:root{color-scheme:dark;--bg:#17191D;--page:#111316;--surface:#1F2228;--line:#2C3038;--text:#E2E4E8;--muted:#9AA0AA;--accent:#7FA7C9}
html[data-theme=light]{color-scheme:light;--bg:#F4F3EF;--page:#ECEBE6;--surface:#FBFAF7;--line:#E3E1DB;--text:#25272B;--muted:#5F646C;--accent:#3E6A8E}
*{box-sizing:border-box}body{margin:0;background:var(--page);color:var(--text);font-family:'Pretendard Variable',Pretendard,system-ui,sans-serif;line-height:1.7;word-break:keep-all}
a{color:var(--accent)}header{border-bottom:1px solid var(--line)}.bar{max-width:880px;margin:0 auto;padding:0 16px;height:56px;display:flex;align-items:center;gap:20px}
.logo{display:inline-flex;align-items:center;gap:8px;color:var(--text);text-decoration:none;font-weight:700}nav{display:flex;gap:16px;overflow-x:auto;font-size:14px}nav a{color:var(--muted);text-decoration:none;white-space:nowrap}
.cta{display:inline-block;padding:10px 18px;border-radius:8px;background:var(--text);color:var(--bg);text-decoration:none;font-weight:700}.cta.sm{margin-left:auto;padding:6px 12px;font-size:14px}
main{max-width:880px;margin:0 auto;padding:40px 16px 64px}h1{font-size:30px;line-height:1.3;margin:0 0 12px}.lead{font-size:18px;color:var(--muted);margin:0 0 20px}
section{margin-top:36px;padding:20px 24px;background:var(--surface);border:1px solid var(--line);border-radius:12px}h2{font-size:19px;margin:0 0 8px}ul{margin:0;padding-left:20px}li{margin:4px 0}
details{border-top:1px solid var(--line);padding:10px 0}details:first-of-type{border-top:0}summary{cursor:pointer;font-weight:600}.dim,.more{color:var(--muted);font-size:14px}.more{margin-top:28px}
footer{text-align:center;padding:24px 16px 40px;font-size:13px;color:var(--muted)}footer a{color:var(--muted)}
@media (max-width:640px){h1{font-size:24px}.lead{font-size:16px}nav{display:none}section{padding:16px}}