@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=DM+Serif+Display:ital@0;1&display=swap');
:root{--ink:#253d36;--muted:#73847b;--accent:#d77b5d;--line:#dfe7df;--cream:#f4f5ef}*{box-sizing:border-box}body{margin:0;background:var(--cream);color:var(--ink);font-family:'DM Sans',sans-serif}header{height:78px;display:flex;align-items:center;justify-content:space-between;padding:0 6%;border-bottom:1px solid #e0e6dd}.brand{display:flex;gap:10px;align-items:center;text-decoration:none;color:var(--ink);font-family:'DM Serif Display',serif;font-size:27px;line-height:.75}.brand small{font:700 8px 'DM Sans',sans-serif;display:block;letter-spacing:1.5px;margin-top:8px}.mark{font-size:35px;color:var(--accent)}.topnote{font-size:12px;color:#93a29a}.badge,.pill{font-size:9px;letter-spacing:1.2px;font-weight:700;border:1px solid #cad8ce;border-radius:30px;padding:9px 12px}main{max-width:1440px;margin:auto;padding:0 6%}.intro{display:flex;justify-content:space-between;align-items:end;padding:57px 0 43px}.eyebrow{font-size:10px;font-weight:700;letter-spacing:1.8px;color:#84998c}.eyebrow span{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--accent);margin-right:8px}h1,h2,h3,p{margin:0}h1,h2,h3{font-family:'DM Serif Display',Georgia,serif;font-weight:400}h1{font-size:clamp(48px,6vw,82px);line-height:.98;letter-spacing:-2px;margin:18px 0}em{font-weight:400;color:#7d9c88}.intro p{max-width:405px;line-height:1.65;color:#708379;font-size:14px}.intro-index{text-align:right;color:#9bad9f;font-size:10px;letter-spacing:1.4px;line-height:1.6}.intro-index span{font-family:Georgia;font-size:16px;color:var(--accent)}.intro-index p{font-size:9px;line-height:1.5;margin-top:12px}.workspace{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(330px,1fr);gap:20px;align-items:stretch}.viewer,.study{background:#fff;border:1px solid #e4ebe3;border-radius:13px;overflow:hidden}.viewer{padding:26px;display:flex;flex-direction:column}.viewer-head,.study-top,.labelrow,.list-head,.viewer-foot{display:flex;justify-content:space-between;align-items:center}.viewer-head h2{font-size:24px;margin-top:7px}.viewer-head h2 span{color:#a1b4a7;font:15px sans-serif}.pill{color:#708b78;background:#f4f8f3}.frame{position:relative;flex:1;min-height:575px;margin-top:22px;border-radius:8px;background:#edf1eb;overflow:hidden}iframe{display:block;width:100%;height:100%;min-height:575px;border:0}.frame-fallback{background:#edf1eb;padding:10px;font-size:11px;color:#718479}.frame-fallback a,.viewer-foot a{color:#577d68}.viewer-foot{font-size:11px;color:#85978a;padding-top:18px}.viewer-foot a{text-decoration:none}.study{padding:28px 30px}.round{border:1px solid #dce7dd;border-radius:50%;width:32px;height:32px;display:grid;place-items:center;color:var(--accent)}.study h2{font-size:40px;line-height:1.03;margin:20px 0 12px}.description,.sub,.hint{font-size:12px;line-height:1.65;color:#899b8f}.divider{height:1px;background:var(--line);margin:25px 0}.number{font:italic 18px Georgia;color:#c4d1c5}.study h3{font-size:25px;line-height:1.1;margin:13px 0 5px}.toggle{display:flex;background:#f0f4ef;padding:4px;border-radius:8px;margin:22px 0}.toggle button{width:50%;border:0;background:none;padding:10px;border-radius:6px;color:#84968a;font:600 12px 'DM Sans',sans-serif;cursor:pointer}.toggle .active{background:white;color:var(--ink);box-shadow:0 2px 8px #36583e12}.list-head{font-size:9px;letter-spacing:1.2px;font-weight:700;color:#9aaba0}.list-head button{border:0;background:none;color:#bb6d55;font-size:11px;cursor:pointer}ol{list-style:none;padding:0;margin:12px 0}li{display:flex;gap:12px;align-items:center;border-bottom:1px solid #eef2ed;padding:11px 0;font-size:13px}.dot{display:grid;place-items:center;border:1px solid #d4e3d6;color:#7f9d87;width:23px;height:23px;border-radius:50%;font-size:10px;flex:none}.hidden-term{color:#b2c0b4;letter-spacing:2px}.hint{margin:15px 0}.source{display:flex;justify-content:space-between;text-decoration:none;background:#2f5041;color:#fff;padding:15px 17px;border-radius:7px;font-size:12px}.note{display:flex;gap:15px;padding:27px 0 45px;color:#87998b;font-size:12px;line-height:1.6;max-width:750px}.note span{color:var(--accent);font-size:22px}.note strong{color:#586f60}footer{border-top:1px solid #dfe7df;padding:23px 6%;display:flex;justify-content:space-between;color:#99a99d;font-size:9px;letter-spacing:1px}@media(max-width:800px){header{height:67px}.topnote,.intro-index{display:none}.intro{padding:42px 0 32px}.workspace{grid-template-columns:1fr}.viewer{padding:18px}.frame,iframe{min-height:480px}.study{padding:24px}.intro p{font-size:13px}h1{font-size:56px}footer span:last-child{display:none}}@media(max-width:420px){.frame,iframe{min-height:400px}.viewer-head h2{font-size:20px}.pill{font-size:8px;padding:7px}.intro h1{font-size:49px}}
