Add CSS containment

[Emmzyemms]

Description: CSS containment isn't used to optimize rendering performance.

Acceptance Criteria:

• Identify containment opportunities
• Implement CSS containment
• Add containment fallbacks
• Test containment effectiveness
• Document containment usage

[thenoahs]

@thenoahs has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hello Maintainer I'll like to work on this issue please assign me

ℹ️ Repo Maintainers: To accept this application, review their application or assign @thenoahs to this issue.

[dollfins]

@dollfins has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hello maintainer, i would love to fix this issue kindly assign it to me Thanks

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[princesslux]

@princesslux has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Kindly assign this issue to me.i can handle it

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[yusufadeagbo]

@yusufadeagbo has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

can I work on this, please?

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[RaymondAbiola]

@RaymondAbiola has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I’d like to take responsibility for this task. I’m comfortable working independently through an unfamiliar codebase and turning the issue requirements into a complete implementation. I’ll keep the changes focused and make sure the final result is ready for review.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @RaymondAbiola to this issue.

[drips-wave]

Congratulations, @RaymondAbiola! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @RaymondAbiola: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Third Campaign campaign!

@RaymondAbiola's PR #1022 was approved and merged by @Emmzyemms.

🏆 @RaymondAbiola: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (822 total points). Track your full progress on GrantFox.

👏 Great work, @RaymondAbiola! Keep contributing to ANYTECHS.

[drips-wave]

This issue has been completed by @RaymondAbiola as part of the Stellar Wave Program's 8th Wave 🥳

😎 @RaymondAbiola: You earned 200 Points for completing this issue! After the current Wave ends, you'll be eligible for a percentage of the Wave's reward pool based on the percentage of total points you've earned. Learn more here. You can also Leave a review to share your experience working on this issue.

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