.operation-demonstration{display:grid;gap:7px;max-width:100%;margin:8px auto 0;padding:10px 12px;border:1px solid #b9cdb0;border-radius:14px;background:#fbfdf7;color:#254132}.operation-demonstration-heading{display:flex;align-items:center;justify-content:space-between;gap:10px;color:#587051;font-size:11px;font-weight:700;letter-spacing:.04em;text-transform:uppercase}.operation-demonstration-control{border:0;border-radius:999px;padding:5px 9px;background:#e3eedb;color:#36583d;font:inherit;cursor:pointer}.operation-equation,.operation-both,.operation-cancellation{min-height:25px;opacity:0;transform:translateY(-5px);transition:opacity .18s ease,transform .18s ease}.operation-equation.is-visible,.operation-both.is-visible,.operation-cancellation.is-visible{opacity:1;transform:translateY(0)}.operation-equation{overflow-wrap:anywhere;text-align:center;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:clamp(15px,4vw,20px);font-weight:700}.operation-before{color:#496352}.operation-after{color:#295f42}.operation-both{display:grid;grid-template-columns:minmax(0,1fr) 24px minmax(0,1fr);align-items:end;gap:5px;padding:4px 9px 0;color:#8a5d20;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:clamp(14px,3.7vw,18px);font-weight:800;text-align:center}.operation-whole-expression{display:inline-block;padding:3px 5px;border-bottom:2px solid #b88538;border-radius:4px}.operation-equals{color:#50655a}.operation-cancellation{display:flex;flex-wrap:wrap;justify-content:center;gap:5px 14px;min-height:19px;color:#687466;font-size:12px;text-align:center}.operation-cancelled-term{color:#9a4d3c;text-decoration:line-through 3px #b84f3d;text-decoration-skip-ink:none}.operation-demonstration-invalid{color:#803e35;font-size:13px}.operation-demonstration-invalid span{color:#765e58}@media(prefers-reduced-motion:reduce){.operation-equation,.operation-both,.operation-cancellation{transition:none}}@font-face{font-family:DM Sans;font-style:normal;font-weight:100 1000;font-display:swap;src:url(/fonts/dm-sans-variable.woff2) format("woff2")}@font-face{font-family:Manrope;font-style:normal;font-weight:200 800;font-display:swap;src:url(/fonts/manrope-variable.woff2) format("woff2")}:root{font-family:DM Sans,sans-serif;color:#263e39;background:#f6f6ef;font-synthesis:none;--ink: #263e39;--muted: #607066;--green: #245b48;--border: #d9e0d1;--paper: #fffef9;--radius: 22px}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit;color:inherit}button,a{touch-action:manipulation;-webkit-tap-highlight-color:transparent}button{cursor:pointer;border:0;background:transparent}button:disabled{opacity:.45;cursor:not-allowed}a{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,main:focus-visible{outline:3px solid #267c63;outline-offset:3px}h1,h2,h3{font-family:Manrope,sans-serif;letter-spacing:-.045em;font-weight:750;margin:0}h1{font-size:clamp(23px,2.3vw,34px);line-height:1.25}h2{font-size:25px;line-height:1.3}h3{font-size:18px;line-height:1.4}p{line-height:1.6;margin:0 0 14px}button{transition:background .15s,box-shadow .15s}button:not(:disabled):hover{filter:brightness(.96)}.icon{width:20px;height:20px;flex-shrink:0}.primary,.secondary,.quiet,.text-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 16px;border-radius:12px;font-size:14px;font-weight:650;text-decoration:none;line-height:1.35}.primary{background:var(--green);color:#fff}.secondary{background:#f3f6e9;border:1px solid #cbd6bf}.quiet{border:1px solid var(--border);background:#ffffff4d}.text-button{background:transparent;padding:8px 4px}.round{display:inline-grid;place-items:center;width:44px;height:44px;flex-shrink:0;border:1px solid var(--border);border-radius:50%;background:#fffef9}.eyebrow{display:block;font-size:10px;font-weight:650;letter-spacing:.14em;text-transform:uppercase;color:#516a58;line-height:1.5}.microcopy{font-size:12px;color:#647365;line-height:1.6}.note{background:#eef3e3;border-radius:12px;padding:14px;font-size:13px;line-height:1.6}.skip-link{position:fixed;top:-80px;left:12px;z-index:100;background:var(--green);color:#fff;padding:14px}.skip-link:focus{top:12px}.boot-screen{max-width:750px;margin:12vh auto;padding:24px}.boot-screen h1{margin:35px 0 15px}.studio{height:100dvh;min-height:0;display:grid;grid-template-rows:auto auto minmax(0,1fr) auto;max-width:1800px;margin:auto}.studio>audio{display:none}.studio-header{display:flex;align-items:center;gap:32px;padding:14px 32px;border-bottom:1px solid var(--border);background:#fcfcf6}.brand{display:flex;align-items:center;gap:10px;font-family:Manrope,sans-serif;font-size:29px;font-weight:800;letter-spacing:-1.6px;text-decoration:none}.brand-mark{width:36px;height:36px;display:grid;place-items:center;background:var(--green);color:#e6efc1;border-radius:12px;transform:rotate(-7deg)}.brand-mark .icon{width:25px;height:25px}.course-label{font-size:10px;font-weight:700;letter-spacing:.15em;border-left:1px solid var(--border);padding-left:28px}.course-label span{display:block;letter-spacing:0;font-size:12px;font-weight:400;margin-top:3px;color:var(--muted)}.header-tools{display:flex;gap:24px;align-items:center;margin-left:auto}.save-status{font-size:11px;white-space:nowrap;color:#62735d;display:flex;gap:7px;align-items:center}.save-status i{width:6px;height:6px;background:#769762;border-radius:50%}.journey{display:flex;align-items:center;gap:7px;padding:8px 32px;background:#f1f3e9;border-bottom:1px solid var(--border)}.journey>button{display:flex;align-items:center;gap:10px;font-size:13px;font-weight:650;padding:6px 14px 6px 6px;min-height:46px;border-radius:24px}.step-number{border:1px solid #c5d0b8;border-radius:50%;width:30px;height:30px;display:grid;place-items:center;font-size:11px;flex-shrink:0}.step-number .icon{width:15px;height:15px}.journey>button[aria-current]{background:#fffef9;box-shadow:0 1px 4px #263e3909}.journey>button[aria-current] .step-number{background:var(--green);color:#fff;border-color:var(--green)}.journey>button>.icon{margin-left:20px;width:13px;color:#87957d}.journey-note{margin-left:auto;font-size:12px;color:#6d7c67;font-style:italic}.learning-viewport{min-height:0;overflow:auto;overscroll-behavior:contain;padding:22px 