body {
    background-image: url(madera.jpg);
}

.logo {
    width: 330px;
    height: 200px;
}

.header {
    margin-top: 90px;
    margin-bottom: 30px;
}

.containerBooks {
    margin: 0 90px;
}

.header.row.containerBooks {
    margin-top: 27px;
}

/* entire container, keeps perspective */

.flip-container {
    perspective: 1000px;
}

/* flip the pane when hovered */

.flip-container:hover .flipper,
.flip-container.hover .flipper {
    transform: rotateY(180deg);
}

.flip-container,
.front,
.back {
    width: 270px;
    height: 430px;
}

/* flip speed goes here */

.flipper {
    transition: 1.6s;
    transform-style: preserve-3d;
    position: relative;
}

/* hide back of pane during swap */

.front,
.back {
    backface-visibility: hidden;
    position: absolute;
    top: 0;
    left: 0;
    color: white;
    font-family: cursive;
}

/* front pane, placed above back */

.front {
    z-index: 2;
    /* for firefox 31 */
    transform: rotateY(0deg);
}

/* back, initially hidden pane */

.back {
    transform: rotateY(180deg);
    background-color: darkred;
}

.imgCover {

    width: 100%;
}

.botto {

    text-align: center;
    margin-top: 40px;
}

.textBack {
    padding: 20px;
}

.logoText {
    font-family: 'Eater', cursive;
    font-size: 94px;
    color: whitesmoke;
}