a:link
a:visited
a:hover
a:active


Descendants Selector
x y

Children Selector
x > y

Siblings Selector
x ~ y

Adjacents Selector
x + y

Attribute Selector
x[title]

Attribute Value Selector
x[href="foo"]

Attribute Query Value Selector
x[href*="foo"]

Attribute Query Start Value Selector
x[href^="http"]

Attribute Query End Value Selector
x[href$=".jpg"]

Data Attribute Value Selector
x[data-filetype="image"]

First Child
ul > li:first-child

Last Child
ul > li:last-child

Nth Child
x:nth-child(n)

Nth Last Child
x:nth-last-child(n)

Hover
x:hover 

Before
x:before

After
x:after

Checked
input[type=radio]:checked