32px 14px;display:flex;flex-direction:column;gap:18px;scrollbar-width:thin}.activity-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-shrink:0}.activity-heading .eyebrow{margin-bottom:6px}.teach-again{font-size:12px;flex-shrink:0}.welcome-stage{display:grid;grid-template-columns:1.1fr 1fr;min-height:390px;flex:1;background:var(--paper);border:1px solid var(--border);border-radius:24px;overflow:hidden}.welcome-copy{padding:clamp(25px,3vw,55px);display:flex;flex-direction:column;justify-content:center;align-items:flex-start}.lesson-chip{display:inline-flex;gap:6px;align-items:center;border:1px solid #d4debf;border-radius:30px;padding:7px 11px;font-size:11px;color:#4b6b4d;background:#f2f6e7}.lesson-chip .icon{width:14px;height:14px}.welcome-copy h2{font-size:clamp(30px,3.3vw,52px);letter-spacing:-.055em;line-height:1.1;margin:17px 0}.welcome-copy em{color:#719259;font-style:normal}.welcome-copy p{max-width:440px;color:#5d7163;font-size:14px}.welcome-invitation{font-size:13px!important}.welcome-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:10px}.welcome-art{background:radial-gradient(ellipse at 50% 38%,#f4f5d9,#e3ead3 65%,#c8d9bb);position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center;min-height:350px}.welcome-orbit{position:absolute;width:92%;aspect-ratio:1;border-radius:50%;border:1px solid #96b27e33;box-shadow:0 0 0 55px #a4ba8b0c,0 0 0 110px #a4ba8b0a;transform:scaleY(.6) rotate(-18deg)}.welcome-tutor{width:clamp(180px,23vw,330px);filter:drop-shadow(0 14px 15px #45654316);position:absolute;bottom:8%;left:12%}.floating-equation{display:flex;gap:20px;align-items:center;position:absolute;top:14%;left:10%;font-family:Manrope,sans-serif;font-size:clamp(22px,2.5vw,38px);letter-spacing:-1px;background:#fffffae0;border:1px solid #fff;padding:15px 25px;border-radius:20px;box-shadow:0 15px 30px #48673610;transform:rotate(-4deg)}.floating-equation b{color:#8da874;font-weight:400;font-size:.75em}.hello-bubble{position:absolute;top:42%;right:7%;background:#fffff9f0;border-radius:17px 17px 17px 0;border:1px solid #e2e7ce;padding:17px 19px;box-shadow:0 5px 20px #3857360c}.hello-bubble span{font-size:11px;color:#6a7e60}.hello-bubble p{font-family:Manrope;font-size:17px;font-weight:700;margin:5px 0 0}.art-label{position:absolute;bottom:6%;right:8%;font-size:11px;color:#5d7652}.teaching-stage{display:flex;flex-direction:column;min-height:335px;flex:1;border:1px solid #d5dfca;border-radius:24px;overflow:hidden;background:#e8eedb}.lesson-scene{position:relative;flex:1;min-height:260px;display:flex;flex-direction:column;justify-content:center;padding:35px 160px 20px;background:radial-gradient(ellipse at 50% 45%,#f6f7e3,#e7eed7 60%,#dce6cf)}.scene-meta{position:absolute;top:16px;left:22px;right:22px;display:flex;justify-content:space-between;color:#677c5a;font-size:9px;letter-spacing:.12em}.scene-meta span:last-child{letter-spacing:0;font-size:11px}.lesson-scene .math-world{border:0;background:transparent;overflow:visible;flex:none}.lesson-scene .world-header,.lesson-scene .world-footer{display:none}.lesson-scene .equation{font-size:clamp(32px,4vw,58px);margin:0 0 6px}.lesson-scene .token-stage{min-height:130px;padding:15px 20px 10px;max-width:720px;margin:auto}.lesson-scene .model-caption{font-size:10px;margin:7px 0 10px}.lesson-scene .legend{margin-top:10px}.lesson-scene .term-platform{max-width:280px}.before-equation{display:flex;gap:12px;align-items:center;justify-content:center;font-size:10px;color:#63785a;margin:4px 0 8px}.before-equation span{font-size:17px}.before-equation .icon{width:14px}.focus-annotation{display:flex;justify-content:center;align-items:center;gap:10px;padding:9px 16px;border:1px solid #c4d3af;border-radius:30px;background:#faffee;max-width:max-content;margin:8px auto 0;color:#416143;font-size:14px;font-weight:650;position:relative;z-index:1}.focus-annotation .icon{width:16px}.scene-tutor{position:absolute;right:14px;bottom:18px;width:148px;display:flex;align-items:center;flex-direction:column;transition:transform .7s ease-in-out;pointer-events:none}.scene-tutor>span{font-size:9px;letter-spacing:.1em;color:#5a7150;margin-top:-9px}.scene-tutor.cue-unknown{transform:translateY(-5px)}.scene-tutor.cue-equality{transform:translateY(-68px)}.scene-tutor.cue-both{transform:translateY(-26px)}.scene-tutor.cue-groups{transform:translateY(-6px)}.scene-tutor.cue-check{transform:translateY(-52px)}.scene-tutor.cue-story{transform:translateY(-12px)}.lesson-takeaway{padding:15px 24px;background:#fffef9ba;border-top:1px solid #d5dfc7;display:grid;grid-template-columns:1fr auto;gap:4px 20px;align-items:center}.lesson-takeaway .eyebrow{grid-column:1}.lesson-takeaway p{font-size:16px;font-weight:500;margin:0;grid-column:1}.lesson-takeaway button{grid-column:2;grid-row:1/3;font-size:12px}.story-labels{display:flex;justify-content:center;gap:18px;margin-top:12px;font-size:11px;color:#617353}.story-labels b{font-size:15px}.focus-unknown .equation>span:first-child,.focus-equality .equation>b,.focus-groups .equation>span:last-child,.focus-check .equation{background:#fef5c8;border-radius:10px;box-shadow:0 0 0 5px #fef5c8}.focus-both .term-platform{box-shadow:0 0 0 2px #7da16670}.focus-groups .term.constant{box-shadow:0 0 0 2px #6c905844,inset -3px -3px #9276371a}.tutor-avatar{display:block;width:100%;height:auto;overflow:visible}.tutor-avatar.small{width:66px;height:70px;flex-shrink:0}.tutor-mouth{display:none;transform-origin:91px 84px}.speaking .tutor-mouth{display:block;animation:speak .28s ease-in-out infinite alternate}.speaking .tutor-smile{display:none}.tutor-arm{transform-origin:58px 112px;transform:rotate(-7deg);transition:transform .5s}.pointing .tutor-arm{transform:rotate(17deg)}.speaking.pointing .tutor-arm{animation:explain 3.2s ease-in-out infinite}.tutor-eyes{transform-origin:90px 