.ui-arrow-next-page,
.ui-arrow-previous-page {
    width: 30px;
    height: 60px;
    position: absolute;
    top: 50%;
    top: calc(50% - 30px);
    right: -40px;
    z-index: 10;
    background-image: url(/content/flipbook/arrows@2x.png);
    background-size: 60px 120px;
    background-position: 0 0;
    opacity: 0.5;
    -webkit-transition: opacity 0.2s;
    -moz-transition: opacity 0.2s;
    -o-transition: opacity 0.2s;
    -ms-transition: opacity 0.2s;
    transition: opacity 0.2s;
    cursor: pointer;
}

.ui-arrow-previous-page {
    background-position: 30px 0;
    right: auto;
    left: -40px;
}