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+<!DOCTYPE html>
+<html>
+ <meta charset="UTF-8">
+ <title>CSS Position: Box inset properties & position:fixed grid container as the root element</title>
+ <link rel="author" title="Daniel Holbert" href="mailto:dholbert@mozilla.com"/>
+ <link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
+ <link rel="author" title="Mozilla" href="http://www.mozilla.org/">
+ <link rel="help" href="https://drafts.csswg.org/css-position-3/#insets">
+ <link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1584890">
+ <link rel="match" href="position-fixed-root-element-ref.html">
+ <meta name="assert" content="This test verifies the box inset properties on a position:fixed grid container root element.">
+
+ <style>
+ html {
+ display: grid;
+ position: fixed;
+ left: 10px;
+ right: 20px;
+ top: 30px;
+ bottom: 40px;
+ border: 5px dashed black;
+ box-sizing: border-box;
+ }
+ </style>
+
+ The black border should encompass the whole viewport,
+ with a bit of space on each side.
+ <br><br>
+ It shouldn't just shrinkwrap this text's height.
+</html>