:root {
  color-scheme: light dark;
  --fg: #1b1f24;
  --bg: #ffffff;
  --muted: #57606a;
  --accent: #0b5cad;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e6edf3;
    --bg: #0d1117;
    --muted: #9da7b1;
    --accent: #6cb6ff;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.6;
}

main {
  max-width: 40rem;
  margin: 0 auto;
  padding: 3rem 1rem;
  overflow-wrap: anywhere;
}

h1 {
  font-size: clamp(2rem, 8vw, 3rem);
  line-height: 1.15;
  margin: 0 0 1.5rem;
}

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

footer {
  margin-top: 2.5rem;
  color: var(--muted);
  font-size: 0.875rem;
}

code {
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
}