.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-3) 0;
  transition: background var(--duration-base), backdrop-filter var(--duration-base);
}

.nav--scrolled {
  background: rgba(13, 13, 13, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-line-1);
}

.nav__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.4rem;
  color: var(--color-accent);
  letter-spacing: -0.02em;
  font-weight: 300;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.nav__link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-2);
  position: relative;
  transition: color var(--duration-fast);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--duration-base) var(--ease-out-expo);
}

.nav__link:hover {
  color: var(--color-text-0);
}

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

.nav__link.is-active {
  color: var(--color-accent);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.nav__toggle-bar {
  width: 22px;
  height: 1px;
  background: var(--color-text-1);
  transition: all var(--duration-fast);
}

@media (max-width: 768px) {
  .nav__links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg-1);
    border-bottom: 1px solid var(--color-line-1);
    flex-direction: column;
    padding: var(--space-3) var(--space-4);
    gap: var(--space-3);
  }

  .nav__links.is-open {
    display: flex;
  }

  .nav__toggle {
    display: flex;
  }
}