*{
margin: 0;
padding: 0;
border: 0;
}
.btn-wsp{
    position: fixed;
    width: 55px;
    height: 55px;
    line-height: 55px;
    bottom: 30px;
    left: 25px;
    background: transparent;
    color: #FFF;
    border-radius: 50px;
    text-align: center;
    font-size: 30px;
    z-index: 100;
}
.btn-wsp:hover{
    text-decoration: none;
    color: transparent;
    background: transparent;
}