*{
      margin:0;
      padding:0;
      box-sizing:border-box;
    }

    body{
      background:#000;
      font-family:Arial, sans-serif;
    }

    img{
      width:100%;
      display:block;
    }

    /* HEADER */
    .header-image img{
      width:100%;
      height:auto;
      object-fit:cover;
    }

    /* BODY */
    .image-block{
      width:100%;
    }

    .image-block img{
      width:100%;
      height:auto;
      object-fit:cover;
    }

    /* FOOTER */
    .footer-image img{
      width:100%;
      height:auto;
      object-fit:cover;
    }