.slider {
        width: 500px;
        height: 270px;
        background-color: grey;
        margin-left: auto;
        margin-right: auto;
        margin-top: 0px;
        text-align: center;
        overflow: hidden;
      }
      .image-container {
        width: 1500px;
        background-color: black;
        height: 270px;
        clear: both;
        position: relative;
        -webkit-transition: left 2s;
        -moz-transition: left 2s;
        -o-transition: left 2s;
        transition: left 2s;
      }
      .slide {
        float: left;
        margin: 0px;
        padding: 0px;
        position: relative;
      }
      #slide-1:target ~ .image-container {
        left: 0px;
      }
      #slide-2:target ~ .image-container {
        left: -500px;
      }
      #slide-3:target ~ .image-container {
        left: -1000px;
      }
      .buttons {
        position: relative;
        top: -25px;
      }
      .buttons a {
        display: inline-block;
        height: 15px;
        width: 15px;
        border-radius: 50px;
        background-color: #0056B3;
      }