body {
    background-color: #f0f7f4;
    font-family:'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
  }
  
  header footer {
    border: 4px solid #090c08;
    text-align: center;
  }

  header {
    padding: 2%;
    padding-top: 0%;
  }
    
  h1, h2 {
    color: #18314f;
    text-align: center;
  }

  h3 {
    color: #18314f;
  }
  
  h4 {
    color: #0090c1;
    text-align: center;
  }
    
  p {
    font-size: 20px;
    color: #0090c1;
    margin-top: auto;
    margin-bottom: auto;
    margin-left: 5%;
    margin-right: 5%;
  }

  button {
    background-color: #5fad41;
    color: antiquewhite;
    padding: 15px 25px;
    border-radius: 15px;
  }

  .widget {
    background-color: #5fad41;
    color: antiquewhite;
    padding: 15px 25px;
    border-radius: 15px;
    margin-left: 640px;
  }
  
  a:hover {
    text-align: center;
    color: #18314f;
  }

  .origin-link {
    background-color: #5fad41;
    color: antiquewhite;
    padding: 15px 25px;
    text-decoration: none;
    border-radius: 15px; 
  }

  .diff-link {
    color: #5fad41;
    background-color: none;
  }
  
  nav{
    text-align: center;
  }

  .instruction {
    display: block;
    margin-left: auto;
    margin-right: auto;
    height: 200px;
  }

  .center {
    text-align: center;
  }

  .size {
    width: 300px;
    height: 50px;
  }

  @media (min-width: 576px) {
    body {
      background-color: #f0f7f4;
      font-family:'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    }
    
    header, footer {
      border: 4px solid #090c08;
      text-align: center;
    }

    header {
      padding: 2%;
    }

    .instruction {
      display: block;
      margin-left: auto;
      margin-right: auto;
      height: 200px;
    }
  
    .center {
      text-align: center;
    }
  
    .size {
      width: 300px;
      height: 50px;
    }
  }