:root {
  --bg: #0b1220;
  --panel: #111a2e;
  --text: #e6ecf5;
  --muted: #9fb0c8;
  --accent: #4cc9f0;
  --line: #22304d;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
header, main, footer { max-width: 780px; margin: 0 auto; padding: 0 20px; }
header { padding-top: 40px; display: flex; align-items: center; gap: 14px; }
.logo {
  width: 44px; height: 44px; border-radius: 50%;
  background: radial-gradient(circle, #bff3ff 0 18%, var(--accent) 19% 42%, #0e2a3d 43% 100%);
  box-shadow: 0 0 18px rgba(76, 201, 240, 0.5);
}
header a.brand { color: var(--text); text-decoration: none; font-weight: 700; font-size: 1.25rem; }
nav { margin-left: auto; display: flex; gap: 18px; }
nav a { color: var(--muted); text-decoration: none; }
nav a:hover, nav a[aria-current="page"] { color: var(--accent); }
main { padding-top: 24px; padding-bottom: 40px; }
h1 { font-size: 2rem; margin: 24px 0 8px; }
h2 { font-size: 1.2rem; margin-top: 32px; color: var(--accent); }
p.lead { color: var(--muted); font-size: 1.1rem; }
a { color: var(--accent); }
.card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 12px; padding: 18px 22px; margin: 18px 0;
}
code { background: #0a1426; padding: 1px 6px; border-radius: 5px; font-size: 0.92em; }
table { width: 100%; border-collapse: collapse; margin: 12px 0; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; }
footer { border-top: 1px solid var(--line); padding: 20px; color: var(--muted); font-size: 0.9rem; }