:root{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang TC,Microsoft JhengHei,sans-serif;color:var(--navy);background:var(--mist);color-scheme:light;font-synthesis:none;--navy: #142f3d;--teal: #087e83;--mist: #f2f6f5;--muted: #536d76;--amber: #a36010;--line: #dce5e5;--control-line: #6b858d}*{box-sizing:border-box}body{margin:0;font-size:1rem;line-height:1.6}button,input,select{font:inherit;color:inherit}a{color:inherit;text-underline-offset:3px}button,a{touch-action:manipulation}button,summary{cursor:pointer}button,input,select,summary,a{-webkit-tap-highlight-color:transparent}button,select,input[type=search]{min-height:44px;border:1px solid var(--control-line);border-radius:10px;background:#fff}button{min-width:44px;padding:8px 12px;font-size:.875rem;font-weight:600;line-height:1.5}button,a,summary,input,select{transition:color .15s,background-color .15s,border-color .15s,opacity .15s}button:hover,select:hover{border-color:var(--teal);background-color:var(--mist)}button:active,a:active,summary:active,input:active,select:active{opacity:.75}a:hover,summary:hover{color:var(--teal)}input:hover{border-color:var(--teal)}:where(button,a,input,select,summary):focus-visible{outline:3px solid var(--amber);outline-offset:3px}h1,h2,h3,p{margin:0}h1,h2,h3{font-weight:600;line-height:1.4;overflow-wrap:anywhere}h1{font-size:clamp(1.625rem,2.5vw,2rem)}h2{font-size:1.5rem}h3{font-size:1.125rem}p{max-width:78ch}:where(div,section,aside,span,nav,label){min-width:0}.section-wrap{width:100%;max-width:1280px;padding-inline:32px;margin-inline:auto}.site-header{min-height:72px;max-width:1280px;margin-inline:auto;padding:12px 32px;display:flex;align-items:center;gap:24px}.brand{display:inline-flex;min-height:44px;align-items:center;gap:12px;font-weight:600;text-decoration:none;line-height:1.4}.brand svg{width:36px;height:36px;flex-shrink:0;color:var(--teal)}.brand small{display:block;color:var(--muted);font-size:.8125rem;font-weight:400;line-height:1.6}.site-header nav{display:flex;flex:1;align-items:center;justify-content:flex-end;gap:16px;font-size:.875rem}.site-header nav a,.header-actions a{display:inline-flex;align-items:center;min-height:44px;text-decoration:none}.header-actions{display:flex;align-items:center;gap:8px;font-size:.875rem}.locale-button{white-space:nowrap}.skip-link{position:absolute;top:8px;left:16px;z-index:10;padding:12px;background:#fff;transform:translateY(-150%)}.skip-link:focus{transform:none}.lab-intro{padding-block:16px}.lab-intro p{margin-top:8px;color:var(--muted);font-size:.875rem}.lab-section{padding-bottom:32px}.lab-shell{border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:0 8px 28px #142f3d0a}.recommended-scenes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;padding:16px 16px 0}.recommended-scenes button{white-space:normal;overflow-wrap:anywhere}.recommended-scenes button[aria-pressed=true],.filters button[aria-pressed=true]{color:var(--navy);background:#e3f2ef;border-color:var(--teal)}.scene-choices{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:16px;padding:12px 16px}.scene-choices label{display:block;margin-bottom:4px;font-size:.875rem;font-weight:600;line-height:1.5}.scene-choices select{width:100%;min-width:0;padding:8px 32px 8px 12px;font-size:.875rem;line-height:1.5}.inspector-title{display:flex;align-items:flex-start;gap:12px;padding:12px 16px;border-block:1px solid var(--line)}.inspector-title h3{flex:1;font-size:1.125rem}.inspector-id{color:var(--muted);font-size:.875rem;font-variant-numeric:tabular-nums}.panel-body{display:grid;grid-template-columns:minmax(0,1fr) 320px}.viewport{background:#f7faf9}.viewport-top{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;padding:12px 16px 4px;font-size:.8125rem;color:var(--muted)}.mock-badge{display:inline-flex;align-items:center;gap:8px}.mock-badge