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button:after{content:"";position:absolute;inset:-5px;border:2px solid transparent;border-radius:18px;pointer-events:none}.prob-v2-lesson .dice-world button.selected{border-color:var(--event);background:var(--event-soft);color:var(--event)}.prob-v2-lesson .dice-world button.selected:after{border-color:var(--event)}.prob-v2-lesson .event-readout{display:grid;gap:13px}.prob-v2-lesson .event-name{color:var(--text);font-size:15px;font-weight:750}.prob-v2-lesson .set-display{min-height:70px;padding:16px;border:1px solid var(--border);border-radius:13px;background:var(--bg);color:var(--event);font-family:JetBrains Mono,monospace;font-size:18px}.prob-v2-lesson .event-status{display:flex;align-items:center;justify-content:space-between;gap:10px;color:var(--text-muted);font-size:11px}.prob-v2-lesson .event-status strong{color:var(--text);font-size:13px}.prob-v2-lesson .map-metaphor{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;gap:12px;align-items:center}.prob-v2-lesson .map-symbol{display:grid;justify-items:center;gap:8px;color:var(--text-secondary);font-size:11px}.prob-v2-lesson .map-symbol .map,.prob-v2-lesson .map-symbol .point,.prob-v2-lesson .map-symbol .region{position:relative;display:grid;place-items:center;width:82px;height:58px;border:1px solid var(--world);border-radius:10px;background:var(--world-soft)}.prob-v2-lesson .map-symbol .point:after{content:"";width:12px;height:12px;border-radius:50%;background:var(--event)}.prob-v2-lesson .map-symbol .region:after{content:"";width:46px;height:30px;border:2px solid var(--event);border-radius:50%;background:var(--event-soft)}.prob-v2-lesson .map-arrow{color:var(--accent)}.prob-v2-lesson .model-question{display:grid;grid-template-columns:1fr auto;gap:22px;align-items:center}.prob-v2-lesson .model-comparison{display:grid;grid-template-columns:minmax(560px,1.15fr) minmax(330px,.85fr);gap:20px;align-items:stretch}.prob-v2-lesson .model-panel{padding:17px;border:1px solid var(--border);border-radius:17px;background:var(--bg-surface)}.prob-v2-lesson .model-panel h3{font-size:16px}.prob-v2-lesson .model-panel>p{color:var(--text-muted);font-size:11px}.prob-v2-lesson .pair-map{display:grid;grid-template-columns:30px repeat(6,1fr);gap:4px}.prob-v2-lesson .axis-label{display:grid;place-items:center;color:var(--text-muted);font-size:9px}.prob-v2-lesson .pair-cell{display:grid;place-items:center;min-height:43px;border:1px solid var(--border);border-radius:8px;background:var(--bg);color:var(--text-muted);font-family:JetBrains Mono,monospace;font-size:9px}.prob-v2-lesson .pair-cell.in-event{border-color:var(--event);background:var(--event-soft);color:var(--event)}.prob-v2-lesson .sum-map{display:grid;gap:6px}.prob-v2-lesson .sum-cell{display:grid;grid-template-columns:34px 1fr auto;gap:9px;align-items:center;min-height:31px;padding:4px 8px;border:1px solid var(--border);border-radius:8px;background:var(--bg)}.prob-v2-lesson .sum-cell>strong{color:var(--text);font-size:11px}.prob-v2-lesson .sum-cell .fiber{display:flex;gap:2px}.prob-v2-lesson .sum-cell .fiber i{width:100%;max-width:15px;height:7px;border-radius:999px;background:var(--border-strong)}.prob-v2-lesson .sum-cell.yes{border-color:var(--event);background:var(--event-soft)}.prob-v2-lesson .sum-cell.yes .fiber i{background:var(--event)}.prob-v2-lesson .sum-cell.mixed{border-color:var(--secondary);background:repeating-linear-gradient(135deg,var(--secondary-soft),var(--secondary-soft) 5px,transparent 5px,transparent 10px),var(--bg)}.prob-v2-lesson .sum-cell.mixed .fiber i:first-child{background:var(--event)}.prob-v2-lesson .sum-status{color:var(--text-muted);font-size:9px}.prob-v2-lesson .sum-cell.yes .sum-status{color:var(--event)}.prob-v2-lesson .sum-cell.mixed .sum-status{color:var(--secondary)}.prob-v2-lesson .model-verdict{margin:14px 0 0;padding:13px 15px;border-radius:11px;background:var(--accent-10);color:var(--text-secondary);font-size:13px;line-height:1.7}.prob-v2-lesson .model-verdict strong{color:var(--text)}.prob-v2-lesson .compression-visual{display:flex;align-items:center;justify-content:center;gap:14px}.prob-v2-lesson .compression-visual .grid-icon{display:grid;grid-template-columns:repeat(3,13px);gap:3px}.prob-v2-lesson .compression-visual .grid-icon i{width:13px;height:13px;border:1px solid var(--world);border-radius:3px;background:var(--world-soft)}.prob-v2-lesson .compression-visual .sum-icon{display:flex;gap:3px}.prob-v2-lesson .compression-visual .sum-icon i{width:9px;height:25px;border-radius:3px;background:var(--world-soft)}.prob-v2-lesson .compression-visual b{color:var(--accent);font-size:20px}@media(prefers-reduced-motion:reduce){.prob-v2-lesson button,.prob-v2-lesson .outcome-tile,.prob-v2-lesson .tree-lines line{transition:none!important}}.prob-v2-ch3{--mass: #b77d69;--mass-soft: color-mix(in srgb, var(--mass) 16%, transparent);--blue-mass: #6f92ad;--blue-soft: color-mix(in srgb, var(--blue-mass) 16%, transparent);--valid: #758f69;--valid-soft: color-mix(in srgb, var(--valid) 16%, transparent);--invalid: #a85f5f;--invalid-soft: color-mix(in srgb, var(--invalid) 14%, transparent)}.prob-v2-ch3 .weight-question{display:grid;grid-template-columns:minmax(430px,1.1fr) minmax(320px,.9fr);gap:24px;align-items:center}.prob-v2-ch3 .bag-visual{display:grid;grid-template-columns:1fr 220px;gap:18px;align-items:center}.prob-v2-ch3 .bag{position:relative;display:grid;grid-template-columns:repeat(5,1fr);gap:8px;min-height:190px;padding:26px 28px 38px;border:2px solid var(--border-strong);border-top:0;border-radius:16px 16px 48px 48px;background:var(--bg)}.prob-v2-ch3 .bag:before{content:"";position:absolute;top:-7px;left:8%;right:8%;height:13px;border:2px solid var(--border-strong);border-radius:50%;background:var(--bg-surface)}.prob-v2-ch3 .ball{display:grid;place-items:center;aspect-ratio:1;min-width:0;border:1px solid color-mix(in srgb,var(--mass) 65%,var(--bg));border-radius:50%;background:var(--mass);color:var(--bg);font-size:9px;font-weight:800}.prob-v2-ch3 .ball.blue{border-color:color-mix(in srgb,var(--blue-mass) 65%,var(--bg));background:var(--blue-mass)}.prob-v2-ch3 .bag-controls{display:grid;gap:14px}.prob-v2-ch3 .count-control{display:grid;grid-template-columns:54px 1fr 30px;gap:9px;align-items:center}.prob-v2-ch3 .count-control label{color:var(--text-secondary);font-size:12px;font-weight:700}.prob-v2-ch3 .count-control input{width:100%;accent-color:var(--accent)}.prob-v2-ch3 .count-control strong{color:var(--text);font-family:JetBrains Mono,monospace;text-align:right}.prob-v2-ch3 .category-compression{display:grid;grid-template-columns:1fr auto 1fr;gap:14px;align-items:center}.prob-v2-ch3 .category-card{padding:18px;border:1px solid var(--border);border-radius:14px;background:var(--bg-surface)}.prob-v2-ch3 .category-card>span{display:block;margin-bottom:8px;color:var(--text-muted);font-size:9px;font-weight:750;letter-spacing:.08em;text-transform:uppercase}.prob-v2-ch3 .category-card strong{color:var(--text);font-size:21px}.prob-v2-ch3 .category-card p{margin:8px 0 0;color:var(--text-secondary);font-size:12px;line-height:1.65}.prob-v2-ch3 .compression-arrow{color:var(--accent);font-size:24px}.prob-v2-ch3 .mass-bar{display:flex;height:54px;overflow:hidden;border:1px solid var(--border-strong);border-radius:12px;background:var(--bg)}.prob-v2-ch3 .mass-segment{display:grid;place-items:center;min-width:0;background:var(--mass);color:var(--bg);font-size:11px;font-weight:800;transition:width .2s ease}.prob-v2-ch3 .mass-segment.blue{background:var(--blue-mass)}.prob-v2-ch3 .normalization-board{display:grid;grid-template-columns:minmax(600px,1.25fr) minmax(280px,.75fr);gap:22px;align-items:stretch}.prob-v2-ch3 .weight-editor{padding:18px;border:1px solid var(--border);border-radius:17px;background:var(--bg-surface)}.prob-v2-ch3 .weight-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:9px;align-items:end;height:280px;margin-top:16px}.prob-v2-ch3 .weight-column{display:grid;grid-template-rows:1fr auto auto auto;gap:7px;align-items:end;height:100%;text-align:center}.prob-v2-ch3 .bar-track{display:flex;align-items:end;justify-content:center;height:100%;padding:0 8px;border-bottom:1px solid var(--border-strong)}.prob-v2-ch3 .weight-fill{width:100%;min-height:4px;border-radius:8px 8px 0 0;background:var(--mass);transition:height .2s ease}.prob-v2-ch3 .weight-column input{width:100%;accent-color:var(--mass)}.prob-v2-ch3 .weight-column strong{color:var(--text);font-size:12px}.prob-v2-ch3 .weight-column span{color:var(--text-muted);font-family:JetBrains Mono,monospace;font-size:9px}.prob-v2-ch3 .normalization-side{display:grid;gap:12px}.prob-v2-ch3 .total-card{padding:18px;border:1px solid var(--border);border-radius:15px;background:var(--bg-surface)}.prob-v2-ch3 .total-card span{display:block;color:var(--text-muted);font-size:9px;font-weight:750;letter-spacing:.08em;text-transform:uppercase}.prob-v2-ch3 .total-card strong{display:block;margin-top:5px;color:var(--text);font-size:28px}.prob-v2-ch3 .total-card p{margin:7px 0 0;color:var(--text-secondary);font-size:11px;line-height:1.6}.prob-v2-ch3 .normalization-flow{display:grid;grid-template-columns:1fr auto 1fr;gap:10px;align-items:center;padding:14px;border:1px solid var(--accent-30);border-radius:14px;background:var(--accent-10)}.prob-v2-ch3 .normalization-flow div{text-align:center}.prob-v2-ch3 .normalization-flow span{display:block;color:var(--text-muted);font-size:9px}.prob-v2-ch3 .normalization-flow strong{color:var(--text);font-family:JetBrains Mono,monospace;font-size:16px}.prob-v2-ch3 .normalization-flow i{color:var(--accent);font-style:normal}.prob-v2-ch3 .distribution-strip{display:flex;height:78px;overflow:hidden;border:1px solid var(--border-strong);border-radius:14px;background:var(--bg)}.prob-v2-ch3 .distribution-strip div{display:grid;place-items:center;min-width:0;border-right:1px solid color-mix(in srgb,var(--bg) 45%,transparent);background:var(--mass);color:var(--bg);font-size:10px;font-weight:750;transition:width .2s ease}.prob-v2-ch3 .shortcut-demo{display:grid;grid-template-columns:1fr 1fr;gap:18px}.prob-v2-ch3 .die-model{padding:19px;border:1px solid var(--border);border-radius:17px;background:var(--bg-surface)}.prob-v2-ch3 .die-model h3{font-size:16px}.prob-v2-ch3 .die-model>p{color:var(--text-muted);font-size:11px}.prob-v2-ch3 .weighted-outcomes{display:grid;grid-template-columns:repeat(6,1fr);gap:7px;align-items:end;height:210px;margin-top:14px}.prob-v2-ch3 .weighted-outcome{display:grid;grid-template-rows:1fr auto auto;gap:7px;align-items:end;height:100%;text-align:center}.prob-v2-ch3 .weight-pillar-wrap{display:flex;align-items:end;justify-content:center;height:100%}.prob-v2-ch3 .weight-pillar{width:72%;min-height:3px;border-radius:7px 7px 0 0;background:var(--blue-mass)}.prob-v2-ch3 .weighted-outcome.in-event .weight-pillar{background:var(--mass)}.prob-v2-ch3 .weighted-outcome strong{display:grid;place-items:center;width:32px;height:32px;margin:auto;border:1px solid var(--border-strong);border-radius:9px;color:var(--text);font-size:12px}.prob-v2-ch3 .weighted-outcome.in-event strong{border-color:var(--mass);background:var(--mass-soft);color:var(--mass)}.prob-v2-ch3 .weighted-outcome span{color:var(--text-muted);font-family:JetBrains Mono,monospace;font-size:9px}.prob-v2-ch3 .model-result{display:grid;grid-template-columns:1fr auto 1fr;gap:10px;align-items:center;margin-top:15px;padding:13px;border-radius:11px;background:var(--bg)}.prob-v2-ch3 .model-result div{text-align:center}.prob-v2-ch3 .model-result span{display:block;color:var(--text-muted);font-size:9px}.prob-v2-ch3 .model-result strong{color:var(--text);font-size:16px}.prob-v2-ch3 .model-result i{color:var(--accent);font-style:normal}.prob-v2-ch3 .shortcut-verdict{margin-top:14px;padding:14px;border-left:3px solid;border-radius:0 10px 10px 0;font-size:12px;line-height:1.65}.prob-v2-ch3 .shortcut-verdict.valid{border-color:var(--valid);background:var(--valid-soft);color:var(--text-secondary)}.prob-v2-ch3 .shortcut-verdict.invalid{border-color:var(--invalid);background:var(--invalid-soft);color:var(--text-secondary)}.prob-v2-ch3 .foundation-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.prob-v2-ch3 .foundation-card{padding:18px;border:1px solid var(--border);border-radius:15px;background:var(--bg-surface)}.prob-v2-ch3 .foundation-card .foundation-number{display:grid;place-items:center;width:28px;height:28px;margin-bottom:12px;border-radius:50%;background:var(--accent-18);color:var(--accent);font-size:11px;font-weight:800}.prob-v2-ch3 .foundation-card strong{color:var(--text);font-size:14px}.prob-v2-ch3 .foundation-card p{margin:7px 0 0;color:var(--text-secondary);font-size:12px;line-height:1.65}.prob-v2-ch3 .model-tester{display:grid;grid-template-columns:minmax(520px,1.15fr) minmax(300px,.85fr);gap:22px;align-items:center}.prob-v2-ch3 .test-model{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.prob-v2-ch3 .test-weight{padding:14px 8px;border:1px solid var(--border);border-radius:12px;background:var(--bg);text-align:center}.prob-v2-ch3 .test-weight span{display:block;color:var(--text-muted);font-size:9px}.prob-v2-ch3 .test-weight strong{color:var(--text);font-family:JetBrains Mono,monospace;font-size:17px}.prob-v2-ch3 .test-weight.negative{border-color:var(--invalid);background:var(--invalid-soft)}.prob-v2-ch3 .validity-panel{padding:18px;border:1px solid;border-radius:15px}.prob-v2-ch3 .validity-panel.valid{border-color:var(--valid);background:var(--valid-soft)}.prob-v2-ch3 .validity-panel.invalid{border-color:var(--invalid);background:var(--invalid-soft)}.prob-v2-ch3 .validity-panel span{display:block;color:var(--text-muted);font-size:9px;font-weight:750;letter-spacing:.08em}.prob-v2-ch3 .validity-panel strong{display:block;margin:5px 0;color:var(--text);font-size:20px}.prob-v2-ch3 .validity-panel p{margin:0;color:var(--text-secondary);font-size:12px;line-height:1.65}.prob-v2-ch3 .additivity-demo{display:grid;grid-template-columns:minmax(560px,1.2fr) minmax(300px,.8fr);gap:22px;align-items:center}.prob-v2-ch3 .weight-tiles{display:grid;grid-template-columns:repeat(6,1fr);gap:8px}.prob-v2-ch3 .weight-tiles button{display:grid;gap:7px;place-items:center;min-height:90px;border:1px solid var(--border);border-radius:13px;background:var(--bg);color:var(--text-secondary);cursor:pointer}.prob-v2-ch3 .weight-tiles button.selected{border-color:var(--mass);background:var(--mass-soft);color:var(--mass)}.prob-v2-ch3 .weight-tiles button strong{font-size:18px}.prob-v2-ch3 .weight-tiles button span{font-family:JetBrains Mono,monospace;font-size:9px}.prob-v2-ch3 .event-scale{padding:18px;border:1px solid var(--border);border-radius:15px;background:var(--bg-surface)}.prob-v2-ch3 .event-scale span{display:block;color:var(--text-muted);font-size:9px}.prob-v2-ch3 .event-scale strong{display:block;margin:7px 0 12px;color:var(--mass);font-size:28px}.prob-v2-ch3 .scale-track{height:14px;overflow:hidden;border-radius:999px;background:var(--bg-elevated)}.prob-v2-ch3 .scale-fill{height:100%;border-radius:inherit;background:var(--mass);transition:width .2s ease}@media(prefers-reduced-motion:reduce){.prob-v2-ch3 .mass-segment,.prob-v2-ch3 .weight-fill,.prob-v2-ch3 .distribution-strip div,.prob-v2-ch3 .scale-fill{transition:none!important}}.prob-v2-ch4{--set-a: #b77d69;--set-a-soft: color-mix(in srgb, var(--set-a) 17%, transparent);--set-b: #6f92ad;--set-b-soft: color-mix(in srgb, var(--set-b) 17%, transparent);--overlap: #8b7aa6;--overlap-soft: color-mix(in srgb, var(--overlap) 19%, transparent);--outside: #8a847c;--success: #758f69;--success-soft: color-mix(in srgb, var(--success) 16%, transparent);--danger: #a85f5f;--danger-soft: color-mix(in srgb, var(--danger) 14%, transparent)}.prob-v2-ch4 .set-legend{display:flex;gap:16px;align-items:center;color:var(--text-secondary);font-size:11px}.prob-v2-ch4 .set-legend span{display:flex;gap:6px;align-items:center}.prob-v2-ch4 .set-legend i{width:11px;height:11px;border-radius:3px;background:var(--set-a)}.prob-v2-ch4 .set-legend .b{background:var(--set-b)}.prob-v2-ch4 .set-legend .both{background:var(--overlap)}.prob-v2-ch4 .universe-board{padding:18px;border:1px solid var(--border);border-radius:18px;background:var(--bg-surface)}.prob-v2-ch4 .universe-label{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;color:var(--text-muted);font-size:10px;font-weight:750;letter-spacing:.08em;text-transform:uppercase}.prob-v2-ch4 .outcome-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:7px}.prob-v2-ch4 .outcome-cell{position:relative;display:grid;place-items:center;min-height:76px;overflow:hidden;border:1px solid var(--border);border-radius:12px;background:var(--bg);color:var(--text-muted);transition:border-color .18s ease,background .18s ease,opacity .18s ease,transform .18s ease}.prob-v2-ch4 .outcome-cell strong{position:relative;z-index:2;font-size:17px}.prob-v2-ch4 .outcome-cell .membership{position:absolute;right:5px;bottom:5px;left:5px;display:flex;justify-content:center;gap:3px}.prob-v2-ch4 .membership i{width:16px;height:4px;border-radius:99px;background:var(--set-a)}.prob-v2-ch4 .membership i.b{background:var(--set-b)}.prob-v2-ch4 .outcome-cell.in-a{border-color:color-mix(in srgb,var(--set-a) 60%,var(--border))}.prob-v2-ch4 .outcome-cell.in-b{border-color:color-mix(in srgb,var(--set-b) 60%,var(--border))}.prob-v2-ch4 .outcome-cell.in-a.in-b{border-color:var(--overlap)}.prob-v2-ch4 .outcome-cell.selected{border-color:var(--overlap);background:var(--overlap-soft);color:var(--text);transform:translateY(-3px)}.prob-v2-ch4 .outcome-cell.dimmed{opacity:.32}.prob-v2-ch4 .selection-readout{display:grid;grid-template-columns:minmax(280px,.75fr) minmax(460px,1.25fr);gap:14px;align-items:center;margin-top:14px}.prob-v2-ch4 .logic-token{padding:15px 17px;border-radius:13px;background:var(--overlap-soft)}.prob-v2-ch4 .logic-token span{display:block;color:var(--text-muted);font-size:9px;text-transform:uppercase}.prob-v2-ch4 .logic-token strong{display:block;margin-top:4px;color:var(--text);font-size:17px}.prob-v2-ch4 .selection-readout>p{margin:0;color:var(--text-secondary);font-size:13px;line-height:1.65}.prob-v2-ch4 .lens-row{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.prob-v2-ch4 .lens-row button{min-height:67px;padding:10px;border:1px solid var(--border);border-radius:12px;background:var(--bg);color:var(--text-secondary);cursor:pointer}.prob-v2-ch4 .lens-row button strong,.prob-v2-ch4 .lens-row button span{display:block}.prob-v2-ch4 .lens-row button strong{color:var(--text);font-size:14px}.prob-v2-ch4 .lens-row button span{margin-top:3px;font-size:9px}.prob-v2-ch4 .lens-row button.active{border-color:var(--overlap);background:var(--overlap-soft)}.prob-v2-ch4 .prediction-board{display:grid;grid-template-columns:minmax(500px,1fr) auto;gap:24px;align-items:center}.prob-v2-ch4 .receipt{display:grid;grid-template-columns:1fr 70px 1fr;gap:12px;align-items:stretch}.prob-v2-ch4 .receipt-column{padding:17px;border:1px solid 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auto;gap:24px;align-items:center}.prob-v2-ch5 .tree-canvas{padding:18px;border:1px solid var(--border);border-radius:18px;background:var(--bg-surface)}.prob-v2-ch5 .tree-canvas svg{display:block;width:100%;height:330px}.prob-v2-ch5 .tree-edge{fill:none;stroke:var(--border-strong);stroke-width:2;transition:stroke .18s ease,opacity .18s ease}.prob-v2-ch5 .tree-edge.r{stroke:var(--branch-r)}.prob-v2-ch5 .tree-edge.b{stroke:var(--branch-b)}.prob-v2-ch5 .tree-edge.active{stroke:var(--path);stroke-width:5}.prob-v2-ch5 .tree-edge.hidden,.prob-v2-ch5 .tree-node.hidden,.prob-v2-ch5 .tree-label.hidden{opacity:.16}.prob-v2-ch5 .tree-node{fill:var(--bg);stroke:var(--border-strong);stroke-width:2;transition:opacity .18s ease}.prob-v2-ch5 .tree-node.r{fill:var(--branch-r-soft);stroke:var(--branch-r)}.prob-v2-ch5 .tree-node.b{fill:var(--branch-b-soft);stroke:var(--branch-b)}.prob-v2-ch5 .tree-node.leaf{cursor:pointer}.prob-v2-ch5 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span{display:block;color:var(--text-muted);font-size:9px}.prob-v2-ch5 .state-equation strong{color:var(--text);font-size:17px}.prob-v2-ch5 .state-equation i{color:var(--accent);font-style:normal}.prob-v2-ch5 .leaf-distribution{padding:18px;border:1px solid var(--border);border-radius:17px;background:var(--bg-surface)}.prob-v2-ch5 .leaf-bars{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;align-items:end;height:265px;margin-top:14px}.prob-v2-ch5 .leaf-bar{display:grid;grid-template-rows:1fr auto auto;gap:7px;align-items:end;height:100%;text-align:center}.prob-v2-ch5 .leaf-bar-track{display:flex;align-items:end;height:100%;border-bottom:1px solid var(--border-strong)}.prob-v2-ch5 .leaf-bar-fill{width:100%;min-height:4px;border-radius:8px 8px 0 0;background:var(--path);transition:height .2s ease}.prob-v2-ch5 .leaf-bar strong{color:var(--text);font-size:14px}.prob-v2-ch5 .leaf-bar span{color:var(--text-muted);font-family:JetBrains Mono,monospace;font-size:9px}.prob-v2-ch5 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.event-tray>span{color:var(--text-muted);font-size:9px;font-weight:750;letter-spacing:.08em;text-transform:uppercase}.prob-v2-ch5 .event-tray>strong{margin:6px 0 15px;color:var(--text);font-size:26px}.prob-v2-ch5 .tray-pieces{display:flex;height:64px;overflow:hidden;border-radius:12px;background:var(--bg)}.prob-v2-ch5 .tray-pieces div{display:grid;place-items:center;min-width:0;background:var(--path);color:var(--bg);font-size:10px;font-weight:750}.prob-v2-ch5 .tray-pieces div.tray-rest{flex:1;background:var(--bg);color:var(--text-muted)}.prob-v2-ch5 .event-tray p{margin:13px 0 0;color:var(--text-secondary);font-size:12px;line-height:1.65}.prob-v2-ch5 .operation-map{display:grid;grid-template-columns:1fr auto 1fr;gap:14px;align-items:center;padding:18px;border:1px solid var(--accent-30);border-radius:16px;background:var(--accent-10)}.prob-v2-ch5 .operation-map div{text-align:center}.prob-v2-ch5 .operation-map span{display:block;color:var(--text-muted);font-size:9px}.prob-v2-ch5 .operation-map strong{display:block;margin-top:4px;color:var(--text);font-size:16px}.prob-v2-ch5 .operation-map i{color:var(--accent);font-style:normal}@media(prefers-reduced-motion:reduce){.prob-v2-ch5 .tree-edge,.prob-v2-ch5 .tree-node,.prob-v2-ch5 .tree-label,.prob-v2-ch5 .first-world,.prob-v2-ch5 .second-world,.prob-v2-ch5 .leaf-bar-fill{transition:none!important}}.prob-v2-ch6{--count-a: #b77d69;--count-a-soft: color-mix(in srgb, var(--count-a) 17%, transparent);--count-b: #6f92ad;--count-b-soft: color-mix(in srgb, var(--count-b) 17%, transparent);--count-c: #8b9c72;--count-c-soft: color-mix(in srgb, var(--count-c) 17%, transparent);--cluster: #8b7aa6;--cluster-soft: color-mix(in srgb, var(--cluster) 18%, transparent);--success: #758f69;--success-soft: color-mix(in srgb, var(--success) 