Fix alignment of signup form

[Pranjal6955]

🔍 Issue Reference
Fixes #602

📌 Summary
This PR adjusts the padding of the signup page block to ensure proper alignment and consistency with the overall UI design. The goal is to provide a polished, well-aligned signup form that enhances user experience.

🔧 Changes Made
✅ Updated the padding values in the CSS file to properly align the signup page block.
✅ Ensured padding consistency with the project’s design system and spacing standards.
✅ Tested the changes across multiple screen sizes and resolutions to ensure responsiveness.
✅ Adjusted related CSS properties to enhance the visual structure of the signup block.

📸 Before & After Screenshots

• Before:
  
• After:
  

🛠️ How to Test

1. Navigate to the signup page.
2. Verify that the form block now has uniform padding and is correctly aligned with the overall page layout.
3. Check responsiveness on different screen sizes to ensure the layout adapts well.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[Pranjal6955]

@marcgc21 @jvJUCA Sir can you please review this code