:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--lw-accent:#2563eb;--lw-accent-strong:#1d4ed8;--lw-success:#16a34a;--lw-warning:#d97706;--lw-danger:#dc2626;--lw-ink:#0f172a;--lw-muted:#64748b;--lw-line:#dbe4f0;--lw-surface:#fff;--lw-soft:#f8fafc;--lw-glow:0 22px 70px #2563eb26;--lw-stroke-width:5;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}.lw-player-lab-shell{background:radial-gradient(circle at 10% 0,#2563eb1f,#0000 28%),radial-gradient(circle at 90% 8%,#7c3aed1a,#0000 30%),#f8fafc;min-height:100vh;padding-top:clamp(14px,2vw,26px)}.lw-lesson-tabs{background:#ffffffdb;border:1px solid #94a3b83d;border-radius:28px;justify-content:space-between;align-items:center;gap:20px;max-width:1320px;margin:0 auto clamp(16px,2vw,24px);padding:clamp(16px,2vw,24px);display:flex;box-shadow:0 24px 70px #0f172a1a}.lw-lesson-tabs h1{color:var(--lw-ink);margin:0;font-size:clamp(1.45rem,3vw,2.4rem);line-height:1.05}.lw-lesson-tab-list{grid-template-columns:repeat(2,minmax(180px,1fr));gap:12px;min-width:min(560px,100%);display:grid}.lw-lesson-tab-list button{color:var(--lw-ink);cursor:pointer;text-align:left;background:#fff;border:1px solid #94a3b852;border-radius:20px;gap:5px;padding:14px 16px;transition:border-color .16s,box-shadow .16s,transform .16s;display:grid}.lw-lesson-tab-list button strong{font-size:1rem}.lw-lesson-tab-list button span{color:var(--lw-muted);font-size:.82rem;line-height:1.35}.lw-lesson-tab-list button.is-active{background:linear-gradient(135deg,#eff6ff,#f5f3ff);border-color:#2563eb9e;transform:translateY(-1px);box-shadow:0 16px 36px #2563eb29}@media (width<=860px){.lw-lesson-tabs{flex-direction:column;align-items:stretch}.lw-lesson-tab-list{grid-template-columns:1fr}}.lw-triangle-visualizer,.lw-angle-sum-visualizer,.lw-fraction-visualizer,.lw-classifier,.lw-question-card,.lw-feedback-panel,.lw-hint-panel,.lw-progress-indicator,.lw-mastery-panel{box-sizing:border-box;background:radial-gradient(circle at 20% 10%, #60a5fa29, transparent 34%), var(--lw-surface);box-shadow:var(--lw-glow);color:var(--lw-ink);border:1px solid #94a3b83d;border-radius:28px;position:relative}.lw-triangle-visualizer:before,.lw-angle-sum-visualizer:before,.lw-fraction-visualizer:before,.lw-classifier:before{content:"";opacity:.82;background:linear-gradient(90deg,#2563eb,#7c3aed,#f59e0b);border-radius:999px;height:4px;position:absolute;top:14px;left:24px;right:24px}.lw-triangle-visualizer{padding:20px;overflow:hidden}.lw-visualizer-header,.lw-question-header,.lw-progress-summary{justify-content:space-between;align-items:center;gap:16px;margin-bottom:14px;padding-top:8px;display:flex}.lw-visualizer-header h3,.lw-question-card h3,.lw-feedback-panel h3,.lw-hint-panel h3,.lw-mastery-panel h3{margin:0;font-size:clamp(1.1rem,2vw,1.55rem);line-height:1.15}.lw-eyebrow{color:var(--lw-accent);letter-spacing:.12em;text-transform:uppercase;margin:0 0 4px;font-size:.72rem;font-weight:800}.lw-mode-pill{color:#1e40af;white-space:nowrap;background:linear-gradient(135deg,#e0edff,#f5f3ff);border:1px solid #2563eb38;border-radius:999px;padding:8px 12px;font-size:.78rem;font-weight:800}.lw-triangle-svg{background:radial-gradient(circle at 50% 45%,#60a5fa29,#0000 34%),linear-gradient(135deg,#ffffffe6,#eff6ffe6),#f8fbff;border:1px solid #94a3b833;border-radius:24px;width:100%;height:auto;min-height:260px;display:block;overflow:visible}.lw-board-slot-body .lw-triangle-visualizer,.lw-board-slot-body .lw-angle-sum-visualizer,.lw-board-slot-body .lw-fraction-visualizer,.lw-board-slot-body .lw-classifier,.lw-board-slot-body .lw-question-card,.lw-board-slot-body .lw-feedback-panel,.lw-board-slot-body .lw-hint-panel,.lw-board-slot-body .lw-progress-indicator,.lw-board-slot-body .lw-mastery-panel{border-radius:22px;padding:clamp(14px,1.4vw,20px);box-shadow:0 14px 42px #2563eb1a}.lw-board-slot-body .lw-triangle-svg{min-height:clamp(220px,28vw,340px)}.lw-hand-fraction-card{box-shadow:var(--lw-glow);box-sizing:border-box;color:var(--lw-ink);background:radial-gradient(circle at 18% 10%,#2563eb24,#0000 30%),#fff;border:1px solid #94a3b83d;border-radius:28px;padding:clamp(16px,2vw,22px);position:relative;overflow:hidden}.lw-hand-triangle-card{box-shadow:var(--lw-glow);box-sizing:border-box;color:var(--lw-ink);background:radial-gradient(circle at 18% 10%,#0ea5e924,#0000 30%),#fff;border:1px solid #94a3b83d;border-radius:28px;padding:clamp(16px,2vw,22px);position:relative;overflow:hidden}.lw-hand-fraction-card:before{content:"";opacity:.82;background:linear-gradient(90deg,#2563eb,#06b6d4,#f59e0b);border-radius:999px;height:4px;position:absolute;top:14px;left:24px;right:24px}.lw-hand-triangle-card:before{content:"";opacity:.82;background:linear-gradient(90deg,#0ea5e9,#2563eb,#7c3aed);border-radius:999px;height:4px;position:absolute;top:14px;left:24px;right:24px}.lw-hand-fraction-stage,.lw-hand-triangle-stage{background:#f8fafceb;border:1px solid #94a3b83d;border-radius:24px;gap:14px;min-height:220px;padding:16px;display:grid}.lw-hand-triangle-grid{grid-template-columns:repeat(3,minmax(0,1fr));align-items:stretch;gap:12px;display:grid}.lw-hand-triangle-grid article{background:#fff;border:1px solid #0ea5e938;border-radius:18px;align-items:center;min-height:104px;padding:14px;font-weight:800;display:grid}.lw-hand-mini-triangle{background:linear-gradient(135deg,#e0f2feeb,#eff6fff2);border:1px solid #0ea5e933;border-radius:18px;width:100%;min-height:132px}.lw-hand-mini-triangle polygon{fill:#2563eb29;stroke:#2563eb;stroke-width:4px}.lw-hand-mini-triangle line{stroke:#0f172a;stroke-linecap:round;stroke-width:3px}.lw-hand-mini-triangle circle{fill:#f59e0b;stroke:#fff;stroke-width:2px}.lw-hand-mini-triangle text{fill:#0f172a;font-size:11px;font-weight:900}.lw-triangle-ghost{fill:#7c3aed1f;stroke:#7c3aed;stroke-dasharray:5 5;stroke-width:3px}.lw-triangle-grid-sketch line{stroke:#94a3b873;stroke-width:1px}.lw-triangle-dashed,.lw-triangle-median,.lw-construction-arcs path{fill:none;stroke:#f97316;stroke-dasharray:6 5;stroke-linecap:round;stroke-width:3px}.lw-triangle-median{stroke:#7c3aed;stroke-dasharray:2 4}.lw-right-angle-mark{fill:none;stroke:#ef4444;stroke-width:4px}.lw-angle-sum-arcs path,.lw-exterior-angle-sketch path,.lw-mini-angle-callouts path,.lw-transform-arrow path{fill:none;stroke:#f59e0b;stroke-linecap:round;stroke-width:4px}.lw-mini-angle-callouts path{opacity:.72;stroke:#7c3aed;stroke-width:3.5px}.lw-hand-mini-triangle .lw-angle-sum-arcs.is-highlighted path,.lw-hand-mini-triangle .lw-angle-sum-arcs.is-focused path,.lw-hand-mini-triangle .lw-exterior-angle-sketch.is-highlighted path,.lw-hand-mini-triangle .lw-exterior-angle-sketch.is-focused path,.lw-hand-mini-triangle .lw-mini-angle-callouts.is-highlighted path,.lw-hand-mini-triangle .lw-mini-angle-callouts.is-focused path,.lw-hand-mini-triangle .lw-right-angle-mark.is-highlighted,.lw-hand-mini-triangle .lw-right-angle-mark.is-focused,.lw-hand-mini-triangle text.is-highlighted,.lw-hand-mini-triangle text.is-focused{filter:drop-shadow(0 0 10px #f59e0b9e);stroke:#f59e0b;stroke-width:5px}.lw-hand-mini-triangle .lw-angle-sum-arcs.is-highlighted text,.lw-hand-mini-triangle .lw-angle-sum-arcs.is-focused text,.lw-hand-mini-triangle text.is-highlighted,.lw-hand-mini-triangle text.is-focused{fill:#92400e;paint-order:stroke;stroke:#ffffffe6;stroke-width:4px}.lw-hand-mini-triangle .lw-angle-sum-arcs.is-highlighted,.lw-hand-mini-triangle .lw-angle-sum-arcs.is-focused,.lw-hand-mini-triangle .lw-exterior-angle-sketch.is-highlighted,.lw-hand-mini-triangle .lw-exterior-angle-sketch.is-focused{filter:drop-shadow(0 0 16px #f59e0b52)}.lw-exterior-angle-sketch line{stroke:#ef4444;stroke-dasharray:5 5;stroke-width:3px}.lw-perimeter-labels text,.lw-proof-badges text,.lw-scale-label{fill:#1d4ed8}.lw-inequality-bars line{stroke:#0f172a;stroke-linecap:round;stroke-width:5px}.lw-proof-badges text{paint-order:stroke;stroke:#fff;stroke-width:4px}.lw-error-mark line{stroke:#ef4444;stroke-linecap:round;stroke-width:6px}.lw-vocabulary-labels text{fill:#0369a1;paint-order:stroke;stroke:#fff;stroke-width:3px}.lw-triangle-pattern-row polygon{fill:#f59e0b2e;stroke:#f59e0b;stroke-width:2px}.lw-triangle-real-world rect{fill:#e0f2fe;stroke:#0ea5e9;stroke-width:2px}.lw-triangle-real-world path,.lw-triangle-real-world line,.lw-congruence-ticks line{fill:none;stroke:#0f172a;stroke-linecap:round;stroke-width:3px}.lw-hand-fraction-stack{place-items:center;font-weight:900;line-height:1;display:inline-grid}.lw-hand-fraction-stack em{background:currentColor;width:32px;height:2px;margin:3px 0;display:block}.lw-hand-segment-strip{grid-template-columns:repeat(var(--fraction-parts,8), minmax(0, 1fr));gap:5px;display:grid}.lw-hand-segment-strip span{color:#1e40af;background:#e0f2fe;border:1px solid #2563eb38;border-radius:10px;place-items:center;min-height:42px;font-weight:800;display:grid}.lw-hand-segment-strip span.is-filled{color:#fff;background:#2563eb}.lw-fraction-concept-visual{background:linear-gradient(135deg,#eff6ff,#fff);border:1px solid #2563eb2e;border-radius:20px;min-height:118px;padding:14px}.lw-fraction-visual-grid{grid-template-columns:repeat(4,1fr);gap:6px;display:grid}.lw-fraction-visual-grid span{background:#dbeafe;border:1px solid #2563eb29;border-radius:10px;min-height:28px}.lw-fraction-visual-grid span.is-filled{background:#2563eb}.lw-fraction-visual-grid span.is-overlap{background:#f59e0b}.lw-fraction-visual-grid span.is-removed{background:repeating-linear-gradient(135deg,#fee2e2,#fee2e2 5px,#fecaca 5px 10px)}.lw-fraction-visual-grid strong,.lw-fraction-visual-line,.lw-fraction-visual-balance,.lw-fraction-visual-groups,.lw-fraction-visual-wholes,.lw-fraction-visual-ladder,.lw-fraction-visual-story,.lw-fraction-visual-error,.lw-fraction-visual-cards{flex-wrap:wrap;justify-content:center;align-items:center;gap:10px;display:flex}.lw-fraction-visual-grid strong{grid-column:1/-1}.lw-fraction-visual-line{background:linear-gradient(90deg,#0000 5%,#2563eb52 5% 95%,#0000 95%);justify-content:space-between;min-height:88px}.lw-fraction-visual-line i,.lw-fraction-visual-line strong,.lw-fraction-visual-groups span,.lw-fraction-visual-wholes span,.lw-fraction-visual-wholes i,.lw-fraction-visual-ladder span,.lw-fraction-visual-ladder strong,.lw-fraction-visual-story span,.lw-fraction-visual-story i,.lw-fraction-visual-story strong,.lw-fraction-visual-cards span{background:#fff;border:1px solid #94a3b840;border-radius:14px;padding:10px 12px;font-weight:900}.lw-fraction-visual-balance{min-height:88px}.lw-fraction-visual-balance i{background:#0f172a;border-radius:999px;width:96px;height:6px;position:relative}.lw-fraction-visual-balance i:after{content:"";background:#0f172a;width:6px;height:32px;position:absolute;bottom:-32px;left:45px}.lw-fraction-visual-error span{color:#b91c1c;text-decoration:line-through}.lw-fraction-visual-error strong,.lw-fraction-visual-ladder i,.lw-fraction-visual-groups strong{color:#92400e;background:#fef3c7;border-radius:999px;padding:8px 12px;font-weight:900}.lw-hand-fraction-note,.lw-equivalent-transformer,.lw-common-denominator-board,.lw-fraction-balance,.lw-fraction-tile-equation,.lw-fraction-takeaway,.lw-fraction-groups,.lw-mixed-number-bridge,.lw-improper-converter,.lw-factor-ladder,.lw-benchmark-meter,.lw-fraction-story-scene,.lw-fraction-error-clinic,.lw-recipe-scaling-board,.lw-fraction-vocab-studio,.lw-fraction-diagnostic{grid-template-columns:repeat(3,minmax(0,1fr));align-items:center;gap:12px;display:grid}.lw-hand-fraction-note,.lw-common-denominator-board