Padding takes the element's background colour; margin is always transparent.
By default padding is added to the width. Use box-sizing: border-box to keep the total width fixed (see the Box Model lesson).
💡 Key Takeaways: CSS Padding
Mastering CSS Padding helps you write clean and reliable CSS code. Follow standard conventions, test edge cases, and keep logic simple. Try running the code example below and complete the exercises to build confidence.