#fb-login-button {
    background-color: #1877f2;
    color: #ffffff;
    padding: .75rem 1rem;
    border-radius: 3px;
    display: flex;
    align-items: center;
    font-size: 1.3rem;
    font-weight: 600;
    cursor: pointer;
    letter-spacing: normal;
    text-decoration: none;
}

#fb-login-button > span {
    margin-left: 1rem;
}