.lp-a-label { display: flex !important; justify-content: space-between; align-items: center; gap: 12px; }
.calculus-nav { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 14px 18px; margin-bottom: 18px; }
.calculus-nav p { font-size: 13px; color: var(--ink-500); margin: 0 0 10px; }
.calculus-nav > div, .ex-steps, .ex-step-actions, .extrema-panel .area-display-options { display: flex; flex-wrap: wrap; gap: 10px 14px; align-items: center; }
.calculus-nav a { display: inline-block; padding: 8px 12px; border: 1px solid var(--line); border-radius: 6px; font-size: 13px; color: var(--ink-700); }
.calculus-nav a[aria-current="step"] { background: var(--blue-50); border-color: var(--blue-600); color: var(--blue-700); font-weight: 700; }
.extrema-panel [hidden] { display: none !important; }
.ex-controls { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 16px; align-items: end; margin: 20px 0; }
.ex-controls label, .ex-move { display: block; min-width: 0; font-size: 13px; color: var(--ink-700); }
.ex-controls input, .ex-move input { display: block; width: 100%; box-sizing: border-box; margin-top: 8px; padding: 8px; accent-color: var(--blue-600); }
.ex-controls output, .ex-move output { float: right; font-weight: 700; }
.ex-move { margin: 18px 0; }
.ex-steps, .extrema-panel .area-display-options, .ex-step-actions { margin: 18px 0; }
.ex-given { padding: 12px 16px; border-left: 3px solid var(--blue-600); background: var(--blue-50); line-height: 1.8; }
#mathModelsPage .ex-graph, #mathModelsPage .ex-fence-scene { display: block; width: 100%; height: auto; min-height: 0; max-width: 700px; margin: 14px auto; }
#mathModelsPage .ex-fence-scene { max-width: 620px; }
.ex-candidate-table { width: 100%; min-width: 380px; }
.ex-candidate-table .is-maximum { box-shadow: inset 4px 0 #c2410c; }
.ex-candidate-table .is-minimum { background: #f0fdf4; }
.ex-candidate-table .is-minimum.is-maximum { background: #f5f3ff; }
.ex-domain-band { fill: #0284c7; fill-opacity: .06; }
.ex-curve { fill: none; stroke: #1d4ed8; stroke-width: 3.5; }
.ex-curve.ex-all-extrema { stroke: #7c3aed; stroke-width: 4; }
.ex-outside-curve { fill: none; stroke: #64748b; stroke-width: 2.5; opacity: .35; }
.ex-boundary, .ex-guide { stroke: #64748b; stroke-width: 1.4; stroke-dasharray: 5 4; }
.ex-interval-line { stroke: #7c3aed; stroke-width: 4; }
.ex-candidate { fill: var(--card); stroke: #475569; stroke-width: 3; }
.ex-candidate.ex-max { stroke: #c2410c; stroke-width: 4; }
.ex-candidate.ex-min { stroke: #15803d; stroke-width: 4; }
.ex-candidate.ex-max.ex-min { stroke: #7c3aed; }
.ex-candidate.ex-excluded { stroke: #64748b; stroke-dasharray: 3 2; }
.ex-p { fill: #1d4ed8; stroke: var(--card); stroke-width: 2; }
.ex-endpoint { fill: #7c3aed; stroke: var(--card); stroke-width: 2; }
.ex-hit { fill: transparent; }
.ex-tick { font-size: 20px; fill: var(--ink-700); }
.ex-label, .ex-caption { font-size: 21px; fill: var(--ink-900); font-weight: 600; paint-order: stroke; stroke: var(--card); stroke-width: 4px; stroke-linejoin: round; }
[data-ex-handle], [data-ex-scene-handle] { cursor: grab; touch-action: none; }
[data-ex-handle]:focus, [data-ex-scene-handle]:focus { outline: none; }
[data-ex-handle]:focus .ex-p, [data-ex-handle]:focus .ex-endpoint, [data-ex-scene-handle]:focus .ex-p { stroke: #c2410c; stroke-width: 5; }
.ex-fence-area { fill: #0d9488; fill-opacity: .12; }
.ex-fence-line { stroke: #0f766e; stroke-width: 5; }
.ex-wall { fill: #94a3b8; }
@media(max-width:560px) { .ex-controls { grid-template-columns: 1fr; } .ex-hit { r: 50px; } .ex-label, .ex-caption, .ex-tick { font-size: 30px; } .ex-caption { font-size: 25px; } }
#mathModelsPage .ds-graph { min-height: 0; height: auto; width: 100%; max-width: 600px; display: block; margin: 22px auto 0; }
.derivative-sign-panel [hidden] { display: none !important; }
.ds-controls { display: grid; grid-template-columns: 140px minmax(180px,1fr) 180px; gap: 18px; align-items: end; margin: 18px 0; }
.ds-controls label { min-width: 0; font-size: 13px; color: var(--ink-700); }
.ds-controls input, .ds-controls select { display: block; width: 100%; box-sizing: border-box; margin-top: 8px; padding: 8px; accent-color: var(--blue-600); }
.ds-controls output { float: right; font-weight: 700; }
.derivative-sign-panel .area-display-options, .ds-legend, .ds-next { display: flex; flex-wrap: wrap; gap: 12px 18px; margin: 18px 0; align-items: center; }
.ds-legend span { padding: 6px 10px; background: var(--bg); border: 1px solid var(--line); border-radius: 6px; font-weight: 600; }
.ds-positive { color: #166534; }
.ds-negative { color: #9a3412; }
.ds-zero { color: #475569; }
.ds-key-point-group { display: inline-flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 5px 14px 5px 0; font-size: 13px; }
.ds-sign-table, .ds-extrema-table { width: 100%; min-width: 360px; }
.ds-sign-table .is-selected, .ds-extrema-table .is-selected { background: var(--blue-50); }
.ds-band.ds-positive { fill: #16a34a; fill-opacity: .07; }
.ds-band.ds-negative { fill: #ea580c; fill-opacity: .08; }
.ds-band.ds-zero { fill: #64748b; fill-opacity: .06; }
.ds-original-curve { fill: none; stroke: #1d4ed8; stroke-width: 3.5; }
.ds-derivative-curve { fill: none; stroke-width: 3.5; }
.ds-derivative-curve.ds-positive, .ds-tangent.ds-positive { stroke: #166534; }
.ds-derivative-curve.ds-negative, .ds-tangent.ds-negative { stroke: #c2410c; stroke-dasharray: 9 5; }
.ds-derivative-curve.ds-zero, .ds-tangent.ds-zero { stroke: #475569; }
.ds-tangent { stroke-width: 2.5; stroke-dasharray: 6 4; }
.ds-guide { stroke: #64748b; stroke-width: 1.5; stroke-dasharray: 4 4; }
.ds-critical { fill: var(--card); stroke: #475569; stroke-width: 2.5; }
.ds-critical.ds-maximum { stroke: #9a3412; }
.ds-critical.ds-minimum { stroke: #166534; }
.ds-p-dot { fill: #1d4ed8; stroke: var(--card); stroke-width: 2; }
.ds-d-dot { fill: currentColor; stroke: var(--card); stroke-width: 2; }
.ds-tick { font-size: 20px; fill: var(--ink-700); }
.ds-caption, .ds-critical-label, .ds-point-label { font-size: 21px; font-weight: 600; fill: var(--ink-900); paint-order: stroke; stroke: var(--card); stroke-width: 4px; stroke-linejoin: round; }
[data-ds-handle] { cursor: grab; touch-action: none; }
[data-ds-handle]:focus { outline: none; }
[data-ds-handle]:focus .ds-p-dot, [data-ds-handle]:focus .ds-d-dot { stroke: #7c3aed; stroke-width: 5; }
@media(max-width:560px) { .ds-controls { grid-template-columns: 1fr; } .ds-graph .trig-point-hit { r: 55px; } .ds-tick { font-size: 30px; } .ds-caption, .ds-critical-label, .ds-point-label { font-size: 30px; } }
#mathModelsPage .sequence-graph, #mathModelsPage .derivative-graph { min-height: 0; height: auto; width: 100%; max-width: 760px; display: block; margin: 0 auto; }
.sequence-panel .area-display-options, .derivative-panel .area-display-options { display: flex; flex-wrap: wrap; gap: 12px 20px; margin: 18px 0; }
.sequence-panel .sequence-settings { grid-template-columns: repeat(3,minmax(0,1fr)); }
.sequence-settings [hidden] { display: none !important; }
.sequence-dot { fill: #1d4ed8; stroke: var(--card); stroke-width: 2; }
.sequence-dot.is-selected { fill: #7c3aed; stroke: #c2410c; stroke-width: 3; }
[data-sq-n], [data-dv-handle] { cursor: pointer; }
[data-dv-handle] { touch-action: none; cursor: grab; }
[data-sq-n]:focus, [data-dv-handle]:focus { outline: none; }
[data-sq-n]:focus circle:not(.trig-point-hit), [data-dv-handle]:focus .derivative-p, [data-dv-handle]:focus .derivative-q { stroke: #c2410c; stroke-width: 5; }
.sequence-table, .derivative-table { width: 100%; min-width: 300px; }
.sequence-table .is-selected { background: var(--blue-50); }
.sequence-panel .translation-proof p { overflow-wrap: anywhere; }
.derivative-function { fill: none; stroke: #1d4ed8; stroke-width: 3.5; }
.derivative-secant { stroke: #c2410c; stroke-width: 3.5; stroke-dasharray: 9 6; }
.derivative-tangent { stroke: #7c3aed; stroke-width: 3; }
.derivative-p { fill: #1d4ed8; stroke: var(--card); stroke-width: 2; }
.derivative-q { fill: #c2410c; stroke: var(--card); stroke-width: 2; }
.derivative-panel input[type="number"] { width: 100%; box-sizing: border-box; padding: 8px; }
@media(max-width:560px) { .sequence-panel .sequence-settings { grid-template-columns: 1fr; } .sequence-graph .trig-point-hit, .derivative-graph .trig-point-hit { r: 55px; } .sequence-graph .two-lines-tick { font-size: 23px; } .derivative-graph .two-lines-tick { font-size: 23px; } }
