:root {
  --bg: #0f1115;
  --fg: #e6e6e6;
  --muted: #9aa0a6;
  --accent: #4f8cff;
  --card: #171a21;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f7f8;
    --fg: #1c1e21;
    --muted: #5f6368;
    --accent: #2563eb;
    --card: #ffffff;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.6;
}

main {
  max-width: 42rem;
  margin: 2rem;
  padding: 2.5rem 3rem;
  background: var(--card);
  border-radius: 12px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
}

.badge {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border: 1px solid var(--accent);
  border-radius: 999px;
  color: var(--accent);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 { margin: 0.5rem 0; font-size: 2.2rem; }

.lead { font-size: 1.15rem; }

code {
  background: rgba(127, 127, 127, 0.15);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.9em;
}

ol { padding-left: 1.3rem; }
li { margin: 0.3rem 0; }

a { color: var(--accent); }

footer {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(127, 127, 127, 0.25);
  color: var(--muted);
  font-size: 0.9rem;
}