:root{--bg:#fff;--fg:#1c1c1e;--muted:#6b6b70;--line:#e4e4e8;--accent:#2f5fd0}
@media(prefers-color-scheme:dark){:root{--bg:#161618;--fg:#f2f2f4;--muted:#a0a0a8;--line:#2c2c30;--accent:#7c9cff}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.7 -apple-system,"Segoe UI","Apple SD Gothic Neo","Noto Sans KR",sans-serif}
main{max-width:720px;margin:0 auto;padding:32px 16px 64px}
h1{font-size:28px;margin:0 0 4px}h2{font-size:19px;margin:32px 0 8px}
p,li{margin:8px 0}ul{padding-left:20px}.muted{color:var(--muted);font-size:14px}
a{color:var(--accent)}nav{display:flex;gap:16px;border-bottom:1px solid var(--line);padding:12px 16px;max-width:720px;margin:0 auto}
hr{border:0;border-top:1px solid var(--line);margin:32px 0}