.lp-a-label select { min-width: 90px; padding: 7px; }
.stretch-panel .translation-formulas p { overflow-wrap: anywhere; margin: 9px 0 0; color: var(--ink-700); font-size: 14px; }
.stretch-steps { margin-top: 15px; }
#mathModelsPage .translation-panel .translation-graph { min-height: 0; height: auto; }
[data-st-handle] { cursor: grab; touch-action: none; }
[data-st-handle]:focus { outline: none; }
[data-st-handle]:focus .translation-dot-p, [data-st-handle]:focus .translation-dot-q { stroke: #c2410c; stroke-width: 5; }
.translation-formulas, .translation-readings { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin: 18px 0; }
.translation-formulas > div, .translation-readings > div { min-width: 0; padding: 13px 16px; border: 1px solid var(--line); border-radius: var(--radius-sm); }
.translation-formulas span, .translation-readings span { display: block; color: var(--ink-500); font-size: 12px; margin-bottom: 8px; }
.translation-formulas strong { color: #1d4ed8; font-size: 21px; overflow-wrap: anywhere; }
.translation-formulas > div + div strong { color: #7c3aed; }
.translation-settings { display: grid; grid-template-columns: 1fr 1fr 160px; gap: 20px; align-items: end; margin: 18px 0; }
.translation-settings label, .translation-point-controls label, .translation-playback label { min-width: 0; color: var(--ink-700); font-size: 12px; }
.translation-settings input, .translation-point-controls input[type="range"], .translation-playback input { display: block; width: 100%; margin-top: 10px; accent-color: var(--blue-600); }
.translation-settings output, .translation-playback output { float: right; font-weight: 700; }
.translation-settings select, .translation-point-controls input[type="number"] { display: block; width: 100%; margin-top: 7px; padding: 8px; }
.translation-presets { margin: 16px 0; }
.translation-panel .area-display-options { flex-wrap: wrap; margin: 18px 0; gap: 10px 18px; }
.translation-playback { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; border-top: 1px solid var(--line); padding-top: 18px; }
.translation-playback > label { flex: 1 1 180px; }
.translation-status { font-size: 12px; color: var(--ink-700); margin-top: 10px; min-height: 1em; }
.translation-stage { background: var(--blue-50); padding: 14px 18px; border-radius: var(--radius-sm); overflow-wrap: anywhere; }
.translation-stage strong { color: var(--ink-900); font-size: 16px; }
.translation-stage p, .translation-proof p { color: var(--ink-700); font-size: 13px; line-height: 1.85; margin: 8px 0 0; }
.translation-point-controls { display: grid; grid-template-columns: 185px 1fr; gap: 20px; align-items: center; margin: 20px 0; }
.translation-readings { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.translation-readings strong { color: var(--ink-900); font-size: 16px; overflow-wrap: anywhere; }
.math-models-page .translation-panel .translation-graph { min-height: 0; height: auto; width: 100%; max-width: 680px; max-height: none; display: block; margin: 0 auto; }
.translation-curve { fill: none; stroke-linejoin: round; }
.translation-base { stroke: #1d4ed8; stroke-width: 3.5; stroke-dasharray: 9 7; }
.translation-current { stroke: #7c3aed; stroke-width: 4.5; }
.translation-arrow { stroke: #c2410c; stroke-width: 2.5; stroke-dasharray: 5 4; }
.translation-vertex { fill: var(--card); stroke: #c2410c; stroke-width: 2.5; }
.translation-dot-p { fill: #1d4ed8; stroke: var(--card); stroke-width: 2.5; }
.translation-dot-q { fill: #7c3aed; stroke: var(--card); stroke-width: 2.5; }
.translation-merged { stroke: #7c3aed; stroke-width: 4; }
[data-tr-handle] { cursor: grab; touch-action: none; }
[data-tr-handle]:focus { outline: none; }
[data-tr-handle]:focus .translation-dot-p, [data-tr-handle]:focus .translation-dot-q { stroke: #c2410c; stroke-width: 5; }
.translation-proof { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 16px; margin: 18px 0; }
.translation-proof h4 { margin: 0; font-size: 15px; }
.translation-table { min-width: 650px; }
.translation-table th { width: 120px; }
@media (max-width: 700px) { .translation-settings { grid-template-columns: 1fr 1fr; } .translation-settings > label:last-child { grid-column: 1 / -1; } .translation-readings { grid-template-columns: 1fr; gap: 7px; } }
@media (max-width: 560px) { .translation-formulas, .translation-point-controls { grid-template-columns: 1fr; } .translation-settings { gap: 16px; } .translation-graph .two-lines-tick { font-size: 23px; } .translation-graph .two-lines-point-label { font-size: 27px; } .translation-graph .trig-point-hit { r: 55px; } .translation-playback > .linear-presets { width: 100%; } }
.lp-panel .two-lines-equation > strong { overflow-wrap: anywhere; }
.lp-relation { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; font-size: 12px; margin: 14px 0; color: var(--ink-700); }
.lp-relation select { min-width: 0; max-width: 100%; padding: 8px; }
.lp-panel .two-lines-proof p, .lp-panel .two-lines-comparison p { overflow-wrap: anywhere; }
[data-lp-handle] { cursor: ew-resize; }
[data-lp-handle]:focus { outline: none; }
[data-lp-handle]:focus .two-lines-probe { stroke: #c2410c; stroke-width: 5; }
.two-lines-parameters { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 16px 0; }
.two-lines-equation { min-width: 0; border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 12px 16px; margin: 0; }
.two-lines-equation legend { padding: 0 6px; font-size: 12px; }
.two-lines-equation > strong { display: block; font-size: 20px; margin-bottom: 12px; }
.two-lines-equation label { display: block; margin: 12px 0; font-size: 12px; color: var(--ink-700); }
.two-lines-equation output { float: right; font-weight: 700; }
.two-lines-equation input, .two-lines-controls input[type="range"] { display: block; width: 100%; margin-top: 10px; accent-color: var(--blue-600); }
.two-lines-equation small { color: var(--ink-500); font-size: 11px; }
.two-lines-color-1 { color: #1d4ed8; }
.two-lines-color-2 { color: #7c3aed; }
.two-lines-controls { display: grid; grid-template-columns: 130px 1fr 160px auto; gap: 14px; align-items: center; }
.two-lines-controls label { min-width: 0; color: var(--ink-700); font-size: 12px; }
.two-lines-controls input[type="number"], .two-lines-controls select { display: block; width: 100%; margin-top: 7px; padding: 8px; }
.two-lines-panel .area-display-options { flex-wrap: wrap; margin: 16px 0; }
.two-lines-answer { background: var(--blue-50); padding: 15px 18px; border-radius: var(--radius-sm); margin-top: 15px; overflow-wrap: anywhere; }
.two-lines-answer strong { font-size: 16px; color: var(--ink-900); }
.two-lines-answer p, .two-lines-proof p, .two-lines-comparison p { color: var(--ink-700); font-size: 13px; line-height: 1.85; margin: 8px 0; }
.two-lines-answer p:last-child { margin-bottom: 0; }
.two-lines-reading { text-align: center; font-size: 14px; font-weight: 600; color: var(--ink-900); padding: 12px 0; margin: 8px 0 0; }
.math-models-page .two-lines-panel .two-lines-graph { min-height: 0; height: auto; width: 100%; max-height: none; touch-action: none; }
.two-lines-line { fill: none; }
.two-lines-line-1 { stroke: #1d4ed8; stroke-width: 5; }
.two-lines-line-2 { stroke: #7c3aed; stroke-width: 3.5; stroke-dasharray: 11 8; }
.two-lines-dot-1 { fill: #1d4ed8; stroke: var(--card); stroke-width: 2; }
.two-lines-dot-2 { fill: #7c3aed; stroke: var(--card); stroke-width: 2; }
.two-lines-intersection { fill: #c2410c; stroke: var(--card); stroke-width: 3; }
.two-lines-probe { fill: var(--card); stroke: var(--ink-900); stroke-width: 3; }
.two-lines-tick { fill: var(--ink-700); font-size: 18px; paint-order: stroke; stroke: var(--card); stroke-width: 3; }
.two-lines-axis-label, .two-lines-point-label { fill: var(--ink-900); font-size: 22px; font-weight: 700; paint-order: stroke; stroke: var(--card); stroke-width: 4; }
.two-lines-band-1 { fill: #dbeafe; opacity: .45; }
.two-lines-band-2 { fill: #ede9fe; opacity: .45; }
[data-two-handle] { cursor: ew-resize; }
[data-two-handle]:focus { outline: none; }
[data-two-handle]:focus .two-lines-probe { stroke: #c2410c; stroke-width: 5; }
.two-lines-proof, .two-lines-comparison { border: 1px solid var(--line); padding: 14px; margin: 16px 0; border-radius: var(--radius-sm); }
.two-lines-proof summary { cursor: pointer; color: var(--ink-700); font-size: 13px; }
.two-lines-comparison h4 { margin: 0; font-size: 14px; }
