@charset "utf-8";.yt{ position: relative }.yt_play:hover{ cursor: pointer }.yt_play:before{ position: absolute; background: url(../img/youtube_icon_black.png); content: ""; background-size: 100%; width: 70px; height: 50px; top: 50%; left: 50%; transform: translate(-50%, -50%); opacity: .9; transition: .5s }.yt_play:hover:before{ cursor: pointer; background-image: url(../img/youtube_icon_red.png) }