.histoire-ligne{
    text-align: center;
}

.histoire-description{
    text-align: center;
    vertical-align: center;
    font-size: 20px;
    color: #747474;
}

.histoire-date{
    text-align: center;
}

.histoire-img{
    text-align: center;
    display: inline-block;
    margin-bottom: 50px;
}

.histoire-img img{
    border-radius: 10px;
    width:300px;
}

.histoire-img img:hover{
   width:600px;
}

.histoire-titre{
    color: #999999;
    text-align: center;
    font-size: 30px;
}

#logopenet{
    font-weight: bold;
    font-size: 50px;
    color: #0099cc;
}

.logopenetp{
    font-weight: bold;
    color: #0099cc;
    display: inline-block;
}


/****** Timeline HISTORIQUE **********/

.timeline {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  background-color: #EDEFEF;
}

.timeline::after {
  content: '';
  position: absolute;
  width: 6px;
  background-color: white;
  top: 0;
  bottom: 0;
  left: 50%;
  margin-left: -3px;
}

.timelinecontainer {
  padding: 10px 40px;
  position: relative;
  background-color: inherit;
  width: 50%;
}

.timelinecontainer::after {
  content: '';
  position: absolute;
  width: 25px;
  height: 25px;
  right: -17px;
  background-color: white;
  border: 4px solid #0099cc;
  top: 15px;
  border-radius: 50%;
  z-index: 1;
}

.timelineleft {
  left: 0;
}

.timelineright {
  left: 50%;
}

.timelineleft::before {
  content: " ";
  height: 0;
  position: absolute;
  top: 22px;
  width: 0;
  z-index: 1;
  right: 30px;
  border: medium solid white;
  border-width: 10px 0 10px 10px;
  border-color: transparent transparent transparent white;
}

.timelineright::before {
  content: " ";
  height: 0;
  position: absolute;
  top: 22px;
  width: 0;
  z-index: 1;
  left: 30px;
  border: medium solid white;
  border-width: 10px 10px 10px 0;
  border-color: transparent white transparent transparent;
}

.timelineright::after {
  left: -16px;
}

.timelinecontent {
  padding: 20px 30px;
  background-color: white;
  position: relative;
  border-radius: 6px;
}

@media screen and (max-width: 600px) {

  .timeline::after {
    left: 31px;
  }

  .timelinecontainer {
    width: 100%;
    padding-left: 70px;
    padding-right: 25px;
  }

  .timelinecontainer::before {
    left: 60px;
    border: medium solid white;
    border-width: 10px 10px 10px 0;
    border-color: transparent white transparent transparent;
  }

  .timelineleft::after, .timelineright::after {
    left: 15px;
  }

  .timelineright {
    left: 0%;
  }
}

.timelineimage {
  display: block;
  width: 100%;
  height: auto;
}

.timelineoverlay {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  height: 100%;
  width: 100%;
  opacity: 0;
  transition: .5s ease;
  background-color: #008CBA;
}

.timelineoverlaycontainer:hover .timelineoverlay {
  opacity: 1;
}

.timelinetext {
  width: 90%;
  color: white;
  font-size: 20px;
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
  text-align: center;
}