/* ==========================================================================
   ShopSphere Modern Modular CSS Architecture
   Designed by Azz Internet Hub - Ultra-Smooth, Fast Loading, Premium Aesthetic
   ========================================================================== */

:root {
  --canvas-bg: #f8fafc;
  --surface-card: #ffffff;
  --brand-solid: #0f172a;
  --brand-accent: #2563eb;
  --brand-accent-hover: #1d4ed8;
  --brand-muted: #64748b;
  --border-subtle: #e2e8f0;
  --accent-alert: #ef4444;
  
  --font-primary: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.04);
  --shadow-elevated: 0 12px 32px rgba(15, 23, 42, 0.08);
  --radius-premium: 16px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: var(--font-primary);
  -webkit-font-smoothing: antialiased;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--canvas-bg);
  color: var(--brand-solid);
  overflow-x: hidden;
}

/* ==========================================================================
   App Header & Branding Layout
   ========================================================================== */

.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0.85rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand-block {
  display: flex;
  align-items: center;
  cursor: pointer;
  user-select: none;
}

.app-logo-img {
  height: 42px;
  width: auto;
  max-width: 180px;
  object-fit: contain;
  transition: var(--transition-smooth);
}

.brand-block:hover .app-logo-img {
  transform: scale(1.02);
}

.brand-text-fallback {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.brand-title {
  font-weight: 800;
  font-size: 1.4rem;
  letter-spacing: -0.5px;
  color: var(--brand-solid);
}

.search-bar-wrapper {
  position: relative;
  flex: 1;
  max-width: 580px;
}

.search-bar-wrapper input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.75rem;
  border-radius: 50px;
  border: 1px solid var(--border-subtle);
  background: #f1f5f9;
  font-size: 0.92rem;
  color: var(--brand-solid);
  transition: var(--transition-smooth);
}

.search-bar-wrapper input:focus {
  outline: none;
  background: #ffffff;
  border-color: var(--brand-accent);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.search-icon {
  position: absolute;
  left: 0.9rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--brand-muted);
  font-size: 1.25rem;
}

.nav-btn {
  background: #f1f5f9;
  border: 1px solid var(--border-subtle);
  color: var(--brand-solid);
  cursor: pointer;
  position: relative;
  padding: 10px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
}

.nav-btn:hover {
  background: #e2e8f0;
  transform: translateY(-1px);
}

.badge-indicator {
  position: absolute;
  top: -4px;
  right: -4px;
  background: var(--brand-accent);
  color: #ffffff;
  font-size: 0.72rem;
  padding: 2px 7px;
  border-radius: 12px;
  font-weight: 700;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.4);
}

/* ==========================================================================
   Hero Stage Banner
   ========================================================================== */

.hero-stage {
  position: relative;
  height: 60vh;
  min-height: 440px;
  background: #0f172a url('https://images.unsplash.com/photo-1441986300917-64674bd600d8') center/cover no-repeat;
  display: flex;
  align-items: center;
  padding: 0 4rem;
  margin-bottom: 3.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.hero-overlay {
  position: absolute;
  top:0; left:0; right:0; bottom:0;
  background: linear-gradient(to right, rgba(15, 23, 42, 0.92) 35%, rgba(15, 23, 42, 0.25));
}

.hero-content {
  position: relative;
  z-index: 2;
  color: #ffffff;
  max-width: 620px;
}

.hero-tagline {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 2.5px;
  font-weight: 700;
  color: #94a3b8;
  display: inline-block;
  margin-bottom: 0.85rem;
}

.hero-headline {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1.2px;
  margin-bottom: 1.2rem;
}

.hero-subtext {
  font-size: 1.05rem;
  color: #cbd5e1;
  margin-bottom: 2.2rem;
  font-weight: 400;
  line-height: 1.5;
}

.cta-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: #ffffff;
  color: var(--brand-solid);
  padding: 1.1rem 2.2rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  transition: var(--transition-smooth);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

.cta-action-btn:hover {
  transform: translateY(-2px);
  background: #f8fafc;
  box-shadow: 0 8px 25px rgba(0,0,0,0.2);
}

/* ==========================================================================
   Section Layouts & Grid Setup
   ========================================================================== */

