body {
    background: white;
}

.banner {
    background: #525f7f;
    background: -webkit-linear-gradient(to right, #525f7f, #6480c8, #525f7f);
    background: linear-gradient(to right, #525f7f, #6480c8, #525f7f);
    background-image: url('https://source.unsplash.com/1600x900/?nature,water')
}

.footer-social .footer-social-link {
    height: 4rem;
    width: 4rem;
    font-size: 1.5rem;
}

.btn-twitter {
    color: #fff;
    background-color: #1da1f2;
    border-color: #1da1f2;
}
.btn-facebook {
    color: #fff;
    background-color: #3b5998;
    border-color: #3b5998;
}