body:is(dialog[open]) {
    overflow: hidden;
}

:where(dialog) {
    border: none;
    border-radius: 20px;
  }
  
dialog::backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
}