* { margin: 0; padding: 0; box-sizing: border-box; }

/* ══════════════════════════════════════════════
   Theme: Dark (Catppuccin)
   ══════════════════════════════════════════════ */
:root, [data-theme="dark"] {
  --bg: #1e1e2e;
  --bg-secondary: #181825;
  --bg-surface: #252536;
  --bg-hover: #2a2a3c;
  --bg-selected: #313244;
  --border: #383850;
  --border-cell: #2a2a38;
  --text: #cdd6f4;
  --text-dim: #6c7086;
  --text-bright: #f0f0f8;
  --accent: #89b4fa;
  --green: #a6e3a1;
  --yellow: #f9e2af;
  --red: #f38ba8;
  --peach: #fab387;
  --toolbar-bg: #11111b;
  --tab-active: #313244;
  --badge-error-bg: #3d1215;
  --badge-warn-bg: #3d2e00;
  --badge-info-bg: #252536;
  --badge-pass-bg: #1a3a1a;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: "SF Mono", "Cascadia Code", "Fira Code", Consolas, monospace;
}

/* ══════════════════════════════════════════════
   Theme: Light
   ══════════════════════════════════════════════ */
[data-theme="light"] {
  --bg: #ffffff;
  --bg-secondary: #f4f4f5;
  --bg-surface: #e8e8ea;
  --bg-hover: #e0e0e4;
  --bg-selected: #cce0ff;
  --border: #cccccc;
  --border-cell: #e0e0e0;
  --text: #333333;
  --text-dim: #777777;
  --text-bright: #000000;
  --accent: #0055cc;
  --green: #1a8f2e;
  --yellow: #b8860b;
  --red: #cc2233;
  --peach: #d06020;
  --toolbar-bg: #e6e6e8;
  --tab-active: #ffffff;
  --badge-error-bg: #fde8e8;
  --badge-warn-bg: #fdf3d7;
  --badge-info-bg: #e8e8ea;
  --badge-pass-bg: #d4f5d4;
}

/* ══════════════════════════════════════════════
   Theme: Windows 3.11
   ══════════════════════════════════════════════ */
[data-theme="win311"] {
  --bg: #c0c0c0;
  --bg-secondary: #c0c0c0;
  --bg-surface: #ffffff;
  --bg-hover: #000080;
  --bg-selected: #000080;
  --border: #808080;
  --border-cell: #808080;
  --text: #000000;
  --text-dim: #404040;
  --text-bright: #000000;
  --accent: #000080;
  --green: #008000;
  --yellow: #808000;
  --red: #ff0000;
  --peach: #ff8000;
  --toolbar-bg: #c0c0c0;
  --tab-active: #c0c0c0;
  --badge-error-bg: #ffc0c0;
  --badge-warn-bg: #ffffc0;
  --badge-info-bg: #e0e0e0;
  --badge-pass-bg: #c0ffc0;
  --font: "MS Sans Serif", "Fixedsys", "Arial", sans-serif;
  --mono: "Fixedsys", "Courier New", monospace;
}

/* ── Base ── */
html, body {
  height: 100%;
  overflow: hidden;
  font-family: var(--font);
  font-size: 13px;
  background: var(--bg);
  color: var(--text);
}

/* ── Toolbar ── */
#toolbar {
  height: 36px;
  background: var(--toolbar-bg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  border-bottom: 1px solid var(--border);
}
.toolbar-left { display: flex; align-items: center; gap: 12px; }
.toolbar-right { display: flex; align-items: center; gap: 16px; }
.app-icon { height: 24px; width: 24px; image-rendering: pixelated; }
.app-name { font-weight: 700; color: var(--accent); font-size: 14px; }
.crawl-url { color: var(--text-dim); font-family: var(--mono); font-size: 12px; }
.stat { color: var(--text-dim); font-size: 12px; }

#theme-select {
  background: var(--bg-surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 2px 6px;
  font-size: 11px;
  font-family: var(--font);
  cursor: pointer;
}

/* ── Tab Bar ── */
#tab-bar {
  height: 32px;
  background: var(--bg-secondary);
  display: flex;
  align-items: stretch;
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  scrollbar-width: none;
}
#tab-bar::-webkit-scrollbar { display: none; }
.tab {
  padding: 0 14px;
  background: none;
  border: none;
  border-right: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 12px;
  cursor: pointer;
  white-space: nowrap;
  font-family: var(--font);
  transition: background 0.15s, color 0.15s;
}
.tab:hover { background: var(--bg-hover); color: var(--text); }
.tab.active { background: var(--tab-active); color: var(--text-bright); font-weight: 600; }

