body { font-family: Arial, sans-serif; margin:0; background:#f4f4f4; }
header { background: linear-gradient(90deg,#2ecc71,#f39c12); color:#fff; text-align:center; padding:40px; }
.call-btn { background:#27ae60; color:#fff; padding:15px 25px; text-decoration:none; border-radius:6px; font-size:20px; display:inline-block; margin-top:15px; }
section { max-width:900px; margin:auto; padding:30px; }
iframe { width:100%; height:300px; border:0; }
footer { background:#222; color:#fff; text-align:center; padding:20px; }
footer a { color:#f39c12; }