Summary  
This chapter explains how to include external CSS stylesheets and apply CSS classes to HTML elements to build structured informational blocks such as notes, study-more sections, and definitions.  

General domain of usage  
Web development

This section contains a variety of buttons, each designed to perform a specific function.

This section provides auxiliary tools that support content formatting and data manipulation.

This section contains additional features and tools designed to provide enhanced functionality.

This section contains various text box elements.

Please don't use any elements from this section, as it doesn't provide any value for the content development. Thank you!

Please note that the elements in this section are deprecated and no longer recommended for use. It would be best to avoid using them moving forward. Thank you!

Note / Study more / Definition