CSS Box model deals with the area that surrounds each elements and how it can be formatted.
the new code – The CSS Box Model
How To Adjust the Content, Padding, Border, and Margins of an HTML Element With CSS | DigitalOcean
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Universal CSS properties everyone must use. - DEV Community
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Box model
html - CSS: Width in percentage and Borders - Stack Overflow
The Box Model: Padding, Border, Margin: CSS Tutorial - Sabe.io
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What is the use of box-sizing property in CSS ? - GeeksforGeeks
Box model