/* ── Filter Bar ── */
#filter-bar {
  height: 30px;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 10px;
  border-bottom: 1px solid var(--border);
}
#filter-select {
  background: var(--bg-surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 2px 6px;
  font-size: 12px;
  font-family: var(--font);
  cursor: pointer;
}
.row-count { color: var(--text-dim); font-size: 11px; }
#search-input {
  margin-left: auto;
  background: var(--bg-surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 2px 8px;
  font-size: 12px;
  font-family: var(--font);
  width: 220px;
}
#search-input:focus { outline: none; border-color: var(--accent); }

/* ── Main Container (horizontal split) ── */
#main-container {
  display: flex;
  flex-direction: row;
  height: calc(100vh - 120px); /* toolbar+tab+filter+status */
}

/* ── Left Area (master + detail vertical split) ── */
#left-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 400px;
}

/* ── Master Panel ── */
#master-panel {
  flex: 1;
  overflow: hidden;
  min-height: 100px;
}
#master-table-wrap {
  height: 100%;
  overflow: auto;
}

#master-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
}
#master-table thead {
  position: sticky;
  top: 0;
  z-index: 2;
}
#master-table th {
  background: var(--bg-secondary);
  color: var(--text-dim);
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 5px 8px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  border-right: 1px solid var(--border);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
#master-table th:hover { background: var(--bg-hover); }
#master-table th .sort-arrow { margin-left: 3px; font-size: 9px; color: var(--accent); }

#master-table td {
  padding: 3px 8px;
  border-bottom: 1px solid var(--border-cell);
  border-right: 1px solid var(--border-cell);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 12px;
}
#master-table tbody tr { cursor: pointer; }
#master-table tbody tr:hover td { background: var(--bg-hover); }
#master-table tbody tr.selected td { background: var(--bg-selected); }

/* Cell styling */
.cell-url { font-family: var(--mono); font-size: 11px; color: var(--accent); }
.cell-url a { color: inherit; text-decoration: none; }
.cell-url a:hover { text-decoration: underline; }
.cell-url .current-link { color: var(--text-dim); font-size: 10px; }
.cell-num { text-align: right; font-family: var(--mono); font-size: 11px; }
.cell-status { font-weight: 600; }
.status-2xx { color: var(--green); }
.status-3xx { color: var(--yellow); }
.status-4xx { color: var(--red); }
.status-5xx { color: var(--red); }
.status-0 { color: var(--text-dim); }
.cell-issue { font-size: 11px; }
.cell-indexable { color: var(--green); font-weight: 600; font-size: 11px; }
.cell-non-indexable { color: var(--red); font-weight: 600; font-size: 11px; }
.severity-error { color: var(--red); }
.severity-warning { color: var(--yellow); }
.severity-info { color: var(--text-dim); }

/* ── Resize Handles ── */
#resize-handle {
  height: 4px;
  background: var(--border);
  cursor: row-resize;
  flex-shrink: 0;
}
#resize-handle:hover { background: var(--accent); }

#resize-handle-v {
  width: 4px;
  background: var(--border);
  cursor: col-resize;
  flex-shrink: 0;
}
#resize-handle-v:hover { background: var(--accent); }

/* ── Detail Panel ── */
#detail-panel {
  height: 260px;
  min-height: 80px;
  display: flex;
  flex-direction: column;
  background: var(--bg-secondary);
}
#detail-tabs {
  height: 28px;
  display: flex;
  align-items: stretch;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  overflow-x: auto;
  scrollbar-width: none;
}
#detail-tabs::-webkit-scrollbar { display: none; }
.detail-tab {
  padding: 0 12px;
  background: none;
  border: none;
  border-right: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 11px;
  cursor: pointer;
  white-space: nowrap;
  font-family: var(--font);
}
.detail-tab:hover { background: var(--bg-hover); color: var(--text); }
.detail-tab.active { background: var(--tab-active); color: var(--text-bright); font-weight: 600; }

#detail-content {
  flex: 1;
  overflow: auto;
  padding: 0;
}
.detail-empty {
  padding: 24px;
  color: var(--text-dim);
  text-align: center;
  font-size: 12px;
}

