#page_connexion {
    display: flex;
    justify-content: center;
    padding: 2vh;
}
@media (max-width: 1250px) {
    #page_connexion {
    display: flex;
    flex-wrap: wrap;
}
}

.form_connexion {
    display: flex;
    flex-direction: column;
    margin: 5vw;
}

.ligne_connexion{
    margin: 1vh;
}