/* ========================================
   HEADER & NAVIGATION STYLES
   ======================================== */

.main-header {
  position: sticky;
  top: 0;
  z-index: var(--z-fixed);
  background: var(--card);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.header-wrapper, .header-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  padding: var(--space-md) 0;
  flex-wrap: wrap;
}

/* ========================================
   LOGO
   ======================================== */

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: var(--text-xl);
  font-weight: var(--font-weight-bold);
  color: var(--text);
  transition: all var(--transition-fast);
  flex-shrink: 0;
  min-width: fit-content;
}

.logo:hover {
  color: var(--primary);
}

.logo i {
  font-size: var(--text-2xl);
  color: var(--primary);
}

/* ========================================
   NAVIGATION
   ======================================== */

.nav, .nav-menu {
  display: flex;
  gap: var(--space-xl);
  margin-left: auto;
  margin-right: auto;
}

.nav-link {
  font-weight: var(--font-weight-semibold);
  color: var(--text-secondary);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--primary);
  background: var(--bg);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition-base);
}

.nav-link:hover::after {
  width: 100%;
}

/* ========================================
   SEARCH BAR
   ======================================== */

.search-bar {
  display: flex;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-lg);
  gap: var(--space-md);
  max-width: 350px;
  flex: 1;
  min-width: 200px;
}

.search-input {
  border: none;
  background: transparent;
  flex: 1;
  color: var(--text);
  font-size: var(--text-base);
}

.search-input::placeholder {
  color: var(--text-secondary);
}

.search-input:focus {
  outline: none;
  box-shadow: none;
}

.search-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
}

.search-btn:hover {
  color: var(--primary);
}

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

.header-icons {
  display: flex;
  gap: var(--space-md);
  align-items: center;
}

.icon-btn {
  position: relative;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 50%;
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--text);
  font-size: var(--text-lg);
}

.icon-btn:hover {
  background: var(--bg);
  border-color: var(--primary);
  color: var(--primary);
}

.icon-badge {
  position: absolute;
  top: -8px;
  right: -8px;
  background: var(--accent);
  color: white;
  font-size: var(--text-xs);
  font-weight: var(--font-weight-bold);
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 2px solid var(--card);
}

/* ========================================
   HAMBURGER MENU (MOBILE)
   ======================================== */

.hamburger-btn {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  align-items: center;
}

.hamburger-btn span {
  width: 24px;
  height: 2.5px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.hamburger-btn.active span:nth-child(1) {
  transform: translateY(10px) rotate(45deg);
}

.hamburger-btn.active span:nth-child(2) {
  opacity: 0;
}

.hamburger-btn.active span:nth-child(3) {
  transform: translateY(-10px) rotate(-45deg);
}

/* ========================================
   MOBILE MENU
   ======================================== */

.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100vh;
  background: var(--card);
  z-index: var(--z-modal-backdrop);
  transition: left var(--transition-base);
  padding-top: 100px;
  box-shadow: var(--shadow-lg);
}

.mobile-menu.active {
  left: 0;
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.mobile-nav-link {
  padding: var(--space-lg);
  border-bottom: 1px solid var(--border);
  color: var(--text);
  transition: all var(--transition-fast);
  display: block;
}

.mobile-nav-link:hover {
  background: var(--bg);
  color: var(--primary);
  padding-left: var(--space-2xl);
}

/* ========================================
   CART SIDEBAR
   ======================================== */

.cart-sidebar {
  position: fixed;
  top: 0;
  right: -420px;
  width: 420px;
  max-width: 100%;
  height: 100vh;
  background: var(--card);
  z-index: var(--z-modal);
  box-shadow: var(--shadow-xl);
  transition: right var(--transition-base);
  display: flex;
  flex-direction: column;
}

.cart-sidebar.active {
  right: 0;
}

.cart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-xl);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.cart-header h2 {
  margin: 0;
  font-size: var(--text-2xl);
}

