html, body {
    margin: 0;
    height: 100%;
    background-color: #f9f9f9;
}

    body.hide-overflow {
        overflow: hidden;
    }

.t {
    display: table;
    width: 100%;
    height: 100%;
}

.tc {
    display: table-cell;
    vertical-align: middle;
    text-align: center;
}

.rel {
    position: relative;
}

.book {
    margin: 0 auto;
    width: 90%;
    height: 90%;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

    .book .page {
        height: 100%;
    }

        .book .page img {
            max-width: 100%;
            height: 100%;
        }