:root{--paper:#edf2fa;--white:#fff;--ink:#14264a;--muted:#50617e;--blue:#2359be;--blue-dark:#174493;--sky:#dce8fb;--cyan:#99ecf3;--coral:#ed725f;--line:#bdcbe0;--danger:#a52f2f;--sans:-apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", sans-serif;--mono:ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--paper);min-width:320px;color:var(--ink);font-family:var(--sans);margin:0;font-size:16px;line-height:1.8}a{color:inherit;text-underline-offset:5px;text-decoration-thickness:1px}button,input{font:inherit}button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--coral);outline-offset:4px}p{word-break:keep-all}.shell{width:min(100%,1160px);margin:0 auto;padding-inline:30px}.skip-link{z-index:100;border:2px solid var(--ink);background:var(--cyan);padding:10px 14px;font-weight:900;position:fixed;top:-100px;left:16px}.skip-link:focus{top:14px}.site-header{border-bottom:1px solid var(--line);background:var(--white)}.header-grid{grid-template-columns:260px 1fr;align-items:stretch;min-height:82px;display:grid}.wordmark{border-right:1px solid var(--line);align-items:center;gap:13px;text-decoration:none;display:flex}.wordmark span{color:var(--blue);font-family:var(--mono);letter-spacing:-.07em;font-size:21px;font-weight:900}.wordmark strong{letter-spacing:-.025em;font-size:16px}nav{justify-content:flex-end;align-items:center;gap:26px;display:flex}nav a{min-height:44px;color:var(--muted);align-items:center;font-size:15px;font-weight:800;text-decoration:none;display:inline-flex}nav a:hover{color:var(--blue)}.hero{grid-template-columns:minmax(0,1fr) minmax(390px,.85fr);align-items:center;gap:clamp(44px,7vw,90px);padding-top:88px;padding-bottom:82px;display:grid}.kicker{color:var(--blue);font-family:var(--mono);letter-spacing:.1em;margin:0 0 15px;font-size:13px;font-weight:900}h1,h2,h3{letter-spacing:-.045em;word-break:keep-all;margin-top:0}h1{margin-bottom:0;font-size:clamp(44px,6vw,72px);line-height:1.1}h1 span{z-index:0;color:var(--blue);position:relative}h1 span:after{z-index:-1;background:var(--cyan);content:"";height:13px;position:absolute;bottom:5px;left:-4px;right:-4px}h2{margin-bottom:0;font-size:clamp(31px,4vw,47px);line-height:1.23}h3{margin-bottom:0;font-size:21px;line-height:1.45}.hero-lead{max-width:670px;color:var(--muted);margin:28px 0 0;font-size:19px;line-height:1.85}.hero-actions{flex-wrap:wrap;gap:12px;margin-top:34px;display:flex}.primary-action,.secondary-action,button,.button{border:2px solid var(--blue);border-radius:0;justify-content:center;align-items:center;min-height:50px;padding:11px 21px;font-weight:900;text-decoration:none;display:inline-flex}.primary-action,button,.button{background:var(--blue);color:var(--white)}.secondary-action{color:var(--blue);background:0 0}.primary-action:hover,button:hover,.button:hover{border-color:var(--blue-dark);background:var(--blue-dark)}.secondary-action:hover{background:var(--sky)}.search-card{border:1px solid var(--line);background:var(--white);box-shadow:14px 14px 0 var(--ink);padding:30px;position:relative}.search-card:before{background:var(--coral);content:"";width:68px;height:16px;position:absolute;top:-8px;right:38px}.search-card-top{grid-template-columns:38px 1fr 20px;align-items:center;gap:12px;display:grid}.search-card-top>span{background:var(--sky);width:38px;height:38px;color:var(--blue);font-family:var(--mono);border-radius:50%;place-items:center;font-weight:900;display:grid}.search-card-top strong,.search-card-top small{display:block}.search-card-top strong{font-size:14px}.search-card-top small{color:var(--muted)}.search-card-top b{color:var(--muted);font-size:22px}.search-title{color:var(--blue);letter-spacing:-.035em;margin:25px 0 9px;font-size:25px;font-weight:800;line-height:1.45}.search-snippet{color:var(--muted);margin:0}.search-annotation{flex-wrap:wrap;gap:6px;margin-top:24px;display:flex}.search-annotation span{background:var(--sky);color:var(--blue);font-family:var(--mono);padding:4px 8px;font-size:11px;font-weight:900}.example-caption{color:var(--muted);margin:16px 0 0;font-size:13px}.answer-band{border-block:1px solid var(--ink);background:var(--ink);color:var(--white)}.answer-band .shell{grid-template-columns:150px minmax(0,1fr) auto;align-items:start;gap:30px;padding-block:28px;display:grid}.answer-band p,.answer-band time{margin:0}.answer-band .kicker{color:var(--cyan)}.answer-band .shell>p:nth-child(2){font-size:17px;line-height:1.75}.answer-band