body { font-family: Arial; background:#fff; color:#000; margin:0; padding:0; }
header { background:#FFD700; padding:30px; text-align:center; }
.cta { background:#000; color:#fff; padding:10px 20px; text-decoration:none; }
section { padding:20px; }
footer { background:#f5f5f5; padding:15px; text-align:center; }