:root{--ink:#23362e;--muted:#657169;--paper:#fcfcf8;--stage:#f0f1e9;--line:#dfe3d8;--lime:#cfed85;--accent:#71902b;--radius:18px;font-family:Arial,Helvetica,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,input{font:inherit}button{cursor:pointer;color:inherit}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid #678d30;outline-offset:4px}button{touch-action:manipulation}a{color:inherit;text-underline-offset:3px}[hidden]{display:none!important}.widget{max-width:1440px;padding:22px 24px 20px;margin:auto}.heading{margin-bottom:22px}h1{font-weight:500;letter-spacing:-1.3px;line-height:1.15;font-size:clamp(30px,3vw,40px);margin:0 0 9px}h1>span{color:#8ba744}.lede{font-size:14px;color:var(--muted);margin:0;line-height:1.5}.explorer{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(310px,1fr);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:white}.stage-wrap{position:relative;background:var(--stage);min-height:536px;overflow:hidden}.viewbar{position:absolute;top:20px;left:22px;z-index:3;display:flex;padding:4px;background:#fff9;border:1px solid #e0e3d8;border-radius:28px;gap:1px}.view{border:0;background:transparent;border-radius:22px;padding:10px 15px;font-size:11px;color:#667067}.view span{margin-left:5px}.view.active{background:var(--ink);color:#fff}.view:not(.active):hover{background:#e5eacb}#stage{position:absolute;inset:0;touch-action:none}canvas{display:block;width:100%;height:100%;position:absolute;inset:0;outline:none}#poster{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.9}#loading{position:absolute;left:50%;top:58%;transform:translate(-50%,-50%);background:#fff;padding:12px 20px;border-radius:22px;white-space:nowrap;font-size:12px;box-shadow:0 4px 18px #23362e12}#loading.error{white-space:normal;max-width:80%;width:340px;text-align:center;line-height:1.6;top:70%}#callout{position:absolute;pointer-events:none;z-index:2;display:none;align-items:center;gap:8px;padding:8px 12px;background:#fffffff0;border:1px solid #d8decd;border-radius:24px;box-shadow:0 3px 8px #26371c0a;font-size:11px;white-space:nowrap;transform:translate(-50%,-115%)}#callout span{width:7px;height:7px;background:#8eaa3a;border-radius:50%;box-shadow:0 0 0 3px #deedbd}.stage-bottom{position:absolute;bottom:20px;left:26px;right:22px;display:flex;align-items:center;justify-content:space-between;pointer-events:none;gap:12px}.stage-bottom p{font-size:10px;color:#68715f;margin:0}.stage-bottom p span{margin:0 7px}.camera-buttons{display:flex;gap:4px;pointer-events:auto}.camera-buttons button{width:33px;height:33px;border:1px solid #dce1d2;background:#ffffffb3;border-radius:50%;font-size:19px}.camera-buttons button:hover{background:var(--lime)}.layer-control{position:absolute;bottom:65px;left:27px;right:27px;display:flex;align-items:center;gap:14px;font-size:10px;padding:9px 14px;background:#ffffffe8;border:1px solid var(--line);border-radius:24px}.layer-control input{min-width:30px;flex:1;accent-color:#708e2f}.layer-control span{min-width:32px}.info{display:flex;flex-direction:column;min-width:0;border-left:1px solid var(--line);height:536px;background:var(--paper)}.info-top{display:flex;justify-content:space-between;padding:26px 28px 18px;font-size:9px;letter-spacing:1.4px;font-weight:700}.info-top>span:first-child{color:#738b42}.info-top>span:last-child{color:#8b9186}.info-scroll{padding:0 28px 20px;overflow:auto;scrollbar-width:thin;flex:1;scrollbar-color:#d5dbc9 transparent}.info h2{font-size:31px;letter-spacing:-1px;line-height:1.1;margin:8px 0 4px;font-weight:500}.english{font-size:11px;color:#899180;margin:0 0 21px}.intro{font-size:13px;line-height:1.75;color:#536152;margin:0 0 19px}.materials-label{font-size:9px;font-weight:700;letter-spacing:1.25px;text-transform:uppercase;margin:20px 0 10px}.material-tabs{display:flex;flex-wrap:wrap;gap:5px;margin-bottom:12px}.material-tab{font-size:10px;border:1px solid #dce2d2;background:transparent;border-radius:20px;padding:7px 11px;line-height:1.3}.material-tab.active{background:#eaf2d7;border-color:#c8d6a4;color:#3d5527}.material-tab:hover{border-color:#6f8c3a}.material-copy{font-size:12px;line-height:1.75;color:#62705d;min-height:65px;margin:0}.takeaway{margin-top:20px;border-left:2px solid #b6d66e;padding:0 0 0 13px}.takeaway strong{display:block;font-size:9px;letter-spacing:1px;margin-bottom:6px}.takeaway p{font-size:11px;line-height:1.65;margin:0;color:#617052}.sources{font-size:9px;line-height:1.8;margin-top:15px;color:#7f8876}.sources