:root{--teal:#0088B0;--ink:#1d2730;--muted:#5b6b78;--bg:#f7fafb}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif}
main{max-width:720px;margin:0 auto;padding:32px 20px 64px}
header{display:flex;align-items:center;gap:12px;margin-bottom:24px}
header img{width:44px;height:44px;border-radius:10px}
header a{color:var(--ink);text-decoration:none;font-weight:700;font-size:20px}
h1{font-size:28px;line-height:1.25;margin:8px 0 4px}
h2{font-size:19px;margin:28px 0 6px}
a{color:var(--teal)}
.muted{color:var(--muted);font-size:14px}
.box{background:#fff;border:1px solid #dde6ea;border-radius:12px;padding:16px 20px;margin:16px 0}
ol li,ul li{margin:4px 0}
footer{margin-top:40px;font-size:14px;color:var(--muted)}
footer a{margin-right:16px}