.two-lines-comparison small { color: var(--ink-500); font-size: 11px; }
.two-lines-panel .linear-value-table { min-width: 650px; }
@media (max-width: 800px) { .two-lines-controls { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .two-lines-parameters, .two-lines-controls { grid-template-columns: 1fr; } .two-lines-tick { font-size: 24px; } .two-lines-axis-label, .two-lines-point-label { font-size: 28px; } }
.math-model-jump { display: inline-block; margin-top: 9px; font-size: 12px; }
.math-model-subgroup { border-top: 1px solid var(--line-soft); margin: 4px 0; }
.math-model-subgroup summary { padding: 10px 7px; color: var(--ink-700); cursor: pointer; font-size: 12px; font-weight: 600; }
.math-model-subgroup summary small { float: right; color: var(--ink-500); font-weight: 400; font-size: 10px; }
.math-model-subgroup summary:focus-visible { outline: 2px solid var(--blue-600); outline-offset: -2px; }
#modelTitle { scroll-margin-top: 85px; }
.piecewise-scenes { margin: 15px 0 10px; }
.piecewise-scene-note, .piecewise-graph-note { color: var(--ink-700); font-size: 13px; line-height: 1.8; }
.piecewise-settings { padding: 12px 15px; border: 1px solid var(--line); border-radius: var(--radius-sm); margin: 12px 0; }
.piecewise-settings summary { font-size: 13px; color: var(--ink-700); cursor: pointer; }
.piecewise-parameters { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 15px; margin: 15px 0; }
.piecewise-parameters[hidden] { display: none; }
.piecewise-parameters label { color: var(--ink-700); font-size: 12px; }
.piecewise-parameters output { float: right; color: var(--blue-600); font-weight: 700; }
.piecewise-parameters input, .piecewise-probe-controls input[type="range"] { width: 100%; accent-color: var(--blue-600); display: block; margin-top: 12px; }
.piecewise-rules { margin: 16px 0; padding: 15px; border-radius: var(--radius-sm); background: var(--blue-50); }
.piecewise-rules > strong { font-size: 13px; color: var(--ink-700); }
.piecewise-rule { display: grid; grid-template-columns: minmax(140px, 1fr) minmax(135px, 1fr) 1.3fr; gap: 8px 15px; padding: 10px 12px; border-left: 3px solid transparent; border-radius: 4px; margin-top: 7px; align-items: center; font-size: 13px; }
.piecewise-rule.is-active { background: var(--card); border-left-color: currentColor; box-shadow: 0 1px 6px rgba(0,0,0,.07); }
.piecewise-rule small { color: var(--ink-500); font-size: 11px; }
.piecewise-probe-controls { display: grid; grid-template-columns: 170px 1fr 170px; gap: 18px; align-items: center; }
.piecewise-probe-controls > label { min-width: 0; font-size: 12px; color: var(--ink-700); }
.piecewise-probe-controls input[type="number"] { display: block; width: 100%; margin-top: 7px; padding: 8px; }
.piecewise-probe-controls .area-display-options { flex-direction: column; align-items: flex-start; }
.piecewise-reading { margin: 16px 0 5px; background: var(--blue-50); border-radius: var(--radius-sm); padding: 12px; text-align: center; color: var(--ink-900); font-size: 14px; font-weight: 600; }
.piecewise-canvases { max-width: 860px; margin: auto; }
.math-models-page .piecewise-panel .piecewise-graph { min-height: 0; height: auto; width: 100%; max-height: none; touch-action: none; }
.piecewise-color-0 { color: #1d4ed8; }
.piecewise-color-1 { color: #0f766e; }
.piecewise-color-2 { color: #7c3aed; }
.piecewise-line { stroke: currentColor; stroke-width: 3.5; fill: none; }
.piecewise-endpoint { stroke: currentColor; stroke-width: 2.5; fill: var(--card); }
.piecewise-endpoint.is-closed { fill: currentColor; }
.piecewise-divider { stroke: var(--ink-400); stroke-width: 1.5; stroke-dasharray: 4 6; }
.piecewise-tick { fill: var(--ink-700); font-size: 18px; }
.piecewise-axis-label { fill: var(--ink-900); font-size: 18px; }
.piecewise-point-label { fill: var(--ink-900); font-size: 22px; font-weight: 700; paint-order: stroke; stroke: var(--card); stroke-width: 4; }
[data-piecewise-handle]:focus { outline: none; }
[data-piecewise-handle]:focus .trig-point { stroke: var(--ink-900); stroke-width: 4; }
.piecewise-boundary, .piecewise-calculation { margin-top: 16px; padding: 14px; border: 1px solid var(--line); border-radius: var(--radius-sm); }
.piecewise-boundary h4, .piecewise-calculation h4 { margin: 0; font-size: 14px; }
.piecewise-boundary-head { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.piecewise-boundary-head label { display: flex; align-items: center; gap: 8px; font-size: 12px; white-space: nowrap; }
.piecewise-boundary-buttons { display: flex; flex-wrap: wrap; gap: 8px; margin: 13px 0 8px; }
.piecewise-boundary p, .piecewise-calculation p { color: var(--ink-700); font-size: 12px; line-height: 1.8; margin: 8px 0; }
.piecewise-calculation strong { font-size: 14px; color: var(--ink-900); }
.piecewise-value-table { min-width: 650px; }
@media (max-width: 700px) { .piecewise-parameters, .piecewise-probe-controls { grid-template-columns: 1fr; } .piecewise-rule { grid-template-columns: 1fr; } .piecewise-probe-controls .area-display-options { flex-direction: row; } .piecewise-tick, .piecewise-axis-label { font-size: 24px; } }
.absolute-views { margin: 12px 0; }
.absolute-parameters { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin: 14px 0; }
.absolute-parameters label { padding: 12px; background: var(--blue-50); border-radius: var(--radius-sm); font-size: 13px; color: var(--ink-700); }
.absolute-parameters output { float: right; color: var(--blue-600); font-weight: 700; }
.absolute-parameters input, .absolute-fold-controls input, .absolute-point-controls input[type="range"] { width: 100%; display: block; accent-color: var(--blue-600); margin: 12px 0; }
.absolute-parameters small, .absolute-point-controls small, .absolute-fold-controls small { display: block; color: var(--ink-500); font-size: 11px; line-height: 1.7; }
.absolute-point-controls { display: grid; grid-template-columns: 1fr 1.4fr 1fr auto; gap: 14px; align-items: center; margin: 15px 0; }
.absolute-point-controls label { min-width: 0; font-size: 12px; color: var(--ink-700); }
.absolute-point-controls input[type="number"], .absolute-point-controls select { display: block; width: 100%; margin: 7px 0; padding: 8px; }
.absolute-fold-controls { padding: 14px; background: var(--blue-50); border-radius: var(--radius-sm); font-size: 12px; }
.absolute-fold-controls p { margin: 0; color: var(--ink-700); }
.absolute-canvases { max-width: 760px; margin: 0 auto; }
.math-models-page .absolute-panel .absolute-graph { min-height: 0; height: auto; width: 100%; max-height: none; }
.absolute-distance-panel { padding-top: 15px; border-top: 1px solid var(--line); }
.absolute-distance-panel h4 { font-size: 13px; color: var(--ink-900); margin-bottom: 5px; }
.absolute-distance-panel svg { display: block; width: 100%; height: auto; touch-action: none; }
.absolute-distance-panel p, .absolute-fold-note { color: var(--ink-700); font-size: 12px; line-height: 1.8; }
.absolute-graph { touch-action: none; }
.absolute-curve { stroke: #1d4ed8; stroke-width: 4; fill: none; stroke-linecap: round; }
.absolute-main-key { color: #1d4ed8; }
.absolute-reference { stroke: #64748b; stroke-width: 2; stroke-dasharray: 9 6; }
.absolute-reference-key { color: #64748b; }
.absolute-symmetry { stroke: #7c3aed; stroke-width: 2; stroke-dasharray: 5 6; }
.absolute-tick { font-size: 21px; fill: var(--ink-500); }
.absolute-point-label { font-size: 23px; fill: var(--ink-900); font-weight: 600; paint-order: stroke; stroke: var(--card); stroke-width: 4; }
.absolute-panel .absolute-handle-V, .absolute-panel .absolute-handle-H, .absolute-vertex-dot { fill: #7c3aed; }
.math-models-page.is-presentation .absolute-panel .absolute-graph { min-height: 0; }
.absolute-distance-bar { stroke: #0f766e; stroke-width: 4; }
.absolute-distance-label { fill: #0f766e; font-size: 23px; }
.absolute-value-table { min-width: 650px; }
[data-absolute-handle]:focus { outline: none; }
[data-absolute-handle]:focus .trig-point { stroke: var(--ink-900); stroke-width: 4; }
@media (max-width: 700px) { .absolute-parameters { grid-template-columns: 1fr; } .absolute-point-controls { grid-template-columns: 1fr 1fr; } .absolute-tick { font-size: 24px; } }
.wave-parameters { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin: 16px 0; }
.wave-parameters label { padding: 12px; background: var(--blue-50); border-radius: var(--radius-sm); color: var(--ink-900); font-size: 13px; }
