.level-3d-lab{margin:14px 0 24px;color:#244c65;min-width:0}
.l3d-title{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:16px}.l3d-title h3{font-size:22px;line-height:1.35;margin:0 0 7px}.l3d-title p{font-size:13px;color:#607d90;margin:0}.l3d-title>span{font-size:13px;white-space:nowrap;color:#356d91;border-left:3px solid #679aba;padding-left:12px}
.l3d-scenes{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:12px}.level-lab .l3d-scenes button{padding:9px 16px;border:1px solid #ccdae4;background:#f4f8fb;color:#4b6a7d;font-size:13px;border-radius:5px}.level-lab .l3d-scenes button[aria-pressed=true]{background:#285f82;border-color:#285f82;color:#fff}
.l3d-bench{display:grid;grid-template-columns:234px minmax(0,1fr);border:1px solid #cadbe6;border-radius:9px;overflow:hidden;background:#fff}.l3d-settings{padding:20px 17px;background:#f1f6fa;border-right:1px solid #d3e0e8}.l3d-settings h4{font-size:16px;margin:0 0 10px}.l3d-settings p{font-size:12px;line-height:1.8;color:#57778c;margin:0 0 15px}.l3d-settings label{display:block;font-size:12px;margin:17px 0;color:#4d6e83}.l3d-settings select{display:block;width:100%;margin-top:7px;padding:8px;border:1px solid #b8cedd;border-radius:4px;background:white;font:inherit;color:#315d78}.l3d-settings input[type=range]{display:block;width:100%;margin-top:13px;accent-color:#397ca7}.l3d-settings output{float:right;font-weight:600;color:#2e7098}.l3d-settings .l3d-check{display:flex;align-items:flex-start;gap:7px;line-height:1.5}.l3d-check input{accent-color:#397ca7;margin-top:3px}.l3d-settings .l3d-compare-note{font-size:11px;color:#6b8091}.level-lab .l3d-settings button{font-size:12px;width:100%;border-radius:4px;padding:10px;background:white;border:1px solid #aec9da;color:#2c668c}.level-lab .l3d-settings .l3d-probe{background:#e2edf5;border-color:#a2bed2;font-weight:600}.l3d-settings .l3d-hint{padding-top:17px;margin-top:18px;border-top:1px solid #d5e1e9;font-size:11px;line-height:2}
.l3d-stage{min-width:0;background:#fff}.l3d-viewbar{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:10px 12px;background:#f9fbfd}.l3d-viewbar>div{display:flex;gap:4px;flex-wrap:wrap}.level-lab .l3d-viewbar button{padding:7px 10px;border:0;background:transparent;color:#57778b;font-size:12px;border-radius:4px}.level-lab .l3d-viewbar button[aria-pressed=true]{background:#dceaf3;color:#265e83}.l3d-viewbar>span{font-size:11px;color:#6c8596}
.l3d-viewport{height:430px;min-height:340px;position:relative;overflow:hidden;background:#dce7ed}.l3d-viewport>p{position:absolute;inset:0;display:grid;place-content:center;font-size:14px;color:#5a7589}.l3d-viewport canvas{display:block;width:100%;height:100%}.l3d-render-message{font-size:12px;padding:8px 15px;color:#92632e}.l3d-render-message[hidden]{display:none}
.l3d-playbar{display:flex;align-items:center;gap:8px;padding:10px 14px;background:#eff5f9;border-top:1px solid #d5e1e8}.level-lab .l3d-playbar button{padding:7px 11px;background:white;border:1px solid #c8dae6;border-radius:4px;color:#2e668a;font-size:12px;white-space:nowrap}.l3d-playbar input{flex:1;min-width:40px;accent-color:#327aa5}.l3d-playbar output{font-size:12px;white-space:nowrap;color:#58788d;font-variant-numeric:tabular-nums}
