@charset "UTF-8";
:root{color-scheme:light;--ink:#19313e;--muted:#657b86;--line:#d7e1e5;--teal:#167e79;--nav:#183540;--paper:#f2f5f5;--radius:12px;font-family:"Pretendard","Malgun Gothic","맑은 고딕",sans-serif;font-size:14px;line-height:1.65;color:var(--ink);background:var(--paper)}
*{box-sizing:border-box}body{margin:0;word-break:keep-all;overflow-wrap:normal}button,input,select{font:inherit}button,a,input,select{touch-action:manipulation}button,.button{border:1px solid #c8d6dc;border-radius:7px;background:#fff;color:var(--ink);padding:8px 13px;cursor:pointer;font-weight:600;line-height:1.5}button:hover{border-color:var(--teal);background:#edf8f5}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #e9b463;outline-offset:3px}button:disabled{opacity:.45;cursor:default}button[aria-pressed=true],button.active{background:#e0f1ed;border-color:#43988b;color:#11675f}.primary{background:var(--teal);border-color:var(--teal);color:white}.primary:hover{background:#116c67;color:#fff}a{color:#237a80;text-underline-offset:4px}select,input{max-width:100%;border:1px solid #c7d6dd;border-radius:6px;background:white;padding:8px 10px;color:var(--ink)}input[type=number]{width:100%}input[type=checkbox]{accent-color:var(--teal)}h1,h2,h3,p{margin:0}h1,h2,h3{text-wrap:balance;line-height:1.45}h1{font-size:28px;letter-spacing:-1px}h2{font-size:20px}h3{font-size:16px}p{margin-top:9px}.small,small{font-size:12px;color:var(--muted)}.eyebrow{font-size:10px;font-weight:750;letter-spacing:1.7px;color:var(--teal);margin:0 0 7px}.tag{font-size:12px;color:var(--teal);font-weight:600}.muted{color:var(--muted)}[hidden]{display:none!important}
.app-header{padding:17px 28px;display:flex;align-items:center;gap:20px;background:#fff}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}.brand svg{width:35px;height:35px;stroke:var(--teal);stroke-width:1.7;fill:none}.brand span{display:flex;flex-direction:column}.brand small{font-size:10px;letter-spacing:1px}.brand strong{font-size:18px}.sample-chip{background:#eff4f3;border:1px solid #dce8e5;border-radius:20px;padding:4px 12px;font-size:12px}.header-actions{margin-left:auto;display:flex;align-items:center;gap:15px;font-size:11px;color:var(--muted)}.header-actions button{font-size:12px}.main-nav{display:flex;background:var(--nav);padding:0 24px;gap:4px;flex-wrap:wrap}.main-nav button{background:none;color:#c7d6dc;border:0;border-radius:0;padding:16px 20px;font-weight:500;border-bottom:3px solid transparent}.main-nav button:hover{background:#234652}.main-nav button[aria-current=page]{color:#fff;border-bottom-color:#77d1b6;background:#234652}.main-nav .experience-tab{margin-left:auto;color:#f5d69a}
main{padding:27px 28px 45px;max-width:1800px;margin:auto}#page-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:22px}#page-description{color:var(--muted);font-size:13px}#page-actions,.button-row{display:flex;gap:7px;align-items:center;flex-wrap:wrap}.home-intro{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:27px 32px;display:flex;justify-content:space-between;gap:30px;margin-bottom:20px}.home-intro>div:first-child{max-width:720px}.home-intro h2{font-size:25px;margin-top:7px}.home-intro p{color:var(--muted)}.home-intro .button-row{margin-top:18px}.home-facts{display:flex;align-items:center;gap:35px}.home-facts div{display:flex;flex-direction:column;min-width:60px}.home-facts strong{font-size:29px;font-weight:550}.home-facts span{font-size:12px;color:var(--muted)}
