body {
    overflow: hidden;
    margin:0;
    padding:0
}

.modalDialog {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: rgba(0,0,0,0.55);
    z-index: 99999;
    opacity:0;
    -webkit-transition: opacity 400ms ease-in;
    -moz-transition: opacity 400ms ease-in;
    transition: opacity 400ms ease-in;
    pointer-events: none;
}

.modalDialog:target {
    opacity:1;
    pointer-events: auto;
}

.modalDialog > div {
    position: relative;
    margin: 5% 5%;
    font-family: 'sans';
    padding: 10px 20px;
    border-radius: 10px;
    background: #fff;
}


.close {
    color:gray;
    position: absolute;
    font-family:  monospace;
    font-weight: 900;
    font-size:1.2em;
    right: 10px;
    text-align: center;
    top: 15px;
  
}
.close:hover { color: red; }