:root {
  --bg: #f7faf8;
  --card: #ffffff;
  --text: #0f1f17;
  --muted: #5b6b63;
  --brand: #16a34a;
  --border: #e3ebe6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1310;
    --card: #121d18;
    --text: #e8f1ec;
    --muted: #9db0a6;
    --brand: #22c55e;
    --border: #1f2e27;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}
main { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
header { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.logo {
  width: 44px; height: 44px; border-radius: 12px; background: var(--brand);
  color: #fff; display: grid; place-items: center; font-size: 30px; font-weight: 700;
}
h1 { font-size: 28px; margin: 0; }
h2 { font-size: 19px; margin: 28px 0 6px; }
p, li { color: var(--text); }
.muted { color: var(--muted); font-size: 14px; }
a { color: var(--brand); }
nav.langs { display: flex; flex-wrap: wrap; gap: 6px; margin: 16px 0 24px; }
nav.langs button {
  border: 1px solid var(--border); background: var(--card); color: var(--text);
  border-radius: 999px; padding: 6px 12px; font: inherit; font-size: 14px; cursor: pointer;
}
nav.langs button[aria-pressed='true'] { background: var(--brand); border-color: var(--brand); color: #fff; }
section.doc { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 8px 20px 20px; }
.js section.doc[hidden] { display: none; }
footer { margin-top: 32px; }