@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;600;700;800;900&display=swap');
:root{font-family:'Noto Sans KR',system-ui,sans-serif;color:#152239;background:#111c30;font-synthesis:none;--ink:#152239;--muted:#596778;--blue:#2557d8;--line:#d7dfE5;--paper:#f7f9fa;--lime:#d3f298;--orange:#d16b35}*{box-sizing:border-box}body{margin:0}button,a,input{touch-action:manipulation}button{font:inherit;cursor:pointer;min-height:44px}a{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #4f8bfd;outline-offset:4px}button:disabled{cursor:default;opacity:.35}button{border:0}button[aria-pressed=true]{font-weight:800}h1,h2,h3,p{margin:0}h1,h2,h3,p,span{word-break:keep-all;overflow-wrap:anywhere}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0)}.skip{position:fixed;top:-100px;z-index:20;padding:16px;background:white;color:black}.skip:focus{top:0}.topbar{height:88px;display:flex;align-items:center;padding:0 34px;gap:32px;color:#f2f6ff;border-bottom:1px solid #314056}.brand{display:flex;gap:12px;align-items:center;text-decoration:none}.brand-sign{background:#d3f298;color:#172835;height:40px;width:40px;display:grid;place-items:center;font-size:26px;font-weight:900;position:relative;border-radius:10px}.brand-sign>span{position:absolute;right:3px;top:1px;font-size:16px}.brand b{font-size:21px;line-height:1.1;letter-spacing:-.6px}.brand b>span{display:block;font-size:10px;letter-spacing:2px;margin-top:6px;font-weight:500}.top-note{font-size:13px;color:#acb9cc}.top-actions{margin-left:auto;display:flex;align-items:center;gap:16px;font-size:12px}.top-actions button{background:transparent;color:#dce7f8;padding:0 12px;border:1px solid #3a4c65;border-radius:6px;font-size:12px}.top-actions a{text-underline-offset:5px}.workspace{max-width:1800px;margin:auto;display:grid;grid-template-columns:234px minmax(0,1fr);min-height:calc(100dvh - 88px)}.rail{padding:36px 18px 24px 26px;display:flex;flex-direction:column;color:#adbed3}.rail-title{font-size:10px;letter-spacing:2px;font-weight:700;color:#93a3bb;margin:0 8px 27px}.rail-title span{display:block;font-size:15px;letter-spacing:-.3px;color:#f0f5ff;margin-top:10px}#chapters{display:grid;gap:5px}#chapters button{display:flex;align-items:center;gap:12px;text-align:left;background:transparent;color:#afbed1;padding:12px 10px;border-radius:7px;font-size:12px;line-height:1.6}#chapters button span{font-size:10px;color:#8397b0;font-variant-numeric:tabular-nums}#chapters button[aria-current=step]{background:#263c5a;color:#fff}#chapters button[aria-current=step] span{color:var(--lime)}.rail-bottom{margin-top:auto;padding:40px 8px 0;font-size:12px}.rail-bottom p{font-size:10px;line-height:1.9;color:#a4b4c9;margin-top:14px}.rail-bottom button{color:#b7c7db;background:none;padding:0;font-size:11px;text-decoration:underline;text-underline-offset:4px}progress{width:100%;height:4px;display:block;margin-top:12px;accent-color:var(--lime)}main{background:var(--paper);min-width:0;padding:28px 42px 0;border-radius:22px 0 0 0;display:flex;flex-direction:column}.page-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;border-bottom:1px solid var(--line);padding-bottom:18px;font-size:11px;font-weight:700;color:var(--blue)}.edition{color:#718091;font-size:9px;letter-spacing:1.4px;font-weight:500}#scene{flex:1;min-height:530px;padding:35px 0 26px;animation:scene-in .4s ease-out}.eyebrow{font-size:11px;font-weight:700;letter-spacing:1.7px;color:var(--blue);display:block;margin-bottom:18px}.headline{font-size:clamp(34px,3.6vw,58px);font-weight:800;line-height:1.3;letter-spacing:-2.6px}.headline