dialog{height:-moz-fit-content;height:fit-content;padding:1em;border:solid;right:0;color:#000;position:absolute;margin:auto;background:#fff;left:0;width:-moz-fit-content;width:fit-content;display:block}dialog:not([open]){display:none}dialog+.backdrop{background:rgba(0,0,0,.1)}._dialog_overlay,dialog+.backdrop{right:0;position:fixed;bottom:0;top:0;left:0}dialog.fixed{transform:translateY(-50%);position:fixed;top:50%}