Improving home page dark mode

[Sourabh782]

Describe the bug
Enhancing ui in dark mode and improving login and signup forms should not be scroll

To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
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Additional context
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[github-actions]

Thanks @Sourabh782 for raising this issue! We'll look into it.We hope you have made sure that a similar issue doesnt exist , if it does, kindly ask to be assigned on that issue