/* =====================================================================
   PIRT — Header polish (per TASK-0221)
   - Dropdown sub-menus on hover/focus
   - Compact secondary region (lang switcher · search · account)
   - Fix logo alt-text fallback
   - Constrain Drupal default `<ul class="links">` rendering inside nav
   ===================================================================== */

/* ---- Logo / branding ---- */
.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -0.3px;
  text-decoration: none;
}
.nav-logo__mark {
  width: 40px;
  height: 40px;
  flex: 0 0 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  color: var(--sp-primary, #018081);
  background: linear-gradient(145deg, rgba(42, 191, 179, 0.18), rgba(0, 84, 164, 0.08));
  border: 1px solid rgba(1, 128, 129, 0.16);
  box-shadow: 0 8px 18px rgba(0, 34, 66, 0.08);
}
.nav-logo__mark svg {
  width: 24px;
  height: 24px;
  display: block;
}
.nav-logo .site-logo,
.nav-logo img {
  height: 36px;
  width: auto;
  display: block;
}
.nav-logo__lockup {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.nav-logo .site-name {
  font-size: 18px;
  line-height: 1.05;
}
.nav-logo .site-tagline {
  color: var(--sp-muted, rgba(10, 22, 40, 0.62));
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 1.2px;
  line-height: 1.25;
  text-transform: uppercase;
}
/* When the SVG hasn't loaded, hide the broken alt text so it doesn't
   visually overflow the navbar. */
.nav-logo a img[alt]:not([src]),
.nav-logo a img:-moz-broken {
  display: none;
}

/* ---- Top-level menu items ---- */
/* Drupal wraps the menu region in `<div><nav role="navigation"><h2>…</h2>
   <div data-contextual-id>…</div> <a>…</a> .nav-item …</nav></div>`.
   Rather than using `display: contents` (which breaks contextual-link
   anchoring), we set every structural wrapper to `display: flex` so each
   level still lays its children out horizontally. */
.nav-menu,
.nav-menu > div,
.nav-menu > div > nav {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 2px;
}
/* Hide the visually-hidden block heading + Drupal's hidden contextual divs. */
.nav-menu h2 {
  position: absolute !important;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}
.nav-menu div[data-contextual-id],
.nav-menu div[data-drupal-ajax-container] {
  /* Hidden from layout but kept for the contextual-links JS to discover. */
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
  pointer-events: none;
}
/* ---- Top-level nav items: match prototype site.css spec ----
   Use `body.skin` prefix to beat skin.css/announce.css specificity. */
body.skin .nav-menu a {
  padding: 8px 14px !important;
  font-size: 14px !important;
  font-weight: 500 !important;
  color: var(--sp-text, #002242) !important;
  border-radius: 6px !important;
  transition: 0.2s !important;
  white-space: nowrap !important;
  text-decoration: none !important;
}
body.skin .nav-menu a:hover,
body.skin .nav-menu a.active,
body.skin .nav-menu a[aria-current="page"] {
  color: var(--sp-primary, #018081) !important;
  background: rgba(1, 128, 129, 0.08) !important;
}

/* ---- Has-dropdown items: nav-item + CSS-triangle caret ---- */
body.skin .nav-menu .nav-item.has-dropdown {
  position: relative;
  display: inline-flex;
  align-items: center;
}
body.skin .nav-menu .nav-item.has-dropdown > a {
  display: inline-flex !important;
  align-items: center !important;
  gap: 5px !important;
}
/* Hide the Twig-rendered <span class="caret">▾</span> — we draw a CSS triangle. */
body.skin .nav-menu .nav-item.has-dropdown > a .caret {
  display: none !important;
}
body.skin .nav-menu .nav-item.has-dropdown > a::after {
  content: '' !important;
  display: inline-block !important;
  width: 0 !important;
  height: 0 !important;
  border-style: solid !important;
  border-width: 4px 3px 0 3px !important;
  border-color: currentColor transparent transparent transparent !important;
  opacity: 0.55 !important;
  transition: transform 0.15s, opacity 0.15s !important;
  background: transparent !important;
}
body.skin .nav-menu .nav-item.has-dropdown:hover > a::after,
body.skin .nav-menu .nav-item.has-dropdown:focus-within > a::after {
  opacity: 1 !important;
  transform: rotate(180deg) !important;
}

