body { font-family: Arial, sans-serif; margin: 0; padding: 0; background: #f7f7f7; color: #333; }
header { text-align: center; padding: 40px; background: #ffffff; }
.call-btn { display: inline-block; margin-top: 20px; padding: 12px 20px; background: #0a8a5b; color: white; text-decoration: none; border-radius: 6px; }
section { padding: 20px; max-width: 700px; margin: auto; background: #fff; margin-top: 20px; border-radius: 8px; }
footer { text-align: center; padding: 20px; font-size: 14px; color: #666; }