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