/* ---- Hover bridge: 10px invisible band between parent item and submenu so
       cursor can travel down without the submenu collapsing. ---- */
body.skin .nav-menu .nav-item.has-dropdown::after {
  content: '' !important;
  position: absolute !important;
  top: 100% !important;
  left: 0 !important;
  right: 0 !important;
  height: 10px !important;
  background: transparent !important;
  display: block !important;
}

/* ---- Submenu panel: WHITE card per prototype ---- */
body.skin .nav-menu .nav-submenu {
  position: absolute !important;
  top: calc(100% + 10px) !important;
  left: 0 !important;
  min-width: 260px !important;
  background: #fff !important;
  border: 1px solid var(--sp-line, #E6E9EB) !important;
  border-radius: 10px !important;
  padding: 6px !important;
  margin-top: 0 !important;
  box-shadow: 0 12px 32px rgba(0, 34, 66, 0.12), 0 2px 6px rgba(0, 34, 66, 0.06) !important;
  display: none !important;
  z-index: 1001 !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
}
body.skin .nav-menu .nav-submenu a {
  display: block !important;
  padding: 9px 12px !important;
  font-size: 14px !important;
  font-weight: 600 !important;
  color: var(--sp-text, #002242) !important;
  border-radius: 6px !important;
  background: none !important;
  line-height: 1.3 !important;
  border: none !important;
  white-space: nowrap !important;
}
body.skin .nav-menu .nav-submenu a:hover,
body.skin .nav-menu .nav-submenu a:focus-visible,
body.skin .nav-menu .nav-submenu a.active {
  background: rgba(1, 128, 129, 0.08) !important;
  color: var(--sp-primary, #018081) !important;
}
body.skin .nav-menu .nav-item.has-dropdown:hover > .nav-submenu,
body.skin .nav-menu .nav-item.has-dropdown:focus-within > .nav-submenu {
  display: block !important;
  animation: nav-sub-fade 0.14s ease-out;
}
@keyframes nav-sub-fade {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* nav-actions styling moved to css/components/nav-actions.css */

/* Hide the redundant <h2 class="visually-hidden"> headings (one per menu
   block) — they bloat the DOM but never render; just ensures grep/CSS
   targets are not confused. */
.nav-menu h2.visually-hidden,
.nav-actions h2.visually-hidden {
  position: absolute !important;
  clip: rect(0 0 0 0);
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* ---- Mobile (≤ 1100px): collapse the menu, dropdowns become accordion ----
   Bumped from 900px so the 9-item nav (Home/About/Members/News/Events/
   Conference/Funding/PIELA/Contact) doesn't wrap "Contact" onto a second
   row at 1024–1280px laptop widths (E02 ISSUE-0077). */
@media (max-width: 1100px) {
  .nav-logo .site-tagline {
    display: none;
  }
  .nav-toggle {
    display: flex !important;
  }
  .nav-menu {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 16px;
    background: rgba(10, 22, 40, 0.98);
    backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--glass-border);
  }
  .nav-menu.open {
    display: flex;
  }
  .nav-menu .nav-item.has-dropdown {
    position: static;
  }
  .nav-menu .nav-submenu {
    position: static;
    display: block;
    margin: 0 0 8px 16px;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border: none;
    box-shadow: none;
    padding: 0;
  }
  .nav-actions {
    display: none;
  }
}

/* ---- Skin layer compatibility: SPREP white surfaces ---- */
body.skin .nav-menu .nav-submenu {
  background: var(--sp-surface, #fff) !important;
  border: 1px solid var(--sp-line, #E6E9EB) !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
}
body.skin .nav-menu .nav-submenu a {
  color: var(--sp-text, #002242) !important;
}
body.skin .nav-menu .nav-submenu a:hover,
body.skin .nav-menu .nav-submenu a.active {
  background: var(--sp-bg, #fafbfb) !important;
  color: var(--sp-primary, #018081) !important;
}
body.skin .nav-actions ul li a {
  color: var(--sp-text) !important;
}
body.skin .nav-actions ul li a:hover,
body.skin .nav-actions ul li a.is-active {
  background: var(--sp-bg) !important;
  color: var(--sp-primary) !important;
}