🧮 Secure Dark-Themed PHP Calculator

A simple yet secure calculator built with PHP and modern dark-themed frontend design. This project was created as a personal reference to remind myself how to properly handle frontend and backend input validation in PHP.

✨ Features

• Secure input validation on both frontend and backend
• Clean and minimal dark UI
• Smooth button hover and transition animations
• Beautiful mouse hover blur effect
• Responsive layout for desktop screens
• Easy to integrate into any dark-themed site

💡 Mouse hover blur effect was adapted from
Dulaj007/Mouse-Hover-Blur-Effect

🔧 Technologies Used

• PHP – Backend input processing and validation
• HTML5 – Markup
• CSS3 – Styling with modern effects, transitions, and glassmorphism
• JavaScript – For mouse cursor tracking and visual effects

🛠 How to Use

1. Clone or download this repository.
2. Run in a local server environment (e.g. XAMPP, WAMP, MAMP).
3. Open index.php in your browser.
4. Enter numbers and select an operator to see the result securely handled.

⚠️ Note

This project is not intended for production use. It is a lightweight and educational example focusing on secure input handling and modern UI patterns.

🧪 License

This project is licensed under the MIT License – feel free to use and modify it!

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Made with ❤️ to practice and promote secure and aesthetic PHP applications.