/* Theme tokens and page foundation */
:root {
  color-scheme: light;
}

body.excel-viewer-page {
  --excel-page-bg: #f4f7fa;
  --excel-panel-bg: #ffffff;
  --excel-soft-bg: #f7f9fc;
  --excel-header-bg: #edf2f7;
  --excel-row-header-bg: #f3f6f9;
  --excel-text: #172033;
  --excel-muted: #5c687a;
  --excel-border: #cdd6e1;
  --excel-grid: #d7dee8;
  --excel-primary: #0969da;
  --excel-primary-hover: #075bbd;
  --excel-selected: #dbeafe;
  --excel-selected-border: #2563eb;
  --excel-success: #1a7f37;
  --excel-warning: #9a6700;
  --excel-error: #cf222e;
  --excel-shadow: 0 1px 2px rgba(15, 23, 42, 0.06);
  --excel-panel-radius: 10px;
  --excel-control-radius: 7px;
  --excel-control-height: 36px;
  --excel-panel-space: 14px;
  --excel-cell-min-width: 72px;
  --excel-cell-height: 30px;
  --excel-row-header-width: 62px;
  --excel-panel-padding: 14px;
}

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

body.excel-viewer-page {
  margin: 0;
  color: var(--excel-text);
  background: var(--excel-page-bg);
  font-family: Inter, "Noto Sans JP", "Yu Gothic UI", "Meiryo", sans-serif;
}

body.excel-viewer-page[data-theme="dark"] {
  color-scheme: dark;
  --excel-page-bg: #11161d;
  --excel-panel-bg: #171d25;
  --excel-soft-bg: #202733;
  --excel-header-bg: #252e3a;
  --excel-row-header-bg: #202833;
  --excel-text: #f3f6fb;
  --excel-muted: #aab5c4;
  --excel-border: #3a4656;
  --excel-grid: #354151;
  --excel-primary: #2f81f7;
  --excel-primary-hover: #58a6ff;
  --excel-selected: #163a63;
  --excel-selected-border: #58a6ff;
  --excel-success: #56d364;
  --excel-warning: #e3b341;
  --excel-error: #ff7b72;
  --excel-shadow: none;
}

/* Page frame and navigation */
.excel-viewer-main {
  width: min(1600px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 48px;
}

.excel-page-header {
  margin-block-end: 16px;
}

.excel-page-header h1 {
  margin: 10px 0 6px;
  font-size: clamp(1.5rem, 2.8vw, 2rem);
}

.excel-page-header p {
  margin: 0;
  color: var(--excel-muted);
}

.excel-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--excel-muted);
  font-size: 0.875rem;
}

.excel-breadcrumb a {
  color: var(--excel-primary);
}

.excel-notice,
.excel-panel {
  margin-block-end: var(--excel-panel-space);
  border: 1px solid var(--excel-border);
  border-radius: var(--excel-panel-radius);
  background: var(--excel-panel-bg);
  box-shadow: var(--excel-shadow);
}

.excel-notice {
  padding: 12px 14px;
  color: var(--excel-primary);
  background: color-mix(in srgb, var(--excel-primary) 8%, var(--excel-panel-bg));
}

.excel-panel {
  padding: var(--excel-panel-padding);
}

.excel-panel h2 {
  margin: 0;
  font-size: 1rem;
}

.excel-section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-block-end: 12px;
}

/* File input, metadata, and status */
.excel-drop-zone {
  display: grid;
  place-items: center;
  min-height: 120px;
  padding: 20px;
  border: 2px dashed var(--excel-border);
  border-radius: 8px;
  color: var(--excel-muted);
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.excel-drop-zone strong,
.excel-drop-zone span {
  display: block;
}

.excel-drop-zone strong {
  margin-block-end: 6px;
  color: var(--excel-text);
}

.excel-stats,
.excel-cell-details {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 8px;
  margin: 12px 0 0;
}

.excel-data-card {
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid var(--excel-border);
  border-radius: var(--excel-control-radius);
  background: var(--excel-soft-bg);
}

.excel-stats dt,
.excel-cell-details dt {
  margin-block-end: 4px;
  color: var(--excel-muted);
  font-size: 0.75rem;
}

.excel-stats dd,
.excel-cell-details dd {
  overflow-wrap: anywhere;
  margin: 0;
  font-size: 0.875rem;
  font-weight: 650;
}

.excel-status-area {
  margin-block-start: 10px;
}

.excel-status-area progress {
  width: 100%;
}

.excel-message {
  min-height: 1.5em;
  margin: 8px 0 0;
  color: var(--excel-muted);
}

