.header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-nav-accent);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: 14px;
}

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

.header__nav {
  display: none;
}

.header__nav-list {
  display: flex;
  align-items: center;
  gap: 28px;
}

.header__nav-link {
  font-weight: var(--fw-medium);
  color: var(--color-text);
  padding-block: 8px;
  position: relative;
  transition: color var(--transition-fast);
}

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

.header__nav-link--active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--color-heading-accent);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header__flag {
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.header__login,
.header__register {
  display: none;
  padding: 10px 18px;
  font-size: var(--fs-small);
}

.header__burger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  order: 3;
}

.header__burger-line {
  width: 22px;
  height: 2px;
  background: var(--color-white);
  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);
}

.header__mobile-menu {
  display: none;
  flex-direction: column;
  gap: 24px;
  padding: 20px var(--container-pad) 28px;
  background: var(--color-bg-dark);
  border-top: 1px solid var(--color-nav-accent);
  max-height: calc(100dvh - 64px);
  overflow-y: auto;
}

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

.header__mobile-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.header__mobile-link {
  display: block;
  padding: 14px 4px;
  font-weight: var(--fw-medium);
  font-size: 16px;
  color: var(--color-text);
  border-bottom: 1px solid rgba(57, 73, 80, 0.5);
}

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

.header__mobile-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

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

  .header__login,
  .header__register {
    display: inline-flex;
  }

  .header__burger {
    display: none;
  }

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