pre{position:relative}pre button.clipboard{position:absolute;opacity:0;padding:2px 6px;right:4px;top:4px;width:27px;height:26px;cursor:pointer;background-color:#eee;background-image:linear-gradient(#fcfcfc,#eee);border:1px solid #d5d5d5;border-radius:3px;-webkit-transition:opacity 0.3s ease-in-out;-o-transition:opacity 0.3s ease-in-out;transition:opacity 0.3s ease-in-out}pre:hover button.clipboard{opacity:1}pre button.clipboard:focus{text-decoration:none;border-color:#51a7e8;outline:none;box-shadow:0 0 5px rgb(81 167 232 / .5)}pre button.clipboard:active{background-color:#dcdcdc;background-image:none;border-color:#b5b5b5;box-shadow:inset 0 2px 4px rgb(0 0 0 / .15)}pre button.clipboard:hover{background-color:#ddd;background-image:linear-gradient(#eee,#ddd);border-color:#ccc}pre button.clipboard img{padding:0!important}