/* =====================
   BUTTONS
===================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  white-space: nowrap;
  cursor: pointer;
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-primary);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-accent {
  background: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
}

.btn-accent:hover {
  background: var(--color-accent-light);
  transform: translateY(-1px);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-base);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-xs);
}

/* =====================
   BADGES
===================== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: 999px;
  letter-spacing: 0.04em;
}

.badge-primary {
  background: rgba(26, 58, 107, 0.1);
  color: var(--color-primary);
}

.badge-accent {
  background: rgba(90, 158, 47, 0.1);
  color: var(--color-accent);
}

.badge-fda {
  background: #003087;
  color: #fff;
}

.badge-ce {
  background: #0055a4;
  color: #fff;
}

/* =====================
   PRODUCT GALLERY
===================== */
.product-gallery {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: var(--space-4);
  align-items: start;
}

.product-gallery--solo {
  grid-template-columns: 1fr;
}

.product-image-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 200px;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  background: var(--color-bg-section);
}

.gallery-thumbs {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.gallery-thumb {
  width: 72px;
  height: 72px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  transition: border-color var(--transition);
  background: var(--color-bg);
  flex-shrink: 0;
}

.gallery-thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 4px;
}

.gallery-thumb.thumb-scale-70 img {
  transform: scale(0.7);
  transform-origin: center;
}

/* fibula2 특정 썸네일만 축소 */
.gallery-thumb img[src*="fibula2/1115.png"],
.gallery-thumb img[src*="fibula2/3001.png"],
.gallery-thumb img[src*="fibula2/3002.png"],
.gallery-thumb img[src*="fibula2/3003.png"],
.gallery-thumb img[src*="bk-pes-valgus-plate/Pes-Screw.png"] {
  transform: scale(0.7);
  transform-origin: center;
}

.gallery-thumb:hover,
.gallery-thumb.active {
  border-color: var(--color-primary);
}

.gallery-main {
  position: relative;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 1 / 1;
  /* flex + 자식 height:100% 조합은 Safari(WebKit)에서 패딩을 무시하고 꽉 차는 경우가 있어 grid 사용 */
  display: grid;
  grid-template-rows: minmax(0, 1fr);
  grid-template-columns: minmax(0, 1fr);
  align-items: stretch;
  justify-items: stretch;
  box-sizing: border-box;
  padding: var(--space-8);
}

.gallery-main-frame {
  width: 100%;
  height: 100%;
  min-width: 0;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.gallery-main-frame img {
  display: block;
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 100%;
  min-width: 0;
  min-height: 0;
  object-fit: contain;
  object-position: center;
  transition: opacity 0.2s;
}

.gallery-main-frame img.main-scale-70 {
  transform: scale(0.7);
  transform-origin: center;
}

/* fibula2 특정 메인 이미지도 축소 */
.gallery-main-frame img[src*="fibula2/1115.png"],
.gallery-main-frame img[src*="fibula2/3001.png"],
.gallery-main-frame img[src*="fibula2/3002.png"],
.gallery-main-frame img[src*="fibula2/3003.png"],
.gallery-main-frame img[src*="bk-pes-valgus-plate/Pes-Screw.png"] {
  transform: scale(0.7);
  transform-origin: center;
}

/* mini-extor-pxl 특정 메인 이미지만 확대 */
.gallery-main-frame img[src*="mini-extor-pxl/003.gif"] {
  transform: scale(1.5);
  transform-origin: center;
}

/* =====================
   3D VIEWER
===================== */
.viewer-3d-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  /* 가운데가 살짝 밝은 스튜디오형 비네팅 (캔버스 투명 클리어와 맞춤) */
  --viewer-bg-spot: radial-gradient(ellipse 95% 88% at 50% 46%,
      #3d4450 0%,
      #2a303c 28%,
      #1a1f28 55%,
      #12151c 78%,
      #08090c 100%);
  background: var(--viewer-bg-spot);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.viewer-3d-wrap canvas {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
}

.viewer-3d-hud {
  position: absolute;
  bottom: var(--space-4);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--space-2);
  pointer-events: none;
}

.viewer-hint {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(6px);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.viewer-loading {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  color: rgba(255, 255, 255, 0.72);
  font-size: var(--font-size-sm);
  background: var(--viewer-bg-spot);
  z-index: 2;
  transition: opacity 0.4s;
}

.viewer-loading.hidden {
  opacity: 0;
  pointer-events: none;
}

.viewer-spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* =====================
   SPEC TABLE
===================== */
.spec-table {
  width: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.spec-table thead {
  background: var(--color-primary);
  color: var(--color-white);
}

.spec-table th {
  padding: var(--space-3) var(--space-5);
  text-align: left;
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.spec-table td {
  padding: var(--space-3) var(--space-5);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border);
}

.spec-table tbody tr:last-child td {
  border-bottom: none;
}

.spec-table tbody tr:nth-child(even) {
  background: var(--color-bg);
}

/* =====================
   INFO CARD
===================== */
.info-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
}

.info-card-icon {
  width: 48px;
  height: 48px;
  background: rgba(26, 58, 107, 0.08);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.info-card h3 {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.info-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* =====================
   TABS
===================== */
.tabs-nav {
  display: flex;
  border-bottom: 2px solid var(--color-border);
  gap: 0;
  margin-bottom: var(--space-6);
}

.tab-btn {
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all var(--transition);
  cursor: pointer;
}

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

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

.tab-content {
  display: none;
}

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

/* =====================
   RELATED PRODUCTS
===================== */
.product-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}

.product-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.product-card-image {
  aspect-ratio: 1 / 1;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  overflow: hidden;
}

.product-card-image img {
  max-height: 140px;
  object-fit: contain;
}

.product-card-body {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border);
}

.product-card-category {
  font-size: var(--font-size-xs);
  color: var(--color-accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-1);
}

.product-card-name {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.4;
  white-space: pre-line;
}

/* =====================
   STICKY SIDEBAR CTA
===================== */
.sticky-cta {
  position: sticky;
  top: calc(var(--header-height) + var(--space-6));
}

.cta-box {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
}

.cta-box h3 {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.cta-box p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-5);
  line-height: 1.6;
}

.cta-box .btn {
  width: 100%;
  justify-content: center;
  margin-bottom: var(--space-3);
}

.cta-divider {
  text-align: center;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin: var(--space-3) 0;
  position: relative;
}

.cta-divider::before,
.cta-divider::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 35%;
  height: 1px;
  background: var(--color-border);
}

.cta-divider::before {
  left: 0;
}

.cta-divider::after {
  right: 0;
}

/* =====================
   DOWNLOAD BOX
===================== */
.download-box {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.download-box:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.download-icon {
  width: 44px;
  height: 44px;
  background: rgba(26, 58, 107, 0.08);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
}

.download-info {
  flex: 1;
  min-width: 0;
}

.download-name {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.download-meta {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: 2px;
}

/* =====================
   RESPONSIVE
===================== */
@media (max-width: 768px) {
  .product-gallery {
    grid-template-columns: 1fr;
  }

  .gallery-thumbs {
    flex-direction: row;
    flex-wrap: wrap;
    order: 2;
    margin-top: var(--space-3);
  }

  .gallery-main {
    order: 1;
    aspect-ratio: 4 / 3;
  }

  .gallery-thumb {
    width: 60px;
    height: 60px;
  }
}