article,.lw-fraction-balance article,.lw-mixed-number-bridge div,.lw-factor-ladder div,.lw-fraction-story-scene article,.lw-recipe-scaling-board article,.lw-fraction-vocab-studio article,.lw-fraction-diagnostic article{background:#fff;border:1px solid #94a3b847;border-radius:18px;padding:14px}.lw-fraction-navigation-line,.lw-benchmark-meter{background:linear-gradient(90deg,#0000 4%,#2563eb2e 4% 96%,#0000 96%);justify-content:space-between;align-items:center;gap:18px;min-height:120px;display:flex}.lw-fraction-navigation-line strong,.lw-benchmark-meter i{color:#fff;background:#2563eb;border-radius:999px;padding:10px 14px}.lw-fraction-area-grid span{background:#dbeafe;border-radius:8px;min-height:40px}.lw-fraction-area-grid span.is-shaded{background:#93c5fd}.lw-fraction-area-grid span.is-overlap{background:#f59e0b}.lw-fraction-pattern-table{border-collapse:separate;border-spacing:8px;width:100%}.lw-fraction-pattern-table td{text-align:center;background:#fff;border:1px solid #94a3b847;border-radius:12px;padding:12px;font-weight:800}.lw-hand-fraction-card .is-highlighted,.lw-hand-fraction-card [data-target-id].is-highlighted,.lw-hand-triangle-card .is-highlighted,.lw-hand-triangle-card [data-target-id].is-highlighted{filter:drop-shadow(0 0 12px #2563eb3d);outline-offset:3px;border-color:#2563eb9e;outline:2px solid #2563eb61}.lw-hand-fraction-card .is-focused,.lw-hand-triangle-card .is-focused{transform:translateY(-2px)}.lw-hand-mini-triangle .is-highlighted,.lw-hand-mini-triangle [data-target-id].is-highlighted,.lw-hand-mini-triangle .is-focused,.lw-hand-mini-triangle [data-target-id].is-focused{border-color:#0000;outline:none;transform:none}@media (width<=860px){.lw-hand-triangle-grid,.lw-hand-fraction-note,.lw-equivalent-transformer,.lw-common-denominator-board,.lw-fraction-balance,.lw-fraction-tile-equation,.lw-fraction-takeaway,.lw-fraction-groups,.lw-mixed-number-bridge,.lw-improper-converter,.lw-factor-ladder,.lw-benchmark-meter,.lw-fraction-story-scene,.lw-fraction-error-clinic,.lw-recipe-scaling-board,.lw-fraction-vocab-studio,.lw-fraction-diagnostic{grid-template-columns:1fr}}.lw-topic-specific-card{box-shadow:var(--lw-glow);box-sizing:border-box;color:var(--lw-ink);background:radial-gradient(circle at 20% 8%,#2563eb1f,#0000 30%),#fff;border:1px solid #94a3b83d;border-radius:28px;padding:clamp(16px,2vw,22px);position:relative;overflow:hidden}.lw-topic-specific-card:before{content:"";opacity:.82;background:linear-gradient(90deg,#1d4ed8,#0891b2,#16a34a);border-radius:999px;height:4px;position:absolute;top:14px;left:24px;right:24px}.lw-topic-specific-subtitle{color:var(--lw-muted);max-width:62ch;margin:6px 0 0;font-size:.88rem;line-height:1.45}.lw-topic-specific-stage{background:linear-gradient(135deg,#eff6ffe6,#fffffff0);border:1px solid #94a3b83d;border-radius:24px;grid-template-columns:repeat(3,minmax(0,1fr));align-items:stretch;gap:12px;margin-bottom:14px;padding:14px;display:grid}.lw-topic-specific-model,.lw-topic-specific-rule,.lw-topic-specific-example,.lw-topic-specific-support-grid>div{background:#ffffffdb;border:1px solid #94a3b842;border-radius:18px;gap:6px;min-height:86px;padding:14px;transition:border-color .18s,filter .18s,transform .18s;display:grid}.lw-topic-specific-model span,.lw-topic-specific-rule span,.lw-topic-specific-example span,.lw-topic-specific-support-grid span{color:#1d4ed8;letter-spacing:.11em;text-transform:uppercase;font-size:.72rem;font-weight:900}.lw-topic-specific-model strong,.lw-topic-specific-rule strong,.lw-topic-specific-example strong,.lw-topic-specific-support-grid strong{color:var(--lw-ink);font-size:.92rem;line-height:1.35}.lw-topic-specific-support-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;display:grid}.lw-topic-specific-card .is-highlighted,.lw-topic-specific-card [data-target-id].is-highlighted{filter:drop-shadow(0 0 12px #2563eb38);outline-offset:3px;border-color:#2563eb99;outline:2px solid #2563eb61}.lw-topic-specific-card .is-focused{transform:translateY(-2px)}@media (width<=860px){.lw-topic-specific-stage,.lw-topic-specific-support-grid{grid-template-columns:1fr}}.lw-toolkit-card{background:radial-gradient(circle at 14% 8%, color-mix(in srgb, var(--lw-toolkit-accent,#2563eb) 18%, transparent), transparent 32%), linear-gradient(135deg, #fffffff5, #f8fafcf0);box-shadow:var(--lw-glow);box-sizing:border-box;color:var(--lw-ink);border:1px solid #94a3b83d;border-radius:28px;padding:clamp(16px,2vw,22px);position:relative;overflow:hidden}.lw-toolkit-card:before{background:linear-gradient(90deg, var(--lw-toolkit-accent,#2563eb), #7c3aed, #f59e0b);content:"";opacity:.82;border-radius:999px;height:4px;position:absolute;top:14px;left:24px;right:24px}.lw-toolkit-subtitle{color:var(--lw-muted);max-width:62ch;margin:6px 0 0;font-size:.88rem;line-height:1.45}.lw-toolkit-svg{width:100%;min-height:180px;margin:4px 0 16px;display:block}.lw-toolkit-stage-bg{fill:#ffffffd1;stroke:#94a3b847}.lw-toolkit-orbit{fill:color-mix(in srgb, var(--lw-toolkit-accent,#2563eb) 20%, #fff);stroke:var(--lw-toolkit-accent,#2563eb);stroke-width:4px}.lw-toolkit-connector,.lw-toolkit-action-path{fill:none;stroke:var(--lw-toolkit-accent,#2563eb);stroke-linecap:round;stroke-width:5px}.lw-toolkit-block{fill:color-mix(in srgb, var(--lw-toolkit-accent,#2563eb) 16%, #fff);stroke:color-mix(in srgb, var(--lw-toolkit-accent,#2563eb) 70%, #0f172a);stroke-width:3px}.lw-toolkit-svg-label{fill:var(--lw-ink);font-size:24px;font-weight:900}.lw-toolkit-topic-label{fill:var(--lw-muted);letter-spacing:.02em;font-size:15px;font-weight:800}.lw-toolkit-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.lw-toolkit-panel{background:#ffffffd6;border:1px solid #94a3b842;border-radius:18px;gap:5px;min-height:74px;padding:14px;transition:border-color .18s,box-shadow .18s,transform .18s;display:grid}.lw-toolkit-panel span{color:var(--lw-toolkit-accent,#2563eb);letter-spacing:.11em;text-transform:uppercase;font-size:.72rem;font-weight:900}.lw-toolkit-panel strong{color:var(--lw-ink);font-size:.92rem;line-height:1.35}.lw-toolkit-chip-row{flex-wrap:wrap;gap:8px;margin:14px 0 0;padding:0;list-style:none;display:flex}.lw-toolkit-chip-row li{background:color-mix(in srgb, var(--lw-toolkit-accent,#2563eb) 10%, #fff);border:1px solid color-mix(in srgb, var(--lw-toolkit-accent,#2563eb) 22%, transparent);color:color-mix(in srgb, var(--lw-toolkit-accent,#2563eb) 72%, #0f172a);border-radius:999px;padding:7px 10px;font-size:.78rem;font-weight:800}.lw-toolkit-card .is-highlighted,.lw-toolkit-card [data-target-id].is-highlighted{filter:drop-shadow(0 0 12px color-mix(in srgb, var(--lw-toolkit-accent,#2563eb) 54%, transparent));outline:2px solid color-mix(in srgb, var(--lw-toolkit-accent,#2563eb) 58%, transparent);outline-offset:3px}.lw-toolkit-card .is-focused{transform:translateY(-2px)}@media (width<=760px){.lw-toolkit-grid{grid-template-columns:1fr}}.lw-grid-line{fill:none;stroke:#2563eb1a;stroke-width:1px}.lw-triangle-fill{fill:#60a5fa2e;stroke:#2563eb47;stroke-width:2px}.lw-side-hit-area{cursor:pointer;opacity:0;stroke:#0000;stroke-linecap:round;stroke-width:28px}.lw-side-line{fill:none;stroke:#1e40af;stroke-linecap:round;stroke-linejoin:round;stroke-width:var(--lw-stroke-width);transition:stroke .18s,stroke-width .18s,filter .18s}.lw-angle-arc{fill:none;stroke:#6d28d9;stroke-linecap:round;stroke-width:4px;transition:filter .18s,stroke .18s}.lw-angle-wedge-fill{fill:#7c3aed1a;pointer-events:none;stroke:none;transition:fill .18s,filter .18s,opacity .18s}.lw-vertex-dot{fill:#1e293b;stroke:#fff;stroke-width:4px;transition:fill .18s,r .18s,filter .18s}.lw-side-label,.lw-angle-label,.lw-vertex-label,.lw-measurement-label{fill:#0f172a;paint-order:stroke;pointer-events:none;stroke:#ffffffdb;stroke-linejoin:round;stroke-width:5px;font-size:18px;font-weight:800}.lw-measurement-label{fill:#475569;font-size:15px;font-weight:700}.lw-target.is-highlighted .lw-side-line,.lw-target.is-focused .lw-side-line{filter:drop-shadow(0 0 14px #f59e0be6);stroke:#f59e0b;stroke-width:calc(var(--lw-stroke-width) + 3)}.lw-target.is-highlighted .lw-angle-arc,.lw-target.is-focused .lw-angle-arc{filter:drop-shadow(0 0 10px #f59e0b8c);stroke:#f59e0b;stroke-width:7px}.lw-target.is-highlighted .lw-angle-wedge-fill,.lw-target.is-focused .lw-angle-wedge-fill{fill:#f59e0b52;filter:drop-shadow(0 0 18px #f59e0b57)}.lw-target.is-highlighted .lw-vertex-dot,.lw-target.is-focused .lw-vertex-dot{fill:#f59e0b;filter:drop-shadow(0 0 13px #f59e0bd1)}.lw-triangle-pool-card .is-highlighted,.lw-triangle-pool-card .is-focused{border-color:#f59e0b;box-shadow:0 0 0 4px #f59e0b29,0 16px 34px #f59e0b29}.lw-triangle-pool-card .is-pulsing{animation:1.2s ease-in-out infinite lwPulse}.lw-target.is-selected .lw-side-line,.lw-target.is-selected .lw-angle-arc{stroke:#0891b2}.lw-target.is-selected .lw-vertex-dot{fill:#0891b2}.lw-target.is-correct .lw-side-line,.lw-target.is-correct .lw-angle-arc{stroke:var(--lw-success)}.lw-target.is-correct .lw-vertex-dot{fill:var(--lw-success)}.lw-target.is-incorrect .lw-side-line,.lw-target.is-incorrect .lw-angle-arc{stroke:var(--lw-danger)}.lw-target.is-incorrect .lw-vertex-dot{fill:var(--lw-danger)}.lw-target.is-disabled,.lw-target.is-locked{cursor:not-allowed;opacity:.48}.lw-target.is-hidden{opacity:0;pointer-events:none}.lw-target.is-pulsing{animation:1.2s ease-in-out infinite lwPulse}@keyframes lwPulse{0%,to{filter:drop-shadow(0 0 #2563eb00);transform:scale(1)}50%{filter:drop-shadow(0 0 14px #2563eb80);transform:scale(1.012)}}.lw-compass circle{fill:#ffffffd9;stroke:#94a3b8;stroke-width:2px}.lw-compass path{fill:#60a5fa}.lw-compass text{fill:#64748b;text-transform:uppercase;font-size:12px;font-weight:700}.lw-angle-sum-card,.lw-angle-equation,.lw-angle-result{color:#172554;background:radial-gradient(circle at 20% 15%,#facc152e,#0000 30%),linear-gradient(135deg,#eff6ff,#eef2ff);border:1px solid #bfdbfe;border-radius:18px;flex-wrap:wrap;justify-content:center;align-items:center;gap:10px;margin-top:16px;padding:14px;font-size:clamp(1rem,2.4vw,1.6rem);font-weight:800;display:flex;position:relative}.lw-angle-sum-visualizer,.lw-classifier,.lw-question-card,.lw-feedback-panel,.lw-hint-panel,.lw-progress-indicator,.lw-mastery-panel{padding:22px}.lw-angle-line{border:1px solid var(--lw-line);background:linear-gradient(#ffffffeb,#f8fafcf5),#f8fafc;border-radius:22px;align-items:stretch;min-height:120px;display:flex;overflow:hidden}.lw-angle-wedge{flex:var(--wedge-flex);background:linear-gradient(135deg,#dbeafe,#ede9fe);border-right:2px solid #fff;flex-direction:column;justify-content:center;align-items:center;min-width:80px;display:flex;position:relative}.lw-angle-wedge.is-highlighted,.lw-angle-equation .is-highlighted{color:#b45309;filter:drop-shadow(0 8px 20px #f59e0b61);outline-offset:-3px;outline:3px solid #facc15a6}.lw-angle-wedge em{z-index:1;position:absolute;top:44%;right:-8px}.lw-angle-result{color:#14532d;background:#ecfdf5;border-color:#bbf7d0}.lw-type-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;display:grid}.lw-type-card,.lw-comparison-chip,.lw-option-list button,.lw-question-actions button,.lw-panel-actions button,.lw-tutor-actions button,.lw-tutor-voice-controls button,.lw-progress-steps button,.lw-mastery-panel button{border:1px solid var(--lw-line);cursor:pointer;font:inherit;border-radius:16px;transition:border-color .16s,box-shadow .16s,transform .16s}.lw-type-card{text-align:left;background:radial-gradient(circle