[EuiHeader] Set up CSS variable for fixed header affordance; [Emotion] Set up CSS variable architecture#7151

Merged

cee-chen merged 7 commits intomainfrom theme-css-variables

Sep 5, 2023

+655-223

Commits on Aug 30, 2023

[EuiThemeProvider] Add context & state required for theme CSS variables architecture (#7132 )
cee-chen
committed

Commits on Sep 5, 2023