:root {
  color-scheme: light dark;
  --bg: #0f1419;
  --bg-card: #1a2332;
  --text: #eef2f7;
  --muted: #9aa8bc;
  --accent: #5b9dff;
  --border: rgba(255, 255, 255, 0.08);
  --max: 720px;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Helvetica Neue", sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f4f6fa;
    --bg-card: #ffffff;
    --text: #1a2332;
    --muted: #5c6b80;
    --accent: #0066cc;
    --border: rgba(0, 0, 0, 0.08);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: linear-gradient(160deg, var(--bg) 0%, #162033 100%);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
}

a { color: var(--accent); }

.page {
  max-width: var(--max);
  margin: 0 auto;
  padding: 40px 20px 64px;
}

.hero .eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.8rem;
  color: var(--accent);
  margin: 0 0 8px;
}

.hero h1 {
  margin: 0 0 12px;
  font-size: 2rem;
  font-weight: 700;
}

.lead {
  font-size: 1.05rem;
  color: var(--muted);
  margin: 0 0 8px;
}

.meta, .muted { color: var(--muted); }

.card-grid {
  display: grid;
  gap: 16px;
  margin: 32px 0;
}

.card {
  display: block;
  padding: 20px 22px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  text-decoration: none;
  color: inherit;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.card h2 {
  margin: 0 0 6px;
  font-size: 1.15rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.doc h1 {
  margin: 0 0 8px;
  font-size: 1.85rem;
}

.doc .updated {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 28px;
}

.doc h2 {
  margin: 28px 0 10px;
  font-size: 1.15rem;
}

.doc p, .doc li {
  color: var(--text);
}

.doc ul {
  padding-left: 1.25rem;
}

.doc li { margin-bottom: 8px; }

.contact-box {
  margin-top: 32px;
  padding: 18px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
}

.footer {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 0.92rem;
}