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

:root {
  --bg:            #0f0e0d;
  --bg-card:       #1a1917;
  --bg-card-2:     #211f1d;
  --bg-hover:      #252320;
  --border:        #2e2b28;
  --border-light:  #3a3733;
  --text:          #e0d9d0;
  --text-2:        #a09890;
  --text-3:        #6a6460;
  --accent:        #c8956c;
  --accent-h:      #d9a87c;
  --accent-dim:    rgba(200,149,108,0.14);

  --label-true:    #6dab6d;
  --label-true-bg: rgba(109,171,109,0.12);
  --label-fake:    #c46c6c;
  --label-fake-bg: rgba(196,108,108,0.12);
  --label-doubt:   #c4a86c;
  --label-doubt-bg:rgba(196,168,108,0.12);
  --label-none:    #4a4845;
  --label-none-bg: rgba(74,72,69,0.15);

  --success:       #6dab6d;
  --error:         #c46c6c;

  --r:   6px;
  --r-lg:10px;
  --sh:  0 2px 12px rgba(0,0,0,0.5);
  --tr:  0.18s ease;
}

/* ── Light theme ──────────────────────────────────────────────────────────── */
:root[data-theme="light"] {
  --bg:            #f7f4f0;
  --bg-card:       #ffffff;
  --bg-card-2:     #f0ece7;
  --bg-hover:      #e8e2db;
  --border:        #ddd6ce;
  --border-light:  #ccc4bb;
  --text:          #28201a;
  --text-2:        #6a5e52;
  --text-3:        #9a9088;
  --accent:        #a86c3c;
  --accent-h:      #b87848;
  --accent-dim:    rgba(168,108,60,0.10);

  --label-true:    #2e7e2e;
  --label-true-bg: rgba(46,126,46,0.10);
  --label-fake:    #9a2e2e;
  --label-fake-bg: rgba(154,46,46,0.10);
  --label-doubt:   #7a6020;
  --label-doubt-bg:rgba(122,96,32,0.10);
  --label-none:    #888480;
  --label-none-bg: rgba(136,132,128,0.12);

  --success:       #2e7e2e;
  --error:         #9a2e2e;

  --sh:  0 2px 12px rgba(0,0,0,0.10);
}

/* Light theme: auth page gradient override */
:root[data-theme="light"] #page-auth::before {
  background:
    radial-gradient(ellipse at 20% 50%, rgba(180,130,60,.12) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(120,100,160,.10) 0%, transparent 55%),
    radial-gradient(ellipse at 60% 80%, rgba(60,120,150,.08) 0%, transparent 50%);
}

/* Light theme: header backdrop */
:root[data-theme="light"] .app-header {
  background: rgba(247,244,240,0.92);
}
:root[data-theme="light"] .annotate-topbar {
  background: rgba(247,244,240,0.94);
}

/* Light theme: button contrast fixes */
:root[data-theme="light"] .btn-accent {
  color: #fff;
}
:root[data-theme="light"] .btn-accent:hover {
  color: #fff;
}
:root[data-theme="light"] .btn-outline {
  color: var(--text);
  border-color: var(--border-light);
}
:root[data-theme="light"] .btn-outline:hover {
  color: var(--text);
  border-color: var(--text-3);
  background: var(--bg-hover);
}
:root[data-theme="light"] .btn-ghost {
  color: var(--text-2);
}
:root[data-theme="light"] .btn-ghost:hover {
  color: var(--text);
}
:root[data-theme="light"] .nav-step-btn {
  color: var(--text);
}
:root[data-theme="light"] .filter-btn {
  color: var(--text);
}
:root[data-theme="light"] .header-nav .btn-primary {
  border-color: var(--accent);
}

html { font-size: 15px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

::selection { background: var(--accent-dim); color: var(--accent-h); }

::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-3); }

/* ── Page system ──────────────────────────────────────────────────────────── */
.page { display: none; flex-direction: column; min-height: 100vh; }
.page.active { display: flex; }

