/*
 * 相簿系統共用樣式
 * 用於 gallery-index、gallery-after、gallery-before、gallery-fursuit 頁面
 */

/* ==========================================
   相簿入口頁 — 主題卡片
   ========================================== */

.gallery-index {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 0;
}

@media (min-width: 768px) {
  .gallery-index {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
}

.gallery-index-card {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: 1rem;
  text-decoration: none !important;
  color: inherit;
  background: #f5f5f5;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

:is(.dark) .gallery-index-card {
  background: #1e1e1e;
}

.gallery-index-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.gallery-index-card-image {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

.gallery-index-card-image img {
  display: block;
  width: 100%;
  height: 100%;
  margin: 0 !important;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.gallery-index-card:hover .gallery-index-card-image img {
  transform: scale(1.05);
}

.gallery-index-card-body {
  padding: 1.25rem;
  background: rgba(255, 255, 255, 0.95);
}

:is(.dark) .gallery-index-card-body {
  background: rgba(30, 30, 30, 0.95);
}

.gallery-index-card-title {
  margin: 0 0 0.5rem 0;
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.3;
}

.gallery-index-card-count {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.75rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
  background: rgba(59, 130, 246, 0.1);
  color: rgb(59, 130, 246);
}

:is(.dark) .gallery-index-card-count {
  background: rgba(96, 165, 250, 0.15);
  color: rgb(147, 197, 253);
}

/* ==========================================
   返回連結
   ========================================== */

.gallery-back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
  color: rgb(59, 130, 246);
  text-decoration: none !important;
  transition: color 0.2s;
}

.gallery-back-link:hover {
  color: rgb(37, 99, 235);
}

/* ==========================================
   相簿 Grid 排版（Packery 瀑布流）
   ========================================== */

.gallery-grid {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
}

.gallery-grid-item {
  border-radius: 0.5rem;
  overflow: hidden;
  cursor: pointer;
  position: relative;
  transition: transform 0.3s ease;
  /* 預設寬度（Packery 會用 grid-w class 覆蓋） */
  width: calc(50% - 5px);
  margin: 0 !important;
}

@media (min-width: 853px) {
  .gallery-grid-item {
    width: calc(33% - 5px);
  }
}

@media (min-width: 1280px) {
  .gallery-grid-item {
    width: calc(25% - 5px);
  }
}

.gallery-grid-item:hover {
  transform: scale(1.02);
}

.gallery-grid-item img {
  display: block;
  width: 100%;
  height: auto;
  margin: 0 !important;
  border-radius: 0.5rem;
  transition: opacity 0.4s ease;
}

.gallery-grid-item img.nozoom {
  cursor: pointer;
}

/* ==========================================
   月份區塊標題
   ========================================== */

.gallery-month-section {
  margin-bottom: 2rem;
}

.gallery-month-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid rgba(59, 130, 246, 0.2);
}

.gallery-month-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--tw-prose-headings, #111);
  margin: 0;
}

:is(.dark) .gallery-month-title {
  color: #e5e7eb;
}

.gallery-month-count {
  font-size: 0.85rem;
  color: #6b7280;
  font-weight: 400;
}

/* ==========================================
   時間軸側邊欄（桌面版）
   ========================================== */

.gallery-layout-with-sidebar {
  display: flex;
  gap: 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

.gallery-sidebar {
  display: none;
  width: 180px;
  flex-shrink: 0;
  position: sticky;
  top: 5rem;
  align-self: flex-start;
  max-height: calc(100vh - 6rem);
  overflow-y: auto;
  padding-right: 1rem;
}

@media (min-width: 1024px) {
  .gallery-sidebar {
    display: block;
  }
}

.gallery-sidebar-year {
  font-size: 1rem;
  font-weight: 700;
  color: var(--tw-prose-headings, #111);
  margin-top: 1rem;
  margin-bottom: 0.5rem;
  padding-left: 0.5rem;
}

:is(.dark) .gallery-sidebar-year {
  color: #e5e7eb;
}

.gallery-sidebar-year:first-child {
  margin-top: 0;
}

.gallery-sidebar-month {
  display: block;
  padding: 0.3rem 0.5rem 0.3rem 1rem;
  font-size: 0.9rem;
  color: #6b7280;
  text-decoration: none !important;
  border-left: 2px solid transparent;
  transition: all 0.2s;
}

.gallery-sidebar-month:hover {
  color: rgb(59, 130, 246);
  border-left-color: rgb(59, 130, 246);
}

.gallery-sidebar-month.active {
  color: rgb(59, 130, 246);
  font-weight: 600;
  border-left-color: rgb(59, 130, 246);
}

.gallery-main-content {
  flex: 1;
  min-width: 0;
}

/* 行動裝置時間軸 — 水平捲動 */
.gallery-mobile-timeline {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding: 0.75rem 0;
  margin-bottom: 1.5rem;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

@media (min-width: 1024px) {
  .gallery-mobile-timeline {
    display: none;
  }
}

.gallery-mobile-timeline-item {
  flex-shrink: 0;
  padding: 0.4rem 1rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
  white-space: nowrap;
  text-decoration: none !important;
  background: rgba(0, 0, 0, 0.05);
  color: #6b7280;
  border: 1px solid transparent;
  transition: all 0.2s;
  cursor: pointer;
}

:is(.dark) .gallery-mobile-timeline-item {
  background: rgba(255, 255, 255, 0.08);
  color: #9ca3af;
}

