/**
 * header.css — BEM: header, header__*
 */

.header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background-color: var(--color-bg-primary);
  box-shadow: var(--shadow-header);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.85rem;
}

.header__logo img {
  height: 36px;
  width: auto;
}

.header__nav {
  display: none;
}

.header__nav-list {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.header__nav-link {
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  padding-block: 0.5rem;
  border-bottom: 2px solid transparent;
}

.header__nav-link:hover,
.header__nav-link:focus-visible {
  color: var(--color-white);
}

.header__nav-link--active {
  color: var(--color-heading-gold);
  border-bottom-color: var(--color-heading-gold);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.header__login,
.header__register {
  padding: 0.6rem 1rem;
  font-size: var(--font-size-small);
}

.header__flag {
  display: none;
  align-items: center;
  gap: 0.35rem;
  font-size: var(--font-size-small);
  color: var(--color-text);
}

.header__flag img {
  border-radius: 3px;
}

.header__burger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 34px;
  height: 34px;
  padding: 6px;
  flex-shrink: 0;
}

.header__burger-line {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--color-white);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.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);
}

.header__mobile-menu {
  display: none;
  gap: 0.25rem;
  padding: 1rem clamp(1rem, 4vw, 2.5rem) 1.5rem;
  background-color: var(--color-bg-dark);
}

.header__mobile-menu.is-open {
  display: grid;
}

.header__mobile-list {
  display: grid;
  gap: 0.25rem;
  margin-block-end: 1rem;
}

.header__mobile-link {
  display: block;
  padding: 0.85rem 0.5rem;
  font-size: var(--font-size-base);
  color: var(--color-white);
  border-bottom: 1px solid rgba(168, 161, 154, 0.15);
}

.header__mobile-actions {
  display: grid;
  gap: 0.6rem;
}

@media (min-width: 768px) {
  .header__flag {
    display: flex;
  }
}

@media (min-width: 1024px) {
  .header__nav {
    display: block;
  }

  .header__burger {
    display: none;
  }

  .header__mobile-menu,
  .header__mobile-menu.is-open {
    display: none;
  }
}