/* ── Two-row sticky site header ───────────────────────────────────────────
 * Row 1 (.site-header__inner):  logo + brand text | actions (login/search/lang)
 * Row 2 (.site-header__nav-bar): full-width navigation on dark blue bg
 * Mobile (<1024px): only row 1 visible, hamburger activates mobile-nav drawer
 * ────────────────────────────────────────────────────────────────────────── */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  display: flex;
  flex-direction: column;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  z-index: var(--z-header);
  transition: box-shadow var(--transition-fast), background var(--transition-fast);
}

.site-header.is-scrolled {
  box-shadow: var(--c-shadow);
  background: rgba(255, 255, 255, 1);
}

/* ── Row 1: Brand + Actions ────────────────────────────────────────────── */
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-16);
  height: 60px;
  max-width: var(--container-max);
  width: 100%;
  margin-inline: auto;
  padding-inline: var(--sp-24);
  border-bottom: 1px solid var(--c-border);
}

/* ── Row 2: Nav bar (dark blue) ─────────────────────────────────────────── */
.site-header__nav-bar {
  background: var(--c-primary);
  height: 44px;
  display: flex;
  align-items: stretch;
}

/* ── Brand ─────────────────────────────────────────────────────────────── */
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-12);
  flex-shrink: 0;
  color: var(--c-primary-700);
  text-decoration: none;
}

.brand__logo {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  object-fit: cover;
  border-radius: 50%;
  display: block;
}

@media (max-width: 480px) {
  .brand__logo {
    width: 34px;
    height: 34px;
  }
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand__text strong {
  font-weight: 700;
  font-size: var(--fs-14);
  color: var(--c-primary-900);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.brand__text span {
  font-weight: 500;
  font-size: 0.6875rem;
  color: var(--c-text-muted);
  letter-spacing: 0.01em;
}

@media (max-width: 600px) {
  .brand__text {
    display: none;
  }
}

/* ── Primary nav (inside nav-bar) ───────────────────────────────────────── */
.primary-nav {
  display: flex;
  align-items: stretch;
  max-width: var(--container-max);
  width: 100%;
  margin-inline: auto;
  padding-inline: var(--sp-16);
}

.primary-nav__list {
  display: flex;
  align-items: stretch;
  gap: 0;
}

.primary-nav__link {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-6);
  padding: 0 var(--sp-14);
  color: rgba(255, 255, 255, 0.82);
  font-weight: 600;
  font-size: var(--fs-13);
  white-space: nowrap;
  position: relative;
  transition: background var(--transition-fast), color var(--transition-fast);
  border-radius: 0;
  height: 44px;
}

.primary-nav__link.is-active {
  color: var(--c-accent);
  background: rgba(255, 255, 255, 0.08);
}

.primary-nav__link.is-active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: var(--sp-14);
  right: var(--sp-14);
  height: 2px;
  border-radius: 2px 2px 0 0;
  background: var(--c-accent);
}

.primary-nav__link:hover {
  background: rgba(255, 255, 255, 0.10);
  color: #fff;
}

/* ── Chevron ────────────────────────────────────────────────────────────── */
.primary-nav__chevron {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
  opacity: 0.7;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.has-dropdown:hover .primary-nav__chevron,
.has-dropdown:focus-within .primary-nav__chevron {
  transform: rotate(180deg);
  opacity: 1;
}

/* ── Desktop dropdown ───────────────────────────────────────────────────── */
.has-dropdown {
  position: relative;
}

.dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  min-width: 280px;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  box-shadow: var(--c-shadow-lg);
  padding: var(--sp-8) 0;
  list-style: none;
  margin: 0;
  z-index: calc(var(--z-header) + 1);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition-fast), visibility var(--transition-fast),
    transform var(--transition-fast);
  transform: translateY(-6px);
}

.has-dropdown:hover .dropdown,
.has-dropdown:focus-within .dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.dropdown__item {
  display: block;
}

.dropdown__link {
  display: block;
  padding: var(--sp-8) var(--sp-20);
  font-size: var(--fs-14);
  font-weight: 500;
  color: var(--c-text);
  white-space: nowrap;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.dropdown__link:hover,
.dropdown__link:focus-visible {
  background: var(--c-bg-soft);
  color: var(--c-primary);
}

.dropdown__link.is-active {
  color: var(--c-primary);
  font-weight: 700;
  background: var(--c-accent-muted);
}

/* ── Header actions ─────────────────────────────────────────────────────── */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-8);
  flex-shrink: 0;
}

.header-actions__cta {
  font-size: var(--fs-13);
  padding: var(--sp-6) var(--sp-16);
  box-shadow: 0 2px 10px -2px rgba(15, 44, 102, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.18);
  letter-spacing: 0.015em;
}

.header-actions__cta:hover {
  box-shadow: 0 6px 22px -4px rgba(15, 44, 102, 0.55),
    inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.header-actions__cta:active {
  box-shadow: 0 2px 8px -2px rgba(15, 44, 102, 0.35);
}

