:root{--navy:#082f62;--blue:#096ac9;--ink:#19344f;--muted:#60758c;--line:#d7e1eb;font-family:Inter,"Noto Sans KR","Noto Sans SC",system-ui,-apple-system,sans-serif;font-size:16px;color:var(--ink);background:#eef3f8;line-height:1.55;color-scheme:light}*{box-sizing:border-box}body{margin:0;min-width:320px}button,input,select{font:inherit}button{cursor:pointer;background:#fff;color:var(--ink);border:1px solid #c6d5e4;border-radius:6px;padding:7px 11px;font-size:14px}button:hover{border-color:var(--blue);background:#edf6ff}button.active,button[aria-pressed=true],.primary{background:var(--navy);border-color:var(--navy);color:#fff}button:disabled{opacity:.5;cursor:not-allowed}a{color:var(--blue);text-underline-offset:3px}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,#stage:focus-visible{outline:3px solid #10a5d9;outline-offset:3px}h1,h2,h3,p{margin-top:0}h1{font-size:24px;line-height:1.3;margin-bottom:0;letter-spacing:-.04em}h2{font-size:18px;line-height:1.4;margin-bottom:0}h3{font-size:15px;margin-bottom:10px}p{margin-bottom:12px}.topbar{height:72px;background:var(--navy);padding:0 26px;color:#fff;display:flex;align-items:center;justify-content:space-between;gap:18px}.brand{display:flex;align-items:center;gap:12px;color:white;text-decoration:none;font-size:17px;font-weight:850;letter-spacing:.075em}.brand-mark{border:1px solid #8db7dd;border-radius:8px;width:39px;height:39px;display:grid;place-items:center;font-size:26px;color:#b6edff}.brand small{display:block;font-size:12px;font-weight:500;letter-spacing:.04em;color:#adc9e4}.topbar nav{display:flex;align-items:center;gap:24px;font-size:14px}.topbar nav a{color:#cce5fb;text-decoration:none}.active-page{padding:23px 0 19px;border-bottom:3px solid #67d2ed}main{max-width:1920px;margin:auto;padding:20px 24px}.modelbar{display:flex;align-items:center;gap:32px;margin-bottom:18px}.eyebrow{font-size:12px;font-weight:800;color:var(--blue);letter-spacing:.09em;margin-bottom:4px}.model-tabs{display:flex;gap:4px;border:1px solid #beccdc;background:white;border-radius:9px;padding:4px}.model-tabs button{min-width:140px;display:flex;flex-direction:column;align-items:flex-start;border:0;padding:7px 16px}.model-tabs b{font-size:16px}.model-tabs span{font-size:12px}.model-meta{margin-left:auto;display:flex;flex-direction:column;gap:2px;font-size:13px;color:var(--muted);text-align:right}.model-meta strong{font-size:15px;color:var(--ink)}.model-meta a{font-size:12px}.atlas{display:grid;grid-template-columns:245px minmax(0,1fr) 300px;border:1px solid var(--line);background:white;border-radius:12px;overflow:hidden;box-shadow:0 8px 30px #16395308;min-height:670px}.parts-panel{border-right:1px solid var(--line);display:flex;flex-direction:column;min-width:0}.panel-heading{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:16px 15px 12px}.panel-heading h2{font-size:15px}.panel-heading>span,.panel-heading button{font-size:12px}.panel-heading button{padding:5px 8px}.search-label{padding:0 14px;font-size:12px;color:var(--muted)}.searchbox{display:flex;align-items:center;margin:6px 12px 0;border:1px solid #baccdd;border-radius:6px;background:#f8fbfe;overflow:hidden}.searchbox input{width:100%;min-width:0;border:0;background:none;padding:9px 8px;font-size:14px;color:var(--ink)}.searchbox button{border:0;background:none;padding:4px 8px;font-size:20px}.small{font-size:12px}.muted{color:var(--muted)}#search-status{padding:0 14px;margin:6px 0;min-height:18px}.part-tree{height:485px;overflow:auto;flex:1;min-height:180px;scrollbar-width:thin}.part-group