/* VENTANA MODAL AL CARGAR LA PÁGINA */

#ventana43 {
    text-align: center;
    font-family: sans-serif;
    margin: 0;
}

.modalbegin {
    width: 100%;
    height: 100vh;
    /* background: rgba(0,0,0,0.8); */
    background: rgba(255, 255, 255, 0.95);
    position: fixed;
    top: 0;
    left: 0;
    display: flex;
    animation: modalbegin 2s 3s forwards;
    visibility: hidden;
    opacity: 0;
    z-index: 4;
}

.contenidobegin {
    margin: auto;
    width: 70%;
    height: 70%;
    /* background: white; */
    border-radius: 10px;
}

#img43 {
    height: 300px;
}

#cerrar {
    display: none;
}

#cerrar+label {
    position: fixed;
    color: #fff;
    font-size: 25px;
    z-index: 50;
    background: darkred;
    height: 40px;
    width: 40px;
    line-height: 40px;
    border-radius: 50%;
    right: 50px;
    /* margin: auto; */
    top: 50px;
    cursor: pointer;
    animation: modalbegin 2s 3s forwards;
    visibility: hidden;
    opacity: 0;
    text-align: center;
}

#cerrar:checked+label,
#cerrar:checked~.modalbegin {
    display: none;
}

@keyframes modalbegin {
    100% {
        visibility: visible;
        opacity: 1;
    }
}