at 15% 0,#60a5fa21,#0000 28%),#fff;min-height:118px;padding:16px}.lw-type-card:hover,.lw-option-list button:hover,.lw-comparison-chip:hover{border-color:#93c5fd;transform:translateY(-1px);box-shadow:0 12px 32px #2563eb1f}.lw-type-card>strong{text-transform:capitalize;margin-top:8px;font-size:1.05rem;display:block}.lw-type-card>span,.lw-comparison-chip small{color:var(--lw-muted);display:block}.lw-type-card.is-selected,.lw-type-card.is-highlighted{border-color:var(--lw-accent);transform:translateY(-2px);box-shadow:0 0 0 4px #2563eb1f,0 18px 40px #2563eb29}.lw-type-card.is-correct{border-color:var(--lw-success)}.lw-type-card.is-incorrect{border-color:var(--lw-danger)}.lw-triangle-pool-card{color:var(--lw-ink);background:radial-gradient(circle at 12% 10%,#60a5fa29,#0000 32%),#fff;border:1px solid #94a3b83d;border-radius:24px;padding:clamp(16px,1.6vw,22px);box-shadow:0 14px 42px #2563eb1a}.lw-geometry-card{color:var(--lw-ink);background:radial-gradient(circle at 14% 10%,#60a5fa29,#0000 32%),linear-gradient(135deg,#fff,#f8fbff);border:1px solid #94a3b83d;border-radius:24px;padding:clamp(16px,1.6vw,22px);box-shadow:0 14px 42px #2563eb1a}.lw-geometry-stage,.lw-angle-explorer-stage{background:linear-gradient(135deg,#eff6ff,#fff);border:1px solid #2563eb29;border-radius:22px;overflow:hidden}.lw-geometry-stage svg,.lw-coordinate-grid,.lw-angle-explorer-stage svg{width:100%;display:block}.lw-geometry-shape{fill:#60a5fa2e;stroke:#1d4ed8;stroke-width:4px}.lw-geometry-shape.is-circle{fill:#7c3aed29;stroke:#7c3aed}.lw-geometry-shape.is-polygon,.lw-geometry-shape.is-composite{fill:#f59e0b2e;stroke:#f59e0b}.lw-geometry-stage line,.lw-geometry-stage text,.lw-coordinate-grid text,.lw-angle-explorer-stage text{fill:#0f172a;paint-order:stroke;stroke:#ffffffe6;stroke-width:4px;font-size:13px;font-weight:900}.lw-geometry-stage line{stroke:#f59e0b;stroke-dasharray:6 5;stroke-linecap:round;stroke-width:4px}.lw-geometry-formula-grid,.lw-angle-pair-panel{grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:12px;margin-top:14px;display:grid}.lw-geometry-formula-grid article,.lw-angle-pair-panel article,.lw-angle-type-grid article{background:#f8fafc;border:1px solid #94a3b83d;border-radius:18px;gap:7px;padding:13px;display:grid}.lw-geometry-formula-grid span,.lw-angle-pair-panel span{color:#64748b;letter-spacing:.1em;text-transform:uppercase;font-size:.74rem;font-weight:900}.lw-geometry-formula-grid strong,.lw-angle-pair-panel strong{color:#1e40af}.lw-geometry-formula-grid em,.lw-angle-pair-panel em{color:#475569;font-style:normal;font-weight:800}.lw-coordinate-grid{background:#fff;border:1px solid #2563eb29;border-radius:22px}.lw-coordinate-grid-line{stroke:#2563eb1f;stroke-width:1px}.lw-coordinate-axis{stroke:#1d4ed8;stroke-linecap:round;stroke-width:3px}.lw-coordinate-origin,.lw-coordinate-point{fill:var(--point-color,#2563eb);stroke:#fff;stroke-width:4px}.lw-coordinate-grid rect[data-target-id^=quadrant]{fill:#0000;stroke:#0000}.lw-coordinate-grid line[data-target-id$=-x],.lw-coordinate-grid line[data-target-id$=-y]{stroke:#f59e0b;stroke-dasharray:5 5;stroke-width:2px}.lw-angle-protractor,.lw-angle-explorer-arc{fill:none;stroke:#7c3aed;stroke-linecap:round;stroke-width:5px}.lw-angle-protractor{opacity:.35;stroke-dasharray:5 5}.lw-angle-ray{stroke:#1d4ed8;stroke-linecap:round;stroke-width:6px}.lw-angle-explorer-vertex{fill:#f59e0b;stroke:#fff;stroke-width:4px}.lw-angle-type-grid{grid-template-columns:repeat(auto-fit,minmax(110px,1fr));gap:10px;padding:12px;display:grid}.lw-angle-type-grid article.is-selected{background:#eff6ff;border-color:#2563eb}.lw-geometry-card .is-highlighted,.lw-geometry-card .is-focused{filter:drop-shadow(0 0 12px #f59e0b8c);outline-offset:2px;outline:3px solid #f59e0b8c}.lw-geometry-card .is-pulsing{animation:1.2s ease-in-out infinite lwPulse}.lw-solid-stage,.lw-transformation-stage{background:linear-gradient(135deg,#eef2ff,#fff);border:1px solid #7c3aed29;border-radius:22px;overflow:hidden}.lw-solid-stage svg,.lw-transformation-stage svg{width:100%;display:block}.lw-solid-top,.lw-solid-face,.lw-solid-side,.lw-transform-shape{stroke:#1d4ed8;stroke-linejoin:round;stroke-width:4px}.lw-solid-top{fill:#dbeafe}.lw-solid-face,.lw-transform-shape.original{fill:#bfdbfe}.lw-solid-side,.lw-transform-shape.image{fill:#c4b5fd;stroke:#7c3aed}.lw-solid-edge,.lw-transform-guide,.lw-transform-mirror,.lw-transform-rotation-arc,.lw-transform-symmetry{fill:none;stroke:#f59e0b;stroke-linecap:round;stroke-width:4px}.lw-solid-vertex,.lw-transform-center{fill:#f97316;stroke:#fff;stroke-width:4px}.lw-solid-stage ellipse,.lw-solid-stage path{fill:#7c3aed24;stroke:#7c3aed;stroke-width:4px}.lw-solid-stage line{stroke:#f59e0b;stroke-dasharray:6 5;stroke-width:4px}.lw-solid-stage text{fill:#0f172a;paint-order:stroke;stroke:#ffffffe6;stroke-width:4px;font-size:13px;font-weight:900}.lw-transformation-stage marker path{fill:#f59e0b}.lw-transformation-stage .lw-transform-mirror,.lw-transformation-stage .lw-transform-symmetry{stroke-dasharray:8 7}.lw-measurement-stage,.lw-probability-stage{background:linear-gradient(135deg,#ecfeff,#fff);border:1px solid #0ea5e929;border-radius:22px;overflow:hidden}.lw-measurement-stage svg,.lw-data-graph-stage,.lw-probability-stage svg{width:100%;display:block}.lw-measurement-stage rect,.lw-measurement-stage path,.lw-measurement-stage ellipse,.lw-measurement-stage line,.lw-data-graph-stage line,.lw-probability-stage line{stroke:#0f766e;stroke-linecap:round;stroke-linejoin:round;stroke-width:4px}.lw-measurement-ruler,.lw-measurement-stage path,.lw-data-bar,.lw-probability-sector{fill:#14b8a62e}.lw-measurement-stage text,.lw-data-graph-stage text,.lw-probability-stage text{fill:#0f172a;paint-order:stroke;stroke:#ffffffe6;stroke-width:4px;font-size:13px;font-weight:900}.lw-measurement-equation{background:#f8fafc;border:1px solid #94a3b83d;border-radius:18px;flex-wrap:wrap;justify-content:center;align-items:center;gap:12px;margin-top:14px;padding:14px;display:flex}.lw-measurement-equation strong{color:#0f766e;font-size:1.1rem}.lw-measurement-equation em,.lw-measurement-equation span{color:#f97316;font-size:1.1rem;font-style:normal;font-weight:900}.lw-data-graph-stage{background:#fff;border:1px solid #0ea5e929;border-radius:22px}.lw-data-graph-stage line{stroke:#0f766e47}.lw-data-bar{stroke:#0f766e;stroke-width:3px}.lw-data-bar:nth-of-type(2n){fill:#2563eb2e;stroke:#2563eb}.lw-probability-sector{stroke:#fff;stroke-width:3px}.lw-probability-sector.is-favorable{fill:#22c55e57}.lw-probability-stage circle{fill:#f97316;stroke:#fff;stroke-width:4px}.lw-integer-stage,.lw-algebra-stage{background:linear-gradient(135deg,#fefce8,#fff);border:1px solid #eab30833;border-radius:22px;width:100%;display:block}.lw-integer-stage line,.lw-integer-stage path,.lw-algebra-stage line,.lw-algebra-stage path{fill:none;stroke:#ca8a04;stroke-linecap:round;stroke-linejoin:round;stroke-width:4px}.lw-integer-axis{stroke:#1d4ed8;stroke-width:5px}.lw-integer-arrow{fill:none;stroke:#f97316;stroke-dasharray:8 6;stroke-width:5px}.lw-integer-point,.lw-algebra-tile{fill:#2563eb;stroke:#fff;stroke-width:4px}.lw-integer-point.is-result,.lw-algebra-tile.result{fill:#16a34a}.lw-integer-stage text,.lw-algebra-stage text{fill:#0f172a;paint-order:stroke;stroke:#ffffffe6;stroke-width:4px;font-size:13px;font-weight:900}.lw-decimal-chart,.lw-ratio-model-row,.lw-ratio-table-line{gap:12px;display:grid}.lw-decimal-chart{grid-template-columns:1fr auto repeat(3,1fr)}.lw-decimal-chart article,.lw-ratio-model-row article{background:#f8fafc;border:1px solid #94a3b83d;border-radius:18px;justify-items:center;gap:8px;padding:14px;display:grid}.lw-decimal-chart span,.lw-ratio-model-row span{color:#64748b;letter-spacing:.1em;text-transform:uppercase;font-size:.72rem;font-weight:900}.lw-decimal-chart strong,.lw-ratio-model-row strong{color:#1d4ed8;font-size:1.55rem}.lw-decimal-model-row{grid-template-columns:minmax(220px,.8fr) 1.2fr;gap:14px;margin-top:14px;display:grid}.lw-decimal-grid{background:#fff;border:1px solid #2563eb24;border-radius:18px;width:100%}.lw-decimal-grid rect{fill:#e2e8f0;stroke:#fff;stroke-width:1px}.lw-decimal-grid rect[data-target-id=decimal-tenths-shaded]{fill:#60a5fa}.lw-decimal-grid rect[data-target-id=decimal-hundredths-shaded]{fill:#f97316}.lw-ratio-model-row{grid-template-columns:1fr auto 1fr;align-items:stretch}.lw-ratio-model-row article div{flex-wrap:wrap;justify-content:center;gap:6px;display:flex}.lw-ratio-model-row i{background:#60a5fa;border-radius:999px;width:16px;height:16px;display:inline-block}.lw-ratio-model-row article:last-child i{background:#f97316}.lw-ratio-model-row>strong{color:#1d4ed8;align-self:center;font-size:2rem}.lw-ratio-table-line{grid-template-columns:minmax(220px,.9fr) 1.1fr;margin-top:14px}.lw-ratio-table-line table{border-collapse:separate;border-spacing:0;width:100%;overflow:hidden}.lw-ratio-table-line th,.lw-ratio-table-line td{color:#0f172a;text-align:center;background:#f8fafc;border:1px solid #94a3b83d;padding:10px;font-weight:900}.lw-ratio-double-number-line{background:#fff;border:1px solid #2563eb24;border-radius:18px;grid-template-columns:repeat(3,1fr);align-content:center;gap:8px;padding:14px;display:grid}.lw-ratio-double-number-line strong{background:#1d4ed8;border-radius:999px;grid-column:1/-1;height:5px}.lw-algebra-tile.variable{fill:#7c3aed}.lw-algebra-tile.constant{fill:#f97316}.lw-percent-layout,.lw-time-money-layout{grid-template-columns:minmax(220px,.8fr) 1.2fr;gap:14px;display:grid}.lw-percent-grid,.lw-time-money svg,.lw-order-expression{background:#fff;border:1px solid #2563eb24;border-radius:22px;width:100%}.lw-percent-grid rect{fill:#e2e8f0;stroke:#fff;stroke-width:1px}.lw-percent-grid rect[data-target-id=percent-shaded-part]{fill:#22c55e}.lw-percent-benchmarks,.lw-order-flow,.lw-time-money .money-coins{flex-wrap:wrap;gap:10px;margin-top:14px;display:flex}.lw-percent-benchmarks span,.lw-time-money .money-coins span{color:#1d4ed8;background:#eff6ff;border:1px solid #2563eb2e;border-radius:999px;padding:8px 12px;font-weight:900}.lw-order-expression{color:#1d4ed8;text-align:center;padding:18px;font-size:clamp(1.5rem,3vw,2.5rem);font-weight:950}.lw-order-flow article{background:#f8fafc;border:1px solid #94a3b83d;border-radius:18px;flex:170px;gap:6px;padding:12px;display:grid}.lw-order-flow article span{color:#fff;background:#1d4ed8;border-radius:999px;justify-content:center;align-items:center;width:26px;height:26px;font-weight:900;display:inline-flex}.lw-order-flow article strong{color:#0f172a}.lw-order-flow article em{color:#64748b;font-style:normal;font-weight:800}.lw-time-money svg circle{fill:#f8fafc;stroke:#1d4ed8;stroke-width:5px}.lw-time-money svg line{stroke:#f97316;stroke-linecap:round;stroke-width:5px}.lw-time-money svg line[data-target-id=time-hour-hand]{stroke:#7c3aed;stroke-width:7px}.lw-time-money svg text{fill:#0f172a;font-size:13px;font-weight:900}.lw-prime-tree,.lw-pattern-graph-preview,.lw-statistics-summary svg{background:#fff;border:1px solid #2563eb24;border-radius:22px;width:100%;display:block}.lw-prime-tree circle,.lw-pattern-graph-preview circle,.lw-statistics-summary svg circle{fill:#dbeafe;stroke:#1d4ed8;stroke-width:4px}.lw-prime-tree line,.lw-pattern-graph-preview line,.lw-statistics-summary svg line{stroke:#64748b;stroke-linecap:round;stroke-width:3px}.lw-prime-tree text,.lw-pattern-graph-preview text,.lw-statistics-summary svg