h3{background:#eff4f9;padding:7px 14px;margin:0;font-size:12px;font-weight:750;color:#5c7690;position:sticky;top:0;z-index:1}.part-row{display:grid;grid-template-columns:1fr 27px;align-items:stretch;padding:2px 7px;gap:3px}.part-row.child .part-select{padding-left:18px}.part-select{border:0;text-align:left;background:transparent;display:flex;align-items:center;gap:8px;line-height:1.4;padding:7px 6px;font-size:14px;min-width:0}.part-select .dot{width:9px;height:9px;background:var(--part-color);border:1px solid #7890a433;border-radius:2px;flex:none}.part-text{min-width:0;overflow-wrap:anywhere}.part-number{font-size:11px;color:#65839e;min-width:23px}.part-select.active .part-number{color:#b4ddf7}.visibility{background:transparent;border:0;padding:3px;font-size:15px;color:#7992a9}.visibility.off,.is-hidden .part-select{opacity:.4}.list-footer{display:flex;gap:6px;padding:10px;border-top:1px solid var(--line)}.list-footer button{flex:1;font-size:12px}.viewer-panel{min-width:0;background:#f7fafc;display:flex;flex-direction:column}.viewer-toolbar{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px;border-bottom:1px solid var(--line);background:#fff;flex-wrap:wrap}.view-presets,.view-actions{display:flex;gap:4px}.viewer-toolbar button{font-size:12px;padding:5px 8px;min-height:30px}#stage{position:relative;height:485px;min-height:330px;flex:1;overflow:hidden;background:radial-gradient(ellipse at 45% 32%,#fff 0,#edf3f9 68%,#e1eaf3 100%)}#canvas-host{position:absolute;inset:0}#canvas-host canvas{display:block;width:100%;height:100%;touch-action:none}.stage-badge{position:absolute;z-index:2;left:15px;top:13px;pointer-events:none}.stage-badge span{display:block;font-size:11px;color:#47708e;font-weight:800;letter-spacing:.1em}.stage-badge small{font-size:11px;color:#7a8fa3}.stage-hint{position:absolute;bottom:13px;left:15px;font-size:11px;color:#627d95;pointer-events:none}.orientation{position:absolute;right:13px;bottom:12px;text-align:right;pointer-events:none}.orientation b{display:block;font-size:12px;color:#3e6686}.orientation span{font-size:10px;color:#7f96aa}#stage-status{position:absolute;left:10%;right:10%;top:43%;text-align:center;background:#fffffff0;border:1px solid #d4dfeb;padding:18px;border-radius:9px;font-size:14px}#selection-label{position:absolute;z-index:3;transform:translate(-50%,-115%);pointer-events:none;white-space:nowrap;max-width:95%;text-overflow:ellipsis;overflow:hidden;background:#082f62e8;color:white;border:1px solid #85cbea;border-radius:6px;padding:6px 10px;box-shadow:0 3px 12px #153f6530;font-size:13px}.layer-controls{display:grid;grid-template-columns:1fr 1fr;gap:24px;padding:14px 17px;background:#fff;border-top:1px solid var(--line)}.range-control>div:first-child{display:flex;justify-content:space-between;gap:10px;align-items:center;font-size:14px}.range-control output{font-size:12px;color:var(--blue)}input[type=range]{width:100%;accent-color:var(--blue);cursor:pointer;margin:9px 0 0;height:20px}.range-labels{display:flex;justify-content:space-between;font-size:11px;color:#6d8398}.scene-options{display:flex;align-items:center;gap:12px;padding:10px 14px;border-top:1px solid var(--line);background:#f8fafc;flex-wrap:wrap;font-size:12px}.scene-options label{display:flex;gap:4px;align-items:center;white-space:nowrap}.scene-options input[type=checkbox]{accent-color:var(--blue);width:15px;height:15px}.scene-options button{font-size:12px;padding:4px 7px}.scene-options input[type=range]{width:75px;margin:0}.inspector{border-left:1px solid