CSS pseudo-classes

:first-child, :last-child, :nth-child(2), :nth-last-child(2)

:only-child, :only-of-type

:first-of-type, :last-of-type, :nth-of-type(2), :nth-last-of-type(2)

:not

:active, :focus, :hover, :link, :visited

https://www.example.com

:target

test-anchor

Lorem ipsum dolor sit amet, consectetur adipisicing elit. Officiis consequatur recusandae eaque provident blanditiis debitis animi eveniet quaerat quisquam.

:checked

.test-checkbox
.test-checkbox:checked

:empty

:enabled, :disabled, :valid, :invalid

.test-textbox
.test-textbox:disabled
.test-textbox:valid
.test-textbox:invalid

Elements should have a background color.

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