text{fill:#0f172a;paint-order:stroke;stroke:#ffffffe6;stroke-width:4px;font-size:13px;font-weight:900}.lw-pattern-row,.lw-statistics-data-set{flex-wrap:wrap;justify-content:center;align-items:center;gap:10px;margin-bottom:14px;display:flex}.lw-pattern-row span,.lw-pattern-row strong,.lw-statistics-data-set span{color:#1d4ed8;background:#eff6ff;border:1px solid #2563eb2e;border-radius:16px;padding:10px 14px;font-size:1.1rem;font-weight:950}.lw-pattern-row strong{color:#f97316;background:#fff7ed;border-color:#f9731640}.lw-triangle-side-chip-row{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;display:grid}.lw-triangle-side-chip{background:#f8fafc;border:1px solid #2563eb29;border-radius:18px;gap:6px;padding:14px;display:grid}.lw-triangle-side-chip span,.lw-triangle-formula-grid span{color:#64748b;letter-spacing:.1em;text-transform:uppercase;font-size:.78rem;font-weight:900}.lw-triangle-side-chip strong{color:#1e40af;font-size:clamp(1.2rem,2.4vw,1.8rem)}.lw-triangle-inequality-rule,.lw-triangle-inequality-result{border-radius:18px;gap:8px;margin-top:14px;padding:14px;display:grid}.lw-triangle-inequality-rule{color:#1e3a8a;background:#eff6ff;border:1px solid #2563eb33;font-weight:900}.lw-triangle-inequality-result{background:#f8fafc;border:1px solid #94a3b838}.lw-triangle-inequality-result.is-valid{color:#166534;background:#ecfdf5;border-color:#16a34a47}.lw-triangle-inequality-result.is-invalid{color:#991b1b;background:#fef2f2;border-color:#dc262638}.lw-triangle-measure-stage{background:linear-gradient(135deg,#eff6ff,#fff);border:1px solid #2563eb29;border-radius:22px;overflow:hidden}.lw-triangle-measure-stage svg{width:100%;display:block}.lw-triangle-measure-shape{fill:#60a5fa33;stroke:#1d4ed8;stroke-width:5px}.lw-triangle-measure-base,.lw-triangle-measure-height{stroke:#f59e0b;stroke-dasharray:7 6;stroke-linecap:round;stroke-width:5px}.lw-triangle-measure-stage text{fill:#0f172a;paint-order:stroke;stroke:#ffffffdb;stroke-width:4px;font-size:15px;font-weight:900}.lw-triangle-formula-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin-top:14px;display:grid}.lw-triangle-formula-grid article{background:#f8fafc;border:1px solid #94a3b83d;border-radius:18px;gap:8px;padding:14px;display:grid}.lw-triangle-formula-grid strong{color:#1e40af;font-size:clamp(1rem,2vw,1.3rem)}.lw-triangle-formula-grid em{color:#475569;font-style:normal;font-weight:800}.lw-comparison-row{flex-wrap:wrap;gap:10px;margin-top:16px;display:flex}.lw-comparison-chip{background:#f8fafc;padding:10px 14px}.lw-tutor-message{align-items:flex-start;gap:14px;display:flex}.lw-tutor-avatar{color:#fff;background:linear-gradient(135deg,#2563eb,#7c3aed);border-radius:24px;flex:0 0 58px;justify-content:center;align-items:center;height:58px;font-weight:900;display:flex;box-shadow:0 16px 32px #2563eb3d}.lw-tutor-bubble{border:1px solid var(--lw-line);background:#fff;border-radius:24px;width:100%;padding:18px}.lw-tutor-meta{color:var(--lw-muted);text-transform:uppercase;align-items:center;gap:8px;font-size:.8rem;font-weight:700;display:flex}.lw-speaking-dot{background:var(--lw-muted);border-radius:999px;width:9px;height:9px;display:inline-block}.speaking-speaking .lw-speaking-dot{background:var(--lw-success);animation:1s ease-in-out infinite lwPulse}.speaking-paused .lw-speaking-dot{background:var(--lw-warning)}.speaking-finished .lw-speaking-dot{background:var(--lw-accent)}.lw-tutor-bubble p{margin:10px 0 0;font-size:1.06rem;line-height:1.65}.lw-tutor-bubble mark{color:#92400e;background:#fef3c7;border-radius:8px;padding:0 4px}.lw-typing-dots{gap:5px;margin-top:12px;display:flex}.lw-typing-dots span{background:var(--lw-accent);border-radius:999px;width:7px;height:7px;animation:.9s ease-in-out infinite lwTyping}.lw-typing-dots span:nth-child(2){animation-delay:.12s}.lw-typing-dots span:nth-child(3){animation-delay:.24s}@keyframes lwTyping{50%{opacity:.35;transform:translateY(-3px)}}.lw-tutor-actions,.lw-tutor-voice-controls,.lw-question-actions,.lw-panel-actions{flex-wrap:wrap;gap:10px;margin-top:16px;display:flex}.lw-question-card input{border:1px solid var(--lw-line);box-sizing:border-box;font:inherit;border-radius:16px;width:100%;margin-top:12px;padding:14px 16px}.lw-option-list{gap:10px;margin-top:16px;display:grid}.lw-option-list button{text-align:left;background:#fff;padding:14px 16px}.lw-option-list button.is-selected{border-color:var(--lw-accent);background:#eff6ff;box-shadow:0 0 0 4px #2563eb1a}.lw-question-actions button,.lw-panel-actions button,.lw-tutor-actions button,.lw-tutor-voice-controls button,.lw-mastery-panel button{color:var(--lw-ink);background:#fff;padding:10px 14px}.lw-question-actions .primary,.lw-tutor-actions .primary,.lw-mastery-panel .primary{background:var(--lw-accent);border-color:var(--lw-accent);color:#fff;font-weight:800}.lw-tutor-voice-controls{border:1px solid var(--lw-line);background:#f8fafc;border-radius:18px;align-items:center;padding:10px}.lw-tutor-voice-controls button:first-child{color:#fff;background:linear-gradient(135deg,#2563eb,#7c3aed);border-color:#0000;font-weight:800}.lw-tutor-voice-controls button:disabled{cursor:not-allowed;opacity:.55}.lw-tutor-voice-status,.lw-tutor-voice-error{color:var(--lw-muted);text-transform:capitalize;border-radius:999px;padding:6px 10px;font-size:.82rem;font-weight:800}.lw-tutor-voice-status.status-speaking,.lw-tutor-voice-status.status-loading{color:#166534;background:#dcfce7}.lw-tutor-voice-status.status-unsupported,.lw-tutor-voice-status.status-error,.lw-tutor-voice-error{color:#991b1b;background:#fee2e2}.lw-inline-feedback{color:var(--lw-muted);border-radius:14px;margin:12px 0 0}.validation-correct{border-color:#16a34a8c}.validation-incorrect{border-color:#dc262680}.validation-checking{border-color:#2563eb80}.lw-feedback-panel,.lw-hint-panel{gap:8px;display:grid}.lw-feedback-panel.severity-success{background:linear-gradient(135deg,#f0fdf4,#fff);border-color:#bbf7d0}.lw-feedback-panel.severity-error,.lw-feedback-panel.tone-corrective{background:linear-gradient(135deg,#fef2f2,#fff);border-color:#fecaca}.lw-hint-panel{background:linear-gradient(135deg,#fffbeb,#fff);border-color:#fde68a}.lw-remediation-text{color:#9a3412;font-weight:700}.lw-progress-track{background:#e2e8f0;border-radius:999px;height:12px;overflow:hidden}.lw-progress-track span{background:linear-gradient(90deg,#2563eb,#22c55e);height:100%;transition:width .24s;display:block}.lw-progress-steps{gap:8px;margin-top:14px;display:flex;overflow-x:auto}.lw-progress-steps button{background:#fff;flex-direction:column;flex:1;align-items:center;gap:3px;min-width:58px;padding:10px;display:flex}.lw-progress-steps button span{border-radius:999px;justify-content:center;align-items:center;width:28px;height:28px;font-weight:900;display:flex}.lw-progress-steps .status-completed span{color:#166534;background:#dcfce7}.lw-progress-steps .status-current span{color:#1d4ed8;background:#dbeafe}.lw-progress-steps .status-needs_review span{color:#92400e;background:#fef3c7}.lw-progress-steps .status-locked{opacity:.45}.lw-mastery-score{justify-content:space-between;align-items:center;gap:16px;display:flex}.lw-mastery-score strong{color:var(--lw-accent);font-size:clamp(2rem,6vw,4rem)}.lw-signal-grid{grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:12px;margin-top:16px;display:grid}.lw-signal-grid div{border:1px solid var(--lw-line);background:#f8fafc;border-radius:16px;padding:12px}.lw-signal-grid span{color:var(--lw-muted);font-size:.82rem;display:block}.lw-mastery-columns{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;margin-top:16px;display:grid}.lw-mastery-columns h4{margin:0 0 8px}.lw-mastery-columns ul{margin:0;padding-left:20px}.lw-mastery-panel.status-needs_practice{background:linear-gradient(135deg,#fffbeb,#fff);border-color:#fde68a}button:disabled{cursor:not-allowed;opacity:.55}.lw-component-lab{box-sizing:border-box;color:var(--lw-ink);background:radial-gradient(circle at 0 0,#2563eb2e,#0000 32rem),linear-gradient(#f8fbff,#eef4ff);min-height:100vh;padding:clamp(20px,4vw,56px)}.lw-lab-hero{color:#fff;background:linear-gradient(135deg,#0f172aeb,#1e40afdb),#0f172a;border-radius:34px;max-width:1180px;margin:0 auto 28px;padding:clamp(26px,5vw,54px);box-shadow:0 30px 80px #0f172a47}.lw-classroom-demo-hero{background:radial-gradient(circle at 85% 12%,#0ea5e947,#0000 24rem),linear-gradient(135deg,#0f172af0,#1d4ed8e0),#0f172a}.lw-classroom-demo-lead{color:#ffffffe0;max-width:62rem;margin:0;font-size:1.05rem;line-height:1.65}.lw-classroom-demo-pills{flex-wrap:wrap;gap:10px;margin-top:18px;display:flex}.lw-classroom-demo-pills span{letter-spacing:.04em;text-transform:uppercase;background:#ffffff1a;border:1px solid #ffffff2e;border-radius:999px;padding:8px 12px;font-size:.82rem;font-weight:800}.lw-demo-stats-grid{grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px;display:grid}.lw-demo-stat-card{background:#fffffff0;border:1px solid #94a3b83d;border-radius:22px;padding:18px;box-shadow:0 16px 40px #0f172a0f}.lw-demo-stat-card h2,.lw-demo-stat-card strong{color:#0f172a;margin:8px 0 0;font-size:clamp(1.4rem,3vw,2rem);line-height:1.1;display:block}.lw-demo-stat-card--warn{background:linear-gradient(135deg,#fef3c7f2,#fff);border-color:#f59e0b47}.lw-lab-hero .lw-eyebrow{color:#93c5fd}.lw-lab-hero h1{margin:0;font-size:clamp(2.2rem,7vw,5rem);line-height:.95}.lw-lab-hero p:last-child{color:#dbeafe;max-width:760px;font-size:1.1rem;line-height:1.7}.lw-lab-section{max-width:1180px;margin:0 auto 32px}.lw-lab-section>h2{margin:0 0 16px;font-size:clamp(1.4rem,3vw,2rem)}.lw-registry-summary,.lw-registry-meta{background:#ffffffd1;border:1px solid #94a3b83d;border-radius:24px;margin-bottom:18px;padding:18px;box-shadow:0 18px 48px #0f172a14}.lw-registry-summary h2{margin:0 0 8px}.lw-registry-summary p:last-child{color:var(--lw-muted);margin:0;line-height:1.6}.lw-storybook-shell{gap:18px;display:grid}.lw-storybook-topic-tabs{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;display:grid}.lw-storybook-topic-tabs button{color:var(--lw-ink);cursor:pointer;text-align:left;background:#ffffffe0;border:1px solid #94a3b847;border-radius:22px;gap:6px;padding:18px;display:grid;box-shadow:0 14px 34px #0f172a0f}.lw-storybook-topic-tabs button.is-active{background:linear-gradient(135deg,#eff6ff,#fff);border-color:#2563eb85;box-shadow:0 0 0 4px #2563eb1a,0 18px 44px #2563eb1f}.lw-storybook-topic-tabs strong{font-size:1.15rem}.lw-storybook-topic-tabs span,.lw-storybook-section-header p,.lw-storybook-component-card>p{color:var(--lw-muted);line-height:1.55}.lw-storybook-stats,.lw-storybook-chip-row{flex-wrap:wrap;gap:8px;margin-top:14px;display:flex}.lw-storybook-stats span,.lw-storybook-chip-row span{color:#1d4ed8;background:#eff6ff;border:1px solid #2563eb1f;border-radius:999px;padding:7px 10px;font-size:.78rem;font-weight:800}.lw-storybook-section-header{justify-content:space-between;align-items:end;gap:18px;margin-bottom:16px;display:flex}.lw-storybook-section-header h2{margin:0;font-size:clamp(1.5rem,3vw,2.2rem)}.lw-storybook-section-header p{max-width:520px;margin:0}.lw-storybook-component-grid{grid-template-columns:repeat(auto-fit,minmax(360px,1fr));gap:20px;display:grid}.lw-storybook-component-card{background:#fffffff0;border:1px solid #94a3b842;border-radius:28px;gap:14px;padding:18px;display:grid;overflow:hidden;box-shadow:0 18px 48px #0f172a14}.lw-storybook-component-card>header{align-items:start;gap:12px;display:flex}.lw-storybook-component-card>header>span{color:#fff;background:#0f172a;border-radius:16px;padding:9px 