:root{--ink:#193e36;--muted:#61746b;--paper:#f6f7f0;--line:#d9e1d4;--green:#214f3e;--lime:#e6edcb;--gold:#c4a570;--white:#fffef9;--serif:Georgia,'Times New Roman',serif;font-family:Arial,Helvetica,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{opacity:.5;cursor:default}button:focus-visible,a:focus-visible,canvas:focus-visible{outline:3px solid #b48948;outline-offset:4px}input:focus,textarea:focus,select:focus{outline:2px solid #68886b;outline-offset:2px}[hidden]{display:none!important}.skip{position:absolute;top:-60px;left:20px;z-index:50;background:white;padding:15px}.skip:focus{top:10px}.wrap{max-width:1440px;width:calc(100% - 96px);margin-inline:auto}.prototype-bar{display:flex;align-items:center;justify-content:center;gap:16px;padding:9px 25px;background:#e6ecdf;color:#496052;font-size:11px;letter-spacing:.25px}.prototype-bar>span{font-size:9px;letter-spacing:1.7px;font-weight:700}.prototype-bar a{text-decoration:underline;margin-left:20px}.site-header{display:flex;justify-content:space-between;align-items:center;padding:22px 48px;border-bottom:1px solid var(--line);background:#f9faf5}.wordmark{display:flex;align-items:center;gap:13px}.wordmark>span:last-child{font-size:9px;font-weight:700;line-height:1.55;letter-spacing:1.4px}.brand-orbit{font-family:var(--serif);font-size:40px;letter-spacing:-5px;width:72px}.brand-orbit span{color:#87a369}.site-header nav{display:flex;gap:28px;font-size:12px}.site-header nav a{padding:10px 0;color:#5f7268}.site-header nav a[aria-current]{color:var(--ink);border-bottom:2px solid var(--green)}.header-small{font-size:12px;border:1px solid #c6d2be;padding:12px 18px;border-radius:24px}.header-small span{padding-left:20px}.intro{display:flex;justify-content:space-between;gap:50px;align-items:end;padding:45px 0 34px}.eyebrow{font-size:10px;letter-spacing:1.8px;font-weight:700;color:#6b8066;margin:0 0 16px;line-height:1.6}h1{font:64px/1.02 var(--serif);font-weight:400;letter-spacing:-2.4px;margin:0}h1 em,h2 em{font-weight:400;color:#74905d}h2{font:34px/1.12 var(--serif);font-weight:400;letter-spacing:-.6px;margin:0 0 16px}h3{font-size:15px;margin:16px 0 10px}p{line-height:1.75}.intro-copy{font-size:15px;line-height:1.8;padding-bottom:7px}.micro-tag{display:inline-flex;align-items:center;gap:10px;border-top:1px solid var(--line);padding-top:12px;font-size:11px;color:var(--muted)}.micro-tag i{width:6px;height:6px;border-radius:50%;background:#91a867}.explorer{display:grid;grid-template-columns:210px minmax(300px,1fr) 290px;gap:20px;align-items:stretch}.region-panel{padding:26px 0}.region-choices{display:flex;flex-direction:column;gap:10px}.region-choices button{display:flex;align-items:center;text-align:left;gap:12px;padding:18px 14px;border:1px solid transparent;border-radius:13px;background:transparent;color:var(--ink);transition:background .2s,border .2s}.region-choices button[aria-pressed=true]{background:#e7eddb;border-color:#cbd8b9}.region-choices button:hover{background:#edf1e5}.choice-number{font-size:10px;color:#81916e}.region-choices button>span:nth-child(2){flex:1}.region-choices b{font-size:14px;font-weight:600;display:block}.region-choices small{font-size:10px;display:block;color:#748371;margin-top:7px}.tour-card{padding:26px 15px 18px;margin-top:25px;border-top:1px solid var(--line)}.tour-mark{display:block;font-size:25px;color:#8ba068;margin-bottom:15px}.tour-card