.boton_flotante, .scrollup{
        width:60px;
        height:60px;
        color:#fff;
        position: fixed;
        left:10px;
        border-radius:50%;
        line-height:80px;
        text-align:center;
        z-index:999;
}

.scrollup{
        display:none;
}

.boton_flotante:hover{
        cursor: pointer;
}