body{
    height:100vh;
    background:url(../img/entete.jpg) no-repeat top center;
    background-size:cover;
    margin:0;
    position: relative;
}
.container{
    width:100%;
    text-align: center;
    font-family: Arial, Helvetica, sans-serif;
    background:rgba(255, 255, 255, 0.8);
    padding:75px 0;
    position: absolute;
    top: calc(50% - 135px);
    left:0;
}
.container img{
    display: block;
    margin:0 auto;
}