.wave-parameters output { float: right; font-weight: 700; color: var(--blue-600); }
.wave-parameters input, .wave-probe-label input { display: block; width: 100%; accent-color: var(--blue-600); margin: 12px 0; }
.wave-parameters small { display: block; font-size: 11px; color: var(--ink-500); line-height: 1.7; }
.wave-graph-note { min-height: 36px; color: var(--ink-700); font-size: 12px; line-height: 1.8; }
.wave-panel .wave-settings { grid-template-columns: 140px 1fr 1fr; }
.wave-asymptote { stroke: #b45309; stroke-width: 2; stroke-dasharray: 8 6; }
.wave-asymptote-key { color: #b45309; }
.wave-reference-curve { fill: none; stroke: #64748b; stroke-width: 2; stroke-dasharray: 8 5; }
.wave-reference-key { color: #64748b; }
.wave-tick-text { font-size: 16px; fill: var(--ink-700); }
.wave-key-point { fill: var(--card); stroke: #1d4ed8; stroke-width: 2.5; }
.wave-key-label { font-size: 17px; fill: #1d4ed8; paint-order: stroke; stroke: var(--card); stroke-width: 3px; }
.wave-undefined { font-size: 17px; fill: #b45309; }
.wave-probe-label { display: block; color: var(--ink-700); font-size: 12px; }
.wave-value-table { min-width: 720px; }
[data-wave-point]:focus { outline: none; }
[data-wave-point]:focus .trig-point { stroke: var(--ink-900); stroke-width: 4; }
@media (max-width: 700px) { .wave-parameters { grid-template-columns: 1fr; gap: 8px; } .wave-panel .wave-settings { grid-template-columns: 1fr; } }
.trig-settings { display: grid; grid-template-columns: 140px 1fr 1.5fr; gap: 15px; align-items: start; margin: 14px 0; }
.trig-settings label, .trig-playback label, .trig-panel .linear-presets label { min-width: 0; color: var(--ink-700); font-size: 12px; }
.trig-settings input, .trig-settings select { display: block; width: 100%; padding: 8px; margin-top: 6px; }
.trig-settings input[type="range"] { padding: 0; margin-top: 17px; accent-color: var(--blue-600); }
.trig-settings small { display: block; margin-top: 4px; color: var(--ink-500); font-size: 11px; line-height: 1.7; }
.trig-error { border-left: 3px solid var(--amber); padding: 10px; background: var(--blue-50); color: var(--ink-900); font-size: 13px; }
.trig-presets { margin: 12px 0; }
.trig-playback { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin: 14px 0; }
.trig-playback select { padding: 4px; margin-left: 5px; }
.trig-playback > span { font-size: 11px; color: var(--ink-500); }
.trig-legend { display: flex; gap: 8px 20px; flex-wrap: wrap; font-size: 12px; margin: 12px 0; }
.trig-sin { --trig-color: #1d4ed8; color: #1d4ed8; }
.trig-cos { --trig-color: #7c3aed; color: #7c3aed; }
.trig-canvases { display: grid; grid-template-columns: .85fr 1.5fr; gap: 14px; align-items: start; }
.trig-figure { min-width: 0; border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 9px 6px; }
.trig-figure h4 { margin: 0 5px; color: var(--ink-900); font-size: 13px; }
.trig-figure h4 small { display: block; margin-top: 4px; font-size: 10px; color: var(--ink-500); font-weight: 400; }
.trig-figure > p { margin: 0 5px; font-size: 11px; min-height: 36px; color: var(--ink-700); line-height: 1.7; }
.math-models-page .trig-panel .math-model-svg { min-height: 0; height: auto; }
.trig-unit-circle { fill: var(--blue-50); stroke: var(--ink-700); stroke-width: 2; }
.trig-tick-text { fill: var(--ink-500); font-size: 17px; }
.trig-axis-label { fill: var(--ink-700); font-size: 20px; }
.trig-radius { stroke: var(--ink-500); stroke-width: 2; }
.trig-component { stroke: var(--trig-color); stroke-width: 5; }
.trig-component.is-muted { opacity: .4; stroke-width: 3; }
.trig-component.trig-cos { stroke-dasharray: 7 4; }
.trig-angle-arc { fill: none; stroke: var(--amber); stroke-width: 2; }
.trig-period-band { fill: var(--blue-100); opacity: .45; }
.trig-curve { fill: none; stroke: var(--trig-color); stroke-width: 2.5; stroke-linecap: round; }
.trig-curve.is-primary { stroke-width: 3.5; }
.trig-curve.trig-cos { stroke-dasharray: 8 5; }
.trig-guide { stroke: var(--ink-400); stroke-width: 1.5; stroke-dasharray: 3 4; }
.trig-point-hit { fill: transparent; cursor: grab; }
.trig-point { fill: var(--amber); stroke: var(--card); stroke-width: 2; cursor: grab; }
.trig-other-point { fill: var(--card); stroke: var(--trig-color); stroke-width: 3; }
.trig-point-label { fill: var(--ink-900); font-size: 19px; font-weight: 600; paint-order: stroke; stroke: var(--card); stroke-width: 4px; }
[data-trig-point]:focus { outline: none; }
[data-trig-point]:focus .trig-point { stroke: var(--ink-900); stroke-width: 4; }
.trig-properties { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 14px; }
.trig-properties p { margin: 0; padding: 12px; background: var(--blue-50); border-radius: var(--radius-sm); color: var(--ink-700); font-size: 13px; line-height: 1.8; }
.trig-properties strong, .trig-properties span { display: block; }
.trig-properties strong { color: var(--ink-900); margin-bottom: 4px; }
.trig-value-table { min-width: 680px; }
.math-models-page.is-presentation .trig-panel .math-model-svg { min-height: 0; max-height: 65vh; }
@media (max-width: 900px) { .trig-canvases { grid-template-columns: 1fr; } .trig-circle-svg { max-width: 360px; margin: 0 auto; } }
@media (max-width: 620px) { .trig-settings { grid-template-columns: 1fr 1fr; } .trig-angle-slider { grid-column: 1 / -1; } .trig-properties { grid-template-columns: 1fr; } .trig-graph-svg .trig-tick-text { font-size: 24px; } .trig-graph-svg .trig-axis-label, .trig-graph-svg .trig-point-label { font-size: 27px; } }
.logarithm-settings { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 15px; }
.logarithm-settings label { color: var(--ink-700); font-size: 13px; min-width: 0; }
.logarithm-settings input { display: block; width: 100%; padding: 8px 10px; margin-top: 8px; font-size: 14px; }
.logarithm-settings small { display: block; margin-top: 5px; color: var(--ink-500); font-size: 11px; line-height: 1.7; }
.logarithm-settings output { float: right; color: var(--blue-700); font-weight: 700; }
.logarithm-settings input[type="range"] { padding: 0; accent-color: var(--blue-600); }
.logarithm-error { border-left: 3px solid var(--amber); background: var(--blue-50); padding: 10px 12px; color: var(--ink-900); font-size: 13px; line-height: 1.8; }
.logarithm-inverse-option { margin-top: 14px; }
.logarithm-legend { display: flex; flex-wrap: wrap; gap: 10px 20px; margin-top: 15px; color: var(--ink-700); font-size: 12px; }
.logarithm-legend > span { display: flex; align-items: center; gap: 5px; }
.logarithm-swatch { display: inline-block; width: 25px; border-top: 4px solid var(--blue-700); }
.logarithm-swatch.is-inverse { border-top: 3px dashed var(--purple); }
.logarithm-swatch.is-mirror { border-top: 2px dashed var(--ink-500); }
.logarithm-curve { fill: none; stroke: var(--blue-700); stroke-width: 4; stroke-linecap: round; }
.logarithm-inverse { fill: none; stroke: var(--purple); stroke-width: 3; stroke-dasharray: 9 6; }
.logarithm-mirror { fill: none; stroke: var(--ink-500); stroke-width: 2; stroke-dasharray: 6 6; }
.logarithm-fixed { fill: var(--amber); stroke: var(--card); stroke-width: 2; }
.logarithm-fixed-text { fill: var(--amber); font-size: 19px; paint-order: stroke; stroke: var(--card); stroke-width: 5px; }
.logarithm-q { fill: var(--card); stroke: var(--purple); stroke-width: 3; }
.logarithm-q-text { fill: var(--purple); font-size: 19px; font-weight: 600; paint-order: stroke; stroke: var(--card); stroke-width: 5px; }
.logarithm-panel .logarithm-point-controls > label:first-child { flex: 1 1 180px; color: var(--ink-700); font-size: 13px; }
.logarithm-point-controls output { float: right; color: var(--blue-700); font-weight: 700; }
.logarithm-point-controls input { display: block; width: 100%; padding: 0; margin-top: 10px; accent-color: var(--blue-600); }
.logarithm-properties { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 14px; }
.logarithm-properties p { margin: 0; padding: 12px; background: var(--blue-50); border-radius: var(--radius-sm); color: var(--ink-700); font-size: 13px; line-height: 1.8; }
.logarithm-properties strong, .logarithm-properties span { display: block; }
.logarithm-properties strong { color: var(--ink-900); font-weight: 600; margin-bottom: 3px; }
.logarithm-value-table { min-width: 620px; }
.logarithm-value-table th:first-child { width: 135px; overflow-wrap: anywhere; }
.log-undefined { color: var(--ink-500); font-size: 11px; }
[data-log-point]:focus { outline: none; }
