:root{--paper:#f2f0e7;--panel:#fffdf6;--ink:#12352e;--muted:#4d655f;--accent:#087458;--accent-dark:#065b46;--signal:#dcff82;--line:#c7d1c9;--danger:#a9302a;--mono:ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;--sans:-apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", sans-serif}*{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(--accent);outline-offset:4px}p{word-break:keep-all}code{font-family:var(--mono);overflow-wrap:anywhere}.wrap{width:min(100%,1180px);margin:0 auto;padding-inline:32px}.skip{z-index:100;border:2px solid var(--ink);background:var(--signal);color:var(--ink);padding:10px 14px;font-weight:800;position:fixed;top:-100px;left:16px}.skip:focus{top:14px}header{z-index:20;border-bottom:1px solid var(--line);background:#f2f0e7f5;position:sticky;top:0}.header-inner{justify-content:space-between;align-items:center;gap:28px;min-height:72px;display:flex}.brand{letter-spacing:-.03em;align-items:center;gap:12px;font-size:18px;font-weight:900;text-decoration:none;display:inline-flex}.brand-mark{background:var(--ink);width:38px;height:38px;color:var(--signal);font-family:var(--mono);letter-spacing:-.05em;place-items:center;font-size:15px;display:grid}nav{align-items:center;gap:24px;display:flex}nav a{min-height:44px;color:var(--muted);align-items:center;font-size:15px;font-weight:700;text-decoration:none;display:inline-flex}nav a:hover{color:var(--accent)}.hero{grid-template-columns:minmax(0,1.05fr) minmax(390px,.95fr);align-items:center;gap:clamp(42px,7vw,88px);padding:92px 0 72px;display:grid}.eyebrow,.section-index{color:var(--accent);font-family:var(--mono);letter-spacing:.09em;margin:0 0 14px;font-size:13px;font-weight:800}h1,h2,h3,h4{letter-spacing:-.04em;word-break:keep-all}h1{max-width:760px;margin:0;font-size:clamp(45px,6.2vw,76px);line-height:1.08}h1 span{color:var(--accent)}h2{margin:0;font-size:clamp(30px,3.6vw,44px);line-height:1.24}h3{margin:0;font-size:21px;line-height:1.45}h4{margin:0;font-size:17px}.lead{max-width:650px;color:var(--muted);margin:28px 0 0;font-size:19px;line-height:1.85}.hero-actions{flex-wrap:wrap;align-items:center;gap:14px 22px;margin-top:34px;display:flex}.button,button{border:1px solid var(--accent);background:var(--accent);color:#fff;border-radius:3px;justify-content:center;align-items:center;min-height:50px;font-weight:800;text-decoration:none;display:inline-flex}.button{padding:11px 22px}.button:hover,button:hover{border-color:var(--accent-dark);background:var(--accent-dark)}.text-link{min-height:44px;color:var(--accent);padding-block:8px;font-weight:800}.hero-note{border:1px solid var(--ink);background:var(--ink);color:#eff8f0;box-shadow:12px 12px 0 var(--signal);border-radius:4px;padding:0 32px 30px;position:relative}.terminal-top{margin-inline:-32px;color:#bbcdc6;font-family:var(--mono);letter-spacing:.08em;border-bottom:1px solid #49655e;justify-content:space-between;margin-bottom:30px;padding:13px 18px;font-size:12px;display:flex}.hero-note code{padding:20px 0 28px;font-size:clamp(18px,2.2vw,25px);line-height:1.6;display:block}.hero-note code strong{color:var(--signal);font-size:1.12em}.url-protocol{color:#a8b9b3}.url-path{color:#84d2b7}.url-query{color:#e5b06c}.url-legend{border-top:1px solid #49655e;margin:0}.url-legend div{border-bottom:1px solid #36534b;grid-template-columns:110px 1fr;gap:14px;padding:12px 0;display:grid}.url-legend dt{color:#9db5ac;font-size:14px}.url-legend dd{font-family:var(--mono);margin:0}.example-note{color:#b8cac4;margin:22px 0 0;font-size:14px}.answer-strip{border-block:1px solid var(--ink);grid-template-columns:140px minmax(0,1fr) auto;align-items:start;gap:28px;margin-bottom:28px;padding:26px 28px;display:grid}.answer-strip p{margin:0}.answer-label,.answer-meta{color:var(--muted);font-family:var(--mono);letter-spacing:.03em;font-size:13px}.answer-strip>p:nth-child(2){font-size:17px;line-height:1.75}.section{border-top:1px solid var(--line);padding:72px 0;scroll-margin-top:92px}.section-head{grid-template-columns:minmax(260px,.8fr) minmax(0,1.2fr);align-items:end;gap:clamp(30px,7vw,86px);margin-bottom:34px;display:grid}.section-head .muted{max-width:720px;color:var(--muted);margin:0;font-size:17px;line-height:1.85}.trace-board{border:1px solid var(--ink);background:var(--panel);border-radius:4px;overflow:hidden}.trace-route{background:var(--ink);color:#fff;grid-template-columns:minmax(0,1fr) 