#model{position:absolute;inset:0;touch-action:none}#model canvas{display:block;width:100%;height:100%}.model-status{position:absolute;top:18px;left:18px;color:#738b7a;font-size:12px;pointer-events:none}.reset-model{position:absolute;top:15px;right:15px;border:1px solid #d5e0d5;background:#fff;border-radius:20px;padding:9px 13px;color:#365743;font:600 11px 'DM Sans',sans-serif;cursor:pointer}.note a{color:#577d68}
.illustration{margin-top:20px;padding:30px;background:white;border:1px solid #e4ebe3;border-radius:13px}.illustration-head{display:flex;justify-content:space-between;align-items:center;gap:20px}.illustration-head h2{font-size:35px;margin:9px 0}.illustration-head p,.image-credit{font-size:12px;line-height:1.6;color:#84968a}.illustration-head button{border:1px solid #d5e1d7;background:#f5f8f4;color:#3c5d49;border-radius:22px;padding:10px 15px;font:600 12px 'DM Sans',sans-serif;white-space:nowrap;cursor:pointer}.illustration-image{position:relative;max-width:900px;margin:20px auto 0}.illustration-image img{display:block;width:100%;height:auto}.illustration-image .markup{position:absolute;inset:0}.illustration-image .markup[hidden]{display:none}.image-credit a{color:#577d68}@media(max-width:600px){.illustration{padding:20px}.illustration-head{align-items:flex-start;flex-direction:column}.illustration-head h2{font-size:29px}}
.jump{display:inline-block;margin:0 0 20px;color:#315943;background:#e5eee5;border:1px solid #d5e3d6;padding:12px 16px;border-radius:8px;text-decoration:none;font-size:13px;font-weight:700;scroll-margin-top:20px}#labeled-bone{scroll-margin-top:16px}

.illustration[hidden],.parts-unavailable[hidden]{display:none}.parts-unavailable{margin:18px 0 0;padding:14px;background:#f5f8f4;border-radius:8px;color:#718579;font-size:12px}
.c3-button{align-self:flex-start;margin-top:16px;border:1px solid #d5e3d6;background:#f4f8f3;padding:9px 13px;border-radius:7px;color:#426f54;font:600 12px 'DM Sans',sans-serif;cursor:pointer}.c3-button:disabled{opacity:.5;cursor:wait}
.landmark-markers{position:absolute;inset:0;pointer-events:none}.landmark-markers[hidden]{display:none}.landmark-marker{position:absolute;transform:translate(-50%,-50%);width:26px;height:26px;display:grid;place-items:center;padding:0;border:2px solid #fff;border-radius:50%;background:#b85e42;color:white;box-shadow:0 2px 6px #223b364d;font:700 12px 'DM Sans',sans-serif;cursor:pointer;pointer-events:auto}.landmark-marker.selected,.landmark-marker:focus-visible{background:#254f3b;outline:3px solid #b5d2bb}#terms li.selected{background:#edf5ed;border-radius:6px}
.workspace{margin-top:24px}
.search-area{position:relative;z-index:5;padding-top:24px;max-width:620px}.search-area label{display:block;color:#647e6c;font-size:11px;font-weight:700;letter-spacing:.5px;margin-bottom:8px}.search-box{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid #d7e2d8;border-radius:9px;padding:0 13px}.search-box>span{font-size:24px;color:#789482}.search-box input{min-width:0;flex:1;border:0;outline:0;background:transparent;color:#253d36;padding:14px 0;font:14px 'DM Sans',sans-serif}.search-box button{border:0;background:none;color:#547762;cursor:pointer}.search-results{position:absolute;left:0;right:0;max-height:320px;overflow:auto;background:#fff;border:1px solid #d7e2d8;border-radius:9px;box-shadow:0 8px 24px #253d3620}.search-results[hidden]{display:none}.search-results button{display:flex;flex-direction:column;gap:3px;width:100%;text-align:left;border:0;border-bottom:1px solid #edf2ed;background:white;padding:11px 14px;color:#253d36;cursor:pointer}.search-results button:hover,.search-results button:focus-visible{background:#edf5ed}.search-results button span,.search-results p{font-size:11px;color:#74897a}.search-results p{padding:0 14px}