[data-log-point]:focus .linear-point { stroke: var(--ink-900); stroke-width: 4; }
@media (max-width: 620px) { .logarithm-settings, .logarithm-properties { grid-template-columns: 1fr; } .logarithm-fixed-text { font-size: 26px; } }
.exponential-settings { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 15px; }
.exponential-settings label { color: var(--ink-700); font-size: 13px; min-width: 0; }
.exponential-settings input, .exponential-settings select { display: block; width: 100%; padding: 8px 10px; margin-top: 8px; font-size: 14px; }
.exponential-settings small { display: block; margin-top: 5px; color: var(--ink-500); font-size: 11px; line-height: 1.7; }
.exponential-base-slider { display: block; margin-top: 14px; color: var(--ink-700); font-size: 13px; }
.exponential-base-slider output, .exponential-point-controls output { float: right; color: var(--blue-700); font-weight: 700; }
.exponential-base-slider input, .exponential-point-controls input { display: block; width: 100%; padding: 0; margin-top: 10px; accent-color: var(--blue-600); }
.exponential-error { border-left: 3px solid var(--amber); background: var(--blue-50); padding: 10px 12px; color: var(--ink-900); font-size: 13px; line-height: 1.8; }
.exponential-legend { display: flex; flex-wrap: wrap; gap: 10px 20px; margin-top: 16px; color: var(--ink-700); font-size: 12px; }
.exponential-legend > span { display: flex; align-items: center; gap: 5px; }
.exponential-swatch { display: inline-block; width: 25px; border-top: 3px solid var(--blue-700); }
.exponential-swatch.is-comparison { border-top: 3px dashed var(--purple); }
.exponential-curve { fill: none; stroke: var(--blue-700); stroke-width: 4; stroke-linecap: round; }
.exponential-curve.is-comparison { stroke: var(--purple); stroke-width: 3; stroke-dasharray: 9 6; }
.exponential-fixed { fill: var(--purple); stroke: var(--card); stroke-width: 2; }
.exponential-fixed-text { fill: var(--purple); font-size: 19px; paint-order: stroke; stroke: var(--card); stroke-width: 5px; stroke-linejoin: round; }
.exponential-compare-point { fill: var(--card); stroke: var(--purple); stroke-width: 3; }
.exponential-panel .exponential-point-controls > label:first-child { flex: 1 1 180px; color: var(--ink-700); font-size: 13px; }
.exponential-properties { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 14px; }
.exponential-properties p { margin: 0; padding: 12px; background: var(--blue-50); border-radius: var(--radius-sm); color: var(--ink-700); font-size: 13px; line-height: 1.8; }
.exponential-properties strong, .exponential-properties span { display: block; }
.exponential-properties strong { color: var(--ink-900); font-weight: 600; margin-bottom: 3px; }
.exponential-value-table { min-width: 540px; }
.exponential-value-table th:first-child { width: 145px; overflow-wrap: anywhere; }
[data-exp-point]:focus { outline: none; }
[data-exp-point]:focus .linear-point { stroke: var(--ink-900); stroke-width: 4; }
@media (max-width: 620px) { .exponential-settings { grid-template-columns: 1fr 1fr; } .exponential-properties { grid-template-columns: 1fr; } .exponential-fixed-text { font-size: 26px; } }
.power-comparisons { display: flex; flex-wrap: wrap; gap: 10px 18px; padding: 12px 14px; margin: 0; border: 1px solid var(--line); border-radius: var(--radius-sm); }
.power-comparisons legend { color: var(--ink-500); font-size: 12px; padding: 0 6px; }
.power-comparisons label { display: flex; align-items: center; gap: 6px; color: var(--ink-700); font-size: 13px; cursor: pointer; }
.power-linear { --power-color: var(--blue-700); --power-dash: none; }
.power-square { --power-color: var(--purple); --power-dash: 12 4; }
.power-cube { --power-color: var(--amber); --power-dash: 3 5; }
.power-reciprocal { --power-color: var(--ink-700); --power-dash: 12 4 3 4; }
.power-root { --power-color: var(--green); --power-dash: 7 5; }
.power-swatch { display: inline-block; width: 28px; height: 8px; overflow: visible; }
.power-swatch path { fill: none; stroke: var(--power-color); stroke-width: 3; stroke-dasharray: var(--power-dash); stroke-linecap: round; }
.power-curve { fill: none; stroke: var(--power-color); stroke-width: 2.5; stroke-dasharray: var(--power-dash); stroke-linecap: round; opacity: .8; }
.power-curve.is-main { stroke-width: 4.5; opacity: 1; }
.power-panel .power-point-controls > label:first-child { flex: 1 1 180px; font-size: 13px; color: var(--ink-700); }
.power-point-controls output { float: right; color: var(--blue-700); font-weight: 700; }
.power-point-controls input { display: block; width: 100%; padding: 0; margin-top: 10px; accent-color: var(--blue-600); }
.power-properties { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 14px; }
.power-properties p { margin: 0; padding: 12px; background: var(--blue-50); border-radius: var(--radius-sm); color: var(--ink-700); font-size: 13px; line-height: 1.8; }
.power-properties strong, .power-properties span { display: block; }
.power-properties strong { color: var(--ink-900); font-weight: 600; margin-bottom: 3px; }
.power-value-table { min-width: 540px; }
.power-value-table th:first-child { width: 125px; }
.power-value-table .power-undefined { color: var(--ink-500); font-size: 11px; }
[data-power-point]:focus { outline: none; }
[data-power-point]:focus .linear-point { stroke: var(--ink-900); stroke-width: 4; }
@media (max-width: 620px) { .power-properties { grid-template-columns: 1fr; } .power-comparisons { gap: 12px; } }
.quadratic-equation strong, .quadratic-equation small { overflow-wrap: anywhere; }
.quadratic-equation small { flex: 0 0 100%; font-size: 13px; }
.quadratic-parameters input[type="number"] { padding: 8px 10px; margin-top: 9px; font-size: 15px; }
.quadratic-panel .quadratic-point-controls > label:first-child { flex: 1 1 180px; font-size: 13px; color: var(--ink-700); }
.quadratic-point-controls output { float: right; color: var(--blue-700); font-weight: 700; }
.quadratic-point-controls input { display: block; width: 100%; padding: 0; margin-top: 10px; accent-color: var(--blue-600); }
.quadratic-options { margin-top: 15px; }
.quadratic-curve { fill: none; stroke: var(--blue-700); stroke-width: 4; stroke-linecap: round; }
.quadratic-reference { fill: none; stroke: var(--ink-500); stroke-width: 2.5; stroke-dasharray: 9 7; }
.quadratic-axis { stroke: var(--purple); stroke-width: 2; stroke-dasharray: 7 6; }
.quadratic-vertex { fill: var(--purple); stroke: var(--card); stroke-width: 2; }
.quadratic-root { fill: var(--card); stroke: var(--blue-700); stroke-width: 3; }
.quadratic-vertex-text { fill: var(--purple); font-size: 19px; font-weight: 600; paint-order: stroke; stroke: var(--card); stroke-width: 5px; stroke-linejoin: round; }
.quadratic-properties { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 12px; }
.quadratic-properties p { margin: 0; padding: 12px; background: var(--blue-50); color: var(--ink-700); border-radius: var(--radius-sm); font-size: 13px; line-height: 1.8; }
.quadratic-roots-panel { margin-top: 14px; padding: 14px; border: 1px solid var(--line); border-radius: var(--radius-sm); }
.quadratic-roots-panel h4 { margin: 0 0 8px; font-size: 14px; }
.quadratic-roots-panel p { margin: 6px 0 0; font-size: 13px; line-height: 1.8; overflow-wrap: anywhere; }
.quadratic-error { color: var(--ink-900); border-left: 3px solid var(--amber); background: var(--blue-50); padding: 10px 12px; font-size: 13px; }
.quadratic-value-table { min-width: 440px; }
.quadratic-value-table button { overflow-wrap: anywhere; }
[data-quadratic-point]:focus { outline: none; }
[data-quadratic-point]:focus .linear-point { stroke: var(--ink-900); stroke-width: 4; }
@media (max-width: 620px) {
  .quadratic-properties { grid-template-columns: 1fr; gap: 8px; }
  .quadratic-vertex-text { font-size: 26px; }
  .quadratic-equation strong { font-size: 24px; }
}
.linear-panel [hidden] { display: none !important; }
.linear-parameters.inverse-parameters { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.inverse-curve { fill: none; stroke: var(--blue-700); stroke-width: 4; stroke-linecap: round; }
.inverse-product { fill: color-mix(in srgb, var(--amber) 16%, transparent); stroke: var(--amber); stroke-width: 2; }
.inverse-area-text { fill: var(--ink-900); font-size: 21px; text-anchor: middle; paint-order: stroke; stroke: var(--card); stroke-width: 4px; }
.inverse-value-table { min-width: 440px; }
