False-positive with the CSS :not pseudo-class #1354
Description
With the following content:
<?xml version="1.0" encoding="UTF-8"?>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops" xml:lang="en">
<head>
<title>CSS test for :not</title>
<style>
@namespace epub "http://www.idpf.org/2007/ops";
:not(nav.class) > h1 {
color: blue;
}
:not(nav[epub|type="landmarks"]) > h1 {
text-decoration: underline;
}
</style>
</head>
<body>
<nav epub:type="toc">
<h1>Table of Contents</h1>
</nav>
<nav epub:type="landmarks">
<h1>Guide</h1>
</nav>
</body>
</html>EPUBCheck lists these two errors:
Validating using EPUB version 3.2 rules.
ERROR(CSS-008): epubcheck-issue.epub/EPUB/xhtml/epubcheck-issue.xhtml(10,21): An error occurred while parsing the CSS: Token ")" not allowed here.
ERROR(CSS-008): epubcheck-issue.epub/EPUB/xhtml/epubcheck-issue.xhtml(14,25): An error occurred while parsing the CSS: Token "=" not allowed here.
Check finished with errors
Messages: 0 fatals / 2 errors / 0 warnings / 0 infos
EPUBCheck completed
The CSS appears to be correct, so I believe EPUBCheck should not report any errors.
Here's a small EPUB file that reproduces the issue (renamed to .zip, otherwise it wouldn't upload):
epubcheck-issue.zip