#myBtn {
    display: none; /* Hidden by default */
    position: fixed; /* Fixed/sticky position */
    bottom: 0.5rem; /* Place the button at the bottom of the page */
    right: 0.5rem; /* Place the button 30px from the right */
    z-index: 99; /* 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 */
    font-size: 18px; /* Increase font size */
    height: 5rem;
    width: 3rem;
    background-color: #ffffff;
    border-radius: 2.25rem;
  }
  
.btn-back-top{
    height: 3.2rem;
}