We started this book by reviewing the basics, such as the box model, and the difference between block and inline elements. A great place to learn more about these two important, fundamental topics is on Sitepoint's A to Z CSS screencasts. For block vs inline elements: https://www.sitepoint.com/atoz-css-screencast-display/ and for the box model https://www.sitepoint.com/atoz-css-screencast-box-model/. Here you can view some really helpful box models and display videos.
The box model and block versus inline elements
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