/* ---- Top bar ---- */
.topbar {
  background: var(--color-dark);
  color: var(--color-white);
  font-size: var(--fs-xs);
}

.topbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-2);
}

.topbar__message {
  opacity: 0.85;
}

.topbar__links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.topbar__social {
  display: flex;
  gap: var(--space-3);
  flex-shrink: 0;
}

.topbar__social a {
  display: inline-flex;
  opacity: 0.8;
  transition: opacity var(--transition-fast);
}

.topbar__social a:hover {
  opacity: 1;
}

/* ---- Main header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding-block: var(--space-4);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--fs-md);
  font-weight: var(--fw-bold);
  color: var(--color-ink);
}

.logo__mark {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: var(--fs-sm);
  flex-shrink: 0;
}

.nav {
  flex: 1;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav__link {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-ink-soft);
  padding-block: var(--space-2);
  border-bottom: 2px solid transparent;
}

.nav__link:hover,
.nav__item.current-menu-item .nav__link {
  color: var(--color-secondary);
}

.nav__item.current-menu-item .nav__link {
  border-bottom-color: var(--color-secondary);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.icon-btn {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-ink-soft);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.icon-btn:hover {
  background: var(--color-surface);
  color: var(--color-secondary);
}

.nav-toggle {
  display: none;
}

@media (max-width: 1024px) {
  .nav { display: none; }
  .nav-toggle { display: inline-flex; }

  .nav.is-open {
    display: block;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    padding: var(--space-4) var(--container-pad);
  }

  .nav.is-open .nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }
}

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

/* ---- Dropdown submenus (native WP nav menu children) ---- */
.nav__item {
  position: relative;
}

.nav__item .sub-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2) 0;
  z-index: var(--z-dropdown);
}

.nav__item:hover .sub-menu,
.nav__item:focus-within .sub-menu {
  display: block;
}

.nav__item .sub-menu .nav__item {
  width: 100%;
}

.nav__item .sub-menu .nav__link {
  display: block;
  padding: var(--space-2) var(--space-4);
  border-bottom: none;
}

.nav__item .sub-menu .nav__link:hover {
  background: var(--color-surface);
}

.nav__item.menu-item-has-children > .nav__link::after {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  margin-left: 6px;
  margin-bottom: 2px;
}

@media (max-width: 1024px) {
  .nav__item .sub-menu {
    position: static;
    box-shadow: none;
    border: none;
    padding-left: var(--space-4);
    display: none;
  }

  .nav__item.menu-item-has-children.is-expanded .sub-menu {
    display: block;
  }
}

.header-avatar {
  border-radius: var(--radius-full);
  width: 28px;
  height: 28px;
}

/* ---- Logo with tagline (new wireframe) ---- */
.logo__text { display: flex; flex-direction: column; line-height: 1.15; }
.logo__name { font-size: var(--fs-md); }
.logo__tagline { font-size: 10px; font-weight: var(--fw-medium); color: var(--color-secondary); text-transform: uppercase; letter-spacing: 0.04em; }

/* ---- Login / Sign Up header buttons ---- */
.header-auth {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header-avatar-link { display: flex; }

/* ---- Mega-menu (ERP Systems dropdown) ---- */
.nav__item.has-mega-menu { position: static; }

.mega-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  padding: var(--space-6) 0;
  z-index: var(--z-dropdown);
}

.nav__item.has-mega-menu:hover .mega-menu,
.nav__item.has-mega-menu:focus-within .mega-menu {
  display: grid;
  grid-template-columns: repeat(3, 1fr) 260px;
  gap: var(--space-8);
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.mega-menu__heading {
  font-size: var(--fs-sm);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.mega-menu__list li { margin-bottom: var(--space-2); }
.mega-menu__list a { font-size: var(--fs-sm); color: var(--color-ink-soft); }
.mega-menu__list a:hover { color: var(--color-secondary); }

.mega-menu__viewall {
  display: inline-block;
  margin-top: var(--space-3);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-secondary);
}

.mega-menu__promo {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}

.mega-menu__promo img { border-radius: var(--radius-md); margin-bottom: var(--space-3); width: 100%; }
.mega-menu__promo h4 { font-size: var(--fs-md); margin-bottom: var(--space-2); }
.mega-menu__promo p { font-size: var(--fs-sm); margin-bottom: var(--space-3); }

@media (max-width: 1024px) {
  .nav__item.has-mega-menu:hover .mega-menu,
  .nav__item.has-mega-menu:focus-within .mega-menu,
  .nav.is-open .mega-menu {
    display: none !important;
  }
}

/* ---- Real tab switching (ERP System overview) ---- */
.taxonomy-tab {
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
}

.taxonomy-tab.is-active {
  color: var(--color-secondary);
  border-bottom-color: var(--color-secondary);
  font-weight: var(--fw-semibold);
}