.tfw-message {
    position: fixed;
    left: 50%;
    top: 1rem;
    width: 300px;
    margin: 0;
    margin-left: -150px;

    transform: transateY(-100%);
    opacity: 0;
}

.tfw-message.show {
    transform: transateY(0);
    opacity: 1;
    transition: all .2s;
}