.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.4);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-contenido {
    background-color: #fff;
    padding: 25px 30px;
    border-radius: 10px;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
    text-align: center;
    position: relative;

    /* Para evitar que el contenido se extienda o desborde */
    box-sizing: border-box;
}