.popover-outer {

    display: none; 
    position: fixed; 
    z-index: 10; 
    left: 0;
    top: 0;
    width: 100%; 
    height: 100%; 
    overflow: auto; 
    background-color: rgb(0,0,0); 
    background-color: rgba(0,0,0,0.4); 

}

.popover-container {
    background-color: #fefefe;
    margin: 7% auto; 
    padding: 20px;
    border: 1px solid #888;
    width: 50%; 
}