.inverse-value-table .inverse-undefined { color: var(--ink-500); background: var(--line-soft); font-size: 11px; }
.inverse-panel .area-shapes > span { font-size: 12px; color: var(--ink-500); margin-right: 4px; }
.inverse-value-table button:disabled { color: var(--ink-500); cursor: default; }
[data-inverse-point]:focus { outline: none; }
[data-inverse-point]:focus .linear-point { stroke: var(--ink-900); stroke-width: 4; }
.linear-toolbar { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; margin-top: 14px; }
.linear-equation-card { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; margin: 16px 0; padding: 15px 18px; border-radius: var(--radius-sm); background: var(--blue-50); color: var(--blue-800); }
.linear-equation-card > span { font-size: 12px; }
.linear-equation-card strong { font-size: 29px; font-weight: 650; font-variant-numeric: tabular-nums; }
.linear-parameters { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.linear-parameters label { color: var(--ink-700); font-size: 13px; min-width: 0; }
.linear-parameters output { float: right; color: var(--blue-700); font-weight: 700; }
.linear-parameters input { width: 100%; margin-top: 12px; padding: 0; accent-color: var(--blue-600); }
.linear-parameters input:disabled { opacity: .45; }
.linear-parameters small { display: block; color: var(--ink-500); font-size: 11px; margin-top: 3px; }
.linear-presets { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.linear-presets > span { color: var(--ink-500); font-size: 12px; margin-right: 3px; }
.linear-window { display: flex; align-items: center; gap: 8px; color: var(--ink-700); font-size: 12px; white-space: nowrap; }
.linear-window select { padding: 5px 8px; }
.linear-rate-toolbar > label { display: flex; align-items: center; gap: 6px; color: var(--ink-700); font-size: 12px; }
.linear-rate-toolbar input { accent-color: var(--blue-600); }
.linear-domain { margin: 12px 0 0; color: var(--ink-500); font-size: 12px; line-height: 1.8; }
.linear-model-svg { min-height: 0 !important; aspect-ratio: 76 / 65; }
.linear-grid { stroke: var(--line); stroke-width: 1; }
.linear-axis { stroke: var(--ink-700); stroke-width: 2; }
.linear-axis-arrow { fill: var(--ink-700); }
.linear-tick { stroke: var(--ink-500); stroke-width: 1.5; }
.linear-tick-text { fill: var(--ink-500); font-size: 17px; }
.linear-axis-label { fill: var(--ink-700); font-size: 21px; }
.linear-curve { stroke: var(--blue-700); stroke-width: 4; stroke-linecap: round; }
.linear-data-point { fill: var(--blue-700); }
.linear-intercept { fill: var(--purple); stroke: var(--card); stroke-width: 2; }
.linear-projection { stroke: var(--amber); stroke-width: 2; stroke-dasharray: 6 5; }
.linear-rate { stroke: var(--purple); stroke-width: 3; }
.linear-rate-text { fill: var(--purple); font-size: 18px; }
.linear-point-hit { fill: transparent; cursor: grab; }
.linear-point { fill: var(--amber); stroke: var(--card); stroke-width: 3; cursor: grab; }
[data-linear-point]:focus { outline: none; }
[data-linear-point]:focus .linear-point { stroke: var(--ink-900); stroke-width: 4; }
.linear-point-text { fill: var(--ink-900); font-size: 19px; font-weight: 600; }
.linear-point-text, .linear-rate-text { paint-order: stroke; stroke: var(--card); stroke-width: 5px; stroke-linejoin: round; }
.linear-reading { line-height: 1.9; }
.linear-explanation { margin-top: 12px; font-size: 13px; color: var(--ink-700); line-height: 1.9; }
.linear-table-head { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 6px; margin: 18px 0 8px; }
.linear-table-head h4 { margin: 0; color: var(--ink-900); font-size: 14px; }
.linear-table-head span { color: var(--ink-500); font-size: 11px; }
.linear-table-wrap { width: 100%; overflow-x: auto; }
.linear-value-table { width: 100%; border-collapse: collapse; table-layout: fixed; font-size: 13px; text-align: center; }
.linear-value-table th, .linear-value-table td { border: 1px solid var(--line); padding: 9px 3px; min-width: 0; }
.linear-value-table th { background: var(--blue-50); color: var(--ink-700); font-weight: 600; }
.linear-value-table .is-selected { background: color-mix(in srgb, var(--amber) 16%, var(--card)); font-weight: 700; }
.linear-value-table button { border: 0; border-radius: 4px; background: transparent; color: var(--blue-800); font: inherit; cursor: pointer; min-height: 28px; padding: 2px 4px; }
.linear-value-table button:focus-visible { outline: 2px solid var(--blue-700); }
.linear-value-table caption { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
.math-models-page.is-presentation .linear-model-svg { max-height: 65vh; }
@media (max-width: 620px) {
  .linear-parameters { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
  .linear-parameters label:last-child { grid-column: 1 / -1; }
  .inverse-parameters label:last-child { grid-column: auto; }
  .linear-equation-card { gap: 9px; padding: 12px; }
  .linear-equation-card strong { order: -1; flex: 0 0 100%; text-align: center; font-size: 27px; }
  .linear-presets > span { flex: 0 0 100%; }
  .linear-tick-text { font-size: 24px; }
  .linear-axis-label { font-size: 27px; }
  .linear-point-text { font-size: 26px; }
  .linear-rate-text { font-size: 24px; }
  .linear-point-hit { r: 50px; }
  .linear-reading { font-size: 12px; }
  .linear-value-table { font-size: 12px; }
}
@media print { .linear-parameters, .linear-toolbar, .linear-panel .math-model-canvas-head button { display: none !important; } }
.math-models-page { padding-bottom: 12px; }
.math-models-page:fullscreen { box-sizing: border-box; width: 100%; height: 100%; max-width: none; overflow-y: auto; padding: 24px; background: var(--bg); }
.math-models-head { align-items: flex-end; }
.math-models-layout { display: grid; grid-template-columns: 255px minmax(0, 1fr); gap: 18px; align-items: start; }
.math-model-workbench { min-width: 0; }
.math-models-catalog, .math-model-workbench > section { border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); box-shadow: var(--shadow); }
.math-models-catalog { position: sticky; top: 78px; overflow: hidden; }
.math-models-catalog-head { padding: 17px 17px 13px; border-bottom: 1px solid var(--line-soft); }
.math-models-catalog-head h2 { margin: 4px 0 5px; font-size: 16px; }
.math-models-catalog-head p { margin: 0; color: var(--ink-500); font-size: 12px; line-height: 1.55; }
.math-model-group { padding: 13px 10px 4px; }
.math-model-group h3 { margin: 0 7px 7px; color: var(--ink-500); font-size: 11.5px; font-weight: 600; letter-spacing: .04em; }
.math-model-entry { display: flex; align-items: flex-start; gap: 9px; margin: 2px 0; padding: 9px 8px; border-radius: var(--radius-sm); color: var(--ink-700); text-decoration: none; }
.math-model-entry:hover { background: var(--blue-50); color: var(--ink-900); text-decoration: none; }
.math-model-entry.is-active { background: var(--blue-100); color: var(--blue-800); }
.math-model-entry.is-planned { color: var(--ink-400); }
.math-model-entry-icon { display: grid; place-items: center; width: 27px; height: 27px; flex: 0 0 27px; border-radius: 7px; background: var(--blue-50); color: var(--blue-700); font-size: 15px; font-weight: 600; }
.math-model-entry.is-active .math-model-entry-icon { background: var(--card); }
.math-model-entry.is-planned .math-model-entry-icon { background: var(--line-soft); color: var(--ink-400); }
.math-model-entry b, .math-model-entry small, .math-model-entry em { display: block; }
.math-model-entry b { font-size: 12.5px; font-weight: 600; line-height: 1.45; }
.math-model-entry small { margin-top: 2px; color: var(--ink-500); font-size: 11px; line-height: 1.45; }
.math-model-entry em { margin-top: 3px; color: var(--amber); font-size: 10.5px; font-style: normal; }
.math-model-intro { display: flex; justify-content: space-between; gap: 15px; padding: 18px 20px; }
.math-model-intro h2 { margin: 4px 0 5px; font-size: 20px; }
.math-model-intro p { margin: 0; color: var(--ink-500); font-size: 13px; }
.math-model-tags { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 5px; align-content: flex-start; }
.math-model-panel { margin-top: 14px; padding: 16px 20px; }
.math-model-panel-head, .math-model-canvas-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.math-model-panel-head h3, .math-model-canvas-head h3 { margin: 3px 0 0; font-size: 15px; }
.math-model-form-grid { display: grid; grid-template-columns: repeat(3, minmax(100px, 1fr)) minmax(100px, 1fr) minmax(100px, 1fr) auto; gap: 10px; align-items: end; margin-top: 13px; }
