:root{color-scheme:light;--paper:#f5f2e9;--ink:#233831;--muted:#637168;--line:#d5dbce;--accent:#8c4837;--canvas:#e5e9df}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:system-ui,-apple-system,BlinkMacSystemFont,sans-serif;font-size:14px;line-height:1.5}a{color:inherit;text-underline-offset:4px}button,select,input{font:inherit}button{color:inherit;background:transparent;border:1px solid var(--line);padding:8px 12px;border-radius:4px;cursor:pointer}button:hover{background:#e5e8dc}button[aria-pressed=true]{background:var(--ink);border-color:var(--ink);color:var(--paper)}button:disabled{opacity:.4;cursor:default}button:focus-visible,select:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #bd7750;outline-offset:3px}header{display:flex;justify-content:space-between;gap:20px;align-items:center;padding:22px 4vw;border-bottom:1px solid var(--line);font-size:12px}.wordmark{text-decoration:none;font-weight:650;letter-spacing:.13em}.wordmark span{font-weight:400;color:var(--muted)}main{max-width:1660px;margin:auto;padding:0 4vw}.intro{display:flex;justify-content:space-between;gap:50px;align-items:flex-end;padding:40px 0 28px}.intro h1{font-family:Georgia,serif;font-size:clamp(34px,4vw,56px);line-height:1.06;font-weight:400;letter-spacing:-.025em;margin:10px 0}.intro>p{max-width:430px;color:var(--muted);font-size:16px;margin-bottom:10px}.eyebrow{font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);font-weight:600;margin:0 0 7px}#models{display:grid;grid-template-columns:repeat(6,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}#models button{border:0;border-radius:0;text-align:left;padding:16px 14px;display:flex;flex-direction:column;justify-content:space-between;gap:8px;font-size:13px}#models button span{font-size:10px;letter-spacing:.1em;opacity:.65}.study-head{display:flex;justify-content:space-between;gap:20px;align-items:center;margin:26px 0 20px}.study-head h2{font-family:Georgia,serif;font-weight:400;font-size:28px;margin:0}.study-head p:not(.eyebrow){margin:4px 0 0;color:var(--muted)}.status{text-align:right;color:var(--accent);font-size:12px;line-height:1.5}.status small{color:var(--muted)}.workbench{display:grid;grid-template-columns:minmax(0,1fr) 318px;border:1px solid var(--line);border-radius:5px;overflow:hidden}.viewer{min-width:0;border-right:1px solid var(--line)}.modes{display:flex;gap:5px;flex-wrap:wrap;padding:12px;background:#eeefe5;border-bottom:1px solid var(--line)}.modes button{font-size:12px;padding:7px 10px}.viewport{height:540px;position:relative;background:var(--canvas)}canvas{display:block;width:100%;height:100%;touch-action:none}#scene-note{position:absolute;left:18px;bottom:14px;pointer-events:none;font-size:11px;max-width:70%;color:#425548;background:#e5e9dfe6;padding:4px 7px;border-radius:3px}#error{position:absolute;left:20px;top:20px;right:20px;background:#fff0e4;border:1px solid var(--accent);padding:15px}.view-tools{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;padding:8px 12px;border-top:1px solid var(--line)}.view-tools>div{display:flex;gap:4px;flex-wrap:wrap}.view-tools button{font-size:11px;border:0;padding:6px 8px}.control-panel{padding:14px 20px 17px;border-top:1px solid var(--line);min-height:116px}.control-panel p{margin:7px 0 0;font-size:11px;color:var(--muted)}.control-heading{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:8px}.control-heading button{font-size:12px}.control-panel output{color:var(--accent);margin-left:10px;font-variant-numeric:tabular-nums}.control-panel label{font-size:12px}.control-panel input[type=range]{width:100%;accent-color:var(--ink)}.control-panel select{padding:6px;max-width:100%;background:var(--paper);border:1px solid var(--line);border-radius:4px;color:var(--ink);margin:0 10px 8px 0}.control-panel a{font-size:12px}aside{padding:14px 18px;min-width:0}.aside-tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);padding-bottom:13px;margin-bottom:18px}.aside-tabs button{font-size:12px;flex:1;padding:7px 6px}aside p{font-size:12px}aside h3{font-size:14px;line-height:1.35;font-weight:600}#steps{list-style:none;padding:0;margin:0 0 22px;counter-reset:steps}#steps li{counter-increment:steps}#steps button{display:flex;gap:12px;text-align:left;border:0;border-bottom:1px solid var(--line);border-radius:0;width:100%;font-size:12px;padding:11px 