.scroll-down {
    position: absolute;
    left: 50%;
    bottom: 100px;
    display: block;
    text-align: center;
    font-size: 20px;
    z-index: 100;
    text-decoration: none;
    text-shadow: 0;
    width: 17px;
    height: 17px;
    border-bottom: 2px solid white;
    border-right: 2px solid white;
    -webkit-transform: translate(-50%, 0%) rotate(45deg);
    -moz-transform: translate(-50%, 0%) rotate(45deg);
    transform: translate(-50%, 0%) rotate(45deg);
    -webkit-animation: fade_move_down 2s ease-in-out infinite;
    -moz-animation: fade_move_down 2s ease-in-out infinite;
    animation: fade_move_down 2s ease-in-out infinite;
    cursor: pointer;

  }


  @-webkit-keyframes fade_move_down {
    0% {
      -webkit-transform: translate(0, -10px) rotate(45deg);
      opacity: 0;
    }

    50% {
      opacity: 1;
    }

    100% {
      -webkit-transform: translate(0, 10px) rotate(45deg);
      opacity: 0;
    }
  }

  @-moz-keyframes fade_move_down {
    0% {
      -moz-transform: translate(0, -10px) rotate(45deg);
      opacity: 0;
    }

    50% {
      opacity: 1;
    }

    100% {
      -moz-transform: translate(0, 10px) rotate(45deg);
      opacity: 0;
    }
  }

  @keyframes fade_move_down {
    0% {
      transform: translate(0, -10px) rotate(45deg);
      opacity: 0;
    }

    50% {
      opacity: 1;
    }

    100% {
      transform: translate(0, 10px) rotate(45deg);
      opacity: 0;
    }
  }