.modale {
    z-index: 999;
    background-color: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    margin: auto;
    max-width: 500px;
}

/* Pour le background du body, tu peux le mettre en base et annuler sur mobile */
.container {
    background-image: url('../images/backgrounddashboard.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

@media only screen and (max-width: 767px) {
    .container {
        width: 100%;
        padding: 0 15px;
    }
    .modale {
        width: 90%;
        margin: 20px auto;
    }

}