:root {
  --bg: #0f1620;
  --bg-raised: #161f2b;
  --border: #263243;
  --text: #e6ecf3;
  --muted: #9aa9bb;
  --accent: #4bb3a3;
  --accent-strong: #66d3c1;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

code {
  font-family: var(--mono);
  font-size: 0.9em;
}

.site-header {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  max-width: 62rem;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 650;
  font-size: 1.05rem;
  color: var(--text);
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 0.55rem;
  background: var(--accent);
  color: #06121a;
  font-weight: 800;
}

.nav-links {
  display: flex;
  gap: 1.4rem;
  font-size: 0.95rem;
}

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

.nav-links a:hover {
  color: var(--text);
}

main {
  max-width: 62rem;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.hero {
  padding: 4rem 0 3rem;
  border-bottom: 1px solid var(--border);
}

.eyebrow {
  margin: 0 0 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  color: var(--accent);
}

h1 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.lede {
  max-width: 44rem;
  margin: 0;
  font-size: 1.1rem;
  color: var(--muted);
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.button {
  display: inline-block;
  padding: 0.6rem 1.2rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  color: var(--text);
  text-decoration: none;
  font-size: 0.95rem;
}

.button:hover {
  border-color: var(--accent);
}

.button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #06121a;
  font-weight: 600;
}

.section {
  padding: 3rem 0;
  border-bottom: 1px solid var(--border);
}

h2 {
  margin: 0 0 1.5rem;
  font-size: 1.5rem;
  letter-spacing: -0.01em;
}

.card {
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  background: var(--bg-raised);
}

.card h3 {
  margin: 0 0 0.35rem;
  font-size: 1.15rem;
}

.tagline {
  margin: 0 0 1.25rem;
  color: var(--muted);
}

pre {
  margin: 0 0 1.25rem;
  padding: 1rem;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background: #0b1119;
  font-size: 0.85rem;
  line-height: 1.55;
}

pre code {
  font-size: inherit;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin: 1.25rem 0 0;
  font-size: 0.95rem;
}

.muted {
  color: var(--muted);
  font-size: 0.95rem;
}

.principles {
  margin: 0;
  display: grid;
  gap: 1.5rem;
}

.principles dt {
  font-weight: 650;
  margin-bottom: 0.3rem;
}

.principles dd {
  margin: 0;
  color: var(--muted);
  max-width: 48rem;
}

.site-footer {
  max-width: 62rem;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #ffffff;
    --bg-raised: #f6f8fa;
    --border: #d8dee6;
    --text: #16202b;
    --muted: #56657a;
    --accent: #1f7d70;
    --accent-strong: #16645a;
  }

  pre {
    background: #f0f3f6;
  }

  .brand-mark,
  .button.primary {
    color: #ffffff;
  }
}