16%, transparent)}.prob-v2-ch6 .count-question{display:grid;grid-template-columns:minmax(520px,1fr) auto;gap:24px;align-items:center}.prob-v2-ch6 .layer-controls{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.prob-v2-ch6 .layer-control{padding:14px;border:1px solid var(--border);border-radius:13px;background:var(--bg)}.prob-v2-ch6 .layer-control label,.prob-v2-ch6 .layer-control span{display:block}.prob-v2-ch6 .layer-control label{color:var(--text);font-size:12px;font-weight:750}.prob-v2-ch6 .layer-control span{margin-top:4px;color:var(--text-muted);font-size:9px}.prob-v2-ch6 .layer-control input{width:100%;margin-top:10px;accent-color:var(--accent)}.prob-v2-ch6 .compressed-tree{display:grid;grid-template-columns:1fr auto 1fr auto 1fr auto minmax(160px,.8fr);gap:10px;align-items:center;padding:20px;border:1px solid var(--border);border-radius:17px;background:var(--bg-surface)}.prob-v2-ch6 .tree-layer{display:grid;place-items:center;min-height:116px;padding:14px;border:1px solid var(--border);border-radius:14px;background:var(--bg);text-align:center}.prob-v2-ch6 .tree-layer.a{border-color:var(--count-a);background:var(--count-a-soft)}.prob-v2-ch6 .tree-layer.b{border-color:var(--count-b);background:var(--count-b-soft)}.prob-v2-ch6 .tree-layer.c{border-color:var(--count-c);background:var(--count-c-soft)}.prob-v2-ch6 .tree-layer span{color:var(--text-muted);font-size:9px}.prob-v2-ch6 .tree-layer strong{display:block;margin:5px 0;color:var(--text);font-size:25px}.prob-v2-ch6 .tree-layer small{color:var(--text-secondary);font-size:9px}.prob-v2-ch6 .layer-times{color:var(--accent);font-size:22px}.prob-v2-ch6 .leaf-total{display:grid;place-items:center;min-height:116px;padding:14px;border:1px solid var(--cluster);border-radius:14px;background:var(--cluster-soft);text-align:center}.prob-v2-ch6 .leaf-total span{color:var(--text-muted);font-size:9px}.prob-v2-ch6 .leaf-total strong{display:block;margin-top:6px;color:var(--text);font-size:30px}.prob-v2-ch6 .path-samples{display:grid;grid-template-columns:repeat(8,1fr);gap:6px;max-height:190px;overflow:hidden;padding:13px;border:1px solid var(--border);border-radius:14px;background:var(--bg-surface)}.prob-v2-ch6 .sample-path{display:grid;place-items:center;min-height:48px;border:1px solid var(--border);border-radius:9px;background:var(--bg);color:var(--text-secondary);font-family:JetBrains Mono,monospace;font-size:9px}.prob-v2-ch6 .sample-path.more{border-style:dashed;color:var(--accent)}.prob-v2-ch6 .range-board{display:grid;grid-template-columns:1fr 1fr;gap:14px}.prob-v2-ch6 .range-control{display:grid;grid-template-columns:auto 1fr 44px;gap:12px;align-items:center;padding:15px;border:1px solid var(--border);border-radius:13px;background:var(--bg)}.prob-v2-ch6 .range-control label{color:var(--text-secondary);font-size:12px;font-weight:700}.prob-v2-ch6 .range-control input{width:100%;accent-color:var(--accent)}.prob-v2-ch6 .range-control strong{color:var(--text);font-family:JetBrains Mono,monospace;text-align:right}.prob-v2-ch6 .slot-board{display:grid;grid-template-columns:minmax(620px,1.25fr) minmax(300px,.75fr);gap:20px;align-items:stretch}.prob-v2-ch6 .ordered-slots{display:grid;align-content:center;padding:18px;border:1px solid var(--border);border-radius:17px;background:var(--bg-surface)}.prob-v2-ch6 .slot-row{display:grid;grid-template-columns:repeat(4,1fr);gap:9px;min-height:176px}.prob-v2-ch6 .role-slot{display:grid;align-content:center;min-width:0;padding:14px;border:1px solid var(--border);border-radius:14px;background:var(--bg);text-align:center}.prob-v2-ch6 .role-slot.inactive{opacity:.2}.prob-v2-ch6 .role-slot span{color:var(--text-muted);font-size:9px}.prob-v2-ch6 .role-slot strong{display:block;margin:6px 0;color:var(--text);font-size:26px}.prob-v2-ch6 .role-slot small{color:var(--text-secondary);font-size:10px}.prob-v2-ch6 .permutation-result{display:grid;align-content:center;padding:20px;border:1px solid var(--cluster);border-radius:17px;background:var(--cluster-soft)}.prob-v2-ch6 .permutation-result span{color:var(--text-muted);font-size:9px;text-transform:uppercase}.prob-v2-ch6 .permutation-result strong{display:block;margin:6px 0;color:var(--text);font-size:31px}.prob-v2-ch6 .permutation-result p{margin:0;color:var(--text-secondary);font-size:12px;line-height:1.65}.prob-v2-ch6 .swap-comparison{display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:center}.prob-v2-ch6 .arrangement-card{display:flex;justify-content:center;gap:8px;padding:17px;border:1px solid var(--border);border-radius:14px;background:var(--bg-surface)}.prob-v2-ch6 .arrangement-card i{display:grid;place-items:center;width:48px;height:48px;border-radius:12px;background:var(--count-a-soft);color:var(--text);font-style:normal;font-weight:800}.prob-v2-ch6 .swap-comparison>i{color:var(--accent);font-style:normal}.prob-v2-ch6 .arrangement-samples{display:flex;flex-wrap:wrap;gap:6px}.prob-v2-ch6 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auto;gap:20px;align-items:center}.prob-v2-ch6 .labeled-paths{display:grid;grid-template-columns:repeat(6,1fr);gap:8px}.prob-v2-ch6 .labeled-path{padding:15px 8px;border:1px solid var(--border);border-radius:12px;background:var(--bg);text-align:center}.prob-v2-ch6 .labeled-path strong,.prob-v2-ch6 .labeled-path span{display:block}.prob-v2-ch6 .labeled-path strong{color:var(--text);font-family:JetBrains Mono,monospace;font-size:14px}.prob-v2-ch6 .labeled-path span{margin-top:5px;color:var(--text-muted);font-size:9px}.prob-v2-ch6 .labeled-path.merged{border-color:var(--cluster);background:var(--cluster-soft)}.prob-v2-ch6 .repeat-buckets{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.prob-v2-ch6 .repeat-bucket{padding:18px;border:1px solid var(--border);border-radius:15px;background:var(--bg-surface);cursor:pointer;text-align:center}.prob-v2-ch6 .repeat-bucket.active{border-color:var(--cluster);background:var(--cluster-soft)}.prob-v2-ch6 .repeat-bucket strong{display:block;color:var(--text);font-family:JetBrains Mono,monospace;font-size:23px}.prob-v2-ch6 .repeat-bucket span{display:block;margin-top:5px;color:var(--text-muted);font-size:9px}.prob-v2-ch6 .birthday-prediction{display:grid;grid-template-columns:minmax(520px,1fr) auto;gap:24px;align-items:center}.prob-v2-ch6 .birthday-board{display:grid;grid-template-columns:minmax(620px,1.2fr) minmax(320px,.8fr);gap:20px;align-items:stretch}.prob-v2-ch6 .birthday-chart{padding:18px;border:1px solid var(--border);border-radius:17px;background:var(--bg-surface)}.prob-v2-ch6 .birthday-chart svg{display:block;width:100%;height:280px;margin-top:8px}.prob-v2-ch6 .chart-axis{stroke:var(--border-strong);stroke-width:1}.prob-v2-ch6 .chart-guide{stroke:var(--border);stroke-width:1;stroke-dasharray:5 5}.prob-v2-ch6 .chart-curve{fill:none;stroke:var(--cluster);stroke-width:4}.prob-v2-ch6 .chart-area{fill:var(--cluster-soft)}.prob-v2-ch6 .chart-marker{fill:var(--bg);stroke:var(--cluster);stroke-width:4}.prob-v2-ch6 .chart-text{fill:var(--text-muted);font-size:10px}.prob-v2-ch6 .birthday-stats{display:grid;gap:10px}.prob-v2-ch6 .birthday-stat{padding:17px;border:1px solid var(--border);border-radius:14px;background:var(--bg-surface)}.prob-v2-ch6 .birthday-stat span{display:block;color:var(--text-muted);font-size:9px;letter-spacing:.07em;text-transform:uppercase}.prob-v2-ch6 .birthday-stat strong{display:block;margin:5px 0;color:var(--text);font-size:25px}.prob-v2-ch6 .birthday-stat p{margin:0;color:var(--text-secondary);font-size:11px;line-height:1.6}.prob-v2-ch6 .birthday-stat.highlight{border-color:var(--cluster);background:var(--cluster-soft)}.prob-v2-ch6 .people-control{display:grid;grid-template-columns:auto 1fr 80px;gap:14px;align-items:center;padding:15px 18px;border:1px solid var(--border);border-radius:14px;background:var(--bg-surface)}.prob-v2-ch6 .people-control label{color:var(--text-secondary);font-size:12px;font-weight:700}.prob-v2-ch6 .people-control input{width:100%;accent-color:var(--cluster)}.prob-v2-ch6 .people-control strong{color:var(--text);text-align:right}.prob-v2-ch6 .available-days{display:flex;gap:6px;overflow:hidden}.prob-v2-ch6 .available-days span{min-width:76px;padding:11px 8px;border:1px solid var(--border);border-radius:10px;background:var(--bg);color:var(--text-secondary);font-family:JetBrains Mono,monospace;font-size:9px;text-align:center}@media(prefers-reduced-motion:reduce){.prob-v2-ch6 *{scroll-behavior:auto!important;transition:none!important}}.prob-v2-ch7{--success: #758f69;--success-soft: color-mix(in srgb, var(--success) 17%, transparent);--failure: #a85f5f;--failure-soft: color-mix(in srgb, var(--failure) 15%, transparent);--count: #8b7aa6;--count-soft: color-mix(in srgb, var(--count) 18%, transparent);--neutral: #6f92ad;--neutral-soft: color-mix(in srgb, var(--neutral) 16%, transparent)}.prob-v2-ch7 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var(--border);border-radius:17px;background:var(--bg-surface)}.prob-v2-ch7 .reliability-strip{display:flex;height:120px;overflow:hidden;margin-top:16px;border:1px solid var(--border-strong);border-radius:15px;background:var(--bg)}.prob-v2-ch7 .success-mass,.prob-v2-ch7 .failure-mass{display:grid;place-items:center;min-width:0;overflow:hidden;color:var(--bg);font-size:11px;font-weight:750;text-align:center;transition:width .2s ease}.prob-v2-ch7 .success-mass{background:var(--success)}.prob-v2-ch7 .failure-mass{background:var(--failure)}.prob-v2-ch7 .decay-steps{display:grid;grid-template-columns:repeat(10,1fr);gap:7px;align-items:end;height:155px;margin-top:18px}.prob-v2-ch7 .decay-step{display:grid;grid-template-rows:1fr auto;gap:6px;align-items:end;height:100%;text-align:center}.prob-v2-ch7 .decay-track{display:flex;align-items:end;height:100%;border-bottom:1px solid var(--border-strong)}.prob-v2-ch7 .decay-fill{width:100%;min-height:3px;border-radius:7px 7px 0 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var(--border);border-radius:13px;background:var(--bg);color:var(--text-secondary);cursor:pointer;text-align:left}.prob-v2-ch7 .scenario-tabs button strong,.prob-v2-ch7 .scenario-tabs button span{display:block}.prob-v2-ch7 .scenario-tabs button strong{color:var(--text);font-size:13px}.prob-v2-ch7 .scenario-tabs button span{margin-top:4px;font-size:9px}.prob-v2-ch7 .scenario-tabs button.active{border-color:var(--count);background:var(--count-soft)}.prob-v2-ch7 .strategy-board{display:grid;grid-template-columns:1fr 1fr;gap:16px}.prob-v2-ch7 .strategy-option{padding:19px;border:1px solid var(--border);border-radius:16px;background:var(--bg-surface);cursor:pointer}.prob-v2-ch7 .strategy-option.selected{border-color:var(--count);background:var(--count-soft)}.prob-v2-ch7 .strategy-option.recommended{box-shadow:inset 0 0 0 2px var(--success)}.prob-v2-ch7 .strategy-option>span{display:block;color:var(--text-muted);font-size:9px;letter-spacing:.07em;text-transform:uppercase}.prob-v2-ch7 .strategy-option h3{margin-top:7px}.prob-v2-ch7 .category-row{display:flex;gap:6px;min-height:50px;margin:13px 0}.prob-v2-ch7 .category-row i{display:grid;place-items:center;min-width:44px;padding:8px;border:1px solid var(--border);border-radius:9px;background:var(--bg);color:var(--text-secondary);font-style:normal;font-size:10px}.prob-v2-ch7 .cost-meter{height:9px;overflow:hidden;border-radius:99px;background:var(--bg)}.prob-v2-ch7 .cost-meter div{height:100%;border-radius:inherit;background:var(--count)}.prob-v2-ch7 .strategy-option p{margin:11px 