/* ── Design Tokens ── */
:root {
  /* Gray scale */
  --gray-50:  #f7f8fa;
  --gray-100: #eeeef2;
  --gray-200: #dcdce4;
  --gray-400: #9494a8;
  --gray-600: #5a5a72;
  --gray-900: #1a1a2e;

  /* Accent */
  --accent:       #4f6ef7;
  --accent-hover: #3b54d4;
  --accent-ring:  rgba(79,110,247,0.12);

  /* Semantic */
  --bg:       var(--gray-50);
  --white:    #fff;
  --text:     var(--gray-900);
  --text-sec: var(--gray-600);
  --text-ter: var(--gray-400);
  --border:   var(--gray-100);
  --danger:   #ef4444;
  --danger-hover: #dc2626;
  --success:  #16a34a;

  /* Elevation */
  --shadow:       0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-hover: 0 8px 24px rgba(0,0,0,0.1);
  --shadow-modal: 0 8px 32px rgba(0,0,0,0.2);

  /* Shape */
  --radius:    10px;
  --radius-sm: 6px;
  --radius-pill: 999px;

  /* Motion */
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --sidebar-w: 220px;
  --topbar-h:  56px;

  /* Type Scale: 11 / 12 / 13 / 14 / 16 / 20 / 24 */
  --text-xs:   11px;
  --text-sm:   12px;
  --text-base: 14px;
  --text-md:   16px;
  --text-lg:   20px;
  --text-xl:   24px;
}

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; outline: none; font-family: inherit; background: none; }
input, textarea, select { font-family: inherit; outline: none; }

/* ── Layout: Sidebar + Main ── */
.app-layout { display: flex; min-height: 100vh; }

/* ── Sidebar ── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--white);
  border-right: 1px solid var(--border);
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 200;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.sidebar-header {
  padding: 24px 20px 20px;
  border-bottom: 1px solid var(--border);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.3px;
}

.sidebar-logo .logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent), #818cf8);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
}

.sidebar-logo .logo-icon svg { width: 16px; height: 16px; }

.sidebar-nav {
  flex: 1;
  padding: 12px 0;
}

.sidebar-nav .nav-label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-ter);
  padding: 8px 20px 4px;
  font-weight: 600;
}

.sidebar-nav .nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  margin: 2px 8px;
  border-radius: 8px;
  font-size: var(--text-base);
  color: var(--text-sec);
  transition: var(--transition);
  cursor: pointer;
  font-weight: 500;
}

.sidebar-nav .nav-item:hover {
  background: var(--accent-ring);
  color: var(--accent);
}

.sidebar-nav .nav-item.active {
  background: rgba(79,110,247,0.1);
  color: var(--accent);
  font-weight: 600;
}

.sidebar-nav .nav-item .count {
  margin-left: auto;
  font-size: var(--text-sm);
  color: var(--text-ter);
  background: var(--bg);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  min-width: 24px;
  text-align: center;
  font-weight: 500;
}

.sidebar-nav .nav-item.sub {
  padding-left: 44px;
  font-size: var(--text-sm);
}

.sidebar-nav .nav-item.active .count {
  background: var(--accent);
  color: #fff;
}

.sidebar-footer {
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  font-size: var(--text-sm);
  color: var(--text-ter);
}

.sidebar-footer a {
  color: var(--accent);
  font-weight: 500;
}

.sidebar-footer a:hover { text-decoration: underline; }

/* ── Main Content ── */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-w);
  min-height: 100vh;
}

/* ── Top Bar ── */
.topbar {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.topbar .page-title-sm {
  font-size: var(--text-md);
  font-weight: 600;
  margin-right: auto;
  color: var(--text);
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 6px 12px;
  gap: 8px;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.search-box:focus-within {
  border-color: var(--accent);
  background: var(--white);
  box-shadow: 0 0 0 3px var(--accent-ring);
}

.search-box input {
  border: none;
  background: transparent;
  font-size: var(--text-base);
  width: 200px;
}

.search-box svg { width: 16px; height: 16px; color: var(--text-ter); flex-shrink: 0; }

/* ── Search Suggestions ── */
.search-box { position: relative; }

.search-suggest {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  margin-top: 4px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(0,0,0,0.1);
  max-height: 380px;
  overflow-y: auto;
  z-index: 300;
}

.suggest-group { padding: 4px 0; }
.suggest-group + .suggest-group { border-top: 1px solid var(--border); }

