.header {
  background-color: var(--color-bg);
  padding: var(--spacing-lg) 0;
  position: sticky;
  top: 0;
  z-index: 10;
  transition: background-color var(--transition-base);
}

.header-scrolled {
  background-color: var(--main-blue);
}

.header__logo-default {
  display: block;
}

.header__logo-scrolled {
  display: none;
}

.header-scrolled .header__logo-default {
  display: none;
}

.header-scrolled .header__logo-scrolled {
  display: block;
}

.header__logo-default-small,
.header__logo-scrolled-small {
  display: none;
  width: 65px;
  height: 42px;
}

.header-scrolled .header__nav-link,
.header-scrolled .header__language-text {
  color: var(--00);
}

.header-scrolled .header__chevron-icon {
  -webkit-filter: brightness(0) invert(1);
  filter: brightness(0) invert(1);
}

.header-scrolled .header__menu-toggle span {
  background-color: var(--00);
}

.header-scrolled .header__contact-btn {
  background-color: var(--00);
  color: var(--main-blue);
}

.header-scrolled .header__contact-btn:hover {
  background-color: var(--03);
}

.container.header__container {
  padding-inline: clamp(1rem, 2.5vw, 5rem);
}

@media (min-width: 1200px) {
  .container.header__container {
    padding-inline: 5rem;
  }
}

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

.header__logo {
  max-height: 42px;
  flex-shrink: 0;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  flex: 1;
  justify-content: center;
}

.header__nav-list {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
}

.header__nav-link {
  font-size: var(--font-size-base);
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--90);
  white-space: nowrap;
}

.header__nav-link:hover,
.header__nav-link.active,
.mobile-menu__nav-link:hover,
.mobile-menu__nav-link.active,
.header-scrolled .header__nav-link.active {
  color: var(--20);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  flex-shrink: 0;
}

.header__language-wrapper {
  position: relative;
}

.header__language {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
  border: none;
  background: transparent;
}

.header__language:hover {
  background-color: transparent;
}

.header__language[aria-expanded="true"] {
  background-color: transparent;
}

.header__language[aria-expanded="true"] .header__chevron-icon {
  transform: rotate(180deg);
}

.header__language-text {
  font-size: var(--font-size-base);
  color: var(--color-text);
}

.header__language-icon,
.mobile-menu__language-icon {
  width: 16px;
  height: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.header__chevron-icon,
.mobile-menu__chevron-icon {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform var(--transition-fast);
}

.header__language-dropdown {
  position: absolute;
  top: calc(100% + var(--spacing-xs));
  right: 0;
  background-color: var(--00);
  border: 1px solid var(--color-bg-light);
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  list-style: none;
  padding: var(--spacing-xs);
  margin: 0;
  min-width: 140px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity var(--transition-fast), visibility var(--transition-fast), transform var(--transition-fast);
  z-index: 10;
}

.header__language-wrapper[data-open] .header__language-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.header__language-option {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: var(--font-size-base);
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.header__language-option:hover {
  background-color: var(--color-bg-light);
}

.header__nav-link,
.mobile-menu__nav-link {
  transition: color var(--transition-fast);
}

.header__contact-btn,
.mobile-menu__contact-btn {
  background: var(--main-blue);
  color: var(--00);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-full);
  width: 135px;
  height: 46px;
  transition: background-color var(--transition-fast);
  border: none;
  cursor: pointer;
}

.header__contact-btn {
  flex-shrink: 0;
}

.header__contact-btn:hover,
.mobile-menu__contact-btn:hover {
  background-color: var(--dark-blue);
}

.header__menu-toggle {
  display: none;
  flex-direction: column;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs);
}

.header__menu-toggle span {
  width: 30px;
  height: 2px;
  min-height: 2px;
  flex-shrink: 0;
  background-color: var(--main-blue);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  display: block;
}

@media (min-width: 769px) and (max-width: 900px) {
  .header__logo-default,
  .header__logo-scrolled {
    display: none;
  }

  .header__logo-default-small {
    display: block;
  }

  .header-scrolled .header__logo-default-small,
  .header-scrolled .header__logo-scrolled {
    display: none;
  }

  .header-scrolled .header__logo-scrolled-small {
    display: block;
  }
}

@media (max-width: 1024px) {
  .header__nav-list,
  .header__actions {
    gap: var(--spacing-md);
  }
}

@media (max-width: 768px) {
  .header__nav,
  .header__actions {
    display: none;
  }

  .header__menu-toggle {
    display: flex;
  }

  .header__logo-default {
    display: block;
  }

  .header__logo-scrolled {
    display: none;
  }

  .header__logo-default-small,
  .header__logo-scrolled-small {
    display: none;
  }

  .header-scrolled .header__logo-default {
    display: none;
  }

  .header-scrolled .header__logo-scrolled {
    display: block;
  }
}

/* Mobile Menu Overlay */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 10;
  visibility: hidden;
  opacity: 0;
  transition: visibility var(--transition-base), opacity var(--transition-base);
}

.mobile-menu--active {
  visibility: visible;
  opacity: 1;
}

.mobile-menu__overlay {
  position: absolute;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.mobile-menu--active .mobile-menu__overlay {
  opacity: 1;
}

.mobile-menu__content {
  position: absolute;
  top: 0;
  right: 0;
  width: 320px;
  max-width: 85vw;
  height: 100%;
  background-color: var(--00);
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: -2px 0 8px rgba(0, 0, 0, 0.1);
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform var(--transition-base);
}

.mobile-menu--active .mobile-menu__content {
  transform: translateX(0);
}

.mobile-menu__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.mobile-menu__language-wrapper {
  position: relative;
}

.mobile-menu__language {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  border: none;
  background: transparent;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.mobile-menu__language[aria-expanded="true"] .mobile-menu__chevron-icon {
  transform: rotate(180deg);
}

.mobile-menu__language-text {
  font-size: 1.25rem;
  color: var(--color-text);
}

.mobile-menu__language-dropdown {
  position: absolute;
  top: calc(100% + var(--spacing-xs));
  left: 0;
  background-color: var(--00);
  border: 1px solid var(--color-bg-light);
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  list-style: none;
  padding: var(--spacing-xs);
  margin: 0;
  min-width: 160px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity var(--transition-fast), visibility var(--transition-fast),
    transform var(--transition-fast);
  z-index: 11;
}

.mobile-menu__language-wrapper[data-open] .mobile-menu__language-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.mobile-menu__language-option {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 1.125rem;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.mobile-menu__language-option:hover {
  background-color: var(--color-bg-light);
}

.mobile-menu__close {
  padding: var(--spacing-xs);
  transition: opacity var(--transition-fast);
}

.mobile-menu__close:hover {
  opacity: 0.7;
}

.mobile-menu__close-icon {
  width: 22px;
  height: 22px;
  display: block;
}

.mobile-menu__center {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  gap: var(--spacing-2xl);
}

.mobile-menu__nav {
  display: flex;
  justify-content: center;
}

.mobile-menu__nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  align-items: center;
}

.mobile-menu__nav-link {
  font-size: 1.25rem;
  color: var(--90);
  text-align: center;
}