader svg{width:16px;height:16px;flex:0 0 16px}

/* One teaching surface; only the decisive structure carries color and scale. */
.solution-heading{padding:13px 18px 10px;border-bottom:1px solid var(--line)}
.solution-heading h2{font-size:14px;font-weight:600}
.step-count{font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap}
.analysis-canvas{padding:14px 20px 16px}
.analysis-row{margin:0;line-height:1.75;overflow-wrap:break-word;font-size:14px;color:#879098}
.analysis-row+.analysis-row{margin-top:3px}
.analysis-label{font-size:.82em;font-family:var(--sans);font-weight:500}
.emphasis-green{color:#28785f;font-size:18px;font-weight:500}
.emphasis-blue{color:#376fa6;font-size:18px;font-weight:500}
.emphasis-context{color:#879098}
.emphasis-prose{color:#376fa6;font-size:16px;white-space:pre-line}
.emphasis-context:not(:first-child){margin-top:9px}
.emphasis-prose+.emphasis-prose{margin-top:9px}
.rule-footer{padding:0 18px 15px}
.rule-confirm{display:flex;align-items:center;gap:11px;max-width:100%;min-height:44px;padding:10px 15px;border:1px solid #c4dcd0;border-radius:9px;background:#edf5f0;color:#28785f;text-align:left;line-height:1.5;transition:background .2s,border-color .2s}
.rule-confirm:hover{background:#e4f0e9;border-color:#89b49e}
.rule-confirm:focus-visible{outline:2px solid #376fa6;outline-offset:3px}
.rule-symbol{font-size:17px;flex:0 0 18px;text-align:center}
.rule-text{font-size:13px;font-weight:500;overflow-wrap:anywhere}
.rule-action{font-size:11px;padding-left:13px;margin-left:auto;border-left:1px solid #c4dcd0;flex-shrink:0}
.rule-confirm[aria-pressed=true]{background:#f3f7f4;border-color:#d6e4db}
.understanding-actions{display:flex;align-items:stretch;flex-wrap:wrap;gap:10px}
.understanding-actions .rule-confirm{min-width:0}
.still-unclear{min-height:44px;padding:10px 16px;border:1px solid #d9dfe3;border-radius:9px;background:var(--surface);color:#667784;font-size:13px;line-height:1.5;white-space:nowrap}
.still-unclear:hover,.still-unclear[aria-expanded=true]{color:#376fa6;background:#f0f5fa;border-color:#aac2d8}
.still-unclear:focus-visible{outline:2px solid #376fa6;outline-offset:3px}
.extra-help{font-size:14px;line-height:1.8;color:#4d6579;background:#f3f6f9;border-radius:9px;padding:12px 15px;margin:11px 0 0;white-space:pre-line;overflow-wrap:break-word}
.extra-help[hidden]{display:none}
.solution-steps{padding:5px 15px;border-bottom:0}
.solution-steps .step-dots{display:flex;gap:4px}
.solution-steps .step-dot{width:30px;min-height:28px;padding:3px;font-size:11px}
.step-main b{display:none}
.solution-card .reading-stage{padding:4px 19px 12px;background:var(--surface)}
.solution-card .reading-stage .teaching-copy h2{font-size:15px;color:#376fa6;font-weight:500}
.solution-card .reading-stage .teaching-copy p{color:#727f88;font-size:12px}
.component-map{display:block;margin-top:9px;min-height:0}
.component-map .analysis-row{margin-top:2px;line-height:1.65;font-size:17px}
@media(max-height:780px) and (min-width:900px){
 .solution-heading{padding-top:9px;padding-bottom:7px}
 .analysis-canvas{padding-top:11px;padding-bottom:12px}
 .analysis-row{line-height:1.65}
 .rule-footer{padding-bottom:11px}
 .solution-card .reading-stage{padding-top:2px;padding-bottom:8px}
 .component-map .analysis-row{font-size:16px;line-height:1.5}
 .solution-card .reading-stage .teaching-copy h2{font-size:15px}
}
@media(max-width:640px){
 .solution-heading{padding:13px 14px 10px}
 .analysis-canvas{padding:14px}
 .analysis-row{font-size:14px;line-height:1.85}
 .emphasis-green,.emphasis-blue{font-size:17px}
 .emphasis-prose{font-size:16px}
 .analysis-label{font-size:.8em}
 .rule-footer{padding:0 14px 14px}
 .rule-confirm{width:100%;gap:9px;padding:10px 11px}
 .understanding-actions .rule-confirm{width:100%}
 .still-unclear{min-height:44px}
 .rule-text{font-size:13px}.rule-action{font-size:10px;padding-left:9px}
 .solution-steps .step-dot{min-height:36px;width:36px}
 .solution-card .reading-stage{padding:5px 14px 14px}
 .solution-card .reading-stage .teaching-copy h2{font-size:16px}
 .solution-card .reading-stage .teaching-copy p{font-size:13px;line-height:1.85}
 .component-map .analysis-row{font-size:17px;line-height:1.8}
}