#backbtn {
    text-decoration: underline;
    cursor: pointer;
    color: #08fc;
}
.error-feedback {
    opacity: 1;
    transform: scale(100%);
    font-weight: bold;
    color: #630;
    transition: all 250ms ease-in-out;
}
.error-feedback.hide {
    opacity: 0;
    transform: scale(0);
    transition: all 250ms ease-in-out;
}