body{font-family:Arial,sans-serif;margin:0;padding:0;background:#f7f7f7;color:#111}header{background:#fff;padding:20px;border-bottom:1px solid #ddd}nav a{margin:0 10px;text-decoration:none;color:#333}section{padding:40px 20px}.wrap{max-width:1000px;margin:0 auto}footer{background:#fff;border-top:1px solid #ddd;padding:20px;text-align:center;font-size:14px;color:#666}