body{font-family:Arial,sans-serif;max-width:1000px;margin:auto;padding:20px;line-height:1.6;background:#f8f8f8;color:#222}header{background:#222;color:#fff;padding:20px;border-radius:8px}nav a{color:#fff;margin-right:15px;text-decoration:none}main{background:#fff;padding:20px;margin-top:20px;border-radius:8px}footer{text-align:center;margin-top:20px}