/* ── Header ───────────────────────────────────────────────────────────────── */
.app-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(15,14,13,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: 52px;
  display: flex; align-items: center; padding: 0 24px;
  gap: 16px;
}
.app-header .logo {
  font-family: Georgia, '宋体', serif;
  font-size: 1rem; letter-spacing: 0.12em;
  color: var(--accent); text-decoration: none;
  white-space: nowrap; cursor: pointer;
}
.app-header .logo span { color: var(--text-2); }
.header-logo-img { height: 28px; width: auto; object-fit: contain; display: block; }
.header-nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.header-nav a, .header-nav button {
  background: none; border: none; cursor: pointer;
  color: var(--text-2); font-size: 0.87rem;
  padding: 6px 12px; border-radius: var(--r);
  text-decoration: none; white-space: nowrap;
  transition: color var(--tr), background var(--tr);
}
.header-nav a:hover, .header-nav button:hover { color: var(--text); background: var(--bg-card); }
.header-nav .btn-primary {
  color: var(--accent); border: 1px solid rgba(200,149,108,0.3);
}
.header-nav .btn-primary:hover { background: var(--accent-dim); color: var(--accent-h); }
.theme-btn {
  background: none; border: 1px solid var(--border);
  color: var(--text-3); border-radius: var(--r);
  padding: 4px 10px; cursor: pointer; font-size: .75rem;
  transition: all var(--tr); white-space: nowrap;
}
.theme-btn:hover { color: var(--text); border-color: var(--border-light); }
.breadcrumb { display: flex; align-items: center; gap: 8px; color: var(--text-3); font-size: 0.87rem; }
.breadcrumb span { color: var(--text-3); }
.breadcrumb a { color: var(--text-2); text-decoration: none; cursor: pointer; }
.breadcrumb a:hover { color: var(--text); }

/* ── Auth page (split layout) ─────────────────────────────────────────────── */
#page-auth {
  flex-direction: row !important;
  height: 100vh;
  overflow: hidden;
  /* Force light theme regardless of global setting */
  --bg:            #f7f4f0;
  --bg-card:       #ffffff;
  --bg-card-2:     #f0ece7;
  --bg-hover:      #e8e2db;
  --border:        #ddd6ce;
  --border-light:  #ccc4bb;
  --text:          #28201a;
  --text-2:        #6a5e52;
  --text-3:        #9a9088;
  --accent:        #a86c3c;
  --accent-h:      #b87848;
  --accent-dim:    rgba(168,108,60,0.10);
  --sh:            0 2px 12px rgba(0,0,0,0.10);
  background: var(--bg);
}

/* Left: collage */
.auth-left {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: var(--bg-card-2);
  min-width: 0;
}

.auth-collage {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  grid-template-rows: 1fr 1fr 0.6fr;
  gap: 3px;
  height: 100%;
}

.collage-cell { overflow: hidden; background: var(--bg-card); }
.collage-cell.cell-a { grid-column: 1; grid-row: 1 / 3; }
.collage-cell.cell-b { grid-column: 2; grid-row: 1; }
.collage-cell.cell-c { grid-column: 3; grid-row: 1; }
.collage-cell.cell-d { grid-column: 2; grid-row: 2; }
.collage-cell.cell-e { grid-column: 3; grid-row: 2; }
.collage-cell.cell-f { grid-column: 1 / 4; grid-row: 3; }

.collage-cell img {
  width: 100%; height: 100%;
  object-fit: cover; display: block;
  transition: transform 0.4s ease;
}
.collage-cell:hover img { transform: scale(1.03); }

.auth-left-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(15,14,13,.25) 0%, rgba(15,14,13,.45) 100%);
  pointer-events: none;
}

.collage-refresh-btn {
  position: absolute; bottom: 20px; right: 20px; z-index: 10;
  background: rgba(0,0,0,.5); border: 1px solid rgba(255,255,255,.18);
  color: rgba(255,255,255,.82); border-radius: var(--r);
  padding: 6px 16px; font-size: .78rem; cursor: pointer;
  backdrop-filter: blur(6px); transition: all var(--tr);
}
.collage-refresh-btn:hover { background: rgba(0,0,0,.7); color: #fff; }

/* Right: form */
.auth-right {
  width: 360px; min-width: 320px; flex-shrink: 0;
  background: var(--bg);
  border-left: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  padding: 48px 40px;
}
.auth-right-inner { width: 100%; }

.auth-logo-wrap { text-align: center; margin-bottom: 40px; }
.auth-logo-img { max-width: 160px; max-height: 80px; object-fit: contain; }
.auth-logo-text {
  font-family: Georgia, '宋体', serif;
  font-size: 1.5rem; letter-spacing: .1em; color: var(--accent);
}

