#timeline {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  background-color: #031625;
}
#timeline:hover .tl-item {
  width: 23.3333%;
}

.tl-item {
  -webkit-transform: translate3d(0, 0, 0);
          transform: translate3d(0, 0, 0);
  position: relative;
  width: 30%;
  height: 70vh;
  min-height: 400px;
  color: #fff;
  overflow: hidden;
  -webkit-transition: width 0.5s ease;
  transition: width 0.5s ease;
}
.tl-item:before, .tl-item:after {
  -webkit-transform: translate3d(0, 0, 0);
          transform: translate3d(0, 0, 0);
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
}
.tl-item:after {
  background: rgba(3, 22, 37, 0.85);
  opacity: 1;
  -webkit-transition: opacity 0.5s ease;
  transition: opacity 0.5s ease;
}
.tl-item:before {
  background: -moz-linear-gradient(bottom, rgba(5,5,5,1) 0%, rgba(179,179,179,0) 35%, rgba(255,255,255,0) 75%); /* FF3.6-15 */
background: -webkit-linear-gradient(bottom, rgba(5,5,5,1) 0%,rgba(179,179,179,0) 35%,rgba(255,255,255,0) 75%); /* Chrome10-25,Safari5.1-6 */
background: linear-gradient(to top, rgba(5,5,5,1) 0%,rgba(179,179,179,0) 39%,rgba(255,255,255,0) 56%); /* W3C, IE10+, FF16+, Chrome26+, Opera12+, Safari7+ */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#050505', endColorstr='#00ffffff',GradientType=0 ); /* IE6-9 */
  z-index: 1;
  opacity: 0;
  -webkit-transform: translate3d(0, 0, 0) translateY(30%);
          transform: translate3d(0, 0, 0) translateY(30%);
  -webkit-transition: opacity 0.5s ease, -webkit-transform 0.5s ease;
  transition: opacity 0.5s ease, -webkit-transform 0.5s ease;
  transition: opacity 0.5s ease, transform 0.5s ease;
  transition: opacity 0.5s ease, transform 0.5s ease, -webkit-transform 0.5s ease;
}
.tl-item:hover {
  width: 50% !important;
}
.tl-item:hover:after {
  opacity: 0;
}
.tl-item:hover:before {
  opacity: 1;
  -webkit-transform: translate3d(0, 0, 0) translateY(0);
          transform: translate3d(0, 0, 0) translateY(0);
  -webkit-transition: opacity 1s ease, -webkit-transform 1s ease 0.25s;
  transition: opacity 1s ease, -webkit-transform 1s ease 0.25s;
  transition: opacity 1s ease, transform 1s ease 0.25s;
  transition: opacity 1s ease, transform 1s ease 0.25s, -webkit-transform 1s ease 0.25s;
}
.tl-item:hover .tl-content {
  opacity: 1;
  -webkit-transform: translateY(0);
          transform: translateY(0);
  -webkit-transition: all 0.75s ease 0.5s;
  transition: all 0.75s ease 0.5s;
}
.tl-item:hover .tl-bg {
  -webkit-filter: grayscale(0);
          filter: grayscale(0);
}

.tl-item:hover .tl-year p {

  color: #000000;

}




.tl-content {
  -webkit-transform: translate3d(0, 0, 0) translateY(25px);
          transform: translate3d(0, 0, 0) translateY(25px);
  position: relative;
  z-index: 1;
 
  margin: 0 1.618em;
  top: 80%;
  opacity: 0;
}
.tl-content h1 {
  font-family: 'Open sans',Helvetica Neue,Helvetica,Arial,sans-serif;
  text-transform: uppercase;
  color: #d8dce1;
  font-size: 1rem;
  font-weight: normal;
}

.tl-year {
  position: absolute;
  top: 7%;
  left: 50%;
  -webkit-transform: translateX(-50%) translateY(-50%);
          transform: translateX(-50%) translateY(-50%);
  z-index: 1;

}
.tl-year p {
  font-family: 'open sans',sans-serif;
  font-size: 1.2rem;
  color: #D8DCE1;
  line-height: 0;
}

.tl-bg {
  -webkit-transform: translate3d(0, 0, 0);
          transform: translate3d(0, 0, 0);
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  background-size: cover;
  background-position: center center;
  -webkit-transition: -webkit-filter 0.5s ease;
  transition: -webkit-filter 0.5s ease;
  transition: filter 0.5s ease;
  transition: filter 0.5s ease, -webkit-filter 0.5s ease;
  -webkit-filter: grayscale(100%);
          filter: grayscale(100%);
}