*{
  margin: 0;
  padding: 0;
}

h1
{
  padding-top: 40px;
  padding-bottom: 120px;
}
section
{
  display: flex;
  flex-direction: column;
  align-items: center;
}

section img
{
  margin-left: 80px;
  margin-right: 80px;
}

.haut, .bas
{
  display: flex;
}

#responsiveTitre
{
  display: none;
}

#milieuHaut
{
  padding-top: 40px;
}

@media screen and (max-width: 700px)
{
  section img
  {
    margin: 20px;
  }
  h1
  {
    display: none;
  }

  #responsiveTitre
  {
    display: flex;
    justify-content: center;
    font-size: 40px;
    font-weight: bold;
    margin-top: 4%;
  }

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

}