Change color of paragraph text
This is red text.
Set background color
With blue background.
Change font size and family
Styled font.
Add border to elements
Spacing inside and outside
Style change on mouse hover
Align text left, center, right
Add shadow to box
Border-radius usage
Control element transparency
Smooth style change on hover
Apply linear gradient
Add shadow to text
Absolute and relative positioning
block, inline, none
Layer stacking
Basic flex container
Simple CSS Grid
Responsive design
Resize the window
Link to external stylesheet
This uses external CSS.