/**
 * @file
 * SWALIM header + primary navigation.
 *
 * Colours, radii, shadow and fonts all come from the theme tokens defined in
 * css/tokens.css and css/palette-fao.css — this file declares NO :root block,
 * so it cannot fork the palette. It loads in the `global` library's component
 * group, after palette-fao.css in the base group, so every token below is
 * already defined by the time these rules apply.
 *
 * Brand colour is --swalim-color-brand (currently FAO blue). The header will
 * follow whatever that token resolves to — flip it to var(--swalim-color-green)
 * in palette-fao.css and the header greens with the rest of the site.
 *
 * Orange (--swalim-color-accent) appears only as a rule, underline, icon and
 * focus ring, and as a button ground with DARK ink — never white text on
 * orange (see THE ORANGE RULE in palette-fao.css).
 */

.skip-link {
  position: absolute;
  top: var(--space-2xs);
  left: var(--space-2xs);
  z-index: var(--z-modal);
  background: var(--swalim-color-brand);
  color: var(--swalim-color-on-dark);
  padding: var(--space-2xs) var(--space-sm);
  border-radius: var(--radius-md);
}

/* ---------- utility bar ---------- */
.swalim-util {
  background: var(--swalim-color-blue-deep);
  color: var(--swalim-color-on-dark-muted);
  font-size: var(--fs-xs);
}
.swalim-util__inner {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: var(--space-md);
  min-height: 36px;
}
.swalim-util a { color: inherit; text-decoration: none; }
.swalim-util a:hover { color: var(--swalim-color-on-dark); text-decoration: underline; }
.swalim-util ul { display: flex; gap: var(--space-md); list-style: none; margin: 0; padding: 0; }

/* ---------- header shell ---------- */
.swalim-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: var(--swalim-color-surface);
  background: color-mix(in srgb, var(--swalim-color-surface) 94%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--swalim-color-rule);
  transition: box-shadow var(--duration-base) var(--ease-out);
}
.swalim-header.is-stuck { box-shadow: var(--shadow-md); }

.swalim-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  height: 76px;
  transition: height var(--duration-base) var(--ease-out);
}
.swalim-header.is-stuck .swalim-header__inner { height: 62px; }

/* ---------- brand ---------- */
.swalim-brand {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  text-decoration: none;
  flex-shrink: 0;
}
.swalim-brand__logo {
  height: 46px;
  width: auto;
  transition: height var(--duration-base) var(--ease-out);
}
.swalim-header.is-stuck .swalim-brand__logo { height: 38px; }
.swalim-brand__tagline {
  max-width: 16ch;
  padding-left: var(--space-xs);
  border-left: 1px solid var(--swalim-color-rule);
  font-family: var(--font-body);
  font-weight: var(--fw-regular);
  font-size: var(--fs-2xs);
  line-height: var(--lh-snug);
  color: var(--swalim-color-ink-muted);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

/* ---------- split layout: FAO left, SWALIM right, nav strip below ---------- */
.swalim-brand--fao { margin-right: auto; }
.swalim-brand--swalim { margin-left: auto; }
.swalim-brand__fao {
  height: 44px;
  width: auto;
  transition: height var(--duration-base) var(--ease-out);
}
.swalim-header.is-stuck .swalim-brand__fao { height: 36px; }

.swalim-navbar {
  background: var(--swalim-color-surface-muted);
  border-top: 1px solid var(--swalim-color-rule);
}
.swalim-navbar__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 48px;
}
.swalim-navbar .swalim-nav { grid-column: 2; margin: 0; }
.swalim-navbar .swalim-nav__list { justify-content: center; }
.swalim-navbar__search { grid-column: 3; justify-self: end; }
/* the nav strip's dropdowns hang below the strip, not the main bar */
.swalim-navbar .swalim-nav__panel { top: calc(100% + var(--space-3xs)); }

/* ---------- primary nav ---------- */
.swalim-nav { margin-left: auto; }
.swalim-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.swalim-nav__item { position: relative; }

