:root{--text:#1d2129;--muted:#5f6670;--line:#e3e6ea;--bg:#fff;--soft:#f5f7fa;--accent:#2f5bd3}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:"Pretendard","Malgun Gothic","맑은 고딕","Apple SD Gothic Neo",system-ui,sans-serif;color:var(--text);background:var(--bg);line-height:1.75;font-size:16px;word-break:keep-all}
a{color:var(--accent)}
header.site{display:flex;align-items:center;gap:16px;padding:12px 20px;border-bottom:1px solid var(--line);position:sticky;top:0;background:#fff;z-index:5;flex-wrap:wrap}
.brand{font-weight:700;color:var(--text);text-decoration:none;font-size:17px;display:flex;align-items:center;gap:8px}
.brand img{width:22px;height:22px}
header.site nav{display:flex;gap:16px;margin-left:auto;align-items:center;flex-wrap:wrap}
header.site nav a{color:var(--muted);text-decoration:none;font-size:14px}
header.site nav a:hover{color:var(--accent)}
header.site nav a.cta{background:var(--accent);color:#fff;padding:6px 14px;border-radius:7px}
main.doc{max-width:760px;margin:0 auto;padding:32px 20px 64px}
main.doc h1{font-size:28px;line-height:1.35;margin:0 0 8px}
.lead{color:var(--muted);font-size:17px;margin:0 0 28px}
main.doc h2{font-size:21px;line-height:1.4;margin:44px 0 10px;padding-top:14px;border-top:1px solid var(--line)}
main.doc h3{font-size:17px;margin:26px 0 6px}
main.doc li{margin:4px 0}
code,kbd{background:var(--soft);border:1px solid var(--line);border-radius:4px;padding:1px 5px;font-size:.92em;font-family:Consolas,"D2Coding",monospace}
.fig{margin:18px auto 24px;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff;max-width:560px}
.fig .frame{width:100%;max-height:340px;background:#fff}
.fig iframe{width:100%;height:100%;border:0;display:block}
.fig figcaption{font-size:14px;color:var(--muted);padding:8px 14px;border-top:1px solid var(--line);background:var(--soft);display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}
.figrow{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.figrow .fig{margin:10px 0}
table{border-collapse:collapse;width:100%;font-size:15px;margin:12px 0}
th,td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
th{background:var(--soft);font-weight:600}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px;margin:16px 0}
.card{border:1px solid var(--line);border-radius:10px;padding:14px 16px;text-decoration:none;color:inherit;line-height:1.55}
.card:hover{border-color:var(--accent)}
.card b{display:block;margin-bottom:4px;color:var(--text)}
.card span{color:var(--muted);font-size:14px}
.note{background:#f0f5ff;border:1px solid #d4e0fb;border-radius:8px;padding:12px 16px;margin:16px 0}
.warn{background:#fff8ec;border:1px solid #f3dcae;border-radius:8px;padding:12px 16px;margin:16px 0}
.hero{text-align:center;padding:12px 0 8px}
.hero .btn{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;padding:10px 22px;border-radius:8px;font-weight:600;margin-top:8px}
details.faq{border:1px solid var(--line);border-radius:8px;padding:10px 16px;margin:10px 0}
details.faq summary{font-weight:600;cursor:pointer}
.prevnext{display:flex;justify-content:space-between;gap:12px;margin-top:44px;flex-wrap:wrap}
.prevnext a{text-decoration:none}
footer.site{border-top:1px solid var(--line);padding:24px 20px 32px;color:var(--muted);font-size:14px;text-align:center;line-height:2}
footer.site a{color:var(--muted);margin:0 8px;text-decoration:none}
footer.site a:hover{color:var(--accent)}
@media (max-width:640px){
  main.doc h1{font-size:23px}
  .figrow{grid-template-columns:1fr}
  header.site nav{margin-left:0;gap:12px}
}