.excel-message[data-type="success"] {
  color: var(--excel-success);
}

.excel-message[data-type="warning"] {
  color: var(--excel-warning);
}

.excel-message[data-type="error"] {
  color: var(--excel-error);
}

/* Workbook controls and formula bar */
.excel-workspace {
  padding: 0;
  overflow: hidden;
}

.excel-workspace-heading {
  padding: var(--excel-panel-padding) var(--excel-panel-padding) 0;
}

.excel-field {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-width: 0;
  color: var(--excel-muted);
  font-size: 0.8125rem;
}

.excel-theme-field select {
  min-width: 108px;
}

.excel-viewer-page :where(button, input, select) {
  min-height: var(--excel-control-height);
  border: 1px solid var(--excel-border);
  border-radius: var(--excel-control-radius);
  color: var(--excel-text);
  background: var(--excel-panel-bg);
  font: inherit;
}

.excel-viewer-page :where(input, select) {
  padding: 6px 10px;
}

.excel-viewer-page button {
  padding: 6px 12px;
  font-weight: 650;
  cursor: pointer;
}

.excel-viewer-page .excel-button-primary {
  border-color: var(--excel-primary);
  color: #ffffff;
  background: var(--excel-primary);
}

.excel-viewer-page .excel-button-danger {
  color: var(--excel-error);
}

.excel-toolbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px 14px;
  border-block-start: 1px solid var(--excel-border);
  border-block-end: 1px solid var(--excel-border);
  background: var(--excel-soft-bg);
}

.excel-toolbar-select {
  max-width: 220px;
}

.excel-search {
  display: flex;
  align-items: center;
  flex: 1 1 580px;
  gap: 6px;
  min-width: 0;
}

.excel-search-input {
  flex: 1 1 180px;
  min-width: 140px;
}

.excel-search-status {
  min-width: var(--excel-row-header-width);
  color: var(--excel-muted);
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.excel-toolbar-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-inline-start: auto;
}

.excel-formula-bar {
  display: grid;
  grid-template-columns: minmax(90px, auto) 1fr;
  gap: 8px;
  padding: 9px 14px;
  border-block-end: 1px solid var(--excel-border);
  background: var(--excel-panel-bg);
}

.excel-formula-address {
  display: grid;
  place-items: center;
  min-height: var(--excel-control-height);
  padding: 6px 10px;
  border: 1px solid var(--excel-border);
  border-radius: var(--excel-control-radius);
  font-family: "Cascadia Code", Consolas, monospace;
}

.excel-formula-input {
  width: 100%;
  font-family: "Cascadia Code", Consolas, monospace;
}

.excel-column-notice {
  margin: 0;
  padding: 8px 14px;
  color: var(--excel-warning);
  background: color-mix(in srgb, var(--excel-warning) 9%, var(--excel-panel-bg));
}

.excel-table-wrap {
  max-height: 720px;
  overflow: auto;
  background: var(--excel-panel-bg);
}

/* Worksheet grid and resize handles */
.excel-workbook-table {
  width: max-content;
  min-width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  table-layout: fixed;
  font-size: 0.8125rem;
}

.excel-workbook-table th,
.excel-workbook-table td {
  position: relative;
  min-width: var(--excel-cell-min-width);
  height: var(--excel-cell-height);
  padding: 5px 8px;
  border-inline-end: 1px solid var(--excel-grid);
  border-block-end: 1px solid var(--excel-grid);
  overflow: hidden;
  text-align: left;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.excel-workbook-table thead th {
  position: sticky;
  inset-block-start: 0;
  z-index: 3;
  color: var(--excel-muted);
  background: var(--excel-header-bg);
  text-align: center;
}

.excel-row-header-column {
  width: var(--excel-row-header-width);
}

.excel-row-header,
.excel-corner-cell {
  position: sticky;
  inset-inline-start: 0;
  z-index: 2;
  min-width: var(--excel-row-header-width);
  width: var(--excel-row-header-width);
  color: var(--excel-muted);
  background: var(--excel-row-header-bg);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.excel-corner-cell {
  z-index: 4;
}

.excel-data-cell {
  background: var(--excel-panel-bg);
  cursor: cell;
}

.excel-data-cell.has-formula::before,
.excel-data-cell.has-comment::after {
  position: absolute;
  width: 0;
  height: 0;
  content: "";
}

.excel-data-cell.has-formula::before {
  inset-block-start: 0;
  inset-inline-start: 0;
  border-block-start: 6px solid var(--excel-primary);
  border-inline-end: 6px solid transparent;
}

.excel-data-cell.has-comment::after {
  inset-block-start: 0;
  inset-inline-end: 0;
  border-block-start: 7px solid var(--excel-error);
  border-inline-start: 7px solid transparent;
}

