body {
  overflow-x: hidden;
}

.container {
  width: 90vw;
  margin: 20vh auto 15vh auto;
}

.picture {
  min-width: 80vw;
  min-height: 45vw;
  position: relative;
  margin-left: 10vw;
}

.picture span {
  font-size: 8vw;
  font-family: "BO";
  position: absolute;
  opacity: 0.3;
  transition: opacity 0.8s;
}

.picture:hover span {
  opacity: 0.8;
}

.picture:nth-child(odd) span {
  top: 3%;
  left: -13%;
}

.picture:nth-child(even) {
  margin-left: 0;
  margin-right: 10vw;
}

.picture:nth-child(even) span {
  top: 3%;
  right: -13%;
}

.first-picture {
  background-image: url(./08-cover.jpg);
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  margin-bottom: 5vh;
}

.second-picture {
  background-image: url(./08-2.jpg);
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  margin-bottom: 5vh;
}

.third-picture {
  background-image: url(./08-3.jpg);
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  margin-bottom: 5vh;
}

.fourth-picture {
  background-image: url(./08-4.jpg);
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  margin-bottom: 5vh;
}

#titreprojets2 h3 {
  font-size: 6rem;
  color: #d2b068;
}

#titreprojets2 h5 {
  font-size: 24px;
  margin-top: 0;
  font-weight: 500;
  color: rgb(179, 179, 179);
}

#logoint img {
  filter: none;
}

.return-home {
  width: 100%;
  text-align: center;
  position: relative;
  margin-bottom: 10vh;
}

.return-btn {
  display: inline-block;

  line-height: 40px;
  font-size: 24px;

  text-decoration: none;
  color: rgb(29, 29, 29);
  border: 1px solid rgb(29, 29, 29);
  letter-spacing: 2px;
  text-align: center;
  position: relative;
  transition: all 0.35s;
  padding: 1vw 2vw;
  font-weight: 400;
}

.return-btn span {
  position: relative;
  z-index: 2;
}

.return-btn:after {
  position: absolute;
  content: "";
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background: #d2b068;
  transition: all 0.35s;
}

.return-btn:hover {
  color: #fff;
  border: 1px solid white;
  letter-spacing: 0.5vw;
}

.return-btn:hover:after {
  width: 100%;
}

@media only screen and (max-width: 768px) {
  /* For mobile phones: */

  .container {
    width: 100vw;
  }

  .picture {
    margin-left: 0;
    margin-right: 0;
  }

  .picture:nth-child(even) {
    margin-left: 0;
    margin-right: 0;
  }

  .picture span {
    display: none;
  }

  #titreprojets2 h3 {
    font-size: 48px;
  }

  #titreprojets2 h5 {
    font-size: 24px;
    margin-top: 0.5vh;
  }

  .container {
    margin-top: 15vh;
    margin-bottom: 10vh;
  }

  .return-btn {
    font-size: 18px;
  }
}