Usage
Material Design's depth is created by using pseudoelements. To give en element depth, just:
<div am-depth="0">Zero Depth</div>
<div am-depth="1">One Depth</div>
<div am-depth="2">Two Depth</div>
<div am-depth="3">Three Depth</div>
<div am-depth="4">Four Depth</div>
<div am-depth="5">Five Depth</div>