.workspace{border:1px solid #cddce1;border-radius:var(--radius);overflow:hidden;background:white;box-shadow:0 8px 32px #1a394607}.workspace-toolbar{display:flex;align-items:center;gap:14px;padding:12px 15px;border-bottom:1px solid var(--line);flex-wrap:wrap}.sheet-choice{display:flex;align-items:center;gap:9px;margin-right:auto}.sheet-choice label{font-size:12px;color:var(--muted)}.sheet-choice select{width:280px;font-weight:600}.workspace-toolbar button{font-size:12px;padding:7px 11px}.whole-button{border-color:#659b96}.context-tools{padding:9px 15px;display:flex;align-items:center;gap:8px;flex-wrap:wrap;background:#f8fafb;border-bottom:1px solid var(--line);min-height:48px}.context-tools button{font-size:12px;padding:5px 10px}.context-tools label{font-size:12px;display:flex;align-items:center;gap:6px}.context-tools select{font-size:12px;padding:5px 8px}.context-tools .tool-label{font-size:11px;color:var(--muted);margin-right:4px}.canvas-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr) 245px;min-height:490px}.canvas-row[data-layout=plan]{grid-template-columns:minmax(0,1fr) 270px}.canvas-row[data-layout=model]{grid-template-columns:minmax(0,1fr) 270px}.canvas-row[data-layout=plan] #model-panel,.canvas-row[data-layout=model] #plan-panel{display:none}.drawing-panel,.model-panel{display:flex;min-width:0;flex-direction:column}.model-panel{border-left:1px solid var(--line)}.canvas-heading{display:flex;justify-content:space-between;align-items:center;padding:10px 14px;min-height:48px;gap:8px}.canvas-heading h2{font-size:13px;font-weight:600}.canvas-heading span{font-size:10px;color:var(--muted);text-align:right}.canvas-heading button{font-size:10px;padding:3px 7px}.canvas-footer{padding:8px 12px;display:flex;align-items:center;justify-content:space-between;gap:10px;border-top:1px solid var(--line);margin-top:auto;min-height:42px;color:var(--muted);font-size:10px}.canvas-footer button{font-size:10px;padding:3px 7px}#three-host,#plan-host{height:460px;position:relative;overflow:hidden;min-width:0}#three-host canvas{width:100%;height:100%;display:block;touch-action:none}#plan-host{background:#f8fafb;display:flex;align-items:stretch;touch-action:none}#plan-host svg{width:100%;height:100%;user-select:none}#plan-host [data-element],#plan-host [data-circuit]{cursor:pointer}#plan-host [data-element]:hover{stroke:#ef963a;stroke-width:3px}#plan-host text{pointer-events:none}.scene-label{position:absolute;top:14px;left:14px;font-size:10px;color:#2e525b;background:#ffffffb8;padding:5px 10px;border-radius:4px;pointer-events:none;z-index:1}.inspector{border-left:1px solid var(--line);padding:18px 17px;background:#fff;max-height:550px;overflow:auto}.inspector h2{font-size:18px}.inspector p{font-size:12px;color:var(--muted)}.inspector dl{display:grid;grid-template-columns:1fr 1fr;font-size:12px;gap:7px 10px;margin:18px 0}.inspector dt{color:var(--muted)}.inspector dd{margin:0;text-align:right;font-weight:600}.inspector button{font-size:12px;padding:6px 10px}.inspector .button-row{margin-top:14px}.inspector label{display:block;font-size:12px;margin-top:10px}.inspector input{margin-top:5px}.inspector .form-row{display:grid;grid-template-columns:1fr 1fr;gap:8px}.selection-id{font-size:10px;color:#81949d;margin-top:5px;overflow-wrap:anywhere}.workspace-status{padding:10px 14px;display:flex;justify-content:space-between;gap:15px;background:#edf4f3;border-top:1px solid var(--line);font-size:11px;color:#406e69}#selection-sync{color:#738b8b;font-size:10px;white-space:nowrap}.error{color:#a64034!important}.lesson-path{margin-top:25px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.lesson-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}.step-number{color:var(--teal);font-size:12px;font-weight:700}.lesson-card h3{margin-top:7px;font-size:18px}.lesson-card p{color:var(--muted);font-size:13px;min-height:65px}.lesson-card .button-row{margin-top:18px}.lesson-card .complete{font-size:11px;color:var(--teal)}
