Edited accordingly for light theme

[Bhum-ika]

Closes: #333

• Title : Login Page Light theme
• Name: Bhumika Sharma
• Idenitfy yourself: GSSOC Contributor

Describe the add-ons or changes you've made 📃

I have updated the styles of login page to match the light theme which was earlier the same for both themes.

Type of change ☑️

• [x ] New feature (non-breaking change which adds functionality)

Checklist: ☑️

• My code follows the Contributing Guidelines & Code of Conduct of this project.
• This PR does not contain plagiarized content.
• I have performed a self-review of my own code.
• I have commented my code, particularly wherever it was hard to understand.
• My changes generate no new warnings.

Screenshots 📷

Kindly add all the tags while merging PR

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[Avdhesh-Varshney]

Match your login page theme with the website theme. At current, login page theme is ok. Just make it responsive for dark theme.