I had the same question when I first started using Bootstrap margins classes and padding utilities.
The framework doesn’t have pixel-specific classes like pad-10. Instead, it uses a scale from 0 to 5, where each number corresponds to a multiple of the base spacing unit (usually 4px).
So, you use classes like m-2 or p-4 to add margin or padding. If you need very specific spacing that Bootstrap doesn’t cover, you’d have to write custom CSS.