body{font-family:Arial;background:#f2f6ff;text-align:center}
.container{margin-top:150px}
.btn{padding:15px 30px;background:#2b6cff;color:#fff;text-decoration:none;border-radius:5px}
.whatsapp{position:fixed;bottom:20px;right:20px;background:green;color:#fff;padding:10px 15px;border-radius:50px}