/* ── Product Detail Page ─────────────────────────────────────── */
.product-layout {
  display: grid;
  grid-template-columns: 1fr 440px;
  gap: var(--space-12);
  padding-block: var(--space-8);
  align-items: start;
}

/* 3D Viewer */
.viewer-wrap {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-6));
}

.viewer-canvas-wrap {
  width: 100%;
  aspect-ratio: 1 / 1;
  background: linear-gradient(145deg, var(--color-secondary) 0%, #1e3a6e 100%);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  position: relative;
  border: 1px solid rgba(255,255,255,.08);
}

#viewer-canvas {
  position: absolute;
  inset: 0;
  width: 100% !important;
  height: 100% !important;
}

.viewer-controls {
  position: absolute;
  bottom: var(--space-4);
  right: var(--space-4);
  display: flex;
  gap: var(--space-2);
}

.viewer-ctrl-btn {
  width: 36px;
  height: 36px;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: 14px;
  cursor: pointer;
  transition: all var(--transition-fast);
  backdrop-filter: blur(4px);
}
.viewer-ctrl-btn:hover { background: rgba(255,153,0,.25); border-color: var(--color-primary); }

.viewer-loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(19,38,72,.6);
  backdrop-filter: blur(4px);
}

.viewer-hint {
  position: absolute;
  bottom: var(--space-4);
  left: var(--space-4);
  font-size: var(--text-xs);
  color: rgba(255,255,255,.4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* Material color selector */
.viewer-material-bar {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-3);
  flex-wrap: wrap;
}

.material-swatch {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.material-swatch:hover,
.material-swatch.active {
  border-color: var(--color-primary);
  transform: scale(1.15);
}

/* Product info panel */
.product-info { }

.product-category-link {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-primary);
  font-weight: var(--font-semibold);
}

.product-title {
  font-size: var(--text-3xl);
  font-weight: var(--font-extrabold);
  color: var(--color-secondary);
  margin-block: var(--space-3) var(--space-5);
  line-height: var(--leading-tight);
}

.product-price-block {
  background: var(--color-gray-50);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  margin-bottom: var(--space-6);
}

.product-price-main {
  font-size: var(--text-4xl);
  font-weight: var(--font-extrabold);
  color: var(--color-secondary);
}

.product-price-vat {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  margin-top: var(--space-1);
}

.price-breakdown {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-gray-200);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.price-line {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-xs);
  color: var(--color-gray-500);
}

/* Option sections */
.option-section {
  margin-bottom: var(--space-6);
}

.option-label {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-secondary);
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.option-value {
  font-weight: var(--font-normal);
  color: var(--color-primary);
}

/* Material tabs (product page) */
.product-material-tabs {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.product-material-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: var(--space-3) var(--space-4);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  background: var(--color-white);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-width: 90px;
  text-align: center;
}

.product-material-tab:hover {
  border-color: var(--color-primary);
}

.product-material-tab.active {
  border-color: var(--color-primary);
  background: var(--color-primary-pale);
}

.pmt-name {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-secondary);
}

.pmt-price {
  font-size: 10px;
  color: var(--color-primary);
}

/* Color grid (product page) */
.product-color-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.product-color-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  background: var(--color-white);
  width: 76px;
}

.product-color-card:hover { border-color: var(--color-primary); }

.product-color-card.active {
  border-color: var(--color-primary);
  background: var(--color-primary-pale);
}

.product-color-card img {
  width: 48px;
  height: 48px;
  object-fit: cover;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-gray-100);
  display: block;
}

.product-color-card-name {
  font-size: 10px;
  font-weight: var(--font-medium);
  color: var(--color-secondary);
  text-align: center;
  line-height: 1.2;
}

.product-color-card-price {
  font-size: 9px;
  color: var(--color-primary);
}

/* Scale slider */
.scale-value-display {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  text-align: center;
  margin-top: var(--space-2);
}

/* Quantity */
.qty-control {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1.5px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  width: fit-content;
}

