.blackout-modal-dialog {
    background: rgba(102, 102, 102, 0.5);
    width:100%;
    height:100%;
    position: fixed;
    top:0;
    display: none;
}

.modal-dialog-body {
    display: table;
    width: auto;
    /*width: 30vw;*/
    /*height: 40vh;*/
    /*display: inline-block;*/
    text-align: center;
    padding: 15px;
    border: 1px black;
    border-radius: 5px;
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    margin: auto;
    background: #fff;
}

.blackout-modal-dialog:target {
    display: block;
}

.btn-close-modal {
    display: inline-block;
    border: 1px solid #0000cc;
    color: #0000cc;
    padding: 0 12px;
    margin: 10px;
    text-decoration: none;
    background: #f2f2f2;
    font-size: 14pt;
    cursor: pointer;
}

    .btn-close-modal:hover {
        background: #e6e6ff;
    }