/* ✨ Simple Image Gallery - E-commerce Unified Design */

/* Motion Design System Tokens - Unified with All Product Reviews */
:root {
  /* Duration Tokens - E-commerce Optimized */
  --duration-fast: 150ms;
  --duration-medium: 300ms;
  --duration-slow: 500ms;

  /* Easing Tokens */
  --easing-standard: ease-out;
  --easing-exit: ease-in;
  --easing-in-out: ease-in-out;

  /* Trust & Conversion Focused Colors */
  --color-primary: #2563eb;
  --color-shadow-subtle: rgba(0, 0, 0, 0.04);
  --color-shadow-hover: rgba(0, 0, 0, 0.08);
  --color-overlay: rgba(0, 0, 0, 0.3);
  --color-overlay-icon: rgba(255, 255, 255, 0.9);
}

.sig-gallery-container {
  width: 100%;
  max-width: 100%;
  margin: 0 auto;
  padding: 0;
  /* 🛒 E-commerce: Ensure gallery doesn't dominate */
  opacity: 0.98;
}

.sig-gallery-grid {
  display: grid;
  gap: 15px;
  margin-bottom: 30px;
  grid-template-columns: repeat(var(--sig-columns), 1fr);
}

/* 반응형 그리드 설정 */
.sig-gallery-container[data-columns-desktop="4"] .sig-gallery-grid {
  --sig-columns: 4;
}

.sig-gallery-container[data-columns-desktop="3"] .sig-gallery-grid {
  --sig-columns: 3;
}

.sig-gallery-container[data-columns-desktop="2"] .sig-gallery-grid {
  --sig-columns: 2;
}

/* 태블릿 반응형 */
@media (max-width: 1024px) {
  .sig-gallery-container[data-columns-tablet="3"] .sig-gallery-grid {
    --sig-columns: 3;
  }

  .sig-gallery-container[data-columns-tablet="2"] .sig-gallery-grid {
    --sig-columns: 2;
  }

  .sig-gallery-container[data-columns-tablet="1"] .sig-gallery-grid {
    --sig-columns: 1;
  }
}

/* 모바일 반응형 */
@media (max-width: 768px) {
  .sig-gallery-container[data-columns-mobile="2"] .sig-gallery-grid {
    --sig-columns: 2;
  }

  .sig-gallery-container[data-columns-mobile="1"] .sig-gallery-grid {
    --sig-columns: 1;
  }

  .sig-gallery-grid {
    gap: 10px;
  }
}

/* 🎯 E-commerce Optimized Gallery Item */
.sig-gallery-item {
  position: relative;
  overflow: hidden;
  background: #ffffff;
  cursor: pointer;
  border-radius: 6px;

  /* 🛍️ Subtle transitions - no distraction */
  transition: transform var(--duration-fast) var(--easing-standard),
    box-shadow var(--duration-fast) var(--easing-standard);
  will-change: transform;

  /* CLS 방지를 위해 최소 높이 보장 */
  min-height: 120px;

  /* 🔧 Unified with All Product Reviews - subtle shadow */
  box-shadow: 0 1px 3px var(--color-shadow-subtle);
}

/* ✨ Subtle Trust-building Hover - Unified Style */
.sig-gallery-item:hover {
  transform: translateY(-1px); /* 🔧 Reduced from 4px to 1px */
  box-shadow: 0 4px 12px var(--color-shadow-hover);
}

.sig-image-wrapper {
  position: relative;
  width: 100%;
  height: 0;
  padding-bottom: 75%; /* 4:3 비율 (3/4 = 0.75) */
  overflow: hidden;
}

/* 🎭 Optimized Skeleton UI */
@keyframes sig-skeleton {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

.sig-lazy-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity var(--duration-medium) var(--easing-standard);
  will-change: opacity;
  opacity: 0;
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: sig-skeleton 1.5s infinite;
}

.sig-lazy-image.loaded {
  opacity: 1;
  background: none;
  animation: none;
}

.sig-lazy-image.loading {
  opacity: 0.5;
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: sig-skeleton 1.5s infinite;
}

