:root {
  color-scheme: light dark;
  --fg: #1b1c1e;
  --muted: #5d6169;
  --bg: #ffffff;
  --card: #f6f7f9;
  --line: #e2e4e9;
  --accent: #12724a;
  --btn-fg: #ffffff;
  --btn-bg: #12724a;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e6e7ea;
    --muted: #a0a4ad;
    --bg: #16181c;
    --card: #1e2126;
    --line: #2c3037;
    --accent: #6fd7a2;
    --btn-fg: #06231a;
    --btn-bg: #6fd7a2;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  padding: 0 1.25rem 4rem;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

main {
  max-width: 44rem;
  margin: 0 auto;
}

/* ---- top bar ---------------------------------------------------------- */

.bar {
  max-width: 44rem;
  margin: 0 auto 2rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--fg);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.brand img { border-radius: 8px; display: block; }

.bar-nav {
  display: flex;
  gap: 1.1rem;
  font-size: 0.9rem;
}

.bar-nav a { color: var(--muted); text-decoration: none; }
.bar-nav a:hover { color: var(--accent); }

/* ---- hero ------------------------------------------------------------- */

.hero {
  text-align: center;
  padding: 1.5rem 0 1rem;
}

.hero-logo {
  display: block;
  margin: 0 auto 1.25rem;
  border-radius: 24px;
}

.lede {
  font-size: 1.08rem;
  color: var(--muted);
  max-width: 34rem;
  margin: 0.75rem auto 1.5rem;
}

.cta-row { margin: 0 0 0.6rem; }

.btn {
  display: inline-block;
  background: var(--btn-bg);
  color: var(--btn-fg);
  text-decoration: none;
  font-weight: 600;
  padding: 0.7rem 1.3rem;
  border-radius: 10px;
}

.btn:hover { filter: brightness(1.08); }

.fine {
  font-size: 0.85rem;
  color: var(--muted);
}

/* ---- content ---------------------------------------------------------- */

h1 {
  font-size: 1.9rem;
  line-height: 1.2;
  margin: 0 0 0.35rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.15rem;
  margin: 2.4rem 0 0.6rem;
}

h3 { font-size: 1rem; margin: 1.5rem 0 0.4rem; }

ul { padding-left: 1.25rem; }
li { margin: 0.3rem 0; }

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

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

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
}

.card p:first-child { margin-top: 0; }
.card p:last-child { margin-bottom: 0; }

.doc-links {
  display: grid;
  gap: 0.75rem;
}

.doc-links a {
  display: block;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--card);
  padding: 0.85rem 1rem;
  text-decoration: none;
  color: var(--fg);
}

.doc-links a:hover { border-color: var(--accent); }
.doc-links a strong { display: block; }
.doc-links a span { color: var(--muted); font-size: 0.9rem; }

/* ---- footer ----------------------------------------------------------- */

footer.site {
  max-width: 44rem;
  margin: 3.5rem auto 0;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-size: 0.85rem;
  color: var(--muted);
}

footer.site p { margin: 0.35rem 0; }

code {
  font-size: 0.9em;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.1em 0.35em;
}