Element button pseudo-class :active generated with display block box-shadow 5px 0px 2px rgba(0,0,0,0.5) transform box-sizing content-box float none font-size 16px opacity 1 margin 0px transition border-radius line-height normal text-shadow cursor default position static overflow visible background height 300px width 300px border 1px rgba(0,0,0,1) solid font-weight normal z-index auto outline none padding 0px