.l3d-instruments{display:grid;grid-template-columns:1.2fr 1fr 1fr 1fr;border-top:1px solid #d8e4ec}.l3d-instruments>div{padding:13px 14px;border-right:1px solid #e3ebf0;min-width:0}.l3d-instruments>div:last-child{border-right:0}.l3d-instruments span{display:block;font-size:11px;color:#6d8495}.l3d-instruments strong{display:block;font-size:14px;margin:5px 0;font-weight:600;color:#2c769f}.l3d-instruments strong[data-owner=driver]{color:#936c44}.l3d-instruments b{display:block;font-size:15px;font-weight:600;color:#234b65;font-variant-numeric:tabular-nums}.l3d-instruments small{display:block;font-size:10px;color:#688293;line-height:1.8}.l3d-steer{display:flex;align-items:center;gap:12px}.l3d-steer svg{flex:0 0 48px;width:48px;height:48px;stroke:#327ca6;stroke-width:2.7;fill:none}.l3d-steer g[data-owner=driver]{stroke:#936c44}.l3d-status{font-size:12px;line-height:1.8;padding:11px 15px;background:#eaf3f9;border-top:1px solid #d5e3ec;color:#315f7d;min-height:44px}.l3d-status[data-takeover=true]{background:#fff2df;color:#885e29;border-left:4px solid #be8643}.l3d-actions{display:flex;align-items:center;gap:6px;flex-wrap:wrap;padding:9px 14px}.l3d-actions>span{font-size:11px;color:#6c8595;margin-right:5px}.level-lab .l3d-actions button{padding:7px 10px;border:1px solid #d0dfe9;border-radius:4px;font-size:11px;color:#4d7189;background:#fff}
.l3d-events{display:flex;gap:6px;align-items:center;flex-wrap:wrap;margin-top:12px}.l3d-events>span{font-size:11px;color:#6a8598;margin-right:5px}.level-lab .l3d-events button{display:flex;align-items:center;gap:8px;padding:7px 10px;background:#edf4f9;border:1px solid #d1e0eb;border-radius:4px;font-size:11px;color:#436e89}.l3d-events time{color:#7d94a4;font-variant-numeric:tabular-nums}.l3d-conclusion{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:17px}.l3d-conclusion strong{font-size:14px;font-weight:600}.l3d-conclusion p{margin:5px 0 0;font-size:12px;line-height:1.8;color:#648093;max-width:90ch}.level-lab .l3d-conclusion button{flex:0 0 auto;font-size:12px;padding:9px 12px;color:#336b91;border:1px solid #bed5e5;background:#f2f7fb;border-radius:4px}.l3d-footnote{font-size:10px;color:#7a90a0;line-height:1.8;margin:12px 0 0}.level-legacy-details{margin-top:26px}.level-legacy-details>summary{cursor:pointer;font-size:14px;color:#4e7891;padding:13px 0;border-top:1px solid #cfdee8}.level-legacy-details[open]>summary{margin-bottom:16px}
@media(max-width:1000px){.l3d-bench{grid-template-columns:205px minmax(0,1fr)}.l3d-settings{padding:16px 13px}.l3d-instruments{grid-template-columns:repeat(2,minmax(0,1fr))}.l3d-instruments>div:nth-child(2){border-right:0}.l3d-instruments>div:nth-child(n+3){border-top:1px solid #e3ebf0}.l3d-title h3{font-size:20px}.l3d-viewport{height:400px}.l3d-viewbar>span{display:none}}