/* Detail tables */
.detail-table {
  width: 100%;
  border-collapse: collapse;
}
.detail-table th {
  background: var(--bg);
  color: var(--text-dim);
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  padding: 4px 8px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
}
.detail-table td {
  padding: 3px 8px;
  border-bottom: 1px solid var(--border-cell);
  font-size: 12px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 600px;
}
.detail-table tbody tr:hover td { background: var(--bg-hover); }

/* Info grid */
.info-grid {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 0;
  padding: 8px;
}
.info-grid .label {
  color: var(--text-dim);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  padding: 3px 8px;
  border-bottom: 1px solid var(--border);
}
.info-grid .value {
  font-size: 12px;
  padding: 3px 8px;
  border-bottom: 1px solid var(--border);
  font-family: var(--mono);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Badge */
.badge {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 10px;
  font-weight: 600;
}
.badge-error { background: var(--badge-error-bg); color: var(--red); }
.badge-warning { background: var(--badge-warn-bg); color: var(--yellow); }
.badge-info { background: var(--badge-info-bg); color: var(--text-dim); }
.badge-pass { background: var(--badge-pass-bg); color: var(--green); }

/* ── Right Panel ── */
#right-panel {
  width: 300px;
  min-width: 180px;
  display: flex;
  flex-direction: column;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border);
}
#right-tabs {
  height: 28px;
  display: flex;
  align-items: stretch;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}
.right-tab {
  padding: 0 12px;
  background: none;
  border: none;
  border-right: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 11px;
  cursor: pointer;
  white-space: nowrap;
  font-family: var(--font);
}
.right-tab:hover { background: var(--bg-hover); color: var(--text); }
.right-tab.active { background: var(--tab-active); color: var(--text-bright); font-weight: 600; }
#right-content {
  flex: 1;
  overflow: auto;
  padding: 0;
}

/* Right panel summary */
.right-section {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
}
.right-section-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 6px;
  letter-spacing: 0.03em;
}
.summary-row {
  display: flex;
  justify-content: space-between;
  padding: 2px 0;
  font-size: 12px;
}
.summary-row .label { color: var(--text); }
.summary-row .val { font-family: var(--mono); font-size: 11px; color: var(--text-bright); }
.summary-row .pct { font-family: var(--mono); font-size: 10px; color: var(--text-dim); margin-left: 6px; }

/* Breakdown table in right panel */
.breakdown-table {
  width: 100%;
  border-collapse: collapse;
}
.breakdown-table th {
  font-size: 10px;
  text-transform: uppercase;
  color: var(--text-dim);
  font-weight: 600;
  padding: 3px 6px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.breakdown-table th:last-child,
.breakdown-table td:last-child { text-align: right; }
.breakdown-table td {
  padding: 2px 6px;
  font-size: 12px;
  border-bottom: 1px solid var(--border-cell);
}
.breakdown-table td.num {
  text-align: right;
  font-family: var(--mono);
  font-size: 11px;
}

/* Pie chart */
.chart-wrap {
  text-align: center;
  padding: 10px 0;
}
.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  justify-content: center;
  padding: 6px 10px;
  font-size: 11px;
}
.legend-item {
  display: flex;
  align-items: center;
  gap: 4px;
}
.legend-swatch {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  flex-shrink: 0;
}

/* Response time bars */
.bar-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 3px 0;
  font-size: 11px;
}
.bar-label {
  width: 55px;
  text-align: right;
  color: var(--text-dim);
  flex-shrink: 0;
}
.bar-track {
  flex: 1;
  height: 14px;
  background: var(--bg-surface);
  border-radius: 2px;
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  min-width: 1px;
}
.bar-count {
  width: 40px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-dim);
}

/* Issue rows in right panel */
.issue-row { display: flex; justify-content: space-between; align-items: center;
  padding: 4px 8px; cursor: pointer; border-bottom: 1px solid var(--border); font-size: 11px; }
.issue-row:hover { background: var(--bg-hover); }
.issue-row .issue-name { flex: 1; }
.issue-row .issue-count { font-family: var(--mono); min-width: 30px; text-align: right; }
.issue-row-pass { opacity: 0.55; cursor: default; }
.issue-row-pass:hover { background: transparent; opacity: 0.7; }
.issue-row-pass .issue-count { color: var(--green); font-weight: 600; }

