.fa {
    padding: 10px;
    font-size: 20px;
    width: 20px;
    text-align: center;
    text-decoration: none;
    margin: 2px 1px;
    border-radius: 50%;
    box-sizing: content-box !important;
}

    .fa:hover {
        opacity: 0.7;
        color:white;
    }

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

a:hover.fa-facebook {
    opacity: 0.7;
    /*border: 2px solid yellow;*/
    color: white;
}


.fa-youtube {
    background: #bb0000;
    color: white;
}

a:hover.fa-youtube {
    opacity: 0.7;
    /*border: 2px solid yellow;*/
    color: white;
}

.fa-instagram {
    background: #125688;
    color: white;
}

a:hover.fa-instagram {
    opacity: 0.7;
    /*border: 2px solid yellow;*/
    color: white;
}

/*a:hover.line-icon {
    opacity: 1;
    border: 2px solid yellow;
    color: white;
}*/