.btn-wsp {
    position: fixed;
    bottom: 25px;
    right: 25px;
    z-index: 9999;
    background-color: #25D366;
    border-radius: 50%;
    padding: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.btn-wsp img {
    width: 40px;
    height: 40px;
}
.btn-wsp:hover {
    transform: scale(1.1);
    transition: 0.2s;
}