#customBtn {
        background: url('btn_google_signin_light_normal_web.png');
        display: inline-block;
        background-size: 370px;
        background-repeat: no-repeat;
        background-position: 50%, 50%;
        cursor: pointer;
        width: 370px;
        height: 90px;
        border: 0px;
        padding: 0px;
        display: block;
        margin-left:auto;
        margin-right:auto;
    }
    #customBtn:hover {
        background: url('btn_google_signin_light_focus_web.png');
        display: inline-block;
        background-size: 370px;
        background-repeat: no-repeat;
        background-position: 50%, 50%;
        cursor: pointer;
        width: 370px;
        height: 90px;
        border: 0px;
        padding: 0px;
        display: block;
        margin-left:auto;
        margin-right:auto;
    }
    span.label {
      font-family: serif;
      font-weight: normal;
    }