A high-performance, responsive navigation sidebar built using Pure CSS3 and HTML5. This project implements the "Checkbox Hack" to manage component state without relying on JavaScript.

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• Pure CSS State Management: Utilizes the :checked pseudo-class and General Sibling Combinators (~) for logic.
• Glassmorphism Aesthetic: Implements backdrop transparency and soft shadows for a modern feel.
• Responsive Design: Uses vh units and relative positioning for a consistent experience across viewports.
• Optimized Performance: Zero JS overhead leads to faster load times and smoother animations.

• index.html - Primary entry point and semantic structure.
• style.css - Stylesheet containing layout, transitions, and hover logic.
• photo.jpg - Background image asset.

• HTML5 / CSS3
• Font Awesome (Iconography)
• Google Fonts (Roboto & Poppins)