/* ============================================
   COMPONENT — Navigation
   ============================================ */

.nav {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--duration-base) var(--ease-out);
}

.nav--scrolled {
  box-shadow: var(--shadow-md);
}

.nav__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

/* ── Logo ── */
.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.nav__logo-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
}

.nav__logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
  font-family: var(--font-display);
  font-weight: var(--weight-black);
}

.nav__logo-text .glow {
  font-size: 1.4rem;
  color: var(--color-yellow-dark);
}

.nav__logo-text .worm {
  font-size: 1rem;
  color: var(--color-ink);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ── Links ── */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  color: var(--color-ink-mid);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  position: relative;
  padding-block: var(--space-2);
  transition: color var(--duration-fast) var(--ease-out);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-yellow);
  border-radius: var(--radius-full);
  transition: width var(--duration-base) var(--ease-out);
}

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

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

/* ── Mobile Menu Toggle ── */
.nav__toggle {
  display: none;
  width: 36px;
  height: 36px;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  transition: background var(--duration-fast);
}

.nav__toggle:hover {
  background: var(--color-surface);
}

.nav__toggle-bar {
  display: block;
  height: 2px;
  background: var(--color-ink);
  border-radius: var(--radius-full);
  transition: transform var(--duration-base) var(--ease-out),
              opacity var(--duration-base) var(--ease-out),
              width var(--duration-base) var(--ease-out);
}

.nav__toggle-bar:nth-child(1) { width: 24px; }
.nav__toggle-bar:nth-child(2) { width: 18px; }
.nav__toggle-bar:nth-child(3) { width: 24px; }

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
  width: 24px;
}
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(2) {
  opacity: 0;
}
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
  width: 24px;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  .nav__links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: var(--space-4) var(--container-pad);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
  }

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

  .nav__link {
    padding-block: var(--space-4);
    width: 100%;
  }
}