.greeting {
    height: 50vh;

    /* this container doen't show in the begining */
    opacity: 0;
    transition: opacity 0.5s ease;
    /* Smooth transition */

    display: flex;
    align-items: center;
    justify-content: center;

}

.fadeIn {
    opacity: 1;
}

.fadeOut {
    opacity: 0;
}