.bb-bookblock {
    width: 850px;
    height: 685px;
    margin: 0 auto;
    position: relative;
    z-index: 100;
    -webkit-perspective: 607px;
    -moz-perspective: 607px;
    perspective: 607px;
    -webkit-backface-visibility: hidden;
    -moz-backface-visibility: hidden;
    backface-visibility: hidden;
}

.bb-page {
    position: absolute;
    -webkit-transform-style: preserve-3d;
    -moz-transform-style: preserve-3d;
    transform-style: preserve-3d;
    -webkit-transition-property: -webkit-transform;
    -moz-transition-property: -moz-transform;
    transition-property: transform;
}

.bb-vertical .bb-page {
    width: 50%;
    height: 100%;
    left: 50%;
    -webkit-transform-origin: left center;
    -moz-transform-origin: left center;
    transform-origin: left center;
}

.bb-horizontal .bb-page {
    width: 100%;
    height: 50%;
    top: 50%;
    -webkit-transform-origin: center top;
    -moz-transform-origin: center top;
    transform-origin: center top;
}

.bb-page>div,
.bb-outer,
.bb-content,
.bb-inner {
    position: absolute;
    height: 100%;
    width: 100%;
    top: 0;
    left: 0;
    background: #fff;
}

.bb-vertical .bb-content {
    width: 200%;
}

.bb-horizontal .bb-content {
    height: 200%;
}

.bb-page>div {
    width: 100%;
    -webkit-transform-style: preserve-3d;
    -moz-transform-style: preserve-3d;
    transform-style: preserve-3d;
}

.bb-page>div:not(:only-child) {
    -webkit-backface-visibility: hidden;
    -moz-backface-visibility: hidden;
    backface-visibility: hidden;
}

.bb-vertical .bb-back {
    -webkit-transform: rotateY(-180deg);
    -moz-transform: rotateY(-180deg);
    transform: rotateY(-180deg);
}

.bb-horizontal .bb-back {
    -webkit-transform: rotateX(-180deg);
    -moz-transform: rotateX(-180deg);
    transform: rotateX(-180deg);
}

.bb-outer {
    width: 100%;
    overflow: hidden;
    z-index: 999;
}

.bb-overlay,
.bb-flipoverlay {
    background-color: rgba(0, 0, 0, 0.7);
    position: absolute;
    top: 0px;
    left: 0px;
    width: 100%;
    height: 100%;
    opacity: 0;
}

.bb-flipoverlay {
    background-color: rgba(0, 0, 0, 0.2);
}


/* */

.bb-bookblock.bb-vertical>div.bb-page:first-child,
.bb-bookblock.bb-vertical>div.bb-page:first-child .bb-back {
    -webkit-transform: rotateY(180deg);
    -moz-transform: rotateY(180deg);
    transform: rotateY(180deg);
}

.bb-bookblock.bb-horizontal>div.bb-page:first-child,
.bb-bookblock.bb-horizontal>div.bb-page:first-child .bb-back {
    -webkit-transform: rotateX(180deg);
    -moz-transform: rotateX(180deg);
    transform: rotateX(180deg);
}


/* Content display */

.bb-vertical .bb-front .bb-content {
    left: -100%;
}

.bb-horizontal .bb-front .bb-content {
    top: -100%;
}


/* Flipping classes */

.bb-vertical .bb-flip-next,
.bb-vertical .bb-flip-initial {
    -webkit-transform: rotateY(-180deg);
    -moz-transform: rotateY(-180deg);
    transform: rotateY(-180deg);
}

.bb-vertical .bb-flip-prev {
    -webkit-transform: rotateY(0deg);
    -moz-transform: rotateY(0deg);
    transform: rotateY(0deg);
}

.bb-horizontal .bb-flip-next,
.bb-horizontal .bb-flip-initial {
    -webkit-transform: rotateX(180deg);
    -moz-transform: rotateX(180deg);
    transform: rotateX(180deg);
}

.bb-horizontal .bb-flip-prev {
    -webkit-transform: rotateX(0deg);
    -moz-transform: rotateX(0deg);
    transform: rotateX(0deg);
}

.bb-vertical .bb-flip-next-end {
    -webkit-transform: rotateY(-15deg);
    -moz-transform: rotateY(-15deg);
    transform: rotateY(-15deg);
}

.bb-vertical .bb-flip-prev-end {
    -webkit-transform: rotateY(-165deg);
    -moz-transform: rotateY(-165deg);
    transform: rotateY(-165deg);
}

.bb-horizontal .bb-flip-next-end {
    -webkit-transform: rotateX(15deg);
    -moz-transform: rotateX(15deg);
    transform: rotateX(15deg);
}

.bb-horizontal .bb-flip-prev-end {
    -webkit-transform: rotateX(165deg);
    -moz-transform: rotateX(165deg);
    transform: rotateX(165deg);
}

.bb-item {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    display: none;
    background: #fff;
}


/* No JS */

.no-js .bb-bookblock,
.no-js ul.bb-custom-grid li {
    width: auto;
    height: auto;
}

.no-js .bb-item {
    display: block;
    position: relative;
}


/*add*/

.bb-item img {
    width: 100%;
    cursor: pointer;
}

.bookguide {
    text-align: center;
    margin-top: 15px;
}

.bookguide div {
    cursor: pointer;
    display: inline-block;
    margin: 0 5px;
    vertical-align: middle;
}