:root {
  --bg: #0f172a;
  --card: #111827;
  --border: #243244;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --accent: #22c55e;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: linear-gradient(135deg, #0f172a, #111827 60%, #0b1220);
  color: var(--text);
}
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 20px 48px;
}
h1, h2 { margin-top: 0; }
.subtitle { color: var(--muted); }
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}
.card {
  background: rgba(17, 24, 39, 0.92);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: 0 12px 30px rgba(0,0,0,0.25);
}
pre {
  white-space: pre-wrap;
  word-break: break-word;
  color: #cbd5e1;
}
ul { padding-left: 18px; }