body{font-family:Arial;background:#111;color:#fff;margin:0}header{background:#000;padding:20px;text-align:center}nav a{color:#76ff03;margin:10px}.hero{padding:50px;text-align:center}.hero button{padding:12px;margin:5px;background:orange;border:none}section{padding:30px}input,textarea{display:block;margin:10px;padding:10px;width:80%}