/* ==========================================================================
   ShopSphere - Responsive Media Queries (responsive.css)
   Ensures flawless presentation across Desktop, Tablet & Mobile devices
   ========================================================================== */

/* Mobile Drawer Navigation */
.mobile-nav-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

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

.mobile-nav-drawer {
  position: fixed;
  top: 0;
  left: 0;
  width: 300px;
  max-width: 85%;
  height: 100%;
  background-color: var(--bg-surface-elevated);
  z-index: 1001;
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
  transform: translateX(-100%);
  transition: transform var(--transition-smooth);
  overflow-y: auto;
}

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

.mobile-drawer-header {
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-light);
}

.mobile-drawer-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  flex: 1;
}

.mobile-nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mobile-nav-links a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-weight: 600;
  color: var(--text-main);
  transition: all var(--transition-fast);
}

.mobile-nav-links a:hover,
.mobile-nav-links a.active {
  background-color: var(--primary-blue-subtle);
  color: var(--primary-blue);
}

.mobile-drawer-footer {
  padding: 20px;
  border-top: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ==========================================================================
   Tablet & Medium Desktops (max-width: 1024px)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 2.8rem;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .categories-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .products-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .shop-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .shop-layout {
    grid-template-columns: 240px 1fr;
    gap: 24px;
  }

  .footer-top-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .stats-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .admin-sidebar {
    width: 220px;
  }

  .admin-main {
    margin-left: 220px;
  }
}

/* ==========================================================================
   Tablets & Mobile Landscape (max-width: 768px)
   ========================================================================== */
@media (max-width: 768px) {
  /* Navigation */
  .nav-links,
  .nav-search-wrap {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  /* Hero Section */
  .hero-section {
    padding: 50px 0 70px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .hero-title {
    font-size: 2.3rem;
  }

  .hero-image-card img {
    height: 340px;
  }

  .hero-stats-row {
    gap: 20px;
  }

  /* Categories & Features */
  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .features-strip {
    margin-top: -20px;
    margin-bottom: 50px;
  }

  .features-grid {
    grid-template-columns: 1fr;
    padding: 20px;
  }

  /* Promo Banner */
  .promo-banner {
    grid-template-columns: 1fr;
    padding: 36px 24px;
  }

  .promo-title {
    font-size: 2rem;
  }

  /* Testimonials */
  .testimonials-grid {
    grid-template-columns: 1fr;
  }

  /* Shop Layout (Filters & Grid) */
  .shop-layout {
    grid-template-columns: 1fr;
  }

  .shop-sidebar {
    position: static;
  }

  .shop-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Product Details */
  .product-showcase-grid {
    grid-template-columns: 1fr;
    padding: 24px;
    gap: 32px;
  }

  .detail-product-title {
    font-size: 1.7rem;
  }

  .product-perks-list {
    grid-template-columns: 1fr;
  }

  .tabs-nav-header {
    gap: 16px;
  }

  /* Cart & Checkout */
  .cart-layout {
    grid-template-columns: 1fr;
  }

  .cart-header-row {
    display: none;
  }

  .cart-item {
    grid-template-columns: 80px 1fr;
    gap: 12px;
    position: relative;
    padding: 16px 0;
  }

  .cart-item-price {
    display: none;
  }

  .cart-item-price-mobile {
    display: block;
  }

  .cart-item-quantity {
    grid-column: 2;
  }

  .cart-item-total {
    grid-column: 2;
    text-align: right;
  }

  .cart-item-action {
    position: absolute;
    top: 14px;
    right: 0;
  }

  .checkout-layout {
    grid-template-columns: 1fr;
  }

  .form-grid-2,
  .form-grid-3 {
    grid-template-columns: 1fr;
  }

  .payment-methods-grid {
    grid-template-columns: 1fr;
  }

  .order-quick-info {
    grid-template-columns: repeat(2, 1fr);
  }

  .modal-grid-row {
    grid-template-columns: 1fr;
  }

  /* Admin */
  .admin-sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
  }

  .admin-sidebar.open {
    transform: translateX(0);
  }

  .admin-main {
    margin-left: 0;
  }

  .stats-cards-grid {
    grid-template-columns: 1fr;
  }

  .prod-form-grid {
    grid-template-columns: 1fr;
  }

  .prod-form-grid .full-span {
    grid-column: span 1;
  }

  .admin-category-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   Small Mobile Phones (max-width: 576px)
   ========================================================================== */
@media (max-width: 576px) {
  .hero-title {
    font-size: 2rem;
  }

  .categories-grid {
    grid-template-columns: 1fr;
  }

  .products-grid-4,
  .shop-grid {
    grid-template-columns: 1fr;
  }

  .auth-card {
    padding: 24px 18px;
  }

  .confirmation-card {
    padding: 24px 16px;
  }

  .order-quick-info {
    grid-template-columns: 1fr;
  }

  .footer-top-grid {
    grid-template-columns: 1fr;
  }

  .catalog-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .sort-select {
    width: 100%;
  }

  .buttons-group-row {
    flex-direction: column;
  }

  .btn-detail-wishlist {
    width: 100%;
    text-align: center;
  }
}