/* ===== Navigation ===== */
.site-nav {
  position: fixed;
  top: 0;
  inset-inline: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background-color: rgba(15, 23, 42, 0.7);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 72rem;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.nav-links {
  display: none;
  align-items: center;
  gap: 2rem;
  font-size: 0.875rem;
  color: var(--muted-foreground);
}
.nav-links a {
  font-family: 'JetBrains Mono', monospace;
  text-decoration: none;
  color: inherit;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--foreground); }
.nav-links a .num { color: var(--primary); margin-right: 0.25rem; }
.nav-cta {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  border: 1px solid rgba(59,130,246,0.4);
  color: var(--primary);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  text-decoration: none;
  transition: background 0.2s;
}
.nav-cta:hover { background: rgba(59,130,246,0.1); }

/* Mobile menu button */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border);
  background: rgba(17,24,39,0.5);
  color: var(--foreground);
  cursor: pointer;
}
.nav-toggle svg { width: 20px; height: 20px; }

/* Mobile dropdown */
.mobile-menu {
  display: none;
  border-top: 1px solid var(--border);
  background: rgba(15,23,42,0.95);
  backdrop-filter: blur(12px);
}
.mobile-menu.open { display: block; }
.mobile-menu .inner {
  max-width: 72rem;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.mobile-menu a {
  padding: 0.75rem 0.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.95rem;
  color: var(--muted-foreground);
  text-decoration: none;
  border-radius: 0.5rem;
  transition: background 0.15s, color 0.15s;
}
.mobile-menu a:hover { background: rgba(59,130,246,0.08); color: var(--foreground); }
.mobile-menu a .num { color: var(--primary); margin-right: 0.5rem; }

@media (min-width: 768px) {
  .nav-links { display: flex; }
  .nav-cta { display: inline-flex; }
  .nav-toggle { display: none; }
  .mobile-menu { display: none !important; }
}