main a {
  display: inline-block;
  width: 30%;
  /* height: 200px;  */
  border : 1px solid rgb(220, 220, 220);
  padding: 10px;
  margin: 10px;
}

main .accueil {
  padding: 30px 50px;
}

main .accueil img {
  width: 100%;
  margin: 0;
  display: block;
  margin-bottom: 10px;
  border : 1px solid rgb(230, 230, 230);
}

@media screen and (max-width : 1100px) {
  main a {
    width: 45%;
  }

}

@media screen and (max-width : 500px) {
  main a {
    width: 90%;
  }
}