*{box-sizing:border-box}
body{margin:0;font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:#f6f7f9;color:#222}
main{max-width:720px;margin:0 auto;padding:24px}
header{margin-bottom:24px}
h1{margin:0 0 4px;font-size:2rem}
#date{margin:0;color:#666}
article{background:#fff;border:1px solid #e3e6ea;border-radius:12px;padding:24px;box-shadow:0 1px 3px rgba(0,0,0,.05)}
h2{margin-top:0}
footer{margin-top:24px;color:#777;font-size:.9rem;text-align:center}