70px}.speaking .tutor-eyes{animation:blink 7s infinite}@keyframes speak{to{transform:scaleY(.35) scaleX(.9)}}@keyframes explain{50%{transform:rotate(5deg)}}@keyframes blink{0%,43%,47%,to{transform:scaleY(1)}45%{transform:scaleY(.12)}}.practice-stage{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(330px,.85fr);gap:20px;flex:1;min-height:355px}.practice-scene{min-width:0;display:flex;flex-direction:column;gap:10px}.math-world{border:1px solid #d4dfc7;border-radius:22px;background:radial-gradient(ellipse at 50% 55%,#f3f6e2,#e7eedb 65%,#dfe8d4);overflow:hidden;position:relative;display:flex;flex-direction:column;justify-content:center;flex:1}.world-header{display:flex;align-items:center;justify-content:space-between;padding:16px 21px 0;gap:8px}.world-tag{display:flex;align-items:center;gap:5px;font-size:10px;color:#637557}.world-tag .icon{width:13px;height:13px}.equation{display:flex;justify-content:center;align-items:center;gap:22px;font-family:Manrope,sans-serif;font-size:clamp(25px,3.1vw,45px);font-weight:650;letter-spacing:-1.6px;margin:18px 10px 8px;color:#355d47}.equation b{font-size:.65em;color:#69865b;font-weight:400}.token-stage{display:flex;align-items:center;justify-content:center;gap:18px;position:relative;padding:14px 24px 20px;min-height:165px}.orbit{position:absolute;border:1px solid #b8cba334;border-radius:50%;width:90%;height:120%;left:50%;top:48%;transform:translate(-50%,-50%) rotate(-10deg);pointer-events:none}.orbit.two{width:110%;height:110%;transform:translate(-50%,-50%) rotate(9deg)}.term-platform{position:relative;z-index:1;flex:1;align-self:stretch;display:flex;align-items:center;flex-direction:column;justify-content:flex-end;border-bottom:6px solid #b3c69b;border-radius:0 0 40% 40%;padding:0 8px 15px;background:linear-gradient(0deg,#ceddb963,transparent 65%)}.platform-label{font-size:8px;color:#5d7851;letter-spacing:.13em;margin-bottom:13px}.term-tray{display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap;max-width:330px;min-height:76px}.term-group{display:flex;gap:5px;flex-wrap:wrap;align-items:center;justify-content:center}.term-group.constant{max-width:146px;gap:4px}.term{display:grid;place-items:center;animation:arrive .28s ease-out}.term.x{width:37px;height:62px;color:#fffde8;background:linear-gradient(120deg,#81a366,#537b49);border:1px solid #527747;border-radius:8px;box-shadow:inset -5px -4px #3d61392e,3px 5px #3b5e391d;font-family:Georgia,serif;font-size:27px;font-style:italic;transform:rotate(-3deg)}.term.x:nth-child(2){transform:rotate(3deg);background:linear-gradient(130deg,#94ad6d,#6e9355)}.term.constant{width:24px;height:24px;border-radius:7px;background:linear-gradient(135deg,#e7c985,#c3a667);border:1px solid #bba15e;color:#534727;box-shadow:inset -3px -3px #9276371a,2px 3px #816d3220;font-size:10px;font-weight:700}.term.negative{background:linear-gradient(135deg,#ecb8a9,#c78073);border:1px dashed #a65c50;color:#5b2f28}.term.grouped{width:auto;min-width:55px;padding:6px 10px;display:flex;flex-direction:column;height:62px}.term.grouped small{font:9px DM Sans,sans-serif}.model-equal{font-size:26px;color:#738d63;z-index:1}.zero{font-size:30px;color:#637d59}.legend{display:flex;justify-content:center;gap:20px;font-size:11px;color:#58704e;margin-top:3px}.legend span{display:flex;gap:7px;align-items:center}.legend i{width:9px;height:9px;border-radius:3px;display:inline-block}.x-key{background:#779759}.unit-key{background:#d9bc79}.model-caption{text-align:center;font-size:10px;color:#5b7250;margin:10px 15px 14px}.world-footer{border-top:1px solid #ced9bf;background:#e2ead76e;display:flex;align-items:center;justify-content:space-between;gap:8px;padding:7px 18px;font-size:11px;color:#506a41;margin-top:auto}.world-footer .quiet{font-size:11px;min-height:36px;padding:6px 10px;border-color:#c6d4b5}.world-footer .icon{width:14px;height:14px}@keyframes arrive{0%{opacity:.5;translate:0 -5px}to{opacity:1;translate:0 0}}.task-card{min-width:0;min-height:0;border:1px solid var(--border);border-radius:22px;background:var(--paper);display:flex;flex-direction:column;overflow:hidden}.task-tabs{display:flex;gap:5px;padding:8px 12px;border-bottom:1px solid var(--border);flex-shrink:0}.task-tabs button{font-size:12px;min-height:40px;padding:9px 14px;border-radius:10px}.task-tabs button[aria-current]{background:#e9efdc;color:#315a40;font-weight:700}.task-content{padding:20px 22px;overflow:auto;scrollbar-width:thin;overscroll-behavior:contain;flex:1}.task-content h2{font-size:23px;margin:4px 0 10px}.task-content h3{font-size:17px;margin:16px 0 10px}.task-content p{font-size:13px;color:#5b6f60}.task-content .microcopy{font-size:11px;margin:12px 0}.task-content>.secondary{width:100%;margin-top:12px}.operation-form,.check-form{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:16px 0 12px}.operation-form .primary,.check-form .primary{grid-column:1/-1}.check-form label:only-of-type{grid-column:1/-1}label{font-size:12px;display:block;line-height:1.5}input,select,textarea{border:1px solid #cbd5c4;border-radius:10px;background:#fffefa;padding:11px 12px;min-height:44px;max-width:100%;width:100%;margin-top:5px}input[type=range]{padding:0;accent-color:var(--green)}textarea{resize:vertical;line-height:1.6;font-size:15px}input:disabled,select:disabled{background:#f3f5ec}.choices{display:flex;flex-direction:column;gap:8px;margin:12px 0}.choice{display:flex;align-items:center;gap:10px;padding:12px;text-align:left;border:1px solid #d5ddcc;border-radius:12px;background:#fcfcf6;font-size:13px;line-height:1.5;min-height:48px}.choice.selected{border-color:#6d9565;background:#edf4de;box-shadow:inset 0 0 0 1px #6d9565}.choice-letter{width:24px;height:24px;flex-shrink:0;border:1px solid #c7d1bb;border-radius:7px;display:grid;place-items:center;font-size:10px}.choice .icon{width:15px;margin-left:auto}.last-move{display:flex;align-items:center;gap:7px;font-size:11px;border-top:1px solid var(--border);padding-top:5px}.last-move .text-button{font-size:11px}.feedback,.check-result{padding:12px 14px;border-radius:12px;background:#fcf2db;color:#664e2d!important;font-size:13px;margin:12px 0}.check-result{display:flex;flex-direction:column;gap:6px}.check-result.correct{background:#e9f2dd;color:#35552b!important}.completion{padding:16px;background:#e9f2dd;border:1px solid #d1dfbf;border-radius:14px;margin-top:15px}.completion>.icon{vertical-align:middle;margin-right:8px}.completion p{margin-top:8px}.completion .primary{width:100%}.practice-companion{display:flex;align-items:center;gap:10px;padding:0 8px;flex-shrink:0}.practice-companion p{font-size:13px;margin:3px 0 0}.practice-companion>.round{margin-left:auto}.story-recap{display:flex;gap:8px;align-items:center;font-size:11px;color:#56704b;flex-shrink:0}.story-recap .text-button{font-size:11px;margin-left:auto}.story-recap .icon{width:16px}.rental-scene{border:1px solid #cbd8be;border-radius:22px;overflow:hidden;position:relative;background:#dae5ce;flex:1;display:flex;flex-direction:column;justify-content:flex-end;min-height:275px}.rental-caption{position:absolute;top:22px;left:24px;z-index:1}.rental-caption h2{font-size:23px;margin-top:7px}.rental-caption em{font-style:normal;color:#658151}.bike-illustration{display:block;width:100%;min-height:210px;flex:1}.price-strip{display:grid;grid-template-columns:repeat(3,1fr);background:#f5f6e9;padding:13px}.price-strip>div{display:flex;flex-direction:column;align-items:center;text-align:center;font-size:10px;color:#536b48}.price-strip>div+div{border-left:1px solid #c9d5bc}.price{font-family:Manrope;font-size:25px;font-weight:700;margin-bottom:2px}.price small{font-size:11px;font-weight:400}.lesson-footer{padding:0 32px 16px;background:#f6f6ef;z-index:3;flex-shrink:0}.teaching-navigation{display:flex;align-items:center;justify-content:center;gap:18px;padding:0 0 12px;min-height:52px}.teaching-navigation>.quiet{margin-right:auto}.teaching-navigation>.skip-explanation{margin-left:auto;font-size:12px}.beat-dots{display:flex}.beat-dots button{height:40px;width:31px;display:grid;place-items:center}.beat-dots button>span{width:7px;height:7px;border-radius:50%;background:#bcccad}.beat-dots button[aria-current]>span{background:var(--green);box-shadow:0 0 0 4px #dce7cd}.practice-footer{display:flex;align-items:center;justify-content:space-between;font-size:10px;color:#64765c;min-height:36px;padding-bottom:5px;gap:10px}.practice-footer .text-button{font-size:11px;min-height:34px}.practice-footer .icon{width:14px}.tutor-dock{display:flex;align-items:center;gap:22px;padding:6px 14px 6px 4px;background:#fffef9;border:1px solid #cfdcc3;border-radius:22px;box-shadow:0 7px 22px #39543408;min-height:76px}.dock-identity{display:flex;align-items:center;text-align:left;gap:3px;flex-shrink:0;padding:0 8px 0 0}.dock-identity .tutor-avatar{width:63px;height:66px}.dock-identity strong{font-size:14px;font-weight:750}.dock-identity strong span{font-size:9px;font-weight:500;color:#56714d;margin-left:7px;border:1px solid #d5dfc6;border-radius:5px;padding:3px 5px}.dock-identity small{display:block;margin-top:5px;font-size:11px;color:#607157;max-width:215px}.dock-caption{border-left:1px solid #dfe5d5;padding-left:22px;flex:1;font-size:12px;line-height:1.5;color:#5b7155;max-height:54px;overflow:auto;scrollbar-width:thin}.dock-controls{display:flex;gap:8px;align-items:center;margin-left:auto;flex-shrink:0}.mic-button.active{background:#e6f1d6;border-color:#76a263;color:#244d39}.notice{position:fixed;bottom:115px;left:50%;transform:translate(-50%);display:flex;align-items:center;gap:10px;max-width:min(650px,calc(100% - 30px));padding:10px 12px 10px 18px;background:#fffdf3;border:1px solid #c8d6b9;border-radius:15px;box-shadow:0 12px 35px #29432c1c;z-index:8;font-size:12px;line-height:1.5}.notice.error{border-color:#cb9b75;background:#fff5e9}.notice>.icon{width:16px}.notice .round{border:0;background:transparent;width:32px;height:32px}dialog{color:var(--ink);background:var(--paper);border:1px solid #cfd9c1;box-shadow:0 25px 100px #243e3933;border-radius:24px;padding:0}dialog::backdrop{background:#1f3b333b;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}.tutor-tray{width:min(540px,calc(100% - 30px));max-height:calc(100dvh - 36px);margin:auto 26px auto auto}.tutor-tray[open]{display:flex;flex-direction:column}.panel-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:19px 20px;flex-shrink:0;border-bottom:1px solid var(--border)}.panel-heading h2{font-size:20px;margin-top:4px}.tray-identity{display:flex;align-items:center;gap:10px}.tray-identity>.tutor-avatar{width:54px;height:56px}.tray-tabs{display:flex;padding:6px 15px;gap:4px;border-bottom:1px solid var(--border);flex-shrink:0}.tray-tabs button{font-size:11px;min-height:40px;flex:1;padding:7px 4px;border-radius:8px}.tray-tabs button[aria-current]{background:#e8efda;color:#355d3d;font-weight:700}.tray-content{padding:22px;overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;min-height:0;font-size:14px}.context-line{border-left:3px solid #b9cb9f;padding-left:12px;font-size:12px;color:#5b7351}.conversation-actions{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:10px 0 16px}.tutor-reply{border:1px solid #cbdcb6;border-radius:16px;padding:18px;background:#edf4df;margin:18px 0}.tutor-reply p{white-space:pre-wrap;margin:10px 0 0;font-size:15px;line-height:1.7}.tutor-reply .text-button{font-size:12px;margin-top:8px}.hint-inline{border-top:1px solid var(--border);padding-top:8px;margin-top:16px}.hint-inline .text-button{font-size:12px}.hint-inline p{font-size:13px}.proposal{padding:15px;background:#f5efd9;border-radius:12px;margin:15px 0}.transcript{font-size:18px;line-height:1.9;margin:20px 0}.spoken-word{background:#d4e6a8;color:#203e2d;border-radius:3px;box-shadow:0 0 0 2px #d4e6a8}.tray-footer{padding:14px 20px;border-top:1px solid var(--border);display:flex;justify-content:space-between;gap:8px;flex-shrink:0}.tray-footer .text-button{font-size:12px}.setting-row{display:flex;align-items:center;gap:20px;margin:0 