9px}#steps button::before{content:counter(steps,decimal-leading-zero);font-size:10px;opacity:.7;padding-top:2px}.instruction{border-top:2px solid var(--ink);padding-top:8px}.instruction .check{border-left:2px solid #ad7d4d;padding-left:12px;color:#766044}.small,.credit{color:var(--muted);font-size:11px!important}#reference-image{width:100%;max-height:250px;object-fit:contain;background:#e6e8df}#selection{border-top:1px solid var(--line);margin-top:18px;padding:12px 0;font-size:11px;color:var(--muted);min-height:52px}.download{display:block;text-align:center;text-decoration:none;font-size:12px;padding:10px 5px;border:1px solid var(--ink);border-radius:4px;margin:10px 0}#parts{max-height:500px;overflow:auto}#parts button{display:grid;grid-template-columns:10px 1fr;column-gap:9px;width:100%;text-align:left;border:0;border-bottom:1px solid var(--line);border-radius:0;font-size:12px;padding:9px 0}#parts i{height:8px;width:8px;border-radius:50%;margin-top:6px}#parts small{grid-column:2;color:var(--muted);font-size:10px}#parts button[aria-pressed=true]{background:#e3e7da;color:var(--ink)}.verification{display:grid;grid-template-columns:repeat(3,1fr);gap:35px;padding:32px 0;border-bottom:1px solid var(--line)}.verification h3{font-family:Georgia,serif;font-weight:400;font-size:22px;margin:0 0 12px}.verification p,.verification li{font-size:12px;color:var(--muted)}.verification ul{padding-left:16px}.verification li{margin:0 0 8px}.verification a{font-size:12px}footer{display:flex;justify-content:space-between;gap:30px;color:var(--muted);font-size:11px;padding:20px 0 35px}footer p{max-width:620px;margin:0}footer span{white-space:nowrap}[hidden]{display:none!important}@media(min-width:1450px){.viewport{height:620px}}@media(max-width:1050px){main{padding:0 24px}.workbench{grid-template-columns:minmax(0,1fr) 275px}.viewport{height:500px}#models button{font-size:12px;padding:12px 8px}.intro>p{max-width:340px}}@media(max-width:760px){header{padding:17px}.intro{display:block;padding-top:25px}.intro>p{max-width:none;font-size:14px}.intro h1 br{display:none}main{padding:0 14px}#models{grid-template-columns:repeat(3,1fr)}#models button{min-height:74px}.workbench{grid-template-columns:1fr}.viewer{border-right:0}.viewport{height:420px}aside{border-top:1px solid var(--line)}.verification{grid-template-columns:1fr;gap:15px}.study-head{align-items:flex-start}.status{max-width:145px;font-size:10px}.study-head h2{font-size:25px}.modes{gap:3px}.modes button{padding:7px;font-size:11px}footer{display:block}footer span{display:block;margin-top:10px}}
:root .view-tools label{display:flex;align-items:center;gap:5px;font-size:11px;padding:4px 0}#detail-parts{display:flex;flex-wrap:wrap;gap:5px}#detail-parts button{font-size:11px;padding:6px 8px}.reference-next{padding:30px 0;border-bottom:1px solid var(--line)}.reference-next h2{font:400 28px Georgia,serif;margin:0 0 24px}.reference-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px 35px}.reference-grid h3{font-size:15px;margin:0 0 8px}.reference-grid p{font-size:12px;margin:0 0 8px}.reference-grid small{display:block;font-size:11px;color:var(--muted)}@media(max-width:760px){.reference-grid{grid-template-columns:1fr}header{flex-wrap:wrap}}
.collection-toolbar,.collection-footer{display:flex;align-items:center;justify-content:space-between;gap:18px;margin:18px 0}.collection-toolbar p,.collection-footer p{color:var(--muted);font-size:12px}.collection-viewport{height:560px;position:relative;background:var(--canvas);border:1px solid var(--line)}#collection-note{position:absolute;left:18px;bottom:10px;background:var(--canvas);pointer-events:none;font-size:12px}.collection-key{display:grid;grid-template-columns:repeat(3,1fr);gap:12px 24px;color:var(--muted);font-size:12px;margin:20px 0 40px}header nav{display:flex;flex-wrap:wrap;gap:20px}#boot-error{background:#fff0e4;padding:18px;border:1px solid var(--accent);margin:20px 0}.part-chips{display:flex;flex-wrap:wrap;gap:6px;margin:12px 0}.part-chips button{font-size:11px;text-align:left;max-width:100%;padding:5px 8px}#overlap-list{display:grid;gap:7px;max-height:350px;overflow:auto}#overlap-list button{font-size:12px;text-align:left;padding:10px}#overlap-list small{display:block;color:var(--muted)}#review-title{color:var(--accent)}#board-note{border-left:2px solid var(--accent);padding-left:10px}#practice-step{margin-top:8px}.control-panel .part-chips{max-height:120px;overflow:auto}aside{overflow-wrap:anywhere}.eyebrow,#models button span,#parts small,.small,.credit{font-size:11px!important}
