:root {
  --bg: #0b1220;
  --card: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #38bdf8;
  --border: #1f2937;
}
* { box-sizing: border-box; }
body {
  margin: 0 auto;
  max-width: 820px;
  padding: 28px 20px 64px;
  font-family: "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}
a { color: var(--accent); }
h1 { margin-top: 0; }
p { color: var(--muted); }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }