.popup
{
    border: 1px solid black;
    background-color: lightgrey;
    box-shadow: 1px 1px 5px grey;
    min-height:50px;
    max-height:90%;
    min-width:100px;

    display:flex;
    flex-direction: column;

    position: fixed;
    top: 50%;
    left: 50%;
    z-index: 10000;
    transform: translate(-50%, -50%);

    border-radius:5px;
}

.popup > nav
{
    background-color: grey;
    text-align:right;
    cursor:move;
}

.popup > nav > span
{
    display: inline-block;
    right:0;
    padding:2px;
    border : 1px solid grey;
    margin : 2px;
    border-radius : 5px;
    cursor:pointer;
    //background:lightgray;
}

.popup > div
{
    padding:0 10px 10px 10px;
    overflow:auto;
}