Calculator Pro is a beautifully crafted, feature-rich web application that provides a complete suite of calculators in a single, easy-to-use interface. Designed with modern UI/UX principles, it offers a delightful user experience with smooth animations and a premium, professional look. Since it's built with pure HTML, CSS, and vanilla JavaScript, it's incredibly lightweight, fast, and requires no external libraries or frameworks. This is the perfect script for web developers looking to add a powerful tool to their website, for students, or for anyone who wants a beautiful and functional calculator hub. KEY FEATURES : - Stunning Modern Design:*** Clean, professional, and premium aesthetic.* Beautiful glassmorphism effect on the header and footer.* Animated gradient background that adds a dynamic feel.* Fully responsive design that looks perfect on desktops, tablets, and mobile devices. Dual Theme (Light & Dark Mode):*** A sleek toggle switch to alternate between a light and a dark theme.* User's theme preference is automatically saved in their browser. Interactive Animations & UI:*** Stunning 3D animated headline on the homepage.* Smooth "grow and lift" hover effects on calculator cards.* Scroll-triggered animations that make content appear elegantly.* Interactive popups and a seamless transition from the homepage to the calculator tools. Essential Calculators Included:**1. **Scientific Calculator:** For advanced mathematical functions.2. **BMI Calculator:** To check Body Mass Index.3. **Age Calculator:** To find the exact age in years, months, and days.4. **Loan (EMI) Calculator:** With a multi-currency dropdown (Rupee, Dollar, Pound, etc.).5. **Date Difference Calculator:** To calculate the number of days between two dates.6. **Percentage Calculator:** For all your percentage calculation needs. Core Technology:*** Built with pure, clean **HTML5, CSS3, and Vanilla JavaScript.*** **No jQuery or other external libraries/frameworks needed!*** Single file structure for the main application, making it extremely easy to manage and deploy. What You Get:*** `index.html`: The main application file containing the homepage and all calculators.* `documentation.html`: A detailed documentation file with instructions on usage, implementation, and customization.