/* ==========================================================================
   Header — Sticky header, navigation, mobile hamburger
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: var(--white);
  border-bottom: 1px solid var(--line-200);
  transition: box-shadow var(--transition-normal);
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-card);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-16);
  height: 64px;
}

/* Logo */
.header-logo {
  flex-shrink: 0;
}

.header-logo img {
  height: 36px;
  width: auto;
}

/* Main nav */
.main-nav {
  display: none;
}

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

.nav-list > li > a {
  display: block;
  padding: var(--space-8) var(--space-12);
  font-size: var(--text-small);
  font-weight: 500;
  color: var(--ink-700);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  white-space: nowrap;
}

.nav-list > li > a:hover {
  color: var(--cci-blue-700);
  background-color: var(--cci-blue-100);
}

/* Submenu */
.nav-has-children {
  position: relative;
}

.nav-submenu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background: var(--white);
  border: 1px solid var(--line-200);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: var(--space-8) 0;
  z-index: var(--z-dropdown);
}

.nav-has-children:hover .nav-submenu,
.nav-has-children:focus-within .nav-submenu {
  display: block;
}

.nav-submenu a {
  display: block;
  padding: var(--space-8) var(--space-16);
  font-size: var(--text-small);
  color: var(--ink-700);
}

.nav-submenu a:hover {
  background-color: var(--cci-blue-100);
  color: var(--cci-blue-700);
}

.nav-submenu a:focus-visible {
  outline: 2px solid var(--cci-blue-500);
  outline-offset: -2px;
}

/* Header actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-12);
}

.header-utility-link {
  display: none;
  font-size: var(--text-small);
  color: var(--ink-500);
  white-space: nowrap;
}

.header-utility-link:hover {
  color: var(--cci-blue-700);
}

.header-cta {
  display: none;
  font-size: var(--text-small);
  padding: var(--space-8) var(--space-16);
}

/* Language switcher */
.lang-switcher {
  position: relative;
}

.lang-switcher-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-8);
  font-size: var(--text-small);
  font-weight: 600;
  color: var(--ink-700);
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
  justify-content: center;
  background: none;
  border: none;
  font-family: var(--font-body);
}

.lang-switcher-toggle:focus-visible {
  outline: 2px solid var(--cci-blue-500);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.lang-switcher-menu {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  min-width: 60px;
  background: var(--white);
  border: 1px solid var(--line-200);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
  z-index: var(--z-dropdown);
  padding: var(--space-4) 0;
}

.lang-switcher.is-open .lang-switcher-menu {
  display: block;
}

.lang-switcher-menu a {
  display: block;
  padding: var(--space-8) var(--space-16);
  font-size: var(--text-small);
  font-weight: 500;
  text-align: center;
  color: var(--ink-700);
}

.lang-switcher-menu a:hover {
  background-color: var(--cci-blue-100);
  color: var(--cci-blue-700);
}

/* Mobile nav toggle (hamburger) */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  cursor: pointer;
  background: none;
  border: none;
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--cci-blue-500);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.nav-toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ink-700);
  border-radius: 2px;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.nav-toggle.is-active .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.is-active .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-active .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav open state */
.main-nav.is-open {
  display: block;
  position: absolute;
  top: 64px;
  left: 0;
  right: 0;
  background: var(--white);
  border-bottom: 1px solid var(--line-200);
  box-shadow: var(--shadow-card);
  padding: var(--space-16) 0;
  max-height: calc(100vh - 64px);
  overflow-y: auto;
}

.main-nav.is-open .nav-list {
  flex-direction: column;
  align-items: stretch;
}

.main-nav.is-open .nav-list > li > a {
  padding: var(--space-12) var(--space-24);
}

.main-nav.is-open .nav-submenu {
  display: block;
  position: static;
  box-shadow: none;
  border: none;
  padding-left: var(--space-24);
  background: var(--cci-blue-100);
}