.jumbotron {
    background-image: url(pics/fibres2.jpg);
    border-top: 1px darkgray solid;
    border-bottom: 1px darkgray solid;
}

.fa {
    padding: 20px;
    font-size: 30px;
    width: 70px;
    text-align: center;
    text-decoration: none;
    margin: 5px 2px;
}

.fa:hover {
    opacity: 0.7;
}

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