body {
    text-align: justify;
}
@media only screen and (max-device-width:980px) {
    body {
        font-size: 2rem;
        text-align: justify;
    }
    nav, .navbar-brand, .nav-item {
        font-size: 2rem;
    }
    .navbar-toggler {
        font-size: 3rem;
    }
    h4, h5, h6, .contact, .mentions, .submit {
        font-size: 1.75rem;
    }
    .alert {
        font-size: 2rem;
    }
}