html {
    font-family: sans-serif;
    background-color: gray;
  }

  body {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    background-color: white;
  }

  header {
    background: url(imgi_3_header.jpg) no-repeat center;
    height: 200px;
  }

  section {
    padding: 20px;
  }

  p {
    line-height: 1.5;
  }

  img {
    display: block;
    margin: 0 auto;
    max-width: 100%;
  }