.btnSobeTela {
    text-align: center;
    display: none;
    float: right;
    position: fixed;
    right: 30px;
    bottom: 20px;
    font-size: 25px;
    color: white;
    background-color: rgb(139, 185, 223);
    border-radius: 15px;
    width: 40px;
    height: 40px;
    cursor: pointer;
    z-index: 99;
}