0 20px;padding-bottom:18px;border-bottom:1px solid var(--border)}.setting-row strong{display:block;font-size:14px}.setting-row small{display:block;font-size:12px;color:#64765a;margin-top:5px}.setting-row input{width:22px;min-width:22px;min-height:22px;height:22px;accent-color:var(--green)}.history-list{padding-left:23px}.history-list li{padding:8px 0 14px 8px}.history-list strong{display:block;font-size:20px}.history-list span{font-size:12px;color:#607953;display:block;margin-top:5px}.record-dialog{max-width:820px;width:calc(100% - 32px);max-height:calc(100dvh - 40px);padding:24px}.record-dialog .panel-heading{padding:0 0 17px;margin-bottom:20px}.record-dialog>p{font-size:14px}.record-stages{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:20px 0}.record-stages section{padding:14px;background:#f0f4e6;border-radius:12px}.record-stages h3{font-size:15px;margin:5px 0 10px}.record-stages p,.record-stages small{font-size:11px}.record-dialog ul{font-size:13px;line-height:1.7;padding-left:20px}.record-dialog .microcopy{margin:20px 0 0;font-size:11px}@media(min-height:850px)and (min-width:1000px){.learning-viewport{padding-top:28px;gap:24px}.lesson-scene{padding-top:55px;padding-bottom:35px}.lesson-scene .token-stage{min-height:210px}.lesson-scene .term.x{width:49px;height:81px;font-size:33px}.lesson-scene .term.constant{width:30px;height:30px;font-size:12px}.lesson-scene .term-group.constant{max-width:180px}.lesson-scene .term-tray{min-height:110px}.scene-tutor{width:185px;right:35px;bottom:25px}.scene-meta{top:22px}.lesson-takeaway{padding:20px 30px}.task-content{padding:28px}.task-content h2{font-size:27px}.task-content p{font-size:14px}.task-content .choice{font-size:14px;padding:15px}.practice-stage .token-stage{min-height:200px}.welcome-copy p{font-size:16px}}@media(max-width:1100px){.studio-header{padding:11px 22px;gap:20px}.course-label{padding-left:20px}.header-tools{gap:14px}.save-status{display:none}.journey{padding:6px 22px}.journey-note{display:none}.learning-viewport{padding:19px 22px 12px;gap:15px}.lesson-footer{padding:0 22px 12px}.practice-stage{grid-template-columns:minmax(0,1fr) minmax(310px,.9fr);gap:14px}.lesson-scene{padding-left:75px;padding-right:125px}.scene-tutor{width:120px;right:2px}.dock-caption{display:none}.dock-identity{flex:1}.teaching-navigation{gap:8px}.teaching-navigation>.skip-explanation{margin-left:10px}.welcome-copy{padding:24px}.welcome-tutor{width:260px;left:0}.hello-bubble{right:5%;top:35%;padding:13px}.hello-bubble p{font-size:15px}.floating-equation{left:7%;padding:15px;font-size:28px}.practice-stage .token-stage{padding-left:12px;padding-right:12px;gap:10px}.practice-stage .term-tray{gap:6px}.practice-stage .term.x{width:30px;height:55px;font-size:24px}.practice-stage .term.constant{width:22px;height:22px}.practice-stage .term-group.constant{max-width:125px}.task-content{padding:18px}.task-content h2{font-size:21px}.task-content p{font-size:12px}.practice-companion p{font-size:11px}.practice-companion .tutor-avatar{width:52px;height:57px}}@media(max-width:760px){.teaching-stage{flex:1 0 auto}.studio-header{padding:9px 16px;gap:12px}.brand{font-size:25px;gap:8px}.brand-mark{width:31px;height:31px}.course-label{display:none}.header-tools>.quiet{min-height:40px;font-size:11px;padding:8px 11px}.journey{padding:5px 12px;gap:2px;justify-content:space-between}.journey>button{padding:5px;gap:6px;font-size:11px;flex:1;justify-content:center;border-radius:12px}.journey>button>.icon{display:none}.step-number{width:26px;height:26px;font-size:10px}.learning-viewport{padding:16px 16px 8px;gap:13px}.activity-heading h1{font-size:23px}.activity-heading .eyebrow{font-size:9px}.teach-again{font-size:10px;min-height:38px;padding:8px}.teach-again .icon{width:15px}.welcome-stage{grid-template-columns:1fr .8fr;min-height:380px}.welcome-copy h2{font-size:32px}.welcome-copy{padding:22px}.welcome-copy p{font-size:13px}.welcome-actions .primary{font-size:12px}.welcome-art{min-height:0}.welcome-tutor{width:200px;bottom:10%;left:-10px}.floating-equation{top:10%;font-size:23px;gap:12px;padding:13px}.hello-bubble{top:36%;right:12px;left:15px;padding:12px}.hello-bubble p{font-size:13px}.art-label{font-size:9px;bottom:6%;right:10px;left:10px;text-align:center}.practice-stage{grid-template-columns:1fr;min-height:0;gap:12px}.practice-scene{min-height:0;flex-shrink:0}.practice-stage .math-world{min-height:220px}.practice-stage .token-stage{min-height:105px;padding:10px 20px}.practice-stage .equation{margin:12px 10px 4px;font-size:31px}.practice-stage .world-header{padding-top:12px}.practice-stage .term-tray{min-height:60px;flex-wrap:nowrap}.practice-stage .term-platform{padding-bottom:10px}.practice-stage .platform-label{margin-bottom:8px}.practice-stage .term.constant{width:20px;height:20px}.practice-stage .term-group.constant{max-width:118px;gap:3px}.practice-stage .term.x{width:29px;height:46px;font-size:22px}.practice-stage .model-caption{margin:6px 12px 8px;font-size:9px}.practice-stage .legend{font-size:10px}.practice-companion{display:none}.task-card{overflow:visible;flex-shrink:0}.task-content{overflow:visible;padding:17px 20px}.operation-form{grid-template-columns:1fr 1fr auto;align-items:end}.operation-form .primary{grid-column:auto;font-size:12px;max-width:150px;min-height:44px}.task-content h2{font-size:23px}.task-content p{font-size:13px}.task-content>.secondary{margin-top:8px}.rental-scene{min-height:230px;max-height:260px}.bike-illustration{min-height:0}.rental-caption h2{font-size:21px}.price-strip{padding:8px}.price{font-size:22px}.lesson-footer{padding:0 12px 10px}.tutor-dock{padding:4px 8px 4px 2px;gap:4px;min-height:64px;border-radius:17px}.dock-identity .tutor-avatar{width:49px;height:53px}.dock-identity strong{font-size:12px}.dock-identity strong span{font-size:8px;padding:2px 4px;margin-left:3px}.dock-identity small{font-size:10px;max-width:160px}.dock-controls{gap:5px}.dock-controls .round{width:38px;height:38px}.dock-controls .primary{font-size:12px;padding:9px 12px;min-height:40px}.dock-controls .ask-button>.icon{display:none}.practice-footer{font-size:9px;min-height:32px}.practice-footer .text-button{font-size:10px}.teaching-navigation{padding-bottom:8px;gap:5px;flex-wrap:wrap}.teaching-navigation>.quiet{padding:7px 10px;min-height:40px;font-size:12px}.teaching-navigation>.primary{font-size:12px;min-height:40px;padding:8px 11px}.teaching-navigation>.skip-explanation{font-size:10px;padding:5px;min-height:36px;margin-left:0}.beat-dots button{width:24px;height:36px}.lesson-scene{padding:42px 80px 18px 20px;min-height:310px;justify-content:flex-start}.scene-tutor{width:95px;right:-2px;bottom:18px}.scene-tutor.cue-equality{transform:translateY(-75px)}.lesson-scene .equation{font-size:35px}.lesson-scene .token-stage{padding:12px 10px;min-height:130px;gap:12px}.lesson-scene .term.constant{width:21px;height:21px}.lesson-scene .term-group.constant{max-width:126px}.lesson-scene .term.x{width:31px;height:55px}.lesson-scene .term-tray{gap:5px}.lesson-takeaway{padding:13px 16px;gap:5px}.lesson-takeaway p{font-size:14px}.lesson-takeaway .text-button{font-size:11px}.focus-annotation{font-size:12px;gap:7px;padding:8px 12px}.scene-meta{left:15px;right:15px;font-size:8px}.scene-meta span:last-child{font-size:9px}.notice{bottom:100px;font-size:11px}.tutor-tray{margin:auto;width:calc(100% - 24px);max-height:calc(100dvh - 24px)}.record-stages{grid-template-columns:1fr}.story-recap{padding:0 5px}}@media(max-width:480px){.mode-teach{gap:10px}.rental-scene{min-height:195px;max-height:210px}.rental-caption{top:13px;left:16px}.rental-caption h2{display:none}.header-tools>.quiet span{display:none}.header-tools>.quiet{border-radius:50%;width:38px;height:38px;padding:8px}.journey>button{font-size:10px;gap:5px}.journey>button:last-of-type{max-width:43%}.activity-heading{gap:8px;align-items:flex-start}.activity-heading h1{font-size:21px}.teach-again span{max-width:55px;line-height:1.3}.teach-again{padding:6px;gap:4px;min-width:60px}.learning-viewport{padding:14px 12px 8px}.welcome-stage{display:flex;flex-direction:column-reverse;min-height:0;flex-shrink:0}.welcome-art{height:200px;min-height:200px}.welcome-copy{padding:21px}.welcome-copy h2{font-size:33px;margin:14px 0}.welcome-copy h2 br{display:none}.welcome-copy h2 br:after{content:" "}.welcome-copy h2 em{display:block}.welcome-tutor{width:165px;left:8%;bottom:-5px}.floating-equation{top:20px;left:14px;font-size:21px;padding:10px 16px}.hello-bubble{top:70px;right:14px;left:auto;max-width:150px}.hello-bubble span{font-size:9px}.hello-bubble p{font-size:12px}.art-label{bottom:15px;left:50%;font-size:8px}.welcome-copy p{font-size:14px}.welcome-invitation{font-size:12px!important}.welcome-actions{gap:5px}.welcome-actions .primary{font-size:13px}.welcome-actions .text-button{font-size:12px}.lesson-scene{padding:42px 42px 18px 12px;min-height:290px}.lesson-scene .term-tray{flex-wrap:wrap}.scene-tutor{width:76px;bottom:12px;right:-7px}.scene-tutor.cue-equality{transform:translateY(-150px)}.scene-tutor.cue-check{transform:translateY(-145px)}.scene-tutor.cue-both{transform:translateY(-105px)}.scene-tutor.cue-groups{transform:translateY(-95px)}.scene-tutor.cue-unknown{transform:translateY(-140px)}.lesson-scene .equation{font-size:31px;margin:10px 0}.scene-meta span:last-child{display:none}.lesson-scene .token-stage{padding:8px 6px;gap:7px;min-height:125px}.lesson-scene .term-platform{padding:0 2px 10px}.lesson-scene .term-group.constant{max-width:116px}.lesson-scene .term.constant{width:19px;height:19px;font-size:9px}.lesson-scene .term.x{width:29px;height:49px;font-size:23px}.lesson-scene .platform-label{font-size:7px}.focus-annotation{font-size:10px;gap:5px;padding:7px 9px}.focus-annotation .icon{width:13px}.lesson-scene .model-caption{font-size:9px}.lesson-scene .legend{font-size:9px;gap:12px}.lesson-takeaway{display:block}.lesson-takeaway p{margin-top:4px;line-height:1.5}.lesson-takeaway .text-button{min-height:34px;padding-bottom:0}.teaching-navigation{gap:0;justify-content:space-between}.teaching-navigation>.quiet{margin-right:0;padding:7px;font-size:11px}.beat-dots button{width:24px}.beat-dots button>span{width:5px;height:5px}.teaching-navigation>.primary{font-size:11px;padding:7px 9px}.teaching-navigation>.skip-explanation{flex-basis:100%;min-height:26px;padding:3px;margin-top:0}.dock-identity strong>span{display:none}.dock-identity small{max-width:108px;font-size:9px;line-height:1.3}.dock-identity .tutor-avatar{width:39px;height:47px}.dock-controls{gap:4px}.dock-controls .round{width:33px;height:36px;border-radius:10px}.dock-controls .icon{width:17px;height:17px}.dock-controls .primary{font-size:11px;padding:8px 9px;min-height:36px}.dock-identity{padding-right:1px}.dock-identity strong{font-size:11px}.tutor-dock{padding-right:6px}.operation-form{grid-template-columns:1fr 1fr}.operation-form .primary{grid-column:1/-1;max-width:none;font-size:13px}.task-content{padding:18px}.task-content h2{font-size:21px}.task-tabs button{font-size:11px;padding:8px 11px}.practice-stage .term-tray{flex-wrap:wrap}.practice-stage .term-group.constant{max-width:118px}.practice-stage .token-stage{padding:10px}.practice-stage .term.x{width:26px;height:44px}.practice-stage .world-header .eyebrow{font-size:9px}.practice-stage .world-tag{font-size:8px}.world-footer{padding:6px 12px}.story-recap{font-size:10px;gap:5px}.story-recap .text-button{font-size:10px}.story-recap>.icon{display:none}.practice-footer>span{font-size:8px}.panel-heading{padding:12px}.panel-heading h2{font-size:18px}.tray-identity{gap:5px}.tray-identity>.tutor-avatar{width:43px;height:48px}.tray-tabs{padding:5px 10px}.tray-tabs button{font-size:10px}.tray-content{padding:18px}.tray-footer{padding:12px;gap:8px}.tray-footer .primary{font-size:12px}.transcript{font-size:17px}.setting-row{gap:10px}.notice{bottom:123px;padding:8px 9px 8px 12px;font-size:10px}.record-dialog{padding:17px}.record-dialog .panel-heading