.lesson-page{height:100vh;overflow:hidden;background:#f8fafc}.lesson-app{height:100vh;display:grid;grid-template-rows:var(--header-h) minmax(0,1fr)}.lesson-topbar{height:var(--header-h);background:linear-gradient(90deg,var(--navy-950),var(--navy-900));color:#fff;display:grid;grid-template-columns:minmax(190px,1fr) 360px minmax(250px,1fr) 44px;align-items:center;gap:24px;padding:0 26px;box-shadow:0 2px 10px rgba(5,20,44,.18);z-index:20}.lesson-topbar .header-brand{font-size:21px}.top-progress{display:grid;grid-template-columns:auto minmax(110px,1fr) 38px;align-items:center;gap:12px;font-size:12px;color:#e2e9f4}.progress-track{height:7px;border-radius:999px;background:rgba(255,255,255,.45);overflow:hidden}.progress-fill{height:100%;width:0;border-radius:inherit;background:linear-gradient(90deg,#8c5cff,#c7b5ff);transition:width .28s ease}.top-progress strong{font-size:12px}.top-context{font-size:14px;text-align:right;color:#edf2f9;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.profile-bubble{width:40px;height:40px;border-radius:50%;border:0;background:#fff;color:var(--navy-900);font-weight:850;cursor:pointer}.lesson-layout{min-height:0;display:grid;grid-template-columns:var(--journey-w) minmax(0,1fr);gap:22px;padding:20px 22px 18px}.journey-rail{min-height:0;background:#fff;border:1px solid var(--line);border-radius:20px;padding:20px 14px;display:flex;flex-direction:column;box-shadow:var(--shadow-sm);overflow:hidden}.journey-title{text-transform:uppercase;letter-spacing:.11em;font-size:11px;font-weight:850;color:#526784;padding:1px 10px 14px}.journey-nav{display:grid;gap:8px}.journey-item{width:100%;border:1px solid transparent;background:transparent;border-radius:15px;padding:12px 11px;display:grid;grid-template-columns:40px minmax(0,1fr) 27px;gap:10px;align-items:center;text-align:left;cursor:pointer;transition:.18s ease}.journey-item:hover{background:#fafbff}.journey-item.active{background:linear-gradient(90deg,#fbf9ff,var(--purple-soft));border-color:#ded2ff;box-shadow:inset 4px 0 0 var(--purple)}.journey-icon{width:38px;height:38px;border-radius:12px;background:#f6f8fc;color:var(--navy-800);display:grid;place-items:center;font-weight:850}.journey-item.active .journey-icon{background:#fff;color:var(--purple)}.journey-copy strong{display:block;font-size:14px}.journey-copy small{display:block;color:#6b7c95;font-size:11px;margin-top:4px}.journey-count{width:25px;height:25px;border:1px solid #cad4e4;border-radius:50%;display:grid;place-items:center;font-size:11px;font-weight:800;color:#4f6380}.journey-item.active .journey-count{background:var(--purple);border-color:var(--purple);color:#fff}.support-launch{margin-top:auto;border:1px solid var(--line);background:#fbfcff;border-radius:15px;padding:12px;display:flex;align-items:center;gap:11px;text-align:left;cursor:pointer}.support-launch:hover{border-color:#cbbcff}.support-icon{width:36px;height:36px;border-radius:11px;background:var(--purple-soft);color:var(--purple);display:grid;place-items:center;font-weight:900}.support-launch strong{display:block;font-size:13px}.support-launch small{display:block;color:var(--muted);font-size:11px;margin-top:3px}.learning-column{min-width:0;min-height:0;display:grid;grid-template-rows:32px minmax(0,1fr)}.lesson-breadcrumbs{display:flex;align-items:flex-start;gap:9px;font-size:12px;color:#59708f;padding:3px 6px;white-space:nowrap;overflow:hidden}.lesson-breadcrumbs strong{color:#1d2940;overflow:hidden;text-overflow:ellipsis}.teaching-workspace{min-height:0;outline:none}.scene-shell{height:100%;min-height:0;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow-sm);display:grid;grid-template-rows:auto minmax(0,1fr) auto;overflow:hidden}.scene-header{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:start;gap:18px;padding:22px 26px 14px}.scene-badge{width:44px;height:44px;border-radius:11px;background:linear-gradient(145deg,var(--purple),#7f56f7);color:#fff;font-size:22px;font-weight:900;display:grid;place-items:center;box-shadow:0 7px 15px