.pswp__button--arrow--left::before, .pswp__button--arrow--right::before {
    content: '';
    top: 10px;
    background-color: rgba(0, 0, 0, 0.3);
    height: 68px;
    width: 80px;
    position: absolute;
}

.pswp__button--arrow--left::before, .pswp__button--arrow--right::before {
    background: url(arrows.png) 0 0 no-repeat;
	background-color: rgba(0, 0, 0, 0);
	background-position-x: 0px;
	background-position-y: 0px;
	background-size: auto;
    background-size: 160px 68px;
}

.pswp__button--arrow--right::before {
	background-position-x: -100px;
}

.pswp__button--arrow--left, .pswp__button--arrow--right {
    background: none;
    top: 50%;
    margin-top: -50px;
    width: 70px;
    height: 90px;
    position: absolute;
}