.card{
  display: inline-block;
  width: 30%;
  border: 2px;
  border-radius: 10px;
  margin: 10px;
  padding: 0px;
  box-shadow: 0px 0px 5px black;  
}
.preview{
width: 90%;
margin: 5%;
border-radius:10px ;
box-shadow: 0px 0px 4px black;
}
.contenu{
    margin: 10px;
}
@media screen and (max-width: 600px){
    .card{
        width: 100%;
        display: inline-block;
    }
}
.date{
    float: right;
}
niass1997