Invalid CSS

CSS declarations that are not valid and that I wish existed.

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text-color: linear-gradient(...)
2024-12-17
animation-repeat-period: 3s
2023-04-06
display: visually-hidden
2023-03-14
display: masonry
2023-02-11
:wrapped { ... }
2023-02-10
:stuck { ... }
2022-11-14
border-color: gradient(...)
2022-10-06
collapsing: none
2022-09-30
place: center
2022-09-27
font-family: system-font
2022-09-20
position-items: center
2022-09-18
position: temporal
2022-09-17
color: anthracite
2022-09-16
float: top
2022-09-15