See https://forum.xwiki.org/t/moving-to-a-system-font-stack/13934

https://systemfontstack.com/

Sans-serif

{{font-family: -apple-system, BlinkMacSystemFont, avenir next, avenir,
segoe ui, helvetica neue, helvetica, Cantarell, Ubuntu, roboto, noto,
arial, sans-serif;}}

Serif

{{font-family: Iowan Old Style, Apple Garamond, Baskerville, Times New Roman,
Droid Serif, Times, Source Serif Pro, serif, Apple Color Emoji,
Segoe UI Emoji, Segoe UI Symbol;}}

Mono

{{font-family: Menlo, Consolas, Monaco, Liberation Mono, Lucida Console,
monospace;}}