rgba(109,63,242,.2)}.scene-kicker{text-transform:uppercase;letter-spacing:.12em;color:var(--purple);font-size:10px;font-weight:900;margin-bottom:3px}.scene-title{font-size:clamp(26px,2.3vw,34px);line-height:1.08;letter-spacing:-.035em;margin:0;color:#0b1d39}.scene-sub{font-size:14px;color:#2e486b;margin:7px 0 0;line-height:1.45}.scene-tools{display:flex;align-items:center;gap:16px}.listen-button{border:1px solid var(--line-strong);background:#fff;border-radius:10px;padding:9px 13px;font-weight:780;font-size:12px;cursor:pointer}.scene-counter{font-size:12px;font-weight:760;color:#425775;white-space:nowrap}.scene-main{min-height:0;overflow:auto;padding:8px 22px 14px}.scene-grid{height:100%;min-height:0;display:grid;grid-template-columns:minmax(320px,.72fr) minmax(520px,1.28fr);gap:18px}.teach-panel,.visual-panel,.practice-panel{border:1px solid var(--line);border-radius:16px;background:#fff;min-width:0}.teach-panel{padding:20px;display:flex;flex-direction:column;gap:14px;background:linear-gradient(180deg,#fff,#fcfdff)}.panel-label{text-transform:uppercase;letter-spacing:.1em;color:var(--teal);font-size:10px;font-weight:900}.teach-panel h3{font-size:17px;line-height:1.42;margin:0}.teach-panel p{font-size:13px;line-height:1.55;color:#344a68;margin:0}.formula-box{border:1.5px solid #a98cff;border-radius:14px;padding:16px;background:#fdfcff}.formula-row{display:flex;align-items:center;justify-content:center;gap:11px;color:#1d3151;font-family:Georgia,"Times New Roman",serif;font-size:clamp(28px,2.5vw,43px);line-height:1.1}.formula-symbol{font-style:italic}.formula-purple{color:var(--purple)}.formula-teal{color:var(--teal)}.fraction{display:inline-grid;grid-template-rows:auto 1px auto;align-items:center;text-align:center;vertical-align:middle;line-height:1}.fraction .bar{height:1.5px;background:currentColor;margin:4px 1px}.fraction .num,.fraction .den{padding:0 4px}.formula-legend{display:grid;gap:7px;margin-top:12px;font-size:12px}.legend-line{display:flex;align-items:center;gap:8px;color:#465b78}.legend-dot{width:8px;height:8px;border-radius:50%}.legend-dot.purple{background:var(--purple)}.legend-dot.teal{background:var(--teal)}.equation-box{margin-top:0}.equation-notes{display:grid;grid-template-columns:1fr 1fr;gap:8px;font-size:11px;color:#52657d;text-align:center}.equation-notes strong{font-size:13px}.word-chips{display:flex;flex-wrap:wrap;gap:6px}.word-chip{border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 9px;font-size:11px;color:#344965}.tip-card{margin-top:auto;border:1px solid #d7ebe6;background:linear-gradient(180deg,#f5fbf9,#edf8f5);border-radius:13px;padding:12px 13px;font-size:12px;line-height:1.5;color:#31584f}.tip-card strong{color:#247566}.visual-panel{position:relative;display:flex;flex-direction:column;min-height:0;padding:10px;background:linear-gradient(180deg,#fff,#fdfefe)}.math-visual{flex:1;min-height:300px;width:100%;display:block}.visual-footer-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:12px;margin-top:8px}.mini-work{border:1px solid var(--line);border-radius:12px;padding:11px 12px;background:#fff;font-size:12px;line-height:1.45;color:#324863}.mini-work strong{display:block;margin-bottom:4px}.mini-work .mathline{font-family:Georgia,"Times New Roman",serif;font-size:16px;color:#172c4a}.scene-footer{border-top:1px solid var(--line);background:#fff;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:18px;padding:12px 18px}.dots{display:flex;justify-content:center;gap:8px}.dot{width:9px;height:9px;border-radius:50%;background:#dfe5ef}.dot.active{background:var(--purple);transform:scale(1.1)}.nav-button.primary{background:linear-gradient(135deg,var(--purple),#6534e9);color:#fff;border-color:transparent;padding-inline:22px;box-shadow:0 7px 18px rgba(109,63,242,.18)}.worked-stack{display:grid;gap:9px}.worked-step{display:grid;grid-template-columns:31px minmax(0,1fr);gap:10px;align-items:start;border:1px solid var(--line);border-radius:12px;padding:10px;background:#fff}.worked-n{width:28px;height:28px;border-radius:9px;background:var(--purple-soft);color:var(--purple);display:grid;place-items:center;font-weight:850;font-size:12px}.worked-step strong{font-size:13px}.worked-step p{margin:4px 