/* Header Component */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-index-fixed);
  /* background-color: rgba(255, 255, 255, 0.95); */
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-primary);
  transition: all var(--transition-normal);
}

.header--scrolled {
  background-color: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-md);
}

.header__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) 0;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding-left: var(--spacing-md);
  padding-right: var(--spacing-md);
}

@media (min-width: 640px) {
  .header__container {
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
  }
}

@media (min-width: 1024px) {
  .header__container {
    padding-left: var(--spacing-xl);
    padding-right: var(--spacing-xl);
  }
}

/* Logo */
.header__logo {
  display: flex;
  align-items: center;
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  /* color: var(--color-primary); */
  text-decoration: none;
  transition: color var(--transition-fast);
}

.header__logo:hover {
  color: var(--color-secondary);
  text-decoration: none;
}

.header__logo-icon {
  width: 32px;
  height: 32px;
  margin-right: var(--spacing-sm);
  fill: currentColor;
}

/* Navigation */
.header__nav {
  display: none;
}

@media (min-width: 768px) {
  .header__nav {
    display: flex;
    align-items: center;
  }
}

.header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin: 0;
  padding: 0;
  list-style: none;
}

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

.header__nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  /* color: var(--color-gray-800); */
  text-decoration: none;
  padding: var(--spacing-sm) var(--spacing-xs);
  transition: color var(--transition-fast);
  white-space: nowrap;
}

@media (min-width: 1024px) {
  .header__nav-link {
    font-size: var(--font-size-base);
    padding: var(--spacing-sm) 0;
  }
}

.header__nav-link:hover,
.header__nav-link:focus {
  color: var(--color-secondary-dark);
  text-decoration: none;
}

.header__nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-secondary);
  transition: width var(--transition-normal);
}

.header__nav-link:hover::after,
.header__nav-link:focus::after,
.header__nav-link--active::after {
  width: 100%;
}

.header__nav-link--active {
  color: var(--color-secondary-dark);
  font-weight: var(--font-weight-bold);
}

/* Actions */
.header__actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* Language Switcher */
.lang-switcher {
  position: relative;
}

.lang-switcher__button {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  background: transparent;
  border: 1px solid var(--border-primary);
  border-radius: var(--border-radius-lg);
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: none;
}

.lang-switcher__button:hover,
.lang-switcher__button:focus {
  border-color: var(--color-secondary);
  background-color: var(--bg-secondary);
}

.lang-switcher__icon {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.lang-switcher__button[aria-expanded="true"] .lang-switcher__icon {
  transform: rotate(180deg);
}

.lang-switcher__dropdown {
  position: absolute;
  top: calc(100% + var(--spacing-xs));
  right: 0;
  min-width: 120px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
  z-index: var(--z-index-dropdown);
}

.lang-switcher__dropdown--open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-switcher__option {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-primary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: background-color var(--transition-fast);
}

.lang-switcher__option:hover,
.lang-switcher__option:focus {
  background-color: var(--bg-secondary);
}

.lang-switcher__option--active {
  background-color: var(--color-secondary);
  color: var(--color-white);
}

.lang-switcher__flag {
  width: 20px;
  height: 15px;
  border-radius: 2px;
  object-fit: cover;
}

/* Mobile Menu */
.mobile-menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--border-accent);
  border: none;
  cursor: pointer;
  padding: 0;
  border-radius: var(--border-radius-lg);
  transition: background-color var(--transition-fast);
}

.mobile-menu-toggle:hover {
  background-color: var(--bg-secondary);
}

@media (min-width: 768px) {
  .mobile-menu-toggle {
    display: none;
  }
}

.mobile-menu-toggle__icon {
  position: relative;
  width: 24px;
  height: 2px;
  background-color: var(--color-gray-800);
  transition: all var(--transition-fast);
}

.mobile-menu-toggle__icon::before,
.mobile-menu-toggle__icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 24px;
  height: 2px;
  background-color: var(--color-gray-800);
  transition: all var(--transition-fast);
}

.mobile-menu-toggle__icon::before {
  top: -8px;
}

.mobile-menu-toggle__icon::after {
  bottom: -8px;
}

.mobile-menu-toggle--active .mobile-menu-toggle__icon {
  background-color: transparent;
}

.mobile-menu-toggle--active .mobile-menu-toggle__icon::before {
  top: 0;
  transform: rotate(45deg);
}

.mobile-menu-toggle--active .mobile-menu-toggle__icon::after {
  bottom: 0;
  transform: rotate(-45deg);
}

/* Mobile Menu Overlay */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background-color: var(--bg-primary);
  z-index: var(--z-index-modal);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

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

.mobile-menu__content {
  position: relative;
  padding: var(--spacing-4xl) var(--spacing-md) var(--spacing-md);
  height: 100%;
  overflow-y: auto;
}

.mobile-menu__close {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  width: 44px;
  height: 44px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1;
  border-radius: var(--border-radius-lg);
  transition: background-color var(--transition-fast);
}

.mobile-menu__close:hover {
  background-color: var(--bg-secondary);
}

.mobile-menu__close-icon {
  position: relative;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-menu__close-icon::before,
.mobile-menu__close-icon::after {
  content: "";
  position: absolute;
  width: 20px;
  height: 2px;
  background-color: var(--color-secondary);
  transition: all var(--transition-fast);
}

.mobile-menu__close-icon::before {
  transform: rotate(45deg);
}

.mobile-menu__close-icon::after {
  transform: rotate(-45deg);
}

.mobile-menu__nav {
  margin-bottom: var(--spacing-2xl);
}

.mobile-menu__nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.mobile-menu__nav-link {
  display: block;
  padding: var(--spacing-md) 0;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--border-primary);
  transition: color var(--transition-fast);
}

.mobile-menu__nav-link:hover,
.mobile-menu__nav-link:focus,
.mobile-menu__nav-link--active {
  color: var(--color-secondary);
}

.mobile-menu__actions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

/* CTA Button */
.header__cta {
  display: none;
}

@media (min-width: 1024px) {
  .header__cta {
    display: inline-flex;
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  .header,
  .header__nav-link::after,
  .lang-switcher__dropdown,
  .mobile-menu {
    transition: none;
  }
}

/* Focus styles */
.header__logo:focus,
.header__nav-link:focus,
.lang-switcher__button:focus,
.mobile-menu-toggle:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}