html, body {
      margin: 0;
      padding: 0;
    }

    * {
      box-sizing: border-box;
    }

    .slider {
        width: 100%;
       /* margin: 100px auto;*/
    }

    .slick-slide {
      /*margin: 0px 20px;*/
    }

    .slick-slide img {
      width: 100%;
    }

    .slick-prev:before,
    .slick-next:before {
        color: black;
    }