:root{--ink:#173b39;--muted:#6f8381;--green:#086c58;--mint:#c5eadb;--line:#dce6e1;--paper:#f3f6f2;--white:#fff;--dark:#112f30}*{box-sizing:border-box}body{margin:0;background:var(--paper);font:14px -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink)}button,input,select{font:inherit}button,a,input,select,summary{outline-offset:4px}button{cursor:pointer}button:disabled{cursor:wait;opacity:.55}a{color:inherit;text-decoration:none}.masthead{height:82px;border-bottom:1px solid var(--line);background:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 34px}.brand{font-size:29px;font-weight:750;letter-spacing:-1.5px;display:flex;align-items:center;gap:12px}.brand svg{width:31px;height:31px;stroke:var(--green);stroke-width:2;fill:none}.brand span{font-size:10px;letter-spacing:1.6px;font-weight:550;margin-left:22px;padding-left:24px;border-left:1px solid var(--line)}.local{color:var(--muted);font-size:12px;display:flex;gap:8px;align-items:center}.local i,.scene-title i{width:6px;height:6px;display:inline-block;border-radius:50%;background:#39b687}.layout{display:grid;grid-template-columns:300px minmax(0,1fr);min-height:calc(100vh - 82px)}aside{background:#fff;border-right:1px solid var(--line);padding:30px 24px 20px}.eyebrow{font-size:10px;letter-spacing:1.8px;font-weight:700;color:var(--green)}.aside-head h2{font-weight:550;font-size:24px;letter-spacing:-.8px;line-height:1.15;margin:12px 0}.aside-head p{font-size:12px;line-height:1.6;color:var(--muted);margin-bottom:30px}.section-label{display:flex;gap:10px;align-items:center;font-size:10px;color:#8aa39b;letter-spacing:1px;margin:27px 0 12px;font-weight:700}.section-label span{color:var(--ink);font-size:12px;letter-spacing:0}fieldset{border:0;margin:0;padding:0;min-width:0}.objects{display:flex;gap:6px}.object{background:#fff;border:1px solid var(--line);border-radius:8px;flex:1;min-width:0;padding:7px 1px 10px;color:var(--muted);font-size:10px}.object svg{width:65px;max-width:100%;height:35px;stroke:currentColor;fill:none;stroke-width:1.6;display:block;margin:auto}.object.active{background:#e8f4ed;border-color:#4f947e;color:var(--green);font-weight:700}label{display:block;font-size:11px;color:#526a65;line-height:1.8}select,input[type=number]{width:100%;height:38px;border:1px solid var(--line);background:#fff;border-radius:6px;color:var(--ink);padding:6px 10px;min-width:0}input:read-only{background:#f2f5f2;color:#6e7e77}.pair{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:10px 0}.input-unit{position:relative}.input-unit input{padding-right:38px}.input-unit span{position:absolute;right:10px;top:9px;font-size:10px;color:var(--muted)}.force input{font-size:19px;font-weight:600;height:44px}.force span{top:13px}small,.mini{font-size:10px;color:var(--muted);line-height:1.6;display:block}.range-label{display:flex;justify-content:space-between;margin-top:13px}.range-label output{color:var(--green);font-variant-numeric:tabular-nums;font-weight:600}input[type=range]{accent-color:var(--green);width:100%;height:14px;cursor:pointer;margin:8px 0}.range-ends{display:flex;justify-content:space-between;color:#8a9892;font-size:9px}details{margin:20px 0;border-top:1px solid var(--line);padding-top:13px}summary{font-size:11px;cursor:pointer;font-weight:600}details .pair{margin-top:14px}.run-button{display:flex;align-items:center;justify-content:space-between;width:100%;border:0;border-radius:7px;padding:15px 18px;background:var(--green);color:white;font-weight:600;margin-top:24px}.run-button:hover{background:#095541}.run-button b{font-size:20px;font-weight:400}.aside-foot{font-size:8px;letter-spacing:1.4px;color:#92a29a;margin-top:17px;text-align:center}main{padding:35px 36px 0;min-width:0;max-width:1700px}.workspace-heading{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:26px}h1{font-size:32px;font-weight:550;letter-spacing:-1.2px;margin:10px 0}p{line-height:1.6}.workspace-heading p{color:var(--muted);font-size:12px;margin:0}.state{background:#e4ede5;border:1px solid #d3e1d6;color:#466859;font-size:10px;padding:7px 11px;border-radius:30px;white-space:nowrap}.state.stale{background:#fff1d7;color:#8d5d18}.state.running{background:#d9ede8;color:#075749}.metrics{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:10px;background:#fff;margin-bottom:28px}.metrics>div{padding:18px 19px;border-right:1px solid var(--line)}.metrics>div:last-child{border:0}.metrics label{font-size:8px;letter-spacing:1.1px;color:var(--muted)}.metrics strong{display:block;font-size:26px;letter-spacing:-.8px;font-weight:500;margin:7px 0 4px;font-variant-numeric:tabular-nums}.metrics small{font-size:9px}.tabs{display:flex;border-bottom:1px solid var(--line);gap:26px;margin-bottom:22px}.tabs button{background:none;border:0;border-bottom:2px solid transparent;padding:0 0 13px;font-size:11px;color:var(--muted);white-space:nowrap}.tabs button.active{color:var(--green);border-color:var(--green);font-weight:700}.tab-panel{display:none}.tab-panel.active{display:block}.scene{position:relative;background:var(--dark);border-radius:12px;overflow:hidden;color:#c3ddd7;height:405px}.scene-title{position:absolute;top:20px;left:22px;right:22px;display:flex;justify-content:space-between;font-size:9px;letter-spacing:1px;gap:10px}.scene-title i{margin-right:8px}.scene-title span+span{color:#7ea3a0;letter-spacing:0}#modelCanvas{width:100%;height:100%;display:block}.scene-legend{position:absolute;bottom:18px;left:22px;right:22px;display:flex;gap:18px;align-items:center;font-size:9px;color:#83aba5}.scene-legend i{display:inline-block;width:13px;height:2px;background:#72dbb6;margin-right:5px;vertical-align:middle}.scene-legend .dash{background:none;border-top:1px dashed #829693}.scene-legend span:last-child{margin-left:auto}.empty{position:absolute;left:40px;top:67px;pointer-events:none}.empty h2{font-size:42px;line-height:1.08;letter-spacing:-1.5px;color:#e3f2e9;font-weight:450;margin:16px 0}.empty p{font-size:13px;color:#98b9b0}.empty>span:last-child{font-size:10px;color:#80a298}.pill{font-size:8px;letter-spacing:1.5px;color:#8bcbb3}.playback{display:flex;gap:20px;align-items:center;margin:17px 0 0}.secondary{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:6px;padding:9px 15px;background:#fff;color:var(--ink);font-size:11px;white-space:nowrap}.playback label{display:flex;align-items:center;gap:10px;flex:1;white-space:nowrap;font-size:10px}.playback input{max-width:135px}.playback output{font-size:10px;color:var(--green);min-width:35px}.caption{font-size:10px;color:var(--muted);margin:12px 0 22px}.notes{background:#eaf0e8;border:1px solid #dae4d6;border-radius:8px;padding:14px 20px;margin-top:20px}.notes p{font-size:11px;margin:5px 0;color:#5a6e5f}.section-top{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:20px}.section-top h2{font-size:21px;letter-spacing:-.5px;font-weight:550;margin:4px 0 8px}.section-top p{font-size:11px;color:var(--muted);margin:0}.section-top select{width:230px}.inline{display:flex;align-items:center;gap:10px;white-space:nowrap;font-size:10px}.inline input{width:90px}.image-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.card{background:white;border:1px solid var(--line);border-radius:9px;overflow:hidden;min-width:0}.card-title{font-size:9px;letter-spacing:1px;padding:15px 16px;border-bottom:1px solid var(--line);color:var(--green);font-weight:650}.card-title span{float:right;color:var(--muted);font-size:8px;letter-spacing:0;font-weight:400}.image-grid canvas{width:100%;height:280px;display:block;cursor:crosshair}.inspector{margin-top:20px;display:grid;grid-template-columns:1fr 140px 140px;gap:20px;padding:23px;border:1px solid var(--line);border-radius:9px;background:white}.inspector h3{font-size:16px;font-weight:550;margin:10px 0}.inspector p{font-size:11px;color:var(--muted);margin:0}.zoom-box label{font-size:9px;margin-bottom:6px}.zoom-box canvas{width:128px;height:128px;background:#f0f4f0;border-radius:6px}.field-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.field-grid .card-title{padding:14px 11px}.field-grid .card-title