body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu;max-width:880px;margin:40px auto;padding:0 16px;line-height:1.5}
h2{margin-top:28px}
.card{border:1px solid #e4e7eb;border-radius:10px;padding:16px;margin:16px 0}
.muted{color:#666}