time{color:#bdc9da;font-family:var(--mono);font-size:12px}.section{padding-block:78px;scroll-margin-top:20px}.section-heading{grid-template-columns:minmax(300px,.85fr) minmax(0,1.15fr);align-items:end;gap:clamp(34px,7vw,90px);margin-bottom:38px;display:grid}.section-heading>p{max-width:700px;color:var(--muted);margin:0;font-size:17px;line-height:1.9}.status-table{border-top:2px solid var(--ink);border-bottom:1px solid var(--ink)}.status-row{border-bottom:1px solid var(--line);grid-template-columns:.8fr .8fr 1.4fr;align-items:center;min-height:74px;text-decoration:none;display:grid}.status-row:last-child{border-bottom:0}.status-row>*{padding:16px 20px}.status-row>*+*{border-left:1px solid var(--line)}.status-head{background:var(--sky);min-height:48px;color:var(--blue);font-family:var(--mono);letter-spacing:.07em;font-size:12px;font-weight:900}a.status-row:hover{background:var(--white)}.status-row strong{font-family:var(--mono);overflow-wrap:anywhere}.status-row.available strong:before,.status-row.blocked strong:before,.status-row.review strong:before{content:"";border-radius:50%;width:9px;height:9px;margin-right:10px;display:inline-block}.status-row.available strong:before{background:#168c62}.status-row.blocked strong:before{background:var(--coral)}.status-row.review strong:before{background:#d69c18}.status-footnote{color:var(--muted);margin:18px 0 0;font-size:14px}.intent-section{background:var(--ink);color:var(--white)}.section-heading.inverse .kicker{color:var(--cyan)}.section-heading.inverse>p{color:#c0cad9}.intent-grid{border-top:1px solid #60708d;border-left:1px solid #60708d;grid-template-columns:repeat(4,minmax(0,1fr));display:grid}.intent-grid article{border-bottom:1px solid #60708d;border-right:1px solid #60708d;min-height:320px;padding:25px}.intent-grid article>span{color:var(--cyan);font-family:var(--mono);font-size:13px;font-weight:900}.intent-grid h3{min-height:62px;color:var(--white);margin-top:14px}.intent-grid dl{margin:24px 0}.intent-grid dt{color:#9eb0c9;font-size:12px}.intent-grid dd{color:var(--cyan);margin:2px 0 0;font-weight:800}.intent-grid p{color:#c0cad9;margin:0;font-size:14px}.anatomy-list{border-top:2px solid var(--ink);margin:0;padding:0;list-style:none}.anatomy-list li{border-bottom:1px solid var(--line);grid-template-columns:70px 230px minmax(0,1fr);align-items:start;gap:24px;padding:29px 0;display:grid}.anatomy-list li>span{color:var(--coral);font-family:var(--mono);font-weight:900}.anatomy-list p{color:var(--muted);margin:0}.notebook-section{border-block:1px solid var(--line);background:var(--white)}.notebook{border:2px solid var(--ink);background:var(--paper)}.notebook form{background-image:linear-gradient(var(--line) 1px, transparent 1px);background-size:100% 34px;padding:32px}.note-form-heading{background:var(--paper);max-width:700px;margin-bottom:27px;padding:18px}.note-form-heading h3{font-size:25px}.note-form-heading p:last-child{color:var(--muted);margin:7px 0 0}.note-fields{background:var(--paper);grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;padding:18px;display:grid}.note-fields label{font-weight:900;display:block}.note-fields label span{margin-bottom:7px;display:block}input{background:var(--white);width:100%;min-width:0;min-height:52px;color:var(--ink);border:1px solid #7585a1;border-radius:0;padding:11px 13px}input[aria-invalid=true]{border-color:var(--danger);box-shadow:0 0 0 1px var(--danger)}.notebook button{margin:22px 18px 18px}.note-error{border-left:4px solid var(--danger);color:var(--danger);background:#fff0ef;margin:0 18px 18px;padding:12px 14px;font-weight:800}.note-result{border-top:2px solid var(--ink);background:var(--white);grid-template-columns:.8fr 1.1fr 1fr;gap:24px;padding:32px;display:grid}.note-result dl{margin:0}.note-result dl div{border-bottom:1px solid var(--line);padding:7px 0}.note-result dt{color:var(--muted);font-size:12px}.note-result dd{font-family:var(--mono);overflow-wrap:anywhere;margin:0}.next-questions{background:var(--sky);padding:18px}.next-questions ol{margin:8px 0 0;padding-left:21px}.next-questions li{color:var(--muted);margin:6px 0;font-size:14px}.notebook noscript p{border-top:1px solid var(--line);margin:0;padding:16px 32px}.compare-cases{border-top:2px solid var(--ink)}.compare-cases article{border-bottom:1px solid var(--line);grid-template-columns:90px 1fr;padding:30px 0;display:grid}.compare-cases article>span{color:var(--coral);font-family:var(--mono);font-size:28px;font-weight:900}.compare-cases p{max-width:800px;color:var(--muted);margin:9px 0 0}.chapter-section{border-block:1px solid var(--line);background:#e4ebf6;padding-inline:max(30px,50vw - 550px)}.chapter-intro{grid-template-columns:1fr 1fr;gap:20px 80px;margin-bottom:40px;display:grid}.chapter-intro .kicker{grid-column:1/-1;margin-bottom:0}.chapter-intro>p:last-child{color:var(--muted);margin:0;font-size:17px}.chapter-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;display:grid}.chapter-card{border:1px solid var(--line);border-top:5px solid var(--blue);background:var(--white);padding:28px;scroll-margin-top:20px}.chapter-number{color:var(--coral);font-family:var(--mono);letter-spacing:.08em;margin:0 0 9px;font-size:12px;font-weight:900}.chapter-card h3{font-size:24px}.chapter-answer{color:var(--muted);margin:18px 0 0;line-height:1.9}.chapter-card details{border-top:1px solid var(--line);margin-top:19px}.chapter-card summary{cursor:pointer;min-height:52px;color:var(--blue);align-items:center;font-weight:900;display:flex}.chapter-card details div{padding-bottom:2px}.chapter-card details p{color:var(--muted);line-height:1.9}.faq-grid{border-top:2px solid var(--ink);grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.faq-grid details{border-bottom:1px solid var(--line)}.faq-grid details:nth-child(odd){border-right:1px solid var(--line);padding-right:30px}.faq-grid details:nth-child(2n){padding-left:30px}.faq-grid summary{cursor:pointer;align-items:center;min-height:66px;padding:13px 40px 13px 0;font-weight:900;display:flex}.faq-grid details p{color:var(--muted);margin:0 0 25px}.source-section{background:var(--white)}.source-grid{grid-template-columns:.8fr 1.2fr;gap:clamp(34px,7vw,90px);display:grid}.source-lead{border-left:5px solid var(--coral);margin-top:0;padding-left:18px;font-size:17px;font-weight:800}.source-links{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:25px;display:grid}.source-links a{border:1px solid var(--line);min-height:60px;color:var(--blue);justify-content:space-between;align-items:center;gap:12px;padding:11px 14px;font-weight:900;text-decoration:none;display:flex}.source-links a:hover{border-color:var(--blue);background:var(--sky)}footer{border-top:7px solid var(--cyan);background:var(--ink);color:var(--white);padding-block:40px}.footer-grid{grid-template-columns:.8fr 1.2fr;gap:40px;display:grid}footer strong{color:var(--cyan);font-family:var(--mono);letter-spacing:.05em}footer p{color:#bdc9da;margin:3px 0;font-size:14px}@media (max-width:960px){.header-grid{grid-template-columns:220px 1fr}.wordmark strong{display:none}.hero{grid-template-columns:1fr}.search-card{max-width:650px}.answer-band .shell{grid-template-columns:130px 1fr}.answer-band time{grid-column:2}.intent-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.intent-grid article{min-height:280px}.note-result{grid-template-columns:1fr 1fr}.next-questions{grid-column:1/-1}}@media (max-width:720px){.shell{padding-inline:20px}.header-grid{flex-direction:column;align-items:flex-start;gap:3px;min-height:auto;padding-block:13px 7px;display:flex}.wordmark{border-right:0;min-height:40px}.wordmark strong{display:inline}nav{justify-content:flex-start;gap:20px;width:100%;overflow-x:auto}nav a{flex:none}.hero{gap:42px;padding-top:52px;padding-bottom:56px}h1{font-size:clamp(39px,11.7vw,55px)}.hero-lead{font-size:17px}.search-card{box-shadow:8px 8px 0 var(--ink);padding:22px}.answer-band .shell{grid-template-columns:1fr;gap:8px}.answer-band time{grid-column:auto}.section{padding-block:56px}.section-heading,.chapter-intro,.source-grid{grid-template-columns:1fr;gap:15px}.chapter-intro .kicker{grid-column:auto}.status-head{display:none}.status-row{grid-template-columns:1fr;padding:18px 0;display:grid}.status-row>*{padding:3px 16px}.status-row>*+*{border-left:0}.intent-grid,.chapter-grid,.faq-grid{grid-template-columns:1fr}.intent-grid article{min-height:auto}.anatomy-list li{grid-template-columns:42px 1fr;gap:10px}.anatomy-list p{grid-column:2}.note-fields,.note-result{grid-template-columns:1fr}.notebook form,.note-result{padding:20px}.note-form-heading,.note-fields{background:var(--paper);padding:0}.notebook button{width:100%;margin:22px 0 0}.note-error{margin:16px 0 0}.next-questions{grid-column:auto}.compare-cases article{grid-template-columns:55px 1fr}.chapter-section{padding-inline:20px}.chapter-card{padding:22px}.chapter-answer,.chapter-card details p{word-break:normal;overflow-wrap:break-word}.faq-grid details:nth-child(odd),.faq-grid details:nth-child(2n){border-right:0;padding-inline:0}.source-links{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr;gap:15px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}