h2{font-size:23px;line-height:1.2}.tour-card p{font-size:12px;color:var(--muted)}.text-button{background:transparent;border:0;padding:9px 0;color:#315b45;font-size:12px;text-decoration:underline;text-underline-offset:4px}.text-button.muted{margin-left:12px;color:#68776c}.quiet-note{font-size:11px;padding:10px 15px;color:#6f7c6b}.scene-panel{border:1px solid #d4dfcc;border-radius:24px;overflow:hidden;background:radial-gradient(ellipse at 49% 42%,#edf4de,#dce7d2 70%,#d7e0ce);min-width:0;position:relative}.scene-toolbar{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:19px 18px 0;position:relative;z-index:2}.layer-switch{display:flex;padding:4px;gap:2px;background:#f9fbf0b3;border:1px solid #c7d4bc;border-radius:40px}.layer-switch button{border:0;background:transparent;padding:9px 11px;border-radius:30px;font-size:10px;color:#516b4d}.layer-switch button[aria-pressed=true]{background:#35543f;color:#f4f7e8}.scene-small{background:transparent;border:0;text-decoration:underline;text-underline-offset:3px;font-size:10px;color:#58714f;padding:9px}.anatomy-scene{height:565px;position:relative;touch-action:pan-y}.anatomy-scene canvas{display:block;width:100%;height:100%;touch-action:none}.model-loading{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;padding:35px;text-align:center;pointer-events:none;background:radial-gradient(ellipse,#eaf1dbec,#dce7d2dd)}.model-loading strong{font:22px var(--serif)}.model-loading small{font-size:12px;line-height:1.6}.loading-orbit{width:38px;height:38px;border:1px solid #b8caaa;border-top:2px solid #5c7b4e;border-radius:50%;animation:spin 2s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.scene-selection{position:absolute;top:30px;left:24px;pointer-events:none}.scene-selection span{display:block;font-size:8px;letter-spacing:1.5px;color:#7c8c6c;margin-bottom:7px}.scene-selection strong{font-size:12px;font-weight:500;color:#48613e}.orientation-label{position:absolute;bottom:15px;left:24px;font-size:8px;letter-spacing:1.7px;color:#6e835c}.scene-footer{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:0 18px;padding:14px 0;border-top:1px solid #bfceb4}.scene-footer>span{font-size:9px;color:#718164}.view-controls{display:flex;flex-wrap:wrap;gap:2px}.view-controls button{background:transparent;border:0;font-size:10px;color:#49613f;padding:9px}.model-scope{font-size:9px;line-height:1.5;margin:0;padding:0 20px 17px;color:#657858}.model-scope a{text-decoration:underline}.learn-panel{background:#fcfcf6;border:1px solid var(--line);padding:28px 25px;border-radius:20px}.learn-panel h2{font-size:36px;margin-bottom:8px}.serif-note{font:italic 17px/1.5 var(--serif);color:#8d784f;margin:8px 0 15px}.learn-panel>p:not(.eyebrow):not(.serif-note):not(.small-note){font-size:12px;color:#617263}.learning-fact{border-top:1px solid #e3e8db;padding:8px 0}.learning-fact h3{font-size:12px;margin:11px 0 7px}.learning-fact p{font-size:11px;line-height:1.8;margin:0 0 8px;color:#6a7666}.solid-button,.outline-button{display:inline-flex;align-items:center;justify-content:center;gap:20px;border-radius:30px;font-size:12px;padding:14px 20px;border:1px solid #315943;background:#315943;color:#fffef5;line-height:1.4;cursor:pointer;text-align:center}.outline-button{background:transparent;color:var(--green);border-color:#c7d4be}.solid-button:hover{background:#214531}.outline-button:hover{background:#edf1e3}.learn-panel>.solid-button{display:flex;width:100%;padding:13px;margin-top:14px;gap:10px;font-size:11px}.small-note{font-size:11px;line-height:1.7;color:#6d796a}.source-details{font-size:11px;margin-top:15px}.source-details