.rv-required-error {
    border: 2px solid #dc3545 !important;
    background: #fff5f5 !important;
    box-shadow: 0 0 10px rgba(220,53,69,.35);
    transition: .25s;
}

#rvValidationMessage {
    position: fixed;
    top: 25px;
    right: 25px;
    background: #dc3545;
    color: white;
    padding: 14px 22px;
    border-radius: 8px;
    display: none;
    z-index: 999999;
    font-size: 15px;
    font-weight: 600;
}