.cart-close {
  background: transparent;
  border: none;
  font-size: var(--text-xl);
  cursor: pointer;
  color: var(--text);
  padding: 0;
}

.cart-close:hover {
  color: var(--primary);
}

.cart-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-lg);
}

.cart-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  height: 100%;
  text-align: center;
  color: var(--text-secondary);
}

.cart-empty i {
  font-size: 56px;
  color: var(--border-dark);
}

.cart-empty p {
  margin: 0;
}

.cart-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: var(--space-md);
  padding: var(--space-lg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
}

.cart-item-image {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: var(--radius-md);
  background: var(--bg);
}

.cart-item-info {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.cart-item-name {
  font-weight: var(--font-weight-semibold);
  color: var(--text);
  margin-bottom: var(--space-xs);
  line-height: var(--line-height-tight);
}

.cart-item-price {
  color: var(--primary);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-sm);
}

.cart-item-controls {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.qty-control {
  display: flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.qty-control button {
  background: var(--bg);
  border: none;
  width: 28px;
  height: 28px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.qty-control button:hover {
  background: var(--primary);
  color: white;
}

.qty-control input {
  width: 40px;
  height: 28px;
  border: none;
  text-align: center;
  padding: 0;
}

.cart-remove-btn {
  background: transparent;
  border: none;
  color: var(--error);
  cursor: pointer;
  margin-left: auto;
  transition: all var(--transition-fast);
}

.cart-remove-btn:hover {
  color: var(--accent);
}

.cart-footer {
  border-top: 1px solid var(--border);
  padding: var(--space-xl);
  flex-shrink: 0;
}

.cart-summary {
  margin-bottom: var(--space-xl);
}

.summary-row {
  display: flex;
  justify-content: space-between;
  padding: var(--space-sm) 0;
  color: var(--text-secondary);
}

.summary-row.total {
  font-weight: var(--font-weight-bold);
  color: var(--text);
  font-size: var(--text-lg);
  border-top: 1px solid var(--border);
  padding-top: var(--space-md);
  margin-top: var(--space-md);
}

.cart-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal-backdrop);
  display: none;
}

.cart-overlay.active {
  display: block;
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 1024px) {
  .header-wrapper {
    flex-wrap: wrap;
    padding: var(--space-md) 0;
  }
  /* On tablets and smaller, only HIDE navigation items visually (keep layout unchanged).
     Use visibility so header height/spacing remains identical to desktop. The bottom nav
     will provide the navigation on mobile/tablet. */
  .nav, .nav-menu, .nav-link {
    visibility: hidden; /* hides content but preserves layout space */
    opacity: 0;
    pointer-events: none;
  }

  /* Hide header icons (cart/account) visually but keep header structure intact */
  .header-icons {
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
  }

  .hamburger-btn {
    display: flex;
  }
}

@media (max-width: 768px) {
  .header-wrapper {
    gap: var(--space-md);
  }

  .logo {
    font-size: var(--text-lg);
  }

  .hamburger-btn {
    display: flex;
  }

  /* visually hide navigation links but preserve layout spacing */
  .nav, .nav-menu, .nav-link { visibility: hidden; opacity: 0; pointer-events: none; }

  /* Keep search bar visible on mobile unless your design explicitly hides it */
  .search-bar { display: block; }

  .mobile-menu {
    display: block;
  }

  .header-icons {
    order: 2;
  }

  .cart-sidebar {
    right: -100%;
    width: 100%;
  }

  .icon-btn {
    width: 36px;
    height: 36px;
    font-size: var(--text-base);
  }
}

@media (max-width: 640px) {
  .search-bar {
    flex-basis: 100%;
    margin-top: var(--space-md);
    padding: var(--space-sm) var(--space-md);
  }

  .search-input {
    font-size: 14px;
  }

  .icon-badge {
    width: 18px;
    height: 18px;
    font-size: 10px;
  }
}