navigation.css
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) 0;
}

.logo {
  font-weight: 700;
  letter-spacing: -0.03em;
}

.nav nav {
  display: flex;
  gap: var(--space-4);
}

.nav a {
  color: var(--text-secondary);
  font-size: 14px;
}

.nav a:hover {
  color: var(--text-primary);
}