.qty-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xl);
  color: var(--color-gray-500);
  background: var(--color-gray-50);
  transition: all var(--transition-fast);
  cursor: pointer;
}
.qty-btn:hover { background: var(--color-gray-100); color: var(--color-secondary); }

.qty-input {
  width: 56px;
  height: 40px;
  border: none;
  border-inline: 1.5px solid var(--color-gray-200);
  text-align: center;
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-secondary);
  outline: none;
}

/* ── Engraving add-on ────────────────────────────────────────── */

.engraving-section {
  border: 1.5px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: var(--space-6);
  transition: border-color var(--transition-fast);
}

.engraving-section:has(#engraving-checkbox:checked) {
  border-color: var(--color-primary);
}

.engraving-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  cursor: pointer;
  user-select: none;
  background: var(--color-white);
  gap: var(--space-4);
}

.engraving-toggle:hover {
  background: var(--color-gray-50);
}

.engraving-toggle-left {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.engraving-toggle-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-lg);
  background: var(--color-primary-pale);
  color: var(--color-primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.engraving-toggle-title {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-secondary);
  line-height: 1.3;
}

.engraving-toggle-sub {
  display: block;
  font-size: var(--text-xs);
  color: var(--color-gray-400);
  margin-top: 1px;
}

.engraving-toggle-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.engraving-price-badge {
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  color: var(--color-primary-dark);
  background: var(--color-primary-pale);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

/* Toggle switch */
.engraving-switch {
  position: relative;
  display: flex;
  align-items: center;
}

.engraving-switch input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.engraving-switch-track {
  width: 40px;
  height: 22px;
  background: var(--color-gray-200);
  border-radius: var(--radius-full);
  transition: background var(--transition-fast);
  display: flex;
  align-items: center;
  padding: 2px;
}

.engraving-switch input:checked ~ .engraving-switch-track {
  background: var(--color-primary);
}

.engraving-switch-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-white);
  box-shadow: 0 1px 3px rgba(0,0,0,.2);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.engraving-switch input:checked ~ .engraving-switch-track .engraving-switch-thumb {
  transform: translateX(18px);
}

/* Expanded fields */
.engraving-fields {
  padding: var(--space-4) var(--space-5) var(--space-5);
  border-top: 1px solid var(--color-gray-100);
  background: var(--color-gray-50);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.engraving-fields[hidden] { display: none; }

.engraving-char-count {
  float: right;
  font-size: 11px;
  font-weight: var(--font-normal);
  color: var(--color-gray-400);
}

/* Add to cart */
.add-to-cart-section {
  position: sticky;
  bottom: var(--space-6);
}

.add-to-cart-section .btn-primary {
  width: 100%;
  padding: var(--space-5);
  font-size: var(--text-base);
  border-radius: var(--radius-xl);
}

/* Right of withdrawal notice */
.withdrawal-notice {
  margin-top: var(--space-4);
  padding: var(--space-3) var(--space-4);
  background: var(--color-info-bg);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  color: #1e40af;
  line-height: var(--leading-relaxed);
}

/* ── Media tab panel (image + 3D viewer) ─────────────────────── */
.media-tabs {
  display: flex;
  gap: 2px;
  background: var(--color-gray-100);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  padding: 4px;
  margin-bottom: -1px;
}

.media-tab-btn {
  flex: 1;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-gray-500);
  border-radius: var(--radius-md);
  background: transparent;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.media-tab-btn:hover {
  color: var(--color-secondary);
  background: rgba(255,255,255,.6);
}

.media-tab-btn.active {
  color: var(--color-secondary);
  background: var(--color-white);
  box-shadow: 0 1px 4px rgba(0,0,0,.1);
}

.tab-panel { display: none; }
.tab-panel--active { display: block; }

.product-image-wrap {
  width: 100%;
  aspect-ratio: 1 / 1;
  background: var(--color-gray-50);
  border-radius: 0 0 var(--radius-2xl) var(--radius-2xl);
  overflow: hidden;
  border: 1px solid var(--color-gray-100);
}

.product-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

@media (max-width: 1024px) {
  .product-layout { grid-template-columns: 1fr; }
  .viewer-wrap { position: static; }
}