summary{cursor:pointer;color:#476142;padding:8px 0}.source-details a{display:block;text-decoration:underline;margin:9px 0;line-height:1.5}.source-details p{font-size:10px;color:#737f6c}.safety-wrap{margin-top:22px}.safety-wrap details{border:1px solid #e2d8c2;background:#f6f1e6;border-radius:13px}.safety-wrap summary{display:flex;align-items:center;gap:17px;list-style:none;padding:18px 24px;cursor:pointer}.safety-wrap summary>span:nth-child(2){flex:1}.safety-dot{width:24px;height:24px;display:flex;align-items:center;justify-content:center;border:1px solid #b89d66;border-radius:50%;color:#a17e3e;font-size:12px}.safety-wrap b{font-size:12px;color:#6b5936;font-weight:500}.safety-wrap small{display:block;font-size:10px;color:#8b7b5a;margin-top:5px;line-height:1.6}.safety-content{display:grid;grid-template-columns:1fr 1fr;gap:35px;border-top:1px solid #e5dac5;padding:15px 30px 25px;color:#675940}.safety-content h3{font-size:14px}.safety-content p{font-size:12px}.story-section{display:grid;grid-template-columns:.9fr 1.1fr;gap:70px;padding:90px 0 70px;align-items:start}.story-heading{position:sticky;top:30px}.story-heading h2{font-size:44px;line-height:1.15}.story-heading>p:not(.eyebrow){font-size:14px;max-width:410px;color:#687763}.story-steps{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:30px;font-size:10px;color:#7c8e70}.story-steps i{font-style:normal}.story-form{border:1px solid var(--line);border-radius:20px;background:var(--white);padding:30px}.form-top{display:flex;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:20px;margin-bottom:25px;gap:15px}.form-top strong{font:24px var(--serif)}.form-top>span{font-size:10px;color:#7d8b70;align-self:center}label{display:block;font-size:12px;font-weight:500;line-height:1.6;margin-bottom:18px}input,select,textarea{display:block;width:100%;border:1px solid #ced9c5;border-radius:8px;padding:12px;background:#fafbf6;color:var(--ink);margin-top:7px;font-size:14px;line-height:1.5}textarea{resize:vertical;min-height:90px}input::placeholder,textarea::placeholder{color:#8b9685;font-size:12px}.form-pair{display:grid;grid-template-columns:1fr 1fr;gap:18px}.warning-fieldset{margin:12px 0 20px;border:1px solid #e4dbc8;border-radius:12px;background:#f8f4eb;padding:18px}.warning-fieldset legend{font-size:11px;padding:0 7px;color:#76613d}.warning-fieldset p{font-size:11px;color:#786a50;margin:5px 0 15px}.warning-fieldset select{background:#fffdf8}.check-label{display:flex;align-items:flex-start;gap:11px;font-size:11px;line-height:1.7;font-weight:400}.check-label input{width:17px;height:17px;margin:2px 0 0;flex-shrink:0;accent-color:#375d3d}.guidance-box{padding:18px 22px;border:1px solid #dbcaa6;background:#f6edda;color:#6e5329;border-radius:10px;margin:20px 0;font-size:13px;line-height:1.7}.guidance-box[data-level=emergency]{background:#fff0ea;border-color:#d6ab95;color:#813e25}.guidance-box[data-level=record]{background:#eef2e5;border-color:#cbd8bb;color:#44603a}.guidance-box strong{display:block;margin-bottom:6px}.worksheet-section{padding-bottom:45px}.worksheet{background:white;border:1px solid #d4dfcb;padding:45px;max-width:1000px;margin:auto}.worksheet-brand{display:flex;justify-content:space-between;gap:20px;font-size:10px;letter-spacing:1px;border-bottom:1px