.auth-remember-row {
  display: flex; align-items: center; gap: 8px;
  font-size: .82rem; color: var(--text-2); cursor: pointer;
  padding: 0 2px;
}
.auth-remember-row input[type="checkbox"] {
  width: auto; letter-spacing: 0; cursor: pointer;
  accent-color: var(--accent);
}

@media (max-width: 680px) {
  #page-auth { flex-direction: column !important; }
  .auth-left { display: none; }
  .auth-right { width: 100%; border-left: none; padding: 48px 32px; }
}
.btn { /* base button */
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: none; cursor: pointer; border-radius: var(--r);
  font-size: .88rem; padding: 9px 18px; transition: all var(--tr);
  white-space: nowrap; font-family: inherit;
}
.btn-accent {
  background: var(--accent); color: #1a1208;
  font-weight: 600; letter-spacing: .04em;
}
.btn-accent:hover { background: var(--accent-h); }
.btn-outline {
  background: none; border: 1px solid var(--border-light);
  color: var(--text-2);
}
.btn-outline:hover { border-color: var(--text-3); color: var(--text); background: var(--bg-card); }
.btn-ghost { background: none; border: none; color: var(--text-2); }
.btn-ghost:hover { color: var(--text); background: var(--bg-hover); }
.btn-danger { background: none; border: 1px solid var(--error); color: var(--error); }
.btn-danger:hover { background: rgba(196,108,108,.1); }

/* ── Auth form (shared, used in auth-right) ──────────────────────────────── */
.auth-form { display: flex; flex-direction: column; gap: 12px; }
.auth-form input {
  background: var(--bg-card); border: 1px solid var(--border-light);
  border-radius: var(--r); padding: 10px 14px;
  color: var(--text); font-size: .95rem; text-align: center;
  letter-spacing: .2em; transition: border-color var(--tr);
  outline: none; width: 100%;
}
.auth-form input:focus { border-color: var(--accent); }
.auth-form input::placeholder { letter-spacing: .06em; color: var(--text-3); }
.auth-error { color: var(--error); font-size: .82rem; min-height: 18px; }
.page-content { flex: 1; padding: 32px 32px; max-width: 1280px; width: 100%; margin: 0 auto; }

/* ── Artists page ─────────────────────────────────────────────────────────── */
.page-heading {
  font-family: Georgia, '宋体', serif;
  font-size: 1.4rem; font-weight: 400; color: var(--text);
  margin-bottom: 6px;
}
.page-sub { color: var(--text-2); font-size: .88rem; margin-bottom: 28px; }
.artists-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}
.artist-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 22px 24px;
  cursor: pointer;
  transition: border-color var(--tr), background var(--tr), transform var(--tr);
}
.artist-card:hover {
  border-color: var(--accent);
  background: var(--bg-card-2);
  transform: translateY(-1px);
}
.artist-name {
  font-family: Georgia, '宋体', serif;
  font-size: 1.25rem; font-weight: 400;
  color: var(--text); margin-bottom: 14px;
}
.artist-stats { display: flex; flex-direction: column; gap: 10px; }
.stat-bar-wrap { display: flex; align-items: center; gap: 10px; }
.stat-bar-track {
  flex: 1; height: 3px; background: var(--border);
  border-radius: 2px; overflow: hidden;
}
.stat-bar-fill { height: 100%; border-radius: 2px; transition: width .5s ease; }
.stat-bar-fill.fill-accent { background: var(--accent); }
.artist-counts {
  display: flex; align-items: center; gap: 6px;
  font-size: .8rem; color: var(--text-2);
}
.ac-sep { color: var(--border-light); }
.ac-total { color: var(--text-2); }
.ac-labeled { color: var(--text-2); }
.artist-label-badges { display: flex; gap: 6px; flex-wrap: wrap; }
.al-badge {
  display: inline-flex; align-items: center;
  padding: 2px 8px; border-radius: 8px;
  font-size: .75rem; font-weight: 600;
}

/* ── Artworks page ────────────────────────────────────────────────────────── */
.artworks-summary {
  display: flex; gap: 20px; flex-wrap: wrap;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--r); padding: 14px 20px; margin-bottom: 18px;
  align-items: center;
}
.sum-item { display: flex; align-items: center; gap: 6px; font-size: .85rem; }
.sum-label { color: var(--text-2); }
.sum-val { font-weight: 600; color: var(--text); }
.sum-val.c-true  { color: var(--label-true); }
.sum-val.c-fake  { color: var(--label-fake); }
.sum-val.c-doubt { color: var(--label-doubt); }
.sum-val.c-accent{ color: var(--accent); }

