In Cascading Style Sheets, the em unit is the height of the font in nominal points or inches.

Video Introduction: https://www.khanacademy.org/computing/computer-programming/html-css/intro-to-css/p/css-basics

CSS Tutorials

• https://www.w3schools.com/css/css_intro.asp
• https://www.w3schools.com/css/default.asp

 

Why em instead of px? https://stackoverflow.com/questions/609517/why-em-instead-of-px

Ordered List-CSS: https://www.w3schools.com/css/tryit.asp?filename=trycss_list-style-type_ex

Type Editor online practice: https://learn.playto.io/html-css/lesson/6

csspractice.html (file in teacher CSS folder)

CSS Reference Sheet:
http://www.beginnersguidetohtml.com/references/css
http://www.beginnersguidetohtml.com/guides/css/introduction/what-is-css

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Resources:
http://www.beginnersguidetohtml.com/guides/css/introduction/what-is-css
Slide Intro:https://www.teaching-materials.org/htmlcss/lesson4/slides#slide1
http://css.maxdesign.com.au/selectutorial/rule.htm
shortcuts http://css.maxdesign.com.au/selectutorial/rules_shorthand.htm
External, Internal and Inline CSS Styles http://www.beginnersguidetohtml.com/guides/css/styles/external-internal-inline-styles