body{font-family:system-ui,-apple-system,"Hiragino Sans",sans-serif;max-width:720px;margin:0 auto;padding:24px 16px;line-height:1.7;color:#222}
h1{font-size:1.6rem}h2{font-size:1.2rem;margin-top:2rem}nav a{margin-right:1rem}footer{margin-top:3rem;font-size:.9rem;color:#555}