/* SERP Snippet preview */
.serp-preview {
  padding: 16px;
  max-width: 600px;
}
.serp-card {
  padding: 12px;
  background: var(--bg-surface);
  border-radius: 6px;
  margin-bottom: 12px;
}
.serp-title {
  font-size: 18px;
  color: var(--accent);
  line-height: 1.3;
  margin-bottom: 2px;
  cursor: pointer;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.serp-url {
  font-size: 13px;
  color: var(--green);
  margin-bottom: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.serp-desc {
  font-size: 13px;
  color: var(--text);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.serp-meta {
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 8px;
}
.serp-meta .ok { color: var(--green); }
.serp-meta .warn { color: var(--yellow); }

/* ── Status Bar ── */
#status-bar {
  height: 22px;
  background: var(--toolbar-bg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-dim);
}

@media (max-width: 900px) {
  .tab { padding: 0 8px; font-size: 11px; }
  #right-panel { display: none; }
  #resize-handle-v { display: none; }
}

/* ══════════════════════════════════════════════
   Windows 3.11 overrides
   ══════════════════════════════════════════════ */

[data-theme="win311"] .tab:hover,
[data-theme="win311"] #master-table th:hover,
[data-theme="win311"] .detail-tab:hover,
[data-theme="win311"] .right-tab:hover,
[data-theme="win311"] #master-table tbody tr:hover td,
[data-theme="win311"] .detail-table tbody tr:hover td {
  color: #ffffff;
}
[data-theme="win311"] #master-table tbody tr.selected td { color: #ffffff; }
[data-theme="win311"] .tab:hover .cell-url,
[data-theme="win311"] #master-table tbody tr:hover .cell-url,
[data-theme="win311"] #master-table tbody tr.selected .cell-url { color: #ffffff; }
[data-theme="win311"] #master-table tbody tr.selected .current-link,
[data-theme="win311"] #master-table tbody tr:hover .current-link { color: #ffffff; }

[data-theme="win311"] #toolbar {
  border-bottom: none;
  border-top: 2px solid #ffffff;
  border-left: 2px solid #ffffff;
  border-right: 2px solid #404040;
  border-bottom: 2px solid #404040;
}
[data-theme="win311"] .tab {
  border: none;
  border-right: 1px solid #808080;
  font-family: "MS Sans Serif", Arial, sans-serif;
}
[data-theme="win311"] .tab.active,
[data-theme="win311"] .detail-tab.active,
[data-theme="win311"] .right-tab.active {
  border-top: 2px solid #ffffff;
  border-left: 2px solid #ffffff;
  border-right: 2px solid #404040;
  border-bottom: 2px solid #c0c0c0;
  font-weight: 700;
}

[data-theme="win311"] #search-input,
[data-theme="win311"] #filter-select,
[data-theme="win311"] #theme-select {
  border-radius: 0;
  border: 2px inset #c0c0c0;
}
[data-theme="win311"] #master-table-wrap { border: 2px inset #c0c0c0; }
[data-theme="win311"] #detail-content { border: 2px inset #c0c0c0; background: #ffffff; }
[data-theme="win311"] #right-content { border: 2px inset #c0c0c0; background: #ffffff; }

[data-theme="win311"] #resize-handle {
  height: 6px;
  border-top: 2px solid #ffffff;
  border-bottom: 2px solid #404040;
  background: #c0c0c0;
}
[data-theme="win311"] #resize-handle:hover { background: #a0a0a0; }
[data-theme="win311"] #resize-handle-v {
  width: 6px;
  border-left: 2px solid #ffffff;
  border-right: 2px solid #404040;
  background: #c0c0c0;
}
[data-theme="win311"] #resize-handle-v:hover { background: #a0a0a0; }

[data-theme="win311"] #status-bar {
  border-top: none;
  border-top: 2px solid #ffffff;
  border-left: 2px solid #ffffff;
  border-right: 2px solid #404040;
  border-bottom: 2px solid #404040;
}

[data-theme="win311"] .badge { border-radius: 0; border: 1px solid #808080; }
[data-theme="win311"] .bar-track { border: 2px inset #c0c0c0; border-radius: 0; }
[data-theme="win311"] .bar-fill { border-radius: 0; }
[data-theme="win311"] .serp-card { border-radius: 0; border: 2px inset #c0c0c0; background: #ffffff; }

