* {
    box-sizing: border-box;
  }

  a:link {
    text-decoration: none;
  }

  a:visited {
    text-decoration: none;
    color: black;
  }

  a:hover {
    text-decoration: underline;
    color: brown;
  }

  a:active {
    text-decoration: underline;
    color: orange;
  }

  header {
    width: 100%;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    text-align: center;
    background-color: #009933;
    color: white;
    padding: 5px;
  }

  nav {
    width: 100%;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    font-size: 15px;
    text-align: center;
    background-color: #b3d98c;
    padding: 20px;
  }

  section {
    width: 100%;
    background-color: #ffffcc;
    padding: 20px;
    text-align: center;
    font-family:'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    height: 900px;
  }

  footer {
    width: 100%;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    background-color: #009933;
    text-align: center;
    color: white;
    padding: 5px;
  }