body{font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;max-width:720px;margin:48px auto;padding:0 20px;line-height:1.6;color:#1f2328;background:#fff}
h1{font-size:1.8rem;margin-bottom:.2rem}h2{font-size:1.15rem;margin-top:2rem}
p.sub{color:#59636e;margin-top:0}a{color:#0969da}footer{margin-top:3rem;font-size:.85rem;color:#59636e}