body{overflow:hidden;margin:0;padding:0;background-color:#000}#buttons{position:fixed;bottom:20px;right:20px;display:flex;gap:10px;z-index:1}.button{width:50px;height:50px;text-indent:100%;white-space:nowrap;overflow:hidden;cursor:pointer;opacity:.4}#button-fullscreen{background:no-repeat url(../images/icon_fullscreen.svg);visibility:hidden}#button-mute.is-unmuted{background:no-repeat url(../images/icon_mute.svg)}#button-mute.is-muted{background:no-repeat url(../images/icon_unmute.svg)}