/* ── Language switcher ──────────────────────────────────────────────────── */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0;
  padding: 3px;
  border-radius: var(--r-pill);
  border: 1.5px solid var(--c-border);
  background: var(--c-bg-soft);
}

.lang-switch__btn {
  padding: 3px var(--sp-8);
  font-size: var(--fs-12);
  font-weight: 700;
  color: var(--c-text-muted);
  border-radius: var(--r-pill);
  letter-spacing: 0.04em;
  transition: color var(--transition-fast), background var(--transition-fast),
    box-shadow var(--transition-fast);
}

.lang-switch__btn.is-active {
  background: var(--c-primary);
  color: #fff;
  box-shadow: 0 2px 8px -2px rgba(15, 44, 102, 0.45);
  cursor: default;
  pointer-events: none;
}

.lang-switch__btn:hover:not(.is-active) {
  color: var(--c-primary);
  background: rgba(19, 58, 124, 0.08);
}

.lang-switch__sep {
  display: none;
}

/* ── Icon button (search) inside header ─────────────────────────────────── */
.header-actions .icon-btn {
  border: 1.5px solid transparent;
  width: 36px;
  height: 36px;
  transition: background var(--transition-fast), color var(--transition-fast),
    border-color var(--transition-fast), transform var(--transition-fast);
}

.header-actions .icon-btn:hover {
  background: var(--c-bg-soft);
  border-color: var(--c-border);
  color: var(--c-primary-700);
  transform: scale(1.08);
}

/* ── Hamburger ──────────────────────────────────────────────────────────── */
.hamburger {
  display: none;
  width: var(--tap-min);
  height: var(--tap-min);
  align-items: center;
  justify-content: center;
  border-radius: var(--r-pill);
  border: 1.5px solid transparent;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.hamburger:hover {
  background: var(--c-bg-soft);
  border-color: var(--c-border);
}

.hamburger__line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-primary-700);
  margin: 3px 0;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.hamburger[aria-expanded="true"] .hamburger__line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.hamburger[aria-expanded="true"] .hamburger__line:nth-child(2) {
  opacity: 0;
}

.hamburger[aria-expanded="true"] .hamburger__line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ── Mobile nav drawer ──────────────────────────────────────────────────── */
.mobile-nav {
  position: fixed;
  inset: var(--header-h) 0 0 0;
  background: var(--c-bg);
  padding: var(--sp-24);
  z-index: var(--z-mobile-nav);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.mobile-nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-8);
}

.mobile-nav__link {
  display: block;
  padding: var(--sp-16);
  border-radius: var(--r-md);
  background: var(--c-bg-soft);
  color: var(--c-text);
  font-weight: 600;
}

.mobile-nav__link--cta {
  background: var(--c-primary);
  color: #fff;
  text-align: center;
}

.mobile-nav__item {
  display: block;
}

/* ── Mobile submenu row (link + toggle side by side) ───────────────────── */
.mobile-nav__row {
  display: flex;
  align-items: stretch;
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--c-bg-soft);
}

.mobile-nav__row .mobile-nav__link {
  flex: 1;
  border-radius: 0;
  background: transparent;
  border-right: 1px solid var(--c-border);
}

.mobile-nav__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--tap-min);
  flex-shrink: 0;
  background: transparent;
  color: var(--c-text-muted);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.mobile-nav__toggle svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.mobile-nav__toggle[aria-expanded="true"] svg {
  transform: rotate(180deg);
}

.mobile-nav__toggle:hover {
  color: var(--c-primary);
  background: var(--c-accent-muted);
}

/* ── Mobile submenu list ──────────────────────────────────────────────────── */
.mobile-nav__sub {
  list-style: none;
  padding: var(--sp-4) 0 var(--sp-8) 0;
  margin: var(--sp-4) 0 0 var(--sp-16);
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  border-left: 2px solid var(--c-accent-muted);
}

.mobile-nav__sub-link {
  display: block;
  padding: var(--sp-8) var(--sp-12);
  border-radius: var(--r-sm);
  font-size: var(--fs-14);
  font-weight: 500;
  color: var(--c-text-muted);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.mobile-nav__sub-link:hover {
  color: var(--c-primary);
  background: var(--c-bg-soft);
}

.mobile-nav__sub-link.is-active {
  color: var(--c-primary);
  font-weight: 700;
}

.mobile-nav__link.is-active {
  color: var(--c-primary);
  background: var(--c-accent-muted);
}

/* ── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 1023px) {
  /* На мобільному залишається тільки рядок 1 (60px) */
  :root {
    --header-h: 60px;
  }

  .site-header__nav-bar {
    display: none;
  }

  .hamburger {
    display: inline-flex;
  }

  .header-actions__cta {
    display: none;
  }
}

@media (max-width: 480px) {
  .site-header__inner {
    padding-inline: var(--sp-16);
    gap: var(--sp-8);
  }

  .lang-switch {
    padding: 2px;
  }

  .lang-switch__btn {
    padding: 3px var(--sp-6);
  }
}