main{
  width: 80%;
  margin: auto;
}

.diapo{
  position: relative;
  overflow: hidden;
}

.elements{
  display: flex;
}

.element{
  flex: 1 0 100%;
  position: relative;
}

.element > a > img{
  width: 100%;


}

.caption{
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  background-color: rgba(255, 255, 255, 0.4);
  padding: 10px;
}

#nav-gauche, #nav-droite{
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: white;
  font-size: 2rem;
  cursor: pointer;
}
#nav-droite{
  right: 0;
}


@media screen and (max-width:1050px) {
  
#nav-gauche, #nav-droite{
  font-size: 6rem;
}
}