:root{--bg:#f5f3ee;--paper:#f9f7f3;--ink:#1c1814;--muted:#4a423c;--line:#ded8cd;--green:#00704a;--blue:#7eb5e8;--red:#b31c24;--gold:#f4dc59;font-family:Pretendard,-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Noto Sans KR",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,select,input{font:inherit}button,a,select,input{touch-action:manipulation}button{color:inherit;cursor:pointer}button:disabled{cursor:default;opacity:.5}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #236c9c;outline-offset:4px}a{color:var(--green)}[hidden]{display:none!important}header,main{width:min(1392px,calc(100% - 96px));margin:auto}header{height:88px;display:flex;align-items:center;justify-content:space-between}.wordmark{text-decoration:none;color:var(--ink);font-weight:800;letter-spacing:-.03em}.wordmark span{font-weight:450;letter-spacing:0;margin-left:16px;font-size:13px}.internal{font-size:12px;color:var(--muted)}.intro{display:flex;justify-content:space-between;align-items:end;padding:32px 0 40px;gap:32px}.eyebrow{font-size:11px;letter-spacing:.1em;font-weight:750;text-transform:uppercase;margin:0 0 12px}h1{font-size:clamp(32px,3.3vw,48px);letter-spacing:-.055em;line-height:1.15;margin:0;font-weight:750;word-break:keep-all}.lead{font-size:15px;line-height:1.7;color:var(--muted);margin:0 0 4px;word-break:keep-all}.steps{display:flex;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-bottom:24px}.steps button{flex:1;background:none;border:0;min-height:56px;text-align:left;padding:8px 16px;font-size:13px;border-bottom:3px solid transparent}.steps b{margin-right:8px;color:#72685e;font-weight:500}.steps [aria-current=step]{border-bottom-color:var(--green);font-weight:750}.steps [aria-current=step] b{color:var(--green)}.workbench{display:grid;grid-template-columns:minmax(0,1.618fr) minmax(320px,1fr);gap:24px;align-items:start}.visual{background:var(--bg);border-radius:18px;overflow:hidden;min-width:0}.view-head{padding:24px 24px 0;display:flex;justify-content:space-between;gap:12px;align-items:start}.view-head .eyebrow{color:#585149;margin-bottom:8px}.view-head p{font-size:14px;margin:0;font-weight:650}.view-tools{display:flex;flex-wrap:wrap;gap:4px;justify-content:flex-end}.view-tools button{border:1px solid #b5aea3;padding:8px 12px;min-height:36px;border-radius:999px;font-size:11px;background:transparent;white-space:nowrap}.view-tools [aria-pressed=true]{background:var(--ink);color:var(--paper);border-color:var(--ink)}.viewport{height:330px;position:relative;overflow:hidden}.viewport canvas{display:block;width:100%;height:100%}.model-note{position:absolute;bottom:6px;left:24px;right:16px;font-size:10px;color:#5c534a;pointer-events:none}.hotspot{position:absolute;z-index:2;white-space:nowrap;border:1px solid #8f877c;background:rgba(249,247,243,.97);border-radius:999px;min-height:36px;padding:6px 10px;display:flex;gap:5px;align-items:center;font-size:11px;box-shadow:0 2px 8px #1c181414;transform:translate(-50%,-50%)}.hotspot span{background:var(--ink);color:var(--paper);border-radius:50%;width:18px;height:18px;display:grid;place-items:center;font-size:10px}.hotspot.active{border:2px solid var(--green)}.port-strip{display:flex;flex-wrap:wrap;gap:6px;padding:16px 24px}.port-strip>span{flex-basis:100%;font-size:11px;color:var(--muted);margin-bottom:2px}.port-strip button{border:0;border-bottom:1px solid #a59c90;background:transparent;padding:7px 4px;font-size:12px;min-height:36px}.port-strip button.active{color:var(--green);font-weight:750;border-bottom:2px solid var(--green)}.route{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:16px 24px 8px;font-size:12px;font-weight:650;border-top:1px solid #e5dfd5}.route i{font-size:24px;color:#877f74;font-style:normal}.route i.connected{color:var(--green)}.signal-status{padding:0 24px 24px;margin:0;font-size:12px;line-height:1.6;color:var(--muted)}.inspector{background:var(--paper);padding:8px 8px 0 16px;min-width:0}.step-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.step-heading .eyebrow{color:var(--green);margin:0}.text-button{background:none;border:0;padding:8px 0;min-height:36px;color:var(--muted);font-size:12px;text-decoration:underline;text-underline-offset:4px}h2{font-size:25px;letter-spacing:-.035em;line-height:1.3;margin:0 0 12px;word-break:keep-all}.description{font-size:14px;line-height:1.7;margin:0 0 16px;color:var(--muted);word-break:keep-all}.detail-drawing{height:112px;margin:8px 0 16px;background:#efede7;border-radius:12px;overflow:hidden}.detail-drawing svg{display:block;width:100%;height:100%}.detail-drawing text{font-family:inherit;font-size:12px;fill:var(--ink)}.options{display:grid;gap:8px}.choice{width:100%;padding:12px 16px;min-height:48px;border:1px solid #a79e91;border-radius:12px;background:transparent;text-align:left;font-size:13px;line-height:1.5}.choice[aria-pressed=true]{border:2px solid var(--green);padding:11px 15px;background:#e4eee8}.choice small{display:block;font-size:11px;color:var(--muted);margin-top:2px}.check{display:flex;align-items:flex-start;gap:8px;font-size:13px;line-height:1.6;padding:8px 