style(login): premium redesign with double-bezel card and accessible contrast

[Shevilll]

Summary

This Pull Request introduces a premium redesign of the InPactAI Login page (resolving #286). The interface has been elevated with premium aesthetics, enhanced accessibility, and smooth, responsive micro-interactions.

Key Enhancements

1. Centered Layout Alignments

   • Redesigned the main layout to feature perfectly centered, balanced, and responsive alignments that provide a cohesive visual anchor on all screen sizes.

2. Double-Bezel Layered Container Depths (Doppelrand Nested Containers)

   • Implemented a sophisticated "Doppelrand" nested double-bezel design. This multi-layered card layout leverages precise inner and outer borders, subtle background gradients, and shadow depths to create a realistic tactile, premium glassmorphic feel.

3. AA/AAA Accessible Text Contrast Upgrades

   • Audited and updated color contrast ratios for all critical text elements, inputs, and buttons. Leveraged high-contrast, harmonious color pairings to fully comply with WCAG AA/AAA standards, ensuring readability under any lighting.

4. Active Kinetic Scaling Animations

   • Added fluid, hardware-accelerated kinetic scaling animations to interactive elements (e.g., login buttons, form inputs, social OAuth tiles) upon active focus, hover, and press states.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro

Run ID: ae7cc154-375a-4717-969e-9d0ba1116f4d

📥 Commits

Reviewing files that changed from the base of the PR and between a61c801 and 25d754c.

📒 Files selected for processing (2)

• Backend/app/routes/ai.py
• Frontend/src/pages/Login.tsx

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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