.suggest-label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-ter);
  padding: 6px 14px 4px;
  font-weight: 600;
}

.suggest-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  font-size: 13px;
  color: var(--text);
  transition: background var(--transition);
  border-radius: 0;
  text-decoration: none;
  cursor: pointer;
}

.suggest-item:hover, .suggest-item:focus {
  background: var(--accent-ring);
  outline: none;
}

.suggest-icon { flex-shrink: 0; width: 18px; text-align: center; }
.suggest-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 500; }
.suggest-hint { font-size: 11px; color: var(--text-ter); flex-shrink: 0; }

.topbar .admin-link {
  font-size: var(--text-sm);
  color: var(--text-ter);
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  transition: var(--transition);
  white-space: nowrap;
  font-weight: 500;
}

.topbar .admin-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-ring);
}

/* ── Content Container ── */
.content-container { padding: 24px; max-width: 1400px; }

/* ── Album Grid ── */
.album-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

@media (max-width: 1200px) { .album-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 900px)  { .album-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px)  { .album-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; } }

.album-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
}

.album-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border);
}

.album-cover {
  position: relative;
  width: 100%;
  padding-top: 100%;
  background: var(--gray-100);
  overflow: hidden;
  border-radius: var(--radius) var(--radius) 0 0;
}

.album-cover img {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease, opacity 0.3s ease;
}

.album-card:hover .album-cover img { transform: scale(1.06); }

.album-cover .placeholder {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  color: var(--gray-200);
}

.album-cover .placeholder svg { width: 40px; height: 40px; }

/* Skeleton loading */
.album-cover.skeleton {
  background: linear-gradient(110deg, var(--gray-100) 30%, #e8e8f0 50%, var(--gray-100) 70%);
  background-size: 200% 100%;
  animation: shimmer 1.4s ease-in-out infinite;
}

@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.album-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  background: rgba(26,26,46,0.72);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  color: #fff;
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  z-index: 2;
  letter-spacing: 0.3px;
}

.album-info {
  padding: 12px 16px;
}

.album-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-bottom: 4px;
  letter-spacing: -0.1px;
}

.album-meta {
  font-size: var(--text-sm);
  color: var(--text-ter);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 6px;
}

.subcat-pill {
  display: inline-block;
  padding: 2px 8px;
  background: var(--accent-ring);
  color: var(--accent);
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
}

.subcat-pill:hover {
  background: var(--accent);
  color: #fff;
}

.subcat-pill.active {
  background: var(--accent);
  color: #fff;
}

/* ── Tag Chip Input ── */
.tag-chip-input {
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px;
  padding: 6px 10px; min-height: 40px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--white); cursor: text;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.tag-chip-input:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-ring);
}
.tag-chips-container { display: flex; flex-wrap: wrap; gap: 4px; }
.chip-tag {
  display: inline-flex; align-items: center; gap: 3px;
  padding: 2px 4px 2px 10px;
  background: var(--accent-ring); color: var(--accent);
  border-radius: var(--radius-pill); font-size: 12px; font-weight: 600;
  animation: chipIn 0.15s ease;
}
@keyframes chipIn { from { transform: scale(0.8); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.chip-remove {
  width: 18px; height: 18px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; color: var(--accent); opacity: 0.5;
  transition: opacity var(--transition), background var(--transition);
}
.chip-remove:hover { opacity: 1; background: var(--accent); color: #fff; }
.tag-chip-text {
  flex: 1; min-width: 80px; border: none; outline: none;
  font-size: var(--text-base); background: transparent; padding: 2px 0;
}
.tag-card:hover { background: var(--accent-ring); }
.tag-card:last-child { border-bottom: none; }

/* Tag Association Modal */
.tag-assoc-item:hover { background: var(--accent-ring); }
.tag-assoc-item input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--accent); cursor: pointer; }

/* ── Mobile Bottom Nav ── */
.mobile-nav {
  display: none;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: var(--white);
  border-top: 1px solid var(--border);
  z-index: 250;
  padding: 4px 0 env(safe-area-inset-bottom, 4px);
}

.mobile-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-around;
  max-width: 480px;
  margin: 0 auto;
}

.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 6px 12px;
  font-size: 10px;
  color: var(--text-ter);
  transition: var(--transition);
  border-radius: 8px;
  min-width: 56px;
}

