#myBtn {
    display: none;
    position: fixed;
    bottom: 10px;
    right: 30px;
    z-index: 99;
    font-size: 25px;
    border: none;
    outline: 5px;
    background-color: #1D608D;
    color: white;
    cursor: pointer;
    padding: 15px;
    border: 2px solid #DEF2FF;
    border-radius: 50px;
    font-size: 15px;
}

    #myBtn:hover {
        /*background-color: #DEF2FF;*/
        background-image: linear-gradient(150deg, #1C5A84 0%, #286300 85%);
    }