*{
  margin: 0;
  padding: 0;
}

.haut, .bas{
  display: flex;
  justify-content: space-around;
}

.milieu{
  display: flex;
  justify-content: center;
  margin-bottom: 80px;
  margin-top: 80px;
}

h1{
  font-size: 40px;
  text-align: center;
  margin-left: 20%;
  margin-right: 20%;
}

#titreResponsive
{
  display: none;
}

@media screen and (max-width: 700px)
{
  #titreResponsive
  {
    display: flex;
    justify-content: center;
    text-align: center;
    font-size: 40px;
    font-weight: bold;
    margin-top: 4%;
  }

  section
  {
    display: flex;
    flex-direction: column;
  }

  section img
  {
    margin: 15px;
  }

  .haut, .milieu, .bas
  {
  display: flex;
  flex-direction: column;
  margin:0;
  align-items: center;
  }

  h1
  {
    display: none;
  }
}