x4c book renders inline code black-on-black

[smolkaj]

There appears to be a formatting bug for inline code in the x4c book. The inline code is rendered black on black and thus not readable, see screenshot below.

Details about my system:

• macOS 15.5 (24F74)
• Google Chrome 141.0.7390.123 (Official Build) (arm64)
  • can also reproduce on Safari