.section-container {
  max-width: 1400px;
  margin: 0 auto 4.5rem auto;
  padding: 0 2rem;
}

.section-header-flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.75rem;
}

.section-title {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.6px;
  color: var(--brand-solid);
}

.category-reset-btn {
  background: #eff6ff;
  color: var(--brand-accent);
  border: 1px solid #bfdbfe;
  padding: 0.5rem 1rem;
  border-radius: 30px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.category-reset-btn:hover {
  background: #dbeafe;
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.25rem;
}

.category-luxury-card {
  position: relative;
  height: 220px;
  border-radius: var(--radius-premium);
  overflow: hidden;
  cursor: pointer;
  background: #e2e8f0;
  border: 1px solid var(--border-subtle);
  transition: var(--transition-smooth);
}

.category-luxury-card.active-cat {
  border: 2px solid var(--brand-accent);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.15);
}

.category-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.category-luxury-card:hover .category-card-img {
  transform: scale(1.06);
}

.category-card-info {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 1.25rem 1rem 1rem 1rem;
  background: linear-gradient(to top, rgba(15, 23, 42, 0.85), transparent);
  color: #ffffff;
}

.category-card-info h4 {
  font-size: 1.05rem;
  font-weight: 700;
}

/* Products Grid */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 1.5rem;
  padding: 0.5rem 0;
}

.product-showcase-card {
  background: var(--surface-card);
  border-radius: var(--radius-premium);
  overflow: hidden;
  box-shadow: var(--shadow-subtle);
  border: 1px solid var(--border-subtle);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
}

.product-showcase-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-elevated);
  border-color: #cbd5e1;
}

.card-media-frame {
  position: relative;
  padding-top: 100%;
  background: #f1f5f9;
  overflow: hidden;
  cursor: pointer;
}

.card-media-frame img {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.3s ease-in-out, transform 0.4s ease;
}

.card-media-frame img.loaded {
  opacity: 1;
}

.product-showcase-card:hover .card-media-frame img {
  transform: scale(1.04);
}

.card-details-panel {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.item-badge-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.vendor-card-tag {
  background: #f1f5f9;
  color: var(--brand-muted);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.vendor-card-tag.official-tag {
  background: #ecfdf5;
  color: #059669;
}

.item-title-txt {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--brand-solid);
  margin-bottom: 0.75rem;
  line-height: 1.35;
}

.price-matrix-line {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.sale-price-bold {
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--brand-solid);
}

.retail-price-slashed {
  text-decoration: line-through;
  color: var(--brand-muted);
  font-size: 0.88rem;
}

/* Flat Skeleton Loading */
.skeleton-card {
  background: #ffffff;
  border-radius: var(--radius-premium);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border-subtle);
}

.skeleton-media {
  width: 100%;
  padding-top: 100%;
  background: #f1f5f9;
  position: relative;
  overflow: hidden;
}

.skeleton-text {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.skeleton-line {
  height: 14px;
  background: #f1f5f9;
  border-radius: 4px;
  width: 100%;
  position: relative;
  overflow: hidden;
}

.skeleton-line.short {
  width: 40%;
  height: 18px;
}

.skeleton-media::after, .skeleton-line::after {
  content: "";
  position: absolute;
  top: 0; left: -150%; width: 150%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.7), transparent);
  animation: skeleton-sweep 1.5s infinite ease-in-out;
}

@keyframes skeleton-sweep {
  0% { left: -150%; }
  100% { left: 150%; }
}

/* ==========================================================================
   Modals & Lightbox Components
   ========================================================================== */

.drawer-backdrop, .modal-backdrop {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  justify-content: flex-end;
  transition: var(--transition-smooth);
}

.modal-backdrop {
  justify-content: center;
  align-items: center;
  padding: 1.5rem;
}

.modal-window {
  background: #ffffff;
  border-radius: var(--radius-premium);
  width: 100%;
  max-width: 950px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  padding: 2.5rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.modal-close-btn {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: #f1f5f9;
  border: none;
  border-radius: 50%;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-smooth);
  color: var(--brand-solid);
  z-index: 10;
}

