Structs

https://www.w3.org/TR/2021/WD-css-fonts-4-20210729/#font-prop

Enums

https://www.w3.org/TR/2021/WD-css-fonts-4-20210729/#font-weight-absolute-values

https://www.w3.org/TR/2021/WD-css-fonts-4-20210729/#font-family-prop

https://www.w3.org/TR/2021/WD-css-fonts-4-20210729/#font-size-prop

https://www.w3.org/TR/2021/WD-css-fonts-4-20210729/#font-stretch-prop

https://www.w3.org/TR/2021/WD-css-fonts-4-20210729/#font-style-prop

https://www.w3.org/TR/2021/WD-css-fonts-4-20210729/#font-variant-caps-prop

The font property only supports font-variant-caps values from CSS 2.1

https://www.w3.org/TR/2021/WD-css-fonts-4-20210729/#font-weight-prop

https://www.w3.org/TR/2021/WD-css-fonts-4-20210729/#generic-font-families

https://www.w3.org/TR/2020/WD-css-inline-3-20200827/#propdef-line-height

https://drafts.csswg.org/css2/#propdef-vertical-align