.mobile-nav-item svg { width: 22px; height: 22px; }

.mobile-nav-item.active {
  color: var(--accent);
}

@media (max-width: 768px) {
  .mobile-nav { display: block; }
  .main-content { padding-bottom: 64px; }
  body { padding-bottom: 64px; }
}

/* ── Mobile Sidebar ── */
.sidebar-toggle {
  display: none;
  position: fixed;
  top: 12px; left: 12px;
  z-index: 300;
  width: 36px; height: 36px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 8px;
  align-items: center; justify-content: center;
  font-size: 18px;
  box-shadow: var(--shadow);
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    box-shadow: 4px 0 20px rgba(0,0,0,0.1);
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar-toggle { display: flex; }
  .main-content { margin-left: 0; }
  .content-container { padding: 16px; }
  .topbar { padding: 0 16px; }
  .topbar .search-box input { width: 120px; }
  .album-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
}

/* ── Sub Albums in Card ── */
.sub-albums-row {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

.sub-album-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 0;
  border-radius: 4px;
  transition: background var(--transition);
  text-decoration: none;
}

.sub-album-link:hover {
  background: var(--accent-ring);
}

.sub-album-link img {
  width: 20px;
  height: 20px;
  object-fit: cover;
  border-radius: 3px;
  flex-shrink: 0;
}

.sub-album-name {
  flex: 1;
  font-size: 12px;
  color: var(--text-sec);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sub-album-count {
  font-size: 11px;
  color: var(--text-ter);
  flex-shrink: 0;
}

/* ── Pagination ── */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 4px;
  margin-top: 32px;
  padding-bottom: 24px;
}

.pagination button {
  min-width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  background: var(--white);
  border: 1px solid var(--border);
  font-size: var(--text-base);
  color: var(--text-sec);
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 500;
}

.pagination button:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
}

.pagination button.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.pagination button:disabled { opacity: 0.4; cursor: default; }

/* ── Breadcrumb ── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--text-sm);
  color: var(--text-ter);
}

.breadcrumb a { transition: var(--transition); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: var(--gray-200); }

/* ── Album Detail ── */
.album-header {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
}

.album-header h1 {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.3px;
}

.album-header .meta {
  color: var(--text-ter);
  font-size: var(--text-base);
}

.album-desc-full {
  color: var(--text-sec);
  font-size: var(--text-base);
  margin-top: 12px;
  line-height: 1.6;
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

@media (max-width: 1024px) { .photo-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 768px)  { .photo-grid { grid-template-columns: repeat(2, 1fr); } }

.photo-item {
  position: relative;
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform var(--transition);
  user-select: none;
  -webkit-user-select: none;
}

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

.photo-item .img-wrap {
  width: 100%;
  padding-top: 100%;
  position: relative;
  background: var(--gray-100);
}

.photo-item .img-wrap img {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  object-fit: cover;
}

/* ── Lightbox ── */
.lightbox-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.94);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.lightbox-overlay.active { opacity: 1; pointer-events: auto; }

.lightbox-toolbar {
  position: absolute;
  top: 0; left: 0; right: 0;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 8px;
  padding: 16px 20px;
  z-index: 10;
}

.lightbox-tool-btn {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: rgba(255,255,255,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  transition: background var(--transition);
}

.lightbox-tool-btn:hover { background: rgba(255,255,255,0.25); }
.lightbox-tool-btn svg { width: 20px; height: 20px; }

.lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-content img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: 4px;
  transition: opacity 0.2s ease;
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px; height: 48px;
  background: rgba(255,255,255,0.12);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 24px;
  transition: background var(--transition);
  z-index: 10;
}

.lightbox-nav:hover { background: rgba(255,255,255,0.25); }
.lightbox-nav.prev { left: 16px; }
.lightbox-nav.next { right: 16px; }

.lightbox-counter {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: #fff;
  padding: 6px 16px;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 500;
  z-index: 10;
}

/* ── Admin Layout ── */
.admin-layout { display: flex; min-height: 100vh; }

.admin-sidebar {
  width: 220px;
  background: var(--white);
  color: var(--text);
  padding: 20px 0;
  flex-shrink: 0;
  border-right: 1px solid var(--border);
}

.admin-sidebar .logo {
  padding: 0 20px 20px;
  font-size: var(--text-md);
  font-weight: 700;
  border-bottom: 1px solid var(--border);
  margin-bottom: 8px;
  color: var(--text);
}

.admin-sidebar nav a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  margin: 2px 8px;
  border-radius: 8px;
  font-size: var(--text-base);
  color: var(--text-sec);
  transition: var(--transition);
  font-weight: 500;
}

