:root{--bg:#fff;--fg:#111;--muted:#555;--accent:#0E8A6E;--line:#e5e5e5}
@media (prefers-color-scheme:dark){:root{--bg:#111;--fg:#f2f2f2;--muted:#aaa;--line:#2a2a2a}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:18px/1.6 Inter,-apple-system,"Segoe UI",Roboto,sans-serif}
main{max-width:720px;margin:0 auto;padding:32px 16px 64px}
h1{font-size:30px;line-height:1.25;margin:0 0 8px}
h2{font-size:21px;margin:32px 0 8px}
p,li{color:var(--fg)}
.muted{color:var(--muted);font-size:16px}
a{color:var(--accent)}
nav{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:24px;font-size:16px}
.note{border-left:4px solid var(--accent);padding:8px 16px;margin:16px 0;background:rgba(14,138,110,.08)}