@media(max-width:700px){.l3d-bench{display:flex;flex-direction:column}.l3d-stage{order:0}.l3d-settings{order:1;border-right:0;border-top:1px solid #d3e0e8;display:grid;grid-template-columns:1fr 1fr;gap:8px 15px}.l3d-settings h4,.l3d-settings>p:first-of-type{grid-column:1/-1;margin:0}.l3d-settings label{margin:5px 0}.l3d-settings .l3d-probe{grid-column:1/-1}.l3d-settings .l3d-hint{display:none}.l3d-settings .l3d-compare-note{margin:0}.l3d-settings>[data-l3d-inspect]{align-self:start}.l3d-title{align-items:flex-start;gap:8px}.l3d-title h3{font-size:18px}.l3d-title p{font-size:11px;line-height:1.7}.l3d-title>span{font-size:10px;line-height:1.6;padding-left:7px;max-width:70px;white-space:normal;flex:0 0 62px}.l3d-scenes{gap:5px}.level-lab .l3d-scenes button{font-size:11px;padding:8px 11px}.l3d-viewport{height:370px;min-height:320px}.l3d-playbar{flex-wrap:wrap;padding:9px;gap:6px}.l3d-playbar output{font-size:10px}.level-lab .l3d-playbar button{font-size:11px;padding:7px 8px}.l3d-instruments>div{padding:10px 12px}.l3d-steer svg{flex-basis:40px;width:40px;height:40px}.l3d-instruments strong{font-size:13px}.l3d-status{font-size:11px}.l3d-conclusion{display:block}.l3d-conclusion button{margin-top:10px}.l3d-events{gap:5px}.level-lab .l3d-events button{font-size:10px;padding:6px}.l3d-footnote{font-size:10px}}

/* V0.18: teach through one guided action before exposing experiment controls. */
.l3d-title{margin:20px 0 18px}.l3d-title h3{font-size:24px}.l3d-title p{font-size:14px;line-height:1.65}
.l3d-bench{grid-template-columns:280px minmax(0,1fr);border-radius:8px}
.l3d-settings{padding:24px 22px;background:#f5f8fb}
.l3d-mode{display:block;font-size:12px;font-weight:700;color:#627d91;margin-bottom:14px}
.l3d-settings h4{font-size:23px;line-height:1.5;margin:0 0 14px;color:#203f55}
.l3d-settings p{font-size:14px;line-height:1.8;color:#526e83;margin-bottom:16px}
.level-lab .l3d-settings .l3d-primary{background:#285f82;color:white;border-color:#285f82;font-size:16px;line-height:1.4;padding:13px 10px;font-weight:700;min-height:48px}
.level-lab .l3d-settings .l3d-primary:hover{background:#214f6c}
.level-lab .l3d-settings .l3d-skip{border:0;background:transparent;font-size:13px;padding:12px 4px;margin:2px 0 9px;text-decoration:underline;text-underline-offset:4px}
.l3d-watch{border-left:3px solid #92b8d1;padding-left:13px;margin:7px 0 18px}.l3d-watch>b{font-size:14px;color:#244c65}.l3d-watch>p{font-size:13px;margin:6px 0 0}
.l3d-settings .l3d-compare-note{font-size:12px;line-height:1.75;margin:12px 0 20px;color:#5b788d}
.l3d-advanced{border-top:1px solid #d3e0e8;padding-top:14px}.l3d-advanced>summary{cursor:pointer;font-size:13px;line-height:1.6;font-weight:600;color:#365f7b}.l3d-advanced[open]>summary{margin-bottom:17px}.l3d-advanced>p{font-size:12px}.l3d-settings .l3d-field-help{font-size:11px;line-height:1.7;color:#6b8192;margin-top:-8px}.l3d-advanced .l3d-scenes{gap:5px}.level-lab .l3d-advanced .l3d-scenes button{width:auto;flex:1 0 42%;font-size:12px;padding:8px 6px}.level-lab .l3d-advanced .l3d-scenes button[aria-pressed=true]{background:#285f82;color:#fff}
.l3d-moment{display:flex;align-items:flex-start;gap:15px;padding:20px 22px;min-height:119px;background:#fff;border-bottom:1px solid #d9e4ed}
.l3d-moment>span{font-size:11px;padding:6px 8px;margin-top:3px;background:#edf4f9;color:#4c708b;border-radius:3px;white-space:nowrap;flex-shrink:0}
