.grid__img--border .tilt__back,
.grid__img--border .tilt__front {
    border: 1px solid #333;
}

.grid__img--border .tilt {
    overflow: visible;
}


.tilt {
    overflow: hidden;
    position: relative;
    width: 100%;
    height: 100%;
    margin: 0 auto;
}

.tilt__back,
.tilt__front {
    width: 100%;
    height: 100%;
    background-position: 50% 50%;
    background-repeat: no-repeat;
    background-size: cover;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.tilt__back {
    position: relative;
}

.tilt__front {
    position: absolute;
    top: 0;
    left: 0;
}