/* Flash messages: visible for 5s, then fade out and collapse. */
@keyframes fadeOutMessage {
    to {
        opacity: 0;
        visibility: hidden;
        height: 0;
        padding: 0;
        margin: 0;
    }
}

.flash-message {
    animation: fadeOutMessage 0.5s ease-in 5s forwards;
    overflow: hidden;
}