/* ============================================================
   NAVIGATION
   ============================================================ */

.nav {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  width: 100%;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  padding-inline: var(--space-6);
  gap: var(--space-2);
  background-color: var(--color-bg-body);
  border-bottom: 1px solid var(--color-border-subtle);
}

/* ── Brand ────────────────────────────────────────────────── */

.nav__brand {
  font-size: var(--text-md);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  letter-spacing: var(--tracking-tight);
  text-decoration: none;
  flex-shrink: 0;
  margin-right: var(--space-4);
  transition: color var(--duration-normal) var(--ease-default);
}

.nav__brand:hover {
  color: var(--color-accent);
  text-decoration: none;
}

/* Logo comparison wrapper — holds both options side by side.
   Remove this block (and .nav__brand-sep) once a logo is chosen. */
.nav__brand-compare {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
  margin-right: var(--space-4);
}

/* Each logo option: icon + wordmark inline */
.nav__brand--logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-right: 0; /* parent .nav__brand-compare handles spacing */
}

/* Divider between the two options */
.nav__brand-sep {
  color: var(--color-border-strong);
  font-size: var(--text-xs);
  user-select: none;
}

/* ── Link list ────────────────────────────────────────────── */

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}

.nav__item {
  position: relative;
}

.nav__link {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition:
    color            var(--duration-normal) var(--ease-default),
    background-color var(--duration-normal) var(--ease-default);
}

.nav__link:hover {
  color: var(--color-text-primary);
  background-color: var(--color-bg-interactive);
  text-decoration: none;
}

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

/* ── Dropdown ─────────────────────────────────────────────── */

.nav__dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  list-style: none;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-3) var(--space-2) var(--space-2);
  min-width: 180px;
  z-index: var(--z-dropdown);
}

.nav__item:hover .nav__dropdown {
  display: block;
}

.nav__dropdown-link {
  display: block;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  white-space: nowrap;
  transition:
    color            var(--duration-fast) var(--ease-default),
    background-color var(--duration-fast) var(--ease-default);
}

.nav__dropdown-link:hover {
  color: var(--color-text-primary);
  background-color: var(--color-bg-interactive);
  text-decoration: none;
}

/* ── Actions slot (right side) ────────────────────────────── */

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: auto;
}

/* ── Mobile toggle ────────────────────────────────────────── */

.nav__toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text-secondary);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  font-size: var(--text-lg);
  line-height: 1;
  transition:
    color            var(--duration-fast) var(--ease-default),
    background-color var(--duration-fast) var(--ease-default);
}

.nav__toggle:hover {
  color: var(--color-text-primary);
  background-color: var(--color-bg-interactive);
}

/* ── Mobile breakpoint ────────────────────────────────────── */

@media (max-width: 640px) {
  .nav {
    flex-wrap: wrap;
    height: auto;
    padding: var(--space-3) var(--space-4);
  }

  /* Push the hamburger to the far right */
  .nav__brand,
  .nav__brand-compare {
    margin-right: auto;
  }

  /* Show the hamburger button */
  .nav__toggle {
    display: flex;
  }

  /* Links and actions are hidden until the menu opens */
  .nav__links {
    display: none;
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    padding-bottom: var(--space-3);
    gap: var(--space-1);
  }

  .nav__actions {
    display: none;
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    margin-left: 0;
    padding-bottom: var(--space-3);
    gap: var(--space-1);
  }

  /* Username is display-only — not a link, so hide it on mobile */
  .nav__username {
    display: none;
  }

  /* Reveal both when the nav has .is-open (toggled by nav_bar_mgr.js) */
  .nav.is-open .nav__links {
    display: flex;
  }

  .nav.is-open .nav__actions {
    display: flex;
  }

  /* Mobile: show dropdowns inline rather than as positioned overlays */
  .nav__dropdown {
    position: static;
    display: block;
    transform: none;
    box-shadow: none;
    border: none;
    background: none;
    padding: 0 0 0 var(--space-4);
    min-width: unset;
  }

  .nav__item:hover .nav__dropdown {
    display: block;
  }
}