em{font-style:normal;color:var(--blue)}.lead{font-size:16px;line-height:1.85;color:var(--muted);max-width:660px;margin-top:21px}.split{display:grid;grid-template-columns:1fr 1.07fr;gap:40px;align-items:center;min-height:475px}.split>div{min-width:0}.callout{border-left:3px solid var(--blue);padding:3px 0 3px 18px;margin-top:26px;font-size:14px;line-height:1.8}.callout strong{display:block;font-weight:700}.callout p{color:var(--muted);font-size:13px}.hero-visual{background:#eaf0f6;border:1px solid #d7e1eb;border-radius:12px;padding:27px;position:relative;overflow:hidden}.visual-label{display:flex;justify-content:space-between;gap:10px;font-size:10px;letter-spacing:1px;color:#65788e;margin-bottom:18px}.mini-label{font-size:11px;letter-spacing:1.4px;font-weight:700;color:#6c7c8f}.hero-big{font-size:76px;font-weight:800;line-height:1.15;letter-spacing:-4px;color:var(--blue)}.hero-big small{font-size:16px;letter-spacing:0;margin-left:8px}.hero-route{width:100%;height:auto;overflow:visible}.hero-route text{font-family:inherit}.hero-foot{display:flex;gap:20px;border-top:1px solid #cbd8e6;padding-top:20px;margin-top:10px}.hero-foot span{font-size:11px;color:#5f7187;flex:1}.hero-foot b{display:block;font-size:19px;color:#203550;margin-bottom:5px}.flow-particle{offset-path:path('M 55 85 C 140 85 155 150 235 150 S 315 65 405 65');animation:journey 6s linear infinite;fill:var(--blue)}.lesson-footer{padding:22px 0;display:flex;justify-content:space-between;gap:18px;align-items:center;border-top:1px solid var(--line)}.lesson-footer>div:first-child{display:flex;align-items:center;gap:20px}#position{font-size:12px;font-weight:700;white-space:nowrap;color:var(--blue);font-variant-numeric:tabular-nums}#lesson-hint{font-size:11px;color:#647183}.pager{display:flex;gap:8px}.pager button{border:1px solid #cdd7e2;background:transparent;border-radius:7px;padding:12px 18px;font-size:12px;color:var(--ink)}.pager #next{background:var(--blue);color:white;border-color:var(--blue);min-width:164px}.section-top{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:26px}.section-top .headline{font-size:clamp(30px,3vw,46px)}.section-top .lead{max-width:370px;margin:0;font-size:14px}.unit-diagram{background:white;border:1px solid var(--line);padding:28px;border-radius:12px}.unit-head{display:flex;justify-content:space-between;align-items:center;font-size:13px;padding-bottom:20px;border-bottom:1px solid var(--line)}.unit-head b{font-size:19px}.box-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:24px}.pack{background:#edf2fc;border:1px solid #c8d5f2;border-radius:5px;padding:16px 8px;text-align:center;font-size:11px;color:#335387;position:relative}.pack span{display:block;width:28px;height:22px;border:1.5px solid #4565a1;margin:0 auto 8px;position:relative}.pack span:after{content:'';position:absolute;left:50%;height:100%;border-left:1px solid #4565a1}.pack.selected{background:#2557d8;color:white;border-color:var(--blue)}.pack.selected span{border-color:white}.pack.selected span:after{border-color:white}.pack.selected:before{content:'추적 단위';position:absolute;top:-10px;left:50%;transform:translateX(-50%);background:var(--lime);color:#24341f;padding:3px 5px;white-space:nowrap;font-size:9px}.unit-equation{display:flex;justify-content:space-between;align-items:center;gap:15px;padding-top:22px;font-size:13px;color:#60718a}.unit-equation