:root {
  --bg: #0b1220;
  --panel: #111a2e;
  --panel-2: #0e1627;
  --border: #1f2a44;
  --text: #e6edf7;
  --muted: #93a1bd;
  --accent: #3b82f6;
  --accent-2: #60a5fa;
  --code-bg: #0a1020;
  --code-border: #1a2540;
  --ok: #22c55e;
  --warn: #f59e0b;
  --danger: #ef4444;
  --max: 880px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: var(--max); margin: 0 auto; padding: 24px; }

header.site {
  border-bottom: 1px solid var(--border);
  background: var(--panel-2);
  position: sticky;
  top: 0;
  z-index: 10;
}
header.site .inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
header.site .logo {
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.2px;
}
header.site .logo span { color: var(--accent); }
header.site nav a {
  color: var(--muted);
  margin-left: 18px;
  font-size: 14px;
}
header.site nav a:hover { color: var(--text); text-decoration: none; }

h1 { font-size: 32px; line-height: 1.25; margin: 8px 0 12px; }
h2 { font-size: 22px; margin-top: 32px; margin-bottom: 10px; border-top: 1px solid var(--border); padding-top: 24px; }
h3 { font-size: 17px; margin-top: 22px; margin-bottom: 6px; color: var(--text); }

.lead { color: var(--muted); font-size: 17px; margin-bottom: 8px; }

ul, ol { padding-left: 22px; }
li { margin: 4px 0; }

pre, code { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }
code { background: var(--code-bg); border: 1px solid var(--code-border); padding: 1px 6px; border-radius: 4px; font-size: 13.5px; }
pre {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 8px;
  padding: 14px 16px;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.55;
}
pre code { background: transparent; border: 0; padding: 0; }

.cards { display: grid; grid-template-columns: 1fr; gap: 14px; margin-top: 18px; }
@media (min-width: 720px) { .cards { grid-template-columns: 1fr 1fr; } }
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.card:hover { border-color: var(--accent); transform: translateY(-1px); }
.card h3 { margin-top: 0; }
.card p { color: var(--muted); margin: 6px 0 0; font-size: 14.5px; }
.card a.card-link { color: var(--text); }
.card a.card-link:hover { text-decoration: none; }

.cta {
  margin-top: 28px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  padding: 14px 18px;
  color: var(--muted);
  font-size: 14.5px;
}
.cta a { color: var(--accent-2); font-weight: 600; }

.faq details {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  margin: 10px 0;
  background: var(--panel);
}
.faq summary { cursor: pointer; font-weight: 600; }
.faq p { color: var(--muted); margin: 8px 0 4px; }

.kbd {
  display: inline-block;
  border: 1px solid var(--border);
  background: var(--panel);
  padding: 1px 7px;
  border-radius: 4px;
  font-size: 12.5px;
  color: var(--muted);
}

footer.site {
  border-top: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--muted);
  font-size: 13.5px;
  margin-top: 60px;
}
footer.site .inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 22px 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  justify-content: space-between;
}
footer.site a { color: var(--muted); }
footer.site a:hover { color: var(--text); }

.crumbs { color: var(--muted); font-size: 13.5px; margin-bottom: 4px; }
.crumbs a { color: var(--muted); }
.meta { color: var(--muted); font-size: 13.5px; margin-bottom: 18px; }

.toc {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 18px;
  margin: 14px 0 8px;
  font-size: 14.5px;
}
.toc strong { color: var(--text); display: block; margin-bottom: 6px; font-size: 13px; text-transform: uppercase; letter-spacing: 0.4px; color: var(--muted); }
.toc ol { margin: 0; padding-left: 20px; }
.toc a { color: var(--accent-2); }

.note {
  background: var(--panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--warn);
  border-radius: 6px;
  padding: 10px 14px;
  margin: 14px 0;
  color: var(--muted);
  font-size: 14.5px;
}