i{width:8px;height:8px;background:var(--teal);border-radius:50%}.frame-label{font-variant-numeric:tabular-nums}.simulation{display:block;width:100%;height:auto;max-height:380px}.scene-label{font:12px sans-serif;fill:#536d76}.zone-label{font:11px sans-serif;fill:#08777a}.actor-label{font:600 9px sans-serif;fill:#fff}.analysis-zone{stroke:#087e83;stroke-width:1.5;stroke-dasharray:6 4;fill:#7ac7bb;fill-opacity:.13}.zone-alert{stroke:#a36010;fill:#e5ad4d;fill-opacity:.18}.zone-off{stroke:#6b858d!important;stroke-dasharray:5 5;fill:#dde5e5!important;fill-opacity:.4}.zone-off~.zone-label{fill:#536d76}.detection{stroke:#087e83;stroke-width:1;fill:#36b2a8;fill-opacity:.04}.vehicle-box{stroke:#a36010;fill:#d5a64e;fill-opacity:.06}.bay{stroke-width:1.4}.occupied{stroke:#6b858d;fill:#e1e9e9}.free{stroke:#087e83;fill:#d6eee7}.bay-label{fill:#536d76;font:10px sans-serif}.viewport-bottom{padding:8px 16px;display:flex;flex-direction:column;gap:8px}.viewport-bottom>span{font-size:.8125rem;color:var(--muted)}.playback{display:flex;flex-wrap:wrap;gap:8px}.playback button{display:inline-flex;align-items:center;justify-content:center;gap:8px}.playback .play-button{background:var(--teal);color:#fff;border-color:var(--teal)}.playback .play-button:hover{background:#06666b;border-color:#06666b}.frame-control{padding:0 16px 12px}.frame-control label,.threshold-control label{display:flex;justify-content:space-between;gap:8px;font-size:.875rem;font-weight:600}output{font-variant-numeric:tabular-nums}input[type=range]{display:block;width:100%;min-width:0;height:44px;margin:0;accent-color:var(--teal);cursor:pointer}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:24px;height:24px;border-radius:50%;background:var(--teal);border:1px solid var(--teal)}input[type=range]::-webkit-slider-runnable-track{height:6px;border-radius:3px;background:var(--control-line)}input[type=range]{-webkit-appearance:none;-moz-appearance:none;appearance:none;background:transparent}input[type=range]::-webkit-slider-thumb{margin-top:-9px;-webkit-appearance:none}input[type=range]::-moz-range-thumb{width:24px;height:24px;border:1px solid var(--teal);background:var(--teal);border-radius:50%}input[type=range]::-moz-range-track{height:6px;background:var(--control-line)}.crossing-history{display:flex;flex-wrap:wrap;gap:8px;padding:0 16px 16px;font-size:.8125rem;font-variant-numeric:tabular-nums}.inspector{padding:16px;border-left:1px solid var(--line)}.reading>span,.secondary-reading>span{color:var(--muted);font-size:.875rem}.reading strong{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px;font-size:2.75rem;font-weight:600;line-height:1.25;font-variant-numeric:tabular-nums}.reading small,.secondary-reading small{font-size:.875rem;font-weight:400;overflow-wrap:anywhere}.secondary-reading{margin-top:8px}.secondary-reading strong{display:block;font-size:1.5rem;font-weight:600;font-variant-numeric:tabular-nums}.threshold-control{margin-top:16px}.threshold-control p{font-size:.8125rem;color:var(--muted)}.zone-switch{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:44px;margin-top:8px;font-size:.875rem;font-weight:600;cursor:pointer}.zone-switch input{width:44px;height:44px;margin:0;accent-color:var(--teal);flex-shrink:0;cursor:pointer}.status{display:flex;align-items:flex-start;gap:8px;padding-block:12px;font-size:.875rem}.status>span{width:24px;text-align:center;font-weight:600}.status strong{font-weight:600}.status-alert{color:var(--amber)}.rule-explanation{border-top:1px solid var(--line);font-size:.875rem}.rule-explanation summary{min-height:44px;padding-block:12px;font-weight:600}.rule-explanation p{padding-bottom:12px;color:var(--muted)}.simulation-note{font-size:.8125rem;line-height:1.6;color:var(--muted)}.safety-limit{padding-block:12px;border-top:1px