.admin-sidebar nav a:hover,
.admin-sidebar nav a.active {
  background: var(--accent-ring);
  color: var(--accent);
}

.admin-main {
  flex: 1;
  padding: 24px;
  background: var(--bg);
  overflow-y: auto;
}

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

.admin-section-title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: 20px;
}

/* ── Unified Content View ── */
.content-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.toolbar-left, .toolbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}
.dropdown-wrapper { position: relative; }

/* Category Pill Navigation */
.category-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 16px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.category-nav::-webkit-scrollbar { display: none; }

.cat-pill {
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-sec);
  background: var(--white);
  border: 1px solid var(--border);
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
  flex-shrink: 0;
}
.cat-pill:hover { border-color: var(--accent); color: var(--accent); }
.cat-pill.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.cat-nav-btn {
  padding: 5px 10px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  color: var(--text-ter);
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: var(--transition);
  margin-left: auto;
}
.cat-nav-btn:hover { color: var(--accent); }
.cat-nav-btn + .cat-nav-btn { margin-left: 0; }

/* Category Section */
.cat-section {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 12px;
}
.cat-section.sub {
  margin-left: 24px;
  border-left: 3px solid var(--accent-ring);
}
.cat-section.empty {
  opacity: 0.65;
}

.cat-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  cursor: pointer;
  user-select: none;
  transition: background var(--transition);
  border-radius: var(--radius);
}
.cat-section.open > .cat-header {
  border-radius: var(--radius) var(--radius) 0 0;
}
.cat-header:hover { background: #fafafa; }
.cat-section.sub .cat-header { padding-left: 12px; }

.cat-arrow {
  font-size: 12px;
  color: var(--text-ter);
  width: 16px;
  text-align: center;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}
.cat-section.open > .cat-header .cat-arrow {
  color: var(--accent);
}

.cat-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}
.cat-section.sub .cat-name { font-size: 14px; font-weight: 500; }
.cat-section.empty .cat-name { color: var(--text-ter); }

.cat-count {
  font-size: 12px;
  color: var(--text-ter);
  font-weight: 400;
}

.cat-actions {
  margin-left: auto;
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

/* Category Body - fold animation */
.cat-body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.2s ease;
  overflow: hidden;
}
.cat-section.open > .cat-body {
  grid-template-rows: 1fr;
  overflow: visible;
}
.cat-body-inner {
  min-height: 0;
}

/* Album list inside category */
.cat-albums {
  border-top: 1px solid var(--border);
}

/* Album Row - Grid Layout */
.album-row {
  display: grid;
  grid-template-columns: 48px 1fr auto auto 70px 100px;
  gap: 12px;
  align-items: center;
  padding: 8px 16px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background var(--transition);
}
.album-row:last-child { border-bottom: none; }
.album-row:hover { background: #fafafa; }
.album-row.sub-album {
  padding-left: 32px;
  background: #fafbfd;
}

.album-row-cover {
  display: flex;
  align-items: center;
}

.album-row-info {
  min-width: 0;
  overflow: hidden;
}
.album-row-title {
  font-weight: 600;
  font-size: 14px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.album-row-desc {
  font-size: 12px;
  color: var(--text-ter);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-top: 1px;
}

.album-row-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
}
.album-tag-chip {
  display: inline-block;
  padding: 1px 6px;
  background: var(--accent-ring);
  color: var(--accent);
  border-radius: 8px;
  font-size: 11px;
  margin: 1px;
  white-space: nowrap;
}

.album-row-count {
  font-size: 13px;
  color: var(--accent);
  font-weight: 500;
  text-align: center;
}
.album-row-date {
  font-size: 12px;
  color: var(--text-ter);
  text-align: right;
}
.album-row-actions {
  display: flex;
  justify-content: flex-end;
}

/* Empty categories divider */
.empty-cats-divider {
  font-size: 12px;
  color: var(--text-ter);
  padding: 16px 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 500;
}

/* Search box in toolbar */
#contentSearchBox {
  width: 240px;
}
#contentSearchBox input {
  width: 180px;
}

/* ── Responsive: Unified Content ── */
@media (max-width: 1100px) {
  .content-toolbar { flex-wrap: wrap; }
  .toolbar-right { margin-left: auto; }
  #contentSearchBox { width: 200px; }
  #contentSearchBox input { width: 140px; }
}

