/* GLOBAL VARIABLES */
:root {
  --primary-blue: #1d4ed8;
  --primary-blue-hover: #1e40af;
  --secondary-blue: #eff6ff;
  --tertiary-blue: #dbeafe;
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-light: #94a3b8;
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --border-color: #e2e8f0;
  --success: #16a34a;
  --danger: #ef4444;
  --warning: #f59e0b;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.05);
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  background-color: var(--bg-main);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--text-main);
  margin: 0;
  -webkit-font-smoothing: antialiased;
}

/* LAYOUT WRAPPER */
.product-page-wrapper {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

/* BREADCRUMBS */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 32px 0 24px;
  font-size: 14px;
  color: var(--text-muted);
}

.breadcrumbs a {
  color: var(--primary-blue);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}

.breadcrumbs a:hover {
  color: var(--primary-blue-hover);
  text-decoration: underline;
}

.breadcrumbs svg {
  color: var(--text-light);
}

.breadcrumbs .active {
  color: var(--text-main);
  font-weight: 600;
}

/* MAIN CONTAINER GRID */
.product-detail-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  background: var(--bg-card);
  padding: 32px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  margin-bottom: 40px;
}

/* IMAGE SECTION */
.image-section {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.image-zoom-container {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  background: var(--secondary-blue);
  overflow: hidden;
  position: relative;
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
}

.main-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.image-zoom-container:hover .main-image {
  transform: scale(1.3);
  cursor: crosshair;
}

/* THUMBNAILS */
.thumbnail-row {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: none;
}
.thumbnail-row::-webkit-scrollbar {
  display: none;
}

.thumbnail {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
  background: var(--bg-card);
  flex-shrink: 0;
}

.thumbnail:hover, .thumbnail.active {
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 4px var(--tertiary-blue);
  transform: translateY(-2px);
}

/* INFO SECTION */
.info-section {
  display: flex;
  flex-direction: column;
}

.product-header {
  margin-bottom: 24px;
}

.title-and-wishlist {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}

.product-title {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.2;
  margin: 0 0 12px 0;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.wishlist-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}

.wishlist-btn:hover {
  background: var(--secondary-blue);
  color: var(--primary-blue);
  border-color: var(--tertiary-blue);
  transform: scale(1.05);
}

.wishlist-btn.active {
  background: var(--secondary-blue);
  color: var(--primary-blue);
  border-color: var(--tertiary-blue);
}

.wishlist-btn.active svg {
  fill: var(--primary-blue);
}

.rating-mini {
  display: flex;
  align-items: center;
  gap: 8px;
}

.stars-mini {
  color: var(--warning);
  display: flex;
  gap: 2px;
}

.review-link-mini {
  font-size: 14px;
  color: var(--primary-blue);
  text-decoration: none;
  font-weight: 500;
}
.review-link-mini:hover {
  text-decoration: underline;
}

/* PRICE & STOCK CARD */
.price-stock-card {
  background: var(--secondary-blue);
  padding: 20px 24px;
  border-radius: var(--radius-md);
  margin-bottom: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid var(--tertiary-blue);
}

.price-wrap {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.sale-price {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary-blue);
}

.regular-price {
  font-size: 18px;
  color: var(--text-light);
  text-decoration: line-through;
  font-weight: 500;
}

.stock-status {
  font-weight: 600;
  font-size: 14px;
}

.in-stock {
  color: var(--success);
  display: flex;
  align-items: center;
  gap: 6px;
  background: #dcfce7;
  padding: 6px 12px;
  border-radius: 20px;
}

.out-of-stock {
  color: var(--danger);
  display: flex;
  align-items: center;
  gap: 6px;
  background: #fee2e2;
  padding: 6px 12px;
  border-radius: 20px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.in-stock .pulse-dot { background: var(--success); }
.out-of-stock .pulse-dot { background: var(--danger); }

.divider {
  height: 1px;
  background: var(--border-color);
  margin: 0 0 24px 0;
}

/* OPTIONS SECTION (Variant & Qty) */
.options-section {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 32px;
}

.option-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.variant-label {
  font-weight: 600;
  font-size: 15px;
  color: var(--text-main);
}

/* Select Styling */
.custom-select-wrapper {
  position: relative;
  width: 100%;
}

.variant-select {
  appearance: none;
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  background: var(--bg-card);
  color: var(--text-main);
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
}

.variant-select:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px var(--tertiary-blue);
}

.select-icon {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--text-muted);
}

/* Quantity Control */
.modern-qty {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  height: 48px;
  width: fit-content;
  overflow: hidden;
  background: var(--bg-card);
}

.qty-btn {
  background: transparent;
  border: none;
  width: 48px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  cursor: pointer;
  transition: var(--transition);
}