strong{font-size:26px;color:var(--ink)}.facts{display:grid;gap:18px;margin-top:25px}.fact{display:grid;grid-template-columns:40px 1fr;gap:14px;align-items:start;font-size:14px;line-height:1.75}.fact>span{border-top:2px solid var(--blue);padding-top:4px;color:var(--blue);font-size:11px}.fact p{font-size:13px;color:var(--muted);margin-top:4px}.stage-tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:24px}.stage-tabs button{flex:1;padding:12px 5px;background:none;border-bottom:3px solid transparent;color:#68798d;font-size:13px}.stage-tabs button[aria-pressed=true]{color:var(--blue);border-color:var(--blue)}.inventory-main{display:grid;grid-template-columns:1fr 1.2fr;gap:36px;align-items:center}.stock-pools{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.stock-pool{padding:22px 15px;border:1px solid #d3dce9;border-radius:8px;background:white}.stock-pool.transit{background:#152b4b;color:white}.stock-pool>span{font-size:13px}.stock-pool>b{display:block;font-size:48px;font-weight:700;letter-spacing:-2px;line-height:1.5;font-variant-numeric:tabular-nums}.stock-pool>b small{font-size:12px;letter-spacing:0;font-weight:400}.stock-track{height:7px;background:#e2e9f3;margin-top:10px;border-radius:5px;overflow:hidden}.stock-track span{display:block;height:100%;background:var(--blue);transition:width .55s ease}.transit .stock-track{background:#385070}.transit .stock-track span{background:var(--lime)}.total{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);margin-top:24px;padding-top:20px;font-size:13px}.total b{font-size:25px}.stage-copy h3{font-size:23px;line-height:1.5}.stage-copy p{font-size:14px;line-height:1.9;color:var(--muted);margin-top:14px}.pill{display:inline-flex;border:1px solid #cedbd0;color:#456336;background:#eaf4df;padding:6px 10px;border-radius:40px;font-size:11px}.note{font-size:11px;color:#607184;line-height:1.8;margin-top:22px}.route-board{background:#e7edf5;padding:24px;border-radius:12px}.journey-modes{display:flex;gap:6px;margin-bottom:22px}.journey-modes button{flex:1;background:white;border:1px solid #c8d2e2;border-radius:5px;font-size:12px;color:#405472}.journey-modes button[aria-pressed=true]{background:var(--blue);border-color:var(--blue);color:white}.route-svg{width:100%;height:150px}.route-svg text{font-family:inherit;fill:#244264;font-size:14px}.route-summary{padding:17px;background:white;border-radius:6px;line-height:1.8;font-size:14px}.route-summary b{display:block}.text-link{display:inline-flex;align-items:center;gap:12px;font-size:13px;color:var(--blue);text-decoration:none;border-bottom:1px solid var(--blue);padding:12px 0;margin-top:18px;min-height:44px}.preview-stack{display:grid;gap:14px}.state-panel{border:1px solid #cad5e3;border-radius:10px;padding:22px;background:white}.state-panel.active{background:#152b4b;color:white}.state-panel .state-tag{font-size:10px;letter-spacing:1px;opacity:.7}.state-panel h3{font-size:22px;margin:12px 0}.state-panel p{font-size:12px;line-height:1.7;color:#69798b}.state-panel.active p{color:#c2d2e8}.state-panel .counts{display:flex;justify-content:space-between;border-top:1px solid #49617e;margin-top:18px;padding-top:18px;font-size:11px;color:#c6d6e8}.counts b{display:block;font-size:28px;color:white;margin-top:4px}.quiet-note{font-size:11px;color:#768496;margin-top:8px}.quiz{margin-top:24px;padding-top:22px;border-top:1px solid var(--line)}.quiz h3{font-size:14px;line-height:1.7;margin-bottom:13px}.answers{display:grid;gap:8px}.answers