.slider1 {
  background-image: url('/img/accueil/crash-denis-pourcher.jpg'); background-size:cover; background-position: center; height: 100vh; width: 100vw;
}
.slider2 {
  background-image: url('/img/accueil/paris-vichy-denis-pourcher.jpg'); background-size:cover; background-position: center; height: 100vh; width: 100vw;
}
.slider3 {
  background-image: url('/img/accueil/morgan-douglas-denis-pourcher.jpg'); background-size:cover; background-position: center; height: 100vh; width: 100vw;
}