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@media(max-width:1150px){.app{padding-inline:24px}.workspace{grid-template-columns:180px minmax(280px,1fr) minmax(290px,.95fr);gap:14px}.calculation-panel{padding:16px}.source-rail{padding-right:12px}.vector-button{font-size:9px}.lesson-heading{grid-template-columns:1fr 260px;gap:20px}.stage-nav button span{display:none}.provenance-chain{gap:16px}.trace-node strong{font-size:14px}.trace-node:not(:last-child):after{right:-14px}.dataset-card{grid-template-columns:55px 12px 1fr;padding:12px 8px}.dataset-card .illustration{width:55px;height:55px}.dataset-card p{font-size:11px}.flow-table{border-spacing:2px 5px}.flow-table td{font-size:11px}.source-pair-top{grid-template-columns:36px 1fr;gap:7px}.source-card .illustration{width:36px;height:36px}.pair-caption{font-size:10px}.source-card{padding-right:0}}
@media(max-width:900px){.workspace{grid-template-columns:180px 1fr}.calculation-panel{grid-column:1/-1}.lesson-heading{grid-template-columns:1fr}.lesson-side{display:none}.dataset-grid{grid-template-columns:repeat(3,1fr)}.flow-table td{font-size:15px}.calculation-panel{max-width:none}.top-actions .quiet{font-size:11px;padding:7px}.provenance-chain{grid-template-columns:repeat(5,1fr);gap:14px}.trace-node{padding:7px}.trace-node strong{font-size:12px}.vector-button{font-size:11px}.comparison{gap:14px}.compare-panel{padding:15px}.compare-panel .compare-visuals{grid-template-columns:1fr}.stage-nav{overflow-x:auto}.stage-nav button{min-width:65px}.stage-nav button:not(:last-child):after{display:none}.source-card .illustration{width:40px;height:40px}.source-pair-top{grid-template-columns:40px 1fr}}
@media(max-width:600px){.app{padding-inline:16px}.topbar{height:auto;min-height:87px;flex-wrap:wrap;padding-block:15px;gap:10px}.brand{font-size:10px}.brand-mark{height:25px;width:25px;font-size:21px}.top-actions{width:100%;justify-content:space-between;gap:3px}.top-actions .quiet{padding:5px 0}.stage-nav button{font-size:9px;min-width:68px}.lesson-heading{padding:23px 0 18px}.toy-badge{display:none}h1{letter-spacing:-1px;font-size:33px}#stage-description{font-size:13px}.dataset-grid{grid-template-columns:1fr 1fr;gap:10px}.dataset-card{grid-template-columns:44px 7px 1fr;min-height:96px;padding:11px 7px}.dataset-card .illustration{width:43px;height:43px}.dataset-card p{font-size:10px;margin-left:5px}.dataset-bottom{align-items:flex-start;font-size:11px;flex-direction:column}.workspace{grid-template-columns:1fr;gap:18px}.source-rail{border:0;padding:0}.source-rail>.section-line{border-bottom:1px solid var(--line);padding-bottom:8px}#source-pairs{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.source-pair-top{grid-template-columns:1fr;gap:5px}.pair-caption{font-size:10px}.source-card{padding:9px 2px;min-width:0}.pair-name{font-size:11px}.vector-button{font-size:9px;line-height:1.6;padding:3px 1px}.unit-badge{font-size:8px;padding-left:0}#geometry-wrap{display:none}.matrix-panel{padding:0}.matrix-host{max-width:430px}.calculation-panel{grid-column:auto;padding:20px 16px}.provenance{padding:12px;margin-top:18px}.provenance .section-line{font-size:9px;gap:5px;flex-wrap:wrap}.provenance-chain{grid-template-columns:1fr 1fr;gap:12px}.trace-node{padding:9px}.trace-node strong{font-size:16px}.trace-node:not(:last-child):after{display:none}.trace-node svg{display:none}.trace-node:last-child{grid-column:1/-1}.provenance-details{grid-template-columns:1fr}.comparison{grid-template-columns:1fr}.compare-panel .compare-visuals{grid-template-columns:1fr 1fr}.step-footer{gap:10px}.step-footer .primary{min-width:80px;gap:14px}.step-footer .quiet{font-size:11px;padding:5px}.keyboard-hint{display:none}.credit{font-size:8px;line-height:1.6}.flow-table td{font-size:12px}.vector-matrices button{font-size:10px}.source-note{margin-top:8px}.train-actions button{font-size:11px}.step-footer{margin-top:20px}.matrix-equation{font-size:22px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* Keep the loss walkthrough together on a classroom display. */
