.lektion-wrapper{}.video-wrapper{position:relative;display:initial}button#videoaudio{position:absolute;bottom:30px;right:30px;background:initial;border:initial}button#videoaudio:before{content:'x';content:'🔈';font-family:'ETmodules';color:white;font-size:30px;filter:grayscale(100%)}button#videoaudio:hover{cursor:pointer}button#videoaudio.unmuted:before{content:'z';content:'🔊'}button#videoaudio.unmuted.muted:before{content:'x';content:'🔈'}