/* Desktops and laptops ----------- */
@media only screen and (max-width: 600px) {
    body {
        font-size: 14px;
    }
    nav ul {
        flex-direction: column;
        text-align: center;
    }
}

/* Tablettes et petits écrans */
@media only screen and (min-width: 601px) and (max-width: 1024px) {
    body {
        font-size: 16px;
    }
    nav ul {
        justify-content: center;
    }
}

/* Écrans larges (ordinateurs de bureau) */
@media only screen and (min-width: 1025px) {
    body {
        font-size: 18px;
    }
}