::backdrop {
  background-color: rgba(0,0,0,.3)
}
dialog{
  border: 2px solid #369;
  border-radius: 12px;
}
dialog > h2{
  border-radius: 8px 8px 0 0;
  padding: 10px 20px;
  background-color: #eee;
  margin: 0;
}
dialog > p,
dialog > div{
  padding: 10px 20px;
}