* {
  margin: 0;
  padding: 0;
}

body {
  background-image: url('/images/header_background.png');
  background-size: auto 300px;
  background-attachment: fixed;
  line-height: 1.45em;

  font-family: Times, 'Times New Roman', serif;
}

header {
  background-image: url('/images/header_foreground.png');
  background-repeat: no-repeat;
  background-size: auto 300px;
  height: 300px;
}

header a {
  color: transparent;
  display: block;
  max-height: 500px;
}

main {
  background-color: white;
  padding: 1.414em 4.53em;
  display: flex;
  flex-flow: column;
  align-items: center;
}

h1, h2, h3 {
  font-weight: 400;
  width: 100%;
}
h1 {
  font-size: 2rem;
  line-height: 1.05em;
  max-width: 30rem;
  margin: 0.5em 0 0.5em;
  text-transform: uppercase;
}
h2, h3 {
  max-width: 30rem;
  font-size: 1rem;
  margin: 2em 0;
}

h2 { font-variant: small-caps; }
h3 { font-style: italic; }

ul, ol, img {
  width: 100%;
  margin: 1.414em 0;
  max-width: 30em;
}

p {
  max-width: 30em;
  text-align: justify;
  text-indent: 1.5em;
}

hr + p,
h1 + p,
h2 + p,
h3 + p {
  text-indent: 0;
}

ul, ol { margin-left: 1.414em; }

code {
  background-color: whitesmoke;
  padding: 0.2em 0.5em;
}

pre {
  background-color: whitesmoke;
  padding: 1em;
  font-size: 1.231em;
  max-width: 30em;
  margin: 1.414em 0 1.414em -1em;
}

hr {
  border: 0;
  border-bottom: 1px solid #666;
  width: 30em;
  margin: 1.414em 0;
}

hr.separator {
  width: 100%;
  border-bottom: 10px solid #666;
}

footer,
footer a {
  color: #fff;
  background-color: blue;
}
footer p {
  font-family: arial, sans-serif;
  text-align: left;
  text-indent: 0;
  padding: 1.414em;
}

/* Image and caption sttyles */

p img {
  margin-left: -1.125em;
}

hr + p img,
h1 + p img,
h2 + p img,
h3 + p img {
  margin-left: 0;
}

img {
  width: 100%;
  max-width: 30em;
}

img + em {
  color: #999;
  display: block;
  margin: -1.414em 0 1.414em;
  text-align: right;
}

/* Dark Mode Support */

@media (prefers-color-scheme: dark) {
  main {
    background-color: black;
    color: white;
  }

  code,
  pre {
    background-color: #444;
  }

  a {
    color: #53FFFF;
  }

  a:visited {
    color: #FF55FF;
  }

  hr.separator {
    border-bottom: 10px solid #999;
  }
}