body{margin:0;background:#252728;color:#e6e8e9;font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif}
main{max-width:720px;margin:0 auto;padding:40px 20px 60px}
h1{font-size:28px;margin:0 0 4px}h2{font-size:19px;margin:28px 0 6px;color:#fff}
a{color:#9fc3e0}.muted{color:#9aa0a4;font-size:14px}nav a{margin-right:16px}