:root {
  color-scheme: light dark;
  --text: #1a1a1a;
  --muted: #555;
  --border: #ddd;
  --bg: #fff;
  --link: #0a58ca;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #f2f2f2;
    --muted: #aaa;
    --border: #444;
    --bg: #111;
    --link: #6eb6ff;
  }
}

* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  margin: 0;
  padding: 2rem 1rem 3rem;
}

main {
  max-width: 42rem;
  margin: 0 auto;
}

h1 {
  font-size: 1.75rem;
  line-height: 1.25;
  margin: 0 0 0.5rem;
}

h2 {
  font-size: 1.15rem;
  margin: 2rem 0 0.75rem;
  padding-top: 0.25rem;
  border-top: 1px solid var(--border);
}

h2:first-of-type { border-top: none; margin-top: 1.5rem; }

p, li { margin: 0.5rem 0; }

ul, ol { padding-left: 1.25rem; }

.meta {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 1.25rem;
}

.lang-nav {
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.lang-nav a { color: var(--link); }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  margin: 1rem 0;
}

th, td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.65rem;
  text-align: left;
  vertical-align: top;
}

th { background: rgba(127, 127, 127, 0.08); }

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

strong { font-weight: 600; }