var(--line);padding-bottom:16px;max-height:800px;overflow:auto;scrollbar-width:thin}.part-heading{display:flex;align-items:flex-start;gap:10px;padding:6px 17px 0}.code{min-width:36px;padding:5px 6px;background:#e2f1fe;border-radius:6px;color:var(--blue);font-size:12px;font-weight:800;text-align:center}.part-heading h2{font-size:19px}.part-heading p{font-size:14px;margin:5px 0 0;color:#526b84}#part-pinyin{font-size:13px;color:#008eaa}.role{padding:0 17px;margin-top:15px;font-size:16px;line-height:1.75}.evidence{margin:0 17px;padding:8px 10px;background:#edf4f9;border-left:3px solid #7399b9;font-size:12px;color:#526f86}.inspector dl{padding:0 17px;margin:16px 0;font-size:14px}.inspector dt{font-weight:700;color:#2d6594;margin-top:13px}.inspector dd{margin:4px 0;color:var(--muted)}.selected-actions{display:flex;flex-direction:column;gap:11px;padding:0 17px;font-size:13px}.primary:hover{background:#0b599f;color:white}.photo-section{padding:16px 17px 0}.photo-section h3{font-size:12px;color:#658098}#part-photo img{width:100%;height:140px;object-fit:contain;border:1px solid var(--line);border-radius:6px;background:white}#part-photo p,#part-photo a{font-size:12px}#part-photo p{color:var(--muted);margin:5px 0}.scope-note{font-size:12px;color:#788b9d;padding:15px 17px 0;margin:0}.principles{margin-top:18px;padding:19px 22px;background:white;border:1px solid var(--line);border-radius:11px}.principle-heading{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:16px}.principle-modes{display:flex;gap:5px}.flow-controls{display:flex;align-items:center;gap:7px;flex-wrap:wrap}.flow-controls label{font-size:13px;display:flex;gap:5px;align-items:center}.flow-controls select{padding:6px;border:1px solid var(--line);border-radius:5px;font-size:13px;background:white}.flow-controls p{flex-basis:100%;font-size:16px;margin:12px 0 3px;color:#355673}.flow-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:12px 0}.flow-step{display:flex;gap:9px;align-items:center;text-align:left;font-size:14px;padding:11px 12px;background:#f5f9fc}.flow-step b{font-size:12px;color:var(--blue)}.flow-step.active b{color:#a0e4fd}.principles>.small{margin-bottom:0}.reference{padding:16px 20px;background:white;border:1px solid var(--line);border-radius:9px;margin-top:18px;font-size:14px}.reference summary{font-weight:750;cursor:pointer}.reference-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px;padding-top:20px}.reference p{font-size:14px;color:var(--muted)}#source-links{display:flex;gap:12px;flex-wrap:wrap;font-size:13px}footer{display:flex;justify-content:space-between;gap:15px;font-size:12px;color:#8295a7;padding:20px 2px}.skip{position:fixed;top:-70px;left:10px;z-index:10;background:white;padding:10px}.skip:focus{top:5px}[hidden]{display:none!important}
@media(min-width:1600px){#stage{height:610px}.part-tree{height:610px}.inspector{max-height:890px}}
@media(max-width:1250px){main{padding:18px 15px}.atlas{grid-template-columns:210px minmax(0,1fr)}.inspector{grid-column:1/-1;border-left:0;border-top:1px solid var(--line);max-height:none;display:grid;grid-template-columns:1fr 1fr}.inspector .panel-heading{grid-column:1/-1}.inspector .part-heading,.inspector .role,.inspector .evidence,.inspector dl{grid-column:1}.inspector .selected-actions{grid-column:2;grid-row:2}.inspector .photo-section{grid-column:2;grid-row:3/6}.inspector .scope-note{grid-column:1/-1}.modelbar{gap:20px}.model-tabs button{min-width:120px}#part-photo img{height:160px}}