button{border:1px solid #ccd7e5;background:white;color:#253e5e;border-radius:7px;text-align:left;padding:12px 15px;font-size:13px}.answers button.correct{border-color:#659b41;background:#edf5e5}.answers button.wrong{border-color:#bc6f40;background:#fff0e4}.feedback{font-size:13px;line-height:1.8;color:#405670;margin-top:12px;min-height:24px}.handoff-flow{display:grid;gap:0}.gate{border-left:1px solid #adbed2;padding:0 0 26px 28px;margin-left:16px;position:relative}.gate:last-child{padding-bottom:0}.gate:before{content:attr(data-n);position:absolute;left:-17px;top:0;width:32px;height:32px;display:grid;place-items:center;background:#e6edf7;border:1px solid #bacbe0;border-radius:50%;font-size:10px;color:var(--blue)}.gate h3{font-size:20px;line-height:1.6}.gate p{font-size:13px;line-height:1.8;color:var(--muted);margin-top:7px}.gate:last-child:before{background:var(--blue);color:white}.context-tag{display:inline-block;font-size:10px;border:1px solid #b7c8db;padding:4px 7px;margin-top:11px;color:#43617d}.evidence-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:28px}.chart-panel{background:#fff;border:1px solid #d2dce7;padding:24px;border-radius:10px}.chart-panel h3{font-size:16px}.chart-panel .sub{font-size:11px;color:var(--muted);margin-top:5px}.chart{width:100%;height:auto;margin-top:18px}.chart text{font-family:inherit;fill:#66768a;font-size:10px}.metrics{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:22px}.metric b{font-size:36px;letter-spacing:-1.5px;line-height:1.4}.metric span{display:block;font-size:11px;color:#6b7c8d;margin-top:3px}.metric small{font-size:13px;margin-left:3px}.sync-chain{display:grid;grid-template-columns:1fr 20px 1fr;align-items:center;gap:8px;padding:22px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:24px 0}.sync-chain div{font-size:12px;color:#697b91}.sync-chain b{display:block;font-size:33px;color:var(--ink)}.sync-chain>span{font-size:23px;color:var(--blue)}.role-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px}.role-tabs button{padding:10px 16px;background:white;border:1px solid #cbd6e4;border-radius:6px;color:#597089;font-size:12px}.role-tabs button[aria-pressed=true]{background:var(--blue);color:white;border-color:var(--blue)}.checklist{display:grid;gap:10px}.checklist label{display:flex;align-items:center;gap:13px;border:1px solid #d0dce7;border-radius:7px;padding:16px;min-height:65px;background:white;font-size:14px;line-height:1.7;cursor:pointer}.checklist input{width:20px;height:20px;flex-shrink:0;accent-color:var(--blue)}.readiness{background:#152b4b;color:white;padding:30px;border-radius:12px}.readiness>span{font-size:11px;letter-spacing:1.5px;color:#a8c1df}.readiness .score{font-size:74px;font-weight:700;letter-spacing:-3px;line-height:1.6}.score small{font-size:20px;font-weight:400;letter-spacing:0;color:#91aacc}.readiness h3{font-size:23px;line-height:1.5}.readiness p{font-size:13px;line-height:1.9;color:#c4d3e6;margin-top:15px}.readiness a{display:block;text-align:center;background:var(--lime);padding:15px;border-radius:6px;color:#1b332a;text-decoration:none;font-size:13px;font-weight:700;margin-top:22px}.readiness .secondary{background:transparent;border:1px solid #5c7492;color:#e0ebfb;margin-top:9px}.details{margin-top:23px;border-top:1px solid var(--line);padding-top:16px;font-size:12px;color:#536881}.details summary{cursor:pointer;min-height:44px;display:flex;align-items:center}.details p{line-height:1.9;margin:8px 0}.details a{color:var(--blue)}.error-note{color:#9b4827;font-size:12px}.presenting .rail,.presenting .top-note{display:none}.presenting .workspace{grid-template-columns:1fr}.presenting main{border-radius:0;max-width:1600px;width:100%;margin:auto;padding-left:6vw;padding-right:6vw}.presenting .split{min-height:60dvh}.presenting #scene{padding-top:5vh}.presenting .headline{font-size:clamp(36px,4.5vw,72px)}.presenting .section-top .headline{font-size:clamp(32px,3.5vw,54px)}.reduced *{animation:none!important;transition:none!important;scroll-behavior:auto!important}@keyframes scene-in{from{opacity:.3;transform:translateY(8px)}to{opacity:1;transform:none}}@keyframes journey{0%{offset-distance:0%;opacity:0}8%,90%{opacity:1}100%{offset-distance:100%;opacity:0}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}@media(min-width:1500px){main{padding-left:65px;padding-right:65px}#scene{padding-top:55px}.split{min-height:560px}}@media(max-width:1150px){.top-note,.edition{display:none}.workspace{grid-template-columns:190px minmax(0,1fr)}.rail{padding-left:14px}.rail-title{font-size:9px}main{padding-left:25px;padding-right:25px}.split{gap:24px}.headline{letter-spacing:-1.5px}.inventory-main{grid-template-columns:1fr}.stock-pools{gap:8px}.stock-pool{padding:16px}.evidence-grid{grid-template-columns:1fr}.section-top{align-items:flex-start}.section-top .lead{max-width:260px}.lesson-footer>div:first-child{gap:10px}#lesson-hint{display:none}}@media(max-width:760px){.topbar{height:74px;padding:0 16px;gap:15px}.brand-sign{width:34px;height:34px;font-size:22px}.brand b{font-size:17px}.brand b>span{font-size:8px}.top-actions{gap:8px}.top-actions button{padding:0 8px;font-size:10px}.top-actions a{display:none}.workspace{display:block}.rail{padding:14px 16px 12px}.rail-title,.rail-bottom{display:none}#chapters{display:flex;overflow-x:auto;gap:6px;scrollbar-width:thin;padding-bottom:5px}#chapters button{flex-shrink:0;padding:8px 10px;font-size:11px}#chapters button span{font-size:10px}main{border-radius:18px 18px 0 0;padding:22px 22px 0}.page-heading{font-size:10px;padding-bottom:14px}#scene{padding:27px 0 26px;min-height:0}.split{grid-template-columns:1fr;min-height:0;gap:27px}.headline,.presenting .headline{font-size:36px;letter-spacing:-1.8px;line-height:1.4}.lead{font-size:15px;margin-top:16px}.eyebrow{font-size:10px;margin-bottom:12px}.hero-visual{padding:21px}.hero-big{font-size:62px}.hero-foot{gap:12px}.hero-foot b{font-size:16px}.hero-foot span{font-size:10px}.hero-route{margin:8px 0}.lesson-footer{position:sticky;bottom:0;background:#f7f9af}.lesson-footer{background:#f7f9fa;padding:14px 0 max(14px,env(safe-area-inset-bottom));z-index:2}.pager button{padding:10px 12px}.pager #next{min-width:145px;font-size:11px}.section-top{display:block;margin-bottom:22px}.section-top .lead{max-width:none;margin-top:15px;font-size:14px}.section-top .headline{font-size:31px}.unit-diagram{padding:20px}.box-grid{gap:7px}.pack{font-size:10px;padding:14px 5px}.unit-equation{font-size:11px}.unit-equation strong{font-size:22px}.stage-tabs button{font-size:11px}.stock-pool{padding:15px 10px}.stock-pool>b{font-size:36px}.stock-pool>span{font-size:11px}.stock-pool>b small{font-size:10px}.stage-copy h3{font-size:21px}.chart-panel{padding:18px}.metrics{gap:15px}.metric b{font-size:30px}.role-tabs{gap:5px}.role-tabs button{padding:9px 10px;font-size:11px}.readiness{padding:25px}.presenting main{padding:22px}.presenting .split{min-height:0}.presenting #scene{padding-top:26px}}