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+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Flexible Box Test: Negative margins</title>
+<link rel="author" title="Google Inc." href="https://www.google.com/">
+<link rel="help" href="http://www.w3.org/TR/css-flexbox-1/#item-margins">
+<link rel="match" href="reference/negative-margins-001-ref.html">
+<meta name="assert" content="Tests that for intrinsic size computations,
+an item may take up less than zero space when it has negative margins.">
+<style>
+ .container {
+ width: 40px;
+ background-color: red;
+ line-height: 0px;
+ border: 3px black solid;
+ }
+
+ .flex {
+ display: inline-flex;
+ background-color: green;
+ }
+
+ .item {
+ width: 20px;
+ height: 10px;
+ background-color: green;
+ }
+
+ .first {
+ width: 40px;
+ }
+
+ .neg-marg {
+ margin-left: -40px;
+ }
+</style>
+<body>
+ <p>You should see a green rectangle with a black border, 40px wide. You should see no red.</p>
+
+ <div class="container">
+ <div class="flex">
+ <div class="item first"></div>
+ <div class="item neg-marg"></div>
+ <div class="item"></div>
+ </div>
+ </div>
+</body>