child css

1tr:nth-child(even) {background: #CCC}
2tr:nth-child(odd) {background: #FFF}

1/* Selects the second <li> element in a list */
2li:nth-child(2) { 
3  color: lime;
4}
5
6/* Selects every fourth element
7   among any group of siblings */
8:nth-child(4n) {
9  color: lime;
10}
11

1li:nth-child(even) { /* Selects only even elements */
2    color: green;   
3}

1  p:nth-child(2)
2 	{     
3 		background: red;
4 	}

1:nth-child(3) { //the number is the child number you are targeting
2	//styles here 
3}

1/*
2	Descendant selectors are used to match to any nested element. 
3	Child combinators, on the other hand, only match to the direct 
4	child element and are defined by the greater than symbol. 
5	The selector on the right must be the direct child of the element 
6	on the left.
7*/
8/* child combinator */ 
9  parent > child {...}
10
11/* descendant selector */ 
12  parent child {...}
13  ancestor descendant {...}
14