body{margin:0;background:#fff;color:#000;font-family:-apple-system,"Hiragino Sans",sans-serif;line-height:1.8}
header{border-bottom:4px solid #9ED8F5;padding:16px 20px;font-weight:700}
main{max-width:720px;margin:0 auto;padding:20px}
h1{border-left:6px solid #9ED8F5;padding-left:10px}
h2{margin-top:32px;border-bottom:2px solid #9ED8F5}
a{color:#000;text-decoration-color:#9ED8F5;text-decoration-thickness:2px}
footer{text-align:center;padding:24px;color:#555;font-size:.85em}