body.csv-viewer-page {
  /* CSV viewer design tokens are namespaced to avoid affecting the shared site frame. */
  color-scheme: light;
  --csv-background: #f4f6f8;
  --csv-surface: #ffffff;
  --csv-surface-2: #f6f8fa;
  --csv-border: #d0d7de;
  --csv-text: #1f2328;
  --csv-muted: #57606a;
  --csv-accent: #0969da;
  --csv-accent-hover: #0757b5;
  --csv-success: #1a7f37;
  --csv-warning: #9a6700;
  --csv-danger: #cf222e;
  --csv-shadow: 0 14px 36px rgba(31, 35, 40, .08);
  --csv-panel-radius: 12px;
  --csv-panel-padding: 18px;
  --csv-panel-compact-padding: 14px;
  --csv-control-height: 39px;
  --csv-control-radius: 8px;
  --csv-control-gap: 9px;
  --csv-notice-text: #0550ae;
  --csv-notice-background: #ddf4ff;
  --csv-notice-border: #b6e3ff;
  --csv-drop-zone-border: #8c959f;
  --csv-table-max-height: 680px;
  --csv-table-cell-min-width: 120px;
  --csv-table-cell-max-width: 420px;
  --csv-table-row-number-width: 70px;
  --csv-table-header-background: #eaeef2;
  --csv-table-stripe-background: #f6f8fa;
  --csv-table-hover-background: #ddf4ff;
  --csv-table-empty-text: #8c959f;
  --csv-resize-handle-size: 8px;
  --csv-resize-handle-offset: -4px;
  --csv-resize-guide-size: 2px;
  --csv-resize-guide-offset: 3px;
  min-height: 100vh;
  margin: 0;
  color: var(--csv-text);
  background: var(--csv-background);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}

body.csv-viewer-page,
body.csv-viewer-page * {
  box-sizing: border-box;
}

/* Page heading and navigation */
.csv-viewer-page > main {
  width: min(1480px, calc(100% - 32px));
  margin: 0 auto;
  padding: 38px 0;
}

.csv-viewer-page > main .csv-page-header {
  margin-bottom: 18px;
}

.csv-viewer-page > main .page-title {
  margin: 0;
  font-size: clamp(1.7rem, 3vw, 2.2rem);
}

.csv-viewer-page > main .page-description {
  margin: 8px 0 0;
  color: var(--csv-muted);
  line-height: 1.7;
}

.csv-viewer-page > main .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  color: var(--csv-muted);
  font-size: .9rem;
}

.csv-viewer-page > main .breadcrumb-link {
  color: var(--csv-accent);
  font-weight: 700;
  text-decoration: none;
}

.csv-viewer-page > main .breadcrumb-link:hover,
.csv-viewer-page > main .breadcrumb-link:focus-visible {
  text-decoration: underline;
}

/* Shared panels and notices */
.csv-viewer-page > main .notice,
.csv-viewer-page > main .panel {
  margin-bottom: 16px;
  background: var(--csv-surface);
  border: 1px solid var(--csv-border);
  border-radius: var(--csv-panel-radius);
  box-shadow: var(--csv-shadow);
}

.csv-viewer-page > main .notice {
  padding: 12px 14px;
  color: var(--csv-notice-text);
  background: var(--csv-notice-background);
  border-color: var(--csv-notice-border);
  line-height: 1.65;
}

.csv-viewer-page > main .panel {
  padding: var(--csv-panel-padding);
}

.csv-viewer-page > main .panel-title {
  margin: 0 0 14px;
  font-size: 1.1rem;
}

/* Data source */
.csv-viewer-page > main .source-grid {
  display: grid;
  grid-template-columns: minmax(320px, .9fr) minmax(360px, 1.1fr);
  gap: 16px;
}

.csv-viewer-page > main .drop-zone {
  display: grid;
  min-height: 190px;
  place-items: center;
  padding: 24px;
  color: var(--csv-muted);
  background: var(--csv-surface-2);
  border: 2px dashed var(--csv-drop-zone-border);
  border-radius: 10px;
  text-align: center;
  cursor: pointer;
}

.csv-viewer-page > main .drop-zone strong {
  display: block;
  margin-bottom: 7px;
  color: var(--csv-text);
}

.csv-viewer-page > main .drop-zone.is-dragging {
  color: var(--csv-accent);
  background: var(--csv-notice-background);
  border-color: var(--csv-accent);
}

