@media (max-width: 991.98px){
    .sujet {
        color: #707070;
        font-size: 1.2rem;
        margin-bottom: 1rem;
    }
    h1 {
        margin-top: 1rem;
    }
}

@media (min-width: 992px){
    .sujet {
        color: #707070;
        font-size: 1.5rem;
    }
}
h1 {
    font-size: 1.9rem;
}