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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
 <head>
  <title>CSS Test: An @supports rule with balanced invalid syntax within parentheses must evaluate to false</title>
  <link rel="author" title="Cameron McCormack" href="mailto:cam@mcc.id.au">
  <link rel="help" href="http://www.w3.org/TR/css3-conditional/#at-supports">
  <meta name="flags" content="">
  <meta name="assert" content="An @supports condition must successfully parse a parenthesized expression that has invalid syntax with balanced parentheses.">
  <link rel="match" href="support/pass.htm">
  <style type="text/css">
    html { background-color: red }
    @supports (unknown) or (color: green) {
      html { background-color: green }
    }
  </style>
 </head>
 <body>
 </body>
</html>