header img {
   width: 180px;
   height: auto;
}

body{font-family:Arial,sans-serif;margin:0;line-height:1.6;color:#333}header{background:#0b5cab;color:#fff;padding:20px;text-align:center}.hero{padding:60px 20px;background:#eef6ff;text-align:center}.btn{background:#0b5cab;color:#fff;padding:12px 20px;text-decoration:none;border-radius:6px}section{max-width:900px;margin:auto;padding:40px 20px}footer{text-align:center;padding:20px;background:#eee}nav a{color:white;margin:0 10px}