body{font-family:Arial,sans-serif;margin:0;background:#f5f5f5;color:#222}
header{background:#1f3a1f;color:white;padding:20px;text-align:center}
nav a{color:white;margin:0 10px;text-decoration:none}
main{max-width:1000px;margin:auto;padding:20px}
.card{background:white;padding:15px;margin:15px 0;border-radius:8px}
footer{background:#222;color:white;text-align:center;padding:15px;margin-top:20px}