:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1c1c21;
  --muted: #6b7280;
  --accent: #2f6bff;
  --line: #e5e7eb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --fg: #f2f4f8;
    --muted: #9fb0cb;
    --accent: #7fb2ff;
    --line: #1e2a44;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0 auto;
  padding: 32px 20px 80px;
  max-width: 46rem;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

h1 { font-size: 1.9rem; line-height: 1.2; margin: 0 0 4px; }
h2 { font-size: 1.25rem; margin: 2.2em 0 0.6em; }
h3 { font-size: 1.05rem; margin: 1.6em 0 0.4em; }

.updated { color: var(--muted); font-size: 0.9rem; margin: 0 0 2em; }

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

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  padding-bottom: 16px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--line);
  font-size: 0.95rem;
}

.lang {
  margin: 3em 0 1em;
  padding-top: 1.5em;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

ul { padding-left: 1.2em; }
li { margin: 0.35em 0; }

code {
  background: color-mix(in srgb, var(--fg) 8%, transparent);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  font-size: 0.9em;
}

footer {
  margin-top: 4em;
  padding-top: 1.5em;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}