It looks like there is some sort of glow effect on the text that isn't rendering right on your browser? It arguably doesn't have the best contrast, but seems to be as intended in Safari 26.3. Looks similar on Chrome macOS too: https://imgur.com/yq5PrKm.
Firefox on Windows, but it looks about the same in Edge
Screenshot of the header: https://i.imgur.com/4abfGYF.png
It looks like there is some sort of glow effect on the text that isn't rendering right on your browser? It arguably doesn't have the best contrast, but seems to be as intended in Safari 26.3. Looks similar on Chrome macOS too: https://imgur.com/yq5PrKm.
Renders equally weird for me on Firefox on Windows 11. Firefox on MacOS looks good though.
Edit: Seems like mix-blend-mode: plus-lighter is bugged in Firefox on Windows https://jsfiddle.net/bjg24hk9/
Firefox on Android: 'Google AI' (in app name) is clipped off the top; the Apple 'share' button is clipped on the bottom.