.excel-column-resize-handle,
.excel-row-resize-handle {
  position: absolute;
  z-index: 5;
  display: block;
  touch-action: none;
}

.excel-column-resize-handle {
  inset-block-start: 0;
  inset-inline-end: -4px;
  width: 8px;
  height: 100%;
  cursor: col-resize;
}

.excel-column-resize-handle::after {
  position: absolute;
  inset-block-start: 0;
  inset-inline-end: 3px;
  width: 1px;
  height: 100%;
  background: transparent;
  content: "";
}

.excel-row-resize-handle {
  inset-inline-end: 0;
  inset-block-end: -4px;
  width: 100%;
  height: 8px;
  cursor: row-resize;
}

.excel-row-resize-handle::after {
  position: absolute;
  inset-inline-end: 0;
  inset-block-end: 3px;
  width: 100%;
  height: 1px;
  background: transparent;
  content: "";
}

.excel-empty-table {
  display: grid;
  place-items: center;
  min-height: 280px;
  margin: 0;
  padding: 24px;
  color: var(--excel-muted);
  text-align: center;
}

/* Pagination, cell details, and guidance */
.excel-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 7px;
  padding: 10px 14px;
  border-block-start: 1px solid var(--excel-border);
  background: var(--excel-soft-bg);
}

.excel-pagination-control {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.excel-page-number-input {
  width: 86px;
}

.excel-cell-details {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.excel-caution ul {
  margin: 10px 0 0;
  padding-inline-start: 1.4rem;
  color: var(--excel-muted);
}

.excel-caution li + li {
  margin-block-start: 5px;
}

/* Accessibility and browser fallbacks */
.excel-visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0 0 0 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.excel-viewer-clipboard-fallback {
  position: fixed;
  inset-block-start: -1000px;
  inset-inline-start: -1000px;
}

/* Interactive states */
.excel-table-wrap[hidden],
.excel-column-notice[hidden],
.excel-status-area progress[hidden],
.excel-empty-table[hidden] {
  display: none;
}

.excel-drop-zone:hover,
.excel-drop-zone.is-dragging {
  border-color: var(--excel-primary);
  background: color-mix(in srgb, var(--excel-primary) 7%, var(--excel-panel-bg));
}

.excel-viewer-page button:hover:not(:disabled) {
  border-color: var(--excel-primary);
  color: var(--excel-primary);
}

.excel-viewer-page .excel-button-primary:hover:not(:disabled) {
  border-color: var(--excel-primary-hover);
  color: #ffffff;
  background: var(--excel-primary-hover);
}

.excel-viewer-page button:disabled,
.excel-viewer-page input:disabled,
.excel-viewer-page select:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.excel-viewer-page :where(button, input, select, .excel-drop-zone, .excel-table-wrap):focus-visible {
  outline: 3px solid color-mix(in srgb, var(--excel-primary) 38%, transparent);
  outline-offset: 2px;
}

.excel-data-cell:hover {
  box-shadow: inset 0 0 0 1px var(--excel-selected-border);
}

.excel-data-cell.is-selected {
  background: var(--excel-selected);
  box-shadow: inset 0 0 0 2px var(--excel-selected-border);
}

.excel-column-header:hover .excel-column-resize-handle::after,
.excel-column-resize-handle.is-resizing::after,
.excel-row-header:hover .excel-row-resize-handle::after,
.excel-row-resize-handle.is-resizing::after {
  background: var(--excel-primary);
}

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

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

/* Responsive layout */
@media (max-width: 1100px) {
  .excel-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .excel-cell-details {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .excel-search {
    order: 3;
    flex-basis: 100%;
  }
}

@media (max-width: 700px) {
  body.excel-viewer-page {
    --excel-panel-padding: 10px;
  }

  .excel-viewer-main {
    width: min(100% - 20px, 1600px);
    padding-block-start: 16px;
  }

  .excel-stats,
  .excel-cell-details {
    grid-template-columns: 1fr;
  }

  .excel-toolbar,
  .excel-formula-bar {
    padding: 9px 10px;
  }

  .excel-toolbar-field,
  .excel-toolbar-field .excel-toolbar-select,
  .excel-toolbar-actions {
    width: 100%;
  }

  .excel-toolbar-actions button {
    flex: 1 1 180px;
  }

  .excel-search {
    align-items: stretch;
    flex-wrap: wrap;
  }

  .excel-search-field {
    width: 100%;
  }

  .excel-search-scope-select {
    flex: 1;
    max-width: none;
  }

  .excel-search-input {
    flex-basis: calc(100% - 70px);
  }

  .excel-formula-bar {
    grid-template-columns: 1fr;
  }

  .excel-table-wrap {
    max-height: 600px;
  }
}