10px;font-size:.82rem;font-weight:900}.lw-storybook-component-card h3{margin:0 0 4px}.lw-storybook-component-card code{color:#475569;background:#f1f5f9;border-radius:999px;padding:5px 8px;font-size:.78rem}.lw-storybook-preview{background:radial-gradient(circle at 10% 0,#2563eb14,#0000 18rem),#f8fafc;border:1px solid #94a3b838;border-radius:24px;padding:12px}.lw-registry-meta{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px;display:grid}.lw-registry-meta article{border:1px solid var(--lw-line);background:#f8fafc;border-radius:18px;gap:4px;padding:12px;display:grid}.lw-registry-meta span,.lw-registry-meta small{color:var(--lw-muted)}.lw-lab-grid{grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:18px;display:grid}@media (width<=720px){.lw-visualizer-header,.lw-question-header,.lw-mastery-score{flex-direction:column;align-items:flex-start}.lw-triangle-visualizer,.lw-angle-sum-visualizer,.lw-classifier,.lw-question-card,.lw-feedback-panel,.lw-hint-panel,.lw-progress-indicator,.lw-mastery-panel{border-radius:20px;padding:16px}}.lw-narration-debug-panel,.lw-tutor-followup-panel,.lw-classroom-check-in{background:linear-gradient(180deg, #fffffffa, #f8fafcf5), var(--lw-surface);box-shadow:var(--lw-glow);border:1px solid #94a3b83d;border-radius:24px;margin-top:18px;padding:20px}.lw-classroom-check-in{background:linear-gradient(135deg,#2563eb14,#0ea5e90d),linear-gradient(#fff,#f8fbff);border-color:#2563eb38;position:relative}.lw-classroom-check-in.is-listening,.lw-student-question-card.is-listening{border-color:#0ea5e98c;box-shadow:0 0 0 4px #0ea5e91f,0 22px 48px #0ea5e929}.lw-student-question-card{background:linear-gradient(135deg,#10b9810f,#2563eb0a),#fff}.lw-classroom-check-in-header,.lw-student-question-header{align-items:flex-start}.lw-check-in-prompt-card,.lw-student-question-prompt{background:#ffffffd1;border:1px solid #94a3b838;border-radius:18px;margin:0 0 14px;padding:16px 18px}.lw-student-question-prompt h3{margin:0;font-size:clamp(1.15rem,2.4vw,1.45rem);line-height:1.45}.lw-mic-banner{background:linear-gradient(135deg,#0ea5e914,#e0f2fee6);border:1px solid #0ea5e938;border-radius:18px;align-items:center;gap:14px;margin:0 0 16px;padding:14px 16px;display:flex;position:relative}.lw-mic-banner.is-listening{background:linear-gradient(135deg,#0ea5e929,#bae6fdf2);border-color:#0284c773;animation:1.6s ease-in-out infinite lw-mic-banner-glow}.lw-mic-banner.is-waiting-teacher{background:linear-gradient(135deg,#fef3c7eb,#fffbebf5);border-color:#f59e0b59}.lw-mic-banner.is-waiting-teacher .lw-mic-banner-label{color:#b45309}.lw-mic-banner-status{color:#64748b;margin:6px 0 0;font-size:.82rem;font-weight:700}@keyframes lw-mic-banner-glow{0%,to{box-shadow:0 0 #0ea5e92e}50%{box-shadow:0 0 0 6px #0ea5e914}}.lw-mic-banner-icon{background:#fff;border:1px solid #0ea5e93d;border-radius:999px;flex-shrink:0;justify-content:center;align-items:center;width:52px;height:52px;display:flex;position:relative}.lw-mic-banner.is-listening .lw-mic-banner-icon{color:#fff;background:#0284c7;border-color:#0284c7}.lw-mic-icon{fill:currentColor;width:24px;height:24px}.lw-mic-pulse{border:2px solid #0ea5e973;border-radius:999px;animation:1.8s ease-out infinite lw-mic-pulse;position:absolute;inset:-6px}.lw-mic-pulse--2{animation-delay:.6s}@keyframes lw-mic-pulse{0%{opacity:.8;transform:scale(.82)}to{opacity:0;transform:scale(1.35)}}.lw-mic-banner-copy{flex:1;min-width:0}.lw-mic-banner-label{color:#0c4a6e;letter-spacing:.08em;text-transform:uppercase;margin:0 0 4px;font-size:.78rem;font-weight:800}.lw-mic-banner-text{color:#075985;margin:0;font-size:.94rem;font-weight:700;line-height:1.45}.lw-mic-live-dot{color:#fff;letter-spacing:.08em;background:#ef4444;border-radius:999px;align-self:flex-start;padding:5px 8px;font-size:.68rem;font-weight:900;animation:1.1s ease-in-out infinite lw-rec-blink}@keyframes lw-rec-blink{0%,to{opacity:1}50%{opacity:.55}}.lw-question-options,.lw-student-option-list{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin-top:4px;display:grid}.lw-question-option,.lw-student-option-list button{text-align:left;background:#fff;align-items:center;gap:12px;min-height:58px;padding:14px 16px;display:flex}.lw-question-option.is-selected,.lw-student-option-list button.is-selected{background:linear-gradient(135deg,#eff6ff,#fff);border-color:#2563eb;box-shadow:0 0 0 4px #2563eb1f}.lw-option-letter{color:#1d4ed8;background:#eff6ff;border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;width:34px;height:34px;font-size:.82rem;font-weight:900;display:inline-flex}.lw-question-option.is-selected .lw-option-letter,.lw-student-option-list button.is-selected .lw-option-letter{color:#fff;background:#2563eb}.lw-option-label{font-weight:700;line-height:1.35}.lw-answer-field{gap:8px;display:grid}.lw-answer-field-label{color:var(--lw-muted);letter-spacing:.06em;text-transform:uppercase;font-size:.82rem;font-weight:800}.lw-answer-field .lw-question-input,.lw-student-question-card input{background:#fff;border:1px solid #94a3b859;border-radius:16px;width:100%;min-height:54px;padding:14px 16px;font-size:1.05rem;font-weight:700}.lw-speech-chip{border-radius:16px;flex-wrap:wrap;align-items:center;gap:8px;margin-top:12px;padding:12px 14px;font-size:.92rem;font-weight:700;display:flex}.lw-speech-chip--heard{color:#115e59;background:#0f766e14;border:1px solid #0f766e2e}.lw-speech-chip-label{letter-spacing:.08em;text-transform:uppercase;background:#0f766e1f;border-radius:999px;padding:4px 8px;font-size:.72rem}.lw-speech-chip-value{font-size:1rem}.lw-speech-chip--warn,.lw-speech-chip--error{color:#991b1b;background:#dc262614;border:1px solid #dc26262e}.lw-speech-chip--processing{color:#1d4ed8;background:#2563eb14;border:1px solid #2563eb2e}.lw-speech-chip--answer_ready{color:#0e7490;background:#0e749014;border:1px solid #0e749033}.lw-speech-chip--submitting{color:#4338ca;background:#4f46e514;border:1px solid #4f46e533}.lw-speech-processing-spinner{border:2px solid #2563eb2e;border-top-color:#2563eb;border-radius:999px;flex:none;width:14px;height:14px;animation:.9s linear infinite lw-speech-spin}@keyframes lw-speech-spin{to{transform:rotate(360deg)}}.lw-mic-processing-ring{border:2px solid #0ea5e92e;border-top-color:#0284c7;border-radius:999px;animation:1.1s linear infinite lw-mic-ring-spin;position:absolute;inset:4px}@keyframes lw-mic-ring-spin{to{transform:rotate(360deg)}}.lw-answer-field.is-speech-landed .lw-question-input,.lw-answer-field.is-speech-landed input{border-color:#2563eb8c;animation:.68s lw-answer-landed;box-shadow:0 0 0 4px #2563eb1f}.lw-question-option.is-speech-landed,.lw-student-option-list button.is-speech-landed{border-color:#2563eb8c;box-shadow:0 0 0 4px #2563eb1f,0 16px 34px #2563eb24}.lw-question-card.is-speech-processing,.lw-classroom-check-in.is-speech-processing{box-shadow:0 0 0 3px #2563eb14}.lw-question-card.is-speech-answer_ready,.lw-classroom-check-in.is-speech-answer_ready{box-shadow:0 0 0 3px #0e74901a}.lw-question-card.is-speech-submitting,.lw-classroom-check-in.is-speech-submitting{box-shadow:0 0 0 3px #4f46e51a}.lw-student-turn-badge--processing,.lw-check-in-badge--processing{color:#1d4ed8;background:#2563eb1f;border-color:#2563eb38}.lw-student-turn-badge--answer_ready,.lw-check-in-badge--answer_ready{color:#0e7490;background:#0e74901f;border-color:#0e749038}.lw-student-turn-badge--submitting,.lw-check-in-badge--submitting{color:#4338ca;background:#4f46e51f;border-color:#4f46e538}@keyframes lw-answer-landed{0%{transform:translateY(2px)}to{transform:translateY(0)}}.lw-mic-banner--processing,.lw-mic-banner--answer_ready,.lw-mic-banner--submitting{border-color:#2563eb38}.lw-check-in-feedback-banner{border-radius:16px;margin-top:14px;padding:12px 14px;font-weight:700;line-height:1.5}.lw-check-in-feedback-banner--correct{color:#166534;background:#16a34a1a;border:1px solid #16a34a38}.lw-check-in-feedback-banner--incorrect{color:#991b1b;background:#dc262614;border:1px solid #dc26262e}.lw-check-in-feedback-banner--idle,.lw-check-in-feedback-banner--checking{color:#1d4ed8;background:#2563eb14;border:1px solid #2563eb2e}.lw-mic-action.is-active{color:#fff;background:#0284c7;border-color:#0284c7}.lw-student-turn-badge,.lw-attempt-pill{color:#047857;letter-spacing:.04em;text-transform:uppercase;background:#10b9811f;border:1px solid #10b98138;border-radius:999px;padding:6px 12px;font-size:.82rem;font-weight:800;transition:background .18s,border-color .18s,box-shadow .18s}.lw-student-question-card.is-listening .lw-student-turn-badge,.lw-classroom-check-in.is-listening .lw-check-in-badge{color:#0369a1;background:#0ea5e924;border-color:#0ea5e959;animation:1.2s ease-in-out infinite lw-listening-badge;box-shadow:0 0 0 4px #0ea5e91a}@keyframes lw-listening-badge{0%,to{transform:scale(1)}50%{transform:scale(1.04)}}.lw-student-question-actions{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.lw-question-retry{color:#64748b;cursor:pointer;font:inherit;background:0 0;border:1px dashed #94a3b8cc;border-radius:14px;padding:10px 14px;font-weight:700}.lw-tutor-followup-panel{background:linear-gradient(#fffffffa,#eff6fff5),#fff}.lw-tutor-followup-steps{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:0 0 18px;padding:0;list-style:none;display:grid}.lw-tutor-followup-step{color:#64748b;background:#f8fafc;border:1px solid #94a3b83d;border-radius:16px;align-items:center;gap:10px;padding:10px 12px;font-size:.88rem;font-weight:700;display:flex}.lw-tutor-followup-step.is-active{color:#1e3a8a;background:#eff6ff;border-color:#2563eb3d}.lw-tutor-followup-step.is-current{border-color:#2563eb;box-shadow:0 0 0 4px #2563eb1a}.lw-tutor-followup-step-index{background:#fff;border-radius:999px;justify-content:center;align-items:center;width:28px;height:28px;font-size:.78rem;font-weight:900;display:inline-flex}.lw-tutor-followup-step.is-current .lw-tutor-followup-step-index{color:#fff;background:#2563eb}.lw-tutor-followup-message-card{background:#ffffffe0;border:1px solid #94a3b82e;border-radius:20px;margin-bottom:16px;padding:12px}.lw-tutor-followup-answer-context{color:#334155;background:radial-gradient(circle at 12% 20%,#facc152e,#0000 32%),linear-gradient(135deg,#fffbebf2,#eff6fff0);border:1px solid #f59e0b42;border-radius:18px;gap:8px;margin-bottom:12px;padding:12px 14px;display:grid}.lw-tutor-followup-answer-context p{margin:0;line-height:1.45}.lw-tutor-followup-answer-context strong{color:#92400e}.lw-tutor-followup-start{width:100%;margin-top:4px}.lw-tutor-followup-complete-banner{color:#166534;background:linear-gradient(135deg,#16a34a1a,#fffffff2);border:1px solid #16a34a38;border-radius:18px;padding:16px 18px;font-weight:700;line-height:1.55}.lw-tutor-followup-phase--check_in{color:#0369a1;background:#0ea5e924}.lw-tutor-followup-phase--completed{color:#166534;background:#16a34a24}.lw-narration-debug-header,.lw-tutor-followup-header{justify-content:space-between;align-items:center;gap:16px;margin-bottom:16px;display:flex}.lw-narration-debug-grid{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin-bottom:12px;display:grid}.lw-narration-debug-card{background:var(--lw-soft);border:1px solid var(--lw-line);border-radius:16px;padding:12px}.lw-narration-debug-card--wide{margin-bottom:12px}.lw-narration-debug-label{color:var(--lw-muted);margin:0 0 6px;font-size:.82rem}.lw-narration-debug-speaking{margin:0;font-size:1rem;line-height:1.5}.lw-narration-debug-status{border-radius:999px;padding:6px 