#page-content{margin-top:22px}.content-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;min-width:0}.card h2{margin-bottom:12px}.card p,.card li{font-size:13px;color:var(--muted)}.card ul{padding-left:20px}.card .button-row{margin-top:15px}.table-scroll{overflow-x:auto;margin-top:12px}table{border-collapse:collapse;width:100%;font-size:12px}th,td{padding:10px 11px;text-align:left;border-bottom:1px solid #e4ebed}th{background:#f3f7f7;font-size:11px;color:#53717d;white-space:nowrap}td{line-height:1.6}.number{font-variant-numeric:tabular-nums;white-space:nowrap}.circuit-color{height:3px;width:30px;display:block;margin-bottom:6px}.good{color:#197d69}.needs-work{color:#b65435}.formula{background:#edf4f5;padding:14px 18px;border-radius:8px;margin-top:12px;font-family:inherit;line-height:1.9;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}.result-row{display:flex;gap:24px;flex-wrap:wrap;padding:15px 0}.result-row strong{font-size:25px;display:block}.result-row span{font-size:11px;color:var(--muted)}.calc-controls{display:flex;gap:15px;align-items:end;flex-wrap:wrap;margin:15px 0}.calc-controls label{font-size:12px;width:145px}.calc-controls input,.calc-controls select{display:block;width:100%;margin-top:5px}.calc-note{padding:15px;border-left:3px solid #6ba897;background:#edf5f2;font-size:12px;line-height:1.85}.report-actions{display:flex;gap:8px;margin-bottom:20px}.glossary-search{display:flex;gap:15px;margin-bottom:20px;align-items:center}.glossary-search input{width:min(520px,100%)}.glossary-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.term-card{padding:23px;background:white;border:1px solid var(--line);border-radius:12px}.term-card h2{font-size:19px}.term-card h3{color:var(--teal);font-size:14px;margin-top:8px}.term-card p{font-size:13px;color:var(--muted)}.term-card .electrical-note{font-size:12px;color:#365f65;background:#eef5f5;padding:10px;border-radius:6px;margin:12px 0}.term-card button{font-size:12px}
.walk-tools{padding:14px;display:flex;gap:15px;justify-content:space-between;align-items:center;flex-wrap:wrap;background:#1b333f;color:white}.walk-tools p{font-size:12px;color:#c2d3da;margin:0}.walk-tools .button-row button{background:#304c58;color:#fff;border-color:#486370}.walk-tools .switch-on{background:#806333!important;border-color:#d0a963!important}.walk-tools .move-buttons{display:flex;gap:6px;flex-wrap:wrap}#walk-crosshair{position:absolute;left:calc(50% - 14px);top:calc(50% - 14px);pointer-events:none;z-index:2}.switch-bank{display:flex;gap:10px;flex-wrap:wrap}.switch-bank button{padding:10px 16px}.switch-bank button[aria-pressed=true]{background:#fff0cd;border-color:#d6a64c;color:#76581f}details{margin-top:12px}summary{cursor:pointer;font-size:13px;font-weight:600}footer{padding:22px 28px;border-top:1px solid var(--line);display:flex;gap:20px;justify-content:space-between;font-size:11px;color:var(--muted)}footer>div{display:flex;gap:18px;flex-wrap:wrap}dialog{border:1px solid var(--line);border-radius:16px;padding:28px;max-width:520px;width:calc(100% - 36px);box-shadow:0 24px 80px #102f4140;color:var(--ink)}dialog::backdrop{background:#172e3a90}dialog .button-row{margin-top:22px}dialog p{color:var(--muted)}dialog>button{margin-top:18px}
