.fa {
    padding: 15px;
    width: 45px;
    text-align: center;
    text-decoration: none;
    border-radius: 50%;
}

.fa:hover {
    opacity: 0.7;
}

.fa-facebook {
    background: #3B5998;
    color: white;
}

.fa-linkedin {
    background: #007bb5;
    color: white;
}

.fa-whatsapp {
    background: #25D366;
    color: white;
}

@media screen and (max-width: 768px) {
    .fa {
        padding: 7px;
        width: 30px;
    }

}