:root {
  --bg: #ffffff;
  --fg: #111111;
  --muted: #666666;
  --accent: #0a66ff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e0e0e;
    --fg: #f2f2f2;
    --muted: #999999;
    --accent: #5b9dff;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  line-height: 1.6;
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 4rem 1.25rem;
}

header h1 {
  margin-bottom: 0.25rem;
  font-size: 2rem;
}

.tagline {
  color: var(--muted);
  margin-top: 0;
}

section {
  margin-top: 2.5rem;
}

section h2 {
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-bottom: 0.75rem;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

li + li {
  margin-top: 0.4rem;
}

footer {
  margin-top: 4rem;
  color: var(--muted);
  font-size: 0.85rem;
}