:root{--ink:#14212b;--muted:#63717c;--paper:#f5f2ea;--card:#fffdf8;--line:#d9d5ca;--orange:#e76f37;--orange2:#fff0e7;--blue:#2878a5;--blue2:#e8f4fa;--green:#398066;--green2:#e9f5ef;--violet:#7664b5;--violet2:#f0edfa;--red:#b8524d;--nav:#17252e;--shadow:0 12px 36px rgba(31,44,52,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Pretendard","Noto Sans KR",sans-serif;line-height:1.72}a{color:var(--blue);text-decoration:none}code{font-family:"SFMono-Regular",Consolas,monospace;font-size:.9em;background:#ece9e1;padding:.12rem .35rem;border-radius:5px}.wrap{max-width:1100px;margin:auto;padding:0 28px 80px}.sitebar{background:var(--nav);color:#fff}.sitebar .inner{max-width:1100px;margin:auto;padding:14px 28px;display:flex;align-items:center;gap:20px}.brand{font-weight:800;color:#fff;margin-right:auto}.sitebar nav{display:flex;gap:6px;flex-wrap:wrap}.sitebar nav a{color:#bfcdd3;padding:6px 9px;border-radius:7px;font-size:.8rem}.sitebar nav a:hover,.sitebar nav a.current{color:#fff;background:#29404b}.hero{padding:64px 0 34px;border-bottom:1px solid var(--line);margin-bottom:28px}.eyebrow{text-transform:uppercase;letter-spacing:.15em;font-size:.73rem;font-weight:800;color:var(--orange)}h1{font-size:clamp(2.2rem,5vw,4.3rem);line-height:1.06;letter-spacing:-.055em;margin:.45rem 0 1.1rem}h2{font-size:1.8rem;letter-spacing:-.035em;line-height:1.25;margin:0 0 18px}h3{font-size:1.12rem;margin:25px 0 8px}.lead{font-size:1.1rem;color:#42535e;max-width:790px}.chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:20px}.chip{border:1px solid var(--line);background:var(--card);padding:5px 10px;border-radius:999px;font-size:.78rem;color:#52616a}.chapter{scroll-margin-top:20px;background:var(--card);border:1px solid var(--line);border-radius:20px;padding:30px;margin:24px 0;box-shadow:0 4px 18px rgba(31,44,52,.035)}.answer{border-left:6px solid var(--orange);background:linear-gradient(135deg,#fffaf4,#fff)}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px}.card.blue{border-top:4px solid var(--blue)}.card.green{border-top:4px solid var(--green)}.card.orange{border-top:4px solid var(--orange)}.card.violet{border-top:4px solid var(--violet)}.kicker{font-size:.71rem;letter-spacing:.09em;text-transform:uppercase;color:var(--muted)}.number{font-size:1.75rem;font-weight:800;letter-spacing:-.04em;margin:3px 0}.card p{font-size:.88rem;color:var(--muted);margin:0}.diagram{margin:20px 0;padding:20px;background:#f1eee6;border:1px solid #dfdbd0;border-radius:16px;overflow-x:auto}.diagram svg{display:block;width:100%;height:auto;min-width:650px}.caption{text-align:center;font-size:.78rem;color:var(--muted);margin-top:8px}.callout{background:var(--blue2);border-left:4px solid var(--blue);border-radius:12px;padding:14px 17px;margin:16px 0}.callout.warn{background:var(--orange2);border-color:var(--orange)}.callout.good{background:var(--green2);border-color:var(--green)}.callout strong{display:block;margin-bottom:3px}table{width:100%;border-collapse:collapse;font-size:.87rem;margin:16px 0}th{text-align:left;background:#edf0ee;color:#33434c}th,td{padding:11px 12px;border-bottom:1px solid var(--line);vertical-align:top}.steps{counter-reset:s;display:grid;gap:11px}.step{display:grid;grid-template-columns:36px 1fr;gap:11px}.step:before{counter-increment:s;content:counter(s);width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:var(--ink);color:#fff;font-size:.8rem;font-weight:800}.step