body { font-family: Arial, sans-serif; margin:0; }
header { padding:20px; background:#f4f6f8; }
nav a { margin-right:15px; text-decoration:none; }
.hero { width:100%; max-width:800px; }
footer { background:#f4f6f8; padding:20px; margin-top:40px; }
.logo { height:40px; }