.gallery-mobile-timeline-item:hover,
.gallery-mobile-timeline-item.active {
  background: rgba(59, 130, 246, 0.1);
  color: rgb(59, 130, 246);
  border-color: rgb(59, 130, 246);
}

:is(.dark) .gallery-mobile-timeline-item:hover,
:is(.dark) .gallery-mobile-timeline-item.active {
  background: rgba(96, 165, 250, 0.15);
  color: rgb(147, 197, 253);
  border-color: rgb(96, 165, 250);
}

/* ==========================================
   繪師篩選列
   ========================================== */

.gallery-creator-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  padding: 1rem;
  border-radius: 0.75rem;
  background: rgba(0, 0, 0, 0.02);
  border: 1px solid rgba(0, 0, 0, 0.06);
}

:is(.dark) .gallery-creator-filter {
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(255, 255, 255, 0.08);
}

.gallery-creator-filter-label {
  display: flex;
  align-items: center;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--tw-prose-headings, #111);
  margin-right: 0.25rem;
}

:is(.dark) .gallery-creator-filter-label {
  color: #e5e7eb;
}

.gallery-creator-pill {
  padding: 0.3rem 0.85rem;
  border-radius: 999px;
  font-size: 0.8rem;
  cursor: pointer;
  border: 1px solid rgba(0, 0, 0, 0.12);
  background: transparent;
  color: #4b5563;
  transition: all 0.2s;
  white-space: nowrap;
}

:is(.dark) .gallery-creator-pill {
  border-color: rgba(255, 255, 255, 0.15);
  color: #9ca3af;
}

.gallery-creator-pill:hover {
  border-color: rgb(59, 130, 246);
  color: rgb(59, 130, 246);
}

.gallery-creator-pill.active {
  background: rgb(59, 130, 246);
  border-color: rgb(59, 130, 246);
  color: #fff;
}

:is(.dark) .gallery-creator-pill.active {
  background: rgb(59, 130, 246);
  border-color: rgb(59, 130, 246);
  color: #fff;
}

/* ==========================================
   活動主題選擇器（半套獸裝用）
   ========================================== */

.gallery-event-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.gallery-event-tab {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  border-radius: 0.75rem;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  border: 2px solid rgba(0, 0, 0, 0.08);
  background: transparent;
  color: #4b5563;
  transition: all 0.25s ease;
}

:is(.dark) .gallery-event-tab {
  border-color: rgba(255, 255, 255, 0.1);
  color: #9ca3af;
}

.gallery-event-tab:hover {
  border-color: rgb(59, 130, 246);
  color: rgb(59, 130, 246);
  background: rgba(59, 130, 246, 0.05);
}

.gallery-event-tab.active {
  border-color: rgb(59, 130, 246);
  background: rgb(59, 130, 246);
  color: #fff;
}

.gallery-event-tab-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.5rem;
  height: 1.5rem;
  padding: 0 0.4rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(0, 0, 0, 0.08);
  color: inherit;
}

.gallery-event-tab.active .gallery-event-tab-count {
  background: rgba(255, 255, 255, 0.25);
}

/* 活動資訊（日期、地點） */
.gallery-event-info {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  background: rgba(59, 130, 246, 0.05);
  font-size: 0.9rem;
  color: #6b7280;
}

:is(.dark) .gallery-event-info {
  background: rgba(96, 165, 250, 0.08);
  color: #9ca3af;
}

/* 活動內容區 */
.gallery-event-content {
  display: none;
}

.gallery-event-content.active {
  display: block;
  animation: galleryFadeIn 0.4s ease;
}

/* ==========================================
   Lightbox
   ========================================== */

.gallery-lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.gallery-lightbox.active {
  opacity: 1;
  visibility: visible;
}

.gallery-lightbox-image {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: 0.5rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  transition: transform 0.3s ease;
  user-select: none;
  -webkit-user-drag: none;
}

.gallery-lightbox-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  transition: background 0.2s;
  z-index: 10;
}

.gallery-lightbox-close:hover {
  background: rgba(255, 255, 255, 0.3);
}

.gallery-lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  font-size: 1.25rem;
  cursor: pointer;
  transition: background 0.2s, opacity 0.2s;
  z-index: 10;
}

.gallery-lightbox-nav:hover {
  background: rgba(255, 255, 255, 0.25);
}

.gallery-lightbox-nav.prev {
  left: 1rem;
}

.gallery-lightbox-nav.next {
  right: 1rem;
}

.gallery-lightbox-nav:disabled {
  opacity: 0.3;
  cursor: default;
}

.gallery-lightbox-counter {
  position: absolute;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.35rem 1rem;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.6);
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.85rem;
  font-weight: 500;
  z-index: 10;
}

/* Lightbox 繪師資訊 */
.gallery-lightbox-creator {
  position: absolute;
  bottom: 1.25rem;
  right: 1.25rem;
  padding: 0.5rem 1rem;
  border-radius: 0.75rem;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: 0.85rem;
  z-index: 10;
}

.gallery-lightbox-creator a {
  color: #93c5fd;
  text-decoration: none;
}

.gallery-lightbox-creator a:hover {
  text-decoration: underline;
}

/* ==========================================
   共用動畫
   ========================================== */

@keyframes galleryFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================
   空狀態
   ========================================== */

.gallery-empty {
  text-align: center;
  padding: 3rem 1rem;
  color: #9ca3af;
  font-size: 1rem;
}

/* ==========================================
   篩選時隱藏的項目
   ========================================== */

.gallery-grid-item.filtered-out {
  display: none;
}

.gallery-month-section.filtered-out {
  display: none;
}