.btn .btn__loading-bar {
    background-color:#FFFFFF;
}
.btn.loading{
    position:relative;
}
.btn.loading span{
    opacity:0;
}
.btn.loading .btn__loading-bar{
    margin:0;
}
.btn.loading .btn__loading-wrap{
    margin:0;
    display:block;
}
.btn__loading-wrap{
    display:none;
    width:100%;
    max-width:50px;
    height:2px;
    overflow:hidden;
    position:absolute;
    top:50%;
    left:50%;
    transform:translate(-50%, -50%);
}
.btn__loading-bar{
    width:100%;
    height:2px;
    border-radius:2px;
    animation:loaderLine 1.4s ease-in-out infinite;
}
@keyframes loaderLine{
    0%{
        transform:translateX(-150%);
    }
    45%{
        transform:translateX(0);
    }
    55%{
        transform:translateX(0);
    }
    to{
        transform:translateX(150%);
    }
}