nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 56px;
  height: 64px;
  background: var(--bg-nav);
  backdrop-filter: blur(24px) saturate(180%);
  border-bottom: 1px solid var(--border);
  transition: transform 0.35s cubic-bezier(.16, 1, .3, 1), background 0.35s, border-color 0.35s;
}

nav.nav-hidden {
  transform: translateY(-100%);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--fg);
}

.nav-brand img { width: 26px; height: 26px; }

.nav-brand-name {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.nav-center {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
}

.nav-center a {
  color: var(--fg-2);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: -0.01em;
  transition: color 0.2s;
}

.nav-center a:hover { color: var(--fg); }

.nav-right { display: flex; align-items: center; gap: 8px; }

.toggle-btn {
  background: none;
  border: 1px solid var(--btn-ghost-b);
  border-radius: 8px;
  width: 32px;
  height: 32px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  transition: background 0.2s, border-color 0.2s;
}

.toggle-btn:hover { background: var(--btn-ghost-hov); border-color: var(--border-hover); }

.cta-nav {
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: none;
  border-radius: 8px;
  padding: 0 16px;
  height: 32px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  letter-spacing: 0.01em;
  transition: background 0.2s;
}

.cta-nav:hover { background: var(--btn-hov); }

@media (max-width: 860px) {
  nav { padding: 0 20px; }
  .nav-center { display: none; }
}