a.popup2-cerrar {
   position: absolute;
   top:3px;
   right:3px;
   background-color: #333;
   padding:7px 10px;
   font-size: 20px;
   text-decoration: none;
   line-height: 1;
   color:#fff;
}

/*--popup2--*/
#popup2 {
   visibility: hidden;
   opacity: 0;
	 margin: 0 0px;
}

.popup2-contenedor {
    position: fixed;
    margin: 1% 25% auto;
    padding: 20px 50px;
    /*cambios*/

    top:50%;
    left:50%;
    width:460px;  /* adjust as per your needs */
    height:290px;   /* adjust as per your needs */
    margin-left:-200px;   /* negative half of width above */
    margin-top:-200px; 

    /* cambios*/
    background-color: #FFFFFF;
    color: #333;
    border-radius: 3px;
    max-width: 100%;
}

#popup2:target {
   visibility:visible;
   opacity: 1;
   background-color: rgba(0,0,0,0.8);
   position: fixed;
   top:0;
   left:0;
   right:0;
   bottom:0;
   margin:0;
   z-index: 999;
   transition:all 1s;
}