.centered-content {
    text-align: left;
    padding: 5px;
}
input, button {
    padding: 5px;
    margin: 5px;
}
html, body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    height: 100%;
    overflow: hidden;
    width: 100%;
    margin: 0;
    padding: 0;
}
#error-message {
    height: 30px;
    font-weight: bold;
    color: red;
    display: flex;
    flex-direction: column-reverse;
    animation: EMfadeOut 3s forwards;
}

@keyframes EMfadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
}