.flash {
    position: fixed;
    left: 0;
    right: 0;
    top: 10em;
    padding: 14px 20px;
    margin: 12px auto;
    max-width: 500px;
    width: 90%;
    border-radius: 14px;
    font-size: 15px;
    text-align: center;
    animation: fadeIn 0.4s ease-out;
    transition: box-shadow 0.3s ease;
    z-index: 1400;
}

.flash:hover {
    box-shadow:
        0 0 15px rgba(255, 255, 255, 0.2),
        0 0 30px rgba(100, 200, 255, 0.3);
}


@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}