[data-theme="win311"] #master-table th {
  background: #c0c0c0;
  border: none;
  border-right: 1px solid #404040;
  border-bottom: 1px solid #404040;
  box-shadow: inset 1px 1px 0 #ffffff, inset -1px -1px 0 #808080;
}
[data-theme="win311"] #master-table th:hover { background: #b0b0b0; color: #000000; }
[data-theme="win311"] #master-table td {
  border-right: 1px solid #c0c0c0;
  border-bottom: 1px solid #c0c0c0;
  background: #ffffff;
}
[data-theme="win311"] .detail-table th {
  background: #c0c0c0;
  box-shadow: inset 1px 1px 0 #ffffff, inset -1px -1px 0 #808080;
}
[data-theme="win311"] .detail-table td { background: #ffffff; }
[data-theme="win311"] .breakdown-table td { background: #ffffff; }

/* The glorious scrollbars */
[data-theme="win311"] ::-webkit-scrollbar { width: 16px; height: 16px; }
[data-theme="win311"] ::-webkit-scrollbar-track {
  background: repeating-conic-gradient(#c0c0c0 0% 25%, #ffffff 0% 50%) 50% / 2px 2px;
}
[data-theme="win311"] ::-webkit-scrollbar-thumb {
  background: #c0c0c0;
  border-top: 2px solid #ffffff; border-left: 2px solid #ffffff;
  border-right: 2px solid #404040; border-bottom: 2px solid #404040;
}
[data-theme="win311"] ::-webkit-scrollbar-thumb:hover { background: #b0b0b0; }
[data-theme="win311"] ::-webkit-scrollbar-button:single-button {
  background: #c0c0c0;
  border-top: 2px solid #ffffff; border-left: 2px solid #ffffff;
  border-right: 2px solid #404040; border-bottom: 2px solid #404040;
  display: block; height: 16px; width: 16px;
}
[data-theme="win311"] ::-webkit-scrollbar-button:single-button:hover { background: #b0b0b0; }
[data-theme="win311"] ::-webkit-scrollbar-button:single-button:vertical:decrement {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8'%3E%3Cpolygon points='4,2 7,6 1,6' fill='black'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: center;
}
[data-theme="win311"] ::-webkit-scrollbar-button:single-button:vertical:increment {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8'%3E%3Cpolygon points='4,6 1,2 7,2' fill='black'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: center;
}
[data-theme="win311"] ::-webkit-scrollbar-button:single-button:horizontal:decrement {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8'%3E%3Cpolygon points='2,4 6,1 6,7' fill='black'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: center;
}
[data-theme="win311"] ::-webkit-scrollbar-button:single-button:horizontal:increment {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8'%3E%3Cpolygon points='6,4 2,1 2,7' fill='black'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: center;
}
[data-theme="win311"] * { scrollbar-width: auto; scrollbar-color: #c0c0c0 #dfdfdf; }
[data-theme="win311"] #tab-bar { scrollbar-width: auto; }
[data-theme="win311"] #tab-bar::-webkit-scrollbar { display: block; height: 16px; }

[data-theme="light"] #tab-bar { scrollbar-width: none; }
[data-theme="light"] #tab-bar::-webkit-scrollbar { display: none; }

/* ── Column Selector ── */
#col-selector-btn {
  background: var(--bg-surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 2px 8px;
  font-size: 11px;
  font-family: var(--font);
  cursor: pointer;
  white-space: nowrap;
}
#col-selector-btn:hover { background: var(--bg-hover); }

.col-selector-panel {
  position: fixed;
  z-index: 100;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  padding: 8px 0;
  min-width: 200px;
  max-height: 400px;
  overflow-y: auto;
}
.col-selector-panel label {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 3px 12px;
  font-size: 12px;
  cursor: pointer;
  white-space: nowrap;
}
.col-selector-panel label:hover { background: var(--bg-hover); }
.col-selector-panel input[type="checkbox"] { margin: 0; cursor: pointer; }
.col-selector-reset {
  display: block;
  padding: 6px 12px;
  font-size: 11px;
  color: var(--accent);
  cursor: pointer;
  border-top: 1px solid var(--border);
  margin-top: 4px;
  text-align: center;
}
.col-selector-reset:hover { text-decoration: underline; }

[data-theme="win311"] #col-selector-btn {
  border-radius: 0;
  border: 2px outset #c0c0c0;
}
[data-theme="win311"] #col-selector-btn:hover { background: #b0b0b0; }
[data-theme="win311"] .col-selector-panel {
  border-radius: 0;
  border: 2px outset #c0c0c0;
  box-shadow: none;
  background: #c0c0c0;
}
[data-theme="win311"] .col-selector-panel label:hover {
  background: #000080;
  color: #ffffff;
}