.validacion-error {
    background-color: #ffcccc;
    color: #d60000;
    padding: 10px;
    margin: 10px 0;
    border-radius: 5px;
    text-align: center;
    font-weight: bold;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 9999;
    opacity: 1;
    transition: opacity 0.5s ease;
}