.modal-close-btn:hover {
  background: #e2e8f0;
  transform: rotate(90deg);
}

.product-viewer-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}

.gallery-composite-stage {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.hero-viewscreen {
  position: relative;
  padding-top: 100%;
  border-radius: 12px;
  overflow: hidden;
  background: #f8fafc;
  border: 1px solid var(--border-subtle);
  cursor: pointer;
}

.hero-viewscreen img {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  object-fit: contain;
  padding: 0.5rem;
  transition: transform 0.3s ease;
}

.expand-badge {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(15, 23, 42, 0.75);
  color: #ffffff;
  padding: 6px 12px;
  border-radius: 30px;
  font-size: 0.75rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
  backdrop-filter: blur(4px);
  pointer-events: none;
}

.gallery-counter-tag {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(15, 23, 42, 0.75);
  color: #ffffff;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  pointer-events: none;
}

.thumbnails-strip {
  display: flex;
  gap: 0.6rem;
  overflow-x: auto;
  padding-bottom: 4px;
}

.thumb-frame-item {
  width: 68px;
  height: 68px;
  border-radius: 8px;
  object-fit: cover;
  border: 2px solid transparent;
  cursor: pointer;
  background: #f1f5f9;
  transition: var(--transition-smooth);
}

.thumb-frame-item.active-thumb {
  border-color: var(--brand-accent);
}

/* Fullscreen Image Preview Lightbox */
.image-fullscreen-backdrop {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(12px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.fullscreen-close-btn {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: rgba(255, 255, 255, 0.15);
  border: none;
  color: #ffffff;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.fullscreen-close-btn:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.08);
}

.fullscreen-img-stage {
  max-width: 90vw;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.fullscreen-img-stage img {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.5);
}

.fullscreen-hint {
  color: #94a3b8;
  font-size: 0.82rem;
}

/* ==========================================================================
   Selection Drawer Engine & Return Button
   ========================================================================== */

.drawer-panel {
  position: fixed;
  right: 0;
  top: 0;
  height: 100vh;
  width: 100%;
  max-width: 460px;
  background: #ffffff;
  display: flex;
  flex-direction: column;
  z-index: 1000;
  box-shadow: -15px 0 50px rgba(0, 0, 0, 0.1);
  border-left: 1px solid var(--border-subtle);
}

.drawer-header {
  padding: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-subtle);
  flex-shrink: 0;
  background: #ffffff;
}

.header-title-block h4 {
  font-weight: 800;
  font-size: 1.3rem;
  letter-spacing: -0.4px;
  color: var(--brand-solid);
}

.drawer-subtitle {
  font-size: 0.8rem;
  color: var(--brand-muted);
  margin-top: 0.1rem;
}

/* High Visibility Return Button */
.close-txt-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: #eff6ff;
  color: var(--brand-accent);
  border: 1px solid #bfdbfe;
  padding: 0.55rem 1.1rem;
  border-radius: 30px;
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.close-txt-btn:hover {
  background: #dbeafe;
  color: var(--brand-accent-hover);
  transform: translateX(-3px);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.15);
}

.drawer-scrollable {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  -webkit-overflow-scrolling: touch;
}

.cart-item-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  background: #f8fafc;
  border-radius: 12px;
  border: 1px solid var(--border-subtle);
  transition: var(--transition-smooth);
}

.cart-item-row:hover {
  border-color: #cbd5e1;
  background: #f1f5f9;
}

.cart-row-details h6 {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--brand-solid);
  margin-bottom: 0.2rem;
}

.cart-row-details p {
  font-size: 0.8rem;
  color: var(--brand-muted);
}

.cart-qty-controls {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: #ffffff;
  padding: 0.2rem 0.4rem;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
}

.qty-stepper-btn {
  background: none;
  border: none;
  color: var(--brand-solid);
  cursor: pointer;
  padding: 0.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  transition: background 0.2s;
}

.qty-stepper-btn:hover {
  background: #f1f5f9;
}

.cart-qty-value {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--brand-solid);
  min-width: 18px;
  text-align: center;
}

.cart-purge-icon-btn {
  background: none;
  border: none;
  color: var(--accent-alert);
  cursor: pointer;
  padding: 0.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  transition: background 0.2s;
}

