body{font-family:-apple-system,"Hiragino Sans",sans-serif;max-width:720px;margin:0 auto;padding:24px 18px;line-height:1.8;color:#222}
h1{font-size:1.5em}h2{font-size:1.15em;margin-top:2em;border-bottom:1px solid #ddd}a{color:#0a63c9}.date{color:#666}nav{text-align:right}