Checkout page enhanced

[Souradeep858]

PR Description

Summary of Changes

Provide a brief summary of the changes made and the problem being solved.

Completely redesigned and modernized the checkout experience to provide a cleaner, more intuitive, and responsive user interface.

Key Improvements
Refactored checkout page structure into a proper two-column layout.
Added a sticky order summary sidebar for improved visibility during checkout.
Enhanced Contact Information, Shipping Address, and Payment sections using modern card-based components.
Improved spacing, typography, visual hierarchy, and overall UI consistency.
Upgraded form inputs with better focus states and validation styling.
Improved responsive behavior across desktop, tablet, and mobile devices.
Modernized the order summary and checkout CTA for a more professional e-commerce experience.
Refined success modal styling and overall checkout aesthetics.
Cleaned up page structure to improve maintainability and readability.

This update addresses the outdated checkout design and creates a more polished, conversion-focused user experience.

Related Issue

Fixes # (issue number)

Fixes #2245

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• [.] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Verification & Testing

Local Verification

• [.] Built successfully locally
• [.] Console has zero errors or warnings

Devices/Browsers Tested

• [.] Chrome (Desktop)
• Safari (Mobile)
• Firefox

Checklist

• [.] Code follows project styling guidelines
• [.] Changes are fully responsive and accessible
• [.] No extraneous logs or debug code left
• Documentation updated accordingly

[vercel]

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