solid var(--line);padding-bottom:20px;margin-bottom:25px}.worksheet-brand span{color:#859274}.worksheet dl{display:grid;grid-template-columns:170px 1fr;gap:18px;font-size:13px;line-height:1.7}.worksheet dt{color:#607653}.worksheet dd{margin:0;white-space:pre-wrap;overflow-wrap:anywhere}.worksheet ul,.worksheet>p{font-size:13px;line-height:1.8}.diary-table{width:100%;border-collapse:collapse;font-size:12px;margin:20px 0}.diary-table th,.diary-table td{border:1px solid #d7dfce;text-align:left;padding:10px}.diary-table td{height:42px}.worksheet .worksheet-limit{font-size:10px;color:#728167}.worksheet-tools{max-width:1000px;margin:25px auto 0}.button-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}.worksheet-tools [role=status]{font-size:12px;line-height:1.7}.bridge{display:flex;justify-content:space-between;align-items:center;gap:35px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:35px 0}.bridge h2{font-size:29px}.bridge p:not(.eyebrow){font-size:13px;max-width:650px;color:var(--muted)}.bridge>a{flex-shrink:0}footer{display:flex;justify-content:space-between;gap:25px;padding:26px 0;font-size:10px;color:#7b8a70}footer a{text-decoration:underline;flex-shrink:0}footer p{margin:0;text-align:right}.about-prose{max-width:900px;padding:50px 0}.about-prose h1{font-size:52px;margin-bottom:30px}.about-prose p,.about-prose li{font-size:14px;line-height:1.85}.about-prose h2{font-size:29px;margin-top:35px}.about-prose a{text-decoration:underline;overflow-wrap:anywhere}.about-prose li{margin-bottom:10px}.about-prose .credit-note{padding:20px;background:#e9efdf;border:1px solid var(--line);border-radius:10px}
@media(min-width:1600px){.anatomy-scene{height:650px}.explorer{grid-template-columns:230px minmax(400px,1fr) 320px}.learn-panel{padding:30px}.learning-fact p{font-size:12px}}
@media(max-width:1150px){.wrap{width:calc(100% - 48px)}.site-header{padding:18px 24px}.explorer{grid-template-columns:175px minmax(270px,1fr)}.learn-panel{grid-column:1/-1;display:grid;grid-template-columns:1fr 1.3fr;column-gap:35px}.learn-panel .eyebrow,.learn-panel h2,.learn-panel>.serif-note,.learn-panel>p,.learn-panel>.solid-button,.source-details{grid-column:1}.learn-panel #learning-facts{grid-column:2;grid-row:1/7}.learn-panel>.solid-button{max-width:300px}.anatomy-scene{height:530px}.story-section{gap:40px}.story-heading h2{font-size:36px}}
@media(max-width:760px){.wrap{width:calc(100% - 32px)}.prototype-bar{font-size:9px;gap:9px;padding:8px 12px;flex-wrap:wrap}.prototype-bar>span{font-size:8px}.prototype-bar a{margin-left:0}.site-header{padding:15px 16px;gap:20px;flex-wrap:wrap}.wordmark>span:last-child{font-size:8px}.brand-orbit{font-size:34px;width:60px}.site-header nav{order:3;width:100%;justify-content:center;gap:30px;border-top:1px solid var(--line);padding-top:8px;font-size:11px}.header-small{font-size:10px;padding:10px 13px}.header-small span{padding-left:7px}.intro{padding:30px 0 25px;gap:20px;display:block}.intro h1{font-size:51px}.intro-copy{font-size:13px;margin-top:20px}.intro-copy p{margin:0 0 10px}.eyebrow{font-size:9px;letter-spacing:1.4px}.explorer{display:flex;flex-direction:column;gap:17px}.region-panel{padding:0}.region-panel>.eyebrow{margin-bottom:10px}.region-choices{flex-direction:row;gap:6px}.region-choices button{flex:1;padding:14px 9px;gap:5px;border:1px solid