@media(max-width:780px){.topbar{padding:0 16px;height:64px}.brand{font-size:14px;gap:8px}.brand small{font-size:10px}.topbar nav{font-size:12px;gap:0}.active-page{display:none}.topbar nav a{max-width:130px;text-align:right}.modelbar{flex-wrap:wrap;gap:12px}.modelbar>div:first-child{flex:1}.model-tabs{flex:1;min-width:260px}.model-tabs button{flex:1;min-width:100px}.model-meta{margin:0;flex:1 0 100%;text-align:left;display:block}.model-meta strong{display:inline-block;margin-right:12px}.model-meta span{font-size:12px}.model-meta a{float:right}.atlas{grid-template-columns:1fr;min-height:0}.viewer-panel{grid-row:1}.parts-panel{border-right:0;border-top:1px solid var(--line);max-height:310px}.part-tree{max-height:155px;display:block}.part-row{display:inline-grid;width:50%;vertical-align:top}.part-group h3{position:static}.panel-heading{padding:12px 15px 8px}.list-footer{padding:7px}.search-label{display:none}#search-status{font-size:11px;margin:3px 0;min-height:0}#stage{height:420px;min-height:350px;flex:none}.layer-controls{gap:18px;padding:12px}.scene-options{gap:8px;padding:9px 10px}.orientation{display:none}.stage-hint{font-size:10px;left:10px}.stage-badge{left:11px;top:10px}.principle-heading{align-items:flex-start;flex-direction:column}.principle-modes{width:100%}.principle-modes button{flex:1}.flow-steps{grid-template-columns:1fr 1fr}.reference-grid{grid-template-columns:1fr;gap:10px}.inspector{display:block}.inspector .role{margin-top:12px}.photo-section{padding-top:17px}#part-photo img{height:180px}.principles{padding:16px}footer{display:block}.view-actions button{padding:5px 7px}}
@media(max-width:430px){main{padding:14px 10px}.modelbar>div:first-child{flex-basis:100%}.modelbar h1{font-size:22px}.model-tabs{min-width:0}.model-meta a{float:none;display:block}.scene-options{gap:7px}.scene-options button{min-height:28px}.layer-controls{gap:14px}.range-control>div:first-child{font-size:13px}#stage{height:365px;min-height:340px}.viewer-toolbar{gap:6px}.viewer-toolbar button{font-size:12px}.part-row{width:100%}.part-tree{max-height:170px}.stage-badge small{font-size:10px}.flow-controls button{font-size:12px;padding:7px 9px}}
.viewer-toolbar button,.scene-options label,.scene-options button{font-size:14px}.stage-badge span,.stage-badge small,.stage-hint,.range-labels,.part-number{font-size:12px}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
.learning-nav{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;margin:0 0 14px;padding:12px 16px;background:#fff;border:1px solid var(--line);border-radius:8px}.learning-steps{display:flex;gap:12px;align-items:center;flex-wrap:wrap;font-size:14px;color:var(--muted)}.learning-steps>span:not(.step-divider){display:flex;align-items:center;gap:7px}.learning-steps b{display:grid;place-items:center;width:25px;height:25px;border-radius:50%;background:#e9f0f6;font-size:13px}.learning-steps .active{font-weight:750;color:var(--navy)}.learning-steps .active b{color:white;background:var(--navy)}.step-divider{color:#9fb0c0}#breadcrumbs{display:flex;align-items:center;gap:7px;flex-wrap:wrap;font-size:14px}#breadcrumbs button{border:0;background:none;padding:4px 0;color:#52728e;text-align:left}#breadcrumbs button[aria-current=page]{color:var(--navy);font-weight:750}.scope-hint{font-size:14px;color:var(--muted);padding:0 15px;margin:0 0 12px;line-height:1.6}.scope-back{margin:0 12px 12px;text-align:left;color:var(--blue);background:#f3f8fc;border-color:#d4e3ef}.atlas{grid-template-columns:260px minmax(0,1fr) 300px}.part-tree{padding:4px 5px 12px}.part-row{grid-template-columns:minmax(0,1fr) 28px;margin:3px 5px;padding:3px 1px;border:1px solid