.main_tuner_button {
    color: #E2E2E2;
    width: 100%;
    height: 100%;
    text-align: center;
    vertical-align: middle;
    list-style: none;
    margin: 0;
    
/*    padding: 5px 0 6px;*/

    margin: -44% 0 0 0;
    padding: 84% 0 80%;
    float: left;
    border: 1px solid white;
    font-size: 52px;
    font-family: Arvo;
    cursor: pointer;
    background-image: url(/wp-content/plugins/guitar-tuner/img/buttonoff.png);

    display: block;
    background-size:contain;
    background-position:center;
    background-repeat:no-repeat;
  -webkit-touch-callout: none; /* iOS Safari */
  -webkit-user-select: none;   /* Chrome/Safari/Opera */
  -khtml-user-select: none;    /* Konqueror */
  -moz-user-select: none;      /* Firefox */
  -ms-user-select: none;       /* Internet Explorer/Edge */
  user-select: none;  
}
.play.main_tuner_button.active {
    color: white;
    background-image: url(/wp-content/plugins/guitar-tuner/img/buttonon.png);
    display: block;
    background-repeat: no-repeat;
    background-size: contain;
    background-position: center;
    text-shadow: 0px -1px 6px black;
    font-size: 48px;
}
.col-xs-2 {
    width: 16.66666667%;
    float: left;
}
.plug {
    position: absolute;
    top: 52%;
    left: 1%;
}