0 0;font-size:11px}.practice-panel{height:100%;display:grid;grid-template-columns:minmax(0,.8fr) minmax(440px,1.2fr);gap:18px;padding:18px}.practice-copy{padding:10px}.practice-question{font-size:22px;font-weight:820;line-height:1.4;margin-bottom:18px}.choice-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.choice{border:1px solid var(--line-strong);border-radius:12px;background:#fff;padding:12px;text-align:left;cursor:pointer;font-weight:700}.choice:hover{border-color:#bca8ff}.choice.correct{border-color:#9cdcc8;background:#f0fbf7}.choice.wrong{border-color:#efb1b7;background:#fff4f5}.feedback{margin-top:12px;border-radius:12px;background:#f5f7fb;padding:12px;color:#4b5f7a;font-size:12px;line-height:1.5}.interactive-controls{border:1px solid var(--line);border-radius:14px;padding:14px;background:#fff;display:grid;gap:14px}.control-row{display:grid;grid-template-columns:120px 1fr 54px;align-items:center;gap:10px;font-size:12px;font-weight:750}.control-row input[type=range]{accent-color:var(--purple);width:100%}.control-value{border:1px solid var(--line);border-radius:8px;padding:5px 7px;text-align:center;background:#fbfcfe}.drawer-backdrop{position:fixed;inset:0;background:rgba(6,21,44,.20);z-index:40}.support-drawer{position:fixed;top:0;right:0;height:100vh;width:min(420px,92vw);background:#fff;z-index:50;box-shadow:-18px 0 44px rgba(10,30,58,.18);transform:translateX(102%);transition:transform .22s ease;padding:22px;display:flex;flex-direction:column;gap:18px}.support-drawer.open{transform:translateX(0)}.drawer-header{display:flex;justify-content:space-between;gap:12px}.drawer-kicker{text-transform:uppercase;letter-spacing:.11em;font-size:10px;font-weight:900;color:var(--purple)}.drawer-header h2{font-size:24px;margin:5px 0 0}.icon-button{width:38px;height:38px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;font-size:22px}.drawer-actions{display:grid;gap:9px}.drawer-action{border:1px solid var(--line);border-radius:13px;background:#fff;padding:13px;text-align:left;cursor:pointer}.drawer-action:hover{border-color:#c8b6ff;background:var(--purple-wash)}.drawer-action strong{display:block}.drawer-action span{display:block;color:var(--muted);font-size:12px;margin-top:4px;line-height:1.45}.support-output{border:1px solid var(--line);background:#f8fafc;border-radius:14px;padding:15px;line-height:1.55;font-size:13px;color:#40556f}

/* Phase 2 visual mathematics engine */
.phase2-hero-visual{height:100%;min-height:0;border:1px solid var(--line);border-radius:17px;background:linear-gradient(180deg,#fff,#fbfcff);padding:6px 8px;display:flex;align-items:center;justify-content:center;overflow:hidden}.phase2-hero-visual>.math-visual,.phase2-hero-visual>.integer-story,.phase2-hero-visual>.quadratic-story,.phase2-hero-visual>.toolkit-visual{width:100%;height:100%;min-height:0}.connected-story{min-height:0;max-height:100%;filter:drop-shadow(0 4px 10px rgba(20,42,73,.03))}.story-connector{opacity:.92}.story-connector.purple{stroke:var(--purple)}.story-connector.teal{stroke:var(--teal)}.wtm-svg-label{font-family:var(--font-ui)}.visual-point{cursor:default}.visual-line,.visual-curve{vector-effect:non-scaling-stroke}.visual-kicker{display:block;text-transform:uppercase;letter-spacing:.11em;font-size:10px;font-weight:900;color:var(--teal)}.words-label{margin-bottom:7px}.micro-note{font-size:12px;line-height:1.5;color:#52657d}.toolkit-visual{display:grid;grid-template-columns:220px minmax(0,1fr);gap:14px;min-height:0}.toolkit-cards{display:grid;gap:10px;align-content:center}.toolkit-card{border:1px solid var(--line);border-radius:14px;background:#fff;padding:14px 15px;box-shadow:var(--shadow-sm)}.toolkit-card span{display:block;text-transform:uppercase;letter-spacing:.09em;font-size:9px;font-weight:900;color:#6c7c92}.toolkit-card strong{display:block;font-family:Georgia,"Times New Roman",serif;font-size:23px;margin-top:5px}.toolkit-card small{display:block;font-size:10px;color:#6c7c92;margin-top:4px}.toolkit-card.purple{border-left:4px solid var(--purple)}.toolkit-card.purple strong{color:var(--purple)}.toolkit-card.teal{border-left:4px