transparent;border-radius:7px}.part-row:has(.part-select.active){border-color:#bed7eb;background:#eef6fd}.part-select{align-items:flex-start;padding:9px 7px}.part-select .dot{margin-top:5px}.part-select .part-text strong{font-size:14px;font-weight:650;display:block}.part-select .part-text small{display:block;font-size:12px;color:#617f96;margin-top:3px}.part-select .part-text em{display:block;font-size:12px;font-style:normal;margin-top:9px;color:#417193}.part-select.active .part-text small,.part-select.active .part-text em{color:#c3def2}.summary-row{margin:6px 5px 12px;border-color:var(--line);background:#f8fbfe}.summary-row .part-select{padding:14px 8px;min-height:102px}.summary-row .part-select .part-text strong{font-size:17px}.row-actions{display:flex;align-items:center;justify-content:center;flex-direction:column;gap:2px}.drill-button{font-size:25px;font-weight:500;padding:0 7px;border:0;background:transparent;color:var(--blue);line-height:1.5}.visibility{min-height:27px}.empty-search{padding:15px;font-size:14px}.list-footer button{font-size:14px}.panel-heading h2{font-size:16px}.search-label{font-size:14px}.panel-heading>span{flex:none}#part-labels{position:absolute;inset:0;pointer-events:none;z-index:3}.map-label{position:absolute;transform:translate(-50%,-50%);pointer-events:auto;border:1px solid #b4c9db;box-shadow:0 2px 9px #24446312;background:#fffffff2;padding:6px 9px;max-width:185px;line-height:1.35;font-size:13px;text-align:left;display:flex;align-items:center;gap:6px}.map-label i{flex:none;width:7px;height:7px;border-radius:50%;background:var(--part-color)}.map-label.active{border-color:#76b0d8}.advanced-controls{border-top:1px solid var(--line);background:#fff}.advanced-controls summary{cursor:pointer;font-size:14px;color:#52758f;padding:10px 15px}.advanced-controls .scene-options{border-top:0}.inspector .scope-hint{font-size:13px}.orientation span{display:none}.stage-hint{max-width:80%;font-size:12px}.selected-actions .primary{padding:11px 10px}.inspector .selected-actions a{font-size:14px}.layer-controls{grid-template-columns:1fr 1.15fr}.range-control output{font-size:14px}
@media(max-width:1250px){.atlas{grid-template-columns:240px minmax(0,1fr)}.inspector #selection-instruction{grid-column:1/-1}.inspector .selected-actions{grid-row:3}.inspector .photo-section{grid-row:4/7}}
@media(max-width:780px){.atlas{grid-template-columns:1fr}.learning-nav{padding:11px 12px;gap:7px}.learning-steps{gap:8px}.parts-panel{max-height:450px}.part-tree{max-height:220px}.part-row{display:grid;width:auto}.summary-row{display:inline-grid;width:calc(33.333% - 10px);margin:4px 5px;vertical-align:top;grid-template-columns:1fr}.summary-row .row-actions{flex-direction:row;justify-content:space-between;padding:0 8px}.summary-row .part-select{min-height:100px;padding:10px 5px}.summary-row .part-select .part-text strong{font-size:14px}.summary-row .part-select .dot{display:none}.scope-hint{margin-bottom:8px}.scope-back{margin-bottom:6px}#part-photo img{height:180px}.stage-hint{max-width:94%}.map-label{max-width:155px;font-size:12px}.search-label{display:none}}
@media(max-width:430px){.learning-steps{font-size:13px;gap:6px}.learning-steps b{width:23px;height:23px}.summary-row .part-text small{font-size:12px}.summary-row .part-text em{font-size:12px}.summary-row .part-select{min-height:108px}.summary-row .part-select .part-text strong{font-size:14px}.layer-controls{grid-template-columns:1fr;gap:12px}.range-control input{margin-top:4px}.layer-controls .range-control:first-child{display:none}.stage-badge{max-width:80%}#stage{height:410px}.learning-nav{border-radius:7px}}