.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-md);
  background-color: var(--color-black);
  border-bottom: 1px solid #222;
}

.nav__logo {
  font-family: var(--font-display);
  font-size: 26px;
  letter-spacing: 0.08em;
  color: var(--color-white);
  line-height: 1;
}

.nav__logo span {
  color: var(--color-accent);
}

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

.nav__link {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-mid);
  transition: color var(--transition-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-accent);
  transition: width var(--transition-base);
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--color-white);
}

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

/* Mobile menu toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-xs);
}

.nav__toggle-bar {
  width: 24px;
  height: 2px;
  background-color: var(--color-white);
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

/* Mobile overlay */
.nav__overlay {
  display: none;
  position: fixed;
  inset: 0;
  background-color: var(--color-black);
  z-index: 99;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
}

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

.nav__overlay-link {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-white);
  letter-spacing: 0.05em;
  transition: color var(--transition-fast);
}

.nav__overlay-link:hover {
  color: var(--color-accent);
}

@media (max-width: 768px) {
  .nav__links {
    display: none;
  }

  .nav__toggle {
    display: flex;
  }

  .nav__toggle.is-open .nav__toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav__toggle.is-open .nav__toggle-bar:nth-child(2) {
    opacity: 0;
  }

  .nav__toggle.is-open .nav__toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
}