dialog{position: absolute; left: 0; right: 0; width: -moz-fit-content; width: -webkit-fit-content; width: fit-content; height: -moz-fit-content; height: -webkit-fit-content; height: fit-content; margin: auto; border: solid; padding: 1em; background: white; color: black; display: block;}dialog:not([open]){display: none;}dialog + .backdrop{position: fixed; top: 0; right: 0; bottom: 0; left: 0; background: rgba(0,0,0,0.1);}._dialog_overlay{position: fixed; top: 0; right: 0; bottom: 0; left: 0;}dialog.fixed{position: fixed; top: 50%; transform: translate(0, -50%);}