#video-voice_btns.muted #video-muted_btn {
    display: none;
}

#video-voice_btns.muted  #video-voice_btn {
    display: block;
}

#video-voice_btn {
    display: none;
}

#video-muted_btn {
    cursor: pointer;
    display: block;
} 


#video-voice_btn img {
    height: 30px
}

#video-muted_btn img {
    height: 30px
}

#video-voice_btn {
    cursor: pointer;
}