body{font-family:Arial;margin:0;background:#f5f5f5}
.topbar{background:#0f172a;padding:20px;color:white;text-align:center}
.nav a{margin:10px;color:white;text-decoration:none}
.wrap{max-width:900px;margin:auto}
.hero-card,.content-card{background:white;padding:20px;margin-top:20px;border-radius:10px}