:root {
  color-scheme: light dark;
  --bg: #0b1020;
  --surface: #141b2d;
  --text: #e8edf6;
  --muted: #aeb8c9;
  --border: #2c3650;
  --accent: #6ea8fe;
  --accent-strong: #9ec5fe;
  --max: 72rem;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
  background: var(--bg);
  color: var(--text);
}

a { color: var(--accent-strong); }
a:hover { text-decoration-thickness: 2px; }

.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(11, 16, 32, 0.96);
}

.nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: .9rem;
}

.nav-links a { text-decoration: none; }
.nav-links a[aria-current="page"] { font-weight: 700; }

main, footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

main { padding-bottom: 3rem; }

section {
  padding: 2rem 0;
  border-bottom: 1px solid var(--border);
}

.hero { padding-top: 4rem; }
.hero.compact { padding-top: 3rem; }

.eyebrow {
  margin: 0 0 .5rem;
  color: var(--muted);
  font-size: .95rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
}

h1, h2, h3 {
  line-height: 1.2;
  margin-top: 0;
}

h1 {
  margin-bottom: 1rem;
  font-size: clamp(2.25rem, 8vw, 4.75rem);
}

h2 { font-size: clamp(1.5rem, 4vw, 2.1rem); }

.lead {
  max-width: 52rem;
  color: var(--muted);
  font-size: 1.2rem;
}

.actions { margin-top: 1.5rem; }

.button {
  display: inline-block;
  padding: .75rem 1rem;
  border: 1px solid var(--accent);
  border-radius: .5rem;
  color: var(--text);
  text-decoration: none;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 1rem;
}

.card {
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: .65rem;
  background: var(--surface);
}

pre {
  overflow-x: auto;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: .5rem;
  background: var(--surface);
}

footer {
  padding-top: 2rem;
  padding-bottom: 2.5rem;
  color: var(--muted);
  font-size: .95rem;
}

@media (max-width: 42rem) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero { padding-top: 2.5rem; }
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #ffffff;
    --surface: #f6f8fa;
    --text: #1f2328;
    --muted: #59636e;
    --border: #d0d7de;
    --accent: #0969da;
    --accent-strong: #0969da;
  }

  .site-header { background: rgba(255, 255, 255, 0.96); }
}