/* Minimal academic-style layout */
:root {
  --text: #24292f;
  --muted: #57606a;
  --border: #d8dee4;
}

* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  color: var(--text);
  max-width: 700px;
  margin: 0 auto;
  padding: 2rem;
}

header {
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
}

h1 { font-size: 1.5rem; }
h2 { font-size: 1.1rem; margin-top: 1.5rem; }

a { color: #0969da; }
a:hover { text-decoration: underline; }

footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}