.math-model-form-grid .form-row { margin: 0; }
.math-model-form-grid .form-row > span { display: block; margin-bottom: 5px; color: var(--ink-700); font-size: 12px; font-weight: 600; }
.math-model-form-grid input, .math-model-form-grid select { width: 100%; }
.math-model-apply { align-self: end; }
.math-model-panel .form-hint { margin: 9px 0 0; color: var(--ink-400); font-size: 11.5px; }
.math-model-canvas-panel { margin-top: 14px; padding: 18px 20px 20px; }
.math-model-canvas-head { align-items: flex-end; padding-bottom: 10px; border-bottom: 1px solid var(--line-soft); }
.math-model-canvas-head p { margin: 3px 0 0; color: var(--ink-400); font-size: 11.5px; }
.math-model-status { color: var(--blue-700); font-size: 12px; font-variant-numeric: tabular-nums; }
.math-model-svg-wrap { width: 100%; margin-top: 5px; overflow: hidden; }
.math-model-svg { display: block; width: 100%; min-height: 315px; overflow: visible; touch-action: none; }
.math-model-svg .axis { stroke: var(--ink-700); stroke-width: 2.5; stroke-linecap: round; }
.math-model-svg .axis-arrow { fill: var(--ink-700); }
.math-model-svg .tick { stroke: var(--ink-400); stroke-width: 1.2; }
.math-model-svg .tick.major { stroke: var(--ink-700); stroke-width: 1.8; }
.math-model-svg .tick-label { fill: var(--ink-500); font-size: 14px; text-anchor: middle; }
.math-model-svg .point-a, .math-model-svg .point-b { stroke: var(--card); stroke-width: 3; cursor: grab; }
.math-model-svg .point-a { fill: var(--blue-600); }
.math-model-svg .point-b { fill: var(--amber); }
.math-model-svg .point-a:focus, .math-model-svg .point-b:focus { outline: none; stroke: var(--ink-900); stroke-width: 4; }
.math-model-svg .point-label { fill: var(--ink-900); font-size: 16px; font-weight: 700; text-anchor: middle; }
.math-model-svg .point-value { fill: var(--ink-500); font-size: 13px; text-anchor: middle; }
.math-model-svg .distance-line { stroke: var(--purple); stroke-width: 3; stroke-dasharray: 7 5; }
.math-model-svg .distance-label { fill: var(--purple); font-size: 14px; font-weight: 600; text-anchor: middle; }
.geometry-model-svg { min-height: 390px; }
.geometry-model-svg .triangle-shape { fill: var(--blue-100); fill-opacity: .78; stroke: var(--blue-700); stroke-width: 3; stroke-linejoin: round; }
.geometry-model-svg .triangle-vertex { fill: var(--amber); stroke: var(--card); stroke-width: 3; cursor: grab; }
.geometry-model-svg .triangle-vertex:focus { outline: none; stroke: var(--ink-900); stroke-width: 4; }
.geometry-model-svg .triangle-label { fill: var(--ink-900); font-size: 17px; font-weight: 700; text-anchor: middle; }
.geometry-model-svg .triangle-angle-arc { fill: none; stroke: var(--purple); stroke-width: 3; }
.geometry-model-svg .triangle-angle-text { fill: var(--purple); font-size: 14px; font-weight: 600; text-anchor: middle; }
.math-model-geometry-hint { margin-top: 7px; }
.parallel-controls { display: grid; grid-template-columns: 1fr 1fr auto; gap: 22px; align-items: center; margin-top: 15px; }
.parallel-controls .form-row { margin: 0; min-width: 0; }
.parallel-controls .form-row > span { display: flex; justify-content: space-between; align-items: center; color: var(--ink-700); font-size: 13px; }
.parallel-controls output { color: var(--blue-700); font-weight: 700; font-variant-numeric: tabular-nums; }
.parallel-controls small { color: var(--ink-500); }
.parallel-controls input[type="range"] { width: 100%; margin: 13px 0 0; padding: 0; accent-color: var(--blue-600); cursor: pointer; }
.parallel-measures { display: flex; align-items: center; gap: 7px; font-size: 13px; white-space: nowrap; cursor: pointer; }
.parallel-measures input { accent-color: var(--blue-600); }
.parallel-toolbar { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; padding: 14px 0 5px; }
.parallel-relations { display: flex; flex-wrap: wrap; gap: 6px; }
.parallel-relations button[aria-pressed="true"] { background: var(--blue-100); color: var(--blue-800); border-color: var(--blue-600); }
.parallel-pair-label { display: flex; align-items: center; gap: 8px; color: var(--ink-500); font-size: 12px; white-space: nowrap; }
.parallel-pair-label select { min-width: 130px; padding: 6px 9px; }
.parallel-model-svg { min-height: 0; aspect-ratio: 5 / 3; }
.parallel-line { stroke: var(--ink-700); stroke-width: 3; stroke-linecap: round; }
.parallel-mark { fill: none; stroke: var(--ink-700); stroke-width: 2; }
.parallel-transversal { stroke: var(--purple); stroke-width: 3; stroke-linecap: round; }
.parallel-condition { fill: var(--ink-700); font-size: 18px; font-weight: 600; }
.parallel-line-label { fill: var(--ink-700); font-size: 23px; font-style: italic; }
.parallel-point-label { fill: var(--ink-500); font-size: 15px; font-weight: 600; }
.parallel-sector { fill: var(--line-soft); stroke: var(--ink-400); stroke-width: 1; }
.parallel-sector.parallel-color-0 { fill: var(--blue-100); stroke: var(--blue-700); stroke-width: 2; }
.parallel-sector.parallel-color-1 { fill: var(--amber); fill-opacity: .18; stroke: var(--amber); stroke-width: 2; }
.parallel-angle-label { fill: var(--ink-500); text-anchor: middle; font-size: 18px; }
.parallel-angle-label.parallel-color-0 { fill: var(--blue-800); font-weight: 700; }
.parallel-angle-label.parallel-color-1 { fill: var(--ink-900); font-weight: 700; }
.parallel-angle-value { font-size: 16px; }
.parallel-handle { fill: var(--blue-600); stroke: var(--card); stroke-width: 3; cursor: ew-resize; }
.parallel-handle.is-rotate { fill: var(--purple); cursor: grab; }
.parallel-handle-hit { fill: transparent; cursor: grab; }
.parallel-handle-control:focus { outline: none; }
.parallel-handle-control:focus .parallel-handle { stroke: var(--ink-900); stroke-width: 4; }
.parallel-handle-label { fill: var(--purple); font-size: 15px; text-anchor: middle; }
.parallel-reading .parallel-color-0::before, .parallel-reading .parallel-color-1::before { content: ''; display: inline-block; width: 9px; height: 9px; margin-right: 7px; border-radius: 50%; background: var(--blue-600); }
.parallel-reading .parallel-color-1::before { background: var(--amber); }
.parallel-theorem { margin: 12px 0 0; text-align: center; color: var(--ink-700); font-size: 14px; font-weight: 600; }
.area-controls { display: grid; grid-template-columns: 1fr 1fr 130px; align-items: end; gap: 15px 22px; margin-top: 15px; }
.area-controls .form-row { min-width: 0; margin: 0; }
.area-controls .form-row > span { display: flex; justify-content: space-between; margin-bottom: 6px; color: var(--ink-700); font-size: 13px; }
.area-controls b { font-weight: 600; }
.area-controls output { color: var(--blue-700); font-weight: 700; font-variant-numeric: tabular-nums; }
.area-controls input[type="range"] { width: 100%; margin: 7px 0 0; padding: 0; accent-color: var(--blue-600); cursor: pointer; }
.area-controls select { width: 100%; }
.area-apex-control { grid-column: 1 / 3; }
.area-toolbar { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; padding: 14px 0 10px; }
.area-shapes { display: flex; flex-wrap: wrap; gap: 6px; }
.area-learning-path { margin: 0 0 9px; color: var(--ink-500); font-size: 12px; }
.area-bridge { display: block; margin: 14px auto 0; }
.area-bridge[hidden] { display: none; }
.area-bridge[href] { width: fit-content; }
.circle-controls { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 18px; margin-top: 15px; }
.circle-controls label { min-width: 0; color: var(--ink-700); font-size: 13px; }
.circle-controls select, .circle-controls input { display: block; width: 100%; margin-top: 9px; }
.circle-controls input { padding: 0; accent-color: var(--blue-600); }
.circle-controls output { float: right; color: var(--blue-700); font-weight: 700; }
.circle-show { display: flex; gap: 6px; align-items: center; color: var(--ink-700); font-size: 12px; }
.circle-show input { accent-color: var(--blue-600); }
.circle-parts { display: flex; align-items: center; flex-wrap: wrap; gap: 8px 14px; margin-bottom: 12px; color: var(--ink-700); font-size: 12px; }
.circle-model-svg { min-height: 0; aspect-ratio: 45 / 28; }
.circle-piece { stroke-width: .025; stroke-linejoin: round; }
.circle-piece-a { fill: var(--blue-100); stroke: var(--blue-700); }
.circle-piece-b { fill: var(--amber); fill-opacity: .3; stroke: var(--amber); }
