Element button pseudo-class :hover generated with border 6px rgba(204,22,22,0) solid width 160px height 160px display block position absolute cursor pointer float none margin 0px overflow visible background font-size 25px opacity 0.81 text-shadow -1px -1px 0px rgba(15,73,168,0.66) line-height normal transition box-sizing content-box transform font-weight normal box-shadow 8px 8px 10px rgba(28,23,23,0.51) border-radius padding 20px z-index auto