.toolbar {
  display: flex; align-items: center; gap: 10px;
  flex-wrap: wrap; margin-bottom: 16px;
}
.label-filter-group { display: flex; gap: 6px; flex-wrap: wrap; }
.label-filter-pill {
  display: inline-flex; align-items: center;
  padding: 4px 12px; border-radius: 12px; border: 1px solid;
  font-size: .78rem; font-weight: 600; cursor: pointer;
  transition: all var(--tr); white-space: nowrap;
}
.label-filter-pill.pill-true  { border-color: var(--label-true); color: var(--label-true); background: transparent; }
.label-filter-pill.pill-fake  { border-color: var(--label-fake); color: var(--label-fake); background: transparent; }
.label-filter-pill.pill-doubt { border-color: var(--label-doubt);color: var(--label-doubt);background: transparent; }
.label-filter-pill.pill-other { border-color: var(--accent);     color: var(--accent);     background: transparent; }
.label-filter-pill.active.pill-true  { background: var(--label-true-bg); }
.label-filter-pill.active.pill-fake  { background: var(--label-fake-bg); }
.label-filter-pill.active.pill-doubt { background: var(--label-doubt-bg); }
.label-filter-pill.active.pill-other { background: var(--accent-dim); }
.label-filter-pill:hover { opacity: .8; }

.filter-group { display: flex; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--r); overflow: hidden; }
.filter-btn {
  background: none; border: none; cursor: pointer;
  color: var(--text-2); font-size: .82rem; padding: 6px 14px;
  border-right: 1px solid var(--border);
  transition: all var(--tr);
}
.filter-btn:last-child { border-right: none; }
.filter-btn.active { background: var(--accent-dim); color: var(--accent); }
.filter-btn:hover:not(.active) { color: var(--text); background: var(--bg-hover); }

.sort-select {
  background: var(--bg-card); border: 1px solid var(--border);
  color: var(--text-2); border-radius: var(--r);
  padding: 6px 36px 6px 10px; font-size: .82rem; cursor: pointer;
  outline: none;
  appearance: none; -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23888'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
}
.sort-select:focus { border-color: var(--accent); }

.view-toggle { display: flex; gap: 6px; margin-left: auto; }
.view-btn {
  background: var(--bg-card); border: 1px solid var(--border);
  color: var(--text-2); border-radius: var(--r);
  padding: 6px 10px; cursor: pointer; font-size: .9rem;
  transition: all var(--tr);
}
.view-btn.active { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }

/* List view */
.artworks-table { width: 100%; border-collapse: collapse; }
.artworks-table th {
  text-align: left; font-size: .78rem; color: var(--text-3);
  font-weight: 500; letter-spacing: .04em; padding: 8px 12px;
  border-bottom: 1px solid var(--border); white-space: nowrap;
}
.artworks-table td {
  padding: 10px 12px; border-bottom: 1px solid var(--border);
  font-size: .85rem; vertical-align: middle;
}
.artworks-table tr:hover td { background: var(--bg-hover); cursor: pointer; }
.artwork-thumb {
  width: 46px; height: 46px; object-fit: cover;
  border-radius: 3px; display: block;
  background: var(--bg-card-2); border: 1px solid var(--border);
}
.thumb-empty {
  width: 46px; height: 46px; background: var(--bg-card-2);
  border-radius: 3px; border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-3); font-size: .7rem;
}
.artwork-name-cell { max-width: 280px; }
.artwork-name-text { color: var(--text); line-height: 1.4; }
.artwork-sub-text { color: var(--text-2); font-size: .78rem; margin-top: 2px; }
.price-text { color: var(--accent); white-space: nowrap; }
.date-text { color: var(--text-2); white-space: nowrap; font-size: .82rem; }

