Fix code syntax highlight style issue when without given language

[flameddd]

Issue

Code syntax highlight style broken when without given language (screenshot in below).

Fix

Update style for without given language

• The value of padding, background, color are SAME with other existed <pre />, <code /> style

How to test

Past following text into any Markdown file and review it

``` redis> zrange zset 0 -1

1. "b"
2. "ba"
3. "bar"
4. "bar*"
5. "f"
6. "fo"
7. "foo"
8. "foo*"
9. "foob"
10. "fooba"
11. "foobar"
12. "foobar*" ```

Note

Currently Firefox did NOT support :has() yet, but it's looks acceptable (for this small fix).

See Firefox screenshot in blow

Screenshot Before

Screenshot After, Brave

Screenshot After, Safari

Screenshot After, Firefox