0 0;color:var(--text-secondary);font-size:12px;line-height:1.65}.prob-v2-ch7 .strategy-feedback{padding:18px;border-left:3px solid var(--accent);border-radius:0 13px 13px 0;background:var(--accent-10);color:var(--text-secondary);font-size:13px;line-height:1.7}@media(prefers-reduced-motion:reduce){.prob-v2-ch7 .count-tile,.prob-v2-ch7 .success-mass,.prob-v2-ch7 .failure-mass,.prob-v2-ch7 .decay-fill{transition:none!important}}.prob-v2-ch8{--condition: #6f92ad;--condition-soft: color-mix(in srgb, var(--condition) 17%, transparent);--target: #b77d69;--target-soft: color-mix(in srgb, var(--target) 17%, transparent);--overlap: #788f69;--overlap-soft: color-mix(in srgb, var(--overlap) 18%, transparent);--discarded: #8d8580}.prob-v2-ch8 .condition-prediction,.prob-v2-ch8 .direction-prediction{display:grid;grid-template-columns:minmax(520px,1fr) auto;gap:24px;align-items:center}.prob-v2-ch8 .condition-controls{display:grid;grid-template-columns:minmax(560px,1fr) auto;gap:18px;align-items:center;padding:17px 19px;border:1px solid var(--border);border-radius:15px;background:var(--bg-surface)}.prob-v2-ch8 .condition-slider{display:grid;grid-template-columns:190px 1fr 120px;gap:14px;align-items:center}.prob-v2-ch8 .condition-slider label{color:var(--text-secondary);font-size:12px;font-weight:700}.prob-v2-ch8 .condition-slider input{width:100%;accent-color:var(--condition)}.prob-v2-ch8 .condition-slider strong{color:var(--text);font-family:JetBrains Mono,monospace;font-size:12px;text-align:right}.prob-v2-ch8 .world-comparison{display:grid;grid-template-columns:1fr auto 1fr;gap:14px;align-items:stretch}.prob-v2-ch8 .world-panel{padding:19px;border:1px solid var(--border);border-radius:17px;background:var(--bg-surface)}.prob-v2-ch8 .world-panel.conditioned{border-color:var(--condition);background:var(--condition-soft)}.prob-v2-ch8 .world-panel h3{min-height:54px}.prob-v2-ch8 .world-arrow{display:grid;place-items:center;width:76px;color:var(--condition);font-size:11px;font-weight:750;text-align:center}.prob-v2-ch8 .dice-world{display:grid;grid-template-columns:repeat(6,1fr);gap:8px}.prob-v2-ch8 .dice-world.conditioned-world{grid-template-columns:repeat(var(--remaining-count),1fr)}.prob-v2-ch8 .dice-outcome{display:grid;place-items:center;min-height:104px;border:1px solid var(--border);border-radius:12px;background:var(--bg);color:var(--text-muted);text-align:center}.prob-v2-ch8 .dice-outcome strong{color:var(--text);font-size:21px}.prob-v2-ch8 .dice-outcome span{font-size:9px}.prob-v2-ch8 .dice-outcome.target{border-color:var(--target);background:var(--target-soft)}.prob-v2-ch8 .dice-outcome.discarded{border-style:dashed;opacity:.24}.prob-v2-ch8 .world-stat{display:grid;grid-template-columns:1fr auto;gap:12px;align-items:center;margin-top:14px;padding-top:13px;border-top:1px solid var(--border)}.prob-v2-ch8 .world-stat span{color:var(--text-secondary);font-size:11px}.prob-v2-ch8 .world-stat strong{color:var(--text);font-size:22px}.prob-v2-ch8 .renormalize-map{display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:center;padding:17px;border:1px solid var(--accent-30);border-radius:15px;background:var(--accent-10)}.prob-v2-ch8 .renormalize-map div{text-align:center}.prob-v2-ch8 .renormalize-map span{display:block;color:var(--text-muted);font-size:9px}.prob-v2-ch8 .renormalize-map strong{display:block;margin-top:5px;color:var(--text);font-size:16px}.prob-v2-ch8 .renormalize-map i{color:var(--condition);font-style:normal;font-weight:750}.prob-v2-ch8 .direction-board{display:grid;grid-template-columns:minmax(590px,1.15fr) minmax(340px,.85fr);gap:18px;align-items:stretch}.prob-v2-ch8 .population-panel,.prob-v2-ch8 .zoom-panel{padding:19px;border:1px solid var(--border);border-radius:17px;background:var(--bg-surface)}.prob-v2-ch8 .population-grid{display:grid;grid-template-columns:repeat(10,1fr);gap:6px;margin-top:14px}.prob-v2-ch8 .person-tile{display:grid;place-items:center;min-height:39px;border:1px solid var(--border);border-radius:8px;background:var(--bg);color:var(--text-muted);font-size:8px}.prob-v2-ch8 .person-tile.in-condition{border-color:var(--condition);box-shadow:inset 0 0 0 1px var(--condition)}.prob-v2-ch8 .person-tile.in-intersection{border-color:var(--overlap);background:var(--overlap-soft);color:var(--text)}.prob-v2-ch8 .person-tile.outside-condition{opacity:.2}.prob-v2-ch8 .population-legend{display:flex;gap:16px;margin-top:13px;color:var(--text-secondary);font-size:10px}.prob-v2-ch8 .population-legend i{display:inline-block;width:11px;height:11px;margin-right:5px;border:1px solid var(--condition);border-radius:3px;vertical-align:-1px}.prob-v2-ch8 .population-legend i.overlap{border-color:var(--overlap);background:var(--overlap-soft)}.prob-v2-ch8 .zoom-panel{display:grid;align-content:center;border-color:var(--condition);background:var(--condition-soft)}.prob-v2-ch8 .given-expression{display:grid;grid-template-columns:1fr auto 1fr;gap:10px;align-items:center;margin:14px 0}.prob-v2-ch8 .given-expression div{padding:15px 10px;border:1px solid var(--border);border-radius:11px;background:var(--bg);text-align:center}.prob-v2-ch8 .given-expression span{display:block;color:var(--text-muted);font-size:8px}.prob-v2-ch8 .given-expression strong{display:block;margin-top:5px;color:var(--text);font-size:19px}.prob-v2-ch8 .given-expression i{color:var(--condition);font-style:normal}.prob-v2-ch8 .direction-result{color:var(--text);font-size:32px;font-weight:780}.prob-v2-ch8 .nested-controls{display:grid;grid-template-columns:1fr 1fr;gap:12px}.prob-v2-ch8 .nested-control{display:grid;grid-template-columns:160px 1fr 62px;gap:12px;align-items:center;padding:15px;border:1px solid var(--border);border-radius:13px;background:var(--bg)}.prob-v2-ch8 .nested-control label{color:var(--text-secondary);font-size:11px;font-weight:700}.prob-v2-ch8 .nested-control input{width:100%;accent-color:var(--condition)}.prob-v2-ch8 .nested-control strong{color:var(--text);font-family:JetBrains Mono,monospace;text-align:right}.prob-v2-ch8 .nested-board{display:grid;grid-template-columns:minmax(650px,1.25fr) minmax(310px,.75fr);gap:18px;align-items:stretch}.prob-v2-ch8 .nested-canvas{position:relative;min-height:350px;overflow:hidden;border:1px solid var(--border-strong);border-radius:18px;background:linear-gradient(var(--border) 1px,transparent 1px),linear-gradient(90deg,var(--border) 1px,transparent 1px),var(--bg-surface);background-size:10% 10%}.prob-v2-ch8 .whole-label{position:absolute;top:15px;right:17px;color:var(--text-muted);font-size:9px}.prob-v2-ch8 .condition-area{position:absolute;inset:0 auto 0 0;overflow:hidden;border-right:3px solid var(--condition);background:var(--condition-soft);transition:width .2s ease}.prob-v2-ch8 .condition-area>span{position:absolute;top:15px;left:17px;color:var(--condition);font-size:10px;font-weight:750;white-space:nowrap}.prob-v2-ch8 .intersection-area{position:absolute;inset:auto 0 0;display:grid;place-items:center;border-top:3px solid var(--overlap);background:var(--overlap);color:var(--bg);transition:height .2s ease}.prob-v2-ch8 .intersection-area strong{font-size:24px}.prob-v2-ch8 .intersection-area span{font-size:9px}.prob-v2-ch8 .nested-readout{display:grid;gap:10px}.prob-v2-ch8 .nested-stat{padding:17px;border:1px solid var(--border);border-radius:14px;background:var(--bg-surface)}.prob-v2-ch8 .nested-stat span{display:block;color:var(--text-muted);font-size:9px}.prob-v2-ch8 .nested-stat strong{display:block;margin:6px 0;color:var(--text);font-size:26px}.prob-v2-ch8 .nested-stat p{margin:0;color:var(--text-secondary);font-size:11px;line-height:1.55}.prob-v2-ch8 .nested-stat.highlight{border-color:var(--overlap);background:var(--overlap-soft)}.prob-v2-ch8 .information-tabs{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}.prob-v2-ch8 .information-tabs button{padding:15px;border:1px solid var(--border);border-radius:13px;background:var(--bg);color:var(--text-secondary);cursor:pointer;text-align:left}.prob-v2-ch8 .information-tabs button strong,.prob-v2-ch8 .information-tabs button span{display:block}.prob-v2-ch8 .information-tabs button strong{color:var(--text);font-size:13px}.prob-v2-ch8 .information-tabs button span{margin-top:4px;font-size:9px}.prob-v2-ch8 .information-tabs button.active{border-color:var(--condition);background:var(--condition-soft)}.prob-v2-ch8 .bag-condition-board{display:grid;grid-template-columns:minmax(580px,1.15fr) minmax(350px,.85fr);gap:18px;align-items:stretch}.prob-v2-ch8 .bag-history,.prob-v2-ch8 .bag-result{padding:20px;border:1px solid var(--border);border-radius:17px;background:var(--bg-surface)}.prob-v2-ch8 .bag-stage{display:flex;gap:14px;align-items:center;min-height:150px;margin-top:14px;padding:18px;border:1px dashed var(--border-strong);border-radius:50% 50% 18px 18px;background:var(--bg)}.prob-v2-ch8 .condition-ball{display:grid;place-items:center;width:58px;height:58px;border:2px solid color-mix(in srgb,var(--target) 72%,var(--text));border-radius:50%;background:var(--target-soft);color:var(--text);font-weight:800}.prob-v2-ch8 .condition-ball.blue{border-color:var(--condition);background:var(--condition-soft)}.prob-v2-ch8 .drawn-ball{margin-right:12px;outline:3px solid var(--accent);outline-offset:4px}.prob-v2-ch8 .mixture-history{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:14px}.prob-v2-ch8 .mixture-history div{padding:14px;border:1px solid var(--border);border-radius:11px;background:var(--bg);color:var(--text-secondary);font-size:11px;line-height:1.55}.prob-v2-ch8 .mixture-history strong{display:block;margin-bottom:5px;color:var(--text)}.prob-v2-ch8 .bag-result{display:grid;align-content:center;border-color:var(--target);background:var(--target-soft)}.prob-v2-ch8 .bag-result>strong{display:block;margin:8px 0;color:var(--text);font-size:37px}.prob-v2-ch8 .bag-result p{color:var(--text-secondary);font-size:12px;line-height:1.65}.prob-v2-ch8 .transfer-check{display:grid;grid-template-columns:1fr auto;gap:18px;align-items:center;padding:19px;border:1px solid var(--border);border-radius:16px;background:var(--bg-surface)}@media(prefers-reduced-motion:reduce){.prob-v2-ch8 .condition-area,.prob-v2-ch8 .intersection-area{transition:none!important}}.prob-v2-ch9{--event-a: #b77d69;--event-a-soft: color-mix(in srgb, var(--event-a) 17%, transparent);--condition: #6f92ad;--condition-soft: color-mix(in srgb, var(--condition) 17%, transparent);--stable: #788f69;--stable-soft: color-mix(in srgb, var(--stable) 18%, transparent);--changed: #a85f5f;--changed-soft: color-mix(in srgb, var(--changed) 16%, transparent)}.prob-v2-ch9 .independence-prediction{display:grid;grid-template-columns:minmax(520px,1fr) auto;gap:22px;align-items:center}.prob-v2-ch9 .ratio-worlds{display:grid;grid-template-columns:1fr auto 1fr;gap:14px;align-items:stretch}.prob-v2-ch9 .ratio-panel{padding:19px;border:1px solid var(--border);border-radius:17px;background:var(--bg-surface)}.prob-v2-ch9 .ratio-panel.conditioned{border-color:var(--condition);background:var(--condition-soft)}.prob-v2-ch9 .ratio-arrow{display:grid;place-items:center;width:74px;color:var(--condition);font-size:11px;font-weight:750;text-align:center}.prob-v2-ch9 .path-world{display:grid;grid-template-columns:repeat(var(--path-count),1fr);gap:9px;margin-top:14px}.prob-v2-ch9 .path-tile{display:grid;place-items:center;min-height:112px;border:1px solid var(--border);border-radius:12px;background:var(--bg);color:var(--text-muted);text-align:center}.prob-v2-ch9 .path-tile strong{color:var(--text);font-family:JetBrains Mono,monospace;font-size:18px}.prob-v2-ch9 .path-tile span{font-size:9px}.prob-v2-ch9 .path-tile.in-a{border-color:var(--event-a);background:var(--event-a-soft)}.prob-v2-ch9 .path-tile.discarded{border-style:dashed;opacity:.2}.prob-v2-ch9 .ratio-readout{display:grid;grid-template-columns:1fr auto;gap:12px;align-items:center;margin-top:14px;padding-top:13px;border-top:1px solid var(--border)}.prob-v2-ch9 .ratio-readout span{color:var(--text-secondary);font-size:11px}.prob-v2-ch9 .ratio-readout strong{color:var(--text);font-size:23px}.prob-v2-ch9 .invariant-badge{display:grid;place-items:center;padding:17px;border:1px solid var(--stable);border-radius:15px;background:var(--stable-soft);color:var(--text);text-align:center}.prob-v2-ch9 .invariant-badge span{color:var(--text-secondary);font-size:10px}.prob-v2-ch9 .invariant-badge strong{display:block;margin-top:5px;font-size:19px}.prob-v2-ch9 .scenario-tabs{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}.prob-v2-ch9 .scenario-tabs button{padding:15px;border:1px solid var(--border);border-radius:13px;background:var(--bg);color:var(--text-secondary);cursor:pointer;text-align:left}.prob-v2-ch9 .scenario-tabs button strong,.prob-v2-ch9 .scenario-tabs button span{display:block}.prob-v2-ch9 .scenario-tabs button strong{color:var(--text);font-size:13px}.prob-v2-ch9 .scenario-tabs button span{margin-top:4px;font-size:9px}.prob-v2-ch9 .scenario-tabs button.active{border-color:var(--condition);background:var(--condition-soft)}.prob-v2-ch9 .concept-check-board{display:grid;grid-template-columns:minmax(590px,1.15fr) minmax(340px,.85fr);gap:18px}.prob-v2-ch9 .outcome-checker,.prob-v2-ch9 .concept-verdict{padding:19px;border:1px solid var(--border);border-radius:17px;background:var(--bg-surface)}.prob-v2-ch9 .checker-row{display:grid;grid-template-columns:repeat(var(--outcome-count),1fr);gap:8px;margin-top:14px}.prob-v2-ch9 .checker-cell{display:grid;place-items:center;min-height:78px;border:1px solid var(--border);border-radius:10px;background:var(--bg);color:var(--text-muted);text-align:center}.prob-v2-ch9 .checker-cell.in-a{border-color:var(--event-a);background:var(--event-a-soft)}.prob-v2-ch9 .checker-cell.in-b{box-shadow:inset 0 -4px 0 var(--condition)}.prob-v2-ch9 .checker-cell.in-b:after{content:"B";color:var(--condition);font-size:8px}.prob-v2-ch9 .checker-cell.in-both{outline:2px solid var(--stable);outline-offset:-4px}.prob-v2-ch9 .condition-ratios{display:grid;grid-template-columns:1fr auto 1fr;gap:9px;align-items:center;margin-top:15px}.prob-v2-ch9 .condition-ratios div{padding:13px;border:1px solid var(--border);border-radius:10px;background:var(--bg);text-align:center}.prob-v2-ch9 .condition-ratios span{display:block;color:var(--text-muted);font-size:8px}.prob-v2-ch9 .condition-ratios strong{display:block;margin-top:5px;color:var(--text);font-size:18px}.prob-v2-ch9 .condition-ratios i{color:var(--condition);font-style:normal}.prob-v2-ch9 .concept-verdict{display:grid;align-content:center}.prob-v2-ch9 .concept-verdict.independent{border-color:var(--stable);background:var(--stable-soft)}.prob-v2-ch9 .concept-verdict.dependent{border-color:var(--changed);background:var(--changed-soft)}.prob-v2-ch9 .verdict-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin:13px 0}.prob-v2-ch9 .verdict-grid div{padding:13px;border:1px solid var(--border);border-radius:10px;background:var(--bg)}.prob-v2-ch9 .verdict-grid span{display:block;color:var(--text-muted);font-size:8px}.prob-v2-ch9 .verdict-grid strong{display:block;margin-top:5px;color:var(--text);font-size:14px}.prob-v2-ch9 .population-buttons{display:flex;gap:8px}.prob-v2-ch9 .population-buttons button{min-width:68px;padding:10px 12px;border:1px solid var(--border);border-radius:10px;background:var(--bg);color:var(--text-secondary);cursor:pointer}.prob-v2-ch9 .population-buttons button.active{border-color:var(--condition);background:var(--condition-soft);color:var(--text)}.prob-v2-ch9 .replacement-board{display:grid;grid-template-columns:minmax(620px,1.2fr) minmax(330px,.8fr);gap:18px}.prob-v2-ch9 .shift-visual,.prob-v2-ch9 .shift-summary{padding:20px;border:1px solid var(--border);border-radius:17px;background:var(--bg-surface)}.prob-v2-ch9 .probability-bar{display:grid;grid-template-columns:150px 1fr 80px;gap:13px;align-items:center;margin-top:18px}.prob-v2-ch9 .probability-bar span{color:var(--text-secondary);font-size:11px}.prob-v2-ch9 .probability-track{height:38px;overflow:hidden;border:1px solid var(--border);border-radius:9px;background:var(--bg)}.prob-v2-ch9 .probability-fill{height:100%;background:repeating-linear-gradient(135deg,transparent 0 7px,color-mix(in srgb,var(--event-a) 24%,transparent) 7px 11px),var(--event-a-soft);border-right:3px solid var(--event-a);transition:width .2s ease}.prob-v2-ch9 .probability-bar strong{color:var(--text);font-family:JetBrains Mono,monospace;text-align:right}.prob-v2-ch9 .shift-summary{display:grid;align-content:center}.prob-v2-ch9 .shift-summary>strong{display:block;margin:7px 0;color:var(--text);font-size:33px}.prob-v2-ch9 .shift-summary.exact{border-color:var(--stable);background:var(--stable-soft)}.prob-v2-ch9 .shift-summary.approximate{border-color:var(--condition);background:var(--condition-soft)}.prob-v2-ch9 .shift-summary.changed{border-color:var(--changed);background:var(--changed-soft)}.prob-v2-ch9 .bag-scale{display:flex;gap:5px;align-items:center;margin-top:16px}.prob-v2-ch9 .bag-scale i{display:block;width:10px;height:10px;border-radius:50%;background:var(--event-a)}.prob-v2-ch9 .bag-scale i.blue{background:var(--condition)}.prob-v2-ch9 .bag-scale span{margin-left:8px;color:var(--text-muted);font-size:9px}.prob-v2-ch9 .joint-board{display:grid;grid-template-columns:minmax(610px,1.15fr) minmax(340px,.85fr);gap:18px}.prob-v2-ch9 .joint-grid-panel,.prob-v2-ch9 .joint-stats{padding:19px;border:1px solid var(--border);border-radius:17px;background:var(--bg-surface)}.prob-v2-ch9 .joint-grid{display:grid;grid-template-columns:repeat(10,1fr);gap:4px;margin-top:14px}.prob-v2-ch9 .joint-tile{display:grid;place-items:center;min-height:27px;border:1px solid var(--border);border-radius:6px;background:var(--bg);color:var(--text-muted);font-size:7px}.prob-v2-ch9 .joint-tile.ss{border-color:var(--stable);background:var(--stable-soft);color:var(--text)}.prob-v2-ch9 .joint-tile.sf,.prob-v2-ch9 .joint-tile.fs{border-color:var(--condition);background:repeating-linear-gradient(135deg,var(--condition-soft) 0 5px,transparent 5px 9px),var(--bg)}.prob-v2-ch9 .joint-tile.ff{border-color:var(--changed);background:var(--changed-soft);color:var(--text)}.prob-v2-ch9 .joint-legend{display:flex;gap:14px;margin-top:12px;color:var(--text-secondary);font-size:9px}.prob-v2-ch9 .joint-stats{display:grid;gap:9px}.prob-v2-ch9 .joint-stat{padding:14px;border:1px solid var(--border);border-radius:11px;background:var(--bg)}.prob-v2-ch9 .joint-stat span{display:block;color:var(--text-muted);font-size:8px}.prob-v2-ch9 .joint-stat strong{display:block;margin-top:5px;color:var(--text);font-size:23px}.prob-v2-ch9 .joint-stat.highlight{border-color:var(--stable);background:var(--stable-soft)}.prob-v2-ch9 .marginal-lock{display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:center;padding:17px;border:1px solid var(--accent-30);border-radius:15px;background:var(--accent-10)}.prob-v2-ch9 .marginal-lock div{text-align:center}.prob-v2-ch9 .marginal-lock span{display:block;color:var(--text-muted);font-size:8px}.prob-v2-ch9 .marginal-lock strong{display:block;margin-top:5px;color:var(--text);font-size:16px}.prob-v2-ch9 .marginal-lock i{color:var(--accent);font-style:normal}@media(prefers-reduced-motion:reduce){.prob-v2-ch9 .probability-fill{transition:none!important}}.prob-v2-ch10{--hypothesis: #788f69;--hypothesis-soft: color-mix(in srgb, var(--hypothesis) 18%, transparent);--alternative: #6f92ad;--alternative-soft: color-mix(in srgb, var(--alternative) 17%, transparent);--evidence: #b77d69;--evidence-soft: color-mix(in srgb, var(--evidence) 17%, transparent);--false-positive: #a85f5f;--false-positive-soft: color-mix(in srgb, var(--false-positive) 16%, transparent)}.prob-v2-ch10 .bayes-prediction{display:grid;grid-template-columns:minmax(520px,1fr) auto;gap:22px;align-items:center}.prob-v2-ch10 .frequency-board{display:grid;grid-template-columns:minmax(620px,1.2fr) minmax(330px,.8fr);gap:18px}.prob-v2-ch10 .frequency-panel,.prob-v2-ch10 .evidence-pool{padding:19px;border:1px solid var(--border);border-radius:17px;background:var(--bg-surface)}.prob-v2-ch10 .morning-grid{display:grid;grid-template-columns:repeat(10,1fr);gap:6px;margin-top:14px}.prob-v2-ch10 .morning-tile{display:grid;place-items:center;min-height:39px;border:1px solid var(--border);border-radius:7px;background:var(--bg);color:var(--text-muted);font-size:7px}.prob-v2-ch10 .morning-tile.rain{border-color:var(--hypothesis);background:var(--hypothesis-soft)}.prob-v2-ch10 .morning-tile.wet{box-shadow:inset 0 -4px 0 var(--evidence)}.prob-v2-ch10 .morning-tile.in-frame{outline:2px solid var(--text);outline-offset:-3px;color:var(--text)}.prob-v2-ch10 .morning-tile.outside-frame{opacity:.16}.prob-v2-ch10 .frequency-legend{display:flex;flex-wrap:wrap;gap:14px;margin-top:12px;color:var(--text-secondary);font-size:9px}.prob-v2-ch10 .frequency-legend i{display:inline-block;width:11px;height:11px;margin-right:5px;border:1px solid var(--hypothesis);border-radius:3px;background:var(--hypothesis-soft);vertical-align:-1px}.prob-v2-ch10 .frequency-legend i.wet{border-color:var(--evidence);background:var(--evidence-soft)}.prob-v2-ch10 .frequency-legend i.false-positive{border-color:var(--false-positive);background:var(--false-positive)}.prob-v2-ch10 .evidence-pool{display:grid;align-content:center;border-color:var(--evidence);background:var(--evidence-soft)}.prob-v2-ch10 .direction-fraction{display:grid;grid-template-columns:1fr auto 1fr;gap:9px;align-items:center;margin:13px 0}.prob-v2-ch10 .direction-fraction div{padding:14px 10px;border:1px solid var(--border);border-radius:10px;background:var(--bg);text-align:center}.prob-v2-ch10 .direction-fraction span{display:block;color:var(--text-muted);font-size:8px}.prob-v2-ch10 .direction-fraction strong{display:block;margin-top:5px;color:var(--text);font-size:20px}.prob-v2-ch10 .direction-fraction i{color:var(--evidence);font-style:normal}.prob-v2-ch10 .posterior-number{color:var(--text);font-size:34px;font-weight:800}.prob-v2-ch10 .bayes-map{display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:center;padding:17px;border:1px solid var(--accent-30);border-radius:15px;background:var(--accent-10)}.prob-v2-ch10 .bayes-map div{text-align:center}.prob-v2-ch10 .bayes-map span{display:block;color:var(--text-muted);font-size:8px}.prob-v2-ch10 .bayes-map strong{display:block;margin-top:5px;color:var(--text);font-size:16px}.prob-v2-ch10 .bayes-map i{color:var(--evidence);font-style:normal;font-weight:750}.prob-v2-ch10 .prevalence-control{display:grid;grid-template-columns:180px 1fr 80px;gap:13px;align-items:center;padding:15px 18px;border:1px solid var(--border);border-radius:14px;background:var(--bg-surface)}.prob-v2-ch10 .prevalence-control label{color:var(--text-secondary);font-size:11px;font-weight:700}.prob-v2-ch10 .prevalence-control input{width:100%;accent-color:var(--hypothesis)}.prob-v2-ch10 .prevalence-control strong{color:var(--text);font-family:JetBrains