:root { color-scheme: light dark; --bg:#fbfbfc; --text:#1c1d21; --dim:#6b6e76; --line:#e4e5e8; --accent:#2f6fe0; }
@media (prefers-color-scheme: dark) { :root { --bg:#111214; --text:#f2f2f4; --dim:#9a9ca3; --line:#2c2e33; --accent:#5b8ff0; } }
* { box-sizing: border-box; }
body { margin:0; background:var(--bg); color:var(--text);
  font: 17px/1.7 -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 48px 20px 64px; }
h1 { font-size: 28px; line-height: 1.3; margin: 0 0 6px; }
h2 { font-size: 19px; margin: 36px 0 8px; }
p, li { margin: 0 0 12px; }
.dim { color: var(--dim); font-size: 15px; }
a { color: var(--accent); }
hr { border: 0; border-top: 1px solid var(--line); margin: 40px 0; }