body{font-family:Arial,sans-serif;margin:0;padding:0;background:#f5f5f5;color:#333}header{background:#003366;color:white;padding:1em;text-align:center}nav a{margin:0 15px;color:white;text-decoration:none}main{padding:2em}footer{background:#222;color:white;text-align:center;padding:1em;position:relative;bottom:0;width:100%}.car-card{background:white;padding:1em;margin-bottom:1em;border-radius:8px;box-shadow:0 0 10px rgba(0,0,0,0.1)}