body{font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Segoe UI",sans-serif;max-width:720px;margin:0 auto;padding:24px;line-height:1.8;color:#1c2434}
h1{font-size:1.6rem}h2{font-size:1.2rem;margin-top:2rem}
header{border-bottom:2px solid #1d4ed8;padding-bottom:12px;margin-bottom:24px}
.tag{color:#556}nav a{margin-right:16px}
footer{margin-top:48px;padding-top:16px;border-top:1px solid #ccd;font-size:.85rem;color:#667}
a{color:#1d4ed8}