#TopBtn {
    display: none; /* Hidden by default */
    position: fixed; /* Fixed/sticky position */
    bottom: 10px; /* Place the button at the bottom of the page */
    right: 10px; /* Place the button 30px from the right */
    z-index: 99; /* Make sure it does not overlap */
    border: 1px black solid; /* Remove borders */
    outline: none; /* Remove outline */
    background-color: #FFFFFF; /* Set a background color */
    color: black; /* Text color */
    cursor: pointer; /* Add a mouse pointer on hover */
    padding:10px 15px;
    border-radius: 2px; /* Rounded corners */
    font-family:"avenir next";
    font-size:18px;
    font-weight:600;
}

#TopBtn:hover {
    background-color: #000000; /* Add a dark-grey background on hover */
    color:white;
}