When box-sizing is set to content-box(default) why border size is little less than what i set it to be? i set border size to 10px but in box model it shows 9.600px.
does anyone knows where i’m making mistake?

I have a Django website that displays data in a table, most of the data is highlighted with a calculated background color to make it quickly obvious to the user. Is there a way to reduce the amount of HTML I am outputting?
Eg:

I’ve been working with CSS and came across three different ways to remove outlines and borders from elements. However, I’m confused about the differences between them. Could someone explain how outline-style: none, outline: none, and border: none differ in terms of their usage and effects?