:root {
  --bg: #0b0f19;
  --card: rgba(255, 255, 255, 0.06);
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.72);
  --border: rgba(255, 255, 255, 0.12);
  --accent: #7c5cff;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background:
    radial-gradient(800px 500px at 20% 10%, rgba(124,92,255,0.30), transparent 60%),
    radial-gradient(800px 500px at 80% 30%, rgba(45,212,191,0.18), transparent 55%),
    var(--bg);
}

.wrap { max-width: 920px; margin: 0 auto; padding: 56px 18px; }
header { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { font-weight: 800; letter-spacing: 0.2px; font-size: 22px; }
nav a { color: var(--muted); text-decoration: none; margin-left: 14px; }
nav a:hover { color: var(--text); }

.hero { margin-top: 44px; padding: 22px; border: 1px solid var(--border); border-radius: 18px; background: var(--card); }
.hero h1 { margin: 0 0 8px; font-size: 34px; }
.hero p { margin: 0; color: var(--muted); line-height: 1.6; }

.grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 14px; margin-top: 18px; }
.card {
  grid-column: span 6;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: rgba(255,255,255,0.04);
  padding: 18px;
}
.card h2 { margin: 0 0 6px; font-size: 16px; }
.card p { margin: 0 0 10px; color: var(--muted); line-height: 1.6; }

.btn {
  display: inline-block;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  color: var(--text);
  text-decoration: none;
  background: rgba(255,255,255,0.04);
}
.btn:hover { border-color: rgba(124,92,255,0.6); }

.doc {
  margin-top: 18px;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: rgba(255,255,255,0.04);
}
.doc h1 { margin: 0 0 10px; font-size: 28px; }
.doc h2 { margin: 18px 0 8px; font-size: 16px; }
.doc p, .doc li { color: var(--muted); line-height: 1.7; }
.doc code { color: rgba(255,255,255,0.85); }
.doc a { color: rgba(124,92,255,0.95); }

footer { margin-top: 28px; color: var(--muted); font-size: 13px; }

@media (max-width: 720px) {
  .card { grid-column: span 12; }
  .hero h1 { font-size: 28px; }
}