.circle-limit-note { margin: 14px 0 0; border-left: 3px solid var(--purple); padding: 8px 12px; background: var(--blue-50); color: var(--ink-700); font-size: 12px; line-height: 1.8; }
.area-cut-line { stroke: var(--purple); stroke-width: 3; stroke-dasharray: 8 5; }
.area-motion-arrow { stroke: var(--amber); stroke-width: 3; fill: none; }
.area-shapes button[aria-pressed="true"] { background: var(--blue-100); color: var(--blue-800); border-color: var(--blue-600); }
.area-display-options { display: flex; flex-wrap: wrap; gap: 9px 14px; }
.area-display-options label { display: flex; align-items: center; gap: 5px; color: var(--ink-700); font-size: 12px; cursor: pointer; }
.area-display-options input { accent-color: var(--blue-600); }
.area-proof-view { margin: 3px 0 9px; }
.area-proof-controls { display: flex; align-items: center; gap: 16px; padding: 10px 12px; border-radius: var(--radius-sm); background: var(--blue-50); }
.area-proof-controls label { display: flex; align-items: center; gap: 10px; flex: 1; font-size: 12px; color: var(--ink-700); }
.area-proof-controls input { min-width: 50px; flex: 1; padding: 0; accent-color: var(--blue-600); }
.area-proof-controls output { min-width: 34px; text-align: right; font-variant-numeric: tabular-nums; }
.area-controls [hidden], .area-display-options [hidden], .area-proof-controls[hidden], .area-proof-view[hidden] { display: none; }
.area-model-svg { min-height: 0; aspect-ratio: 45 / 28; }
.area-original { fill: var(--blue-100); fill-opacity: .85; stroke: var(--blue-700); stroke-width: 3; stroke-linejoin: round; }
.area-copy { fill: var(--amber); fill-opacity: .28; stroke: var(--amber); stroke-width: 3; stroke-linejoin: round; pointer-events: none; }
.area-grid-line { stroke: var(--ink-400); stroke-width: 1; }
.area-grid-overlay { stroke: none; }
.area-grid-background { opacity: .35; }
.area-base { stroke: var(--blue-700); stroke-width: 4; }
.area-top-base { stroke: var(--amber); stroke-width: 4; }
.area-altitude { stroke: var(--purple); stroke-width: 3; stroke-dasharray: 7 5; }
.area-extension { stroke: var(--ink-500); stroke-width: 2; stroke-dasharray: 7 5; }
.area-right-angle { fill: none; stroke: var(--purple); stroke-width: 2; }
.area-point-label { fill: var(--ink-900); font-size: 19px; font-weight: 700; text-anchor: middle; }
.area-foot-label { fill: var(--purple); font-size: 17px; text-anchor: middle; }
.area-dimension { fill: var(--blue-800); font-size: 19px; font-weight: 600; text-anchor: middle; }
.area-height-label { fill: var(--purple); font-size: 18px; font-weight: 600; text-anchor: middle; }
.area-scene-title { fill: var(--ink-900); font-size: 23px; font-weight: 600; text-anchor: middle; }
.area-scene-subtitle { fill: var(--ink-500); font-size: 18px; text-anchor: middle; }
.area-handle-hit { fill: transparent; cursor: grab; }
.area-handle { fill: var(--amber); stroke: var(--card); stroke-width: 3; cursor: grab; }
.area-handle.is-base { fill: var(--blue-600); }
.area-handle-control:focus { outline: none; }
.area-handle-control:focus .area-handle { stroke: var(--ink-900); stroke-width: 4; }
.area-proof-outline { fill: none; stroke: var(--ink-700); stroke-width: 2; stroke-dasharray: 8 5; pointer-events: none; }
.area-midpoint { fill: var(--purple); }
.area-reading { font-weight: 600; text-align: center; line-height: 1.8; font-variant-numeric: tabular-nums; }
.area-explanation { margin: 12px 0 0; color: var(--ink-700); text-align: center; font-size: 13px; line-height: 1.8; }
.math-model-reading { display: flex; flex-wrap: wrap; justify-content: center; gap: 9px 20px; margin-top: 4px; padding: 11px 13px; border-radius: var(--radius-sm); background: var(--blue-50); color: var(--ink-700); font-size: 13px; }
.math-model-reading strong { color: var(--blue-800); }
.math-model-reading .reading-b { color: var(--amber); }
.math-model-empty { min-height: 360px; display: grid; place-items: center; align-content: center; text-align: center; }
.math-model-empty-icon { color: var(--blue-500); font-size: 42px; line-height: 1; }
.math-model-empty h2 { margin: 13px 0 5px; font-size: 18px; }
.math-model-empty p { margin-bottom: 15px; color: var(--ink-500); }
.math-model-teaching-note { display: flex; align-items: flex-start; gap: 18px; margin-top: 14px; padding: 16px 20px; background: var(--blue-50) !important; box-shadow: none !important; }
.math-model-teaching-note h3 { margin: 3px 0 0; font-size: 15px; white-space: nowrap; }
.math-model-teaching-note p { margin: 3px 0 0; color: var(--ink-500); font-size: 12.5px; }
.math-models-page.is-presentation .math-models-catalog { display: none; }
.math-models-page.is-presentation .math-models-layout { display: block; }
.math-models-page.is-presentation .math-model-intro { padding-top: 6px; }
.math-models-page.is-presentation .math-model-controls, .math-models-page.is-presentation .math-model-teaching-note { display: none; }
.math-models-page.is-presentation .math-model-canvas-panel { margin-top: 0; }
.math-models-page.is-presentation .math-model-svg { min-height: 500px; }
.math-models-page.is-presentation .parallel-model-svg { min-height: 0; max-height: 70vh; }
.math-models-page.is-presentation .area-model-svg { min-height: 0; max-height: 65vh; }
.math-models-page.is-presentation .circle-model-svg { min-height: 0; max-height: 65vh; }
@media (max-width: 900px) {
  .math-models-layout { grid-template-columns: 1fr; }
  .math-models-catalog { position: static; display: flex; flex-wrap: wrap; }
  .math-models-catalog-head { width: 100%; }
  .math-model-group { width: 33.333%; }
  .math-model-form-grid { grid-template-columns: repeat(3, minmax(95px, 1fr)); }
  .math-model-apply { width: 100%; }
}
@media (max-width: 620px) {
  .math-model-intro { display: block; }
  .math-model-tags { justify-content: flex-start; margin-top: 10px; }
  .math-models-catalog { display: flex; flex-wrap: wrap; }
  .math-models-catalog-head { width: 100%; }
  .math-model-group { width: 100%; padding-top: 8px; }
  .math-model-group:not(:first-of-type) { border-top: 1px solid var(--line-soft); }
  .math-model-entry { display: inline-flex; width: 100%; }
  .math-model-form-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .math-model-form-grid .math-model-apply { grid-column: 1 / -1; }
  .math-model-canvas-panel, .math-model-panel { padding-left: 13px; padding-right: 13px; }
  .math-model-svg { min-height: 250px; }
  .geometry-model-svg { min-height: 300px; }
  .math-model-canvas-head { align-items: flex-start; flex-direction: column; }
  .math-model-status { align-self: flex-start; }
  .parallel-controls { grid-template-columns: 1fr; gap: 14px; }
  .parallel-model-svg { min-height: 0; }
  .parallel-angle-label { font-size: 30px; }
  .parallel-angle-value { font-size: 26px; }
  .parallel-condition, .parallel-handle-label { font-size: 28px; }
  .parallel-line-label { font-size: 32px; }
  .parallel-point-label { font-size: 24px; }
  .parallel-handle-hit { r: 55px; }
  .parallel-toolbar { gap: 10px; }
  .area-controls { grid-template-columns: 1fr 1fr; gap: 15px; }
  .circle-controls { grid-template-columns: 1fr 1fr; }
  .circle-model-svg { min-height: 0; }
  .circle-model-svg .area-scene-title { font-size: 34px; }
  .circle-model-svg .area-scene-subtitle { font-size: 29px; }
  .circle-model-svg .area-dimension, .circle-model-svg .area-height-label { font-size: 32px; }
  .area-apex-control { grid-column: 1 / -1; }
  .area-unit-label { grid-column: 1 / -1; }
  .area-model-svg { min-height: 0; }
  .area-scene-title { font-size: 28px; }
  .area-scene-subtitle { font-size: 25px; }
  .area-dimension, .area-height-label, .area-point-label { font-size: 29px; }
  .area-foot-label { font-size: 26px; }
  .area-model-svg.is-parallelogram .area-scene-title { font-size: 34px; }
  .area-model-svg.is-parallelogram .area-scene-subtitle { font-size: 30px; }
  .area-model-svg.is-parallelogram .area-dimension, .area-model-svg.is-parallelogram .area-height-label { font-size: 34px; }
  .area-handle-hit { r: 55px; }
  .area-proof-controls { flex-wrap: wrap; gap: 10px; }
  .area-proof-controls label { flex-basis: 100%; }
  .math-model-teaching-note { display: block; }
  .math-model-teaching-note h3 { margin: 4px 0 8px; }
}
@media print {
  .math-models-catalog, .math-models-head, .math-model-controls, .math-model-teaching-note { display: none !important; }
  .math-models-layout { display: block; }
  .math-model-intro, .math-model-canvas-panel { box-shadow: none !important; border: 0 !important; }
}