.reginas-phone-invalid {
    border-color: #d63638 !important;
    box-shadow: 0 0 0 1px #d63638 !important;
}

.reginas-phone-error {
    display: block;
    width: 100%;
    margin-top: 6px;
    color: #d63638;
    font-size: 12px;
    line-height: 1.35;
}

.reginas-phone-error[hidden],
.reginas-phone-error:empty {
    display: none !important;
}