.csv-viewer-page > main .source-editor {
  display: grid;
  gap: 10px;
}

.csv-viewer-page > main .source-editor textarea {
  min-height: 150px;
}

/* Form controls and messages */
.csv-viewer-page > main .field {
  display: grid;
  gap: 6px;
}

.csv-viewer-page > main .field label {
  color: var(--csv-muted);
  font-weight: 700;
}

.csv-viewer-page > main .hint {
  margin: 0;
  color: var(--csv-muted);
  font-size: .84rem;
  line-height: 1.55;
}

.csv-viewer-page > main .form-control,
.csv-viewer-page > main button {
  color: var(--csv-text);
  background: var(--csv-surface);
  border: 1px solid var(--csv-border);
  border-radius: var(--csv-control-radius);
  font: inherit;
}

.csv-viewer-page > main input.form-control,
.csv-viewer-page > main select.form-control {
  min-height: var(--csv-control-height);
  padding: 7px 10px;
}

.csv-viewer-page > main textarea.form-control {
  width: 100%;
  padding: 10px;
  resize: vertical;
  font: 13px/1.55 "Cascadia Code", Consolas, monospace;
}

.csv-viewer-page > main input[type="checkbox"] {
  width: 17px;
  height: 17px;
  min-height: 0;
  margin: 0;
  padding: 0;
  accent-color: var(--csv-accent);
}

.csv-viewer-page > main button {
  min-height: var(--csv-control-height);
  padding: 7px 13px;
  background: var(--csv-surface-2);
  font-weight: 700;
  cursor: pointer;
}

.csv-viewer-page > main button.primary {
  color: #fff;
  background: var(--csv-accent);
  border-color: var(--csv-accent);
}

.csv-viewer-page > main button.primary:hover,
.csv-viewer-page > main button.primary:focus-visible {
  background: var(--csv-accent-hover);
}

.csv-viewer-page > main button.danger {
  color: var(--csv-danger);
}

.csv-viewer-page > main button:disabled {
  cursor: not-allowed;
  opacity: .5;
}

.csv-viewer-page > main .inline-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--csv-control-gap);
}

.csv-viewer-page > main .controls {
  align-items: flex-end;
}

.csv-viewer-page > main .controls .field {
  min-width: 145px;
}

.csv-viewer-page > main .controls .search-field {
  flex: 1 1 280px;
}

.csv-viewer-page > main .checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: var(--csv-control-height);
  font-weight: 700;
}

.csv-viewer-page > main .message {
  min-height: 24px;
  margin: 11px 0 0;
  color: var(--csv-muted);
  font-size: .9rem;
  line-height: 1.55;
}

.csv-viewer-page > main .message.success {
  color: var(--csv-success);
}

.csv-viewer-page > main .message.warning {
  color: var(--csv-warning);
}

.csv-viewer-page > main .message.error {
  color: var(--csv-danger);
}

/* Result summary and data table */
.csv-viewer-page > main .result-heading {
  justify-content: space-between;
  margin-bottom: 12px;
}

.csv-viewer-page > main .result-heading h2 {
  margin: 0;
}

.csv-viewer-page > main .stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(120px, 1fr));
  gap: 8px;
  margin-bottom: 12px;
}

.csv-viewer-page > main .stat {
  padding: 9px 12px;
  background: var(--csv-surface-2);
  border: 1px solid var(--csv-border);
  border-radius: 8px;
}

.csv-viewer-page > main .stat span {
  display: block;
  color: var(--csv-muted);
  font-size: .76rem;
}

.csv-viewer-page > main .stat strong {
  display: block;
  margin-top: 3px;
  overflow-wrap: anywhere;
}

.csv-viewer-page > main .table-wrap {
  max-height: var(--csv-table-max-height);
  overflow: auto;
  background: var(--csv-surface);
  border: 1px solid var(--csv-border);
  border-radius: 9px;
}

.csv-viewer-page > main table {
  width: max-content;
  min-width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: .88rem;
}

.csv-viewer-page > main .visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  white-space: nowrap;
  border: 0;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
}

.csv-viewer-page > main th,
.csv-viewer-page > main td {
  min-width: var(--csv-table-cell-min-width);
  max-width: var(--csv-table-cell-max-width);
  padding: 8px 10px;
  border-right: 1px solid var(--csv-border);
  border-bottom: 1px solid var(--csv-border);
  text-align: left;
  vertical-align: top;
}

.csv-viewer-page > main th {
  position: sticky;
  top: 0;
  z-index: 2;
  color: var(--csv-text);
  background: var(--csv-table-header-background);
  white-space: nowrap;
}