a{display:block}.info-footer{border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;padding:15px 28px}.info-footer>span{font-size:9px;color:#7c8674}.info-footer button{background:transparent;border:0;font-size:11px;padding:2px}.info-footer button>span{margin-left:18px;font-size:18px}.parts-nav{margin-top:26px}.nav-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}.nav-header h2{font-size:12px;font-weight:500;margin:0}.nav-header a{font-size:11px;padding:5px 0;text-decoration:none}.nav-header a:hover{text-decoration:underline}.nav-header a span{margin-left:9px}.part-list{display:flex;flex-wrap:wrap;gap:7px}.part-button{border:1px solid var(--line);border-radius:7px;background:transparent;font-size:11px;padding:10px 12px;display:flex;align-items:center;gap:8px;transition:background .15s}.part-button small{font-size:8px;color:#8a947e;font-variant-numeric:tabular-nums}.part-button.active{background:var(--ink);color:white;border-color:var(--ink)}.part-button.active small{color:#c0d499}.part-button.hovered{background:#e5efcf;border-color:#b5c78c}.part-button:hover:not(.active){background:#edf2e2}.geometry-section{margin-top:38px;padding:30px;background:#eff3e7;border:1px solid #dce5ce;border-radius:var(--radius);scroll-margin-top:24px}.geometry-heading{max-width:740px;margin-bottom:26px}.geometry-heading .section-kicker{font-size:9px;font-weight:700;letter-spacing:1.4px;color:#647d3b;margin:0 0 12px}.geometry-heading h2{font-size:clamp(24px,2.4vw,32px);line-height:1.2;letter-spacing:-.8px;font-weight:500;margin:0 0 12px}.geometry-heading>p:last-child{font-size:14px;line-height:1.7;color:#62705d;margin:0}#geometry-panel{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:26px 30px}#geometry-panel article{border-top:1px solid #d3ddc5;padding-top:17px}#geometry-panel h3{font-size:15px;font-weight:600;line-height:1.4;margin:0 0 9px}#geometry-panel p{font-size:13px;line-height:1.8;color:#58664f;margin:0}.footnote{display:flex;justify-content:space-between;gap:24px;border-top:1px solid var(--line);margin-top:25px;padding-top:14px;color:#8a9282;font-size:9px;line-height:1.8}.footnote p{margin:0}.footnote>p strong{color:var(--muted)}.footnote details{max-width:480px;min-width:130px}.footnote summary{cursor:pointer;text-align:right}.footnote details[open] summary{margin-bottom:10px}.footnote details p{margin-bottom:8px}.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(min-width:1450px){.stage-wrap,.info{min-height:585px;height:585px}.info-scroll{padding-top:7px}.info h2{font-size:36px}.intro{font-size:14px}.material-copy{font-size:13px}}
@media(max-width:980px){#geometry-panel{grid-template-columns:repeat(2,minmax(0,1fr))}.widget{padding:26px 22px 18px}.explorer{grid-template-columns:minmax(0,1.35fr) minmax(285px,1fr)}.info-top,.info-footer{padding-left:21px;padding-right:21px}.info-scroll{padding-left:21px;padding-right:21px}.viewbar{left:14px}.view{padding:9px 11px}.stage-bottom{left:18px;right:16px}.stage-bottom p{max-width:145px;line-height:1.7}.layer-control{left:15px;right:15px}}
@media(max-width:690px){.widget{padding:22px 15px 16px}.heading{margin-bottom:23px}h1{font-size:30px;letter-spacing:-1px}.lede{font-size:12px}.explorer{display:flex;flex-direction:column}.stage-wrap{min-height:370px;height:370px}.info{height:auto;min-height:390px;max-height:none;border-left:0;border-top:1px solid var(--line)}.info-top{padding-top:21px;padding-bottom:9px}.info-scroll{overflow:visible;padding-bottom:23px}.info h2{font-size:29px}.intro{font-size:13px;max-width:550px}.info-footer{padding-top:11px;padding-bottom:11px}.viewbar{top:14px}.view{font-size:10px}.stage-bottom{bottom:13px}.stage-bottom p{max-width:190px;font-size:9px}.camera-buttons button{width:30px;height:30px}.layer-control{bottom:56px}.nav-header h2{font-size:11px}.part-button{font-size:10px;padding:9px 10px}.parts-nav{margin-top:21px}.geometry-section{margin-top:28px;padding:22px 20px;scroll-margin-top:15px}.geometry-heading{margin-bottom:22px}.geometry-heading h2{font-size:25px}.geometry-heading>p:last-child{font-size:13px}#geometry-panel{grid-template-columns:1fr;gap:22px}.nav-header{gap:16px}.nav-header a{font-size:10px;text-align:right}.footnote{display:block;margin-top:20px;font-size:9px}.footnote details{margin-top:9px}.footnote summary{text-align:left}.material-copy{min-height:0}}
html.embedded .heading{display:none}html.embedded .widget{padding:0 0 16px}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}