.titre {
    display: flex;
    justify-content: center;
    font-size: 4.5rem;
    font-weight: bold;
    padding-bottom: 2rem;
    margin: 0 auto;
}

.poste {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin: 0 auto;
    width: 80%;
    height: auto;
    margin-top: 2rem;
    margin-bottom: 2rem;
}

.hr {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto;
    width: 60%;
    height: 0.2rem;
    background-color:rgb(5, 123, 84);
    margin-top: 5rem;
    margin-bottom: 5rem;
}

@media only screen and (max-width: 768px) {

    .titre {
        font-size: 3rem;
    }

    .poste {
        width: 90%;
    }

    .hr {
        display: flex;
        justify-content: center;
        align-items: center;
        margin: 0 auto;
        width: 60%;
        height: 0.1rem;
        background-color:rgb(5, 123, 84);
        margin-top: 1rem;
        margin-bottom: 1rem;
    }
}