solid var(--line)}.details-link{width:100%;text-align:left}.legend{display:flex;flex-wrap:wrap;gap:8px 24px;padding:12px 16px;border-top:1px solid var(--line);font-size:.8125rem;color:var(--muted)}.legend>span{display:inline-flex;align-items:center;gap:8px}.legend-symbol{width:16px;height:12px;border:2px solid var(--teal);flex-shrink:0}.symbol-1{border-style:dashed}.symbol-2{border-color:var(--amber);border-radius:50%}.legend-disclaimer{margin-left:auto}.section-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;margin-bottom:24px}.section-heading>div{flex:1}.section-heading>p{flex:1;color:var(--muted);font-size:.875rem}.catalog-section,.sources-section{padding-block:32px}.catalog-tools{display:flex;align-items:center;gap:16px;margin-bottom:12px}.search-field{display:flex;align-items:center;flex:1;max-width:640px;gap:8px}.search-field>span{font-size:1.5rem}.search-field input{width:100%;min-width:0;padding:8px 12px}.result-count{color:var(--muted);font-size:.8125rem}.filters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px}.case-list details{border-top:1px solid var(--line);scroll-margin-top:16px}.case-list details:last-child{border-bottom:1px solid var(--line)}.case-list summary{display:flex;align-items:flex-start;gap:16px;padding:16px 8px;min-height:44px;list-style:none}.case-list summary::-webkit-details-marker{display:none}.case-number{color:var(--muted);font-variant-numeric:tabular-nums;font-size:.875rem;padding-top:4px}.case-summary{display:flex;flex-direction:column;gap:4px;flex:1}.case-title{font-weight:600}.case-preview{color:var(--muted);font-size:.875rem}.priority-badge{font-size:.8125rem;color:var(--teal);border:1px solid var(--teal);border-radius:10px;padding:4px 8px}.expand-icon{font-size:1.5rem}.case-list details[open] .expand-icon{transform:rotate(45deg)}.case-content{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;padding:8px 16px 24px}.case-content h3{margin-bottom:8px;font-size:1rem}.case-content p{font-size:.875rem}.case-limitation h3{color:var(--amber)}.case-assumption{grid-column:1 / -1;color:var(--muted);font-size:.8125rem}.empty-state{padding:24px;text-align:center}.empty-state p{margin:0 auto 16px}.technology-section{padding-block:32px;border-block:1px solid var(--line);background:#fff}.technology-disclosure>summary{min-height:44px;padding-block:8px}.technology-disclosure>summary h2{display:inline}.technology-intro{margin-top:16px;color:var(--muted)}.pipeline{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;margin-block:24px}.pipeline>div{position:relative}.stage-tag{display:inline-block;padding:4px 8px;border:1px solid var(--control-line);border-radius:10px;font-size:.8125rem;color:var(--muted);margin-bottom:12px}.stage-tag.native{color:var(--teal);border-color:var(--teal)}.pipeline h3,.technical-facts h3,.rollout-steps h3,.privacy-note h3,.research-limits h3{font-size:1rem;margin-bottom:8px}.pipeline p,.technical-facts p,.rollout-steps p,.privacy-note p,.research-limits p{font-size:.875rem;color:var(--muted)}.pipeline-arrow{display:none}.technical-facts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;padding-block:24px;border-block:1px solid var(--line)}.rollout-heading{margin-top:32px}.rollout-heading p{margin-top:8px;color:var(--muted)}.rollout-steps{list-style:none;padding:0;margin:24px 0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.rollout-steps li{display:flex;gap:12px}.rollout-steps li>span{color:var(--teal);font-weight:600}.privacy-note{display:flex;gap:12px;padding-block:24px;border-top:1px solid var(--line)}.research-limits{padding-top:24px;border-top:1px solid var(--line)}.provenance{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,2fr);gap:32px}.provenance-main>svg{width:40px;height:40px;color:var(--teal);margin-bottom:12px}.provenance-main