:root {
  color-scheme: dark;
  font-family: ui-sans-serif, system-ui, -apple-system, sans-serif;
  --bg: #0b1220;
  --card: #111827;
  --border: #334155;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #fbbf24;
  --ok: #4ade80;
  --bad: #f87171;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); line-height: 1.5; }
a { color: var(--accent); }
main { max-width: 820px; margin: 0 auto; padding: 1.5rem 1.25rem 3rem; }
nav {
  display: flex; flex-wrap: wrap; gap: 0.75rem 1.1rem; align-items: center;
  padding: 0.9rem 1.25rem; border-bottom: 1px solid var(--border);
  background: #0f172a; position: sticky; top: 0; z-index: 10;
}
nav .brand { font-weight: 800; color: var(--accent); text-decoration: none; margin-right: auto; }
nav a { text-decoration: none; color: var(--muted); font-size: 0.92rem; }
nav a:hover { color: var(--accent); }
h1 { color: var(--accent); font-size: 1.75rem; margin: 0.4rem 0 0.5rem; }
h2 { font-size: 1.15rem; margin: 1.4rem 0 0.5rem; color: var(--accent); }
.muted { color: var(--muted); }
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; padding: 1rem 1.1rem; margin: 1rem 0;
}
code, pre {
  background: #0b1220; border-radius: 6px; font-size: 0.85rem;
}
code { padding: 0.12rem 0.35rem; }
pre { padding: 0.85rem 1rem; overflow-x: auto; border: 1px solid var(--border); }
.btn {
  display: inline-block; background: #b45309; color: #fff; border: 0;
  border-radius: 8px; padding: 0.55rem 0.95rem; font-weight: 700;
  cursor: pointer; font-size: 0.9rem; text-decoration: none;
}
.btn.secondary { background: #334155; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.row { display: flex; flex-wrap: wrap; gap: 0.6rem; align-items: center; }
.pill {
  display: inline-block; padding: 0.15rem 0.55rem; border-radius: 999px;
  font-size: 0.75rem; font-weight: 700; background: #1e293b; color: #cbd5e1;
}
.pill.ok { background: #14532d; color: #86efac; }
.pill.bad { background: #7f1d1d; color: #fecaca; }
.msg { font-size: 0.85rem; margin-top: 0.5rem; }
.msg.err { color: var(--bad); }
.msg.ok { color: var(--ok); }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 0.75rem; }
@media (max-width: 640px) {
  h1 { font-size: 1.4rem; }
  main { padding: 1rem; }
}