/* Content Flip Style */
.bb-bookblock {
    width: 400px;
    height: 300px;
    position: relative;
    background: #fff;
    z-index: 100;
}

.bb-page {
    width: 50%;
    height: 100%;
    left: 50%;
    position: absolute;

    -webkit-transform-style: preserve-3d;
    -moz-transform-style: preserve-3d;
    -o-transform-style: preserve-3d;
    -ms-transform-style: preserve-3d;
    transform-style: preserve-3d;

    -webkit-transform-origin: left center;
    -moz-transform-origin: left center;
    -o-transform-origin: left center;
    -ms-transform-origin: left center;
    transform-origin: left center;
}

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

.bb-content {
    background: #fff;
}

.bb-inner {
    position: relative;
    width: 100%;
    height: 100%;
}

.bb-overlay, .bb-outer {
    -webkit-backface-visibility: hidden;
    -moz-backface-visibility: hidden;
    -o-backface-visibility: hidden;
    -ms-backface-visibility: hidden;
    backface-visibility: hidden;
}

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

    -webkit-backface-visibility: hidden;
    -moz-backface-visibility: hidden;
    -o-backface-visibility: hidden;
    -ms-backface-visibility: hidden;
    backface-visibility: hidden;
}

.bb-back {
    -webkit-transform: rotateY(-180deg);
    -moz-transform: rotateY(-180deg);
    -o-transform: rotateY(-180deg);
    -ms-transform: rotateY(-180deg);
    transform: rotateY(-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;
    z-index: 1000;
}

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

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

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