p{margin-block:12px;color:var(--muted);font-size:.875rem}.provenance-main>a{display:inline-flex;align-items:center;min-height:44px;color:var(--teal);font-size:.875rem}.source-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 24px}.source-links a{display:flex;flex-direction:column;gap:8px;min-height:44px;padding-block:12px;border-top:1px solid var(--line);text-decoration:none}.source-links strong{display:flex;justify-content:space-between;gap:8px;font-size:.875rem;font-weight:600}.source-links a>span{font-size:.8125rem;color:var(--muted)}.closing-disclaimer{max-width:none;padding-top:24px;margin-top:24px;border-top:1px solid var(--line);color:var(--muted);font-size:.8125rem}.site-footer{padding-block:32px;border-top:1px solid var(--line);background:#fff}.site-footer>.section-wrap{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:24px}.site-footer p{margin-top:12px;font-size:.8125rem;color:var(--muted)}.footer-links{display:flex;flex-wrap:wrap;gap:8px 16px;align-items:flex-start}.footer-links a{display:inline-flex;align-items:center;min-height:44px;font-size:.875rem}.footer-note{grid-column:1 / -1}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:1100px){.site-header{flex-wrap:wrap;gap:8px 16px}.site-header nav{flex-basis:100%;justify-content:flex-start}.header-actions{margin-left:auto}.site-header nav{order:3}}@media(max-width:820px){.section-wrap,.site-header{padding-inline:20px}.site-header nav a:not(.gratitude-link){display:none}.scene-choices,.panel-body{grid-template-columns:minmax(0,1fr)}.scene-choices{gap:8px}.inspector{border-left:0;border-top:1px solid var(--line)}.simulation{max-height:none;aspect-ratio:640 / 470}.section-heading{flex-direction:column;gap:12px}.pipeline,.technical-facts,.rollout-steps{grid-template-columns:repeat(2,minmax(0,1fr))}.provenance{grid-template-columns:minmax(0,1fr)}}@media(max-width:620px){.section-wrap{padding-inline:16px}.site-header{padding:8px 16px;gap:8px}.site-header>.brand{flex:1;font-size:.875rem;gap:8px}.site-header .brand svg{width:28px;height:28px}.header-actions .repo-link{display:none}.site-header nav{font-size:.8125rem}.recommended-scenes{padding:12px 12px 0}.recommended-scenes button{padding:8px}.scene-choices,.inspector-title{padding:12px}.catalog-tools{align-items:flex-start;flex-direction:column;gap:8px}.search-field{width:100%}.case-list summary{gap:8px;flex-wrap:wrap}.case-summary{flex-basis:65%}.priority-badge{margin-left:28px}.case-content,.pipeline,.technical-facts,.rollout-steps,.source-links{grid-template-columns:minmax(0,1fr)}.legend-disclaimer{margin-left:0}.site-footer>.section-wrap{grid-template-columns:minmax(0,1fr)}}@media(prefers-contrast:more){:root{--control-line: var(--navy);--line: var(--navy)}}@media(forced-colors:active){:root{--navy: CanvasText;--muted: CanvasText;--mist: Canvas;--teal: Highlight;--amber: CanvasText;--line: CanvasText;--control-line: CanvasText}body,.lab-shell,.viewport,.technology-section,.site-footer,button,select,input[type=search]{background:Canvas;color:CanvasText}.playback .play-button,.recommended-scenes button[aria-pressed=true],.filters button[aria-pressed=true]{background:Highlight;color:HighlightText;border-color:Highlight}.recommended-scenes button[aria-pressed=true],.filters button[aria-pressed=true]{border:3px double Highlight}:where(button,a,input,select,summary):focus-visible{outline-color:Highlight}input[type=range]::-webkit-slider-thumb{background:Highlight;border-color:CanvasText}input[type=range]::-webkit-slider-runnable-track{background:CanvasText}input[type=range]::-moz-range-thumb{background:Highlight;border-color:CanvasText}input[type=range]::-moz-range-track{background:CanvasText}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}