/**
 * header.css — BEM: site-header
 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg-primary);
  border-bottom: 1px solid rgba(209, 170, 65, 0.15);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.875rem;
}
.site-header__logo img {
  height: 2.25rem;
  width: auto;
}

.site-header__nav {
  display: none;
}
.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}
.site-header__nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-white);
  padding-block: 0.5rem;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}
.site-header__nav-link:hover,
.site-header__nav-link--active {
  color: var(--color-gold);
  border-color: var(--color-gold);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}
.site-header__cta {
  padding: 0.625rem 1rem;
  font-size: 0.8125rem;
}
.site-header__flag {
  display: none;
  font-size: 1.375rem;
  line-height: 1;
}

.site-header__burger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-sm);
}
.site-header__burger-line {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-gold);
  transition: transform var(--transition-base), opacity var(--transition-base);
}
.site-header__burger[aria-expanded="true"] .site-header__burger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.site-header__burger[aria-expanded="true"] .site-header__burger-line:nth-child(2) {
  opacity: 0;
}
.site-header__burger[aria-expanded="true"] .site-header__burger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-menu {
  max-height: 0;
  overflow: hidden;
  background-color: var(--color-bg-dark);
  transition: max-height var(--transition-base);
}
.mobile-menu--open {
  max-height: 100dvh;
  overflow-y: auto;
}
.mobile-menu__list {
  list-style: none;
  padding: 0.5rem 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
}
.mobile-menu__link {
  display: block;
  padding: 0.875rem 0;
  font-size: 1rem;
  font-weight: 500;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

@media (min-width: 1024px) {
  .site-header__nav { display: block; }
  .site-header__flag { display: inline-flex; }
  .site-header__burger { display: none; }
  .mobile-menu { display: none; }
}