solid var(--teal)}.toolkit-card.teal strong{color:var(--teal)}.toolkit-card.navy{border-left:4px solid var(--navy-800)}.toolkit-card.navy strong{color:var(--navy-800)}.toolkit-graph{min-width:0;display:flex;align-items:center}.toolkit-graph .math-visual{min-height:0;max-height:100%}.integer-story{display:grid;grid-template-columns:300px minmax(0,1fr);gap:16px;align-items:stretch}.integer-meaning{border:1px solid var(--line);border-radius:16px;padding:22px;background:linear-gradient(180deg,#fff,#fbfcff);display:flex;flex-direction:column;justify-content:center;gap:12px}.integer-meaning h3{font-size:24px;line-height:1.2;margin:0;color:var(--ink)}.integer-rule{display:grid;grid-template-columns:100px 1fr;gap:10px;align-items:center;border:1px solid var(--line);border-radius:12px;padding:10px;background:#fff;font-size:12px}.integer-rule strong{font-size:14px}.integer-equation{font-family:Georgia,"Times New Roman",serif;font-size:27px;border-radius:13px;background:#f7f9fc;padding:12px;text-align:center;color:var(--ink)}.integer-graph{border:1px solid var(--line);border-radius:16px;background:#fff;padding:8px;display:flex;align-items:center}.integer-graph .math-visual{min-height:0}.quadratic-story{display:grid;grid-template-columns:315px minmax(0,1fr);gap:16px;min-height:0}.quadratic-explain{border:1px solid var(--line);border-radius:16px;padding:20px;background:linear-gradient(180deg,#fff,#fbfcff);display:flex;flex-direction:column;justify-content:center;gap:10px}.quadratic-formula{font-family:Georgia,"Times New Roman",serif;font-size:30px;color:var(--ink);padding:11px 0}.feature-line{border:1px solid var(--line);border-radius:12px;padding:9px 10px;background:#fff}.feature-line strong{display:block;font-size:13px}.feature-line span{display:block;color:#61738b;font-size:10px;margin-top:3px}.quadratic-graph{border:1px solid var(--line);border-radius:16px;background:#fff;padding:7px;display:flex;min-width:0}.quadratic-graph .math-visual{min-height:0}.algebra-visual,.statistics-visual,.transformation-visual,.triangle-visual{max-height:100%}[data-reveal]{opacity:0}[data-reveal].revealed{animation:wtmReveal .34s cubic-bezier(.2,.8,.2,1) forwards;animation-delay:calc(var(--reveal-order,0) * 70ms)}[data-reveal].revealed-immediate{opacity:1}@keyframes wtmReveal{to{opacity:1}}
.connected-story-wrap,.desktop-gradient-story{width:100%;height:100%;min-height:0}.desktop-gradient-story{display:flex;align-items:center}.desktop-gradient-story>.connected-story{width:100%;height:100%;min-height:0}.mobile-gradient-story{display:none}.mobile-gradient-card{border:1px solid var(--line);border-radius:15px;background:#fff;padding:16px}.mobile-gradient-card h3{margin:4px 0 12px;font-size:20px}.mobile-gradient-formula{display:flex;align-items:center;justify-content:center;gap:12px;background:var(--purple-wash);border-radius:13px;padding:12px;font-family:Georgia,"Times New Roman",serif}.formula-m{font-size:28px;font-weight:700}.mobile-fraction{display:grid;grid-template-rows:auto 2px auto;text-align:center;font-size:24px;font-weight:800;line-height:1.15}.mobile-fraction>span:nth-child(2){background:var(--ink);margin:4px 0}.mobile-gradient-callouts{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:10px}.mobile-gradient-callouts span{border-radius:10px;padding:8px;text-align:center;font-size:12px;font-weight:800}.mobile-gradient-callouts .purple{background:#f7f2ff;color:var(--purple)}.mobile-gradient-callouts .teal{background:#edf9f7;color:var(--teal)}.mobile-gradient-result{display:grid;gap:4px;margin-top:12px;border-top:1px solid var(--line);padding-top:12px}.mobile-gradient-result strong{font-size:18px}.mobile-gradient-result span{font-family:Georgia,"Times New Roman",serif;font-size:18px;font-weight:800}.mobile-gradient-signs{display:grid;gap:5px;margin-top:12px;font-size:12px;color:#52657d}.mobile-gradient-signs strong{display:inline-block;width:18px;color:var(--purple)}.mobile-gradient-graph{border:1px solid var(--line);border-radius:15px;background:#fff;padding:5px;overflow:hidden}.mobile-gradient-graph .math-visual{min-height:0;width:100%;height:auto}