/**
 * navigation.css — Sticky header, dropdown menu, hamburger, language switcher
 */

/* ── HEADER BASE ─────────────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: var(--z-sticky);
  background: var(--nav-bg-clear);
  transition: var(--nav-transition);
}

.site-header.is-scrolled {
  background: var(--nav-bg-solid);
  box-shadow: var(--shadow-nav);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--space-6);
}

/* ── LOGO ───────────────────────────────────────────────────── */
.site-logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  text-decoration: none;
}

.site-logo__img {
  height: 48px;
  width: auto;
  display: block;
}

.site-logo__text {
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-accent);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

/* ── NAV MENU ───────────────────────────────────────────────── */
.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 0;
  flex: 1;
  justify-content: center;
}

.nav-menu > li {
  position: relative;
}

.nav-menu > li > a {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  color: rgba(255, 255, 255, 0.82);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
  position: relative;
  white-space: nowrap;
}

/* Animated underline */
.nav-menu > li > a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: var(--space-4);
  right: var(--space-4);
  height: 1px;
  background: var(--color-ice);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.nav-menu > li > a:hover,
.nav-menu > li.current-menu-item > a,
.nav-menu > li.current-menu-ancestor > a {
  color: var(--color-accent);
}

.nav-menu > li > a:hover::after,
.nav-menu > li.current-menu-item > a::after,
.nav-menu > li.current-menu-ancestor > a::after {
  transform: scaleX(1);
}

/* ── DROPDOWN CHEVRON ───────────────────────────────────────── */
.nav-menu > li.menu-item-has-children > a .nav-chevron {
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.nav-menu > li.menu-item-has-children:hover > a .nav-chevron {
  transform: rotate(180deg);
}

/* ── DROPDOWN MENU ──────────────────────────────────────────── */
.sub-menu {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 0;
  min-width: 260px;
  background: var(--color-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  list-style: none;
  padding: var(--space-2) 0;
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
  transition: opacity var(--transition-base), transform var(--transition-base);
  z-index: var(--z-dropdown);
}

.nav-menu > li.menu-item-has-children:hover > .sub-menu,
.nav-menu > li.menu-item-has-children:focus-within > .sub-menu {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}

.sub-menu li a {
  display: block;
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast),
              padding-left var(--transition-fast),
              border-color var(--transition-fast);
  border-left: 2px solid transparent;
}

.sub-menu li a:hover,
.sub-menu li.current-menu-item > a {
  color: var(--color-accent);
  padding-left: calc(var(--space-6) + var(--space-3));
  border-left-color: var(--color-ice);
}

/* ── HEADER ACTIONS ────────────────────────────────────────── */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

/* ── LANGUAGE SWITCHER ─────────────────────────────────────── */
.language-switcher {
  display: flex;
  align-items: center;
  gap: 2px;
}

/* Polylang outputs <ul> with <li> elements */
.language-switcher ul {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
}

.language-switcher a,
.language-switcher .lang-item-current span {
  display: inline-block;
  padding: 3px var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.language-switcher a:hover {
  color: var(--color-accent);
  background: var(--color-bg-card);
}

.language-switcher .current-lang a,
.language-switcher .lang-item-current a {
  color: var(--color-ice);
}

/* ── NAV CTA BUTTON ────────────────────────────────────────── */
.nav-cta {
  font-size: var(--text-xs);
  padding: var(--space-2) var(--space-5);
}

/* ── HAMBURGER ─────────────────────────────────────────────── */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: var(--space-2);
  transition: border-color var(--transition-fast);
  flex-shrink: 0;
}

.hamburger:hover {
  border-color: var(--color-ice);
}

.hamburger__line {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--color-accent);
  transition: transform var(--transition-base), opacity var(--transition-base);
  transform-origin: center;
}

.hamburger.is-active .hamburger__line:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.hamburger.is-active .hamburger__line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.hamburger.is-active .hamburger__line:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ── MOBILE NAV OVERLAY ────────────────────────────────────── */
.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(8, 15, 36, 0.85);
  z-index: calc(var(--z-sticky) - 1);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.nav-overlay.is-visible {
  opacity: 1;
  pointer-events: all;
}

/* ── FOOTER NAV ────────────────────────────────────────────── */
.footer-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-nav-list a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
  display: inline-block;
}

.footer-nav-list a:hover {
  color: var(--color-accent);
  padding-left: var(--space-2);
}