.whatsapp-float{
    position: fixed;
    left: 20px;
    bottom: 20px;
    z-index: 150;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: #25d366;
    color: #fff;
    font-size: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
    text-decoration: none;
    transition: transform 150ms ease-in-out;
}
.whatsapp-float:hover,
.whatsapp-float:focus{
    color: #fff;
    transform: scale(1.08);
}
@media (max-width: 576px) {
    .whatsapp-float{
        left: 14px;
        bottom: 14px;
        width: 50px;
        height: 50px;
        font-size: 28px;
    }
}