* {
    margin: 0;
    padding: 0;
}

.livre {
    width: 250px;
    height: 350px;
    background: url(../img/apple-machines1texte.jpg)no-repeat;
    background-size: cover;
    position: relative;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    perspective: 1000px;
    margin-top: 190px;
    margin-bottom: -145px;
}

.cover {
    width: 210px;
    height: 100%;
    position: absolute;
    left: 40px;
    background-color: lightskyblue;
    transform: rotateY(-20deg);
    transform-style: preserve-3d;
    transform-origin: left;
    transition: all .5s ease-in;
}

.livre:hover .cover {
    transform: rotateY(-180deg);
}

figure {
    margin: 0;
    display: block;
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
}

figure.front {
    background: url(../img/Apple-I.jpg)no-repeat;
    background-size: cover;
}

figure.back {
    background: url(../img/inteligencia-03.jpg)no-repeat;
    background-size: cover;
    transform: rotateY(180deg);
}