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+<!doctype html>
+<html>
+ <head>
+ <title>CSS Test (Conditional Rules): Negations of failing simple conditions in @supports should pass</title>
+ <link rel="author" title="Florian Rivoal" href="http://florian.rivoal.net/">
+ <link rel="author" href="http://opera.com" title="Opera Software ASA">
+ <link rel="help" href="http://www.w3.org/TR/css3-conditional/#at-supports">
+ <link rel="match" href="at-supports-001-ref.html">
+ <style>
+ div {
+ background-color:red;
+ height:100px;
+ width:100px;
+ }
+ @supports (not (yadayada: x, calc( 2/3 ))) {
+ div { background-color:green; }
+ }
+ </style>
+ </head>
+ <body>
+ <p>Test passes if there is a <strong>filled green square</strong> and <strong>no red</strong>.</p>
+ <div></div>
+ </body>
+</html>