.cstrwhatsappBtn {
  display: block; /* Hidden by default */
  position: fixed; /* Fixed/sticky position */
  bottom: 5px; /* Place the button at the bottom of the page */
  right: 10px; /* Place the button 30px from the right */
  z-index: 3900; /* Make sure it does not overlap */
  border: none; /* Remove borders */
  outline: none; /* Remove outline */
  cursor: pointer; /* Add a mouse pointer on hover */
  padding: 15px; /* Some padding */
}