70px minmax(0,1fr);align-items:center;display:grid}.trace-route>div{flex-direction:column;justify-content:center;min-height:150px;padding:26px 32px;display:flex}.trace-route span,.trace-route small{color:#adc3bb;font-family:var(--mono);letter-spacing:.07em;font-size:12px}.trace-route strong{color:var(--signal);font-family:var(--mono);overflow-wrap:anywhere;margin:6px 0;font-size:clamp(17px,2vw,24px)}.trace-route b{color:var(--signal);font-family:var(--mono);text-align:center;font-size:30px}.trace-meta{border-bottom:1px solid var(--line);grid-template-columns:repeat(4,minmax(0,1fr));margin:0;display:grid}.trace-meta div{border-right:1px solid var(--line);padding:20px}.trace-meta div:last-child{border-right:0}.trace-meta dt{color:var(--muted);font-size:13px}.trace-meta dd{margin:4px 0 0;font-weight:800;line-height:1.55}.trace-actions{flex-wrap:wrap;gap:10px 28px;padding:16px 20px;display:flex}.trace-actions a{min-height:44px;color:var(--accent);align-items:center;font-weight:800;display:inline-flex}.tool{border:1px solid var(--ink);background:var(--panel);border-radius:5px;overflow:hidden;box-shadow:8px 8px #d7ddd4}.tool-bar{border-bottom:1px solid var(--line);background:#e2e6dd;align-items:center;gap:7px;height:46px;padding:0 18px;display:flex}.tool-bar span{background:var(--paper);border:1px solid #7d918a;border-radius:50%;width:10px;height:10px}.tool-bar strong{color:var(--muted);font-family:var(--mono);letter-spacing:.08em;margin-left:7px;font-size:12px}.tool form{padding:30px}.address-fields{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;display:grid}label{justify-content:space-between;align-items:baseline;gap:10px;margin-bottom:9px;font-weight:800;display:flex}label span{color:var(--muted);font-family:var(--mono);font-size:12px;font-weight:600}input{width:100%;min-width:0;min-height:54px;color:var(--ink);font-family:var(--mono);background:#fff;border:1px solid #6c837b;border-radius:3px;padding:12px 14px}input[aria-invalid=true]{border-color:var(--danger);box-shadow:0 0 0 1px var(--danger)}.form-actions{align-items:center;gap:22px;margin-top:20px;display:flex}.form-actions button{flex:none;padding:11px 24px}.privacy-note{color:var(--muted);margin:0;font-size:14px}.result{overflow-wrap:anywhere}.result-heading{border-top:1px solid var(--line);padding:30px 30px 0}.result-heading .eyebrow{margin-bottom:5px}.error-message{color:var(--danger);background:#fff0ee;border-top:1px solid #d49b96;margin:0;padding:18px 30px;font-weight:700}.comparison-summary{flex-wrap:wrap;gap:9px;margin:22px 30px 0;display:flex}.comparison-summary>*{border:1px solid var(--line);background:#eef1ea;border-radius:2px;padding:5px 10px;font-size:14px}.comparison-summary strong{border-color:var(--accent);background:var(--signal)}.result-grid{background:var(--line);grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;margin-top:24px;display:grid}.result-card{background:var(--panel);padding:26px 30px 30px}.result>.result-card{margin-top:20px}.result-card dl{margin:0}.result-card dl div{border-bottom:1px solid var(--line);grid-template-columns:125px minmax(0,1fr);gap:16px;padding:11px 0;display:grid}.result-card dt{font-weight:800}.result-card dd{font-family:var(--mono);margin:0}.result-flags{color:var(--muted);background:#eef1ea;margin:20px 0 0;padding:16px 16px 16px 34px;font-size:14px}.result-boundary{border-top:1px solid var(--line);color:var(--muted);background:#edf1eb;margin:0;padding:18px 30px;font-size:14px}noscript p{border-top:1px solid var(--line);margin:0;padding:18px 30px}.check-steps{border-top:1px solid var(--ink);grid-template-columns:repeat(2,minmax(0,1fr));margin:0;padding:0;list-style:none;display:grid}.check-steps li{border-bottom:1px solid var(--line);grid-template-columns:58px 1fr;gap:18px;padding:30px 28px 34px 0;display:grid}.check-steps li:nth-child(odd){border-right:1px solid var(--line)}.check-steps li:nth-child(2n){padding-left:28px}.check-steps li>span,.number{color:var(--accent);font-family:var(--mono);font-size:15px;font-weight:800}.check-steps p{color:var(--muted);margin:10px 0 0}.rows{border-top:1px solid var(--ink)}.rows article{border-bottom:1px solid var(--line);grid-template-columns:70px minmax(210px,.8fr) minmax(0,1.2fr);gap:24px;padding:30px 0;display:grid}.rows