@media(max-width:760px){.collection-viewport{height:420px}.collection-key{grid-template-columns:repeat(2,1fr)}.collection-toolbar,.collection-footer{flex-wrap:wrap}.collection-toolbar p{margin:0}.viewport{height:390px}.control-heading{gap:6px}.control-heading button{padding:8px}.view-tools button{min-height:36px}#reference-image{max-height:350px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto}}
body[data-view=study] .intro{padding:18px 0 10px;align-items:center;gap:20px}body[data-view=study] .intro h1{font-size:27px;margin:0}body[data-view=study] .intro h1 br{display:none}body[data-view=study] .intro>p{font-size:12px;max-width:430px}body[data-view=study] .intro .eyebrow{margin-bottom:5px}body[data-view=study] .collection-toolbar{margin:10px 0}body[data-view=study] .study-head{margin:16px 0}.aside-tabs button{min-width:0}@media(max-width:760px){body[data-view=study] .intro>p{display:none}.collection-key{font-size:11px}.status{font-size:11px}}
.aside-tabs button{white-space:nowrap;font-size:11px;padding:7px 4px}@media(pointer:coarse){button,select{min-height:44px}}
.collection-key button{border:0;border-top:1px solid var(--line);text-align:left;font-size:12px;border-radius:0;padding:12px 0}
.collection-footer>div,.assembly-actions,.motion-extras,#selection-actions{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.motion-extras{margin:12px 0}.motion-extras button{font-size:12px}.motion-extras select{margin:0;padding:4px}
#assembly-title{font:400 20px Georgia,serif;margin:12px 0 6px}#assembly-instruction{font-size:13px;max-width:75ch;color:var(--ink)}
.assembly-actions #practice-step{margin:0}.aside-tabs{flex-wrap:wrap}.aside-tabs button{flex:1 0 auto}
#selection-actions button{font-size:11px;padding:6px 8px}#selection-actions{padding-bottom:10px}
#bed-map table{border-collapse:collapse;width:100%;table-layout:fixed;font-size:12px}#bed-map caption{font-size:11px;text-align:left;color:var(--muted);margin-bottom:8px}
#bed-map th,#bed-map td{text-align:center;padding:5px 1px;border-bottom:1px solid var(--line)}#bed-map th{font-size:11px;font-weight:500}
#bed-map button{padding:6px;min-width:30px;border:0;width:100%}#bed-map td button{background:#dfe6d7}#map-selection{border-left:2px solid var(--accent);padding-left:10px}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline-offset:2px}
@media(min-width:1200px){.workbench{grid-template-columns:minmax(0,1fr) 340px}}
@media(max-width:420px){.status{max-width:105px}.study-head h2{font-size:23px}.collection-footer>div{width:100%}.collection-footer>div button{flex:1}.control-panel{padding:12px}.collection-key{grid-template-columns:1fr 1fr}}
.intro{padding:24px 0 14px}.intro h1{font-size:44px}.collection-toolbar{margin:12px 0}.collection-viewport{height:480px}body[data-view=study] .intro{display:none}
@media(min-width:900px){.workbench{overflow:visible;align-items:start}.viewer{position:sticky;top:8px;display:flex;flex-direction:column;max-height:calc(100dvh - 16px)}.viewport{height:360px;flex:1 1 360px;min-height:180px}.modes,.view-tools{flex-shrink:0}.control-panel{flex:0 1 auto;min-height:0;max-height:44vh;overflow-y:auto}.control-panel .part-chips{margin:8px 0;max-height:70px}#assembly-title{font-size:18px;margin:6px 0}.control-panel{padding:10px 16px}.control-heading{margin-bottom:4px}}
@media(min-width:900px){.viewer{max-height:calc(100dvh - 95px)}}
#context-controls{border-bottom:1px solid var(--line);margin-bottom:16px}#context-controls .control-panel{border:0;padding:0 0 16px;max-height:none;overflow:visible}
#context-controls .part-chips{max-height:130px;overflow:auto}#context-controls .control-heading{flex-wrap:wrap}#context-controls #assembly-title{font-size:19px;margin:12px 0}
#context-controls #assembly-instruction{font-size:12px}.motion-extras{gap:5px}.motion-extras label{font-size:11px}
@media(min-width:900px){.viewer{max-height:calc(100dvh - 16px)}.viewport{flex:1 1 520px;height:520px;min-height:260px}.workbench>aside{min-height:680px}.view-tools{padding:8px 10px}.view-tools>div{gap:1px}}