#app[data-page=home] .workspace-toolbar,#app[data-page=home] .context-tools,#app[data-page=home] #inspector,#app[data-page=home] #plan-panel{display:none}#app[data-page=home] .canvas-row{grid-template-columns:1fr}#app[data-page=home] #three-host{height:430px}#app[data-page=experience] #three-host{height:clamp(340px,calc(100dvh - 600px),580px)}#app[data-page=experience] #inspector{max-height:550px}
@media(min-width:1500px){#three-host,#plan-host{height:550px}.inspector{max-height:640px}}
@media(max-width:1100px){.canvas-row{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}.inspector{grid-column:1/-1;border-left:0;border-top:1px solid var(--line);max-height:none}.inspector dl{grid-template-columns:repeat(4,1fr)}.canvas-row[data-layout=plan],.canvas-row[data-layout=model]{grid-template-columns:1fr}.main-nav button{padding:14px 13px}#three-host,#plan-host{height:390px}.home-facts{gap:17px}.glossary-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:800px){.app-header{padding:14px 18px;gap:12px}.header-actions #save-state{display:none}.sample-chip{font-size:10px}.main-nav{padding:0 10px;gap:0}.main-nav button{font-size:12px;padding:12px 13px}.main-nav .experience-tab{margin-left:0}main{padding:22px 18px}h1{font-size:25px}#page-heading{align-items:flex-start}.home-intro{padding:22px;display:block}.home-facts{margin-top:20px;gap:35px}.home-facts strong{font-size:24px}.lesson-path{grid-template-columns:repeat(2,minmax(0,1fr))}.content-grid{grid-template-columns:1fr}.sheet-choice{width:100%}.sheet-choice select{flex:1}.canvas-row{grid-template-columns:1fr}.model-panel{border-left:0;border-top:1px solid var(--line)}#three-host,#plan-host{height:420px}.workspace-toolbar{gap:10px}.inspector dl{grid-template-columns:1fr 1fr}.workspace-status{display:block}#selection-sync{display:block;margin-top:4px}footer{padding:20px 18px;flex-direction:column}.canvas-heading{padding:10px 12px}}
@media(max-width:460px){.app-header{flex-wrap:wrap;padding:12px 14px;gap:8px}.brand strong{font-size:16px}.brand svg{width:29px}.sample-chip{margin-left:auto}.header-actions{display:none}.main-nav button{padding:11px 9px;font-size:12px}.main-nav{padding:0 5px}main{padding:20px 12px 30px}h1{font-size:23px;letter-spacing:-.8px}#page-heading{display:block}.home-intro{padding:20px}.home-intro h2{font-size:22px}.home-facts{justify-content:space-between;gap:10px}.home-facts strong{font-size:23px}.lesson-path,.glossary-grid{grid-template-columns:1fr}.lesson-card{padding:20px}.lesson-card p{min-height:0}.sheet-choice select{min-width:0;width:220px;font-size:12px}.workspace-toolbar{padding:10px}.workspace-toolbar .button-row{gap:4px}.workspace-toolbar button{font-size:11px;padding:7px 8px}.context-tools{padding:10px;gap:6px}.context-tools button{font-size:11px}#three-host,#plan-host{height:340px}#app[data-page=experience] #three-host{height:430px}.canvas-footer{flex-wrap:wrap}.card{padding:20px}.glossary-search{display:block}.glossary-search input{width:100%}.glossary-search span{display:block;margin-top:8px}.walk-tools{padding:12px}.walk-tools button{font-size:11px}.result-row{gap:20px}.report-actions{flex-wrap:wrap}.calc-controls label{width:calc(50% - 10px)}#page-actions{margin-top:12px}}
@media print{.app-header,.main-nav,#workspace,#home-intro,#lesson-path,footer,.report-actions,#page-actions,button,.calc-controls{display:none!important}main{padding:0;max-width:none}body{background:white}.card{break-inside:avoid;border-color:#aaa}.content-grid{display:block}.card+.card{margin-top:20px}h1{font-size:24px}#page-content{margin:0}}
