.container {
    background-color: #eee;
}

div {
    background-color: #eee;
    margin: 2em auto;
}

h2 {
    text-align: left;
}

.parent {
    position: relative;
    border: none
}

.img {
    width: 100%;
}

.absolute {
    position: absolute;
    bottom: 8px;
    right: 157px;
    left: 157px;
    top: 310px;
    height: 15px;
    opacity: 0.4;
    background-color: #000;
    text-align: center;
    padding: 1em;
    padding-bottom: 2em;
    color: #fff;
}

.centrer {
    /*display:none;*/
    position: absolute;
    bottom: 8px;
    right: 157px;
    left: 157px;
    top: 0;
    padding: 10em;
    background-color: #000;
    opacity: 0;
    color: #fff;
    transition: all 3s;
    z-index: 2;

}

.parent:hover .centrer {
    opacity: 0.4;
    /*display : inline-block;*/
}