#plugins-popup-close {
    position: absolute; 
    left: 0; 
    top: 0; 

    display: none;

    /*height: 38px;
    width: 38px;*/
    width: 6%;
    height: 6%;

    background:url("../_img/close-button-inverted.png");
    background-repeat: no-repeat;
    background-size: contain;

    cursor:pointer;
    border:none;
}

#plugins-popup-content {
    height: 100%;
    width: 100%;
    position: relative;
}

#plugins-popup-content iframe{
    border: 0;
    margin: 0;
    width: 100%;
    height: 100%;
    position: relative;
}