b{display:block}.barrow{display:grid;grid-template-columns:125px 1fr 74px;gap:10px;align-items:center;margin:9px 0;font-size:.83rem}.track{height:18px;background:#e4e1d9;border-radius:999px;overflow:hidden}.bar{height:100%;border-radius:999px}.bar.o{background:var(--orange)}.bar.b{background:var(--blue)}.bar.g{background:var(--green)}.bar.v{background:var(--violet)}.pager{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:26px}.pager a{display:block;background:var(--nav);color:#fff;border-radius:14px;padding:18px}.pager a:last-child{text-align:right}.pager small{display:block;color:#9db0b9}.toc{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 22px}.toc a{font-size:.8rem;background:#e9e6de;color:#485861;padding:6px 10px;border-radius:999px}.source{font-size:.78rem;color:var(--muted);border-top:1px solid var(--line);padding-top:14px;margin-top:22px}footer{text-align:center;color:var(--muted);font-size:.8rem;padding:30px}.roadmap{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.roadmap a,.roadmap div{padding:17px;border-radius:14px;background:#fff;border:1px solid var(--line);color:var(--ink)}.roadmap b{display:block}.roadmap span{font-size:.78rem;color:var(--muted)}
.equation{overflow-x:auto;margin:17px 0;padding:18px 20px;border-radius:14px;background:#15242d;color:#e7f1f4;font:500 .94rem/1.9 "SFMono-Regular",Consolas,monospace;white-space:pre}.equation .dim{color:#8da3ad}.equation .hi{color:#ffb28b}.equation .ok{color:#91d4b8}.note-grid{display:grid;grid-template-columns:140px 1fr;gap:8px 18px;margin:18px 0}.note-grid dt{font-weight:800}.note-grid dd{margin:0;color:#52616a}
.explain{margin:-7px 0 20px;border:1px solid #cfd9dc;border-radius:12px;background:#f7fbfc;overflow:hidden}.explain summary{cursor:pointer;padding:13px 16px;font-weight:800;color:#245d78;list-style:none}.explain summary::-webkit-details-marker{display:none}.explain summary:before{content:"＋";display:inline-grid;place-items:center;width:22px;height:22px;margin-right:9px;border-radius:50%;background:#dceef5;color:#245d78}.explain[open] summary:before{content:"−"}.explain .body{padding:0 18px 17px;border-top:1px solid #dbe5e8}.explain ol,.explain ul{padding-left:22px}.explain li{margin:7px 0}.plain-math{font-family:"SFMono-Regular",Consolas,monospace;background:#e9f1f3;padding:2px 5px;border-radius:5px}
.worked{margin:16px 0 4px;padding:16px 18px;border-radius:12px;background:#fff;border:1px solid #d9d5ca}.worked h4{margin:0 0 10px;color:#b95023}.calc{overflow-x:auto;white-space:pre;margin:9px 0;padding:14px;border-radius:10px;background:#f3efe7;color:#293943;font:500 .88rem/1.8 "SFMono-Regular",Consolas,monospace}.worked .result{font-weight:800;color:#287056}
.diagram svg text{font-family:-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Noto Sans KR",Arial,sans-serif;text-rendering:geometricPrecision}