.l3d-moment>span[data-stage=change]{background:#fff0dc;color:#875e2f}.l3d-moment>span[data-stage=result]{background:#e4eff5;color:#285f82}
.l3d-moment strong{font-size:20px;line-height:1.45;color:#203f55;font-weight:700;display:block}
.l3d-moment p{font-size:14px;line-height:1.7;margin:6px 0 0;color:#58748a;max-width:70ch}
.l3d-viewport{height:430px}.l3d-instruments>div{padding:15px 14px}.l3d-instruments span{font-size:12px;color:#547084}.l3d-instruments strong{font-size:17px}.l3d-instruments small{font-size:11px}
.l3d-actions{padding:12px 14px;gap:8px}.l3d-actions>span{font-size:12px}.level-lab .l3d-actions button{padding:9px 12px;font-size:12px}.level-lab .l3d-actions [data-l3d-action=takeover]{background:#e7f1f8;border-color:#aac7db;color:#235c82;font-weight:600}
.l3d-technical{padding:0 15px 12px}.l3d-technical>summary{cursor:pointer;font-size:11px;color:#728a9a}.l3d-technical[open]>summary{margin-bottom:8px}
.l3d-conclusion{background:#f4f8fb;border-left:4px solid #83aac5;padding:18px 20px;align-items:flex-start}.l3d-conclusion span{display:block;font-size:12px;color:#6b879a;margin-bottom:6px}.l3d-conclusion strong{font-size:18px;line-height:1.5}.l3d-conclusion p{font-size:14px;line-height:1.8;max-width:70ch}
@media(max-width:1100px){.l3d-bench{grid-template-columns:250px minmax(0,1fr)}.l3d-settings{padding:20px 18px}.l3d-settings h4{font-size:21px}.l3d-moment{padding:17px;display:block;min-height:145px}.l3d-moment>span{display:inline-block;margin-bottom:7px}.l3d-moment strong{font-size:18px}}
@media(max-width:800px){.l3d-bench{display:flex;flex-direction:column}.l3d-settings{display:block;order:0;border-right:0;border-bottom:1px solid #d3e0e8;border-top:0;padding:20px}.l3d-stage{order:1}.l3d-mode{margin-bottom:8px}.l3d-settings h4{font-size:21px;margin-bottom:8px}.l3d-settings p{font-size:13px;margin-bottom:13px}.l3d-watch{margin:9px 0 12px}.l3d-settings .l3d-compare-note{font-size:12px;margin-bottom:13px}.l3d-advanced{padding-top:12px}.l3d-settings .l3d-field-help{margin-top:0}.l3d-settings label{margin:15px 0}.l3d-instruments{grid-template-columns:1fr 1fr}.l3d-instruments>div:nth-child(2){border-right:0}.l3d-instruments>div:nth-child(n+3){border-top:1px solid #e3ebf0}.l3d-moment{padding:18px;min-height:150px}.l3d-viewport{height:370px}.l3d-viewbar>span{display:none}.l3d-title h3{font-size:21px}.l3d-title p{font-size:13px}.l3d-title>span{display:none}.l3d-conclusion{display:block;padding:16px}.l3d-conclusion strong{font-size:17px}.l3d-conclusion p{font-size:13px}.l3d-conclusion button{margin-top:13px}}
@media(prefers-reduced-motion:reduce){.level-3d-lab *{scroll-behavior:auto}}
.l3d-pairreadout{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:10px 14px;background:#fff;border-top:1px solid #d7e4ed}.l3d-pairreadout[hidden]{display:none}.l3d-pairreadout span{font-size:13px;color:#285f82;background:#edf5fb;padding:6px 10px;border-radius:3px;font-variant-numeric:tabular-nums}.l3d-pairreadout span:nth-child(2){background:#fff4e6;color:#94612c}.l3d-pairreadout small{font-size:11px;color:#708596}.l3d-pairreadout small:before{content:"· ";}