/* Base typography */
body {
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    Roboto,
    Helvetica,
    Arial,
    sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 2rem;
  color: #111;
  background-color: #fff;
}

/* Content width */
main {
  max-width: 720px;
  margin: 0 auto;
}

/* Headings */
h1,
h2 {
  line-height: 1.25;
}

h1 {
  font-size: 2.2rem;
  margin-bottom: 0.25rem;
}

h2 {
  font-size: 1.4rem;
  margin-top: 2rem;
}

/* Superscript styling for A³RA */
sup {
  font-size: 0.6em;
  vertical-align: super;
}

/* Lists */
ul {
  padding-left: 1.25rem;
}

/* Citation block */
pre {
  background: #f6f8fa;
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.9rem;
}

/* Footer */
footer {
  margin-top: 3rem;
  font-size: 0.85rem;
  color: #444;
}

footer a {
  color: inherit;
  text-decoration: underline;
}