/* Grid view */
.artworks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 14px;
}
.artwork-grid-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--r-lg); overflow: hidden; cursor: pointer;
  transition: border-color var(--tr), transform var(--tr);
}
.artwork-grid-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.grid-img-wrap { position: relative; aspect-ratio: 3/4; overflow: hidden; background: var(--bg-card-2); }
.grid-img { width: 100%; height: 100%; object-fit: cover; display: block; }
.grid-img-placeholder {
  width: 100%; height: 100%; display: flex; align-items: center; justify-content: center;
  color: var(--text-3); font-size: .75rem;
}
.grid-label-badge {
  position: absolute; top: 8px; right: 8px;
  font-size: .72rem; padding: 2px 7px; border-radius: 10px;
  font-weight: 600;
}
.grid-card-body { padding: 12px; }
.grid-card-name { font-size: .82rem; color: var(--text); line-height: 1.4; margin-bottom: 6px; }
.grid-card-price { font-size: .78rem; color: var(--accent); }
.grid-card-date  { font-size: .75rem; color: var(--text-2); }

/* Label badges */
.label-badge {
  display: inline-flex; align-items: center;
  padding: 2px 9px; border-radius: 10px;
  font-size: .75rem; font-weight: 600; white-space: nowrap;
}
.badge-true   { background: var(--label-true-bg);  color: var(--label-true); }
.badge-fake   { background: var(--label-fake-bg);  color: var(--label-fake); }
.badge-doubt  { background: var(--label-doubt-bg); color: var(--label-doubt); }
.badge-none   { background: var(--label-none-bg);  color: var(--text-3); }

/* Pagination */
.pagination {
  display: flex; align-items: center; justify-content: center;
  gap: 8px; padding: 24px 0;
}
.page-info { color: var(--text-2); font-size: .85rem; }

/* ── Annotate page ────────────────────────────────────────────────────────── */
#page-annotate {
  display: none; /* overridden by .active */
  flex-direction: row !important;
  height: 100vh; overflow: hidden;
}
#page-annotate.active { display: flex !important; }

.annotate-sidebar {
  width: 268px; min-width: 268px;
  background: var(--bg-card); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; overflow: hidden;
  transition: width .2s ease, min-width .2s ease, border-right-color .2s ease;
}
.annotate-sidebar.collapsed {
  width: 0; min-width: 0; border-right-color: transparent; overflow: hidden;
}
.sidebar-header {
  padding: clamp(6px, 1.4vh, 14px) 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-card-2);
}
.sidebar-stats-row {
  display: flex; align-items: baseline; gap: 6px; margin-bottom: 2px;
}
.sidebar-label-big { font-size: .75rem; color: var(--text-2); }
.sidebar-count { font-size: 1.1rem; font-weight: 600; color: var(--accent); }
.sidebar-count-total { font-size: .85rem; color: var(--text-3); }
.sidebar-breakdown { display: flex; gap: 10px; font-size: .75rem; margin-top: 4px; }
.sb-true  { color: var(--label-true); }
.sb-fake  { color: var(--label-fake); }
.sb-doubt { color: var(--label-doubt); }

.sidebar-filters { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 8px; }
.sf-chip {
  font-size: .68rem; color: var(--text-3);
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 4px; padding: 1px 7px; white-space: nowrap;
}
.sf-chip-filter { color: var(--accent); border-color: rgba(200,149,108,0.3); }

.sidebar-list { flex: 1; overflow-y: auto; }
.sidebar-item {
  padding: 10px 16px; cursor: pointer;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: flex-start; gap: 10px;
  transition: background var(--tr);
}
.sidebar-item:hover { background: var(--bg-hover); }
.sidebar-item.active { background: var(--accent-dim) !important; }
.sidebar-item-idx { font-size: .7rem; color: var(--text-3); min-width: 22px; margin-top: 2px; }
.sidebar-item-body { flex: 1; min-width: 0; }
.sidebar-item-name {
  font-size: .82rem; color: var(--text); line-height: 1.35;
  overflow: hidden; display: -webkit-box;
  -webkit-line-clamp: 2; -webkit-box-orient: vertical;
}
.sidebar-item-date { font-size: .72rem; color: var(--text-3); margin-top: 2px; }
.sidebar-item-badge { margin-top: 3px; }

.annotate-main { flex: 1; display: flex; flex-direction: column; overflow-y: auto; overflow-x: hidden; }

.annotate-topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(15,14,13,0.94); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  padding: 0 24px; height: 52px; flex-shrink: 0; overflow: hidden;
  display: flex; align-items: center; gap: 8px;
}
.nav-step-btn {
  background: var(--bg-card); border: 1px solid var(--border);
  color: var(--text-2); border-radius: var(--r);
  padding: 5px 12px; cursor: pointer; font-size: .82rem;
  transition: all var(--tr); white-space: nowrap;
}
.nav-step-btn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.nav-step-btn:disabled { opacity: .35; cursor: default; }
.nav-sep { width: 1px; height: 20px; background: var(--border); margin: 0 4px; }
.topbar-spacer { flex: 1; }

