label.error {
    color: #f00;
    font-size: 14px;
    display: block;
    font-weight: 400 !important;
}

input.valid {
    background-color: #dff0d8;
    border: 1px solid #3c763d !important;
    color: #336534;
}

input.error {
    outline: none;
    background-color: #f2dede;
    border: 1px solid #a94442 !important;
    color: #973d3b;
}