.csv-viewer-page > main th:last-child,
.csv-viewer-page > main td:last-child {
  border-right: 0;
}

.csv-viewer-page > main tbody tr:last-child td {
  border-bottom: 0;
}

.csv-viewer-page > main tbody tr:nth-child(even) td {
  background: var(--csv-table-stripe-background);
}

.csv-viewer-page > main tbody tr:hover td {
  background: var(--csv-table-hover-background);
}

.csv-viewer-page > main td {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.csv-viewer-page > main td.empty-cell {
  color: var(--csv-table-empty-text);
}

.csv-viewer-page > main .row-number {
  left: 0;
  z-index: 3;
  min-width: var(--csv-table-row-number-width);
  width: var(--csv-table-row-number-width);
  max-width: var(--csv-table-row-number-width);
  color: var(--csv-muted);
  background: var(--csv-table-header-background) !important;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.csv-viewer-page > main tbody .row-number {
  position: sticky;
  z-index: 1;
  overflow: visible;
}

/* Mouse resize handles stay centered on the visible cell boundaries. */
.csv-viewer-page > main .column-resize-handle,
.csv-viewer-page > main .row-resize-handle {
  position: absolute;
  z-index: 5;
  touch-action: none;
  user-select: none;
}

.csv-viewer-page > main .column-resize-handle {
  top: 0;
  right: var(--csv-resize-handle-offset);
  width: var(--csv-resize-handle-size);
  height: 100%;
  cursor: col-resize;
}

.csv-viewer-page > main .column-resize-handle::after {
  position: absolute;
  top: 20%;
  right: var(--csv-resize-guide-offset);
  bottom: 20%;
  width: var(--csv-resize-guide-size);
  background: transparent;
  content: "";
}

.csv-viewer-page > main th:hover .column-resize-handle::after,
.csv-viewer-page > main .column-resize-handle.is-resizing::after {
  background: var(--csv-accent);
}

.csv-viewer-page > main th:hover {
  z-index: 6;
}

.csv-viewer-page > main .row-resize-handle {
  right: 0;
  bottom: var(--csv-resize-handle-offset);
  left: 0;
  height: var(--csv-resize-handle-size);
  cursor: row-resize;
}

.csv-viewer-page > main .row-resize-handle::after {
  position: absolute;
  right: 18%;
  bottom: var(--csv-resize-guide-offset);
  left: 18%;
  height: var(--csv-resize-guide-size);
  background: transparent;
  content: "";
}

.csv-viewer-page > main tbody tr:hover .row-resize-handle::after,
.csv-viewer-page > main .row-resize-handle.is-resizing::after {
  background: var(--csv-accent);
}

.csv-viewer-page > main tbody tr:hover .row-number {
  z-index: 4;
}

body.csv-viewer-page.is-resizing-column,
body.csv-viewer-page.is-resizing-column * {
  cursor: col-resize !important;
  user-select: none !important;
}

body.csv-viewer-page.is-resizing-row,
body.csv-viewer-page.is-resizing-row * {
  cursor: row-resize !important;
  user-select: none !important;
}

.csv-viewer-page > main .sort-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 30px;
  padding: 3px 6px;
  border: 0;
  background: transparent;
  text-align: left;
}

.csv-viewer-page > main .sort-indicator {
  color: var(--csv-accent);
}

.csv-viewer-page > main .empty-table {
  padding: 42px 16px;
  color: var(--csv-muted);
  text-align: center;
}

.csv-viewer-page > main .pagination {
  justify-content: flex-end;
  margin-top: 12px;
}

.csv-viewer-page > main .page-status {
  min-width: 150px;
  color: var(--csv-muted);
  text-align: center;
  font-size: .88rem;
}

.csv-viewer-page > main [hidden] {
  display: none !important;
}

/* Responsive layout */
@media (max-width: 820px) {
  body.csv-viewer-page {
    --csv-table-max-height: 560px;
  }

  .csv-viewer-page > main {
    width: min(100% - 24px, 1480px);
    padding: 24px 0;
  }

  .csv-viewer-page > main .source-grid {
    grid-template-columns: 1fr;
  }

  .csv-viewer-page > main .stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  .csv-viewer-page > main .panel {
    padding: var(--csv-panel-compact-padding);
  }

  .csv-viewer-page > main .pagination button {
    flex: 1 1 90px;
  }

  .csv-viewer-page > main .page-status {
    order: -1;
    width: 100%;
  }
}