Element button pseudo-class :hover generated with box-sizing content-box padding 20px border-radius box-shadow 5px 5px 8px rgba(0,0,0,0.4) width 40px overflow visible position static background margin 5px line-height normal font-weight normal z-index auto cursor pointer display block transform font-size 16px border 4px #000000 solid height 25px transition float left text-shadow 4px 0px 9px rgba(0,0,0,1)