12px;font-size:.85rem;font-weight:600}.lw-narration-debug-status--speaking{color:var(--lw-accent-strong);background:#2563eb1f}.lw-narration-debug-status--loading{color:var(--lw-warning);background:#d977061f}.lw-narration-debug-details pre{white-space:pre-wrap;margin:12px 0 0}.lw-check-in-mode{color:#075985;background:#0ea5e91a;border:1px solid #0ea5e938;border-radius:14px;margin:10px 0;padding:10px 12px;font-size:.92rem;font-weight:700}.lw-check-in-actions{flex-wrap:wrap;gap:10px;margin-top:12px;display:flex}.lw-check-in-speech-error{color:var(--lw-danger);margin:10px 0 0;font-size:.9rem;font-weight:700}.lw-check-in-heard{color:#0f766e;margin:10px 0 0;font-size:.9rem;font-weight:700}.lw-board-overlay .lw-tutor-followup-panel{border:2px solid #2563eb59;max-height:min(90vh,900px);margin-top:0;animation:.32s ease-out lw-followup-enter;overflow:auto;box-shadow:0 28px 80px #2563eb47}@keyframes lw-followup-enter{0%{opacity:0;transform:translateY(18px)scale(.98)}to{opacity:1;transform:translateY(0)scale(1)}}.lw-tutor-followup-visual,.lw-tutor-followup-visual-stack{gap:16px;margin:16px 0;display:grid}.lw-tutor-followup-phase,.lw-check-in-badge{color:var(--lw-accent-strong);letter-spacing:.04em;text-transform:uppercase;background:#2563eb1f;border:1px solid #2563eb33;border-radius:999px;padding:6px 12px;font-size:.82rem;font-weight:800}.lw-check-in-prompt{margin:0 0 14px;font-size:1.05rem;line-height:1.5}.lw-check-in-feedback{margin:12px 0 0}.lw-check-in-feedback--correct{color:var(--lw-success)}.lw-check-in-feedback--incorrect{color:var(--lw-danger)}.lw-tutor-followup-complete{gap:12px;margin-top:16px;display:grid}.lw-worked-example,.lw-proof-board{box-sizing:border-box;background:radial-gradient(circle at 18% 8%, #60a5fa29, transparent 36%), var(--lw-surface);box-shadow:var(--lw-glow);color:var(--lw-ink);border:1px solid #94a3b83d;border-radius:28px;padding:22px}.lw-board-slot-body .lw-worked-example,.lw-board-slot-body .lw-proof-board{border-radius:22px;padding:clamp(14px,1.4vw,20px);box-shadow:0 14px 42px #2563eb1a}.lw-worked-example-header,.lw-proof-board-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px;display:flex}.lw-worked-example-header h3,.lw-proof-board-header h3{flex:240px;margin:0;font-size:clamp(1.05rem,2vw,1.4rem);line-height:1.2}.lw-worked-step-list,.lw-proof-step-list{counter-reset:lw-step;gap:12px;margin:0;padding:0;list-style:none;display:grid}.lw-worked-step,.lw-proof-step{background:#ffffffd1;border:1px solid #94a3b838;border-left:4px solid #94a3b866;border-radius:16px;align-items:flex-start;gap:14px;padding:14px 16px;transition:border-color .25s,box-shadow .25s,transform .25s;display:flex}.lw-board-slot-body .lw-worked-step,.lw-board-slot-body .lw-proof-step{gap:10px;padding:12px 14px}.lw-worked-step.is-highlighted,.lw-proof-step.is-highlighted{border-color:#2563eb80;border-left-color:var(--lw-accent,#2563eb);transform:translate(2px);box-shadow:0 0 0 4px #2563eb1f}.lw-worked-step-index{color:#1e40af;letter-spacing:.04em;text-transform:uppercase;white-space:nowrap;background:#e0edff;border-radius:999px;flex:none;padding:6px 12px;font-size:.74rem;font-weight:800}.lw-worked-step-body,.lw-proof-step-body{gap:4px;display:grid}.lw-worked-step-expression{font-variant-numeric:tabular-nums;font-size:1.02rem}.lw-worked-step-detail,.lw-proof-step-reason{color:var(--lw-muted);margin:0;font-size:.92rem}.lw-worked-step-result{color:#047857;align-self:center;margin-left:auto;font-weight:800}.lw-worked-answer,.lw-proof-conclusion{background:linear-gradient(135deg,#10b9811f,#2563eb14);border:1px solid #10b9814d;border-radius:18px;align-items:center;gap:12px;margin-top:16px;padding:14px 18px;display:flex}.lw-worked-answer strong,.lw-proof-conclusion strong{font-size:1.05rem}.lw-worked-answer-label{color:var(--lw-muted);letter-spacing:.06em;text-transform:uppercase;font-size:.8rem;font-weight:700}.lw-proof-step-kind{letter-spacing:.05em;text-transform:uppercase;white-space:nowrap;border-radius:999px;flex:none;padding:6px 12px;font-size:.72rem;font-weight:800}.lw-proof-step.kind-given .lw-proof-step-kind{color:#334155;background:#e2e8f0}.lw-proof-step.kind-claim .lw-proof-step-kind{color:#6d28d9;background:#ede9fe}.lw-proof-step.kind-evidence .lw-proof-step-kind{color:#1d4ed8;background:#dbeafe}.lw-proof-step.kind-justification .lw-proof-step-kind{color:#b45309;background:#fef3c7}.lw-proof-step.kind-conclusion .lw-proof-step-kind{color:#047857;background:#d1fae5}.lw-proof-step.kind-given{border-left-color:#94a3b8}.lw-proof-step.kind-claim{border-left-color:#8b5cf6}.lw-proof-step.kind-evidence{border-left-color:#3b82f6}.lw-proof-step.kind-justification{border-left-color:#f59e0b}.lw-proof-step.kind-conclusion{border-left-color:#10b981}.lw-proof-step-statement{font-size:1rem;line-height:1.35}.lw-board-slot-body .lw-worked-step-expression,.lw-board-slot-body .lw-proof-step-statement{font-size:.96rem}.lw-proof-conclusion-mark{color:#047857;font-size:1.4rem;font-weight:800;line-height:1}@media (width<=720px){.lw-worked-example,.lw-proof-board{border-radius:20px;padding:16px}.lw-worked-step,.lw-proof-step{flex-direction:column}.lw-worked-step-result{margin-left:0}}.lw-fraction-visualizer{padding:20px;overflow:hidden}.lw-fraction-stage{background:radial-gradient(circle at 15% 15%,#fbbf2433,#0000 26%),linear-gradient(135deg,#fffffff0,#eff6fff5);border:1px solid #94a3b838;border-radius:24px;gap:18px;padding:clamp(16px,2vw,24px);transition:box-shadow .18s,transform .18s;display:grid}.lw-fraction-stage.is-highlighted,.lw-fraction-stage.is-focused{transform:translateY(-2px);box-shadow:0 0 0 4px #2563eb29,0 22px 60px #2563eb2e}.lw-fraction-strips{gap:16px;display:grid}.lw-fraction-strip{background:#ffffffdb;border:1px solid #94a3b838;border-radius:20px;padding:14px;transition:border-color .16s,box-shadow .16s,transform .16s}.lw-fraction-strip.is-highlighted,.lw-fraction-strip.is-focused{border-color:#2563eb9e;transform:scale(1.01);box-shadow:0 14px 34px #2563eb2e}.lw-fraction-strip-label{justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:10px;display:flex}.lw-fraction-strip-label span{color:var(--fraction-color,#2563eb)}.lw-fraction-strip-label strong{color:var(--lw-muted);font-size:.86rem}.lw-fraction-stack{background:#ffffffeb;border:1px solid #94a3b847;border-radius:16px;place-items:center;min-width:64px;padding:8px 12px;display:inline-grid;box-shadow:inset 0 -8px 20px #0f172a0a}.lw-fraction-stack strong{color:var(--fraction-color,#2563eb);font-size:clamp(1.1rem,2.2vw,1.65rem);font-weight:950;line-height:1}.lw-fraction-stack em{background:currentColor;border-radius:999px;width:34px;height:3px;margin:5px 0}.lw-fraction-bar{--fraction-color:#2563eb;background:#eff6ff;border:3px solid #0f172a24;border-radius:18px;grid-auto-flow:column;height:clamp(54px,8vw,84px);display:grid;position:relative;overflow:hidden;box-shadow:inset 0 1px #ffffffbf,0 12px 28px #0f172a14}.lw-fraction-fill{background:linear-gradient(135deg, color-mix(in srgb, var(--fraction-color) 88%, white), var(--fraction-color));opacity:.28;transition:width .36s;position:absolute;top:0;bottom:0;left:0}.lw-fraction-part{z-index:1;border-right:2px solid #0f172a2e;justify-content:center;align-items:center;display:flex;position:relative}.lw-fraction-part span{color:#0f172a9e;background:#ffffffb8;border-radius:999px;min-width:22px;padding:4px 6px;font-size:.72rem;font-weight:900}.lw-fraction-part:last-child{border-right:0}.lw-fraction-part.is-shaded{background:linear-gradient(135deg, #ffffff2e, transparent), color-mix(in srgb, var(--fraction-color) 82%, white)}.lw-fraction-part.is-highlighted,.lw-fraction-fill.is-highlighted,.lw-fraction-bar.is-highlighted,.lw-number-line-marker.is-highlighted,.lw-fraction-operation-model.is-highlighted,.lw-common-denominator-callout.is-highlighted,.lw-fraction-equation [data-target-id].is-highlighted{filter:drop-shadow(0 0 14px #facc15e6);outline-offset:2px;outline:3px solid #facc15bf}.lw-fraction-part.is-pulsing,.lw-fraction-strip.is-pulsing,.lw-number-line-marker.is-pulsing,.lw-fraction-operation-model.is-pulsing,.lw-fraction-equation [data-target-id].is-pulsing{animation:.76s ease-in-out infinite alternate lw-fraction-pulse}.lw-fraction-equation{color:#fff;background:radial-gradient(circle at 18% 20%,#facc1529,#0000 28%),#0f172a;border-radius:999px;flex-wrap:wrap;justify-content:center;align-items:center;gap:12px;padding:14px 18px;font-size:clamp(1.1rem,2.4vw,1.7rem);font-weight:900;display:flex}.lw-fraction-equation span{background:#ffffff1f;border-radius:999px;padding:8px 14px}.lw-fraction-equation em{color:#facc15;font-style:normal}.lw-fraction-number-line{height:90px;margin:4px 24px 0;position:relative}.lw-number-line-track{background:linear-gradient(90deg,#2563eb,#7c3aed);border-radius:999px;height:8px;position:absolute;top:42px;left:0;right:0}.lw-number-line-label{color:var(--lw-muted);font-weight:900;position:absolute;top:54px}.lw-number-line-label.is-zero{left:-4px}.lw-number-line-label.is-one{right:-4px}.lw-number-line-marker{background:var(--fraction-color,#2563eb);color:#fff;text-align:center;border:4px solid #fff;border-radius:999px;min-width:48px;padding:7px 10px;transition:box-shadow .16s,transform .16s;position:absolute;top:10px;transform:translate(-50%);box-shadow:0 12px 30px #0f172a38}.lw-number-line-marker.is-highlighted,.lw-number-line-marker.is-focused{transform:translate(-50%)translateY(-3px)scale(1.04)}.lw-common-denominator-callout{color:#92400e;text-align:center;background:radial-gradient(circle at 12% 25%,#fffc,#0000 24%),#fef3c7;border:1px solid #facc15;border-radius:18px;padding:12px 16px;font-weight:900;box-shadow:0 14px 34px #f59e0b24}.lw-fraction-operation-model{color:#0f172a;background:radial-gradient(circle at 14% 18%,#60a5fa29,#0000 30%),linear-gradient(135deg,#fff,#f8fafc);border:1px solid #94a3b83d;border-radius:22px;gap:12px;padding:16px;display:grid}.lw-operation-label{color:#2563eb;letter-spacing:.12em;text-transform:uppercase;font-size:.75rem;font-weight:900}.lw-fraction-takeaway{grid-template-columns:repeat(6,auto);justify-content:center;align-items:center}.lw-fraction-takeaway strong,.lw-fraction-division-model strong{color:#1e40af;background:#eff6ff;border:1px solid #2563eb33;border-radius:14px;padding:8px 12px}.lw-fraction-area-grid{grid-template-columns:repeat(var(--fraction-grid-columns), minmax(26px, 1fr));gap:4px;display:grid}.lw-fraction-area-grid span{aspect-ratio:1;background:#e0f2fe;border:1px solid #0ea5e947;border-radius:8px}.lw-fraction-area-grid span.is-overlap{background:linear-gradient(135deg,#facc15,#fb923c);border-color:#b4530952;box-shadow:0 10px 22px #f59e0b2e}.lw-division-group-row{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.lw-division-group-row span{color:#166534;text-align:center;background:#ecfdf5;border:1px solid #16a34a3d;border-radius:16px;padding:14px;font-weight:900}.lw-fraction-operation-note{color:#475569;text-align:center;background:#f8fafc;border:1px dashed #64748b52;border-radius:16px;padding:10px 12px;font-weight:800}@keyframes lw-fraction-pulse{0%{transform:scale(1)}to{transform:scale(1.035)}}.lw-classroom-demo-page{position:relative}.lw-classroom-demo-hero{isolation:isolate;position:relative;overflow:hidden}.lw-classroom-demo-hero h1{background:linear-gradient(135deg,#fff 0%,#dbeafe 55%,#93c5fd 