.demo-block {
    border-top: solid 1px #dcdcdc;
    border-bottom: solid 1px #dcdcdc;
}

.flip-book {
    box-shadow: 0 0 20px 0 rgba(0, 0, 0, 0.5);
    margin: 0 auto;
    display: none;
}

.page {
    /* padding: 25px 40px; */
    background-color: #fdfaf7;
    /* color: #785e3a; */
    /* border: solid 1px #c2b5a3; */
    overflow: hidden;
}

    .page .page-content {
        /* width: 100%; */
        height: 100%;
        display: flex;
        flex-direction: column;
        /*   justify-content: space-between;*/
        align-items: stretch;
        padding: 30px 40px;
    }

        .page .page-content .page-header {
            height: 30px;
            font-size: 100%;
            text-transform: uppercase;
            text-align: center;
        }

        .page .page-content .page-image {
            height: 100%;
            background-size: contain;
            background-position: center center;
            background-repeat: no-repeat;
        }

        .page .page-content .page-text {
            height: 100%;
            flex-grow: 1;
            font-size: 80%;
            text-align: justify;
            margin-top: 10px;
            padding-top: 10px;
            box-sizing: border-box;
            border-top: solid 1px #f4e8d7;
        }

        .page .page-content .page-footer {
            height: 30px;
            border-top: solid 1px #f4e8d7;
            font-size: 80%;
            color: #998466;
        }

    .page.--left {
        border-right: 0;
        /* box-shadow: inset -7px 0 30px -7px rgba(0, 0, 0, 0.4); */
        background: url(../images/trang1.png) center center no-repeat;
        background-size: contain;
    }

    .page.--right {
        border-left: 0;
        /* box-shadow: inset 7px 0 30px -7px rgba(0, 0, 0, 0.4); */
        background: url(../images/trang2.png) center center no-repeat;
        background-size: contain;
    }

        .page.--right .page-footer {
            text-align: right;
        }
/*! CSS Used from: Embedded */
.stf__wrapper {
    position: relative;
    display: block;
    box-sizing: border-box;
    transform: translateZ(0);
}

    .stf__wrapper canvas {
        position: absolute;
        width: 100%;
        height: 100%;
        left: 0;
        top: 0;
    }

.stf__block {
    position: absolute;
    width: 100%;
    height: 100%;
    box-sizing: border-box;
}

.stf__item {
    display: none;
    position: absolute;
}