Element button pseudo-class :hover generated with padding 20px background font-size 16px transition width 160px margin 0px box-sizing content-box position static float none transform display block z-index auto border 0px rgba(0,0,0,1) solid border-radius line-height 1 font-weight normal overflow hidden cursor default height auto text-shadow 1px 1px 1px rgba(0,0,0,0.2) box-shadow 1px 1px 1px rgba(0,0,0,0.3)