.btn-backtop {
    height: 3rem;
    width: 3rem;
    display: none; /* Hidden by default */
    position: fixed; /* Fixed/sticky position */
    bottom: 1.3rem; /* Place the button at the bottom of the page */
    right: 0.8rem; /* Place the button 30px from the right */
    z-index: 99; /* Make sure it does not overlap */
    border: none; /* Remove borders */
    border-radius: 50px;
    outline: none; /* Remove outline */
    background-color: #226bb5;
    cursor: pointer; /* Add a mouse pointer on hover */
}

.btn-backtop:hover {
    opacity: 0.5;
}