Mono,monospace;text-align:right}.prob-v2-ch10 .test-board{display:grid;grid-template-columns:minmax(650px,1.25fr) minmax(310px,.75fr);gap:18px}.prob-v2-ch10 .icon-array-panel,.prob-v2-ch10 .test-stats{padding:18px;border:1px solid var(--border);border-radius:17px;background:var(--bg-surface)}.prob-v2-ch10 .icon-array{display:grid;grid-template-columns:repeat(40,1fr);gap:2px;margin-top:13px}.prob-v2-ch10 .person-dot{aspect-ratio:1;min-height:7px;border:1px solid var(--border);border-radius:2px;background:var(--bg)}.prob-v2-ch10 .person-dot.true-positive{border-color:var(--hypothesis);background:var(--hypothesis)}.prob-v2-ch10 .person-dot.false-negative{border-color:var(--hypothesis);background:repeating-linear-gradient(135deg,var(--hypothesis-soft) 0 3px,transparent 3px 5px),var(--bg)}.prob-v2-ch10 .person-dot.false-positive{border-color:var(--false-positive);background:var(--false-positive)}.prob-v2-ch10 .person-dot.filtered-out{opacity:.08}.prob-v2-ch10 .test-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;align-content:start}.prob-v2-ch10 .test-stat{padding:13px;border:1px solid var(--border);border-radius:11px;background:var(--bg)}.prob-v2-ch10 .test-stat span{display:block;color:var(--text-muted);font-size:8px}.prob-v2-ch10 .test-stat strong{display:block;margin-top:4px;color:var(--text);font-size:22px}.prob-v2-ch10 .test-stat.highlight{border-color:var(--evidence);background:var(--evidence-soft)}.prob-v2-ch10 .positive-pool-bar{display:flex;height:82px;overflow:hidden;border:1px solid var(--border-strong);border-radius:13px;background:var(--bg)}.prob-v2-ch10 .positive-pool-bar div{display:grid;place-items:center;min-width:0;overflow:hidden;color:var(--bg);font-size:9px;font-weight:750;text-align:center;transition:width .2s ease}.prob-v2-ch10 .true-positive-mass{background:var(--hypothesis)}.prob-v2-ch10 .false-positive-mass{background:var(--false-positive)}.prob-v2-ch10 .updater-controls{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.prob-v2-ch10 .updater-control{display:grid;grid-template-columns:140px 1fr 62px;gap:10px;align-items:center;padding:14px;border:1px solid var(--border);border-radius:12px;background:var(--bg)}.prob-v2-ch10 .updater-control label{color:var(--text-secondary);font-size:10px;font-weight:700}.prob-v2-ch10 .updater-control input{width:100%;accent-color:var(--hypothesis)}.prob-v2-ch10 .updater-control strong{color:var(--text);font-family:JetBrains Mono,monospace;text-align:right}.prob-v2-ch10 .updater-board{display:grid;grid-template-columns:minmax(660px,1.25fr) minmax(300px,.75fr);gap:18px}.prob-v2-ch10 .weight-machine,.prob-v2-ch10 .posterior-panel{padding:20px;border:1px solid var(--border);border-radius:17px;background:var(--bg-surface)}.prob-v2-ch10 .weight-lane{display:grid;grid-template-columns:110px 1fr 55px 1fr;gap:10px;align-items:center;margin-top:15px}.prob-v2-ch10 .weight-lane>span{color:var(--text-secondary);font-size:10px;font-weight:700}.prob-v2-ch10 .weight-track{height:44px;overflow:hidden;border:1px solid var(--border);border-radius:9px;background:var(--bg)}.prob-v2-ch10 .weight-fill{display:grid;place-items:center;height:100%;min-width:2px;border-right:3px solid var(--hypothesis);background:var(--hypothesis-soft);color:var(--text);font-size:9px;transition:width .2s ease}.prob-v2-ch10 .weight-fill.alternative{border-right-color:var(--alternative);background:var(--alternative-soft)}.prob-v2-ch10 .likelihood-gate{color:var(--evidence);font-size:9px;font-weight:750;text-align:center}.prob-v2-ch10 .posterior-panel{display:grid;align-content:center;border-color:var(--hypothesis);background:var(--hypothesis-soft)}.prob-v2-ch10 .posterior-panel>strong{display:block;margin:7px 0;color:var(--text);font-size:40px}.prob-v2-ch10 .posterior-bar{display:flex;height:72px;overflow:hidden;margin:13px 0;border:1px solid var(--border-strong);border-radius:12px;background:var(--bg)}.prob-v2-ch10 .posterior-bar div{display:grid;place-items:center;min-width:0;overflow:hidden;color:var(--bg);font-size:9px;font-weight:750;transition:width .2s ease}.prob-v2-ch10 .posterior-h{background:var(--hypothesis)}.prob-v2-ch10 .posterior-alt{background:var(--alternative)}.prob-v2-ch10 .source-board{display:grid;grid-template-columns:minmax(650px,1.2fr) minmax(320px,.8fr);gap:18px}.prob-v2-ch10 .source-lanes,.prob-v2-ch10 .source-posterior{padding:19px;border:1px solid var(--border);border-radius:17px;background:var(--bg-surface)}.prob-v2-ch10 .source-lane{display:grid;grid-template-columns:95px 1fr 92px 86px;gap:10px;align-items:center;margin-top:13px;padding:12px;border:1px solid var(--border);border-radius:11px;background:var(--bg)}.prob-v2-ch10 .source-lane.focused{border-color:var(--evidence);box-shadow:inset 3px 0 0 var(--evidence)}.prob-v2-ch10 .source-lane button{border:0;background:transparent;color:var(--text);cursor:pointer;font-weight:750;text-align:left}.prob-v2-ch10 .source-prior-track{height:30px;overflow:hidden;border:1px solid var(--border);border-radius:7px;background:var(--bg-surface)}.prob-v2-ch10 .source-prior-fill{height:100%;border-right:3px solid var(--alternative);background:var(--alternative-soft)}.prob-v2-ch10 .source-lane span{color:var(--text-secondary);font-size:9px}.prob-v2-ch10 .source-lane strong{color:var(--text);font-family:JetBrains Mono,monospace;font-size:11px;text-align:right}.prob-v2-ch10 .evidence-tray{display:flex;height:86px;overflow:hidden;margin-top:18px;border:1px solid var(--border-strong);border-radius:13px;background:var(--bg)}.prob-v2-ch10 .evidence-segment{display:grid;place-items:center;min-width:0;overflow:hidden;border-right:2px solid var(--bg);background:var(--evidence);color:var(--bg);font-size:9px;font-weight:750;text-align:center;transition:width .2s ease}.prob-v2-ch10 .evidence-segment.mobile{background:var(--hypothesis)}.prob-v2-ch10 .evidence-segment.api{background:var(--alternative)}.prob-v2-ch10 .source-posterior{display:grid;align-content:center;border-color:var(--evidence);background:var(--evidence-soft)}.prob-v2-ch10 .source-posterior>strong{display:block;margin:7px 0;color:var(--text);font-size:38px}.prob-v2-ch10 .api-control{display:grid;grid-template-columns:140px 1fr 60px;gap:12px;align-items:center;padding:15px;border:1px solid var(--border);border-radius:13px;background:var(--bg)}.prob-v2-ch10 .api-control label{color:var(--text-secondary);font-size:10px;font-weight:700}.prob-v2-ch10 .api-control input{width:100%;accent-color:var(--alternative)}.prob-v2-ch10 .api-control strong{color:var(--text);font-family:JetBrains Mono,monospace;text-align:right}@media(prefers-reduced-motion:reduce){.prob-v2-ch10 .positive-pool-bar div,.prob-v2-ch10 .weight-fill,.prob-v2-ch10 .posterior-bar div,.prob-v2-ch10 .evidence-segment{transition:none!important}}.prob-v2-ch11{--rv-input: #6f8da5;--rv-input-soft: color-mix(in srgb, var(--rv-input) 16%, transparent);--rv-machine: #ad775f;--rv-machine-soft: color-mix(in srgb, var(--rv-machine) 16%, transparent);--rv-output: #788f69;--rv-output-soft: color-mix(in srgb, var(--rv-output) 17%, transparent);--rv-continuous: #7e6c9e}.prob-v2-ch11 .rv-prediction{display:grid;grid-template-columns:minmax(560px,1fr) auto;gap:22px;align-items:center}.prob-v2-ch11 .mapping-board{display:grid;grid-template-columns:minmax(500px,1.1fr) 230px minmax(330px,.75fr);gap:18px;align-items:stretch}.prob-v2-ch11 .rv-input-world,.prob-v2-ch11 .value-world,.prob-v2-ch11 .measurement-machine,.prob-v2-ch11 .rv-dice-world,.prob-v2-ch11 .measure-readout,.prob-v2-ch11 .preimage-world,.prob-v2-ch11 .bucket-world,.prob-v2-ch11 .spinner-panel,.prob-v2-ch11 .scale-output{padding:19px;border:1px solid var(--border);border-radius:17px;background:var(--bg-surface)}.prob-v2-ch11 .coin-path-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin-top:15px}.prob-v2-ch11 .coin-path-grid button{display:flex;align-items:center;justify-content:space-between;min-height:54px;padding:9px 11px;border:1px solid var(--border);border-radius:10px;background:var(--bg);color:var(--text);cursor:pointer;transition:border-color .16s ease,background .16s ease,transform .16s ease}.prob-v2-ch11 .coin-path-grid button:hover,.prob-v2-ch11 .coin-path-grid button:focus-visible{border-color:var(--rv-input)}.prob-v2-ch11 .coin-path-grid button.active{border-color:var(--rv-input);background:var(--rv-input-soft);box-shadow:inset 3px 0 0 var(--rv-input)}.prob-v2-ch11 .coin-path-grid small{color:var(--text-muted);font-size:8px}.prob-v2-ch11 .coin-sequence{display:flex;gap:5px}.prob-v2-ch11 .coin-sequence i{display:grid;place-items:center;width:27px;height:27px;border:1px solid var(--rv-output);border-radius:50%;background:var(--rv-output-soft);color:var(--text);font-size:10px;font-style:normal;font-weight:800}.prob-v2-ch11 .coin-sequence i.tail{border-color:var(--border-strong);background:var(--bg-raised);color:var(--text-secondary)}.prob-v2-ch11 .measurement-machine{display:grid;align-content:center;justify-items:center;border-color:var(--rv-machine);background:linear-gradient(var(--rv-machine-soft),var(--rv-machine-soft)),var(--bg-surface);text-align:center}.prob-v2-ch11 .measurement-machine>span{color:var(--rv-machine);font-size:8px;font-weight:800;letter-spacing:.14em}.prob-v2-ch11 .measurement-machine>strong{margin-top:6px;font-size:17px}.prob-v2-ch11 .machine-input,.prob-v2-ch11 .machine-output{display:grid;place-items:center;min-width:96px;min-height:48px;margin-top:20px;border:1px solid var(--rv-input);border-radius:10px;background:var(--bg);font-family:JetBrains Mono,monospace;font-size:18px;font-weight:800}.prob-v2-ch11 .measurement-machine>i{margin-top:6px;color:var(--rv-machine);font-size:24px;font-style:normal}.prob-v2-ch11 .machine-output{margin-top:6px;border-color:var(--rv-output);background:var(--rv-output-soft);color:var(--rv-output);font-size:27px}.prob-v2-ch11 .measurement-machine>small{margin-top:10px;color:var(--text-muted);font-size:8px}.prob-v2-ch11 .value-slots{display:grid;gap:10px;margin-top:15px}.prob-v2-ch11 .value-slots>div{display:grid;grid-template-columns:50px 1fr;gap:10px;align-items:center;min-height:56px;padding:8px 12px;border:1px solid var(--border);border-radius:10px;background:var(--bg);transition:border-color .16s ease,background .16s ease}.prob-v2-ch11 .value-slots>div.active{border-color:var(--rv-output);background:var(--rv-output-soft)}.prob-v2-ch11 .value-slots strong{font-size:24px;text-align:center}.prob-v2-ch11 .value-slots span{color:var(--text-secondary);font-size:9px}.prob-v2-ch11 .rv-core-map{display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:center;min-width:430px;padding:16px;border:1px solid var(--accent-30);border-radius:14px;background:var(--accent-10)}.prob-v2-ch11 .rv-core-map>div{text-align:center}.prob-v2-ch11 .rv-core-map span{display:block;color:var(--text-muted);font-size:8px}.prob-v2-ch11 .rv-core-map strong{display:block;margin-bottom:4px;font-size:16px}.prob-v2-ch11 .rv-core-map>i{color:var(--rv-machine);font-size:9px;font-style:normal;font-weight:750}.prob-v2-ch11 .rv-core-map.compact{min-width:370px}.prob-v2-ch11 .transfer-check{display:grid;grid-template-columns:1fr auto;gap:8px 20px;align-items:center;padding:17px 20px;border:1px dashed var(--border-strong);border-radius:14px}.prob-v2-ch11 .transfer-check .eyebrow,.prob-v2-ch11 .transfer-check h3{grid-column:1}.prob-v2-ch11 .transfer-check button{grid-column:2;grid-row:1/3;padding:9px 13px;border:1px solid