span{display:block;float:none;margin-top:5px}.field-grid canvas{width:100%;height:280px;display:block}.legend{padding:0 15px 17px;font-size:9px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:7px;color:var(--muted)}.legend .gradient{height:7px;width:100%;border-radius:3px;background:linear-gradient(90deg,#153550,#187e84,#57b993,#d7eab1)}.legend .gradient.error{background:linear-gradient(90deg,#437fb9,#f2f3ef,#dc6860)}.method-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:15px}.method-grid article{padding:22px}.step{color:#8eafa0;font-size:12px}.method-grid h3{font-size:16px;font-weight:550;margin:9px 0}.method-grid p{font-size:12px;color:var(--muted);margin:0}.raw{padding:17px;background:white;border:1px solid var(--line);border-radius:8px}pre{white-space:pre-wrap;overflow-wrap:anywhere;font-size:11px;line-height:1.6;color:#536a64}.text-link{font-size:11px;color:var(--green)}.disabled{opacity:.4;pointer-events:none}footer{display:flex;justify-content:space-between;font-size:8px;color:#87988e;letter-spacing:.8px;border-top:1px solid var(--line);padding:22px 0;margin-top:35px}#message{padding:13px 17px;background:#fff0dc;color:#83572a;border:1px solid #edd4b3;border-radius:7px;font-size:12px;margin-bottom:18px}#message.error{background:#fce8e5;color:#9b3d32;border-color:#edc3bc}#message.progress{background:#e0efea;color:#286a57;border-color:#c4ddd1}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}[hidden]{display:none!important}@media(min-width:1600px){.scene{height:480px}.image-grid canvas{height:360px}.field-grid canvas{height:340px}}@media(max-width:1150px){main{padding:28px 23px}.layout{grid-template-columns:270px minmax(0,1fr)}aside{padding:26px 18px}.metrics>div{padding:14px 10px}.metrics strong{font-size:21px}.tabs{gap:16px}.tabs button{font-size:10px}.playback{gap:10px}.playback label{gap:5px}.playback input{max-width:80px}.inspector{grid-template-columns:1fr 95px 95px;padding:18px;gap:10px}.zoom-box canvas{width:90px;height:90px}.section-top{align-items:flex-start;flex-direction:column}.field-grid .card-title{font-size:8px}.brand span{display:none}.scene-legend{font-size:8px;gap:8px}}@media(max-width:800px){.layout{display:block}aside{border-right:0;border-bottom:1px solid var(--line);padding:22px}.aside-head{display:none}#controls{display:grid;grid-template-columns:1fr 1fr;gap:10px 18px}#controls>.section-label,#controls>.objects,#controls>details,#controls>small{grid-column:1/-1}.section-label{margin:12px 0 2px}main{padding:25px 16px}.masthead{padding:0 20px;height:65px}.local{font-size:10px}.metrics{grid-template-columns:1fr 1fr}.metrics>div:nth-child(2){border:0}.metrics>div:nth-child(-n+2){border-bottom:1px solid var(--line)}.tabs{overflow:auto;gap:24px}.field-grid{grid-template-columns:1fr}.image-grid{grid-template-columns:1fr}.scene{height:350px}.workspace-heading h1{font-size:26px}.playback{flex-wrap:wrap}.playback label{min-width:180px}.method-grid{grid-template-columns:1fr}.empty h2{font-size:36px}.scene-title{font-size:8px}.scene-legend span:last-child{display:none}footer{font-size:7px;gap:10px}.inspector{grid-template-columns:1fr 1fr}.inspector>div:first-child{grid-column:1/-1} .zoom-box canvas{width:100%;height:140px}}
@media(min-width:801px){aside{position:sticky;top:0;height:calc(100vh - 82px);display:flex;flex-direction:column;min-height:540px}aside form{display:flex;flex-direction:column;min-height:0;flex:1}#controls{overflow-y:auto;min-height:0;flex:1;padding-right:6px;scrollbar-width:thin;scrollbar-color:#ceded3 transparent}.aside-head p{margin-bottom:10px}.run-button{flex-shrink:0;margin-top:16px}.aside-foot{flex-shrink:0}} 

/* Deformation-panel-only 3D controls. */
#modelCanvas{cursor:grab;touch-action:none}#modelCanvas.orbiting{cursor:grabbing}.view-tools{position:absolute;right:20px;top:44px;display:flex;align-items:center;gap:6px}.view-tools>span{font-size:9px;color:#8faea5;margin-right:5px}.view-tools button{border:1px solid #436760;background:#173c39;color:#c7e7d9;border-radius:4px;padding:5px 8px;font-size:10px}.view-tools button:hover{background:#28544b}.scene-title,.scene-legend{pointer-events:none}@media(max-width:800px){.view-tools>span{display:none}.view-tools{right:12px;top:43px}}

