body{font-family:Arial;margin:0}header{position:sticky;top:0;background:#0b5ed7;color:#fff;padding:15px;display:flex;justify-content:space-between}.hero{padding:80px;text-align:center;background:#eef5ff}section{padding:40px}nav a{color:#fff;margin:0 10px;text-decoration:none}input,textarea{display:block;width:100%;max-width:500px;margin:10px 0;padding:10px}