@media (max-width: 900px) {
  .admin-main { padding: 16px; }
  .album-row {
    grid-template-columns: 48px 1fr auto 70px 90px;
    gap: 8px;
  }
  .cat-section.sub { margin-left: 16px; }
  .cat-header { padding: 10px 12px; }
  .cat-actions .btn-sm { padding: 3px 8px; font-size: 11px; }
  .content-toolbar { gap: 8px; }
}

@media (max-width: 700px) {
  .album-row {
    grid-template-columns: 40px 1fr auto 80px;
    gap: 6px;
    padding: 10px 12px;
  }
  .album-row-date { display: none; }
  .album-row-tags { display: none; }
  .content-toolbar { flex-direction: column; align-items: stretch; }
  .toolbar-left { flex-wrap: wrap; }
  .toolbar-right { margin-left: 0; align-self: flex-end; }
  .cat-section.sub { margin-left: 8px; }
  .cat-actions button { font-size: 11px; padding: 3px 8px; }
  #contentSearchBox { width: auto; flex: 1; min-width: 140px; }
  #contentSearchBox input { width: 100px; }
  .category-nav { gap: 2px; }
  .cat-pill { padding: 4px 10px; font-size: 12px; }
}

@media (max-width: 480px) {
  .admin-main { padding: 8px; }
  .album-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    padding: 10px;
    gap: 6px;
  }
  .album-row-cover { flex-shrink: 0; }
  .album-row-info { flex: 1; min-width: 0; }
  .album-row-count { margin-left: auto; }
  .album-row-date { display: none; }
  .album-row-tags { display: none; }
  .album-row-actions { width: 100%; justify-content: flex-end; margin-top: 2px; }
  .cat-section.sub { margin-left: 4px; border-left-width: 2px; }
  .cat-header { padding: 8px 10px; gap: 4px; }
  .cat-name { font-size: 14px; }
  .cat-section.sub .cat-name { font-size: 13px; }
  .cat-actions { gap: 2px; }
  .cat-actions .btn-sm { padding: 2px 6px; font-size: 10px; }
  .toolbar-left { gap: 4px; }
  .toolbar-left .btn { padding: 6px 10px; font-size: 13px; }
  .cat-nav-btn { font-size: 11px; padding: 4px 8px; }
  .cat-pill { padding: 3px 8px; font-size: 11px; }
}

/* ── Admin Forms & Tables ── */
.form-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}

.form-group { margin-bottom: 16px; }

.form-group label {
  display: block;
  font-size: var(--text-base);
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--text);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: var(--text-base);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-ring);
}

.form-actions { display: flex; gap: 8px; margin-top: 16px; }

.btn {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: var(--text-base);
  font-weight: 500;
  transition: var(--transition);
}

.btn-primary  { background: var(--accent); color: #fff; }
.btn-primary:hover  { background: var(--accent-hover); }
.btn-secondary { background: var(--bg); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--gray-100); }
.btn-danger    { background: var(--danger); color: #fff; }
.btn-danger:hover    { background: var(--danger-hover); }
.btn-sm { padding: 4px 12px; font-size: var(--text-sm); }

.data-table {
  width: 100%;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border-collapse: separate;
  border-spacing: 0;
}
/* Clip table corners without clipping dropdowns */
.data-table thead tr:first-child th:first-child  { border-top-left-radius: var(--radius); }
.data-table thead tr:first-child th:last-child   { border-top-right-radius: var(--radius); }
.data-table tbody tr:last-child td:first-child   { border-bottom-left-radius: var(--radius); }
.data-table tbody tr:last-child td:last-child    { border-bottom-right-radius: var(--radius); }

.data-table th,
.data-table td {
  padding: 12px 16px;
  text-align: left;
  font-size: var(--text-base);
  border-bottom: 1px solid var(--border);
  background: var(--white);
}

.data-table th {
  background: #fafafa;
  font-weight: 600;
  color: var(--text-sec);
  font-size: var(--text-sm);
}

.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: #fafafa; }

/* Action dropdown button states */
.action-dropdown-btn {
  transition: background var(--transition), color var(--transition);
}
.action-dropdown-btn.open {
  background: var(--accent-ring);
  color: var(--accent);
}

/* ── Upload Zone ── */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
  transition: border-color var(--transition), background var(--transition);
  cursor: pointer;
  background: var(--white);
}

.upload-zone:hover,
.upload-zone.drag-over {
  border-color: var(--accent);
  background: var(--accent-ring);
}

