#element_to_pop_up {
    background-color: #fff;
    border-radius: 15px;
    color: #000;
    display: none;
    padding: 20px;
    min-width: 800px;
    min-height: 800px;
}

#div_modal_popup_url {
    background-color: #fff;
    border-radius: 15px;
    color: #000;
    display: none;
    padding: 20px;
    min-width: 900px;
    min-height: 700px;
}

#div_modal_popup_url_size {
    background-color: #fff;
    border-radius: 15px;
    color: #000;
    display: none;
    padding: 20px;
}

.b-close {
    border-radius: 7px 7px 7px 7px;
    box-shadow: none;
    font: bold 131% sans-serif;
    padding: 0 6px 2px;
    position: absolute;
    font-size: 30px;
    font-weight: bold;
    background-color: #aaa;
    right: -7px;
    top: -7px;
    cursor: pointer;
}

    .b-close:hover {
        color: #fff;
        font-size: 30px;
        font-weight: bold;
        background-color: #000;
    }