:root {
  --bg: #0b1020;
  --panel: #141b33;
  --fg: #e8ecf6;
  --muted: #9aa6c4;
  --accent: #5b8cff;
  --border: #24304f;
  --dot: #3ad29f;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 70% -10%, #1a2547 0%, var(--bg) 55%) no-repeat;
  background-attachment: fixed;
  color: var(--fg);
  line-height: 1.55;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ---- Nav (rendered by nav.js) ---- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.9rem 1.5rem;
  background: rgba(11, 16, 32, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-nav .brand {
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--fg);
  margin-right: auto;
}
.site-nav .brand span { color: var(--accent); }
.site-nav a.link {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.92rem;
  padding: 0.35rem 0;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.site-nav a.link:hover { color: var(--fg); }
.site-nav a.link.active {
  color: var(--fg);
  border-bottom-color: var(--accent);
}

/* ---- Content ---- */
main.wrap {
  flex: 1;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.5rem;
  box-shadow: 0 20px 60px rgba(0,0,0,0.45);
}
.badge {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
  margin-bottom: 1.25rem;
}
h1 { margin: 0 0 0.5rem; font-size: 1.9rem; }
h2 { margin: 1.75rem 0 0.5rem; font-size: 1.15rem; }
p { margin: 0 0 1rem; color: var(--muted); }
ul { margin: 0 0 1rem; padding-left: 1.2rem; color: var(--muted); }
li { margin-bottom: 0.35rem; }
a.inline { color: var(--accent); }
code {
  background: #0c122a;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.1rem 0.4rem;
  font-size: 0.85em;
}
.meta {
  margin-top: 1.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.4rem 1rem;
  font-size: 0.9rem;
}
.meta dt { color: var(--muted); }
.meta dd { margin: 0; }
.dot { color: var(--dot); }
footer.site-footer {
  text-align: center;
  padding: 1.5rem;
  font-size: 0.8rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
}