article p{color:var(--muted);margin:0}.rows article code{color:var(--accent);font-size:14px;display:block}.reading-layout{grid-template-columns:285px minmax(0,1fr);align-items:start;gap:clamp(36px,7vw,82px);display:grid}.reading-toc{border:1px solid var(--ink);background:var(--panel);border-radius:3px;max-height:calc(100dvh - 120px);padding:22px;position:sticky;top:96px;overflow:auto}.reading-toc strong{font-size:15px}.reading-toc ol{margin:14px 0 0;padding-left:22px}.reading-toc li{padding:4px 0;line-height:1.55}.reading-toc a{min-height:44px;color:var(--muted);align-items:center;font-size:14px;display:inline-flex}.reading-body article{border-bottom:1px solid var(--line);margin-bottom:42px;padding:0 0 42px;scroll-margin-top:96px}.reading-body article:last-child{margin-bottom:0}.reading-body h3{font-size:clamp(24px,3vw,31px)}.reading-body p:not(.eyebrow){max-width:760px;color:var(--muted);margin:19px 0;line-height:1.95}.back-toc{min-height:44px;color:var(--accent);align-items:center;font-size:14px;font-weight:800;display:inline-flex}.faq-list{border-top:1px solid var(--ink)}details{border-bottom:1px solid var(--line)}summary{cursor:pointer;align-items:center;min-height:60px;padding:14px 44px 14px 0;font-size:18px;font-weight:800;list-style-position:outside;display:flex}details p{max-width:780px;color:var(--muted);margin:0 0 24px}.source-section{grid-template-columns:minmax(260px,.8fr) minmax(0,1.2fr);gap:clamp(30px,7vw,86px);display:grid}.notice{border-left:4px solid var(--accent);margin-top:0;padding-left:20px;font-weight:700}.sources{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:28px;display:grid}.sources a{border:1px solid var(--line);background:var(--panel);justify-content:space-between;align-items:center;gap:16px;min-height:76px;padding:14px 16px;font-size:14px;font-weight:800;text-decoration:none;display:flex}.sources a:hover{border-color:var(--accent)}.sources span{color:var(--accent)}footer{border-top:1px solid var(--ink);background:var(--ink);color:#dbe7e1;padding:42px 0}.footer-inner{grid-template-columns:.8fr 1.2fr;gap:40px;display:grid}footer strong{color:var(--signal);font-size:18px}footer p{color:#b8cac4;margin:4px 0;font-size:14px}@media (max-width:900px){.header-inner{flex-direction:column;align-items:flex-start;gap:5px;padding-block:14px 8px}nav{gap:20px;width:100%;overflow-x:auto}nav a{flex:none}.hero{grid-template-columns:1fr}.hero-note{max-width:620px}.answer-strip{grid-template-columns:120px 1fr}.answer-meta{grid-column:2}.reading-layout{grid-template-columns:1fr}.reading-toc{max-height:none;position:static}.reading-toc ol{columns:2;column-gap:38px}.reading-toc li{break-inside:avoid}.sources{grid-template-columns:1fr}}@media (max-width:680px){.wrap{padding-inline:20px}header{position:static}.brand{font-size:17px}nav{gap:18px}.hero{gap:36px;padding:52px 0 48px}h1{font-size:clamp(40px,12.5vw,56px)}.lead{font-size:17px}.hero-note{box-shadow:7px 7px 0 var(--signal);padding:0 22px 24px}.terminal-top{margin-inline:-22px}.answer-strip{grid-template-columns:1fr;gap:8px;padding-inline:0}.answer-meta{grid-column:auto}.section{padding:52px 0;scroll-margin-top:20px}.section-head,.source-section{grid-template-columns:1fr;gap:14px}.trace-route{grid-template-columns:1fr}.trace-route>div{min-height:auto}.trace-route b{transform:rotate(90deg)}.trace-meta{grid-template-columns:1fr 1fr}.trace-meta div:nth-child(2){border-right:0}.trace-meta div:nth-child(-n+2){border-bottom:1px solid var(--line)}.tool{box-shadow:5px 5px #d7ddd4}.tool form,.result-heading,.result-card{padding-inline:20px}.address-fields,.result-grid{grid-template-columns:1fr}.form-actions{flex-direction:column;align-items:stretch;gap:12px}.form-actions button{width:100%}.comparison-summary{margin-inline:20px}.result-card dl div{grid-template-columns:1fr;gap:2px}.result-boundary,.error-message,noscript p{padding-inline:20px}.check-steps{grid-template-columns:1fr}.check-steps li,.check-steps li:nth-child(2n){border-right:0;padding:26px 0}.rows article{grid-template-columns:42px 1fr;gap:12px}.rows article p{grid-column:2}.reading-toc ol{columns:1}.reading-body article{scroll-margin-top:20px}.reading-body p:not(.eyebrow){word-break:normal;overflow-wrap:break-word}.footer-inner{grid-template-columns:1fr;gap:16px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}