body{font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;max-width:720px;margin:40px auto;padding:0 16px;color:#1d2433;background:#fff}
h1{font-size:1.6rem;margin-bottom:.2rem}small{color:#666}h2{font-size:1.1rem;margin-top:1.6rem}