@media(max-width:460px){.header-actions{display:flex}.header-actions button{font-size:11px;padding:5px 9px}}
.render-dialog{max-width:1000px}.render-dialog img{display:block;width:100%;max-height:65vh;object-fit:contain;margin-top:16px;border-radius:8px}.render-dialog .button{text-decoration:none}
.card p{line-height:1.85}.card p+.switch-bank{margin-top:20px}.switch-bank+.button-row{margin-top:18px}.card p+p{margin-top:14px}.spaced{margin-top:20px}.spatial-note{padding:18px 22px;background:#edf6f3;border-bottom:1px solid #bfd9ce;font-size:13px;line-height:1.8}.spatial-note strong,.spatial-note span{display:block}.spatial-note span{margin-top:8px;max-width:1050px}.spatial-note .button-row{margin-top:13px}.main-nav button{padding-inline:15px}.fire-state{margin-top:20px;padding:16px;border-radius:8px;background:#eaf3ef;border-left:4px solid #448d73}.fire-state.is-alarm{background:#fff0e7;border-left-color:#c75537}.fire-state strong{font-size:18px}.device-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;margin:16px 0}.device-list button{text-align:left;font-size:12px}.device-list strong{display:block;color:#a24932}.material-layer-list{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px;margin-top:18px}.material-layer-list button{text-align:left;padding:16px}.material-layer-list span{display:block;margin-top:10px;font-size:12px;font-weight:400;color:var(--muted)}.inspection-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-top:20px}.inspection-card h2{font-size:19px}.inspection-card label{display:block;margin-top:16px;font-size:13px}.inspection-card select,.inspection-card textarea{display:block;width:100%;margin-top:7px}.inspection-card textarea{font:inherit;color:var(--ink);padding:10px;border:1px solid var(--line);border-radius:6px;resize:vertical;line-height:1.8}.inspection-card a{font-size:12px}.check-summary{margin-top:15px;padding:13px;background:#eef5f4;border-radius:6px}#app[data-page=home] .spatial-note{display:none}
@media(max-width:1100px){.main-nav button{padding-inline:12px}.material-layer-list{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:768px){.inspection-grid{grid-template-columns:1fr}.material-layer-list{grid-template-columns:repeat(2,minmax(0,1fr))}.main-nav button{padding-inline:11px}.spatial-note{padding:16px}}
@media(max-width:460px){.material-layer-list{grid-template-columns:1fr}.device-list{grid-template-columns:1fr}.main-nav button{padding-inline:9px}}
.card > p + button{margin-top:20px}
.loading-state{margin:18px 0;padding:22px;border:1px solid var(--line);border-radius:12px;background:white;line-height:1.8}.loading-state strong{font-size:18px}.loading-state p{margin:8px 0 14px}.loading-state progress{width:min(420px,100%);accent-color:var(--teal)}.loading-state .button-row{margin-top:15px}.home-preview{margin-top:20px;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:white;display:grid;grid-template-columns:minmax(0,1.5fr) minmax(250px,1fr)}.home-preview img{width:100%;height:100%;min-height:240px;object-fit:cover}.home-preview>div{padding:28px;align-self:center}.home-preview strong{font-size:21px}.home-preview p{line-height:1.85;margin:12px 0 20px}@media(max-width:800px){.home-preview{grid-template-columns:1fr}.home-preview img{min-height:0;height:auto}.home-preview>div{padding:20px}}
.plan-loading{padding:28px;line-height:1.8;color:var(--muted)}.plan-loading button{display:block;margin-top:16px}