| <!-- |
| Any copyright is dedicated to the Public Domain. |
| http://creativecommons.org/publicdomain/zero/1.0/ |
| --> |
| <!DOCTYPE html> |
| <title>CSS Test: Test a failing custom property declaration in an @supports rule whose value contains a variable reference with fallback containing a top level '!' token.</title> |
| <link rel="author" title="Cameron McCormack" href="mailto:cam@mcc.id.au"> |
| <link rel="help" href="http://www.w3.org/TR/css-variables-1/#syntax"> |
| <link rel="match" href="support/color-green-ref.html"> |
| <style> |
| body { color: red; } |
| @supports (--a: a) and (not (--a: var(--b,!))) { |
| p { color: green; } |
| } |
| </style> |
| <p>This text must be green.</p> |
