*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #ffffff;
  --text: #1a1a1a;
  --muted: #6b6b6b;
  --accent: #1a6b3c;
  --accent-light: #e8f5ee;
  --border: #e8e8e8;
  --card: #f9f9f9;

  --app-bg: #0F1C3F;
  --app-card: #1B2E6B;
  --app-gold: #C9A84C;
  --app-text: #D9D9D9;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

/* ── Nav ── */
.site-nav {
  padding: 1.25rem 2rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-nav.dark {
  border-bottom-color: rgba(255,255,255,0.1);
  background: var(--app-bg);
}

.logo {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo .labs { color: var(--accent); }

.site-nav.dark .logo { color: #fff; }
.site-nav.dark .logo .labs { color: var(--app-gold); }

.nav-link {
  font-size: 0.9rem;
  color: var(--muted);
  text-decoration: none;
}

.nav-link:hover { color: var(--text); }
.site-nav.dark .nav-link { color: rgba(255,255,255,0.6); }
.site-nav.dark .nav-link:hover { color: #fff; }

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.site-footer.dark {
  border-top-color: rgba(255,255,255,0.1);
  background: var(--app-bg);
}

.site-footer p {
  font-size: 0.85rem;
  color: var(--muted);
}

.site-footer.dark p { color: rgba(255,255,255,0.4); }

.footer-links { display: flex; gap: 1.25rem; }

.footer-links a {
  font-size: 0.85rem;
  color: var(--muted);
  text-decoration: none;
}

.footer-links a:hover { color: var(--text); }
.site-footer.dark .footer-links a { color: rgba(255,255,255,0.4); }
.site-footer.dark .footer-links a:hover { color: #fff; }

/* ── Utilities ── */
.section-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1rem;
}

@media (max-width: 520px) {
  .site-nav, .site-footer { padding: 1rem 1.25rem; }
  .site-footer { flex-direction: column; text-align: center; }
  .footer-links { justify-content: center; }
}