.qty-btn:hover {
  background: var(--secondary-blue);
  color: var(--primary-blue);
}

.qty-input {
  width: 50px;
  text-align: center;
  border: none;
  height: 100%;
  font-weight: 600;
  font-size: 16px;
  color: var(--text-main);
appearance: none;         /* Standard */

}
.qty-input::-webkit-outer-spin-button,
.qty-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.qty-input:focus {
  outline: none;
}

/* FEATURES / PERKS */
.perks-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}

.perk-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: var(--text-muted);
  font-weight: 500;
}

.perk-icon {
  background: var(--secondary-blue);
  color: var(--primary-blue);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* BUY BUTTONS */
.product-buttons {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: auto;
}

.btn-primary {
  background: var(--primary-blue);
  color: white;
  border: none;
  padding: 16px;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 10px rgba(29, 78, 216, 0.2);
  width: 100%;
}

.btn-primary:hover {
  background: var(--primary-blue-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(29, 78, 216, 0.3);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--primary-blue);
  border: 2px solid var(--primary-blue);
  padding: 14px;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-secondary:hover {
  background: var(--secondary-blue);
}

/* TABS SECTION */
.product-tabs-container {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  margin-bottom: 60px;
  border: 1px solid var(--border-color);
}

.tabs-header {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-main);
  padding: 0 16px;
}

.tab-btn {
  background: none;
  border: none;
  padding: 20px 32px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 3px solid transparent;
  transition: var(--transition);
}

.tab-btn:hover {
  color: var(--text-main);
}

.tab-btn.active {
  color: var(--primary-blue);
  border-bottom-color: var(--primary-blue);
  background: var(--bg-card);
}

.tabs-content {
  padding: 40px;
}

.tab-pane {
  display: none;
  animation: fadeIn 0.4s ease;
}

.tab-pane.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(5px); }
  to { opacity: 1; transform: translateY(0); }
}

.description-content p {
  line-height: 1.8;
  color: var(--text-muted);
  font-size: 16px;
}

.description-content h3 {
  margin-top: 0;
  font-size: 20px;
  color: var(--text-main);
}

/* REVIEWS TAB STYLING */
.rating-overview {
  display: flex;
  gap: 60px;
  align-items: center;
}

.rating-score-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.score-number {
  font-size: 64px;
  font-weight: 800;
  color: var(--primary-blue);
  line-height: 1;
}

.stars-large {
  color: var(--warning);
  font-size: 24px;
}

.review-count {
  color: var(--text-muted);
  font-size: 15px;
}

.rating-bars {
  flex: 1;
  max-width: 400px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.bar-row {
  display: flex;
  align-items: center;
  gap: 16px;
}

.star-label {
  font-weight: 600;
  color: var(--text-main);
  font-size: 14px;
  width: 50px;
}

.bar-bg {
  flex: 1;
  height: 8px;
  background: var(--bg-main);
  border-radius: 4px;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  background: var(--warning);
  border-radius: 4px;
}

.pct {
  font-size: 14px;
  color: var(--text-muted);
  width: 40px;
  text-align: right;
}

/* SIMILAR PRODUCTS */
.similar-products-section {
  padding-bottom: 40px;
}

.section-title {
  font-size: 28px;
  font-weight: 800;
  margin: 0 0 32px 0;
  color: var(--text-main);
}

.similar-products-wrapper {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 24px;
}

.product-link {
  text-decoration: none;
  color: inherit;
  display: block;
}

.similar-product-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: var(--transition);
  height: 100%;
}

.similar-product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--tertiary-blue);
}

.card-img-wrap {
  aspect-ratio: 1;
  background: var(--secondary-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.card-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform 0.4s ease;
}

.similar-product-card:hover .card-img-wrap img {
  transform: scale(1.1);
}

.card-info {
  padding: 20px;
}

.brand {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary-blue);
  font-weight: 700;
  margin: 0 0 8px 0;
}

.sim-title {
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 12px 0;
  color: var(--text-main);
  line-height: 1.4;
}

.sim-price {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin: 0;
}

/* RESPONSIVE DESIGN */
@media (max-width: 900px) {
  .product-detail-container {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .rating-overview {
    flex-direction: column;
    gap: 32px;
    align-items: flex-start;
  }
}

@media (max-width: 600px) {
  .product-detail-container {
    padding: 20px;
  }
  
  .product-title {
    font-size: 24px;
  }
  
  .image-zoom-container {
    height: auto;
    aspect-ratio: 1;
  }
  
  .tabs-header {
    flex-wrap: wrap;
  }
  
  .tab-btn {
    flex: 1;
    padding: 16px;
    text-align: center;
  }
  
  .tabs-content {
    padding: 24px;
  }
}