.annotate-body { flex: 1; display: grid; grid-template-columns: 1fr 340px; gap: 24px; padding: 24px; align-items: start; }

.artwork-image-col { display: flex; flex-direction: column; gap: 16px; }
.artwork-img-wrap {
  position: relative; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: var(--r-lg);
  overflow: hidden; cursor: zoom-in;
  min-height: 280px; display: flex; align-items: center; justify-content: center;
}
.artwork-img-main {
  max-width: 100%; max-height: 70vh; width: 100%; height: auto;
  object-fit: contain; display: block;
}
.artwork-img-placeholder-big {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 8px; color: var(--text-3); padding: 60px 20px;
  font-size: .85rem;
}
.artwork-img-placeholder-big .icon { font-size: 2rem; }

.ann-desc-wrap {
  border: 1px solid var(--border); border-radius: var(--r-lg);
  overflow: hidden; background: var(--bg-card);
}
.ann-desc-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 14px; cursor: pointer; user-select: none;
}
.ann-desc-header:hover { background: var(--bg-hover, var(--bg-2)); }
.ann-desc-label { font-size: .78rem; color: var(--text-3); font-weight: 500; }
.ann-desc-toggle-icon { font-size: .65rem; color: var(--text-3); }
.ann-desc-body { padding: 12px 14px; border-top: 1px solid var(--border); }
.ann-desc-para {
  font-size: .82rem; color: var(--text-2); line-height: 1.7;
  margin: 0 0 10px; white-space: pre-wrap;
}
.ann-desc-para:last-child { margin-bottom: 0; }

.artwork-info-col { display: flex; flex-direction: column; gap: 16px; position: sticky; top: 76px; height: calc(100vh - 100px); max-height: calc(100vh - 100px); overflow-y: auto; }
.artwork-title-main {
  font-family: Georgia, '宋体', serif;
  font-size: 1rem; font-weight: 400; color: var(--text);
  line-height: 1.5;
}
.meta-grid { display: grid; grid-template-columns: auto 1fr; gap: 6px 12px; }
.meta-key { font-size: .78rem; color: var(--text-3); white-space: nowrap; align-self: start; padding-top: 1px; }
.meta-val { font-size: .82rem; color: var(--text-2); line-height: 1.5; word-break: break-all; }
.meta-val.price { color: var(--accent); font-weight: 600; }

.btn-detail-link {
  font-size: .78rem; color: var(--text-3);
  background: none; border: none; cursor: pointer;
  text-decoration: underline; text-align: left;
  transition: color var(--tr); padding: 0;
}
.btn-detail-link:hover { color: var(--accent); }

/* Label section */
.label-box {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 18px;
}
.label-box-title { font-size: .78rem; color: var(--text-3); letter-spacing: .06em; margin-bottom: 14px; text-transform: uppercase; }
.current-label-display {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px; border-radius: var(--r);
  background: var(--bg-card-2); border: 1px solid var(--border);
  margin-bottom: 14px; min-height: 38px;
}
.current-label-text { font-size: .85rem; color: var(--text-2); }
.label-type-btns { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.label-type-btn {
  flex: 1; min-width: 0;
  background: var(--bg-card-2); border: 1px solid var(--border);
  border-radius: var(--r); padding: 8px 6px;
  cursor: pointer; text-align: center;
  transition: all var(--tr); font-size: .85rem; color: var(--text-2);
}
.label-type-btn .shortcut {
  display: block; font-size: .65rem; color: var(--text-3);
  margin-bottom: 2px; font-family: monospace;
}
.label-type-btn.selected-true  { background: var(--label-true-bg);  border-color: var(--label-true);  color: var(--label-true); }
.label-type-btn.selected-fake  { background: var(--label-fake-bg);  border-color: var(--label-fake);  color: var(--label-fake); }
.label-type-btn.selected-doubt { background: var(--label-doubt-bg); border-color: var(--label-doubt); color: var(--label-doubt); }
.label-type-btn.selected-other { background: var(--accent-dim); border-color: var(--accent); color: var(--accent); }
.label-type-btn:hover:not([class*="selected-"]) { border-color: var(--border-light); color: var(--text); background: var(--bg-hover); }