h2{font-size:22px}}@media(max-height:800px)and (min-width:761px){.studio-header{padding-top:9px;padding-bottom:9px}.journey{padding-top:4px;padding-bottom:4px}.journey>button{min-height:40px}.learning-viewport{padding-top:14px;padding-bottom:8px;gap:12px}.activity-heading h1{font-size:27px}.welcome-stage{min-height:335px}.welcome-copy{padding:22px 30px}.welcome-copy h2{font-size:35px;line-height:1.15;margin:13px 0}.welcome-copy p{font-size:13px;margin-bottom:12px}.welcome-copy .lesson-chip{padding:5px 9px}.welcome-art{min-height:300px}.welcome-actions{margin-bottom:5px}.welcome-actions .primary,.welcome-actions .secondary,.welcome-actions .text-button{font-size:12px}.lesson-scene{padding:32px 140px 12px;min-height:285px;justify-content:flex-start}.lesson-scene .equation{font-size:40px;line-height:1.3}.lesson-scene .token-stage{min-height:120px;padding-top:9px;padding-bottom:8px}.lesson-scene .model-caption{margin:6px 0}.lesson-scene .legend{margin-top:4px}.lesson-scene .term-tray{min-height:65px}.lesson-scene .term.x{height:53px}.lesson-scene .platform-label{margin-bottom:9px}.focus-annotation{margin-top:5px;padding:7px 12px;font-size:12px}.lesson-takeaway{padding:10px 22px}.lesson-takeaway p{font-size:14px}.teaching-stage{min-height:345px}.lesson-footer{padding-bottom:10px}.teaching-navigation{padding-bottom:8px;min-height:48px}.tutor-dock{min-height:64px;padding-top:3px;padding-bottom:3px}.dock-identity .tutor-avatar{height:54px;width:51px}.task-content{padding-top:15px;padding-bottom:15px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}.speaking .tutor-mouth{transform:none}.scene-tutor{transition:none!important}}.animated-board,.equation-workshop{background:#fffdf6;border:1px solid #cdd8c3;border-radius:22px;overflow:hidden;min-width:0;position:relative}.board-topline{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:14px 22px;font-size:11px;letter-spacing:.13em;text-transform:uppercase;color:#516b5c;border-bottom:1px solid #e2e7d8;font-weight:650}.board-live{font-size:11px;letter-spacing:0;text-transform:none;font-weight:400}.algebra-canvas{display:block;width:100%;height:auto;max-height:410px;overflow:visible}.board-symbol{fill:#214a43;font-family:Georgia,serif;font-size:60px;font-weight:500}.board-symbol.small{font-size:36px}.tile-letter{font:italic 40px Georgia,serif;fill:#284f43}.tile-number{font:22px Georgia,serif;fill:#644f24}.board-note{font:20px DM Sans,sans-serif;fill:#53694f}.story-value{font:32px Georgia,serif;fill:#244c43}.board-pointer{pointer-events:none}.board-pointer .tutor-avatar{width:100%;height:100%;overflow:visible}.board-hit{cursor:help}.board-hit:hover{stroke:#adbe8d;stroke-width:2}.board-hit:focus{outline:none}g[role=button]:focus .board-hit{stroke:#245f52;stroke-width:3}.board-explanation{display:flex;gap:12px;align-items:center;padding:12px 22px;margin:0;min-height:48px;border-top:1px solid #e4e9dd;background:#f0f4e6;color:#345348;font-size:14px}.board-step-marker{flex:none;width:7px;height:7px;border-radius:50%;background:#809e57}.board-history{padding:8px 20px;display:flex;align-items:center;justify-content:space-between;font-size:12px;gap:12px}.narrated-preview>p{margin:0;padding:8px 15px;background:#edf3e3;font-size:11px;color:#3a654c}.builder-pointer{overflow:visible}.learning-viewport.mode-practice{gap:8px;padding-top:10px;padding-bottom:0}html,body,#root{height:100%;overflow:hidden}.practice-stage{flex:0 0 auto}.task-card>.live-conversation{margin:10px;border-radius:12px}.task-card>.task-content{flex:1}@media(min-width:761px){.equation-workshop .board-topline{padding-top:7px;padding-bottom:7px}.equation-workspace{padding-bottom:80px;min-height:205px}.equation-drop{min-height:66px}.builder-tutor{width:72px;height:72px}.builder-coaching{bottom:24px}.story-parts button{min-height:61px;padding:7px}.board-entry{padding-top:9px;padding-bottom:9px}}.teaching-stage{display:flex;flex-direction:column;min-height:0;overflow:visible;border:0;background:transparent;gap:0}.teaching-stage>.animated-board{flex:1;display:flex;flex-direction:column;min-height:310px}.teaching-stage .algebra-canvas{flex:1;min-height:225px;max-height:420px}.teaching-stage .board-topline,.teaching-stage .board-explanation{flex:none}.lesson-takeaway{border:0;background:transparent;padding:10px 4px;display:flex;align-items:center;gap:15px}.lesson-takeaway>.eyebrow{display:none}.lesson-takeaway p{margin:0;flex:1;font-size:14px}.practice-scene{min-width:0;justify-content:flex-start;gap:10px}.practice-scene>.animated-board{flex:none}.practice-companion{display:none}.board-modes{display:flex;gap:4px}.board-modes button{min-height:36px;padding:5px 13px;border-radius:8px;font-size:12px;color:#4b6352;border:0;background:transparent}.board-modes button[aria-pressed=true]{background:#e5edda;color:#234d40}.story-parts{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;padding:14px 18px 0}.story-parts button{background:#f1f4e8;border:1px solid #ced9bf;border-radius:13px;padding:11px 8px;display:flex;flex-direction:column;gap:4px;align-items:center;cursor:grab;min-height:67px}.story-parts strong{font:26px Georgia,serif;color:#2b5145}.story-parts small{font:12px DM Sans,sans-serif;margin-left:4px}.story-parts span{font-size:11px;color:#536a56}.equation-workspace{position:relative;min-height:228px;padding:18px 18px 98px;background-image:radial-gradient(#73936b24 .8px,transparent .8px);background-size:22px 22px}.equation-drop{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:4px;min-height:80px;padding:12px 9px;border:1.5px dashed #a9b991;border-radius:14px;background:#ffffff9e;position:relative;z-index:2}.board-empty{display:flex;align-items:center;flex-direction:column;gap:7px;text-align:center;color:#58705b;font-size:16px}.board-empty small{font-size:12px;line-height:1.4}.equation-piece{font:29px Georgia,serif;border:1px solid #c9d5bc;background:#eef3e3;border-radius:10px;min-width:40px;min-height:46px;padding:4px 8px;color:#214c42;cursor:grab}.equation-piece.focused,.story-parts