.container {
  margin: 0 auto;
  width: 95%;
}
.conteneur {
  margin: 0 auto;
  width: 75%;
}

.conteneur1 {
  margin: 0 auto;
  width: 75%;
}
.conteneur2 {
  margin: 0 auto;
  width: 75%;
}
.conteneur3 {
  margin: 0 auto;
  width: 75%;
}
nav, footer {
  background-color: #333;
  color: #fff;
  text-align: center;
}

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

nav > a {
  flex: 1;
  text-align: center;
  text-decoration: none;
  color: #fff;
}

@media only screen and (min-width: 768px) {
  nav { flex-direction: row; }

  .projet-container { display: flex; }

  .projet-container .projet-list { width: 25%; }

  .projet-container .projet { flex: 1; }}

@media only screen and (min-width: 768px) {
  nav { flex-direction: row; }

  .film-conteneur { display: flex; }

  .film-conteneur .film-list { width: 25%; }

  .film-conterneur .film { flex: 1; }}

@media only screen and (min-width: 768px) {
  nav { flex-direction: row; }

  .roman-conteneur1 { display: flex; }

  .roman-conteneur1 .roman-list { width: 25%; }

  .roman-conteneur1 .roman { flex: 1; }}

@media only screen and (min-width: 768px) {
  nav { flex-direction: row; }

  .nouvelle-conteneur2 { display: flex; }

  .nouvelle-conteneur2 .nouvelle-list { width: 25%; }

  .nouvelle-conteneur2 .nouvelle { flex: 1; }

  @media only screen and (min-width: 768px) {
    nav { flex-direction: row; }

    .press-conteneur3 { display: flex; }

    .press-conteneur3 .press-list { width: 35%; }

    .press-conteneur3 .press{ flex: 1; }


.responsive {
  max-width: 100%;
  height: auto;
}