.btn {
    opacity: 80%;
    padding-top: 200px;
}


.etudes {
    width: 700px;
    height: 200px;
    margin-right: 40px;
}

.utilisateurs {
    width: 700px;
    height: 200px;
    
}

.clients {
    width: 700px;
    height: 200px;
    margin-top: 40px;
    margin-right: 40px;
}

.agences {
    width: 700px;
    height: 200px;
    margin-top: 40px;
}