Refactor: Split monolithic index.html into modular structure

[PrafulCodes]

The current index.html file has grown to over 1400+ lines with inline CSS and JavaScript mixed in.
This impacts maintainability, merge management, and page performance.

Proposed Solution:
Extract inline CSS into a separate style.css file
Move JavaScript logic to a dedicated script.js file
Keep only structural HTML inside index.html
Ensure all references work correctly with existing animations and assets

Benefits:
Easier debugging and feature updates
Reduced merge conflicts
Improved caching and load speed
Cleaner contributor workflow

Labels:
hacktoberfest refactor enhancement

Request:
Please assign this issue to me

[PrafulCodes]

Here it's done

README.md has been already updated for same in #15

Now just please label it as Hacktoberfest accepted and assign it to me
and checkout the pull request also

[PrafulCodes]

@CourageCodeJourney I'll make a pull request as you merge #15 cause if now i make pull request with this it will cause conflicts
and tomorrow is last day of Hacktoberfest

[CourageCodeJourney]

@PrafulCodes this is an excellent refactor! You're totally right, that file was getting way too big. I've assigned this to you and labeled it for Hacktoberfest. You're all clear to open the new pull request for this issue whenever you're ready!

[PrafulCodes]

@PrafulCodes this is an excellent refactor! You're totally right, that file was getting way too big. I've assigned this to you and labeled it for Hacktoberfest. You're all clear to open the new pull request for this issue whenever you're ready!

Hello checkout the #20 PR and merge it up