.loss-terms{grid-template-columns:repeat(3,minmax(0,1fr));gap:6px;margin-top:11px}
.loss-term{display:block;text-align:center;padding:6px 3px;font-size:10px}
.loss-term strong{display:block;margin-top:3px;font:13px var(--mono)}
.matrix-sweep{display:block;margin:0 auto 8px}
.live-probabilities{display:grid;grid-template-columns:1fr 1fr .8fr;gap:25px;margin-top:25px;padding:23px;background:white;border:1px solid var(--line);border-radius:8px}
.probability-explainer{padding:24px 15px}.probability-explainer h2{font:28px/1.2 var(--serif);color:var(--ink)}.probability-explainer p{font-size:12px;margin-top:15px;line-height:1.7}
@media(min-width:901px){
 body:not([data-stage="0"]) .topbar{height:62px}
 body:not([data-stage="0"]) .lesson-heading{padding:19px 0 19px}
 body:not([data-stage="0"]) h1{font-size:40px;margin:7px 0}
 body:not([data-stage="0"]) .matrix-host{max-width:410px}
 body:not([data-stage="0"]) .source-card{padding-block:8px}
 body:not([data-stage="0"]) .source-card .source-pair-top{grid-template-columns:35px 1fr}
 body:not([data-stage="0"]) .source-card .illustration{height:35px;width:35px}
 body:not([data-stage="0"]) .source-card .vector-button{font-size:10px;line-height:1.5;padding-block:3px}
 body:not([data-stage="0"]) .calculation-panel{padding:17px 19px}
 body:not([data-stage="0"]) .geometry-svg{max-height:155px}
 body:not([data-stage="0"]) .calculation-panel h2{font-size:24px}
 body[data-stage="6"] .flow-table,body[data-stage="7"] .flow-table{border-spacing:3px 3px}
 body[data-stage="6"] .flow-table td,body[data-stage="7"] .flow-table td{padding:6px 0}
 body[data-stage="6"] .example-selector,body[data-stage="7"] .example-selector{margin:10px 0}
 body[data-stage="6"] .denominator,body[data-stage="7"] .denominator{padding:7px 9px}
 body[data-stage="6"] .result-line,body[data-stage="7"] .result-line{padding:8px 10px;margin-top:8px}
 body[data-stage="6"] .target-line,body[data-stage="7"] .target-line{margin:9px 0 5px}
 .provenance{margin-top:18px;padding:10px 15px}
 .provenance-chain{margin-top:6px}.trace-node{padding:7px 10px}
 .step-footer{margin-top:17px;padding:12px 0}
}
@media(max-width:900px){.live-probabilities{grid-template-columns:1fr 1fr}.probability-explainer{grid-column:1/-1;padding:0}.probability-explainer h2 br{display:none}}
@media(max-width:600px){.live-probabilities{grid-template-columns:1fr;padding:16px}.probability-explainer{grid-column:auto}}

@media(min-width:901px){
 body:not([data-stage="0"]) .lesson-side p{font-size:16px;line-height:1.4}
 body:not([data-stage="0"]) .lesson-heading{padding:14px 0 16px}
 body:not([data-stage="0"]) .topbar{height:58px}
 body:not([data-stage="0"]) h1{font-size:38px}
 body[data-stage="6"] .calculation-panel,body[data-stage="7"] .calculation-panel{padding:14px 17px}
 body[data-stage="6"] .calc-equation,body[data-stage="7"] .calc-equation{line-height:1.3}
 body[data-stage="6"] .denominator,body[data-stage="7"] .denominator{line-height:1.45}
 body[data-stage="6"] .loss-term,body[data-stage="7"] .loss-term{padding-block:4px}
 body[data-stage="6"] .flow-table td,body[data-stage="7"] .flow-table td{padding-block:5px}
}