/* =========================================================
   Header block
   ========================================================= */
.header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-cold-blue);
  box-shadow: var(--shadow-header);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding-block: var(--space-md);
}

.header__logo { flex-shrink: 0; line-height: 0; }
.header__logo img { height: 36px; width: auto; }

/* Desktop nav hidden on mobile */
.header__nav { display: none; }

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

.header__nav-item { position: relative; display: flex; align-items: center; }

.header__nav-link {
  color: var(--color-text-primary);
  font-weight: var(--font-weight-medium);
  padding: 0.5em 0.1em;
  transition: color var(--transition-fast);
}

.header__nav-link:hover,
.header__nav-link--active {
  color: var(--color-heading-accent);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.header__login { display: none; }
.header__register { display: none; }

.header__flag {
  display: inline-flex;
  width: 24px;
  height: 16px;
  border-radius: 2px;
  overflow: hidden;
  border: 1px solid var(--color-cold-blue);
  flex-shrink: 0;
}

.header__flag img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.header__burger {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  padding: 4px;
}

.header__burger-line {
  display: block;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.header__burger[aria-expanded="true"] .header__burger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.header__burger[aria-expanded="true"] .header__burger-line:nth-child(2) { opacity: 0; }
.header__burger[aria-expanded="true"] .header__burger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile flyout menu */
.header__mobile {
  max-height: 0;
  overflow: hidden;
  background: var(--color-bg-dark);
  transition: max-height var(--transition-base) ease;
}

.header__mobile.is-open { max-height: 100vh; overflow-y: auto; }

.header__mobile-inner { padding-block: var(--space-lg); }

.header__mobile-cta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.header__mobile-list { display: grid; gap: 2px; }

.header__mobile-link {
  display: block;
  padding: var(--space-sm) var(--space-xs);
  color: var(--color-text-primary);
  font-weight: var(--font-weight-medium);
  border-bottom: 1px solid var(--color-cold-blue);
}

.header__mobile-link--sub {
  padding-left: var(--space-lg);
  font-size: var(--font-size-sm);
  color: #8a93a8;
}

.header__mobile-link:hover,
.header__mobile-link--active {
  color: var(--color-heading-accent);
}

@media (min-width: 768px) {
  .header__nav { display: block; }
  .header__burger { display: none; }
  .header__mobile { display: none; }
  .header__login,
  .header__register { display: inline-flex; }
}

@media (min-width: 1024px) {
  .header__nav-list { gap: var(--space-xl); }
}