selector {property:value;}

div {}	element
.hej {}	class
#hopp {}	id
:hover {}	pseudo 
[align] {}	attribute
* {}		wildcard

div span {}	descendent
div>span{}	child
div.hej {}	specification
.hej,#hej 	multiple
div+span{}	next sibling
div~span{}	next all siblings


<div class="hej hopp">
	<span id="hopp" class="hopp"></span>
	<span>
		<span>Hej</span>
	</span>
</div>
<span align="right"></span>
<span class="hej">Hej</span>
<div></div>