.research-rationale{border-left:6px solid var(--blue);background:linear-gradient(135deg,#f8fcfe,#fff)}.research-rationale .rationale-intro{font-size:1.02rem;color:#40535e;max-width:900px}.question-chain{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin:20px 0}.question-chain>div{position:relative;padding:16px;border:1px solid var(--line);border-radius:13px;background:#fff}.question-chain>div:not(:last-child):after{content:"→";position:absolute;right:-12px;top:50%;z-index:2;width:24px;height:24px;display:grid;place-items:center;transform:translateY(-50%);border-radius:50%;background:var(--nav);color:#fff;font-weight:800}.question-chain small{display:block;margin-bottom:5px;color:var(--orange);font-weight:800;letter-spacing:.05em;text-transform:uppercase}.question-chain b{display:block;line-height:1.35;margin-bottom:5px}.question-chain p{margin:0;color:var(--muted);font-size:.84rem}.research-question{margin:16px 0 0;padding:15px 18px;border-radius:12px;background:#17252e;color:#edf5f7}.research-question small{display:block;color:#9ed2e5;font-weight:800}.research-question b{display:block;margin-top:4px;font-size:1.05rem}
/* Tablet and mobile safety net. Many reports contain page-local layouts whose
   original breakpoint was 760px; iPad portrait is commonly 768px wide. These
   shared overrides keep every report inside the viewport without rewriting
   each generated page. */
img,video,canvas{max-width:100%}p,li,dd,td,th,h1,h2,h3,.card,.chapter{overflow-wrap:anywhere}.chapter>*{min-width:0}
@media(max-width:900px){
  body{width:100%;max-width:100%;overflow-x:hidden}
  .sitebar .inner{padding:12px 18px;gap:10px;align-items:flex-start;flex-direction:column}
  .brand{margin:0}.sitebar nav{width:100%;flex-wrap:nowrap;overflow-x:auto;overscroll-behavior-x:contain;-webkit-overflow-scrolling:touch;padding-bottom:4px;scrollbar-width:thin}.sitebar nav a{flex:0 0 auto;white-space:nowrap}
  .wrap{width:100%;max-width:100%;padding:0 18px calc(72px + env(safe-area-inset-bottom))}.hero{padding:42px 0 28px}.chapter{padding:23px;margin:18px 0}
  .grid.three,.roadmap,.question-chain{grid-template-columns:repeat(2,minmax(0,1fr))}
  .metrics,.metric-strip,.flow,.domain,.matrix,.phase-strip,.method-flow{grid-template-columns:repeat(2,minmax(0,1fr))!important}
  .two,.evidence,.policy-flow{grid-template-columns:minmax(0,1fr)!important}
  table{display:block;max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;white-space:nowrap;border-collapse:separate;border-spacing:0}
  table th,table td{white-space:normal;min-width:7.5rem}
  .result-table th,.result-table td{white-space:nowrap;min-width:auto}
  .diagram{max-width:100%;padding:12px;-webkit-overflow-scrolling:touch}.diagram svg{min-width:560px}
  .chart{max-width:100%;overflow:hidden;padding:10px}.chart canvas{height:320px!important}
  .equation,.calc,.formula{max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;font-size:.82rem}
  .downloads a{max-width:100%;overflow-wrap:anywhere}.pager{grid-template-columns:1fr 1fr}
}
@media(max-width:600px){
  .sitebar .inner{padding:10px 12px}.wrap{padding-left:12px;padding-right:12px}.hero{padding-top:30px}h1{font-size:clamp(2rem,11vw,3rem)}h2{font-size:1.45rem}
  .grid,.grid.three,.roadmap,.question-chain,.metrics,.metric-strip,.flow,.domain,.matrix,.phase-strip,.method-flow{grid-template-columns:minmax(0,1fr)!important}
  .question-chain>div:not(:last-child):after{content:"↓";right:18px;top:auto;bottom:-17px}.chapter{padding:17px;border-radius:15px}.pager{grid-template-columns:1fr}.barrow{grid-template-columns:78px minmax(0,1fr) 54px}.note-grid{grid-template-columns:1fr}.diagram svg{min-width:500px}.chart canvas{height:280px!important}
}
@media print{body{background:#fff}.sitebar,.pager{display:none}.wrap{max-width:none;padding:0}.chapter{box-shadow:none;break-inside:avoid}.hero{padding-top:0}}