.cart-purge-icon-btn:hover {
  background: #fef2f2;
}

/* Checkout Form Container */
.checkout-form-box {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  margin-top: 0.5rem;
}

.form-section-title {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--brand-solid);
  letter-spacing: -0.2px;
  margin-bottom: 0.2rem;
  border-left: 3px solid var(--brand-accent);
  padding-left: 8px;
}

.input-field-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.field-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: #475569;
}

.checkout-form-box input, 
.checkout-form-box select, 
.checkout-form-box textarea {
  width: 100% !important;
  border: 1px solid var(--border-subtle) !important;
  background: #ffffff !important;
  border-radius: 10px !important;
  padding: 0.8rem 1rem !important;
  font-size: 0.9rem !important;
  color: var(--brand-solid) !important;
  transition: var(--transition-smooth) !important;
}

.checkout-form-box input:focus, 
.checkout-form-box select:focus, 
.checkout-form-box textarea:focus {
  outline: none !important;
  border-color: var(--brand-accent) !important;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1) !important;
}

.vendor-routing-alert {
  background: #fffbebfb;
  border: 1px solid #fde68a;
  color: #b45309;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 12px;
  line-height: 1.4;
  margin-bottom: 1rem;
  display: flex;
  align-items: flex-start;
  gap: 6px;
}

.drawer-footer {
  padding: 1.5rem;
  border-top: 1px solid var(--border-subtle);
  background: #ffffff;
  flex-shrink: 0;
}

.billing-summary-matrix {
  margin-bottom: 1.25rem;
}

.summary-line {
  display: flex;
  justify-content: space-between;
  font-size: 0.88rem;
  color: var(--brand-muted);
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.summary-line.high-emphasis {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--brand-solid);
  margin-top: 0.75rem;
}

.divider-line {
  border: 0;
  height: 1px;
  background: var(--border-subtle);
  margin: 0.75rem 0;
}

.primary-pay-btn {
  width: 100% !important;
  background: var(--brand-solid) !important;
  color: #ffffff !important;
  border: none !important;
  padding: 1.1rem !important;
  border-radius: 12px !important;
  font-size: 0.98rem !important;
  font-weight: 700 !important;
  letter-spacing: 0.5px !important;
  cursor: pointer !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  gap: 0.5rem !important;
  transition: var(--transition-smooth) !important;
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.15) !important;
}

.primary-pay-btn:hover {
  background: #1e293b !important;
  transform: translateY(-2px) !important;
  box-shadow: 0 6px 20px rgba(15, 23, 42, 0.25) !important;
}

.primary-pay-btn:active {
  transform: scale(0.98) !important;
}

.secure-badge-icon {
  font-size: 1.15rem !important;
  color: #94a3b8;
}

/* Hidden Utility */
.hidden {
  display: none !important;
}

/* ==========================================================================
   Footer Layout
   ========================================================================== */

.premium-footer {
  background: var(--brand-solid);
  color: #cbd5e1;
  text-align: center;
  padding: 3.5rem 2rem;
  font-size: 0.9rem;
  margin-top: 5rem;
}

.footer-content {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.footer-logo-img {
  height: 36px;
  width: auto;
  opacity: 0.9;
  filter: brightness(0) invert(1);
}

.copyright-text {
  font-size: 0.8rem;
  color: #64748b;
}

/* ==========================================================================
   Responsive Adaptability
   ========================================================================== */

@media (max-width: 992px) {
  .product-viewer-layout {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .hero-headline {
    font-size: 2.4rem;
  }
  .modal-window {
    padding: 1.75rem;
  }
}

@media (max-width: 640px) {
  .header-container {
    flex-wrap: wrap;
    padding: 0.75rem 1rem;
  }
  .search-bar-wrapper {
    order: 3;
    max-width: 100%;
  }
  .hero-stage {
    padding: 0 1.5rem;
    height: 50vh;
  }
  .hero-headline {
    font-size: 2rem;
  }
  .products-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 0.85rem !important;
  }
  .card-media-frame {
    padding-top: 90% !important;
  }
  .item-title-txt {
    font-size: 0.88rem !important;
    line-height: 1.25 !important;
  }
  .sale-price-bold {
    font-size: 1rem !important;
  }
}