0;cursor:pointer}.check input{width:20px;height:20px;flex:none;accent-color:var(--green);margin:0 0 0 2px}.settings{display:grid;gap:12px}.settings label{font-size:12px;line-height:1.6;display:block}.settings select,.help select{display:block;max-width:100%;width:100%;border:1px solid #a79e91;background:var(--paper);border-radius:10px;padding:11px 12px;min-height:44px;color:var(--ink);margin-top:4px;font-size:13px}.feedback{font-size:12px;line-height:1.65;min-height:20px;margin:16px 0;color:var(--green);word-break:keep-all}.feedback.warning{color:#8c2020}.step-footer{display:flex;gap:8px;justify-content:space-between;padding-top:16px;border-top:1px solid var(--line)}.primary,.secondary{border-radius:999px;min-height:44px;padding:10px 20px;font-size:13px;border:1px solid #a79e91;background:none}.primary{background:var(--green);border-color:var(--green);color:white;font-weight:650;display:flex;justify-content:space-between;gap:16px}.summary-list{list-style:none;padding:0;margin:0;font-size:13px;line-height:1.7}.summary-list li{margin:8px 0;display:flex;gap:8px}.summary-list b{color:var(--green)}.small{font-size:12px;line-height:1.65;color:var(--muted)}.help{padding:56px 0;display:grid;grid-template-columns:1fr 1.618fr;gap:64px;border-bottom:1px solid var(--line);margin-top:48px;border-top:1px solid var(--line)}.help h2{font-size:25px}.help p{font-size:13px;color:var(--muted);line-height:1.7;max-width:320px}.help-controls{max-width:640px}.help label{font-size:12px;font-weight:650}.help ol{padding-left:22px;font-size:14px;line-height:1.8}.help li{margin:6px 0}.help button{font-size:12px;border:0;border-bottom:1px solid var(--green);color:var(--green);background:none;min-height:32px;padding:4px 0}footer{padding:24px 0 48px;max-width:940px;font-size:12px;line-height:1.8;color:var(--muted)}footer strong{color:var(--ink);margin-right:8px}summary{cursor:pointer;min-height:32px}#fallback{padding:24px 16px;font-size:12px}#fallback svg{width:100%;height:220px}#fallback text{font-size:14px;fill:#1c1814}.no-script{line-height:1.8;padding:24px;background:#f4dc59}
@media(min-width:1000px) and (max-height:760px){header{height:64px}.intro{padding:16px 0 24px}h1{font-size:36px}.steps{margin-bottom:16px}.viewport{height:270px}.view-head{padding-top:16px}.detail-drawing{height:88px}.description{margin-bottom:8px}.step-heading{margin-bottom:8px}.feedback{margin:8px 0}.help{margin-top:32px}}
@media(max-width:960px){header,main{width:calc(100% - 48px)}.intro{padding:24px 0 32px}.intro .lead{max-width:300px}.workbench{grid-template-columns:minmax(0,1.35fr) minmax(280px,1fr);gap:16px}.inspector{padding-left:0}.viewport{height:320px}.view-head{display:block}.view-tools{justify-content:start;margin-top:12px}.help{gap:32px}}
@media(max-width:720px){header,main{width:calc(100% - 32px)}header{height:64px}.wordmark span{display:none}.intro{display:block;padding:16px 0 24px}.intro h1{font-size:34px}.lead{font-size:13px;max-width:none!important;margin-top:16px}.steps{overflow:visible;gap:0}.steps button{padding:8px 2px;text-align:center;font-size:11px;min-height:56px;word-break:keep-all}.steps b{display:block;margin:0 0 3px;font-size:10px}.workbench{display:flex;flex-direction:column;gap:24px}.visual,.inspector{width:100%}.view-head{display:flex;padding:16px 16px 0;gap:8px}.view-head p{font-size:12px}.view-tools{margin-top:0;max-width:100px;gap:4px}.view-tools button{font-size:10px;padding:6px 8px;min-height:32px}.viewport{height:255px}.hotspot{font-size:10px;min-height:32px;padding:5px 7px}.hotspot span{display:none}.port-strip{padding:8px 16px 16px}.route{padding:12px 16px 8px;font-size:11px;gap:4px}.signal-status{padding:0 16px 16px;font-size:11px}.model-note{left:16px;font-size:9px}.inspector{padding:0 4px}.step-heading{margin-bottom:8px}h2{font-size:24px}.detail-drawing{height:112px}.help{grid-template-columns:1fr;gap:24px;padding:32px 0;margin-top:32px}.help h2{font-size:23px}.help p{max-width:none}.help h2 br{display:none}.help ol{font-size:13px}footer{padding-bottom:32px}.primary{flex:1}.description{font-size:14px}.view-head .eyebrow{font-size:9px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

#leaders{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;overflow:visible}#leaders line{stroke:#736e64;stroke-width:1}#leaders circle{fill:#00704a;stroke:#f9f7f3;stroke-width:1}.detail-drawing text[fill="white"]{fill:white}
.model-note{position:static;padding:8px 24px;font-size:11px;background:var(--bg);line-height:1.6}
@media(max-width:720px){.workbench{gap:0}.visual{display:contents}.view-head{order:0;width:100%;background:var(--bg);border-radius:18px 18px 0 0}.viewport{order:1;width:100%;height:220px;background:var(--bg)}.model-note{order:2;width:100%;padding:8px 16px 16px;font-size:10px;border-radius:0 0 18px 18px}.inspector{order:3;margin-top:24px}.port-strip{order:4;width:100%;margin-top:24px;padding:16px 0 8px}.route{order:5;width:100%;padding:12px 0 8px}.signal-status{order:6;width:100%;padding:0 0 8px}.view-tools{flex-direction:row;max-width:100px}.help{margin-top:24px}}