CSS Layers
Layers help you to assign priority to various elements that you want to use in your web page.
You can assign priority by assigning value to the element’s z-index. The higher the value you set, the higher the priority.
Here is how to do this in code:
H2{
z-index: 2;
background-color: #336699;
}
p {
z-index: 1;
background-color: #FFCCCC;
}