body {
    font-family: Palatino, Georgia, serif;
    max-width: 40em;
    padding: 1rem;
    margin: 0 auto;
    font-size: 20px;
    color: #000;
    background-color: #fff;
    line-height: 30px;
  }

  h1, h2, h3, header#mainhead {
    font-family: Palatino, Georgia, serif;
    font-style: normal;
    font-weight: normal;
  }

  small {
    color:#666;
  }

  header#mainhead a {
    color: #000;
  }

  a {
    color: #20b;
    text-decoration: none;
    word-wrap: break-word;
  }

  a:hover {
    text-decoration: underline;
  }

  a:visited {
    color: #606;
  }

  h1,h2,h3,label,header#mainhead{
    line-height:1em;
  }

  h1 {
    line-height: 1.1;
  }

  h2 {
    margin-top: 1.5em;
  }

  h3 {
    margin-top: 1.5em;
  }

  section {
    margin-bottom: 4em;
  }

  @media screen and (max-width: 440px) {
    header#mainhead {
      font-size: 2em;
    }
  }
  @media screen and (min-width: 441px) {
    header#mainhead {
      font-size: 3em;
    }
  }
  
  @media (prefers-color-scheme: dark) {
    body {
      background-color: #111;
      color: #ccc;
    }
    a {
      color: #aaccff;
    }
    a:visited {
      color: #ddbbff;
    }
    blockquote {
      color: #aaa;
    }
    .response {
      background-color: #222;
      border-color: #444;
    }
    h1, h2, h3, header#mainhead a {
      color: #b5f89f;
    }
  }