/* =====================
   HEADER
   ===================== */

.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 500;
  background-color: var(--color-background);
  height: 64px;
  display: flex;
  align-items: center;
  transition: box-shadow 200ms ease;
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

@media (min-width: 768px) {
  .site-header {
    height: 72px;
  }
}

.header-inner {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-base);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-xl);
}

@media (min-width: 768px) {
  .header-inner {
    padding: 0 var(--spacing-xl);
  }
}

@media (min-width: 1024px) {
  .header-inner {
    padding: 0 var(--spacing-2xl);
  }
}

/* Logo + lang group */
.header-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-shrink: 0;
}

/* Logo */
.header-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.header-logo img {
  height: 36px;
  width: auto;
}

/* Desktop nav */
.header-nav {
  display: none;
  align-items: center;
  gap: var(--spacing-xl);
}

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

.header-nav a {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color 150ms;
  position: relative;
  padding-bottom: 4px;
}

.header-nav a:hover,
.header-nav a.active {
  color: var(--color-primary);
}

.header-nav a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: var(--radius-full);
}

/* Header actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* Cart button */
.cart-btn {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  transition: all 150ms;
  text-decoration: none;
}

.cart-btn:hover {
  background-color: var(--color-surface-alt);
  color: var(--color-primary);
}

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

.lang-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  height: 36px;
  padding: 0 var(--spacing-sm);
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  transition: all 150ms;
}

.lang-btn:hover {
  background-color: var(--color-surface-alt);
}

.lang-flag {
  width: 20px;
  height: 14px;
  border-radius: 2px;
  object-fit: cover;
  display: block;
  flex-shrink: 0;
}

.lang-code {
  font-size: var(--font-size-xs);
  letter-spacing: 0.05em;
}

.lang-chevron {
  transition: transform 150ms;
}

.lang-dropdown.open ~ .lang-btn .lang-chevron,
.lang-btn[aria-expanded="true"] .lang-chevron {
  transform: rotate(180deg);
}

.lang-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  min-width: 150px;
  overflow: hidden;
  z-index: 600;
}

.lang-dropdown.open {
  display: block;
}

.lang-option {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: none;
  border: none;
  cursor: pointer;
  font-size: var(--font-size-sm);
  color: var(--color-text-primary);
  text-align: left;
  transition: background 150ms;
}

.lang-option:hover {
  background-color: var(--color-surface-alt);
}

.lang-option-flag {
  width: 20px;
  height: 14px;
  border-radius: 2px;
  object-fit: cover;
  display: block;
  flex-shrink: 0;
}

/* Cart badge */
.cart-badge {
  position: absolute;
  top: 4px;
  right: 4px;
  min-width: 18px;
  height: 18px;
  background-color: var(--color-error);
  color: white;
  font-size: 10px;
  font-weight: var(--font-weight-bold);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
  display: none;
}

.cart-badge.visible {
  display: flex;
}

/* Auth button */
.auth-btn {
  display: none;
}

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

/* User menu */
.user-menu {
  display: none;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: background-color 150ms;
}

.user-menu:hover {
  background-color: var(--color-surface-alt);
}

.user-menu.visible {
  display: flex;
}

.user-avatar {
  width: 32px;
  height: 32px;
  background-color: var(--color-primary);
  color: white;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
}

.user-name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
}

/* Hamburger */
.hamburger-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  border-radius: var(--radius-md);
  transition: background-color 150ms;
  flex-shrink: 0;
}

.hamburger-btn:hover {
  background-color: var(--color-surface-alt);
}

@media (min-width: 768px) {
  .hamburger-btn {
    display: none;
  }
}

.hamburger-line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text-primary);
  border-radius: var(--radius-full);
  transition: transform 300ms ease, opacity 300ms ease;
  transform-origin: center;
}

.hamburger-btn.open .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger-btn.open .hamburger-line:nth-child(2) {
  opacity: 0;
}

.hamburger-btn.open .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Drawer */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 80vw;
  max-width: 320px;
  background-color: var(--color-background);
  z-index: 600;
  transform: translateX(100%);
  transition: transform 300ms ease;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
}

.mobile-drawer.open {
  transform: translateX(0);
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-base);
  border-bottom: 1px solid var(--color-border);
  height: 64px;
}

.drawer-close-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  transition: all 150ms;
}

.drawer-close-btn:hover {
  background-color: var(--color-surface-alt);
  color: var(--color-text-primary);
}

.drawer-nav {
  padding: var(--spacing-base);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  flex: 1;
  overflow-y: auto;
}

.drawer-nav a {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-base);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all 150ms;
}

.drawer-nav a:hover,
.drawer-nav a.active {
  background-color: var(--color-surface-alt);
  color: var(--color-primary);
}

.drawer-nav a .material-symbols-rounded {
  font-size: 18px;
  line-height: 1;
}

.drawer-footer {
  padding: var(--spacing-base);
  border-top: 1px solid var(--color-border);
}

.drawer-user-section {
  margin-bottom: var(--spacing-base);
}

.drawer-user-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background-color: var(--color-surface-alt);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
}

.drawer-user-name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

.drawer-user-email {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}