Changes in version 2024.04.27:

• Add a skip to content link.
• Add --font-stack--headings.
• Add :visited colour and enforce uniform contrast between light/dark.
• Add an offset of :target to reduce back-to-top overlap.
• Improve dark mode colours.
• Fix outstanding colour contrast warnings on Firefox.
• Fix bad indent in footnotes.
• Tweak handling of default configuration options in a more resilient manner.
• Tweak length and sizing of API source links.
• Stop search engine indexing on search page.