body{margin:0;font-family:Arial,sans-serif;line-height:1.6;background:#f4f6f9;color:#333}
header{background:#0b2e4a;color:#fff;padding:20px 0;position:sticky;top:0}
.container{width:90%;max-width:1100px;margin:auto}
nav a{color:#fff;margin:0 10px;text-decoration:none}
.hero{background:#123f66;color:#fff;padding:80px 20px;text-align:center}
.btn{display:inline-block;padding:10px 20px;background:#ffb400;color:#000;text-decoration:none;margin-top:10px}
section{padding:40px 0}
.card{background:#fff;padding:20px;margin:10px;display:inline-block;width:30%;box-shadow:0 0 10px rgba(0,0,0,0.1);vertical-align:top}
footer{background:#0b2e4a;color:#fff;text-align:center;padding:20px;margin-top:20px}
@media(max-width:768px){.card{width:100%;}}