body{font-family:Arial,sans-serif;margin:0;background:#f5f5f5;color:#222}header{background:#0b4ea2;color:#fff;padding:30px;text-align:center}.tag{font-size:1.2em}nav{background:#111;padding:10px;text-align:center}nav a{color:#fff;margin:0 10px;text-decoration:none}.hero{padding:40px;text-align:center;background:#fff}.btn{background:#0b4ea2;color:#fff;padding:12px 20px;text-decoration:none;border-radius:6px}section{max-width:900px;margin:20px auto;background:#fff;padding:20px;border-radius:8px}footer{text-align:center;padding:20px}input,textarea{display:block;width:100%;margin:10px 0;padding:10px}button{padding:10px 16px}