.stress-controls{display:flex;align-items:center;gap:18px;padding:17px 0 5px;flex-wrap:wrap}.stress-controls>label{font-size:11px;font-weight:600}.stress-controls select{width:250px}.stress-legend{flex:1;min-width:200px;max-width:420px;margin-left:auto}.stress-scale{height:9px;border-radius:5px;background:linear-gradient(90deg,rgb(48,117,232),rgb(33,196,204),rgb(244,211,70),rgb(247,135,49),rgb(229,55,54))}.stress-ticks{display:flex;justify-content:space-between;font-size:10px;color:var(--muted);margin-top:5px}.stress-legend p{font-size:10px;margin:4px 0;color:var(--muted)}@media(max-width:800px){.stress-controls{gap:10px}.stress-legend{margin-left:0;max-width:none;width:100%}}
/* Additional experiments and measured profiles. */
.objects{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px}.objects .object:nth-child(n+4){grid-column:auto}.compare-toggle{display:flex;align-items:center;gap:8px;padding:12px 0 3px;font-weight:600;color:var(--green)}.compare-toggle input{accent-color:var(--green)}#cameraControls{grid-column:1/-1}.tabs{overflow-x:auto}.tabs button{white-space:nowrap}.profile-card{padding:24px;margin-top:20px}.profile-card h2{font-size:22px;margin:0}.profile-card .section-top p{margin-bottom:0}.profile-controls{display:flex;gap:24px;align-items:center;margin:18px 0}.profile-controls select{min-width:185px}.line-position{flex:1}.line-position output{display:block;color:var(--green);font-variant-numeric:tabular-nums}.profile-layout{display:grid;grid-template-columns:180px minmax(0,1fr);gap:20px;align-items:center}.profile-layout canvas{display:block;width:100%;height:300px}#profileMap{height:190px;border:1px solid var(--line);border-radius:8px;background:#f6f9f5}.curve-key{display:flex;flex-wrap:wrap;gap:16px;font-size:11px;margin:0 0 5px 25px}.curve-key .truth{color:#183f43}.curve-key .measured{color:#d57245}.curve-key .baseline{color:#087f85}.noise-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.noise-grid img{display:block;width:100%;height:210px;object-fit:contain;padding:14px;background:#f2f5f0}.noise-grid canvas{width:100%;height:270px;display:block}.noise-image-controls{max-width:240px;margin-bottom:16px}.comparison-table{overflow-x:auto}.comparison-table table{border-collapse:collapse;background:white;width:100%;font-size:12px;margin:10px 0}.comparison-table th,.comparison-table td{text-align:left;padding:13px;border-bottom:1px solid var(--line)}.comparison-table th{font-weight:600;color:var(--green)}.torsion-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.torsion-grid canvas{width:100%;height:300px;display:block}.torsion-grid article:last-child{grid-column:1/-1}.torsion-grid .caption{padding:0 22px 15px}.stress-scale.signed{background:linear-gradient(90deg,#357abe,#f3f1e8,#e53736)}#radiusControl,#momentControl,#torqueControl{margin:12px 0}.profile-controls label{min-width:0}@media(max-width:1100px){.profile-layout{grid-template-columns:1fr}#profileMap{height:150px}.torsion-grid{grid-template-columns:1fr}.torsion-grid article:last-child{grid-column:auto}}@media(max-width:800px){.noise-grid{grid-template-columns:1fr}.profile-card{padding:15px}.profile-controls{flex-direction:column;align-items:stretch}.profile-layout{gap:10px}.curve-key{margin-left:0;font-size:10px}.profile-layout canvas{height:280px}}

@media(max-width:800px){#cameraControls,#torsionOnlyNote{grid-column:1/-1}}

/* Stereo torsion only. */
.stereo-images{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-bottom:16px}
.stereo-images canvas{width:100%;height:180px;display:block}
#stereoProfile{width:100%;height:290px}#stereo .torsion-grid{grid-template-columns:1fr 1fr;margin-top:22px}
#stereoRow{max-width:180px}#stereo .section-top{margin-top:25px}
@media(max-width:700px){.stereo-images,#stereo .torsion-grid{grid-template-columns:1fr}}