button.focused{background:#ffedb9;border-color:#ba8c35;box-shadow:0 0 0 3px #ffedb975}.equation-piece.insertion{border-left:4px solid #376f58}.symbol-palette{display:flex;justify-content:center;gap:5px;margin:12px 0 0;position:relative;z-index:2}.symbol-palette button{min-width:38px;min-height:40px;border:1px solid #d0d7c4;border-radius:9px;background:#fffef9;font:23px Georgia,serif;color:#355947;cursor:grab}.insertion-help{position:relative;z-index:3;border:0;background:#f4eed8;padding:5px 9px;font-size:11px;border-radius:6px;margin-top:5px}.builder-pointer{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:1}.builder-tutor{position:absolute;left:4%;bottom:6px;width:87px;height:87px;pointer-events:none}.builder-tutor .tutor-avatar{width:100%;height:100%}.builder-coaching{position:absolute;bottom:26px;left:calc(4% + 94px);right:16px;font-size:13px;line-height:1.5;color:#56704f}.board-entry{padding:14px 18px 10px;background:#f0f4e7;border-top:1px solid #dce5d0}.board-entry>label{font-size:11px;text-transform:uppercase;letter-spacing:.09em;color:#536d56}.board-entry>div{display:flex;gap:8px;margin-top:7px}.board-entry input{min-width:0;flex:1;height:44px;padding:8px 12px;font-size:18px;background:#fffef9}.board-entry .primary{font-size:12px;min-height:44px;padding:8px 13px}.board-feedback{font-size:12px;line-height:1.5;margin:7px 0 0;color:#5e6f55}.board-feedback.correct{color:#225844}.sketch-canvas{display:block;touch-action:none;background:#fffefa;border:1px solid #bdcbae;border-radius:12px;width:100%;height:200px;position:relative;z-index:3;cursor:crosshair}.sketch-tools{display:flex;flex-wrap:wrap;gap:6px;position:relative;z-index:3;padding-top:7px;font-size:11px}.sketch-tools button{min-height:34px;border:1px solid #c9d5bd;background:#f7faef;border-radius:7px;padding:4px 9px}.sketch-tools span{flex-basis:100%;color:#5d7157}.live-conversation{background:#fffef8;border:1px solid #d7dfcc;border-radius:14px;padding:10px 14px;flex:none;min-width:0}.live-conversation-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.live-conversation-heading .eyebrow{font-size:10px}.live-conversation-heading .text-button{font-size:11px;min-height:26px}.heard-words{margin:5px 0;font-size:12px;color:#65745b;max-height:38px;overflow:auto}.heard-words span{font-weight:650}.live-reply{font-size:14px;line-height:1.65;white-space:pre-wrap;max-height:115px;overflow:auto;margin:7px 0;padding-right:8px}.board-question{display:flex;gap:8px;margin-top:6px}.board-question input{flex:1;min-width:0;background:#fafcf5;min-height:39px;padding:7px 12px;font-size:13px}.board-question button{padding:7px 13px;min-height:39px;font-size:12px}.inline-proposal{display:flex;align-items:center;gap:10px;font-size:13px;flex-wrap:wrap;margin:6px 0}.inline-proposal button{min-height:36px;font-size:12px;padding:6px 10px}.dock-identity{padding-left:6px}.dock-identity>span{padding:5px 0}.dock-caption{max-height:42px;overflow:hidden}.mic-button.active{box-shadow:0 0 0 4px #d5e9c9;background:#2b6450;color:#fff}.visually-hidden{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}.live-conversation:has(.board-question):not(:has(.live-conversation-heading,.heard-words,.feedback)){padding:6px 10px}.board-question{margin-top:0}@media(min-width:1100px){.practice-stage.panel-model{grid-template-columns:minmax(0,1.55fr) minmax(300px,1fr)}.practice-stage.panel-model .task-card h2{font-size:25px}.practice-stage .algebra-canvas{min-height:240px;max-height:330px}}@media(max-width:760px){.animated-board,.equation-workshop{border-radius:15px}.board-topline{padding:10px 13px;font-size:9px}.board-live{display:none}.teaching-stage .algebra-canvas{min-height:0;max-height:none}.algebra-canvas{min-height:0}.board-explanation{font-size:12px;padding:10px 13px;min-height:45px}.lesson-takeaway{align-items:flex-start;gap:10px;padding:8px 2px}.lesson-takeaway p{font-size:12px}.lesson-takeaway .text-button{font-size:11px;max-width:105px}.practice-stage{gap:12px}.story-parts{padding:10px 10px 0;gap:5px}.story-parts button{padding:9px 4px;min-height:62px}.story-parts strong{font-size:24px}.story-parts span{font-size:10px}.equation-workspace{padding:12px 10px 88px;min-height:215px}.equation-piece{min-width:34px;min-height:44px;padding:4px 6px;font-size:25px}.symbol-palette{gap:4px}.symbol-palette button{min-width:34px;min-height:40px;font-size:22px}.builder-tutor{height:78px;width:78px}.builder-coaching{font-size:11px;left:calc(4% + 85px);bottom:23px}.board-entry{padding:11px 10px}.board-entry>div{flex-wrap:wrap}.board-entry input{width:100%;flex-basis:100%}.board-entry .primary{width:100%}.live-conversation{padding:9px 10px}.live-reply{font-size:13px}.live-conversation-heading .eyebrow{font-size:9px}.board-question input{font-size:12px}.board-history,.board-history .text-button{font-size:11px}.board-symbol{font-size:49px}.tile-letter{font-size:34px}}@media(prefers-reduced-motion:reduce){.board-pointer,.builder-pointer{transition:none!important;animation:none!important}}@media(max-width:760px){.practice-stage{display:flex;flex-direction:column;flex:0 0 auto;min-height:auto}.practice-scene,.task-card{flex:0 0 auto;min-height:auto}.task-card{overflow:hidden}.task-content{overflow:visible}.teaching-stage{flex:1 0 auto}}@media(min-width:761px){.equation-workshop .board-topline{padding:5px 18px}.equation-workshop .board-modes button{min-height:32px}.equation-workshop .story-parts{padding-top:10px}.equation-workshop .story-parts button{min-height:54px;padding:6px}.equation-workshop .equation-workspace{padding:10px 18px 71px;min-height:187px}.equation-workshop .equation-drop{min-height:60px;padding:7px}.equation-workshop .symbol-palette{margin-top:7px}.equation-workshop .builder-tutor{height:66px;width:66px}.equation-workshop .builder-coaching{bottom:22px}.equation-workshop .board-entry{padding:8px 18px}.equation-workshop .board-feedback{font-size:11px;line-height:1.35}.equation-workshop .board-entry>label{font-size:10px}}