.swalim-nav__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3xs);
  padding: var(--space-2xs) var(--space-xs);
  border: 0;
  background: none;
  border-radius: var(--radius-md);
  font: inherit;
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--swalim-color-ink);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}
.swalim-nav__link:hover { background: var(--swalim-color-surface-muted); color: var(--swalim-color-brand); }
.swalim-nav__caret { transition: transform var(--duration-fast) var(--ease-out); opacity: .6; }
.swalim-nav__item.is-open > .swalim-nav__link {
  background: var(--swalim-color-surface-muted);
  color: var(--swalim-color-brand);
}
.swalim-nav__item.is-open .swalim-nav__caret { transform: rotate(180deg); }

/* orange marks the active section — the one accent in the header bar */
.swalim-nav__item.is-active-trail > .swalim-nav__link {
  color: var(--swalim-color-brand);
  box-shadow: inset 0 -2.5px 0 var(--swalim-color-accent);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

/* ---------- dropdown / mega panel ---------- */
.swalim-nav__panel {
  position: absolute;
  top: calc(100% + var(--space-2xs));
  left: 0;
  min-width: 250px;
  padding: var(--space-2xs);
  margin: 0;
  list-style: none;
  background: var(--swalim-color-surface);
  border: 1px solid var(--swalim-color-rule);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity var(--duration-base) var(--ease-out),
              transform var(--duration-base) var(--ease-out),
              visibility var(--duration-base);
}
.swalim-nav__panel::before {
  content: "";
  position: absolute;
  top: -3px;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--swalim-color-accent);
  border-radius: 3px 3px 0 0;
}
.swalim-nav__item.is-open > .swalim-nav__panel {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.swalim-nav__panel--mega {
  display: grid;
  grid-template-columns: repeat(2, minmax(230px, 1fr));
  gap: 2px;
  width: max-content;
  max-width: min(680px, calc(100vw - var(--space-lg)));
  padding: var(--space-sm);
}
/* keep the last dropdowns inside the viewport */
.swalim-nav__item:nth-last-child(-n+2) > .swalim-nav__panel { left: auto; right: 0; }

.swalim-nav__sublink {
  display: block;
  padding: var(--space-2xs) var(--space-xs);
  border-radius: var(--radius-md);
  color: var(--swalim-color-ink);
  text-decoration: none;
  font-size: var(--fs-sm);
}
.swalim-nav__sublink:hover { background: var(--swalim-color-surface-muted); }
.swalim-nav__subitem.is-active-trail > .swalim-nav__sublink {
  background: var(--swalim-color-surface-muted);
  box-shadow: inset 2.5px 0 0 var(--swalim-color-accent);
}
.swalim-nav__label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3xs);
  font-weight: var(--fw-medium);
}
.swalim-nav__ext { opacity: .5; }
.swalim-nav__desc {
  display: block;
  margin-top: 2px;
  font-size: var(--fs-xs);
  font-weight: var(--fw-regular);
  color: var(--swalim-color-ink-muted);
  line-height: var(--lh-snug);
}

/* ---------- icon buttons + search drawer ---------- */
.swalim-header__actions { display: flex; align-items: center; gap: var(--space-2xs); }
.swalim-iconbtn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: none;
  border: 1px solid var(--swalim-color-rule);
  border-radius: var(--radius-md);
  color: var(--swalim-color-ink);
  cursor: pointer;
}
.swalim-iconbtn:hover { border-color: var(--swalim-color-brand); color: var(--swalim-color-brand); }
.swalim-iconbtn[aria-expanded="true"] {
  background: var(--swalim-color-brand);
  border-color: var(--swalim-color-brand);
  color: var(--swalim-color-on-dark);
}
.swalim-iconbtn--menu { display: none; }

.swalim-search {
  border-top: 1px solid var(--swalim-color-rule);
  background: var(--swalim-color-surface);
  padding: var(--space-sm) 0;
}
.swalim-search__form { display: flex; gap: var(--space-2xs); }
.swalim-search__form input {
  flex: 1;
  padding: var(--space-xs) var(--space-sm);
  font: inherit;
  border: 1px solid var(--swalim-color-rule);
  border-radius: var(--radius-md);
}
.swalim-search__form input:focus { border-color: var(--swalim-color-brand); outline: none; }
.swalim-btn {
  padding: var(--space-xs) var(--space-md);
  border: 0;
  border-radius: var(--radius-md);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-sm);
  cursor: pointer;
}
/* orange ground with DARK ink — never white text on orange */
.swalim-btn--accent { background: var(--swalim-color-accent); color: var(--swalim-color-accent-ink); }
.swalim-btn--accent:hover { background: var(--swalim-color-accent-on-dark); }