.upload-zone svg { width: 48px; height: 48px; color: var(--gray-200); margin-bottom: 12px; }
.upload-zone p { color: var(--text-ter); font-size: var(--text-base); }

.image-manage-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
  margin-top: 16px;
}

@media (max-width: 1024px) { .image-manage-grid { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 768px)  { .image-manage-grid { grid-template-columns: repeat(3, 1fr); } }

.image-manage-item {
  position: relative;
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.image-manage-item .img-wrap { padding-top: 100%; position: relative; }
.image-manage-item img {
  position: absolute; top: 0; left: 0;
  width: 100%; height: 100%; object-fit: cover;
}

.image-manage-item .actions {
  position: absolute;
  top: 4px; right: 4px;
  display: flex; gap: 4px;
  opacity: 0;
  transition: var(--transition);
}

.image-manage-item:hover .actions { opacity: 1; }

.image-manage-item .actions button {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: rgba(0,0,0,0.55);
  color: #fff;
  font-size: var(--text-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.image-manage-item .actions button:hover { background: rgba(0,0,0,0.8); }
.image-manage-item .actions button.danger:hover { background: var(--danger); }

.image-manage-item .cover-badge {
  position: absolute;
  top: 4px; left: 4px;
  background: var(--accent);
  color: #fff;
  font-size: 10px;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

/* ── Empty State ── */
.empty-state {
  text-align: center;
  padding: 64px 20px;
  color: var(--text-ter);
}

.empty-state svg { width: 64px; height: 64px; color: var(--gray-200); margin-bottom: 16px; }

/* ── Toast ── */
.toast-container {
  position: fixed;
  top: 20px; right: 20px;
  z-index: 99999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 380px;
}

.toast {
  background: #333;
  color: #fff;
  padding: 10px 16px;
  border-radius: var(--radius);
  font-size: 13px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  animation: slideIn 0.3s ease;
  display: flex;
  align-items: center;
  gap: 8px;
  line-height: 1.4;
}

.toast-icon {
  font-size: 16px;
  font-weight: 700;
  flex-shrink: 0;
}

.toast-msg { flex: 1; min-width: 0; }

.toast-action {
  background: rgba(255,255,255,0.2);
  color: #fff;
  border: none;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 12px;
  cursor: pointer;
  white-space: nowrap;
  font-weight: 500;
  transition: background 0.15s;
}

.toast-action:hover { background: rgba(255,255,255,0.35); }

.toast.success { background: var(--success); }
.toast.error   { background: var(--danger); }
.toast .toast-icon { color: inherit; }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to   { transform: translateX(0); opacity: 1; }
}

/* ── Button Loading ── */
.btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

/* ── Action Dropdown ── */
.action-dropdown-menu .action-item:hover {
  background: var(--accent-ring);
}

/* ── Album Row Delete Animation ── */
.album-row {
  transition: opacity 0.3s ease;
}
.album-row.deleting {
  opacity: 0;
  overflow: hidden;
}

/* ── Sticky Batch Bar ── */
#batchBar.sticky {
  position: sticky;
  top: 0;
  z-index: 5;
}

/* ── Login Page ── */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
}

.login-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
  width: 380px;
  max-width: 90vw;
}

.login-card h2 {
  text-align: center;
  margin-bottom: 24px;
  font-size: var(--text-xl);
  font-weight: 700;
}

.login-card .btn { width: 100%; padding: 12px; font-size: var(--text-md); margin-top: 8px; }

.login-error {
  color: var(--danger);
  font-size: var(--text-sm);
  text-align: center;
  margin-top: 12px;
}

/* ── Loading ── */
.loading {
  text-align: center;
  padding: 40px;
  color: var(--text-ter);
}

.spinner {
  width: 32px; height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 12px;
}

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

/* ── Category Pills (admin) ── */
.category-list { display: flex; flex-wrap: wrap; gap: 8px; }

.category-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--bg);
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  font-weight: 500;
}

.category-pill button {
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--gray-200);
  color: #fff;
  font-size: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.category-pill button:hover { background: var(--danger); }

/* ── Modal ── */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px;
  width: 480px;
  max-width: 90vw;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: var(--shadow-modal);
}

.modal h3 { margin-bottom: 16px; font-size: var(--text-md); font-weight: 600; }

/* ── Unauthorized ── */
.unauthorized {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  color: var(--text-ter);
  font-size: var(--text-md);
}