Element block pseudo-element :before generated with box-shadow 0px 0px 1px rgba(0,0,0,0.5) width 2em padding auto margin auto overflow visible float none font-weight normal position absolute line-height 2em display block cursor pointer height 2em opacity 1 transform outline none background border 1px rgba(0,0,0,1) solid box-sizing content-box text-shadow 1px 1px 0px rgba(255,255,255,0.2) font-size 16px z-index auto border-radius transition