var(--line);border-radius:11px;justify-content:center}.region-choices b{font-size:11px}.region-choices small,.region-choices .choice-number,.region-choices button>span:last-child{display:none}.tour-card{display:flex;align-items:center;gap:12px;margin:10px 0 0;padding:0;border:0}.tour-mark,.tour-card h2,.tour-card>p,.quiet-note{display:none}.tour-card .text-button{font-size:10px}.tour-card #tour-progress{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.tour-card #tour-progress p{font-size:10px}.scene-toolbar{padding:14px 12px 0}.anatomy-scene{height:440px}.scene-footer{flex-wrap:wrap;gap:3px;margin:0 12px}.scene-footer>span{padding-left:8px}.scene-selection{left:17px;top:23px}.learn-panel{display:block;padding:25px}.learn-panel h2{font-size:34px}.learn-panel>p:not(.eyebrow):not(.serif-note):not(.small-note),.learning-fact p{font-size:13px}.learning-fact h3{font-size:14px}.source-details{font-size:12px}.safety-wrap summary{padding:16px;gap:12px}.safety-wrap b{font-size:11px}.safety-content{grid-template-columns:1fr;gap:10px;padding:10px 20px 20px}.story-section{grid-template-columns:1fr;gap:25px;padding:55px 0 40px}.story-heading{position:static}.story-heading h2{font-size:37px}.story-form{padding:22px}.form-pair{gap:12px}label{font-size:12px}input,select,textarea{font-size:16px}.form-pair:has(textarea){grid-template-columns:1fr}.warning-fieldset{padding:14px}.warning-fieldset p{font-size:12px}.check-label{font-size:12px}.worksheet{padding:22px}.worksheet-brand{font-size:8px;letter-spacing:.6px}.worksheet dl{grid-template-columns:1fr;gap:5px}.worksheet dd{margin-bottom:14px}.worksheet h2{font-size:30px}.worksheet-tools .button-row{align-items:stretch}.worksheet-tools .button-row>*{flex-grow:1}.bridge{flex-direction:column;align-items:start;gap:15px}.bridge h2{font-size:28px}footer{flex-direction:column;gap:12px}footer p{text-align:left}.about-prose h1{font-size:41px}.scene-panel{border-radius:18px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}
@media print{body{background:white;color:#222}body>*:not(main),main>*:not(.worksheet-section),.worksheet-tools,.skip{display:none!important}.worksheet-section{display:block!important;width:100%;margin:0;padding:0}.worksheet{border:0;padding:0;max-width:none}.worksheet h2{font-size:24px}.worksheet p,.worksheet li,.worksheet dl{font-size:11px}.worksheet .guidance-box{break-inside:avoid}.worksheet dl{grid-template-columns:145px 1fr}.worksheet-brand{font-size:9px}.diary-table{break-inside:avoid}.diary-table td{height:32px}.worksheet-brand span{color:#333}}

.reference-view{position:absolute;inset:0;overflow:hidden;display:grid;place-items:center}.reference-image{position:absolute;inset:0;height:100%;width:100%;object-fit:contain;padding:10px;transition:transform .6s ease;transform-origin:50% 50%}.reference-view[data-focus="shoulder"] .reference-image{transform:translateY(35%) scale(2.6);transform-origin:50% 28%}.reference-view[data-focus="back"] .reference-image{transform:scale(2.8);transform-origin:50% 46%}.reference-view[data-focus="knee"] .reference-image{transform:translateY(-24%) scale(2.6);transform-origin:50% 72%}.reference-notice{position:absolute;bottom:10px;right:15px;max-width:195px;font-size:10px;color:#536b4c;line-height:1.5;text-align:right;background:#e5ecdcdc;padding:6px 9px;border-radius:8px;pointer-events:none}@media(prefers-reduced-motion:reduce){.reference-image{transition:none}}