.label-note { width: 100%; background: var(--bg); border: 1px solid var(--border-light); border-radius: var(--r); color: var(--text); padding: 8px 10px; font-size: .85rem; resize: vertical; min-height: 60px; outline: none; margin-bottom: 12px; font-family: inherit; transition: border-color var(--tr); }
.label-note:focus { border-color: var(--accent); }

.label-actions { display: flex; gap: 8px; }
.label-actions .btn { flex: 1; }

.shortcuts-hint {
  margin-top: auto; padding-top: 16px;
  display: flex; flex-wrap: wrap; gap: 8px;
  font-size: .75rem; color: var(--text-3);
}
.shortcuts-hint .hint-row { display: flex; align-items: center; gap: 4px; }
kbd {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--bg-card-2); border: 1px solid var(--border-light);
  border-radius: 3px; padding: 1px 5px; font-size: .7rem;
  font-family: monospace; color: var(--text-2); min-width: 20px;
}

/* ── Export page ──────────────────────────────────────────────────────────── */
.export-panels { display: flex; gap: 16px; margin-bottom: 24px; flex-wrap: wrap; }
.export-panel {
  flex: 1; min-width: 220px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 18px 20px;
}
.export-stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-top: 14px; }
.export-stat-item { text-align: center; }
.export-stat-num { font-size: 1.5rem; font-weight: 600; color: var(--text); line-height: 1; }
.export-stat-num.c-accent { color: var(--accent); }
.export-stat-label { font-size: .7rem; color: var(--text-3); margin-top: 4px; }

.export-author-table { width: 100%; border-collapse: collapse; }
.export-author-table th {
  text-align: left; font-size: .75rem; color: var(--text-3);
  font-weight: 500; padding: 8px 12px; border-bottom: 1px solid var(--border);
}
.export-author-table td { padding: 9px 12px; border-bottom: 1px solid var(--border); font-size: .85rem; color: var(--text-2); }
.export-td-num { text-align: right; font-variant-numeric: tabular-nums; }

.export-actions { display: flex; align-items: center; justify-content: space-between; padding: 4px 0; }
.export-last-time { font-size: .82rem; color: var(--text-3); }

/* ── Settings page ────────────────────────────────────────────────────────── */
.settings-section { margin-bottom: 36px; }
.settings-section-title {
  font-size: .78rem; color: var(--text-3);
  letter-spacing: .08em; text-transform: uppercase;
  margin-bottom: 14px; padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.label-types-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 16px; }
.label-type-item {
  display: flex; align-items: center; gap: 10px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--r); padding: 10px 14px;
}
.label-type-item-name { flex: 1; font-size: .9rem; color: var(--text); }
.label-type-add { display: flex; gap: 8px; }
.label-type-add input {
  flex: 1; background: var(--bg); border: 1px solid var(--border-light);
  border-radius: var(--r); padding: 8px 12px; color: var(--text);
  font-size: .88rem; outline: none; transition: border-color var(--tr);
}
.label-type-add input:focus { border-color: var(--accent); }

.image-type-options { display: flex; gap: 10px; }
.image-type-card {
  flex: 1; background: var(--bg-card); border: 2px solid var(--border);
  border-radius: var(--r-lg); padding: 16px; cursor: pointer;
  transition: border-color var(--tr);
}
.image-type-card.active { border-color: var(--accent); }
.image-type-card.disabled { opacity: .45; cursor: not-allowed; }
.image-type-name { font-size: .9rem; color: var(--text); margin-bottom: 4px; }
.image-type-desc { font-size: .78rem; color: var(--text-2); }
.image-type-tag {
  display: inline-block; font-size: .65rem; letter-spacing: .06em;
  padding: 2px 7px; border-radius: 10px; margin-top: 6px;
  background: var(--accent-dim); color: var(--accent);
}
.image-type-tag.disabled { background: var(--bg-card-2); color: var(--text-3); }

/* ── Help page ────────────────────────────────────────────────────────────── */
.help-content { max-width: 740px; }
.help-section { margin-bottom: 32px; }
.help-section h3 {
  font-family: Georgia, '宋体', serif;
  font-size: 1rem; font-weight: 400; color: var(--accent);
  margin-bottom: 12px; padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}
.help-section p, .help-section li {
  font-size: .88rem; color: var(--text-2); line-height: 1.8; margin-bottom: 6px;
}
.help-section ul, .help-section ol { padding-left: 20px; }
.help-shortcuts-table { width: 100%; border-collapse: collapse; font-size: .85rem; }
.help-shortcuts-table td { padding: 8px 12px; border-bottom: 1px solid var(--border); }
.help-shortcuts-table td:first-child { width: 120px; }
.help-shortcuts-table td:last-child { color: var(--text-2); }

