:root {
  color-scheme: dark;
  --bg: #0b1020;
  --panel: #121933;
  --text: #e8ecff;
  --muted: #9aa6d1;
  --accent: #7dd3fc;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, system-ui, sans-serif;
  background: radial-gradient(circle at top, #18224a 0, var(--bg) 60%);
  color: var(--text);
}
.shell {
  max-width: 760px;
  margin: 8vh auto;
  padding: 2rem;
  background: color-mix(in srgb, var(--panel) 88%, transparent);
  border: 1px solid rgba(125, 211, 252, 0.18);
  border-radius: 20px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent);
  font-size: 0.75rem;
}
.lede, li { color: var(--muted); }
code {
  background: rgba(255,255,255,0.08);
  padding: 0.15rem 0.4rem;
  border-radius: 6px;
}