Update script.js

[Imran-imtiaz48]

This improved version of the JavaScript code enhances readability by using clearer function and variable names, making it easier to understand. It also ensures that the script runs only after the DOM has fully loaded by wrapping everything inside a DOMContentLoaded event listener, preventing potential issues with accessing elements before they exist. Instead of using traditional for loops, the code leverages the more modern and readable .forEach() method for iterating over elements, improving maintainability. Additionally, the scroll event logic is optimized using classList.toggle("active", condition), making the code cleaner and more efficient. These improvements make the script more structured, efficient, and aligned with modern JavaScript best practices. 🚀