.lines {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
}
.line {
  position: absolute;
  width: 1px;
  height: 100%;
  top: 0;
  background: rgba(255, 255, 255, 0.1);
  overflow: hidden;
  z-index: 1;
}
.line-grey {
  background: rgba(255, 255, 255, 0.05);
}
.line-left {
  left: 30%;
}

.line-middle {
  left: 50%;
  transform: translateX(-50%);
}

.line-right{
  right: 30%;
}
.line::after {
  content: "";
  display: block;
  position: absolute;
  height: 15vh;
  width: 100%;
  top: -50%;
  left: 0;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0) 0%, #ffffff 75%, #ffffff 100%);
  -webkit-animation: drop 7s 0s infinite;
          animation: drop 7s 0s infinite;
  -webkit-animation-fill-mode: forwards;
          animation-fill-mode: forwards;
  -webkit-animation-timing-function: cubic-bezier(0.4, 0.26, 0, 0.97);
          animation-timing-function: cubic-bezier(0.4, 0.26, 0, 0.97);
}
.line:nth-child(1)::after {
  -webkit-animation-delay: 2s;
          animation-delay: 2s;
}
.line:nth-child(3)::after {
  -webkit-animation-delay: 2.5s;
          animation-delay: 2.5s;
}
.line-grey::after {
  content: "";
  display: block;
  position: absolute;
  height: 15vh;
  width: 1px;
  top: -50%;
  left: 0;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.8) 75%, #ffffff 100%);
  box-shadow: 0 0 10px 1px rgba(255, 255, 255, 0.4);
  -webkit-animation: drop 7s 0s infinite;
          animation: drop 7s 0s infinite;
  -webkit-animation-fill-mode: forwards;
          animation-fill-mode: forwards;
  -webkit-animation-timing-function: cubic-bezier(0.4, 0.26, 0, 0.97);
          animation-timing-function: cubic-bezier(0.4, 0.26, 0, 0.97);
}

@-webkit-keyframes drop {
  0% {
    top: -50%;
  }
  100% {
    top: 110%;
  }
}

@keyframes drop {
  0% {
    top: -50%;
  }
  100% {
    top: 110%;
  }
}