.overlay {
width: 100%; 
height: 100%;
background: #ffffff;
position: fixed;
top: 0;
left: 0;
z-index: 98;
}
.dialog {
position: fixed;
top: 15%;
left: 50%;
width:500px;
margin-left:-250px;
z-index: 100;
border:solid 8px #d9414d;
}
.dialog div{
background-color:#ffffff;
padding:17px 19px;
color:#fff;
text-align:left;
}
.dialog .chiudi{
position:absolute;
top:0px;
right:0px;
}