/* ── Modals ───────────────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(0,0,0,0.75);
  display: flex; align-items: center; justify-content: center;
  backdrop-filter: blur(4px);
  animation: fadeIn .2s ease;
}
.modal-overlay.hidden { display: none; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 32px;
  max-width: 520px; width: 90%;
  box-shadow: 0 20px 60px rgba(0,0,0,.6);
  position: relative;
}
.modal-close {
  position: absolute; top: 14px; right: 14px;
  background: none; border: none; color: var(--text-3);
  font-size: 1.2rem; cursor: pointer; padding: 4px;
  transition: color var(--tr);
}
.modal-close:hover { color: var(--text); }

/* Guide modal */
.guide-progress { display: flex; gap: 6px; margin-bottom: 24px; }
.guide-dot {
  height: 3px; border-radius: 2px; flex: 1;
  background: var(--border); transition: background .3s;
}
.guide-dot.done { background: var(--accent); }
.guide-step-num { font-size: .75rem; color: var(--text-3); margin-bottom: 8px; }
.guide-title {
  font-family: Georgia, '宋体', serif;
  font-size: 1.2rem; color: var(--text); margin-bottom: 12px;
}
.guide-body { font-size: .88rem; color: var(--text-2); line-height: 1.8; margin-bottom: 24px; }
.guide-body strong { color: var(--text); }
.guide-actions { display: flex; gap: 10px; justify-content: flex-end; }

/* Image modal */
#modal-image .modal-inner {
  position: relative; max-width: 90vw; max-height: 90vh;
  display: flex; align-items: center; justify-content: center;
}
#modal-image img {
  max-width: 90vw; max-height: 90vh;
  object-fit: contain; border-radius: var(--r);
}

/* Detail modal */
.detail-modal-content {
  max-height: 60vh; overflow-y: auto;
  background: var(--bg); border-radius: var(--r);
  padding: 14px; font-size: .82rem;
  color: var(--text-2); line-height: 1.8;
  white-space: pre-wrap; word-break: break-all;
  border: 1px solid var(--border);
  margin-top: 12px;
}
.detail-modal-footer {
  margin-top: 12px; padding-top: 12px;
  border-top: 1px solid var(--border);
  text-align: right;
}
.detail-modal-footer a {
  font-size: .82rem; color: var(--accent);
  text-decoration: none;
}
.detail-modal-footer a:hover { text-decoration: underline; }

/* ── Toast ────────────────────────────────────────────────────────────────── */
.toast {
  position: fixed; bottom: 24px; right: 24px; z-index: 2000;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--r); padding: 12px 18px;
  font-size: .85rem; color: var(--text);
  box-shadow: 0 4px 20px rgba(0,0,0,.4);
  display: flex; align-items: center; gap: 10px;
  animation: slideUp .25s ease;
  max-width: 320px;
}
.toast.hidden { display: none; }
.toast.success { border-color: var(--success); }
.toast.error   { border-color: var(--error); }
.toast-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.toast.success .toast-dot { background: var(--success); }
.toast.error   .toast-dot { background: var(--error); }
@keyframes slideUp {
  from { transform: translateY(10px); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}

/* ── Empty / loading states ───────────────────────────────────────────────── */
.empty-state {
  text-align: center; padding: 60px 20px; color: var(--text-3);
  font-size: .9rem;
}
.loading-state {
  text-align: center; padding: 60px 20px; color: var(--text-3);
  font-size: .88rem;
}
.spinner {
  display: inline-block; width: 20px; height: 20px;
  border: 2px solid var(--border-light); border-top-color: var(--accent);
  border-radius: 50%; animation: spin .7s linear infinite;
  margin-bottom: 12px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Utility ──────────────────────────────────────────────────────────────── */
.hidden { display: none !important; }
.flex { display: flex; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.ml-auto { margin-left: auto; }
.text-muted { color: var(--text-2); }
.text-accent { color: var(--accent); }
.divider { height: 1px; background: var(--border); margin: 20px 0; }