body{margin:0;font-family:Arial;background:#0b1f3a;color:#fff}
header{text-align:center}
.banner{width:100%;max-height:220px;object-fit:cover}
nav{background:#08162b;padding:10px}
nav a{color:#fff;margin:12px;text-decoration:none;font-weight:bold}
.hero{padding:40px}
form{display:flex;flex-direction:column;width:300px;margin:auto}
input,button{margin:8px;padding:10px}
button{background:#1e90ff;color:white;border:none}