.sig-lazy-image.error {
  opacity: 1;
  background: #f5f5f5
    url('data:image/svg+xml;charset=UTF-8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="%23cccccc" stroke-width="1" stroke-linecap="round" stroke-linejoin="round"><rect x="3" y="3" width="18" height="18" rx="2" ry="2"/><circle cx="8.5" cy="8.5" r="1.5"/><polyline points="21,15 16,10 5,21"/></svg>')
    center/40px no-repeat;
  animation: none;
}

/* 🔍 Subtle Image Overlay - E-commerce Optimized */
.sig-image-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--duration-fast) var(--easing-standard);
  will-change: opacity;
}

.sig-gallery-item:hover .sig-image-overlay {
  opacity: 1;
}

.sig-zoom-icon {
  font-size: 20px; /* 🔧 Reduced from 24px */
  color: var(--color-overlay-icon);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
  transform: scale(0.9); /* 🔧 Less dramatic scale */
  transition: transform var(--duration-fast) var(--easing-standard);
  will-change: transform;
}

.sig-gallery-item:hover .sig-zoom-icon {
  transform: scale(1);
}

/* 🔄 Professional Load More Button - Unified with All Product Reviews */
.sig-load-more-wrapper {
  text-align: center;
  margin-top: 24px; /* 🔧 Reduced from 30px */
}

.sig-load-more-btn {
  background: transparent;
  color: #4f46e5;
  border: 2px solid #4f46e5;
  padding: 12px 28px; /* 🔧 Slightly adjusted */
  border-radius: 6px; /* 🔧 Less rounded, more professional */
  font-size: 1rem; /* 🔧 Slightly smaller */
  font-weight: 500;
  cursor: pointer;

  /* 🛍️ Subtle professional transitions */
  transition: transform var(--duration-fast) var(--easing-standard),
    background-color var(--duration-fast) var(--easing-standard),
    box-shadow var(--duration-fast) var(--easing-standard);

  /* 🔧 More subtle shadow */
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.15);
  position: relative;
  will-change: transform, box-shadow;
}

/* ✨ Subtle button feedback - unified style */
.sig-load-more-btn:hover {
  transform: translateY(-1px); /* 🔧 Reduced from 2px to 1px */
  background-color: #4f46e5;
  color: white;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

.sig-load-more-btn:active {
  transform: translateY(0);
  transition-duration: 50ms;
}

.sig-load-more-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.sig-load-more-spinner {
  display: inline-block;
  width: 16px; /* 🔧 Slightly smaller */
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: sig-spin 0.8s linear infinite;
  margin-left: 8px;
}

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

/* 새로 로드된 아이템 애니메이션 - 더 절제됨 */
.sig-gallery-item.sig-new-item {
  opacity: 0;
  transform: translateY(8px); /* 🔧 Reduced from 20px */
  animation: sig-fadeInUp 0.4s var(--easing-standard) forwards; /* 🔧 Faster */
}

@keyframes sig-fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 접근성 개선 */
.sig-gallery-item:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.sig-load-more-btn:focus {
  outline: 2px solid #ffffff;
  outline-offset: 2px;
}

/* 고해상도 디스플레이 최적화 */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .sig-lazy-image {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
  }
}

/* ♿ 접근성 - Motion Reduction (지침 준수) */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .sig-gallery-item:hover {
    transform: none;
  }

  .sig-load-more-btn:hover {
    transform: none;
  }

  .sig-zoom-icon:hover {
    transform: none;
  }

  .sig-gallery-item.sig-new-item {
    animation: none;
    opacity: 1;
    transform: none;
  }
}

/* 🛒 E-commerce specific: Ensure gallery supports main content */
.sig-gallery-container {
  /* Subtle visual hierarchy - gallery as supporting content */
  filter: contrast(0.98);
}

.sig-gallery-container:hover {
  filter: contrast(1);
  transition: filter var(--duration-medium) var(--easing-standard);
}