/**
 * 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(168, 161, 154, 0.12);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.5rem;
}

.site-header__logo { flex-shrink: 0; }
.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;
}

.site-header__nav-link {
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  color: var(--color-text-primary);
  transition: color var(--transition-base);
}
.site-header__nav-link:hover,
.site-header__nav-link[aria-current='page'] {
  color: var(--color-heading-gold);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.site-header__login,
.site-header__register {
  padding: 0.6rem 1.15rem;
  font-size: var(--fs-small);
}

.site-header__flag { font-size: 1.25rem; line-height: 1; }

.site-header__burger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0.5rem;
  border-radius: var(--radius-card);
}
.site-header__burger:hover { background-color: var(--color-bg-dark); }
.site-header__burger-line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-white);
  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);
}

.site-header__mobile-menu {
  display: none;
  max-height: 0;
  overflow: hidden;
  background-color: var(--color-bg-dark);
  transition: max-height var(--transition-base);
}
.site-header__mobile-menu[data-open='true'] {
  display: block;
  max-height: 32rem;
}

.site-header__mobile-list {
  display: flex;
  flex-direction: column;
  padding: 0.5rem 1rem 1.5rem;
}

.site-header__mobile-item { border-bottom: 1px solid rgba(168, 161, 154, 0.12); }
.site-header__mobile-item--actions {
  border-bottom: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding-top: 1rem;
}

.site-header__mobile-link {
  display: block;
  padding: 0.9rem 0.25rem;
  font-weight: var(--fw-medium);
  color: var(--color-white);
}
.site-header__mobile-link[aria-current='page'] { color: var(--color-heading-gold); }

@media (min-width: 1024px) {
  .site-header__nav { display: block; }
  .site-header__burger { display: none; }
  .site-header__mobile-menu,
  .site-header__mobile-menu[data-open='true'] { display: none; }
}