/* ---------- mobile drawer ---------- */
.swalim-mobile {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  background: rgb(28 71 103 / 45%);
  background: color-mix(in srgb, var(--swalim-color-blue-deep) 45%, transparent);
}
.swalim-mobile__panel {
  width: min(380px, 88vw);
  height: 100%;
  margin-left: auto;
  padding: var(--space-md) var(--space-sm) var(--space-2xl);
  background: var(--swalim-color-surface);
  overflow-y: auto;
  animation: swalim-slide-in var(--duration-base) var(--ease-out);
}
@keyframes swalim-slide-in { from { transform: translateX(100%); } to { transform: translateX(0); } }

.swalim-mobile .swalim-nav__list { flex-direction: column; align-items: stretch; gap: 0; }
.swalim-mobile .swalim-nav__item { border-bottom: 1px solid var(--swalim-color-rule); }
.swalim-mobile .swalim-nav__link {
  width: 100%;
  justify-content: space-between;
  padding: var(--space-xs) var(--space-3xs);
  font-size: var(--fs-md);
  border-radius: 0;
}
.swalim-mobile .swalim-nav__panel {
  position: static;
  display: none;
  width: auto;
  max-width: none;
  grid-template-columns: 1fr;
  border: 0;
  box-shadow: none;
  opacity: 1;
  visibility: visible;
  transform: none;
  padding: 0 0 var(--space-xs) var(--space-2xs);
}
.swalim-mobile .swalim-nav__panel::before { display: none; }
.swalim-mobile .swalim-nav__item.is-open > .swalim-nav__panel { display: block; }
.swalim-mobile__util {
  margin-top: var(--space-md);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--swalim-color-rule);
  font-size: var(--fs-sm);
}
.swalim-mobile__util a { color: var(--swalim-color-brand); }

/* logo on a dark ground (footer): the supplied SVG carries an opaque white
   plate that is part of the letter cut-outs, so give it a white panel until
   FAO supplies a reversed mark. */
.swalim-brand--on-dark .swalim-brand__logo {
  background: var(--swalim-color-surface);
  padding: var(--space-2xs) var(--space-xs);
  border-radius: var(--radius-md);
  height: 56px;
  box-sizing: content-box;
}

/* ---------- breakpoints ---------- */
@media (max-width: 1080px) {
  .swalim-brand__tagline { display: none; }
}
@media (max-width: 992px) {
  .swalim-navbar { display: none; }       /* nav moves into the drawer */
  .swalim-iconbtn--menu { display: inline-flex; }
  .swalim-header__inner { height: 66px; }
  .swalim-header.is-stuck .swalim-header__inner { height: 58px; }
  /* FAO left, hamburger right; SWALIM sits between them */
  .swalim-brand--swalim { margin-left: 0; margin-right: var(--space-sm); }
}
@media (max-width: 560px) {
  .swalim-util__inner { justify-content: center; gap: var(--space-sm); }
  .swalim-brand__logo { height: 34px; }
  .swalim-brand__fao { height: 36px; }
  .swalim-brand--swalim { display: none; }  /* keep FAO + hamburger only */
}
/* mobile drawer search field */
.swalim-mobile__search { display: flex; gap: var(--space-2xs); margin-bottom: var(--space-sm); }
.swalim-mobile__search input {
  flex: 1; padding: var(--space-2xs) var(--space-xs); font: inherit;
  border: 1px solid var(--swalim-color-rule); border-radius: var(--radius-md);
}

:focus-visible { outline: 2px solid var(--swalim-color-accent); outline-offset: 2px; border-radius: 3px; }

@media (prefers-reduced-motion: reduce) {
  .swalim-header__inner,
  .swalim-brand__logo,
  .swalim-nav__panel,
  .swalim-nav__caret,
  .swalim-mobile__panel { transition: none !important; animation: none !important; }
}