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:none;}
dialog[open]{display:block;}
dialog + .backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:rgba(0,0,0,0.1);}
@media screen and (max-width:540px){dialog[_polyfill_modal]{top:0;width:auto;margin:1em;}
}
._dialog_overlay{position:fixed;top:0;right:0;bottom:0;left:0;}
dialog.fixed{position:fixed;top:50%;transform:translate(0, -50%);}