100%);color:#0000;-webkit-background-clip:text;background-clip:text}.lw-classroom-hero-scene{pointer-events:none;z-index:0;position:absolute;inset:0}.lw-classroom-demo-hero>:not(.lw-classroom-hero-scene){z-index:1;position:relative}.lw-ambient-orbs{pointer-events:none;z-index:0;position:absolute;inset:0;overflow:hidden}.lw-ambient-orb{filter:blur(2px);pointer-events:none;border-radius:999px;position:absolute;transform:translate(0,0)}.lw-player-shell{isolation:isolate;position:relative;overflow:hidden}.lw-player-shell>:not(.lw-ambient-orbs){z-index:1;position:relative}.lw-celebration-host{pointer-events:none;z-index:20;position:absolute;inset:0;overflow:hidden}.lw-celebration-particle{pointer-events:none;border-radius:3px;width:8px;height:8px;position:absolute;top:42%;left:50%}.lw-digital-board{isolation:isolate;position:relative}.lw-digital-board:before{content:"";pointer-events:none;z-index:0;background:radial-gradient(circle at 18% 0,#60a5fa24,#0000 34%),radial-gradient(circle at 88% 12%,#0ea5e91a,#0000 28%);position:absolute;inset:0}.lw-digital-board>*{z-index:1;position:relative}.lw-board-slot.is-filled{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);transition:box-shadow .22s,transform .22s}.lw-board-slot.is-filled:hover{transform:translateY(-2px);box-shadow:0 22px 48px #2563eb1a}.lw-board-slot.is-filled .lw-board-slot-body{transform-origin:top}.lw-board-slot.is-empty{background:linear-gradient(110deg,#f8fafce6 8%,#f1f5f9f2 18%,#f8fafce6 33%) 0 0/200% 100%;animation:2.8s ease-in-out infinite lw-slot-shimmer}@keyframes lw-slot-shimmer{0%{background-position:100% 0}to{background-position:-100% 0}}.lw-board-overlay{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#0f172a2e}.lw-tutor-followup-panel{transform-origin:top}.lw-tutor-message .lw-tutor-avatar{transition:box-shadow .18s}.lw-tutor-bubble{transition:box-shadow .22s,transform .22s;box-shadow:0 14px 36px #0f172a0f}.tone-encouraging .lw-tutor-bubble{border-color:#2563eb38}.tone-corrective .lw-tutor-bubble{border-color:#f59e0b47}.lw-player-toolbar{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);transform-origin:top}.lw-demo-stat-card{transform-origin:bottom;transition:box-shadow .22s,transform .22s}.lw-demo-stat-card:hover{transform:translateY(-3px);box-shadow:0 22px 48px #2563eb1f}.lw-demo-stat-card--progress strong{background:linear-gradient(135deg,#2563eb,#0ea5e9);color:#0000;-webkit-background-clip:text;background-clip:text}.lw-classroom-demo-pills span{transform-origin:50%;transition:background .18s,border-color .18s,transform .18s}.lw-classroom-demo-pills span:hover{background:#ffffff2e;transform:translateY(-2px)}.lw-classroom-demo-activity-section{margin-top:.5rem}.lw-classroom-demo-activity-picker{gap:1rem;display:grid}.lw-classroom-demo-activity-tabs{flex-wrap:wrap;gap:.5rem;display:flex}.lw-classroom-demo-activity-tab{color:#e2e8f0;cursor:pointer;font:inherit;background:#0f172a8c;border:1px solid #94a3b859;border-radius:999px;padding:.55rem 1rem;font-size:.92rem;font-weight:600;transition:background .2s,border-color .2s,transform .2s}.lw-classroom-demo-activity-tab:hover{border-color:#93c5fda6;transform:translateY(-1px)}.lw-classroom-demo-activity-tab.is-active{color:#fff;background:linear-gradient(135deg,#2563ebd9,#3b82f6a6);border-color:#bfdbfed9}.lw-classroom-demo-activity-summary{background:#0f172a73;border:1px solid #94a3b840;border-radius:1rem;padding:1rem 1.15rem}.lw-classroom-demo-activity-summary h2{margin:.25rem 0 .5rem;font-size:1.35rem}.lw-classroom-demo-activity-summary p{color:#cbd5e1;margin:0}.lw-classroom-demo-activity-meta{opacity:.75;font-size:.82rem;margin-top:.65rem!important}.lw-mic-banner.is-listening .lw-mic-live-dot{animation:none}.lw-mic-live-dot{animation:1.2s ease-in-out infinite lw-rec-pulse}.lw-feedback-panel,.lw-hint-panel,.lw-question-card,.lw-classroom-check-in{position:relative;overflow:hidden}.lw-speech-feedback-stack{gap:10px;display:grid}.lw-question-option,.lw-student-option-list button{transition:border-color .18s,box-shadow .22s,transform .22s;position:relative}.lw-question-option:hover:not(:disabled),.lw-student-option-list button:hover:not(:disabled){border-color:#93c5fd;transform:translateY(-2px);box-shadow:0 14px 32px #2563eb1f}.lw-question-option.is-selected,.lw-student-option-list button.is-selected{transform:translateY(-1px)}.lw-question-card.validation-correct,.lw-classroom-check-in.validation-correct{border-color:#22c55e73;box-shadow:0 0 0 4px #22c55e1a,0 22px 48px #22c55e1f}.lw-question-card.validation-incorrect,.lw-classroom-check-in.validation-incorrect{border-color:#ef444466;box-shadow:0 0 0 4px #ef444414,0 22px 40px #ef444414}.lw-check-in-feedback-banner--correct{animation:.42s lw-feedback-pop}@keyframes lw-feedback-pop{0%{opacity:0;transform:scale(.96)}to{opacity:1;transform:scale(1)}}.lw-progress-steps button.status-current{border-color:#2563eb}.lw-progress-steps button.status-completed{background:linear-gradient(135deg,#ecfdf5,#fff);border-color:#22c55e59}.lw-hint-panel.tone-remediation{background:linear-gradient(135deg, #f59e0b14, #fffffffa), var(--lw-surface);border-color:#f59e0b47}.lw-mastery-panel.status-passed{background:linear-gradient(135deg, #22c55e1a, #fffffffa), var(--lw-surface);border-color:#22c55e52}.lw-type-card{position:relative;overflow:hidden}.lw-type-card:after{content:"";opacity:0;pointer-events:none;background:linear-gradient(120deg,#0000,#ffffff8c,#0000);transition:opacity .18s;position:absolute;inset:0;transform:translate(-120%)}.lw-type-card:hover:after{opacity:1;animation:.7s lw-card-sheen}@keyframes lw-card-sheen{to{transform:translate(120%)}}.lw-angle-wedge{transition:transform .22s,filter .22s}.lw-angle-wedge:hover{filter:drop-shadow(0 8px 18px #2563eb2e);transform:scale(1.02)}@keyframes lw-rec-pulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.72;transform:scale(.94)}}@media (prefers-reduced-motion:reduce){.lw-mic-live-dot,.lw-board-slot.is-empty,.lw-speech-processing-spinner,.lw-mic-processing-ring,.lw-answer-field.is-speech-landed .lw-question-input,.lw-answer-field.is-speech-landed input{animation:none}.lw-board-slot.is-filled:hover,.lw-demo-stat-card:hover,.lw-question-option:hover:not(:disabled),.lw-student-option-list button:hover:not(:disabled),.lw-type-card:hover:after{transform:none}}.lw-player-shell{--lw-variant-accent:#2563eb;--lw-variant-accent-strong:#1d4ed8;--lw-variant-glow-1:#2563eb2e;--lw-variant-glow-2:#0ea5e91f;--lw-variant-surface-top:#f8fbff;--lw-variant-surface:#eef5ff;background:radial-gradient(circle at 12% 4%, var(--lw-variant-glow-1), transparent 28rem), radial-gradient(circle at 88% 8%, var(--lw-variant-glow-2), transparent 24rem), linear-gradient(180deg, var(--lw-variant-surface-top), var(--lw-variant-surface));box-sizing:border-box;min-height:100vh;padding:clamp(18px,3vw,42px)}.lw-player-shell.lw-variant-real_world{--lw-variant-accent:#c2410c;--lw-variant-accent-strong:#9a3412;--lw-variant-glow-1:#ea580c2e;--lw-variant-glow-2:#ca8a0424;--lw-variant-surface-top:#fffdf7;--lw-variant-surface:#fdf2e6}.lw-player-shell.lw-variant-proof_path{--lw-variant-accent:#6d28d9;--lw-variant-accent-strong:#5b21b6;--lw-variant-glow-1:#7c3aed2e;--lw-variant-glow-2:#4f46e51f;--lw-variant-surface-top:#fbfaff;--lw-variant-surface:#f0edfe}.lw-player-toolbar,.lw-player-logs article,.lw-player-step-actions,.lw-player-mastery-form{background:#ffffffe0;border:1px solid #94a3b83d;border-radius:26px;box-shadow:0 18px 56px #0f172a14,inset 0 1px #ffffffa6}.lw-player-toolbar{justify-content:space-between;align-items:center;gap:18px;max-width:1480px;margin:0 auto 20px;padding:18px;display:flex}.lw-player-toolbar h2{margin:0}.lw-player-toolbar-title{gap:4px;display:grid}.lw-player-toolbar-subtitle{color:#64748b;margin:0;font-size:.92rem;font-weight:700}.lw-player-status-chips{flex-wrap:wrap;gap:8px;display:flex}.lw-player-chip{color:#334155;letter-spacing:.04em;text-transform:uppercase;background:#f8fafc;border:1px solid #dbe4f0;border-radius:999px;padding:8px 12px;font-size:.78rem;font-weight:800;transition:background .18s,border-color .18s,transform .18s}.lw-player-chip--voice.lw-player-chip--speaking{color:#1d4ed8;background:#2563eb1f;border-color:#2563eb47;animation:1.4s ease-in-out infinite lw-chip-glow}@keyframes lw-chip-glow{0%,to{box-shadow:0 0 #2563eb00}50%{box-shadow:0 0 0 4px #2563eb1f}}.lw-player-chip--followup{color:#b45309;background:#f59e0b1f;border-color:#f59e0b47}.lw-player-chip--teacher{color:#0369a1;background:#0ea5e91f;border-color:#0ea5e947}.lw-player-chip--mic{color:#047857;background:#10b9811a;border-color:#10b98147}.lw-player-chip--mic.lw-player-chip--waiting,.lw-player-chip--mic.lw-player-chip--denied,.lw-player-chip--mic.lw-player-chip--unsupported{color:#b45309;background:#f59e0b1f;border-color:#f59e0b47}.lw-player-chip--mic.lw-player-chip--granted{animation:2.4s ease-in-out infinite lw-chip-glow}.lw-player-status-chips--voice{margin-left:0}.lw-player-toolbar-actions button.is-active{color:#fff;background:#2563eb;border-color:#2563eb}.lw-player-toolbar-actions{flex-wrap:wrap;justify-content:flex-end;gap:10px;display:flex}.lw-player-toolbar-actions button,.lw-player-primary-action,.lw-player-voice-status{color:#0f172a;cursor:pointer;font:inherit;background:#fff;border:1px solid #dbe4f0;border-radius:14px;padding:10px 14px;font-weight:800;transition:background .18s,border-color .18s,box-shadow .18s,transform .18s}.lw-player-toolbar-actions button:hover:not(:disabled),.lw-player-secondary-action:hover:not(:disabled){border-color:#93c5fd;transform:translateY(-1px);box-shadow:0 10px 24px #2563eb1f}.lw-player-toolbar-actions button:active:not(:disabled),.lw-player-primary-action:active:not(:disabled),.lw-player-secondary-action:active:not(:disabled){transform:translateY(0)}.lw-player-voice-status{cursor:default;align-items:center;display:inline-flex}.lw-player-primary-action{color:#fff;background:linear-gradient(135deg,#2563eb,#1d4ed8);border-color:#1d4ed8;box-shadow:0 12px 28px #2563eb47}.lw-player-primary-action:hover:not(:disabled){background:linear-gradient(135deg,#1d4ed8,#1e40af);transform:translateY(-2px);box-shadow:0 16px 32px #2563eb57}.lw-player-primary-action:disabled{cursor:not-allowed;opacity:.62;transform:none}.lw-player-secondary-action{color:#155e75;cursor:pointer;font:inherit;background:linear-gradient(135deg,#ecfeff,#f0fdfa);border:1px solid #67e8f9;border-radius:14px;padding:10px 14px;font-weight:800;transition:background .18s,border-color .18s,box-shadow .18s,transform .18s}.lw-player-secondary-action.is-active,.lw-mic-action.is-active{color:#fff;background:linear-gradient(135deg,#0891b2,#0284c7);border-color:#0284c7;box-shadow:0 0 0 4px #0ea5e929}.lw-player-secondary-action:disabled{cursor:not-allowed;opacity:.58}.lw-player-main-stack,.lw-player-support-stack{gap:14px;display:grid}.lw-player-step-actions{gap:12px;padding:18px;display:grid}.lw-player-step-actions p{color:#475569;margin:0;line-height:1.6}.lw-player-lesson-check-in{background:linear-gradient(135deg,#2563eb1f,#0ea5e914),#fffffff5;border-color:#2563eb38;gap:16px}.lw-player-lesson-check-in .lw-tutor-message{background:#ffffffe0;border:1px solid #94a3b82e;border-radius:20px;padding:12px}.lw-player-mastery-form{gap:14px;padding:18px;display:grid}.lw-player-mastery-form h3{margin:0}.lw-player-mastery-item{gap:8px;display:grid}.lw-player-mastery-item span{color:#0f172a;font-weight:800;line-height:1.4}.lw-player-mastery-item input{box-sizing:border-box;font:inherit;border:1px solid #dbe4f0;border-radius:14px;width:100%;padding:12px 14px}.lw-player-logs{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px;max-width:1480px;margin:20px