:root {
  --bg: #0e1116;
  --panel: #161b22;
  --ink: #e6edf3;
  --muted: #9aa7b4;
  --brand: #4f7cff;
  --brand-2: #34d399;
  --line: #232a33;
  --radius: 14px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
}

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

header.site {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 22px;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(14, 17, 22, 0.85);
  backdrop-filter: blur(8px);
}

header.site .logo {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  display: grid;
  place-items: center;
  font-weight: 700;
  color: #0e1116;
}

header.site .brand { font-weight: 700; letter-spacing: 0.2px; }
header.site nav { margin-left: auto; display: flex; gap: 18px; }
header.site nav a { color: var(--muted); text-decoration: none; font-size: 0.95rem; }
header.site nav a:hover { color: var(--ink); }

.wrap { max-width: 820px; margin: 0 auto; padding: 40px 22px 80px; }

.hero {
  text-align: center;
  padding: 72px 22px 40px;
}
.hero h1 { font-size: 2.4rem; margin: 0 0 10px; }
.hero p { color: var(--muted); font-size: 1.15rem; max-width: 560px; margin: 0 auto; }
.badge {
  display: inline-block;
  margin-top: 26px;
  padding: 12px 22px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #0e1116;
  font-weight: 700;
  text-decoration: none;
}

h1.doc { font-size: 1.9rem; margin-bottom: 4px; }
.updated { color: var(--muted); font-size: 0.9rem; margin-bottom: 30px; }

h2 { font-size: 1.25rem; margin-top: 34px; border-bottom: 1px solid var(--line); padding-bottom: 8px; }

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 24px;
  margin-top: 18px;
}

ul { padding-left: 20px; }
li { margin: 6px 0; }

footer.site {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
  text-align: center;
  padding: 28px 22px;
}
footer.site a { color: var(--muted); }