var(--border-strong);border-radius:9px;background:var(--bg-raised);color:var(--text);cursor:pointer}.prob-v2-ch11 .transfer-check .feedback{grid-column:1/-1}.prob-v2-ch11 .dice-measure-board{display:grid;grid-template-columns:minmax(690px,1.25fr) minmax(330px,.75fr);gap:18px}.prob-v2-ch11 .axis-caption{display:flex;justify-content:space-between;margin-bottom:8px;color:var(--text-muted);font-size:8px}.prob-v2-ch11 .dice-outcome-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:6px}.prob-v2-ch11 .dice-outcome-grid button{display:grid;place-items:center;min-height:65px;padding:6px;border:1px solid hsl(var(--value-tone),25%,48%,.48);border-radius:9px;background:hsl(var(--value-tone),30%,46%,.12);color:var(--text);cursor:pointer}.prob-v2-ch11 .dice-outcome-grid button:hover,.prob-v2-ch11 .dice-outcome-grid button:focus-visible{border-color:hsl(var(--value-tone),45%,54%,.95)}.prob-v2-ch11 .dice-outcome-grid button.active{outline:3px solid var(--text);outline-offset:-4px}.prob-v2-ch11 .dice-outcome-grid button.binary-on{background:repeating-linear-gradient(135deg,hsl(var(--value-tone),50%,54%,.2) 0 5px,transparent 5px 9px),var(--bg)}.prob-v2-ch11 .dice-outcome-grid small{color:var(--text-muted);font-size:8px}.prob-v2-ch11 .dice-outcome-grid strong{font-size:20px}.prob-v2-ch11 .measure-readout{display:grid;align-content:center;justify-items:center;text-align:center}.prob-v2-ch11 .selected-dice{display:flex;gap:12px;margin:14px 0 8px}.prob-v2-ch11 .selected-dice i{display:grid;place-items:center;width:58px;height:58px;border:1px solid var(--rv-input);border-radius:13px;background:var(--rv-input-soft);font-size:24px;font-style:normal;font-weight:800}.prob-v2-ch11 .measure-readout>p{color:var(--text-secondary);font-size:9px}.prob-v2-ch11 .rule-output{width:100%;margin:17px 0 10px;padding:15px;border:1px solid var(--rv-output);border-radius:12px;background:var(--rv-output-soft)}.prob-v2-ch11 .rule-output span{display:block;color:var(--text-secondary);font-size:9px}.prob-v2-ch11 .rule-output strong{display:block;margin-top:7px;font-size:23px}.prob-v2-ch11 .value-selector{display:flex;gap:7px}.prob-v2-ch11 .value-selector button{min-width:70px;padding:9px 12px;border:1px solid var(--border);border-radius:9px;background:var(--bg);color:var(--text-secondary);cursor:pointer}.prob-v2-ch11 .value-selector button.active{border-color:var(--rv-output);background:var(--rv-output-soft);color:var(--text)}.prob-v2-ch11 .preimage-board{display:grid;grid-template-columns:minmax(520px,1fr) 160px minmax(350px,.75fr);gap:16px;align-items:stretch}.prob-v2-ch11 .preimage-paths{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin-top:14px}.prob-v2-ch11 .preimage-paths>div{display:flex;align-items:center;justify-content:space-between;min-height:48px;padding:8px 10px;border:1px solid var(--border);border-radius:9px;background:var(--bg);opacity:.28;transition:opacity .16s ease,border-color .16s ease,background .16s ease}.prob-v2-ch11 .preimage-paths>div.selected{border-color:var(--rv-input);background:var(--rv-input-soft);opacity:1}.prob-v2-ch11 .preimage-paths .coin-sequence i{width:23px;height:23px;font-size:8px}.prob-v2-ch11 .preimage-paths small{color:var(--text-muted);font-size:8px}.prob-v2-ch11 .event-brace{display:flex;justify-content:space-between;gap:14px;margin-top:12px;padding:10px 12px;border-left:4px solid var(--rv-input);background:var(--rv-input-soft)}.prob-v2-ch11 .event-brace span{color:var(--rv-input);font-size:8px;font-weight:800}.prob-v2-ch11 .event-brace strong{font-family:JetBrains Mono,monospace;font-size:9px}.prob-v2-ch11 .flow-funnel{display:grid;align-content:center;justify-items:center;color:var(--text-muted);text-align:center}.prob-v2-ch11 .flow-funnel i{margin:10px 0;color:var(--rv-machine);font-size:35px;font-style:normal}.prob-v2-ch11 .flow-funnel span{font-size:8px}.prob-v2-ch11 .bucket-stack{display:grid;gap:8px;margin-top:14px}.prob-v2-ch11 .bucket-stack button{position:relative;display:grid;grid-template-columns:35px 1fr 40px;gap:8px;align-items:center;min-height:49px;overflow:hidden;padding:7px 10px;border:1px solid var(--border);border-radius:9px;background:var(--bg);color:var(--text);cursor:pointer}.prob-v2-ch11 .bucket-stack button.active{border-color:var(--rv-output);box-shadow:inset 3px 0 0 var(--rv-output)}.prob-v2-ch11 .bucket-stack strong,.prob-v2-ch11 .bucket-stack small{position:relative;z-index:1}.prob-v2-ch11 .bucket-stack strong{font-size:18px}.prob-v2-ch11 .bucket-stack small{color:var(--text-secondary);text-align:right}.prob-v2-ch11 .bucket-fill{position:relative;z-index:1;display:block;height:12px;border-radius:999px;background:var(--rv-output)}.prob-v2-ch11 .probability-readout{display:flex;justify-content:space-between;gap:15px;margin-top:15px;padding:14px;border:1px solid var(--rv-output);border-radius:10px;background:var(--rv-output-soft)}.prob-v2-ch11 .probability-readout span{color:var(--text-secondary);font-size:10px}.prob-v2-ch11 .probability-readout strong{font-size:15px}.prob-v2-ch11 .spinner-controls{display:grid;grid-template-columns:210px 1fr 75px auto;gap:14px;align-items:center;padding:14px 18px;border:1px solid var(--border);border-radius:14px;background:var(--bg-surface)}.prob-v2-ch11 .spinner-controls label{color:var(--text-secondary);font-size:10px;font-weight:750}.prob-v2-ch11 .spinner-controls input{width:100%;accent-color:var(--rv-continuous)}.prob-v2-ch11 .spinner-controls>strong{font-family:JetBrains Mono,monospace;text-align:right}.prob-v2-ch11 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.selected-point{margin-top:12px;font-size:31px}.prob-v2-ch13 .deviation-product{display:grid;grid-template-columns:1fr auto 1fr auto 1.15fr;gap:7px;align-items:center;margin-top:16px}.prob-v2-ch13 .deviation-product>div{padding:12px 6px;border:1px solid var(--border);border-radius:8px;background:var(--bg)}.prob-v2-ch13 .deviation-product>div.positive{border-color:var(--moment-mass);background:var(--moment-mass-soft)}.prob-v2-ch13 .deviation-product>div.negative{border-color:var(--moment-negative);background:var(--moment-negative-soft)}.prob-v2-ch13 .deviation-product span,.prob-v2-ch13 .deviation-product strong{display:block}.prob-v2-ch13 .deviation-product span{color:var(--text-muted);font-size:7px}.prob-v2-ch13 .deviation-product strong{margin-top:4px;font-size:16px}.prob-v2-ch13 .deviation-product>i{color:var(--text-muted);font-style:normal}.prob-v2-ch13 .covariance-total{margin-top:17px;padding:14px;border:1px solid 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small{display:grid;place-items:center;width:22px;height:22px;border-radius:50%;background:var(--action-soft);color:var(--action);font-size:9px;font-weight:800}app-algebra-v2-lesson .action-chip strong{font-size:11px;line-height:1.4}app-algebra-v2-lesson .formula-readout{width:fit-content;margin:8px auto 0;padding:9px 15px;border:1px solid var(--accent-30);border-radius:999px;background:var(--accent-10);color:var(--text);font-family:JetBrains Mono,monospace;font-size:13px}app-algebra-v2-lesson .timeline-controls{display:grid;grid-template-columns:auto minmax(220px,1fr) auto;max-width:760px;margin:15px auto 0}app-algebra-v2-lesson .timeline-controls label{display:grid;gap:5px;color:var(--text-muted);font-size:10px;font-weight:750;text-align:center}app-algebra-v2-lesson .timeline-controls input{width:100%;accent-color:var(--action)}app-algebra-v2-lesson .mapping-board{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;max-width:760px;margin:20px auto}app-algebra-v2-lesson .mapping-row{display:grid;grid-template-columns:1fr auto 1fr;gap:9px;align-items:center;min-height:74px;padding:12px;border:1px solid var(--border);border-radius:13px;background:var(--bg);color:var(--text-secondary);text-align:center}app-algebra-v2-lesson .mapping-row.same-fiber{border-color:var(--state);background:var(--state-soft)}app-algebra-v2-lesson .mapping-row.focused{outline:3px solid var(--action-soft);border-color:var(--action)}app-algebra-v2-lesson .interaction-readout{width:fit-content;margin:12px auto 0;padding:9px 14px;border-radius:999px;background:var(--state-soft);color:var(--text-secondary);font-size:11px}app-algebra-v2-lesson .mapping-row.accent{border-color:color-mix(in srgb,var(--action) 55%,var(--border));background:var(--action-soft)}app-algebra-v2-lesson .mapping-row i{color:var(--action);font-style:normal}app-algebra-v2-lesson .mapping-row strong{color:var(--text)}app-algebra-v2-lesson .mini-checks{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;max-width:820px;margin:15px auto 0}app-algebra-v2-lesson .mini-checks>div{display:grid;grid-template-columns:auto 1fr;gap:10px;align-items:start;padding:11px;border:1px solid var(--border);border-radius:11px;background:var(--bg)}app-algebra-v2-lesson .mini-checks>div.pass{border-color:color-mix(in srgb,var(--success) 45%,var(--border))}app-algebra-v2-lesson .mini-checks>div.fail{border-color:color-mix(in srgb,var(--failure) 45%,var(--border))}app-algebra-v2-lesson .mini-checks>div>span{color:var(--success);font-weight:800}app-algebra-v2-lesson .mini-checks>div.fail>span{color:var(--failure)}app-algebra-v2-lesson .mini-checks p{margin:0;color:var(--text-secondary);font-size:11px;line-height:1.55}app-algebra-v2-lesson .mini-checks strong{display:block;color:var(--text)}app-algebra-v2-lesson .cayley-wrap{display:grid;grid-template-columns:minmax(420px,1fr) minmax(230px,.65fr);gap:24px;align-items:center;max-width:820px;margin:0 auto}app-algebra-v2-lesson .cayley-table{width:100%;overflow:hidden;border-collapse:separate;border-spacing:5px;color:var(--text-secondary);text-align:center}app-algebra-v2-lesson .cayley-table th,app-algebra-v2-lesson .cayley-table td{height:54px;border:1px solid var(--border);border-radius:9px;background:var(--bg);font-family:JetBrains Mono,monospace;font-size:13px}app-algebra-v2-lesson .cayley-table td{padding:0;border:0;background:transparent}app-algebra-v2-lesson .cayley-table td button{width:100%;height:54px;padding:0;border-color:var(--border);font-family:JetBrains Mono,monospace;font-size:13px}app-algebra-v2-lesson .cayley-table th{color:var(--text);background:var(--bg-elevated)}app-algebra-v2-lesson .cayley-table td button.highlight{border:2px solid var(--action);background:var(--action-soft);color:var(--action);font-size:18px;font-weight:800}app-algebra-v2-lesson .cayley-table td button.selected{outline:3px solid var(--accent-30);outline-offset:1px;border-color:var(--accent);background:var(--accent-18);color:var(--text)}app-algebra-v2-lesson .table-readout{padding:18px;border:1px solid var(--accent-30);border-radius:14px;background:var(--accent-10)}app-algebra-v2-lesson .table-readout span{color:var(--text-muted);font-size:9px;font-weight:800;letter-spacing:.08em}app-algebra-v2-lesson .table-readout strong{display:block;margin:6px 0 8px;color:var(--text);font-family:JetBrains Mono,monospace;font-size:20px}app-algebra-v2-lesson .table-readout p{margin:0;color:var(--text-secondary);font-size:11px;line-height:1.6}app-algebra-v2-lesson .diagnostic-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;max-width:860px;margin:12px auto}app-algebra-v2-lesson .diagnostic-item{display:grid;grid-template-columns:auto 1fr;gap:13px;align-items:start;min-height:94px;padding:15px;border:1px solid var(--border);border-radius:14px;background:var(--bg)}app-algebra-v2-lesson .diagnostic-item.pass{border-color:color-mix(in srgb,var(--success) 45%,var(--border))}app-algebra-v2-lesson .diagnostic-item.fail{border-color:color-mix(in srgb,var(--failure) 45%,var(--border))}app-algebra-v2-lesson .diagnostic-item.focused{outline:3px solid var(--accent-30);outline-offset:2px;transform:translateY(-2px)}app-algebra-v2-lesson .status-mark{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--success-soft);color:var(--success);font-weight:900}app-algebra-v2-lesson .fail .status-mark{background:var(--failure-soft);color:var(--failure)}app-algebra-v2-lesson .diagnostic-item strong{color:var(--text);font-size:13px}app-algebra-v2-lesson .diagnostic-item p{margin:5px 0 0;color:var(--text-secondary);font-size:11px;line-height:1.55}app-algebra-v2-lesson .closure-machine{display:grid;grid-template-columns:minmax(260px,1fr) minmax(150px,.6fr) minmax(190px,.75fr);gap:16px;align-items:stretch;max-width:870px;margin:14px auto}app-algebra-v2-lesson .set-boundary,app-algebra-v2-lesson .machine-core,app-algebra-v2-lesson .machine-output{display:grid;gap:8px;place-content:center;min-height:170px;padding:17px;border:1px solid var(--border);border-radius:16px;background:var(--bg);text-align:center}app-algebra-v2-lesson .set-boundary{border:2px dashed var(--state);background:var(--state-soft)}app-algebra-v2-lesson .set-boundary>span,app-algebra-v2-lesson .machine-core>span,app-algebra-v2-lesson .machine-output>span{color:var(--text-muted);font-size:9px;font-weight:800;letter-spacing:.08em}app-algebra-v2-lesson .set-boundary strong,app-algebra-v2-lesson .machine-core strong,app-algebra-v2-lesson .machine-output strong{color:var(--text);font-size:15px;line-height:1.4}app-algebra-v2-lesson .input-pair{padding:8px;border:1px solid var(--border);border-radius:9px;background:var(--bg-surface);color:var(--state);font-family:JetBrains Mono,monospace;font-weight:800}app-algebra-v2-lesson .machine-core{border-color:color-mix(in srgb,var(--action) 55%,var(--border));background:var(--action-soft)}app-algebra-v2-lesson .machine-core i{color:var(--action);font-size:24px;font-style:normal}app-algebra-v2-lesson .machine-output.inside{border-color:var(--success);background:var(--success-soft)}app-algebra-v2-lesson .machine-output.outside{border:2px solid var(--failure);background:var(--failure-soft)}app-algebra-v2-lesson .machine-output strong{font-family:JetBrains Mono,monospace;font-size:28px}app-algebra-v2-lesson .machine-output small{color:var(--text-secondary)}app-algebra-v2-lesson .symbol-translator{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;max-width:820px;margin:30px auto}app-algebra-v2-lesson .symbol-translator>button{display:grid;grid-template-columns:1fr auto 70px;gap:14px;align-items:center;min-height:88px;padding:14px 17px;border:1px solid var(--border);border-radius:14px;background:var(--bg);text-align:left}app-algebra-v2-lesson .symbol-translator>button.focused{border-color:var(--action);background:var(--action-soft)}app-algebra-v2-lesson .cube-lab{display:grid;grid-template-columns:minmax(360px,1.15fr) minmax(250px,.85fr);gap:36px;align-items:center;max-width:880px;min-height:280px;margin:0 auto}app-algebra-v2-lesson .cube-scene{display:grid;min-height:260px;place-items:center;perspective:760px}app-algebra-v2-lesson .cube{position:relative;width:150px;height:150px;transform-style:preserve-3d;transition:transform .65s cubic-bezier(.2,.75,.25,1)}app-algebra-v2-lesson .cube-face{position:absolute;display:grid;width:150px;height:150px;place-items:center;border:2px solid color-mix(in srgb,var(--state) 70%,var(--border));background:color-mix(in srgb,var(--state) 19%,var(--bg));color:var(--text-muted);font-family:JetBrains Mono,monospace;font-size:9px;font-weight:800;letter-spacing:.08em;backface-visibility:visible}app-algebra-v2-lesson .cube-face.front{transform:translateZ(75px)}app-algebra-v2-lesson .cube-face.back{transform:rotateY(180deg) translateZ(75px)}app-algebra-v2-lesson .cube-face.right{transform:rotateY(90deg) translateZ(75px)}app-algebra-v2-lesson .cube-face.left{transform:rotateY(-90deg) translateZ(75px)}app-algebra-v2-lesson .cube-face.top{transform:rotateX(90deg) translateZ(75px)}app-algebra-v2-lesson .cube-face.bottom{transform:rotateX(-90deg) translateZ(75px)}app-algebra-v2-lesson .cube-vertex{position:absolute;top:-12px;right:-12px;display:grid;width:30px;height:30px;place-items:center;transform:translateZ(78px);border:3px solid var(--bg);border-radius:50%;background:var(--action);color:#fff;font-weight:900}app-algebra-v2-lesson .cube-console{display:grid;gap:12px;padding:22px;border-left:3px solid var(--action);background:var(--action-soft)}app-algebra-v2-lesson .cube-console>span,app-algebra-v2-lesson .cube-counter span{color:var(--text-muted);font-size:9px;font-weight:850;letter-spacing:.1em}app-algebra-v2-lesson .cube-console>strong{color:var(--text);font-size:19px}app-algebra-v2-lesson .cube-console p{margin:0;color:var(--text-secondary);font-size:12px;line-height:1.65}app-algebra-v2-lesson .cube-counter{display:flex;align-items:baseline;justify-content:space-between;padding:10px 0;border-block:1px solid var(--border)}app-algebra-v2-lesson .cube-counter b{color:var(--action);font-family:JetBrains Mono,monospace;font-size:22px}app-algebra-v2-lesson .cube-checks{grid-template-columns:repeat(3,minmax(0,1fr))}app-algebra-v2-lesson .symbol-translator span{color:var(--text-secondary);font-size:13px}app-algebra-v2-lesson .symbol-translator i{color:var(--action);font-style:normal}app-algebra-v2-lesson .symbol-translator strong{color:var(--action);font-family:JetBrains Mono,monospace;font-size:22px;text-align:center}app-algebra-v2-lesson .insight-card{display:grid;grid-template-columns:minmax(190px,.65fr) minmax(360px,1.35fr);gap:24px;align-items:center;padding:24px;border:1px solid var(--accent-30);border-radius:19px;background:linear-gradient(135deg,var(--accent-10),transparent)}app-algebra-v2-lesson .insight-icon{display:flex;align-items:center;justify-content:center;gap:9px}app-algebra-v2-lesson .insight-icon span{display:grid;place-items:center;min-width:70px;min-height:50px;padding:8px;border:1px solid var(--border-strong);border-radius:12px;background:var(--bg);color:var(--text);font-family:JetBrains Mono,monospace;font-size:11px}app-algebra-v2-lesson .insight-icon span:last-child{border-color:color-mix(in srgb,var(--action) 55%,var(--border));background:var(--action-soft);color:var(--action)}app-algebra-v2-lesson .insight-icon i{color:var(--accent);font-style:normal}app-algebra-v2-lesson .insight-card p{margin:5px 0 0;color:var(--text);font-size:18px;font-weight:680;line-height:1.6}app-algebra-v2-lesson .transfer-card{background:radial-gradient(circle at 0 100%,var(--state-soft),transparent 35%),var(--bg-surface)}app-algebra-v2-lesson .formal-zone{display:grid;gap:9px;margin-top:4px;padding-top:25px;border-top:1px solid var(--border)}app-algebra-v2-lesson .formal-zone-heading{display:grid;grid-template-columns:1fr minmax(250px,.8fr);gap:24px;align-items:end;margin-bottom:7px}app-algebra-v2-lesson .formal-zone-heading span{display:block;margin-bottom:4px;color:var(--text-muted)}app-algebra-v2-lesson .formal-zone-heading h3{margin:0;font-size:18px}app-algebra-v2-lesson .formal-zone-heading p{margin:0 0 2px;color:var(--text-muted);font-size:12px;line-height:1.55}app-algebra-v2-lesson .formal-panel{overflow:clip;border:1px solid var(--border);border-radius:13px;background:var(--bg-surface)}app-algebra-v2-lesson .formal-panel[open]{border-color:var(--border-strong)}app-algebra-v2-lesson .formal-panel summary{display:grid;grid-template-columns:34px 1fr;gap:11px;align-items:center;padding:13px 15px;cursor:pointer;list-style:none}app-algebra-v2-lesson .formal-panel summary::-webkit-details-marker{display:none}app-algebra-v2-lesson .formal-panel summary>span{display:grid;place-items:center;width:30px;height:30px;border-radius:9px;background:var(--bg-elevated);color:var(--text-muted);font-family:JetBrains Mono,monospace;font-size:9px;font-weight:800}app-algebra-v2-lesson .formal-panel summary strong,app-algebra-v2-lesson .formal-panel summary small{display:block}app-algebra-v2-lesson .formal-panel summary strong{color:var(--text);font-size:13px}app-algebra-v2-lesson .formal-panel summary small{margin-top:2px;color:var(--text-muted);font-size:11px}app-algebra-v2-lesson .formal-content{padding:3px 20px 18px 60px;color:var(--text-secondary);font-size:13px;line-height:1.75}app-algebra-v2-lesson .formal-content p{margin-bottom:10px}app-algebra-v2-lesson .math-line{overflow-x:auto;padding:13px;border-radius:10px;background:var(--bg);color:var(--text);text-align:center}app-algebra-v2-lesson .boundary-content{border-left:3px solid var(--warning);margin:0 20px 18px 60px;padding:12px 15px;border-radius:0 10px 10px 0;background:var(--warning-soft)}app-algebra-v2-lesson .boundary-content p{margin:0}app-algebra-v2-lesson .proof-layout{display:grid;grid-template-columns:minmax(260px,.8fr) minmax(420px,1.2fr);gap:18px;padding:5px 18px 20px}app-algebra-v2-lesson .proof-anchor{align-self:start;padding:17px;border:1px solid var(--accent-30);border-radius:13px;background:var(--accent-10)}app-algebra-v2-lesson .proof-anchor>span{color:var(--accent);font-size:9px;font-weight:800;letter-spacing:.1em}app-algebra-v2-lesson .proof-anchor strong{display:block;margin:7px 0 10px;color:var(--text);font-size:14px;line-height:1.55}app-algebra-v2-lesson .proof-anchor p{margin:0;color:var(--text-secondary);font-size:12px;line-height:1.65}app-algebra-v2-lesson .proof-steps{display:grid;gap:8px}app-algebra-v2-lesson .proof-steps>div:not(.proof-controls){display:grid;grid-template-columns:26px 1fr;gap:10px;align-items:start;min-height:48px;padding:10px;border:1px dashed var(--border);border-radius:10px;opacity:.65}app-algebra-v2-lesson .proof-steps>div.visible{border-style:solid;border-color:var(--border-strong);background:var(--bg);opacity:1}app-algebra-v2-lesson .proof-steps>div>span{display:grid;place-items:center;width:24px;height:24px;border-radius:50%;background:var(--bg-elevated);color:var(--text-muted);font-size:9px;font-weight:800}app-algebra-v2-lesson .proof-steps>div.visible>span{background:var(--action-soft);color:var(--action)}app-algebra-v2-lesson .proof-steps p{margin:2px 0 0;color:var(--text-secondary);font-size:12px;line-height:1.55}app-algebra-v2-lesson .proof-controls{display:flex;gap:8px;margin-top:3px}app-algebra-v2-lesson .proof-controls button{min-height:35px;padding:6px 11px;font-size:11px}app-algebra-v2-lesson .proof-controls button.quiet{border-color:transparent;background:transparent;color:var(--text-muted)}@media(max-width:900px){app-algebra-v2-lesson .transform-stage,app-algebra-v2-lesson .timeline-stage,app-algebra-v2-lesson .closure-machine,app-algebra-v2-lesson .cayley-wrap,app-algebra-v2-lesson .cube-lab,app-algebra-v2-lesson .proof-layout{grid-template-columns:1fr}app-algebra-v2-lesson .network-stage{grid-template-columns:1fr}app-algebra-v2-lesson .transform-arrow{grid-template-columns:auto auto}app-algebra-v2-lesson .timeline-stage{gap:10px}app-algebra-v2-lesson .timeline-controls{grid-template-columns:1fr}app-algebra-v2-lesson .action-track{flex-wrap:wrap}}@media(prefers-reduced-motion:reduce){app-algebra-v2-lesson button,app-algebra-v2-lesson .shape-panel g,app-algebra-v2-lesson .action-chip,app-algebra-v2-lesson .cube{transition:none!important}}.alg-ch1-lesson{display:grid;gap:30px;--action: #b76f52;--action-soft: color-mix(in srgb, var(--action) 15%, transparent);--state: 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