auto 0;display:grid}.lw-player-logs article{padding:16px}.lw-tracking-panel{background:#ffffffeb;border:1px solid #94a3b83d;border-radius:22px;padding:16px;box-shadow:0 18px 56px #0f172a14}.lw-tracking-panel h3{margin:0 0 10px}.lw-tracking-panel pre{color:#dbeafe;background:#0f172a;border-radius:16px;max-height:360px;padding:14px;font-size:.78rem;overflow:auto}.lw-player-logs h3{margin:0 0 10px}.lw-player-logs pre{color:#dbeafe;background:#0f172a;border-radius:16px;max-height:360px;padding:14px;font-size:.78rem;overflow:auto}@media (width<=820px){.lw-player-toolbar{flex-direction:column;align-items:stretch}.lw-player-toolbar-actions{justify-content:flex-start}}.lw-player-shell .lw-eyebrow{color:var(--lw-variant-accent-strong)}.lw-player-shell .lw-player-toolbar{box-shadow:inset 0 3px 0 var(--lw-variant-accent), 0 18px 56px #0f172a14, inset 0 1px 0 #ffffffa6}.lw-player-shell .lw-player-chip--teacher{background:color-mix(in srgb, var(--lw-variant-accent) 12%, #fff);border-color:color-mix(in srgb, var(--lw-variant-accent) 45%, #dbe4f0);color:var(--lw-variant-accent-strong)}.lw-player-shell .lw-board-status-card.is-live{border-color:color-mix(in srgb, var(--lw-variant-accent) 55%, transparent);box-shadow:0 0 0 3px color-mix(in srgb, var(--lw-variant-accent) 16%, transparent)}.lw-monitor-banner{background:linear-gradient(135deg, color-mix(in srgb, var(--lw-variant-accent) 16%, #fff), color-mix(in srgb, var(--lw-variant-accent) 6%, #fff));border:1px solid color-mix(in srgb, var(--lw-variant-accent) 45%, #dbe4f0);box-shadow:0 14px 36px color-mix(in srgb, var(--lw-variant-accent) 18%, transparent);color:var(--lw-variant-accent-strong);z-index:2;border-radius:18px;align-items:center;gap:14px;margin:0 0 16px;padding:14px 18px;display:flex;position:relative}.lw-monitor-banner.is-intervening{border-color:color-mix(in srgb, var(--lw-variant-accent) 60%, transparent);box-shadow:0 0 0 3px color-mix(in srgb, var(--lw-variant-accent) 18%, transparent), 0 16px 40px color-mix(in srgb, var(--lw-variant-accent) 22%, transparent)}.lw-monitor-copy{gap:2px;display:grid}.lw-monitor-label{letter-spacing:.08em;text-transform:uppercase;font-size:.74rem;font-weight:800}.lw-monitor-message{color:var(--lw-ink,#0f172a);font-size:.95rem}.lw-monitor-pulse{background:var(--lw-variant-accent);box-shadow:0 0 0 0 color-mix(in srgb, var(--lw-variant-accent) 60%, transparent);border-radius:999px;flex:none;width:14px;height:14px;animation:1.6s ease-in-out infinite lw-monitor-pulse}@keyframes lw-monitor-pulse{0%{box-shadow:0 0 0 0 color-mix(in srgb, var(--lw-variant-accent) 55%, transparent)}70%{box-shadow:0 0 0 10px color-mix(in srgb, var(--lw-variant-accent) 0%, transparent)}to{box-shadow:0 0 0 0 color-mix(in srgb, var(--lw-variant-accent) 0%, transparent)}}@media (prefers-reduced-motion:reduce){.lw-monitor-pulse{animation:none}}.lw-digital-board{--lw-board-bg:#eef5ff;--lw-board-panel:#ffffffe6;--lw-board-panel-strong:#fff;--lw-board-ink:#0f172a;--lw-board-muted:#64748b;--lw-board-line:#94a3b842;--lw-board-accent:#2563eb;--lw-board-glow:0 24px 80px #2563eb2e;background:radial-gradient(circle at 16% 12%, #3b82f63d, transparent 30rem), radial-gradient(circle at 86% 4%, #7c3aed2e, transparent 28rem), linear-gradient(180deg, #f8fbff 0%, var(--lw-board-bg) 100%);border:1px solid var(--lw-board-line);box-shadow:var(--lw-board-glow);box-sizing:border-box;color:var(--lw-board-ink);border-radius:34px;min-height:780px;padding:clamp(16px,2vw,28px);position:relative;overflow:hidden}.lw-digital-board.theme-dark{--lw-board-bg:#0f172a;--lw-board-panel:#0f172adb;--lw-board-panel-strong:#111827;--lw-board-ink:#f8fafc;--lw-board-muted:#cbd5e1;--lw-board-line:#e2e8f02e;--lw-board-accent:#60a5fa;background:radial-gradient(circle at 18% 10%,#60a5fa38,#0000 26rem),linear-gradient(#111827,#020617)}.lw-digital-board.theme-kid_friendly{--lw-board-bg:#fff7ed;--lw-board-accent:#f97316;background:radial-gradient(circle at 15% 10%,#fbbf244d,#0000 30rem),radial-gradient(circle at 88% 8%,#2dd4bf38,#0000 24rem),linear-gradient(#fffaf0,#effdf8)}.lw-board-header{grid-template-columns:minmax(0,1fr) minmax(220px,320px);align-items:stretch;gap:18px;margin-bottom:20px;display:grid}.lw-board-title-block,.lw-board-status-card,.lw-board-slot,.lw-board-debug,.lw-board-overlay{-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:var(--lw-board-panel);border:1px solid var(--lw-board-line);border-radius:26px;box-shadow:0 18px 56px #0f172a14}.lw-board-title-block{padding:clamp(20px,3vw,34px)}.lw-board-eyebrow{color:var(--lw-board-accent);letter-spacing:.16em;text-transform:uppercase;margin:0 0 8px;font-size:.72rem;font-weight:900}.lw-board-title-block h1{margin:0;font-size:clamp(2rem,5vw,4.5rem);line-height:.95}.lw-board-meta{flex-wrap:wrap;gap:10px;margin-top:18px;display:flex}.lw-board-meta span,.lw-board-status-card span,.lw-board-status-card small,.lw-board-slot-header span,.lw-board-slot-header em{color:var(--lw-board-muted);letter-spacing:.08em;text-transform:uppercase;font-size:.78rem;font-weight:800}.lw-board-meta span{color:var(--lw-board-accent);background:#2563eb14;border:1px solid #2563eb24;border-radius:999px;padding:8px 12px}.lw-board-status-card{flex-direction:column;justify-content:center;padding:22px;display:flex}.lw-board-status-card strong{color:var(--lw-board-ink);text-transform:capitalize;margin:8px 0;font-size:clamp(1.2rem,3vw,2.1rem);line-height:1.05}.lw-board-status-card.is-live{background:linear-gradient(135deg, #2563eb1f, #0ea5e914), var(--lw-board-panel);border-color:#2563eb57;animation:2.4s ease-in-out infinite lw-board-live-glow}@keyframes lw-board-live-glow{0%,to{box-shadow:0 18px 56px #2563eb1f}50%{box-shadow:0 18px 56px #2563eb38,0 0 0 4px #2563eb14}}.lw-board-status-card.is-live strong:before{content:"";vertical-align:middle;background:#f59e0b;border-radius:999px;width:10px;height:10px;margin-right:8px;animation:1.1s ease-in-out infinite lw-rec-blink;display:inline-block}.lw-board-step-progress{margin:16px 0 0}.lw-board-step-progress-meta{color:var(--lw-board-muted);letter-spacing:.06em;text-transform:uppercase;justify-content:space-between;align-items:center;margin-bottom:8px;font-size:.82rem;font-weight:800;display:flex}.lw-board-step-progress-meta strong{color:var(--lw-board-accent);font-size:.92rem}.lw-board-step-progress-track{background:#94a3b838;border-radius:999px;height:10px;overflow:hidden}.lw-board-step-progress-track span{background:linear-gradient(90deg,#2563eb,#14b8a6);height:100%;transition:width .32s;display:block}.lw-digital-board.status-waiting_for_answer .lw-board-status-card{border-color:#f59e0b73}.lw-digital-board.status-showing_feedback .lw-board-status-card{border-color:#0ea5e973}.lw-digital-board.status-complete .lw-board-status-card{border-color:#16a34a73}.lw-digital-board.status-error .lw-board-status-card{border-color:#dc262673}.lw-board-center-stage .lw-board-slot.slot-main{background:radial-gradient(circle at 50% 0%, #60a5fa1a, transparent 42%), var(--lw-board-panel);min-height:clamp(360px,48vw,560px)}.lw-board-center-stage .lw-board-slot.slot-main.is-filled{box-shadow:inset 0 1px #ffffffb3,0 24px 64px #2563eb1f}.lw-board-left-rail,.lw-board-right-rail,.lw-board-center-stage{flex-direction:column;gap:18px;min-width:0;display:flex}.lw-board-grid{grid-template-columns:minmax(220px,.78fr) minmax(360px,1.9fr) minmax(260px,.9fr);align-items:start;gap:clamp(12px,1.4vw,18px);display:grid}.lw-board-slot{box-sizing:border-box;min-height:160px;padding:clamp(10px,1.2vw,14px);position:relative;overflow:hidden}.lw-board-slot.slot-main{background:linear-gradient(135deg, #ffffffe0, #eff6ffe0), var(--lw-board-panel-strong);min-height:clamp(360px,48vw,560px)}.lw-board-slot.slot-progress,.lw-board-slot.slot-mastery{min-height:120px}.lw-board-slot.slot-support.is-empty,.lw-board-slot.slot-mastery.is-empty{min-height:96px}.lw-board-slot-header{justify-content:space-between;align-items:center;margin-bottom:12px;display:flex}.lw-board-slot-header em{color:var(--lw-board-accent);font-style:normal}.lw-board-slot-label{letter-spacing:.06em;text-transform:uppercase;align-items:center;gap:8px;font-weight:900;display:inline-flex}.lw-board-slot-label:before{content:"";background:#2563eb1f;border-radius:10px;width:10px;height:10px;display:inline-block}.lw-board-slot-label--tutor:before{background:#2563eb}.lw-board-slot-label--main:before{background:#14b8a6}.lw-board-slot-label--interaction:before{background:#f59e0b}.lw-board-slot-label--support:before{background:#8b5cf6}.lw-board-slot-label--progress:before{background:#22c55e}.lw-board-slot-label--mastery:before{background:#ec4899}.lw-board-slot-highlight{color:#b45309;letter-spacing:.08em;text-transform:uppercase;background:#f59e0b1f;border-radius:999px;padding:4px 8px;font-size:.72rem;font-weight:900}.lw-board-slot-body{min-width:0}.lw-board-center-stage .lw-board-slot-body>*,.lw-board-left-rail .lw-board-slot-body>*,.lw-board-right-rail .lw-board-slot-body>*{max-width:100%}.lw-board-empty-slot{color:var(--lw-board-muted);text-align:center;background:#94a3b814;border:1px dashed #64748b47;border-radius:18px;justify-content:center;align-items:center;min-height:84px;padding:16px;font-weight:700;display:flex}.lw-board-overlay{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);pointer-events:auto;z-index:1000;background:#0f172ab8;justify-content:center;align-items:center;padding:clamp(16px,3vw,32px);display:flex;position:fixed;inset:0}.lw-board-overlay>*{pointer-events:auto;width:100%;max-width:min(760px,96vw);max-height:min(90vh,920px);overflow:auto}.lw-board-debug{color:var(--lw-board-ink);margin-top:18px;padding:16px}.lw-board-debug summary{cursor:pointer;font-weight:900}.lw-board-debug dl{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:10px;margin:14px 0 0;display:grid}.lw-board-debug dt{color:var(--lw-board-muted);letter-spacing:.08em;text-transform:uppercase;font-size:.72rem;font-weight:900}.lw-board-debug dd{overflow-wrap:anywhere;margin:4px 0 0}.lw-digital-board.layout-focus .lw-board-grid{grid-template-columns:minmax(0,1fr)}.lw-digital-board.layout-focus .lw-board-left-rail,.lw-digital-board.layout-focus .lw-board-right-rail{order:2;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));display:grid}.lw-digital-board.layout-focus .lw-board-center-stage{order:1}.lw-digital-board.layout-split .lw-board-grid{grid-template-columns:minmax(0,1.2fr) minmax(0,1.4fr)}.lw-digital-board.layout-split .lw-board-left-rail{order:1}.lw-digital-board.layout-split .lw-board-center-stage{order:2}.lw-digital-board.layout-split .lw-board-right-rail{order:3;grid-column:1/-1}.lw-digital-board.layout-assessment .lw-board-grid{grid-template-columns:minmax(0,1fr) minmax(360px,.9fr)}.lw-digital-board.layout-assessment .lw-board-left-rail{order:1;grid-column:1/-1}.lw-digital-board.layout-assessment .lw-board-center-stage{order:2}.lw-digital-board.layout-assessment .lw-board-right-rail{order:3}@media (width<=1120px){.lw-board-grid,.lw-digital-board.layout-split .lw-board-grid,.lw-digital-board.layout-assessment .lw-board-grid{grid-template-columns:1fr}.lw-board-left-rail,.lw-board-right-rail{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));display:grid}.lw-board-slot.slot-main{min-height:480px}}@media (width<=760px){.lw-digital-board{border-radius:24px;min-height:0;padding:12px}.lw-board-header,.lw-board-left-rail,.lw-board-right-rail{grid-template-columns:1fr}.lw-board-slot.slot-main{min-height:360px}}
