/* Default styles for screens wider than 768 pixels (considered as desktop) */
#app-container {
    display: flex;
    flex-direction: row;
}

/* Styles for screens with a width of 768 pixels or less (considered as mobile) */
@media only screen and (max-width: 769px) {
    #app-container {
        display: 'flex';
        flex-direction: column;
    }
}