.flash-container{
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 9999;
    width: 400px;
}

.flash-container .alert{
    animation: slideDown 0.3s ease;
}

@keyframes slideDown{
    from{
        opacity:0;
        transform: translateY(-20px);
    }
    to{
        opacity:1;
        transform: translateY(0);
    }
}