#modal-pdf-zb {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    z-index: 99999;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

#modal-pdf-zb.modal-abierto {
    display: flex;
}

#modal-pdf-zb .modal-pdf-contenido {
    position: relative;
    width: min(100%, 1000px);
    height: 85vh;
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

#cerrar-pdf-zb {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 2;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: #000;
    color: #fff;
    font-size: 24px;
    cursor: pointer;
    line-height: 1;
}

#iframe-pdf-zb {
    width: 100%;
    height: 100%;
    border: 0;
}

@media (max-width: 767px) {
    #modal-pdf-zb {
        padding: 10px;
    }

    #modal-pdf-zb .modal-pdf-contenido {
        width: 100%;
        height: 90vh;
        border-radius: 10px;
    }

    #cerrar-pdf-zb {
        top: 8px;
        right: 8px;
        width: 36px;
        height: 36px;
        font-size: 22px;
    }
}