.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-xl);
  background: rgba(15, 12, 10, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--duration-normal), border-color var(--duration-normal);
}

.nav--transparent {
  background: transparent;
  border-color: transparent;
}

.nav__brand {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.nav__brand:hover {
  color: var(--color-accent-light);
}

.nav__links {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
}

.nav__link {
  font-family: var(--font-body);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-secondary);
  position: relative;
  transition: color 0.2s;
  padding: var(--space-xs) 0;
}

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

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--duration-normal) var(--ease-out-expo);
}

.nav__link--active {
  color: var(--color-text-primary);
}

.nav__link--active::after {
  width: 100%;
}

.nav__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  border-radius: 9px;
  background: var(--color-accent);
  color: var(--color-bg-primary);
  font-size: 0.7rem;
  font-weight: 500;
  padding: 0 4px;
  margin-left: 4px;
  vertical-align: middle;
}

.nav__badge[hidden] {
  display: none;
}

#app {
  padding-top: 60px;
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section {
  padding: var(--space-3xl) 0;
}

/* Responsive */
@media (max-width: 768px) {
  .nav {
    padding: var(--space-sm) var(--space-md);
  }

  .nav__links {
    gap: var(--space-md);
  }

  .nav__link {
    font-size: 0.75rem;
  }

  h1 { font-size: 2.5rem; }
  h2 { font-size: 1.75rem; }

  .container {
    padding: 0 var(--space-md);
  }

  .section {
    padding: var(--space-2xl) 0;
  }
}

@media (max-width: 480px) {
  .nav__links {
    gap: var(--space-sm);
  }

  .nav__link {
    font-size: 0.7rem;
    letter-spacing: 0.04em;
  }

  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
}